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JP2006186758

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JP2006186758
An object of the present invention is to minimize the influence of noise generated from the
electronic device side and to improve the sound collection characteristic of a microphone. The
microphone device 200 includes a microphone housing case 2002, three microphones 80A, 80B,
and 80C, and a substrate 88. The microphone housing case 202 includes a microphone housing
portion having an elongated housing space 208 for housing the microphone. The substrate 88
has a width 204 and a length larger than the width, and the substrate 88 is disposed at the
bottom of the storage space 208 with its longitudinal direction directed to the length of the
storage space 208. The three microphones 80A, 80B, 80C are disposed above the substrate 88 in
the housing space 208. [Selected figure] Figure 20
Microphone device
[0001]
The present invention relates to a microphone device attached to an electronic device such as an
imaging device.
[0002]
There is a microphone device attached to a case constituting an exterior of an electronic device
such as an imaging device to perform sound collection.
As such a microphone device, a plurality of microphones and signal processing circuits are
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housed in the case, and audio signals output from the respective microphones are processed by
the signal processing circuit, for example, a plurality of channels adapted to a surround system. It
has been proposed that audio signals be generated and audio signals of these multiple channels
be supplied to the audio input terminal of an imaging device (see Patent Document 1). Japanese
Patent Application Publication No. 2003-18543
[0003]
In the above-described microphone device, in order to secure the characteristics of the audio
signal supplied from the microphone device to the electronic device, it is required to reduce the
noise component contained in the audio signal output from each microphone. However, since the
microphone device is attached to the electronic device, there is a disadvantage that it is easy to
pick up noise generated on the electronic device side. Also, in this type of microphone device, the
supply of power to the microphone and the exchange of electrical signals with the microphone
are performed via the substrate housed in the case of the microphone device, but the substrate
accommodates the microphone. It is projected into the space where the sound is picked up,
which hinders the sound collection and is disadvantageous in improving the sound collection
characteristics of the microphone. The present invention has been made in view of such
circumstances, and its object is advantageous in minimizing the influence of noise generated
from the electronic device side, and also for improving the sound collection characteristic of the
microphone. To provide an advantageous microphone device.
[0004]
In order to achieve the above-mentioned object, the present invention is a microphone device
attached to an electronic device, which is a substrate for transmitting and receiving electric
signals between a microphone housing case, a plurality of microphones, and the plurality of
microphones. And the microphone housing case has a microphone housing portion having an
elongated housing space for housing the microphone, the substrate has a width and a length
larger than the width, and the substrate is The plurality of microphones are disposed above the
substrate in the accommodation space, being disposed at the bottom of the accommodation
space with the longitudinal direction oriented in the longitudinal direction of the accommodation
space.
[0005]
Therefore, according to the present invention, since the plurality of microphones are disposed
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above the substrate in the accommodation space of the microphone accommodation unit, noise
generated on the imaging device side is isolated by the substrate and disposed above the
substrate. It becomes difficult to be transmitted to a plurality of microphones, which is
advantageous in minimizing the influence of noise generated from the imaging device side.
In addition, since a plurality of microphones are disposed above the substrate in the
accommodation space, there is no member that interferes with sound collection around each
microphone, and therefore, the sound collection characteristics of each microphone It is
advantageous to improve.
[0006]
The above object is achieved by disposing a plurality of microphones above the substrate in the
housing space of the microphone housing.
[0007]
Next, a first embodiment of the present invention will be described with reference to the
drawings.
In the present embodiment, the electronic device is a video camera 100. FIG. 1 is a perspective
view of the video camera 100 according to the first embodiment as viewed from the front. FIG. 2
is a perspective view showing the shutter of the electronic device connector provided in the
electronic device in the closed position, and FIG. 3 is a perspective view showing the shutter of
the electronic device connector provided in the electronic device in the open position FIG. 4 (A) is
a plan view of the connector on the electronic device side, (B) is a view on arrow B of (A), (C) is a
view on arrow C in (A), and (D) is an arrow D in (A). FIG. FIG. 5 (E) is a view on arrow E in FIG. 4
(D), and FIG. 5 (F) is a cross-sectional view taken on line FF of (E). 6 is a perspective view of the
microphone side connector provided in the microphone device, FIG. 7 is a plan view of the
microphone side connector, FIG. 8 is a view on arrow A in FIG. 6, and FIG. 9 is a view on arrow B
in FIG. 8 is a cross-sectional view taken along the line CC of FIG. FIG. 11 is a cross-sectional view
showing a state in which the microphone-side connector is inserted into the electronic device
side connector, and FIG. 12 is a cross-sectional view showing the state in which the microphoneside connector is attached to the electronic device side connector. FIG. 13 is a perspective view
showing the microphone side connector positioned above the electronic device side connector,
FIG. 14 is a view as viewed from the arrow A in FIG. 13, and FIG. 15 is a state where the
microphone side connector is attached to the electronic device side connector And FIG. 16 is a
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view on arrow A of FIG.
[0008]
As shown in FIG. 1, in the present embodiment, the electronic device is a video camera 100, and
has a case 102 constituting an exterior. In the present specification, left and right refer to the
video camera 100 as viewed from the front, and the subject side in the optical axis direction of
the optical system is referred to as the front, and the image sensor side is referred to as the rear.
The case 102 has a width in the left-right direction, a height in the vertical direction larger than
the width, and a length in the front-rear direction larger than the height. The case 102 has a
front surface 102A and a rear surface 102B facing forward and backward, an upper surface
102C and a lower surface 102D facing upward and downward, and a left surface 102E and a
right surface 102F facing left and right. At the top of the front surface 102A of the case 102, a
lens barrel 106 in which a photographing optical system 104 is incorporated is provided facing
forward. Inside the case 102, an imaging device for capturing a subject image guided by the
imaging optical system 104, still image and moving image data of the subject image captured by
the imaging device, and a plurality of channels supplied from the microphone device 200 A
recording and reproducing unit for recording and reproducing the audio data (signal) of the
present invention on a recording medium such as a magnetic recording tape, a magnetic disk, or
an optical disk is accommodated. The recording and reproducing unit is provided with a driving
source such as a motor for moving a magnetic recording tape or rotating and driving a magnetic
disk or an optical disk. An electronic finder 108 for visually recognizing an object image captured
by the imaging device is provided at the upper portion of the rear surface 102B of the case 102.
A display 110 for displaying an object image or the like captured by the imaging device is
provided on the right side surface 102F of the case 102 so as to be openable and closable. On
the rear surface 102B, the left side surface 102E, and the right side surface 102F of the case
102, operation switches 103 such as a photographing start / stop switch and setting switches
103 for performing various settings are provided. The microphone device 200 picks up sound
and outputs a plurality of channels of audio signals, and the microphone device 200 is
configured to be detachably mounted to the video camera 100. In the present embodiment, the
microphone side connector 40 is provided at the lower end of the microphone device 200, and
the microphone side connector 40 can be engaged with the electronic device side connector 10
provided on the upper surface 102C of the case 102 of the video camera 100. To connect the
microphone device 200 to the video camera 100.
The electronic device connector 10 is disposed in the housing recess 112 provided on the upper
surface 102 C of the case 102, and the housing recess 112 is configured to be opened and closed
by the lid 114.
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[0009]
First, the electronic device side connector 10 will be described. As shown in FIGS. 2 and 3, the
electronic device side connector 10 includes an inner member 12 integrally molded using a
synthetic resin material, and an outer member 14 formed by bending a steel plate, and the inner
member 12. Is fitted and fixed to the inner lower portion of the outer member 14. The outer
member 14 includes a bottom plate portion 14A, side plate portions 14B rising from both sides
of the bottom plate portion 14A, and a pair of upper plate portions 14C bent in a direction to
face each other from the upper end of the side plate portion 14B. The electronic device side
connector 10 includes a contact piece 16 for power supply or signal transmission, a pair of
locking plates 20, a guide groove 18 formed between a pair of opposing locking plates 20, and
each locking plate And a space 22 provided to face the lower surface of the space 20. The pair of
locking plates 20 is formed by a pair of upper plates 14C, which extend in the same plane and
their edges face each other. The guide groove 18 is formed to extend between the edges of the
pair of locking plates 20 facing each other in a direction perpendicular to the opposite direction,
and both ends in the extending direction are open. At the edges of the locking plates 20 facing
each other, a first recess 2002 (or a notch 2002 in which the locking plates 20 are cut away)
which is recessed in the direction in which the edges of the locking plates 20 facing each other
are separated; The first convex portion 2004 projecting in the direction in which the edges of the
locking plates 20 facing each other approach, the second recess 2006 in which the edges of the
locking plates 20 facing each other are recessed in the direction away from each other The
second projections 2008 which project in the direction in which the edge of the plate 20
approaches are provided in the order in which the guide grooves 18 extend. The tip end portion
of each first convex portion 2004 and the tip end portion of each second convex portion 2008
extend linearly in parallel with the extending direction of the guide groove 18. As shown in FIG.
4A, the first convex portion 2004 is configured such that a convex portion portion 2004A having
a small projecting dimension and a convex portion 2004B having a large projecting dimension
are arranged in the extending direction of the guide groove 18, The two convex portions 2008
are formed to have the same projecting dimension as the convex portion 2004B. The space 22 is
a space into which the microphone connector 40 (see FIG. 6) is inserted in the depth direction of
the housing recess 112 and then moved in the direction orthogonal to the depth direction. It is a
space above the inner member 12 inside the both side plate portions 14B. When the microphone
connector 40 is attached to the electronic device connector 10 for convenience in the description
of the embodiment, the direction in which the microphone connector 40 is inserted into the
space 22 through the guide groove 18 (the depth direction of the housing recess 112) is set.
After inserting the microphone connector 40 into the space 22, the insertion direction is moved
in the space 22 in the direction perpendicular to the depth direction of the accommodation
recess 112, ie, the extension of the guide groove 18 The direction is referred to as the mounting
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direction, the reverse direction of the insertion direction is referred to as the removal direction,
and the reverse direction of the mounting direction is referred to as the removal direction.
At the location of the electronic device side connector 10 forming the bottom of the space 22,
that is, the location under the first recess 2002 and the first protrusion 2004 at the location of
the inner member 12, they face each other in the width direction of the guide groove 18. A pair
of connector side guide surfaces 24 extending in the mounting direction is provided. The pair of
connector-side guide surfaces 24 positions the microphone-side connector 40 in the direction
orthogonal to the extending direction of the guide groove 18, that is, in the width direction of the
guide groove 18.
[0010]
As shown in FIG. 3, a plurality of contact pieces 16 of the electronic device side connector 10 are
provided at the bottom of the space 22 at a position of the inner member 12 between the pair of
connector side guide surfaces 24. More specifically, at the location between the pair of connector
side guide surfaces 24 at the location of the inner member 12 forming the bottom of the space
22, a bottom surface 1202 and an inclined surface 1204 gradually rising from the end of the
bottom surface 1202 And a flat contact piece attachment surface 1206 extending in parallel with
the bottom surface 1202 from the end of the inclined surface 1204, and the bottom surface
1202, the inclined surface 1204, and the contact piece attachment surface 1206 extend along
the mounting direction. It is arranged in order. In addition, a flat intermediate surface 1207
parallel to the bottom surface 1202 is provided at the inner member 12 below the second
concave portion 2006 and the second convex portion 2008, and this intermediate surface 1207
corresponds to the first concave portion 2002 and the first convex portion 2004. And extend to
the location of the inner member 12 along the side plate portion 14B. In the present
embodiment, when the microphone connector 40 is inserted into the space 22, the distal end
surface 5006 (see FIG. 6) of the microphone connector 40 is brought into contact with the
intermediate surface 1207, whereby the microphone in the space 22 is obtained. The position of
the side connector 40 in the insertion direction is regulated, in other words, positioned. The
plurality of contact pieces 16 of the electronic device side connector 10 are spaced from each
other at a portion of the boundary between the inclined surface 1204 and the contact piece
attachment surface 1206 at the contact piece attachment surface 1206 spaced in the mounting
direction. The guide groove 18 is disposed in line along the width direction of the guide groove
18.
[0011]
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The plurality of contact pieces 16 of the electronic device side connector 10 will be described in
detail. As shown in FIG. 5F, in the case, a plurality of strip-shaped lead wires 15 made of narrow
and elongated metal plate material And each contact piece 16 is constituted by a portion of the
lead wire 15. One end of the plurality of lead wires 15 is exposed above the contact piece
attachment surface 1206 through the opening and disposed as the contact piece 16, and as
shown in FIG. 4A, each contact piece 16 has the longitudinal direction in the mounting direction
And extend in a straight line. As shown in FIG. 4A, the plurality of contact pieces 16 of the
electronic device side connector 10 are arranged so that the end in the mounting direction is
positioned on a straight line in the width direction of the guide groove 18, and the plurality of
contact pieces Of the pieces 16, the ground contact piece 1602 connected to the ground
potential is formed to have a large dimension in the longitudinal direction as compared with the
other signal contact pieces 1604, and the end of the ground contact piece 1602 in the removal
direction is the other It protrudes from the end of the signal contact piece 1604. The layout
(arrangement) of each of the contact pieces 1602 and 1604 is such that, when the microphone
side connector 40 is attached to the electronic device side connector 10, as shown in FIG. The
ground contact piece 4802 connected to the potential is connected to the ground contact piece
1602 of the electronic device side connector 10 prior to the other signal contact piece 4804 to
ground the reference potential of the microphone device 200 and the video camera 100 first.
While being made to be less susceptible to the influence of electrostatic noise by setting the
potential, this is done for the purpose of stabilizing the operations of the microphone device 200
and the video camera 100. Further, in the present embodiment, two ground contact pieces 1602
are provided on both sides in the width direction of the guide grooves 18 of the plurality of
contact pieces 16. The layout (arrangement) of the contact pieces 1602 and 1604 is such that
even if the microphone connector 40 is inserted at an angle with respect to the extending
direction of the guide groove 18, the ground contact pieces on both sides in the width direction
The reference potential of the microphone device 200 and the video camera 100 can be
increased by contacting any one of the ground contacts 4802 (see FIG. 6) of the microphone side
connector 40 corresponding to the ground contacts 1602 with one of the terminals 1602. This is
done for the purpose of ensuring the ground potential, making the circuit less susceptible to
electrostatic noise, and further stabilizing the operations of the microphone device 200 and the
video camera 100.
Further, as shown in FIG. 5F, the portions of the lead wire 15 excluding the contact pieces 16 are
disposed inside the inner member 12, and the other end of the lead wire 15 is an end of the
inner member 12 in the mounting direction. It is guided into the hole 1208 opened at As shown
in FIGS. 4C, 5E, and 5F, the bottom of the inner member 12 and the bottom plate 14A of the
outer member 14 are provided with a notch 1402 so as to communicate with the hole 1208, As
shown in FIG. 12, the connection end 152 of the flexible substrate 150 provided in the video
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camera 100 is inserted into the hole 1208 through the notch 1402, and the connection end 152
is the other end of each contact piece 16 in the hole 1208. The connection end 152 is held
between each other end and the wall surface constituting the hole 1208 by the elasticity of the
other end. As a result, an electric signal for driving the microphone device 200 is supplied to
each contact piece 16 from the electronic circuit in the video camera 100 through the flexible
substrate 150, or the electronic circuit in the video camera 100 from each contact piece 16. The
microphone device 200 is configured to be supplied with an electrical signal (audio signal).
Under the present circumstances, as shown in FIG. 12, when the bottom plate part 14A of the
outer side member 14 is attached to the bottom face of the recessed part 112 of the video
camera 100, since the outer side member 14 is provided with the notch 1402, the flexible
substrate 150 is provided. Can be bent in the notch 1402 and guided to the inside of the video
camera 100. Therefore, when viewed from above, the flexible substrate 150 is positioned inside
the contour of the outer member 14, that is, inside the contour of the electronic device connector
10, and the flexible substrate 150 is pulled outward of the electronic device connector 10. This is
advantageous in reducing the space required to attach the electronic device side connector 10
without the need for securing a space for the connection. In FIG. 5F, reference numeral 1211
denotes a positioning boss projecting from the bottom surface of the outer member 14, and this
boss 1211 is engaged with a hole provided on the bottom surface of the housing recess 112 of
the video camera 100. Thus, the positioning of the electronic device side connector 10 is
performed.
[0012]
In this embodiment, as shown in FIG. 3, the inclined surface 1204 is composed of an inclined
surface 1204A corresponding to the contact piece 1602 connected to the ground potential and
an inclined surface 1204B corresponding to the other contact piece 1604. A step is formed
between the inclined surface 1204A and the inclined surface 1204B. This accommodates the
insertion hole 1203A for inserting a screw for attaching the electronic device side connector 10
to the bottom of the concave portion 112 of the imaging device 100 at the bottom 1202 in the
vicinity of the inclined surface 1204B, and the head of the screw. Since the concave portion
1203B is formed, the inclined surface 1204B is formed to be shifted in the mounting direction as
compared with the inclined surface 1204A while avoiding the concave portion 1203B. The
inclined surface 1204 has a function of guiding the contact piece 48 of the microphone
connector 40 smoothly. The microphone side connector 40 is provided with each contact piece
16 at the location of the contact piece attachment surface 1206 spaced in the mounting direction
from the portion of the boundary between the inclined surface 1204 and the contact piece
attachment surface 1206. Is moved into the mounting direction by the contact piece 48 of the
microphone connector 40 slidingly contacting the contact piece attachment surface 1206 by the
distance, the contact piece 48 of the microphone connector 40 is moved. Is in contact with the
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contact piece 16 in a stable state, and hence the removal direction of each contact piece 16 from
the portion of the boundary between the inclined surface 1204 and the contact piece attachment
surface 1206 on the contact piece attachment surface 1206 The portion up to the end portion
functions as a sliding surface of the contact piece 48 of the microphone side connector 40.
[0013]
Further, the contact piece 16 of the electronic device side connector 10 is provided at a position
between the pair of connector side guide surfaces 24 at the position of the inner member 12
forming the bottom of the space 22, specifically below the intermediate surface 1207. A cover 26
is provided so as to be movable in the mounting direction. And the spring (not shown) which
biases the cover 26 to the closed position (FIG. 2, FIG. 11) which covers the contact piece 16 of
the electronic device side connector 10 is provided, and the cover 26 moves at the time of the
said installation direction. It is configured to be moved to the open position (FIGS. 3 and 12) in
which the shaft piece 50 releases the contact piece 16 by contacting the rising surface 60 (see
FIG. 6) which is a portion of the shaft portion 50 of the microphone connector 40. It is done.
Further, an abutment surface 1210 is formed extending along the width direction of the guide
groove 18 at the end of the intermediate surface 1207 in the removal direction. In the present
embodiment, when the microphone side connector 40 is inserted into the space portion 22, the
rising surface 60 (see FIG. 6) of the microphone side connector 40 is brought into contact with
the contact surface 1210. The position in the mounting direction of the microphone side
connector 40 is regulated, in other words, positioned.
[0014]
As shown in FIGS. 2 and 3, concave portions 1220 extending along the connector side guide
surface 24 are provided on both sides in the width direction of the guide groove 18 in the
bottom surface 1202 of the inner member 12. At the time of insertion, the tip of the guide wall
58 (see FIG. 6) is accommodated in the recess 1220. The end of the recess 1220 in the removal
direction is provided with a wall 1222 that closes the end of the recess 1220 in the removal
direction, and the upper surface of the wall 1220 is flush with the bottom surface 1202. Thus,
even if the axial portion 50 (see FIG. 6) of the microphone side connector 40 is inserted in the
mounting direction from the location facing the removal direction of the electronic device side
connector 10, the guide wall 58 of the axial portion 50 is the wall portion 1222 And the
insertion in the mounting direction is prohibited. Therefore, an erroneous operation of inserting
the shaft 50 of the microphone connector 40 in the mounting direction from the location facing
the removal direction of the electronic device connector 10 can be prohibited. Thus, only the
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operation of inserting the microphone connector 40 into the space 22 from between the guide
grooves 18 can be permitted when the microphone connector 40 is attached to the electronic
device connector 10, so that the microphone device 200 can be used. It is configured such that
the operation method for mounting the video camera 100 on the video camera 100 can be
limited to one and usability can be improved.
[0015]
Next, the configuration of the microphone connector 40 will be described. As shown in FIG. 1, the
microphone device 200 has a microphone housing case 202, and the microphone housing case
202 has a microphone housing portion 204 and a mounting portion 206 provided at the lower
portion thereof. A cylindrical shaft member 42 projects downward from the lower surface of the
mounting portion 206, and the cylindrical shaft member 42 is provided in the mounting portion
206. As shown in FIG. 6, at the tip (lower end) in the longitudinal direction of the shaft member
42, a shaft portion 50 having a prismatic shape smaller in cross section than the shaft member
42 and coaxially extending with the shaft member 42 is provided The microphone connector 40
is provided on the shaft 50. The shaft 50 is made of a nonconductive synthetic resin material.
The side surfaces on both sides of the tip portion of the shaft portion 50 have dimensions
between the tips of the pair of first convex portions 2004 forming the innermost edge of the
guide groove 18 so that they can be smoothly inserted into and removed from the guide groove
18 and A dimension slightly smaller than the dimension between the tips of the pair of second
convex portions 2008 is formed. A first locking piece 5002 is inserted into the space 22 from the
first recess 2002 of the electronic device side connector 10 on the side surface on both sides of
the tip of the shaft 50 and is movable in the space 22 along the mounting direction. And a
second locking piece 5004 inserted into the space 22 from the second recess 2006 of the
electronic device side connector 10 and movable along the mounting direction in the space 22 at
a distance from each other. There is. In the present embodiment, the extension length of the first
and second locking pieces 5002 and 5004 in the mounting direction is about one third of the
dimension of the shaft 50 in the mounting direction.
[0016]
As shown in FIGS. 8 to 10, spring pieces 52 respectively project in a curved shape at positions
between the first locking piece 5002 and the second locking piece 5004 on the side surfaces on
both sides of the tip portion of the shaft portion 50. The spring piece 52 is disposed by
incorporating a thin plate-like spring steel plate into the inside of the shaft portion 50. The
spring piece 52 is provided at a position displaced closer to the base of the shaft portion 50 than
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the first locking piece 5002 and the second locking piece 5004. The first locking piece 5002 is a
first concave portion 2002. And the second locking piece 5004 is positioned in the first recess
2002 with the second locking piece 5004 positioned in the space 22 through the second recess
2004, and the first locking piece in the space 22. When the second locking piece 5004 moves
toward the lower surface of the first convex portion 2004 and the second convex portion 2008,
the second locking piece 5004 elastically contacts the tip of the first convex portion 2004, and
the first locking piece 5002 and the second The locking piece 5004 is positioned in the second
recess 2008 while being positioned on the lower surface of the first protrusion 2004 and the
second protrusion 2008, and configured to give a click feeling to the user who operates the
microphone device 200. There is. In this embodiment, the first convex portion 5002 and the
second convex portion 5004 move in the mounting direction in the space portion 22 and are
positioned on the lower surfaces of the first convex portion 2004 and the second convex portion
2008 in the first convex state. The end of the second recess 2006 closer to the portion 2004 is
resiliently engaged, and the microphone device 200 is temporarily fixed at this position.
[0017]
In addition, a tip end surface 5006 is provided at the tip of the shaft 50, and the tip surface 5006
abuts on the intermediate surface 1207 of the electronic device side connector 10 when the
shaft 50 is inserted into the space 22. In order to regulate the position of the microphone
connector 40 in the insertion direction in the above case, in other words, positioning is
performed. In the present embodiment, a pair of guide walls 58 are formed to project in the
longitudinal direction (the insertion direction) of the shaft 50 so as to face each other from the
base ends of the first locking pieces 5002 on both sides. The outer side surface is formed as a
microphone side guide surface 54 which can slide on the pair of connector side guide surfaces
24, and when the microphone side guide surface 54 contacts the connector side guide surface
24, the guide groove 18 in the space 22 is formed. Positioning of the microphone connector 40
in the width direction is performed.
[0018]
In the present embodiment, when the shaft 50 of the microphone connector 40 is inserted into
the space 22 of the electronic device connector 10, the direction along the mounting direction of
the shaft 50 with respect to the space 22 is reversed. In this case, the pair of guide walls 58 of
the microphone connector 40 abuts on the intermediate surface 1207 of the electronic device
connector 10, and the insertion in the reverse direction is prohibited. A flat contact piece
attachment surface 56 parallel to the end surface 5002 is provided at a position between the
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bases of the pair of guide walls 58 at the tip of the shaft 50, and the contact piece attachment
surface 56 is more distal than the end surface 5006. Between the contact piece attachment
surface 56 and the end surface 5006, an erected surface 60 perpendicular to the surfaces 56,
5006 is formed. The plurality of contact pieces 48 of the microphone-side connector 40 are
provided on the contact piece attachment surface 56, and are arranged in a straight line at
intervals in the direction of the pair of guide walls 58. The rising surface 60 is configured to
contact the end face of the cover 26 when the shaft 50 is inserted into the space 22 of the
electronic device side connector 10 and moved in the mounting direction. Also, the first locking
piece 5002 and the second locking piece 5004 become the first convex portions by the shaft
portion 50 being inserted into the space portion 22 of the electronic device side connector 10
and being moved in the mounting direction in the space portion 22. In this state, the plurality of
contact pieces 48 of the microphone side connector 40 and the plurality of contact pieces 16 of
the electronic device side connector 10 are in contact with each other. Then, a power supply and
an electric signal for driving the microphone device 200 are supplied from the video camera 100
to the electronic circuit in the microphone device 200 via the contact pieces 16 and 48, or via
the contact pieces 16 and 48. An electric signal (audio signal) from an electronic circuit in the
microphone device 200 is configured to be supplied to the video camera 100.
[0019]
As shown in FIG. 15, an annular operation ring 44 is provided rotatably at the 50 shaft portions
above the locking plate 20 in a state where the tip of the shaft portion 50 is inserted into the
guide groove 18. In the present embodiment, a groove is provided at a position between the shaft
member 42 and the shaft portion 50, and the operation ring 44 is rotatably disposed in the
groove. On both sides of the shaft portion 50, there are provided tightening blocks 70 which are
moved in the longitudinal direction of the shaft portion 50 by the rotation operation of the
operation ring 44, that is, moved in the vertical direction. The fastening block 70 is provided at
the lower end of the vertical plate portion 7002 extending in parallel with the extension direction
of the shaft portion 50, and at the lower end of the vertical plate portion 7002, and the first
locking piece 5002 and the second locking piece 5004 have a first convex shape. In contact with
the lower surfaces of the first and second protrusions 2004 and 2008 while in contact with the
lower surfaces of the portion 2004 and the second protrusion 2008 in cooperation with the first
locking piece 5002 and the second locking piece 5004 A tightening portion 7004 for tightening
and fixing the first convex portion 2004 and the second convex portion 2008 and an extension
of the guide groove 18 of the shaft portion 50 by being inserted into the second concave portion
2006 between the first convex portion 2004 and the second convex portion 2008 And a
movement prevention unit 7006 for preventing movement along the direction. The fastening
portion 7004 has a rectangular parallelepiped shape having a long side in the extending
direction of the guide groove 18, and is formed to have a larger cross section than the vertical
01-05-2019
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plate portion 7002. The movement preventing portion 7006 is formed so as to expand in a
rectangular parallelepiped shape from the lower surface of the tightening portion 7004 and has
a dimension inserted between the first convex portion 2004 and the second convex portion
2008, that is, a dimension inserted in the second concave portion 2006 It is done. In the
arrangement of the clamping block 70, for example, the vertical plate 7002 is inserted into the
recess provided in the shaft 50 so as to be movable only in the longitudinal direction of the shaft
50, and the female screw on the inner periphery of the clamping block 70 is A variety of
conventionally known mechanisms and structures are used, such as screwing on the external
threads of the outer surface of the portion 7002.
[0020]
Next, how to use the electronic device side connector 10 and the microphone side connector 40
will be described. When the microphone device 200 is attached to the video camera 100, the lid
114 is removed to expose the electronic device side connector 10 to the outside of the case 102.
Then, as shown in FIGS. 13 and 14, the tip end surface 5006 of the microphone connector 40 is
faced to the intermediate surface 1207 of the electronic device connector 10, and the first
locking piece 5002 of the microphone connector 40 is the electronic device connector. 10 and
the second locking piece 5004 of the microphone connector 40 to the second recess 2006 of the
electronic device connector 10, and in this state, the shaft 50 of the microphone connector 40
The microphone-side guide surfaces 54 on both sides of the microphone-side connector 40
contact the connector-side guide surface 24 so that the width direction of the guide groove 18 in
the space 22 is inserted. The microphone side connector 40 is positioned at By the insertion of
the microphone connector 40, as shown in FIG. 11, the first locking piece 5002 of the
microphone connector 40 is positioned in the space 22 through the first recess 2002, and the
second locking piece 5004 Is located in the space 22 through the second recess 2006, and the
tip surface 5006 of the microphone connector 40 abuts on the intermediate surface 1207 of the
electronic device connector 10, and the spring piece 52 of the microphone connector 40 It is
located in the recess 2002.
[0021]
Next, as shown in FIG. 12, when the shaft portion 50 is moved in the mounting direction, the
spring piece 52 elastically contacts the tip of the first convex portion 2004 along with the
movement of the shaft portion 50 in the mounting direction. It is slightly immersed in the side
surface of the portion 50 and moves integrally with the shaft portion 50 while elastically
contacting the tip of the first convex portion 2004. After that, with the first locking piece 5002
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and the second locking piece 5004 positioned on the lower surface of the first convex portion
2004 and the second convex portion 2008, the spring piece 52 projects into the second concave
portion 2006, and the microphone side connector 40 The rising surface 60 abuts on the contact
surface 1210 of the electronic device connector 10, and positioning in the mounting direction is
performed. In the present embodiment, with the first locking piece 5002 and the second locking
piece 5004 positioned on the lower surfaces of the first convex portion 2004 and the second
convex portion 2008, the spring piece 52 is closer to the first convex portion 2004. The end of
the second recess 2006 resiliently contacts. Then, the cover 26 of the electronic device side
connector 10 is moved to the open position by the rising surface 60 of the microphone side
connector 40 by the movement of the shaft portion 50 in the mounting direction, and each
contact piece 48 of the microphone side connector 40 Are in sliding contact with the inclined
surface 1204 and the contact piece mounting surface 1206, respectively, and then connected to
the contact pieces 16 of the electronic device side connector 10 for electrical conduction. Then,
when the operation ring 44 is rotated, the tightening block 70 is lowered, and the movement
preventing portion 7006 is inserted into the first recess 2006 between the first convex portion
2004 and the second convex portion 2008, and the guide of the shaft portion 50 Movement of
the groove 18 along the extension direction is blocked. Further, as the tightening block 70 is
lowered, as shown in FIGS. 15 and 16, the first locking piece 5002 and the second locking piece
5004 abut on the lower surfaces of the first convex portion 2004 and the second convex portion
2008. At the same time, the lower surface of the tightening portion 7004 abuts on the upper
surfaces of the first convex portion 2004 and the second convex portion 2008, and cooperates
with the first locking piece 5002 and the second locking piece 5004 to form the first convex
portion 2004 and the The two convex portions 2008 are tightened and fixed, and the
microphone device 200 is attached to the video camera 100. As a result, it is possible to
simultaneously perform sound collection by the microphone device 200 and photographing by
the video camera 100. The audio signal generated by the microphone device 200 is transmitted
from the microphone connector 40 to the video camera 100 via the electronic device connector
10, and the video camera 100 performs necessary signal processing on the transmitted imaging
signal. Do.
[0022]
When removing the microphone device 200 from the video camera 100, the operation ring 44 is
rotated to raise the tightening block 70, and the movement preventing portion 7006 is extracted
upward from the first recess 2006, and the tightening portion 7004 is It is raised, and the
clamping and fixing of the first convex portion 2004 and the second convex portion 2008 by the
cooperation with the first locking piece 5002 and the second locking piece 5004 are released.
Next, when the shaft portion 50 of the microphone connector 40 is moved in the removal
direction, the first locking piece 5002 and the second locking piece 5004 are moved with the
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14
space portion 22 positioned, and the first locking piece 5002 is The second locking piece 5004 is
positioned below the second recess 2004, and the spring piece 52 resiliently contacts the tip of
the first protrusion from the second recess, and the side surface of the shaft 50 is located. , And
is moved integrally with the shaft 50 while being in elastic contact with the tip of the first convex
portion 2004 and protrudes into the first concave portion 2002. The movement of the shaft 50
in the removal direction separates the contact pieces 48 of the microphone connector 40 and the
contact pieces 16 of the electronic device connector 10 to release the electrical conduction, and
the cover 26 is released from the open position. It is returned to the closed position. In this state,
when the shaft 50 of the microphone connector 40 is moved in the removal direction, the first
locking piece 5002 of the microphone connector 40 passes through the first recess 2002, and
the second locking piece 5004 passes through the second recess 2006. Then, the microphone
unit 200 is moved upward from the space 22, the shaft unit 50 of the microphone connector 40
is separated from the electronic device connector 10, and the microphone device 200 is removed
from the video camera 100.
[0023]
According to such a configuration, when the microphone side connector 40 is attached to the
electronic device side connector 10, the first locking piece 5002 of the microphone side
connector 40 passes through the first concave portion 2002, and the second locking piece 5004
is After being positioned in the space portion 22 through the second concave portion 2006, the
first locking piece 5002 is positioned on the lower surface of the first convex portion 2004 by
moving the shaft portion 50 of the microphone side connector 40 in the mounting direction, The
plurality of contact pieces 48 of the microphone connector 40 contact the plurality of contact
pieces 16 of the electronic device connector 10 with the second locking piece 5004 positioned
on the lower surface of the second protrusion 2008. Here, in consideration of the dimension S of
the mounting direction required for mounting the microphone connector 40 to the electronic
device connector 10, in the present embodiment, the size of the first and second locking pieces
5002 and 5004 is not limited. Since the extension length in the mounting direction is about 1/3
of the dimension in the mounting direction of the shaft 50, the dimension S is the dimension
(dimension of the shaft 50) L of the microphone side connector 40 along the mounting direction
And the dimension L / 3 of the mounting direction of the first and second locking pieces 5002
and 5004 in the mounting direction, that is, the dimension S is about (L + L / 3). Therefore, the
space necessary for mounting the microphone connector 40 on the electronic device connector
10 is defined by the dimensions of the microphone connector 40 along the mounting direction
and the dimensions of the second locking piece 5004 in the mounting direction. It will be a sum.
On the other hand, when the microphone side connector 40 is attached from the outside of the
outline of the electronic device side connector 10, the dimension S is required to be 2 L which is
twice the dimension L of the microphone side connector 40 along the attachment direction.
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Become. Therefore, in the present embodiment, it is not necessary to secure a large space for
mounting the microphone side connector 40 around the electronic device side connector 10 as
compared with such a case, and the video camera 100 and the microphone device 200 can be
small. This is extremely advantageous in improving the design of the video camera 100 and the
microphone device 200. Further, by rotating the operation ring 44, the tightening portion 7004
abuts on the upper surfaces of the first convex portion 2004 and the second convex portion
2008 and cooperates with the first locking piece 5002 and the second locking piece 5004. The
first protrusion 2004 and the second protrusion 2008 are tightened and fixed, and the
movement preventing portion 7006 is inserted into the first recess 2006 between the first
protrusion 2004 and the second protrusion 2008 and the guide groove 18 of the shaft 50 is
formed. Since the movement of the microphone along the extension direction is blocked, the
microphone connector 40 can be firmly attached to the electronic device connector 10.
Therefore, when an external force along the extension direction of the guide groove 18 is applied
to the microphone connector 40, it is advantageous in reliably preventing the microphone
connector 40 from falling off the electronic device connector 10.
[0024]
Further, the first convex portion 2004 of the electronic device side connector 10 which is locked
to the first locking piece 2004 of the microphone side connector 40 and held by the first locking
piece 2004, that is, for fixing the microphone side connector 40. Since the first convex portion
2004 is shared as a member that generates a click feeling when the spring pieces 52 of the
microphone side connector 40 elastically contact, an increase in the number of parts can be
suppressed, which is advantageous in cost reduction. Further, in a state in which the contact
piece 48 of the microphone side connector 40 and the contact piece 16 of the electronic device
side connector 10 are connected, the spring piece 52 is in elastic contact with the end of the first
convex portion 2004. Since the temporary fixing is performed, the first convex portion 2004 for
fixing the microphone side connector 40 can be shared as a member for temporarily fixing the
microphone side connector 40, the increase in the number of parts can be suppressed, and the
cost can be reduced. Be advantageous.
[0025]
Next, the microphone device 200 which is the main part of the present invention will be
described. FIG. 17 is a block diagram showing the configuration of the circuit portion of the
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microphone device 200. As shown in FIG. 18A is a plan view of the microphone device 200, FIG.
18B is a view taken in the direction of arrow X in FIG. 18A, and FIG. 18C is a view taken in the
direction of arrow Y in FIG. FIG. 19 is a cross-sectional view taken along the line AA of FIG. 18
(B), and FIG. 20 is a cross-sectional view taken along the line BB of FIG. 18 (C). FIG. 21 is a
perspective view of the holder 92, FIG. 22 (A) is a front view of the connector 94, and FIG.
[0026]
As shown in FIG. 17, the microphone device 200 includes three microphones: a microphone 80A
for front sound collection, a microphone 80B for left and right side sound collection, and a
microphone 80C for rear sound collection, and these three microphones Signal processing
circuits (four-channel matrix circuit) 82 that process three audio signals supplied from 80A to
80C and output as a plurality of audio signals in this embodiment, four channels of audio signals
S1 to S4, and Amplifiers 84A to 84D which separately amplify the audio signals S1 to S4 and a
power supply circuit 86 which performs voltage adjustment and voltage stabilization of the
power supplied from the video camera 100 and supplies the signal processing circuit 82 and the
amplifiers 84A to 84D. And. Further, the signal processing circuit 82, the amplifiers 84A to 84D,
and the power supply circuit 86 are constituted by electronic components mounted on a single
substrate 88 (FIG. 19, FIG. 20), and the three microphones 80A, 80B, 80C are not shown. The
leads are electrically connected to the amplifiers 84A to 84D through the conductive pattern of
the substrate 88. The output ends of the amplifiers 84A to 84D and the input end of the power
supply circuit 86 are electrically connected to the contact pieces 48 of the microphone connector
40 described above. That is, by mounting the microphone side connector 40 to the electronic
device side connector 10 of the video camera 100, each contact piece 48 of the microphone side
connector 40 and each contact piece 16 of the electronic device side connector 10 are
electrically connected, The audio signals S1 to S4 and the power supply are supplied through the
contact pieces 48 and 16.
[0027]
As shown in FIGS. 18, 19 and 20, the microphone device 200 transmits and receives electrical
signals between the microphone housing case 202, the three microphones 80A, 80B and 80C,
and the three microphones 80A, 80B and 80C. And a substrate 88 for performing the The
microphone housing case 202 has a microphone housing portion 204 having an elongated
housing space 208 for housing a microphone. The microphone housing portion 204 has a
cylindrical housing wall 210, and the housing space 208 is cylindrically defined in the housing
wall 210. Both ends in the longitudinal direction of the housing wall 210 are formed as openings
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212 which open the housing space 208. In addition, a plurality of rectangular openings 214 for
opening the housing space 208 are formed on the left and right sides of the housing wall 210
located at the middle of the housing space 208 in the longitudinal direction. At each of the
openings 212 at both ends in the longitudinal direction of the housing wall 210, a cover 216 is
attached, which allows passage of sound and prevents passage of dust. In addition, a cover 218 is
mounted on the outside of the housing wall 210 to allow the passage of sound and block the
passage of dust. The cover 216 is, for example, a ring attached to each opening 212, a net
attached to the inside of the ring, and a thin plate-like sponge attached to a surface of the net
facing the housing space 208. And consists of. In addition, the cover 218 has, for example, a
cylindrical frame whose lower portion is opened along the longitudinal direction, a plurality of
slits formed vertically extending at a plurality of places spaced in the longitudinal direction of the
frame, and the frame The cover 218 is attached from the axial direction of the housing wall 210,
for example. Be done.
[0028]
The substrate 88 is formed in a rectangular shape having a width and a dimension larger than
the width. The substrate 88 is disposed at the bottom of the housing space 208 with its long side
direction (longitudinal direction) directed to the length direction of the housing space 208. The
substrate 88 extends the entire length of the accommodation space 208 in the longitudinal
direction. The size of the substrate 88 is, for example, 1 mm in thickness, 16 mm in width, and
56 mm in length.
[0029]
The three microphones 80 </ b> A, 80 </ b> B and 80 </ b> C are spaced apart in the
longitudinal direction of the housing space 208. More specifically, the microphone 80A for front
sound collection is disposed to face one side (forward) of the longitudinal direction of the
housing space 208, and the microphone 80C for rear sound pickup is the other one in the
longitudinal direction of the housing space 208. The microphones 80B for left and right side
sound collection are disposed facing the back (right and left sides) between the microphones 80A
and 80C, which are orthogonal to the length direction of the accommodation space 208. There is.
Each microphone 80A, 80B, 80C has a cylindrical shape, and its size is, for example, 30 mm in
diameter. The three microphones 80A, 80B, and 80C are separated from and supported by both
the housing wall 210 and the substrate 88 by a support member 90 disposed inside the housing
space 208. The support member 90 is configured of a holder 92 on which the three microphones
80A, 80B, and 80C are held, and a connector 94 (see FIG. 22) that connects the housing wall 210
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and the holder 92. As shown in FIG. 21, the holding body 92 has a plurality of cylindrical wallshaped holding walls in which three microphones 80A, 80B, 80C are fitted and held at three
places having an elongated shape and spaced in the length direction. 9202 and a narrow platelike connecting wall 9204 that connects between the holding walls 9202. As shown in FIG. 22,
the connecting body 94 is configured to connect the housing wall 210 and a plurality of places
spaced in the length direction of the holder 92, and in the present embodiment, the housing wall
210 and the holder It is comprised so that it may connect with the both ends of 92 length
directions. The coupling body 94 is formed in a rectangular frame shape of an elastically
deformable material, such as silicon rubber. The connector 94 includes, for example, a plurality
of bosses 9402 located inside and a plurality of bosses 9404 located outside, and the inner boss
9402 is a pin 9206 of the holder 92 as shown in FIG. And the outer boss 9404 is attached to the
pin 211 of the receiving wall 210, whereby the three microphones 80A, 80B, 80C are separated
from both the receiving wall 210 and the substrate 88 via the support member 90. Be supported.
[0030]
The attachment portion 206 has an upper portion 206A connected to the microphone housing
portion 204, and a lower portion 206B in which the shaft member 42 is accommodated. As
shown in FIGS. 19 and 20, the upper portion 206A and the lower portion 206B are anti-vibration
rubber. It is connected with 96 intervened. Further, the flange 4250 at the upper end of the shaft
member 42 is coupled to the groove 206C of the lower portion 206B, whereby the microphone
device 200 is turned in a horizontal plane to orient the microphone device 200 with the
microphone device 200 attached to the video camera 100. It is configured to be adjustable.
[0031]
According to the present embodiment, the microphone device 200 includes the microphone
housing case 2002, the three microphones 80A, 80B, and 80C, and the substrate 88, and the
microphone housing case 202 has the elongated housing space 208 for housing the microphone.
A microphone housing 204 is provided, and the substrate 88 has a width and a dimension larger
than the width, and the substrate 88 has its length directed to the length direction of the housing
space 208 and the bottom of the housing space 208 Because the three microphones 80A, 80B,
and 80C are disposed above the substrate 88 in the housing space 208, noise generated on the
video camera 100 side, for example, sound generated from the motor of the recording and
reproducing unit , Etc. Three microphones placed above the substrate 88 with the sound
insulation by the substrate 88 0A, 80B, less likely to be transmitted to 80C, which is
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advantageous in suppressing to a minimum the influence of the noise generated from the video
camera 100 side. In addition, since the three microphones 80A, 80B, and 80C are disposed above
the substrate 88 in the housing space 208, members that interfere with sound collection exist
around the microphones 80A, 80B, and 80C. Therefore, it is advantageous for sound collection
by each of the microphones 80A, 80B, and 80C to be performed in a well-balanced manner in all
directions and to improve the sound collection characteristic.
[0032]
In the present embodiment, although the case where the microphone device 200 has three
microphones 80A, 80B, and 80C has been described, it goes without saying that the number of
microphones may be two or four or more. Further, although the case where the electronic device
to which the microphone device 200 is attached is a video camera has been described in the
present embodiment, the electronic device to which the microphone device of the present
invention is attached is not limited thereto. Of course, it may be various electronic devices such
as a camera-equipped personal digital asterisk (PDA), a camera-equipped cellular phone, or
various imaging devices such as a digital still camera or a film camera.
[0033]
FIG. 1 is a perspective view of a video camera 100 according to a first embodiment as viewed
from the front. It is a perspective view which shows the state in which the shutter of the
electronic device side connector provided in the electronic device exists in the closed position. It
is a perspective view which shows the state in which the shutter of the electronic device side
connector provided in the electronic device exists in an open position. (A) is a plan view of the
connector on the electronic device side, (B) is a view on arrow B in (A), (C) is a view on arrow C in
(A), (D) is a view on arrow D in (A) It is. (E) is an E arrow view of FIG. 4 (D), (F) is an FF line
sectional view of (E). It is a perspective view of the microphone 80A, 80B, 80C side connector
provided in microphone 80A, 80B, 80C apparatus. It is a top view of microphone 80A, 80B, 80C
side connector. It is an arrow A view of FIG. It is B arrow line view of FIG. It is CC sectional view
taken on the line of FIG. It is sectional drawing which shows the state in which the microphone
80A, 80B, 80C side connector was inserted in the electronic device side connector. It is sectional
drawing which shows the state in which the microphone 80A, 80B, 80C side connector was
mounted ¦ worn with the electronic device side connector. It is a perspective view which shows
the state which positioned the microphone 80A, 80B, 80C side connector above the electronic
device side connector. It is A arrow line view of FIG. It is a perspective view which shows the
state in which the microphone 80A, 80B, 80C side connector was mounted ¦ worn with the
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electronic device side connector. It is an arrow A view of FIG. FIG. 7 is a block diagram showing
the configuration of the circuit part of the microphones 80A, 80B, and 80C device 200. (A) is a
plan view of the microphones 80A, 80B, and 80C apparatus 200, (B) is a view as viewed from the
arrow X of (A), and (C) is a view as viewed from the arrow Y of (A). It is AA line sectional drawing
of FIG.18 (B). It is BB sectional drawing of FIG.18 (C). 10 is a perspective view of a holder 92. FIG.
(A) is various views of the connection body 94, (B) is a view on arrow B of (A).
Explanation of sign
[0034]
100: video camera, 200: microphone device, 202: microphone housing case, 204: microphone
housing portion, 208: housing space, 80A, 80B, 80C: microphone, 88: substrate.
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