JP2008109576A - Speaker equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To make it possible to fix a cable surely and firmly even if there is no space on the rear face side of a frame. <P>SOLUTION: The speaker equipment 1 has a vibrator 2, a driving portion 3, and the frame 4. The frame 4 has a stepped surface 4A1 parallel to the bottom face of the speaker equipment 1 on the rear face side thereof. On the stepped surface 4A1, a pair of linear projections 10 are formed to fix the cable 9 to be connected to the driving portion 3 by holding it in between. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a speaker device.

  The speaker device includes a vibrating body including a diaphragm, a driving unit that vibrates the vibrating body, and a frame that supports them. The drive unit that vibrates the vibrating body includes a voice coil to which a voice current is input, a voice coil bobbin around which the voice coil is wound, and a magnetic circuit that forms a magnetic gap that applies an electromagnetic force to the voice coil. Thus, the voice coil bobbin is connected to the inner periphery of the vibrating body whose outer periphery is supported by the frame, and the vibration of the electromagnetic force acting on the voice coil is transmitted to the vibrating body via the voice coil bobbin. The end of the voice coil is connected to a connection terminal attached to the frame via a lead wire, and a terminal of a cable connected to a signal output source is connected to this connection terminal.

  Since this connection terminal is provided on the back side of the frame, this cable is pulled out to the back side of the frame. In particular, when a voice coil having a plurality of coils (hereinafter referred to as a dual voice coil) is used, for example, when there are a plurality of connection terminals and these connection terminals are attached to the left and right sides of the frame, each connection Since a cable connecting the terminals is required separately, at least one cable is drawn out along the back surface of the frame. Also, in the case of a coaxial type (coaxial type) speaker, the cable drawn from the drive unit of the central sub-speaker is drawn to the back side of the frame and is routed along the back side of the frame. At this time, in order to prevent the cable from wobbling, it is necessary to provide some cable fixing structure on the back surface of the frame.

  FIG. 1 is an explanatory view showing a conventional cable fixing structure. In the prior art described in Patent Document 1 below, as shown in FIG. 5A, a locking portion J2 having a tunnel-shaped insertion hole J2a is formed on a part of the back surface of the frame J1, and the insertion hole J2a is formed in the insertion hole J2a. The string-like clamper member J3 is inserted, and the drawn-out cable J4 is fastened and fixed to the outer surface of the locking portion J2 by the clamper member J3. In the prior art described in Patent Document 2 below, as shown in FIG. 2B, a cantilever tongue piece J6 is formed in a notch formed on the back surface of the frame J5, and the tongue piece J6. The cable J7 drawn out to is sandwiched and fixed.

Japanese Utility Model Publication No. 6-44288 Japanese Utility Model Publication No. 6-2894

  According to such a conventional technique, a space for fixing the cable is required on the back side of the frame. In the prior art of FIG. 1 (a), the locking portion J2 protrudes to the back side, so that a space for accommodating this is required. Moreover, in the prior art of FIG.1 (b), although there is no protrusion like the latching | locking part J2, the space equivalent to the thickness of a cable is required at least. However, when a speaker is embedded in a wall surface or the like, there may be a case where a sufficient space cannot be secured on the back side of the frame like a vehicle-mounted speaker. There is a problem of causing trouble.

  In addition, with the cantilever fixing means as shown in FIG. 1B, sufficient strength cannot be obtained. Therefore, when the cable is sandwiched, the tongue piece J6 opens and becomes loose and cannot be fixed firmly. Problems arise.

  In addition, when the fixing means as shown in FIG. 1B is formed on the side surface of the frame, there is a problem that the strength of the frame itself is lowered, for example, the frame is deformed and high-quality sound cannot be reproduced.

  An object of the present invention is to deal with such a problem, and it is possible to securely and firmly fix a cable even when there is no empty space on the back side of the frame. The purpose is not to cause a decrease in strength.

  In order to achieve such an object, the speaker device according to the present invention comprises at least the configurations according to the following independent claims.

  [Claim 1] A speaker device including a vibrating body, a driving unit that vibrates the vibrating body, and a frame that supports the vibrating body and the driving unit, wherein the frame includes a bottom surface of the speaker device on a back side. A speaker device comprising a parallel stepped surface, and a pair of linear protrusions fixed on the stepped surface with a cable connected to the drive unit interposed therebetween.

  Embodiments of the present invention will be described below with reference to the drawings. 2 and 3 are explanatory views showing the overall structure of the speaker device according to one embodiment of the present invention, in which FIG. 2 is a side sectional view and FIG. 3 is a rear view. In this embodiment, a coaxial (coaxial) speaker will be described as an example.

  The speaker device 1 includes a vibrating body 2 (2A, 2B), a driving unit 3 (3A, 3B) that vibrates the vibrating body 2, and a frame 4 that supports the vibrating body 2 and the driving unit 3. Explaining the structure of the main speaker, the outer peripheral portion of the vibrating body 2A is connected to the front support portion 4A2 of the frame 4, and the inner end portion of the vibrating body 2A is connected to the outer periphery of the voice coil bobbin 31 of the driving portion 3A. The drive unit 3A includes a voice coil 30 to which a voice current is input, a voice coil bobbin 31 around which the voice coil 30 is wound, and a magnetic circuit 32 that forms a magnetic gap 32G that applies an electromagnetic force to the voice coil 30. It has. The configuration of the magnetic circuit 32 is not particularly limited, but in the illustrated example, an external magnetic type magnetic circuit in which a magnet 32A is disposed outside the magnetic gap 32G is shown, and the yoke 32B made of a magnetic material is shown. A magnet 32A is sandwiched between the bottom portion and the plate 32C, and a magnetic gap 32G is formed between the inner peripheral surface of the annular plate 32C and the outer peripheral surface of the center pole portion of the yoke 32B. The outer peripheral edge of the damper 5 is connected to the outer periphery of the voice coil bobbin 31, the outer peripheral edge of the damper 5 is supported by the frame 4, and the voice coil bobbin 31 is supported by the frame 4 via the damper 5.

  Explaining the structure of the sub-speaker arranged at the center of the speaker device 1, the outer peripheral part of the vibrating body 2B (dome type) is supported by the front support part of the support 6, and the inner peripheral part is the voice of the drive part 3B. It is connected to the coil bobbin 3B1. The drive unit 3B includes a voice coil 3B0 to which a voice current is input, a voice coil bobbin 3B1 around which the voice coil 3B0 is wound, and a magnetic circuit that forms a magnetic gap 3B2 that applies an electromagnetic force to the voice coil 3B0. I have. In the example shown in the drawing, the magnetic circuit is an internal magnet type magnetic circuit in which a magnet 3B3 is arranged inside the magnetic gap 3B2, and the magnet 3B3 is sandwiched between the bottom of the yoke 3B4 made of a magnetic material and the plate 3B5. A magnetic gap 3B2 is formed between the outer peripheral surface of the disk-shaped plate 3B5 and the inner peripheral surface of the yoke 3B4.

  Then, the tinsel wire 33 drawn from the drive unit 3A of the main speaker is connected to the connection terminal 7 attached to the frame 4, and the other end of the cable 8 whose one end is connected to the drive unit 3B of the sub speaker It is connected to the connection terminal 7. The cable 8 passes through the central penetrating portion of the speaker device 1 (inside the voice coil bobbin 31 and the yoke 32B), is pulled out to the back side of the frame 4, and is connected to a connection terminal 7 attached to the back side of the frame 4. . The connection terminal 7 is connected to the end of a cable 9 that reaches the signal output source. As a result, the signal from the signal output source is supplied to both the main speaker drive unit 3A and the sub-speaker drive unit 3B via the connection terminal 7.

  In such a speaker device 1, the frame 4 includes a step surface 4A2 parallel to the bottom surface of the speaker device 1 on the back side, and a pair that is fixed on the step surface 4A1 with a cable 9 connected to the driving unit 3 interposed therebetween. The linear protrusion 10 (10A, 10B) is formed. A connection terminal 7 for connecting the cable 9 is provided on the step surface 4A1.

  Here, the bottom surface of the speaker device 1 refers to the bottom surface of the yoke 32B of the drive unit 3A, and a step surface 4A1 is formed on the frame 4 so as to be parallel to this surface. The pair of linear protrusions 10 (10A, 10B) formed on the stepped surface 4A1 is narrower than the normal thickness of the cable 9 so that an appropriate gripping force is applied when the cable 9 is pushed in. It is formed, and the cable 9 pushed in between can be fixed with an appropriate gripping force.

  When the frame 4 is a metal frame, the linear protrusion 10 (10A, 10B) can be formed by stamping as shown in FIG. In this case, the punched deformed portion protrudes to the back side of the step surface 4A1 to form the linear protrusions 10 and 10B, and the hole p is formed in the punched portion. The formation of the linear protrusions 10 is not limited to this. For example, when the frame 4 is made of resin, it can be integrally formed by molding or the like, and when it is made of aluminum, it can be integrally molded.

  According to such an embodiment, the space (dead space) on the stepped surface 4A1 formed by being recessed in the side portion of the frame can be used as the cable placement space, so that the cable routing space can be reduced. It is not necessary to form it separately, and the space efficiency of the back side space of the frame 4 can be improved. Therefore, the speaker device can be easily installed even on a wall surface or the like in the vehicle where the installation space cannot be made large.

  In addition, before attaching the speaker device to a car or the like, a rain cover or the like may be attached so that water or the like does not adhere to the back side of the speaker device. In this case, for example, as shown in FIG. 1, if the locking portion is formed on the side surface of the frame, for example, it is difficult to attach the rain cover or restrictions on the portion to be attached occur. By forming the linear protrusion 10 on the step portion of the frame, the rain cover can be easily attached.

  Further, when the locking portion as shown in FIG. 1 is to be attached to the stepped portion 4A1 of the frame which is the attachment surface of the damper 5, the area required for firmly attaching the damper 5 is large due to the large locking portion. Cannot be secured. On the other hand, if the damper 5 is firmly attached, it is difficult to form a locking portion in the stepped portion 4A1. On the other hand, since the linear protrusion 10 (10A, 10B) requires a small space for forming it, the cable 9 is secured while sufficiently securing the mounting surface of the damper 5 at the stepped portion 4A1. It can be fixed securely.

  Also, the cable 9 can be fixed simply by pushing the cable 9 into the gap between the linear protrusions 10A and 10B. Therefore, the cable 9 can be fixed easily, and compared with a cantilevered fixing piece. Can be firmly fixed.

  5, 6 and 7 show a modification of the above-described embodiment of the present invention. The same parts are denoted by the same reference numerals, and redundant description is omitted.

  In the embodiment shown in FIG. 5, the linear protrusions 10 </ b> C and 10 </ b> D are formed so as to protrude not only on the back side of the frame 4 but also on the front side of the frame 4. As described above, the linear protrusions 10 </ b> C and 10 </ b> D formed on the front surface side of the frame 4 can play a role of positioning when the damper 5 is attached to the frame 4.

  In the embodiment shown in FIGS. 6 and 7, when the cable 8 is pulled out to the back side of the frame 4, the cable 8 is pulled out in a direction different from that of the connection terminal 7 and connected. It is led to the terminal 7. At this time, the routed cable 8 is fixed by the linear protrusions 10 (10A, 10B) on the step surface 4A1.

  As described above, the cable fixed by the linear protrusion 10 may be the cable 9 that connects the connection terminal 7 and the signal output source, or the cable 8 that connects the driving unit 3B of the sub speaker and the connection terminal 7. It may be.

  That is, in the case of the coaxial type speaker device shown in FIGS. 2, 3 or 6 and 7, as shown in FIGS. 2 and 3, the cable 8 connected to the driving unit 3B of the sub speaker is connected to the connection terminal 7 side. , The cable 9 connecting the connection terminal 7 and the signal output source can be fixed to the linear protrusion 10 and connected to the driving unit 3B of the sub-speaker as shown in FIGS. When the cable 8 is pulled out on the side opposite to the connection terminal 7, the cable 8 itself can be fixed to the linear protrusion 10. In any case, in the coaxial type speaker in which the cable needs to be routed on the back side of the frame, the cable routing space can be efficiently secured, and the cable can be fixed easily and reliably. In addition to the cable, a network element such as a capacitor can be fixed as necessary.

  Moreover, in embodiment shown so far, the connection terminal 7 is provided on level | step difference surface 4 A1, and the connection terminal 7 is provided on the same plane as the surface where the cable 8 or 9 is fixed by the linear protrusion 10. . As a result, the cable 8 or 9 can be guided to the connection terminal 7 at a short distance, the cable extra length can be minimized, and the storage efficiency of the cable 8 or 9 can be further increased.

  FIG. 8 is an explanatory view (rear view) showing another embodiment of the present invention. In this embodiment, the basic configuration is the same as that of the above-described embodiment (however, the sub-speaker is not provided), but the drive unit 3 includes a dual voice coil, and a connection terminal (main terminal) of one voice coil. 7A and the connection terminal (relay terminal) 7B of the other voice coil are provided at different positions, and the cable 11 that connects one connection terminal 7A and the other connection terminal 7B is fixed to the linear protrusion 10.

  In this embodiment, two voice coils are wound around a voice coil bobbin (not shown) of the drive unit 3, and one voice coil is connected to a connection terminal 7A serving as a main terminal via a tinsel wire, The other voice coil is connected to a connection terminal 7B serving as a relay terminal via a tinsel wire. Thus, the balance of the voice coil bobbin is kept substantially perpendicular to the vibration direction by distributing the drawing direction of the tinsel wire to the left and right.

  At this time, since the cable (not shown) connected to the signal output source is connected to the connection terminal 7A as the main terminal, the cable 11 for sending this signal to the connection terminal 7B as the relay terminal is necessary. become. The cable 11 is routed along the back surface of the frame 4, but a step surface 4A1 is formed on the frame 4, and the cable 11 is fixed to the linear protrusion 10 formed on the step surface 4A1. Thus, a space for routing the cable 11 can be efficiently secured, and the cable 11 can be fixed easily and reliably.

  Here, since the connection terminals 7A and 7B are both mounted on the step surface 4A1 to which the cable 11 is fixed, the connection terminals 7A and 7B can be connected by the cable 11 at a short distance, and the cable extra length Can be minimized, and the storage efficiency of the cable 11 can be further increased.

  On the other hand, since the linear protrusion 10 is formed on the stepped surface 4A1 of the frame 4, the strength of the frame 4 is not reduced compared to the case where the linear protrusion 10 is formed on the side surface of the frame 4, and the frame 4 Sufficient strength can be obtained. Therefore, when the speaker device is mounted on the rear part of the vehicle or the like, even if a large impact is applied to the vehicle, the frame 4 can generate a high-quality reproduced sound without substantially deforming.

  The manufacturing method of the speaker device according to the embodiment of the present invention will be described. The frame 4 is characterized in that a step surface 4A1 parallel to the bottom surface of the speaker device is formed on the back side, and the step surface 4A1 is formed. On the top, a pair of linear protrusions 10 are formed which are fixed with a cable connected to the drive unit 3 interposed therebetween. Here, when the frame 4 is formed of a metal plate, the stepped surface 4A1 can be formed by press molding, and at the same time, the linear protrusion 10 can be formed by punching molding. When the frame 4 is resin-molded, the step surface 4A1 and the linear protrusion 10 can be molded simultaneously by molding.

It is explanatory drawing of a prior art. Explanatory drawing of the speaker apparatus which concerns on embodiment of this invention (side fragmentary sectional view) Explanatory drawing (rear view) of the speaker apparatus which concerns on embodiment of this invention Explanatory drawing (principal part perspective view) of the speaker apparatus which concerns on embodiment of this invention Explanatory drawing (principal part perspective view) of the speaker apparatus which concerns on embodiment of this invention Explanatory drawing of the speaker apparatus which concerns on embodiment of this invention (side surface fragmentary sectional view) Explanatory drawing (rear view) of the speaker apparatus which concerns on embodiment of this invention Explanatory drawing (rear view) of the speaker apparatus which concerns on embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Speaker apparatus 2 Vibrating body 3 Drive part 4 Frame 4A1 Step surface 5 Damper 6 Support body 7 Connection terminal 8, 9, 11 Cable 10 Linear protrusion

Claims (5)

A speaker device comprising a vibrating body, a driving unit that vibrates the vibrating body, and a frame that supports the vibrating body and the driving unit,
The frame has a step surface parallel to the bottom surface of the speaker device on the back side, and a pair of linear protrusions are formed on the step surface so as to fix the cable connected to the drive unit. A speaker device.   The speaker device according to claim 1, wherein a connection terminal for connecting the cable to the driving unit is provided on the step surface.   The speaker device according to claim 1, wherein the speaker device is a coaxial type, and a cable connected to a driving unit of a central sub speaker is fixed to the linear protrusion.   The drive unit includes a dual voice coil, the connection terminal of one voice coil and the connection terminal of the other voice coil are provided at different positions, and the cable connecting one connection terminal and the other connection terminal is the linear shape The speaker device according to claim 1, wherein the speaker device is fixed to a protrusion.   The speaker device according to claim 1, wherein the linear protrusion is formed by punching using the frame as a metal frame.

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