JP2008252611A - Speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow a speaker having a wiring board onto which an LED emitting light to the back of a diaphragm is mounted to be decomposed into a frame, the wiring board, and a magnetic circuit. <P>SOLUTION: A magnetic circuit section 15 is attached to a magnet attachment section 11 of the frame 3 with a screw 16. A printed-wiring board 23 is sandwiched between the magnetic circuit section 15 and the frame 3, and is screwed to a substrate support section 12 and the rear wall 3b of the frame 3 with a screw 27. The magnetic circuit section 15 can be disconnected from the frame 3 by extracting the screw 16. After that, by extracting the screw 27, the printed-wiring board 23 can be removed from the frame 3. More specifically, the speaker 1 can be decomposed into the frame 3, the printed-wiring board 23, and the magnetic circuit section 15, thus facilitating work, such as the removal of the printed-wiring board 23 for repair and exchange. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention belongs to the technical field of speakers.

There is a technique for obtaining an electric decoration effect by attaching a light emitter to a speaker. For example, Japanese Patent Laid-Open No. 2001-95074 (Patent Document 1) discloses a speaker that irradiates light emitted from a light source to a center cap attached to the center of a diaphragm and diffuses it with a satin or the like provided on the inner surface thereof. It is disclosed.
JP 2001-197579 A

However, since the speaker described in Patent Document 1 only shines at the center, the visual effect is limited.
The applicant of the present application has already proposed a speaker that can illuminate the entire surface of the diaphragm (Japanese Patent Application No. 2006-83028).

  When an LED is placed behind a cone-shaped diaphragm made of translucent synthetic resin as in the above application and the diaphragm is irradiated with the LED light, the LED is wired. It is preferable to mount on a substrate and attach the wiring substrate to the frame.

  On the other hand, when the LED becomes unable to emit light normally, repair work such as replacement is necessary. However, in the conventional speaker, the frame and the magnetic circuit are not disassembled, and the conventional state is maintained. The repair work described above was extremely difficult for the structure.

  The object of the present invention is to facilitate such repair work.

The speaker according to claim 1 is:
A cone-shaped diaphragm made of translucent synthetic resin,
An edge connected to the large-diameter end of the diaphragm;
A bobbin in which a voice coil is turned and connected to a small-diameter end of the diaphragm;
A damper that supports the bobbin so as to vibrate in an axial direction of the bobbin;
A frame that supports the diaphragm via the edge and the damper;
A wiring board on which LEDs for irradiating light on the back surface of the diaphragm are mounted;
A magnetic circuit for vibrating the bobbin in the axial direction of the bobbin,
The magnetic circuit is connected to the frame so that the connection with the frame can be released,
The wiring board is disposed at a position sandwiched between the frame and the magnetic circuit, and is attached to the frame so as to be removable from the frame.
Since the magnetic circuit is separated from the frame, the wiring board can be removed from the frame.
When it is necessary to repair or replace the LED or the wiring board, the magnetic circuit is separated from the frame, the wiring board is removed from the frame, and for example, it can be replaced with a wiring board on which a normal LED is mounted. In this way, the work of repairing or replacing the wiring board on which the LED is mounted becomes extremely easy.

Note that the number of wiring boards is not limited to one, that is, a structure in which a plurality of wiring boards are combined may be used.
For the diaphragm, a light-transmitting synthetic resin, for example, a sheet of polycarbonate, polyethylene, acrylic, PET, or the like may be used. The translucency may be transparent or translucent. If it is transparent, the diaphragm emits light brightly, and if it is translucent, it emits soft light. Moreover, the translucent synthetic resin may be colored with a dye or a pigment.

  The diaphragm may be provided with a light diffusion pattern formed by minute projections or depressions. If it does so, since the light emitted from LED is diffused and radiated | emitted by the light-diffusion pattern provided in the diaphragm, the substantially whole area of a diaphragm can be used effectively for the decoration effect by light emission.

  As the light diffusion pattern, for example, a pattern in which a large number of linear ridges are arranged in parallel, a pattern in which a large number of linear ridges are arranged in a grid pattern, and a diagonal stripe is added to the grid pattern. Patterns, circles, ellipses, polygons (triangles, quadrangles, hexagons, etc.) and other patterns (stars, diamonds, etc.) arranged in concentric circles are repeated. Can do. A similar pattern may be formed with concave stripes. Moreover, patterns other than those exemplified here may be used.

  When a light diffusion pattern is formed by ridges or ridges, the line density (number per unit length along the width direction of the ridges or ridges) should be 1/1 mm or more (1 mm pitch or less). preferable. For example, it can be 2 / 1mm (0.5mm pitch), 4 / 1mm (0.25mm pitch), 8 / 1mm or more (0.125mm pitch), 10 / 1mm (0.1mm pitch), etc. Further, the linear density may be increased.

Such a light diffusion pattern can be provided by pressing a translucent synthetic resin sheet.
The light diffusion pattern may be provided only on one side of the diaphragm, or may be provided on both sides of the diaphragm. If a good acoustic effect is expected, it may be provided only on one side, and if it is provided on both sides, the optical characteristics are improved.

When the light diffusing pattern is provided on both surfaces of the diaphragm, the light diffusing pattern may be the same on both surfaces. However, if each pattern is different, the diffusion mode is varied.
When a plurality of LEDs are arranged in a ring shape, a wide range (almost the entire area) of the diaphragm can be used for a decorative effect by light emission.

In that case, as described in claim 2, the LED may be mounted on the annular wiring board and arranged behind the diaphragm and outside the outer periphery of the damper.
When a plurality of LEDs are mounted on an annular wiring board, for example along a circle, and arranged behind the diaphragm and outside the outer periphery of the damper, the light emitted from these LEDs is reflected on the back of the diaphragm. Incident light is transmitted through the diaphragm and emitted from the front surface of the diaphragm. Therefore, a wide range (substantially the entire area) of the diaphragm can be used for the decoration effect by light emission.

  Also in this case, the number of wiring boards is not limited to one, that is, a plurality of wiring boards may be combined to form a ring. Alternatively, it may be partially cut (so-called C-shaped). Moreover, since it is sufficient to have an annular portion, for example, an overhanging portion for mounting a connector may be attached.

Further, the LEDs need only be arranged on an annular wiring board, and the interval is not particularly limited, but is preferably equal.
According to a third aspect of the present invention, the wiring board is configured to be attached to the back of the frame by positioning each LED in an opening provided in the frame at one location for each of the LEDs. For example, in a configuration in which the wiring board is disposed at a position sandwiched between the frame and the magnetic circuit, the light from the LED can be easily irradiated on the back surface of the diaphragm.

  By the way, the speaker has a lead wire that connects the audio signal input terminal and the voice coil. However, when the lead wire is routed in the same manner as in the past, the lead wire radiates from the LED and passes the light path toward the diaphragm. There is a risk that the shadow of the lead wire is reflected on the diaphragm.

  For this, the lead wire connecting the audio signal input terminal and the voice coil is fixed to the frame of the speaker at a position between the LEDs. It can be avoided by adopting it. That is, since the lead wire is fixed to the speaker frame at a position between the LEDs mounted on the wiring board, the lead wire does not cross the optical path of the light emitted from the LED and directed to the diaphragm. Can be in position. Thereby, the shadow of the lead wire is not reflected on the diaphragm, and such a shadow can be prevented from deteriorating the aesthetic appearance. When adopting the configuration of claim 4, it is desirable to fix the lead wire to the frame between the openings on the premise of the configuration of claim 3.

  The configuration and means for fastening the lead wire to the frame are not limited. For example, the lead wire may be fixed by adhesion or adhesion, or a hook or clamp may be provided on the frame and fastened by these.

Next, embodiments of the present invention will be described based on examples of the present invention. The present invention is not limited to the following examples and the like, and it goes without saying that the present invention can be implemented in various ways without departing from the gist of the present invention.
[Example]
As shown in FIG. 1, the speaker 1 of a present Example is a structure which supports each part with the flame | frame 3 used as frame | skeleton. The front end of the frame 3 is a substantially square flange 4, and the speaker 1 can be fixed using a hole 5 provided in the flange 4. The speaker 1 of the present embodiment is used by being attached to, for example, a front frame of a gaming machine, but the application is not limited to this and can be used for general purposes.

  A ring 6 is attached to the front surface of the flange 4, and the peripheral edge of the edge 7 is sandwiched between the flange 4 and the ring 6. The edge 7 is joined to the outer periphery of the front end portion of the cone-shaped diaphragm 8, and the frame 3 supports the front end portion of the diaphragm 8 via the edge 7.

  The diaphragm 8 is formed by translucent synthetic resin, for example, a sheet of polycarbonate, polyethylene, acrylic, PET, or the like formed into a cone shape. On one side or both sides of the diaphragm 8, light as illustrated in FIGS. A diffusion pattern is provided. The edge 7 is also made of the same material as the diaphragm 8 and is similarly provided with a light diffusion pattern.

  The light diffusing pattern shown in FIG. 4 has a structure in which straight ridges are arranged in a vertical, horizontal, and diagonal lattice shape, and the light diffusion pattern shown in FIG. 5 has a structure in which linear ridges are arranged in parallel. The light diffusing pattern shown in FIG. 6 has a structure in which a basic pattern in which ridges are arranged in a large and small concentric shape is repeated. FIG. 7 shows an example of the cross-sectional shape of the ridges constituting the light diffusion pattern, which can be triangular (a, b), trapezoid (c, d), arc (e), or the like.

  The body portion 3a of the frame 3 is provided with columnar magnet attachment portions 11 at four locations, and a terrace-like substrate support portion 12 is provided. A terminal portion 13 having a positive terminal 13a and a negative terminal 13b, which are audio signal input terminals, is fixed to the outer surface of the body portion 3a.

  A magnetic circuit portion 15 is attached to the magnet attachment portion 11 with screws 16. Specifically, the magnetic circuit unit 15 is configured by an annular magnet 17, a center pole 18 and a ring yoke 19 as well shown in FIGS. 3 (b) and 3 (c). And a center pole 18 is formed with a magnetic gap. Further, four fixed pieces 21 protrude from the outer periphery of the ring yoke 19 and are continuously provided. The above-described screw 16 passes through the fixed piece 21 and is screwed to the magnet mounting portion 11, whereby the magnetic circuit portion 15 is attached to the magnet mounting portion 11, that is, the frame 3.

The board support 12 is used for mounting the printed wiring board 23.
As shown in FIG. 3A, the printed wiring board 23 includes an annular LED arrangement portion 23a and a rectangular connector arrangement portion 23b. Eight multi-color LEDs 25 are equally spaced on the LED arrangement portion 23a. The connector 26 is mounted on the end of the connector placement portion 23b.

  The printed wiring board 23 is disposed between the magnetic circuit portion 15 and the frame 3, and is screwed to the substrate support portion 12 and the rear wall 3 b of the frame 3 by screws 27. That is, the magnetic circuit portion 15 is screwed to the frame 3 after the printed wiring board 23 is screwed to the frame 3. Then, if the screw 16 is removed, the magnetic circuit portion 15 can be detached from the frame 3, and then the printed wiring board 23 can be detached from the frame 3 if the screw 27 is removed. That is, the speaker 1 can be disassembled into the frame 3, the printed wiring board 23, and the magnetic circuit unit 15.

  The multicolor LED 25 is mounted on the front surface of the printed wiring board 23 (the side facing the diaphragm 8), but the rear wall 3 b of the frame 3 is provided with an opening 28 corresponding to each multicolor LED 25. The multicolor LEDs 25 are respectively inserted into the openings 28. Therefore, the light emitted from the multicolor LED 25 is not blocked by the rear wall 3b of the frame 3.

On the other hand, on the inner side of the frame 3, a bobbin 31 is disposed at a substantially central portion of the speaker 1.
The tip of the bobbin 31 passes through the small diameter side end of the diaphragm 8 and is connected to the diaphragm 8 at this portion. A center cap 32 for covering the opening of the bobbin 31 protruding inside the diaphragm 8 is attached to the diaphragm 8.

  The rear end of the bobbin 31 is externally fitted to the tip of the center pole 18, but there is a clearance between the inner periphery of the bobbin 31 and the outer periphery of the center pole 18, and the bobbin 31 is fitted to the center pole 18. It is not worn.

  Further, the voice coil 33 is wound around the bobbin 31 at a position within the above-described magnetic gap. However, there is a clearance between the voice coil 33 and the inner periphery of the ring yoke 19. ) Is not restrained by the ring yoke 19.

  In the central portion of the bobbin 31, the inner peripheral portion of the damper 34 is connected to the outer periphery of the bobbin 31, and the outer peripheral portion 34 a of the damper 34 is fixed to the rear wall 3 b of the frame 3. Note that the above-described opening 28 (that is, the multicolor LED 25) is located outside the outer periphery of the damper 34, and the damper 34 does not block light from the multicolor LED 25 toward the diaphragm 8.

  That is, the bobbin 31 is supported on the frame 3 (rear wall 3b) via the damper 34, and is not in contact with the center pole 18 and the ring yoke 19, and the bobbin 31 can be displaced in the axial direction thereof.

  Because of this structure, when an audio signal current is passed through the voice coil 33, the bobbin 31 around which the voice coil 33 is wound vibrates in the axial direction, and accordingly, the diaphragm 8 vibrates to generate sound. it can.

  By the way, in order to cause the voice signal current to flow through the voice coil 33, it is necessary to electrically connect the voice coil 33 to the voice signal input terminals (+ terminal 13a and -terminal 13b) to which the voice signal current is supplied from the outside. is there. For this purpose, as shown in FIG. 3A, one lead wire 35 is drawn from each of the + terminal 13a and the-terminal 13b and connected to the positive and negative terminals of the voice coil 33.

  These lead wires 35 are fastened to the rear wall 3b of the frame 3 at a position (clamp portion 37) between the multi-color LEDs 25 as shown in FIGS. It reaches the outer surface of the bobbin 31 without passing through the front of the color LED 25). In the present embodiment, the lead wire 35 is bonded to the rear wall 3b in the clamp portion 37. However, for example, a configuration in which a hook or a clamp is provided on the rear wall 3b and the lead wire 35 is fastened by them may be used.

  Therefore, the light emitted from the multi-color LED 25 is not blocked by the frame 3 (particularly the rear wall 3b), the damper 34, the lead wire 35, and is not blocked by other members. Irradiated to the back.

  For this reason, when the multicolor LED 25 is turned on, the light emitted from them is diffused and emitted by the light diffusion patterns provided on the diaphragm 8 and the edge 7. Therefore, almost the entire region of the diaphragm 8 and the edge 7 can be used for the decoration effect by light emission.

  Further, since the diaphragm 8 and the edge 7 are formed by molding a plastic sheet provided with a light diffusion pattern, the light diffusion pattern is distorted with the molding. Because of this distortion, for example, the brightness is changed between the center part (bobbin 31 side) and the outer peripheral part (edge 7 side) of the diaphragm 8, and light is irradiated to a flat sheet provided with a light diffusion pattern. Compared to times, the pattern of diffusion is varied.

  Since the light emitted from the multicolor LED 25 is diffused when passing through the diaphragm 8, the entire surface of the diaphragm 8 can be illuminated even if the number of the multicolor LEDs 25 is small with respect to the light emitting area of the diaphragm 8. .

Moreover, the effect of the diffusion can be changed and a wide range of light effects can be achieved by, for example, cyclically emitting or changing the color of the multi-color LEDs 25 arranged in a ring.
The multi-color LED 25 is disposed along the outer periphery of the damper 34 that supports the bobbin 31, but the portion of the rear wall 3b that is outside the damper 34 (the portion where the opening 28 is provided) is the conventional speaker. Since this is a portion that has not been used, it is not necessary to create a new space in order to equip the speaker 1 with the multicolor LED 25 (printed wiring board 23), and the speaker 1 is not enlarged.

  Moreover, since the lead wire 35 is fastened to the frame 3 by the clamp portion 37 between the multi-color LEDs 25 mounted on the printed wiring board 23 (between the openings 28 provided in the frame 3), the lead wire The 35 wiring paths can be positioned so as not to cross the optical path of the light emitted from the multicolor LED 25 and directed to the diaphragm 8. Thereby, the shadow of the lead wire 35 is not reflected on the diaphragm 8, and it can be prevented that such a shadow impairs the beauty.

  Furthermore, since the printed circuit board 23 and the frame 3 and the magnetic circuit unit 15 and the frame 3 are connected by screws, the speaker 1 can be disassembled into the frame 3, the printed circuit board 23, and the magnetic circuit unit 15. The printed wiring board 23 can be removed and reassembled. Therefore, for example, when a trouble such as a failure of one of the multi-color LEDs 25 occurs in the printed wiring board 23, it is possible to easily cope with removing the printed wiring board 23 for repair or replacement.

The top view (a) of the speaker of an Example, a front view (b), a right view (c), and a bottom view (d). The upper left perspective view (a) of the speaker of an Example, an upper right perspective view (b), a lower left perspective view (c), and a lower right perspective view (d). The top view (a) which described a part of speaker of the Example by the hidden line, BB sectional drawing (b), and EE sectional drawing (c). FIG. 3 is an exemplary diagram (1) of a light diffusion pattern provided on a diaphragm by the speaker of the embodiment. FIG. 3 is an exemplary diagram (2) of a light diffusion pattern provided on the diaphragm by the speaker of the embodiment. FIG. 3 is an exemplary diagram (3) of a light diffusion pattern provided on the diaphragm by the speaker of the example.

Explanation of symbols

1 ... Speaker,
3 ... Frame,
8 ... Diaphragm,
13 ... terminal part,
13a ... + terminal,
13b ...-terminal,
15 ... Magnetic circuit section,
23 ... printed wiring board,
25 ... Multicolor LED,
28 ... Opening,
31 ... Bobbin,
33 ... Voice coil,
34 ... Damper,
35 ... Lead wire,
37: Clamp part.

Claims (4)

A cone-shaped diaphragm made of translucent synthetic resin,
An edge connected to the large-diameter end of the diaphragm;
A bobbin in which a voice coil is turned and connected to a small-diameter end of the diaphragm;
A damper that supports the bobbin so as to vibrate in an axial direction of the bobbin;
A frame that supports the diaphragm via the edge and the damper;
A wiring board on which LEDs for irradiating light on the back surface of the diaphragm are mounted;
A magnetic circuit for vibrating the bobbin in the axial direction of the bobbin,
The magnetic circuit is connected to the frame so that the connection with the frame can be released,
The wiring board is disposed at a position sandwiched between the frame and the magnetic circuit, and is attached to the frame so as to be removable from the frame.
The speaker according to claim 1, wherein the wiring board can be removed from the frame when the magnetic circuit is separated from the frame. The speaker according to claim 1, wherein the LED is mounted on the annular wiring board and is disposed behind the diaphragm and outside the outer periphery of the damper.   3. The wiring board is attached to the back of the frame, with each LED being positioned in an opening provided in the frame at one location for each of the LEDs. Speaker. The speaker according to claim 1, 2 or 3, wherein a lead wire connecting the voice signal input terminal and the voice coil is fixed to the frame of the speaker at a position between the LEDs.

Images