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JPS5622874

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DESCRIPTION JPS5622874
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external view showing a microphone unit of
a cine camera having a simultaneous recording mechanism to which the basic example of the
present invention is applied, FIG. 2 is an exploded view showing the configuration of the
microphone unit, FIG. The figure is an exploded view showing the configuration of the head case
assembly of the same microphone unit, FIG. 4 is a side sectional view showing the configuration
of the microphone assembly of the same microphone unit, and FIGS. 5a, 5b and 5c are the frames
of the same microphone assembly. 6A and 6B are exploded views showing the configuration of
the microphone unit of the microphone assembly, and FIGS. 7a and 7b are front views and a
front view showing the shape of the weight of the microphone unit, respectively. Fig. 8a, b is a
side view showing a partial cross section. C is a top view showing the shape of the first unit cap
of the same microphone unit, a side view and a side view showing a partial cross section, and
FIGS. 9 to 11 are perspective views showing the shape of the elastic member and Is it mounted?
FIG. 12a and 12b are a side sectional view and a front view showing an embodiment of a
vibration isolation mechanism of a microphone according to the present invention, and FIG. 13 is
an example of formation of an elastic member used in the same embodiment. It is the schematic
for demonstrating. {Circle over (4)} Microphone unit 12, support means, microphone assembly
bar 14 First mesh, support head case assembly 16, opening portion 17, head base, 18 ... recess,
19 ... attaching portion, 20 Pa · screws, 21, 21 ... connecting lines 22 ... connection electrode, 23
... head case, 24 to 26 ... Second to fourth mesh, 27 to 29 fifth to seventh mesh, 30 to 7 frames,
shadow to microphone unit 32, elastic member, wedge to through hole 34.35: Locking portion,
36. 37: Through hole, 38. 39: Through hole, 40: Microphone body, 41: Mounting portion, 42:
Weight, 43: sound collecting unit, 44: first unit cap, 45: first Unit cap 46, through hole 47, first
attachment portion 48, second attachment portion 49, cap portion 50, hanging portion 51, 51. · ·
························································································
· · · · · · · · · · · · · · · · · · Stoppers 30 'frame, nails microphone unit 32' elastic member.
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DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vibration
isolation mechanism of a microphone suitable for use in, for example, a tail recorder, a cine
camera having a simultaneous recording mechanism, and the like. Recently, cine cameras having
a so-called simultaneous recording mechanism capable of recording voice simultaneously with
shooting have become widespread. In such a cine camera, a microphone is attached to the end of
the rod-like support extending from the camera body, and is it possible to record the voice by the
microphone in synchronization with the creation of the cine camera? It is possible. By the way, as
described above, the motor built in the cine camera main body at the time of cine camera
operation only by attaching the microphone to the tip of the rod-like support both separated out
from the camera main body as described above. The mechanical vibration due to the same
rotation and the like is transmitted to the microphone through the rod-like support, which causes
a problem of deteriorating the S / N ratio. Moreover, this problem is the same as with the cine
camera as well as with the fNJ tape recorder and the like, and the movement of the motor 低 1 ')
J low motion adversely affects the built-in microphone. For this reason, various measures for
removing the vibration have been developed, for example, by wrapping the microphone with an
elastic buffer member, but none of them have been able to obtain a sufficient effect. Therefore, it
has a vibration-proofing effect sufficient to remove all the negative v due to the vibration to the
microphone conventionally, and can stably and reliably support the microphone, and can
sufficiently respond to the needs of the user. There is a strong demand for the development of
mechanisms. The present invention has been made based on the above-mentioned circumstances,
and it is possible to obtain a sufficient vibration isolation effect and to support the microphone
stably and reliably. In the following, a basic example in the case where the present invention is
applied to a cine camera provided with a simultaneous stuttering mechanism will be described
with reference to the drawings with reference to the drawings. In FIG. 1, a microphone unit is
attached to a cine camera body (not shown) via a support 12 in the form of a rondo antenna. As
shown in FIG. 2, this microphone $ 11 covers a cylindrical microphone assembly 13 with a first
mesh 14 formed in a cylindrical shape by a fine mesh member of a fine mesh, and a substantially
dome-shaped head case assembly thereon The head case assembly 15 is covered with a cover 15
and the opening 16 of the head case assembly 15 is closed with a ladder pace 17. Then, the
mounting portion 19 of the support 12 is fitted into the concave portion 18 formed on the back
surface of the hard case 17 described above, and the microphone portion 11 and the support bar
12 are deposited by tightening with the screw 20. .
Further, the connection line 21. 22 of the microphone assembly 13 is connected to the
connection electrode 22 formed in the mounting portion 19 of the support 12 through the notshown through hole penetrating the head base 17 Y. The connection electrode 22 is connected to
the microphone input terminal of the recording N path of the cine camera main body through a
connection line (not shown) inserted through the inside of the support 12. Here, FIG. 3 shows the
details of the above-mentioned head case anocentrily, and the head case has a cylindrical shape
and seven side faces are largely cut out by a large number of J-M (three places in the case
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shown). In the reference numeral 23, second to fourth meshes 24 to 26 formed in circular
shapes of different sizes respectively by mesh members having different mouth roughness are
accumulated and stored. Further, fifth to seventh menoches 27 to 29 formed in the shape of
hemispheres different in thickness from one another by mesh members different in the
roughness of the eyes are attached to one end portion of the head case 23 in an overlapping
manner. It will be FIG. 4 shows details of the lvJ microphone assembly IS, and the cylindrical
frame 30) (in the square, the microphone unit 31 is loosely inserted and suspended in the frame
30 by an elastic member 32 such as rubber). ing. As shown in FIGS. 5 (a), 5 (b) and 5 (c), the
frame 30 has a large number of through holes 33 on the side, and approximately 90 'threshold
distance locking portions 34. 35 are formed at both ends. Further, the locking portions 34 and
35 are formed by connecting the large diameter through holes 36 and 37 and the small diameter
through holes @ 38 and 39, respectively. Here, as shown in FIG. 6, the microphone unit 31
includes a microphone main body 40. A weight 42 having a mounting portion 4) for fully
supporting the rear side of the microphone main body 40, a first unit cap 44 for covering the
microphone main body 40 from the front, and the weight 42 from the rear surface The second
unit cap 45 that covers is the same as the second unit cap 45. As shown in FIG. 7A (a) I (b), which
is made of a metal material, the way 142 has a cylindrical shape and a through hole 46 is formed
in the central portion thereof. And, at one leak portion of the weight 42, attachment portions 41
are provided at intervals of approximately 90 °. The mounting portion 41 has a step in the form
of a one-sided crank, and a first mounting portion 47 and a second mounting portion 4a are
formed. Then, by fitting the rear peripheral side surface of the front-microphone main body 40
between the first attachment portions 41, the weight 42 and the microphone main body 40 are
attached.
At this time, the connection line 21.21 extending from the rear portion of the microphone body
40 is passed through the through hole 46 of the weight 42 and led out rearward of the weight
42. FIG. 7 (b) is a cross-sectional view of a portion indicated by an alternate long and short dash
line in FIG. 7 (a). As shown in FIG. 8 (&) I (b) # (e), the first unit cap 44 has a diameter J which is
smaller than the diameter of the cap 49 at one end of the substantially cylindrical cap 49. A
substantially cylindrical suspension portion 50 is formed, and the side surface is substantially
convex. A pair of hooks 51.51 is formed on the tip of the suspension s50 at an appropriate
interval, and a recess s52 is formed. Then, by inserting the opening of the one cap portion 49
between the iiljm of the microphone body 40 and the way of the second accumulation portion 48
of the gate 42), the microphone body 40 and the first unit The cap 44 is to be attached. FIG. 8 (,)
is a cross-sectional view of a portion indicated by one point edge of the figure. On the other hand,
the second unit cap 45 has the same configuration as the first unit cap 44 and is attached to the
rear of the weight 42. Next, the means for suspending the microphone main body 37 configured
as described above via the frame 30 internal pressure elastic member 32 will be described. That
is, as shown in FIG. 9, the elastic member 32 is formed in a cross shape, and a through hole 53 is
formed in the central portion thereof. Furthermore, a bowl-like ston / 4l-s 4 is formed at each of
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the tip portions thereof. Then, as shown in FIGS. 1 and 11, the through hole 53 of the elastic
member 32 is fitted with the recess 52 formed with the suspension # 5 OK of the first unit key
45. Next, 1 microphone unit 31-4 is loosely inserted into the frame 30, and the elastic member
32 of the elastic member 32 is taken out from the inside of the frame 30 to the outer frame of
the frame 30 through the large diameter through hole 36 t The stotsno # -54 is slid in the
direction of the small diameter through hole 38. Therefore, the stop 4 is locked to the locking
portion 34 of the frame 30, and as shown in FIG. 11, the first 5-knit character / 44 is
approximately at the center of the 7th lay J-30 via the elastic member 32. It is hung on the
department. Further, the second unit cap 45 is also suspended by the elastic member 32 in
substantially the same manner as in FIGS. 10 and 11 in the frame 30, and in the end, the
microphone unit 31 is a frame as shown in FIG. It is suspended within 30. Thus, according to the
vibration isolation mechanism of the microphone according to the basic example configured as
described above, the mechanical vibration due to the rotation or the like of the front ml sine
camera 2 is absorbed by the elastic member 32 and transmitted to the microphone unit 31 It is
possible to prevent the problem, and eliminate the problem such as the deterioration of the SA
ratio as in the prior art.
In addition, the microphone unit king is drawn from four directions (total eight directions at both
ends), and the elastic member 32 is a first and second unit character! As it is reliably deposited
on the hanging portions of the 44. 45 and the locking portions 34 and 35 of the frame 30, the
microphone unit 31t can be stably and reliably supported. Furthermore, in the above basic
example, the microphone unit 31 is suspended from four directions, but it may be three
directions as appropriate. By the way, the vibration isolation mechanism of the microphone
according to the basic example configured as described above is an elastic member 32 such as
rubber in the radial direction orthogonal to the cylinder axis direction from the center part of
both ends of the microphone unit 31 in the cylindrical frame 30. Because it is hard to move in
the direction (arrow Y direction in Fig. 4) orthogonal to the axis you want to vibration-proof
(removal) really, the removal effect is small. It has a structure that is easy to move in the axial
direction (the direction of the arrow X of M 4 −) which does not want to move in the opposite
pressure direction. 33L ・ Therefore, this invention is expressed with particular attention to this
point, and it is easy to move in the direction orthogonal to the axis to be truly vibrated to
increase the vibration isolation and to move in the axial direction which is not easy to move. The
timing is provided at a point where the microphone unit can be held in such a way as to suppress
production as much as possible. Next, an actual picture / decision of this invention based on the
above outline will be described with reference to FIG. 12 for mK. However, in this case, in the
configuration according to the basic example shown in FIGS. 1 to 11 described above, the
configuration excluding the microbon unit hanging-down support relationship of FIGS. 4 to 11 is
also basic in this invention. The explanation is omitted assuming that the configuration is the
same as the configuration of the example. That is, in FIG. 12 fa) + (b), 30 'is a frame formed in a
cylindrical shape by forming a large number of through holes 33' on the side surface as in the
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basic example described above. In addition, 31 'is a microphone unit configured for swimming
with the above-described basic example and 115 ", or by omitting the hanging portion of the cap
to be put on the both ends of this place and the 0 head to the 1 cap itself. It is also good. Then,
the microphone unit JJ 'in the cylindrical frame 30' is, for example, lI! Substantially equal to the
length of the microphone unit 31 '. The elastic member 32 'is supported by an elastic member
32' formed in the shape of a stem b by a band-like copper material having 111t-. Here, the
springy elastic member 32 'has its inner end fixed to the outer peripheral wall of the microphone
unit 31' and its outer end fixed to the inner peripheral wall of the cylindrical frame 30 '. As a
result, the microphone unit 31 'is supported in a state of being wound around the central portion
of the spiral so that the microphone unit 31' is coaxial with the central portion of the cylindrical
frame 30 '.
According to such a configuration, since the microphone unit 31 'is supported so as to be flexible
by + = J in the direction of the arrow Y direction C perpendicular to the axis and the spring-like
elastic member 32', it is true. C and K series made easy to move in the direction of vibration
isolation, so that the #t 111 J absorption effect in the same direction, that is, the vibration
isolation effect can be improved in town and 1−X− = i. Since the mainspring-like elastic
member 32 'itself is not flexible with respect to the axial direction (arrow X direction) K which is
not desired to work, the microphone unit J1' can be restrained as much as possible in the same
direction. Become seven. As a result, as a whole is stably and reliably supported and the vibration
isolation effect is synergistically enhanced, it is possible to generate a very good vibration
isolation effect. FIG. 13 shows the center of the spring-like elastic member 32 '(the inner end
portion of the elastic member 32' so that the microphone unit 31 'may be lowered to the central
portion of the frame 3 in the supporting state in consideration of the weight of the microphone
unit L. An example is shown in which I) is eccentrically placed on the earth side. Then, a damping
material such as foam rubber is attached to one side or both sides of the spring-like elastic
member 32 'so as to prevent the generation of undesired sound when shock is applied. Because it
can be 2) Note that the present invention is not limited to the above-described embodiment, and
the present invention can be modified and implemented without departing from the scope of the
invention. Therefore, as described above in detail, according to the present invention, it is
possible to provide a very good microphone vibration isolation mechanism capable of obtaining a
sufficient vibration isolation effect and supporting the microphone stably and reliably. .
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