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JP2008289076

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JP2008289076
The present invention provides a speaker frame that can reduce distortion of sound quality to
achieve high quality sound quality. A speaker frame (100) has a frame-shaped edge mounting
portion (1) attached to a front surface (1a) of an edge of a diaphragm constituting the speaker
and an edge mounting portion (1) within the frame shape of the edge mounting portion (1). A
magnetic circuit mounting portion 2 which is disposed at the rear and to which a magnetic
circuit for vibrating a voice coil connected to a diaphragm is attached, and is mounted between
an edge mounting portion 1 and the magnetic circuit mounting portion 2 And a leg portion 3
connecting the portion 1 and the magnetic circuit mounting portion 2. The leg portion 3 has a tip
portion projecting to the front side in a cut surface when cut at a plane perpendicular to the
installation direction of the edge attachment portion 1 and the magnetic circuit attachment
portion 2. [Selected figure] Figure 1
Speaker frame
[0001]
The present invention relates to a speaker frame.
[0002]
Conventionally, as shown in, for example, FIG. 6, FIG. 7 and Patent Document 1, the speaker
frame formed by metal plate press molding has a shape in which the central portion is recessed
toward the rear side, and the opening of the speaker frame 400 A plurality of leg portions 402,
402,... Are formed by removing window holes 401, 401,.
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As shown in FIG. 6, such a leg portion 402 is formed such that its front surface 402a is
substantially flat when viewed from the front side (the side on which the diaphragm is attached)
of the speaker frame 400. 6 is a perspective view when the speaker frame 400 is viewed from
the front side, and FIG. 7 is a perspective view when the speaker frame 400 is viewed from the
rear side. JP-A-8-70495
[0003]
By the way, although the speaker frame having the flat front portion as described above is
considered in terms of structural strength, the air resistance increases because the amount of air
flow received during the operation of the speaker is large. Interfere with the smooth operation of
As a result, the sound quality tends to be distorted. The present invention has been made in view
of the above-mentioned circumstances, and an object thereof is to provide a speaker frame
capable of reducing distortion of sound quality and achieving high quality sound quality.
[0004]
In order to solve the above-mentioned problems, according to the invention of claim 1, the edge
of the diaphragm constituting the speaker is a frame-like edge attachment portion attached to
the front, and the edge attachment portion within the frame shape of the edge attachment
portion. A magnetic circuit attachment portion which is disposed rearward with respect to the
vibration plate and to which a magnetic circuit for vibrating a voice coil connected is attached,
and is bridged between the edge attachment portion and the magnetic circuit attachment portion;
In a speaker frame including the leg mounting portion connecting the edge mounting portion and
the magnetic circuit mounting portion, the leg portion is perpendicular to the direction in which
the edge mounting portion and the magnetic circuit mounting portion are installed. In the cut
surface at the time of cut ¦ disconnecting in a surface, it has the tip part which protrudes to the
front side, It is characterized by the above-mentioned.
[0005]
The invention according to claim 2 is characterized in that, in the speaker frame according to
claim 1, the tip end portion of the leg portion has a pointed shape.
[0006]
The invention according to claim 3 is characterized in that, in the speaker frame according to
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2
claim 1, the cut surface of the leg portion is triangular.
[0007]
The invention according to claim 4 is the speaker frame according to claim 1, wherein the cut
surface of the leg portion is semicircular.
[0008]
The invention according to claim 5 is the speaker frame according to any one of claims 1 to 4,
characterized in that the leg portion is a hollow body having a cavity inside.
[0009]
The invention according to claim 6 is the speaker frame according to claim 5, characterized in
that an elastic member is inserted in the cavity.
[0010]
The invention according to claim 7 is the speaker frame according to any one of claims 1 to 6,
wherein a plate-like portion for forming the leg portion includes the edge attachment portion and
the magnetic circuit attachment portion. The space between them is provided so as to connect
the edge mounting portion and the magnetic circuit mounting portion, and the left and right side
edge portions facing each other in the circumferential direction of the plate-like portion are bent
forward and brought into contact with each other. , The leg portion is formed.
[0011]
According to an eighth aspect of the present invention, in the speaker frame according to the
seventh aspect, the plate-like portion is formed with a plurality of holes for enabling the left and
right side edge portions to be bent forward along the bending direction. It is characterized by
[0012]
According to the present invention, since the leg has the tip projecting forward on the cut surface
when cut in a plane perpendicular to the installation direction of the edge mounting portion and
the magnetic circuit mounting portion, the speaker operates Air resistance can be reduced.
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As a result, distortion on the sound quality can be reduced to provide high quality sound.
[0013]
Hereinafter, embodiments of the present invention will be described.
FIG. 1 is a perspective view of the speaker frame 100 as viewed from the front side.
In the following description, the front-rear direction refers to the direction shown in FIG.
The speaker frame 100 is used for a speaker using a cone type diaphragm (not shown), and is
press-formed by an iron plate, an aluminum plate, a stainless steel plate, a copper plate or the
like.
The speaker frame 100 includes an edge attaching portion 1 to which an edge of a diaphragm is
attached, a magnetic circuit attaching portion 2 to which a magnetic circuit (not shown) is
attached, and a plurality of connecting the edge attaching portion 1 and the magnetic circuit
attaching portion 2 Of the legs 3, 3,.
[0014]
The edge attaching portion 1 is formed of a substantially annular plate, and the inner peripheral
edge 1 a of the edge attaching portion 1 is formed with a bent portion 11 which is bent
rearward.
A bent portion 12 bent toward the front side is formed on the outer peripheral edge 1 b of the
edge attaching portion 1.
Then, the edge of the diaphragm is attached in contact with the front surface 1 c of the edge
attachment portion 11.
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[0015]
The magnetic circuit mounting portion 2 is also formed of a substantially annular plate, and has
an outer diameter smaller than the inner diameter of the edge mounting portion 1.
The magnetic circuit mounting portion 2 is disposed rearward in the annular shape of the edge
mounting portion 1 so that the central axis coincides with the edge mounting portion 1. That is,
the magnetic circuit mounting portion 2 is shaped so as to be recessed rearward with respect to
the edge mounting portion 1. The magnetic circuit mounting portion 2 has a counterbore 21
formed on the front surface 2a thereof, and a magnetic circuit can be mounted on the rear
surface 21a (see FIG. 2) of the counterbore 21. Further, an opening 22 for passing a voice coil
(not shown) is formed at the central portion of the counterbore 21, and a bent portion 23 bent
toward the front side is formed on the outer peripheral edge 2b of the magnetic circuit
attachment portion 2. Is formed.
[0016]
Between the edge attachment portion 1 and the magnetic circuit attachment portion 2, a plurality
of (four in the present embodiment) legs 3, 3,... The leg portion 3 is on the front side of the first
plate-shaped portion 31 having a substantially rectangular shape in a plan view and the front
surface 31 a of the first plate-shaped portion 31 that is bridged between the edge attaching
portion 1 and the magnetic circuit attaching portion 2. And a ridge portion 32 formed in a shape
in which the tip end portion 34 is pointed.
[0017]
As shown in FIG. 2 described later, the ridges 32 are left and right side edge portions (portions
having a generally trapezoidal shape in plan view) 104 facing each other in the circumferential
direction in a second plate-like portion 103 having a substantially octagonal shape in plan , 105
to the front side, and the end portions of the side edges 104, 105 are formed in contact with
each other and fixed. The second plate-like portion 103 is formed integrally with the first
connecting portion 106 integrally formed at the bent portion 11 of the edge attaching portion 1
and the second connecting portion integrally formed at the bent portion 23 of the magnetic
circuit attaching portion 2. The first plate-like portion 31 and the first plate-like portion 103 are
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formed by bending the left and right side edge portions 104 and 105 opposing each other in the
circumferential direction of the second plate-like portion 103 toward the front side. The ridge
portion 32 is formed on the front surface 31 a of the plate-like portion 31. Then, a cavity 33 is
formed by the first plate-like portion 31 and the protruding portion 32. Moreover, the leg part 3
comprised in this way has comprised the substantially triangular shape in the cross section cut ¦
disconnected in the surface perpendicular ¦ vertical with respect to the longitudinal direction.
Although not shown, it is preferable to insert an elastic member having elasticity, such as foam
rubber, urethane foam, synthetic rubber, etc., into the formed cavity 33. By inserting such an
elastic member, the resonance of the speaker frame 100 can be reduced. Also, by changing the
type of the elastic member inserted into the cavity 33 appropriately, the sound quality can be
changed and the method of sound creation can be expanded.
[0018]
Here, the method of forming the protruding portion 32 will be specifically described with
reference to FIGS. 2 to 4. 2 to 4 are perspective views of the speaker frame 100 showing the
procedure for forming the protruding portion 32, and FIGS. 2 and 3 show the speaker frame 100
as viewed from the rear side. It shows the case where the frame 100 is viewed from the front
side. First, as shown in FIG. 2, the edge mounting portion 1 is formed by punching a plurality of
holes 102, 102,... In the circumferential direction at predetermined intervals in the frame main
body 101 in which a metal plate is formed in advance into a predetermined shape. Between the
magnetic circuit attachment portion 2 and the second plate-like portion 103 having a
substantially octagonal plan view shape is formed. Next, as shown in FIG. 3, in the formed second
plate-like portion 103, holes are formed so that the left and right side edge portions 104 and
105 of the second plate-like portion 103 can be easily bent to the front side. Specifically, in the
second plate-like portion 103, the first connecting portion 106 connected to the edge mounting
portion 1 and the second connecting portion 107 connected to the magnetic circuit mounting
portion 2 The plurality of holes 108, 108,... Are formed at predetermined intervals so that one
end of the connecting portion 106 and one end of the second connecting portion 107 opposed
thereto are arranged on the same straight line. Similarly, a plurality of holes 109 and 109 at
predetermined intervals so that the other end of the first connection portion 106 and the other
end of the second connection portion 107 opposed thereto are arranged on the same straight
line. Form ... Next, as shown in FIG. 4, in the second plate-like portion 103 subjected to the hole
processing, the plurality of holes 108, 108,..., 109, 109 in which the left and right side edges
104, 105 are linearly arranged. , ... bent along the front side respectively. Finally, the ends 104a
and 105a of the bent left and right side edges 104 and 105 are brought into contact with each
other and fixed. The fixing means may be adhesively fixed by an adhesive or the like, or may be
fixed by caulking the end portions 104a and 105a of the side edge portions 104 and 105 to each
other. As described above, the abutting portions (tip portions 34) of the respective end portions
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104a and 105a of the left and right side edge portions 104 and 105 become the protruding
portion 32 having a shape pointed to the front side.
[0019]
As described above, according to the embodiment of the present invention, the leg portion 3 is
cut in a plane perpendicular to the installation direction of the edge attachment portion 1 and the
magnetic circuit attachment portion 2 (that is, the longitudinal direction of the leg portion 3). In
the cut surface at the time, since the tip end portion projects forward, air resistance at the time of
the speaker operation can be reduced as compared with the case where the surface on the
diaphragm side of the leg is flat as in the prior art. As a result, distortion on the sound quality can
be reduced to provide high quality sound. Further, the leg 3 is formed by bending the left and
right side edges 104, 105 opposite to each other in the circumferential direction of the second
plate-like portion 103 having an octagonal shape in plan view forward and abutting against each
other. The part 3 can be easily formed. Furthermore, since the second plate-like portion 103 is
formed with a plurality of holes 108, 108,..., 109, 109,. The left and right side edge portions 104
and 105 can be easily bent.
[0020]
The present invention is not limited to the above embodiment, and can be appropriately modified
without departing from the scope of the invention. For example, although the leg 3 in the abovedescribed embodiment has a triangular cross section cut in a plane perpendicular to the
longitudinal direction, the cross section is not limited to a triangular shape, and the cut surface is
a half as shown in FIG. It may be a circular leg 3A. The protruding portion 32A of such a leg 3A is
formed by punching a plurality of holes of a desired shape on a frame plate made of a metal plate
so that the cut surface has a semicircular shape when bent. It can be formed by bending the left
and right side edges of the plate-like portion to the front side. Further, in FIG. 5, the same
components as in FIG. 1 will be assigned the same numerals as in FIG.
[0021]
Furthermore, although the leg portion 3 in the above embodiment has the cavity 33 inside, it
may be formed in a columnar shape so as not to have the cavity 33. Further, the number of legs
3 is not limited to the one described above, and can be changed as appropriate.
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[0022]
It is a perspective view at the time of seeing the flame ¦ frame 100 for speakers from the front
side. It is a perspective view at the time of seeing from the back side of the flame ¦ frame 100 for
speakers which showed the formation procedure of the projection part 32. FIG. It is the
perspective view of the place seen from the back side of the flame ¦ frame 100 for speakers
which showed the formation procedure of the projection part 32. FIG. It is a perspective view at
the time of seeing from the front side of the flame ¦ frame 100 for speakers which showed the
formation procedure of the projection part 32. FIG. It is a perspective view at the time of seeing
frame 100A for speakers of a modification from a front side. It is a perspective view at the time
of seeing the flame ¦ frame 400 for speakers from the front side. It is a perspective view when
the flame ¦ frame 400 for speakers is seen from back side.
Explanation of sign
[0023]
1, 1A edge mounting portion 2, 2A magnetic circuit mounting portion 3, 3A leg portion 33, 33A
cavity 100, 100A speaker frame 103 second plate portion 104, 105 side edge portion 108, 109
hole
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