JP2001359189A - Recyclable speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker which can be strongly assembled but easily disassembled without bonding with adhesives, caulking or welding the magnet, plate, pole piece and the frame of the speaker. SOLUTION: A speaker 1 is provided with a magnetic circuit 5 having a magnet 2, a plate 3 and a pole piece 4, a frame 6, a cover 7 for sandwiching the magnetic circuit together with the frame and a means for joining the magnet, plate, pole piece, frame and cover without using adhesives.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker which is formed to be separable and suitable for recycling.

[0002]

2. Description of the Related Art Conventionally, a magnetic circuit of a speaker is composed of a magnet, a plate, and a pole piece, and a voice coil connected to a diaphragm is provided in a magnetic gap which is a gap between the plate and the pole piece. Is arranged at one end. Magnetic flux flows to the magnet, plate, and pole piece, and current flows through the voice coil, so that the diaphragm vibrates. In a conventional speaker,
The magnet, the plate, and the pole piece, which are magnetic circuits, are respectively joined using an adhesive. Further, the magnetic circuit joined by the adhesive is joined by caulking or welding to the frame. Alternatively, the magnetic circuit is bonded to the frame by an adhesive.

[0003]

In recent years, environmental problems have been emphasized in recent years, and recycling techniques and recyclable products have been proposed in all technical fields. The same is true for speakers, and speakers that are suitable for recycling will attract more and more attention in the future. However, in the conventional speaker, since the magnet, the plate, and the pole piece are joined using an adhesive, it is extremely difficult to separate them. Further, since the magnetic circuit and the frame are joined by caulking or welding, it is extremely difficult to separate the magnetic circuit from the frame. Therefore,
Conventional loudspeakers are not suitable for recycling or sorting and disposal. In addition, since the adhesive is used, the applied amount of the adhesive may be uneven, and when the applied amount of the adhesive is small, the joining strength of the magnet, the plate, and the pole piece is weakened. is there. further,
Since the adhesive needs to be dried, not only does the production time become longer, but also the step of joining the magnetic circuit with the adhesive,
A step of caulking or welding the magnetic circuit and the frame is required, and the number of steps is large, so that there is a problem that the manufacturing efficiency is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and has as its object to join, caulk, or weld a speaker magnet, plate, pole piece, and frame with an adhesive. It is an object of the present invention to provide a speaker which can be firmly joined without being separated and can be easily separated.

[0005]

A speaker according to the present invention comprises a magnetic circuit having a magnet, a plate, and a pole piece, a frame, a cover sandwiching the magnetic circuit with the frame, the magnet, the plate, Joining means for joining the pole piece, the frame, and the cover without using an adhesive.

[0006] In a preferred embodiment, the joining means has a joining claw provided on the frame and a joining groove defined on the cover and engaged with the joining claw.

In a preferred embodiment, the joining means has a joining groove defined in the frame, and a joining claw provided on the cover and engaging with the joining groove.

[0008] In a preferred embodiment, by releasing the engagement state of the joining means, the magnet,
The plate, the pole piece, the frame, and the cover are disassembled.

[0009] In a preferred embodiment, the speaker further includes positioning means for determining a joint position at each joint of the magnet, the plate, the pole piece, the frame, and the cover.

The operation of the present invention will be described below. In the speaker according to the present invention, since the magnet, the plate, and the pole piece can be sandwiched between the frame and the cover and joined to each other by the joining means, there is no need to use an adhesive, caulking, or welding. Therefore,
By releasing the joined state (for example, the engaged state) by the joining means, the speaker can be easily disassembled,
Parts can be discarded separately or reused. In addition, when the speaker is used, the state in which the speakers are firmly joined is maintained. Furthermore, since no adhesive is used, it is possible to prevent a decrease in bonding strength due to uneven application of the adhesive. Further, since a step of drying the adhesive and a step of caulking or welding the magnetic circuit and the frame are not required, the number of manufacturing steps and manufacturing time can be reduced, and manufacturing efficiency can be improved.

For example, as the joining means, the speaker can be joined by engaging the joining claw portion and the joining groove portion. Therefore, the speaker can be disassembled by releasing the respective engagement states.

Preferably, the loudspeaker is provided with a positioning means, so that the joint position can be determined very accurately by matching the convex and concave portions provided on each member. Further, when the speaker falls, it is possible to prevent the magnetic circuit from being displaced extremely well.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to FIGS. 1 to 5, but the present invention is not limited to these embodiments.

(Embodiment 1) FIG. 1 is a sectional view showing a speaker according to a first embodiment of the present invention. FIG. 2 (a)
FIG. 3 is an enlarged cross-sectional view illustrating a main part of the speaker according to the present embodiment. The speaker 1 includes a magnet 2, a plate 3, a magnetic circuit 5 having a pole piece 4, a frame 6, a cover 7, a diaphragm 8, a damper 9, and a voice coil 10.
It has. One end of the voice coil 10 is arranged in a magnetic gap defined between the plate 3 and the pole piece 4. The diaphragm 8 and the damper 9 are connected to the voice coil 10 in a usual manner. In the magnetic circuit 5, the magnetic flux from the magnet 2 flows to the plate 3, the magnetic gap, and the pole piece 4. Therefore, the diaphragm 8 can be driven by passing a current through the voice coil 10.

The magnet 2, the plate 3, and the pole piece 4 are installed in the cover 7 without using an adhesive. First, the pole piece 4 is set in the cover 7, and the ring-shaped magnet 2 and the ring-shaped plate 3 are set on the pole piece 4.

As the material of the magnet 2, any suitable material such as neodymium or ferrite can be adopted depending on the application, but neodymium is preferably used. This is because the neodymium magnet can be easily formed into a shape, so that the positioning means can be easily formed as described later.

The cover 7 is used to sandwich the magnet 2, the plate 3, and the pole piece 4 together with the frame 6. The cover 7 is typically made of resin. Preferably, in the cover 7, a concave portion 11 is defined in a portion of the inner bottom surface where the pole piece 4 is installed. When the pole piece 4 is installed on the cover 7, the joining strength can be increased by installing the pole piece 4 in the recess 11, and the magnetic circuit 5 can be used when an impact such as a drop is applied.
This is because the displacement can be prevented. Further, when the magnetic circuit 5 is installed on the cover 7, it can be joined at an accurate position.

The frame 6 is installed above the magnetic circuit 5 (the upper part of the plate 3), and sandwiches each part of the magnetic circuit 5 together with the cover 7. Preferably, the frame 6 is formed from an elastic material (details will be described later). Typically, a resin frame can be used as the elastic frame 6.

The speaker 1 is further provided with a joining means 12 for joining the magnetic circuit 5, the frame 6, and the cover 7. The joining means 12 has, for example, a joining claw 13 provided on the frame 6 and a joining groove 14 defined on the cover 7.

The joining claw 13 is formed so as to protrude from the bottom of the frame 6 on the surface that sandwiches the magnetic circuit 5. The joining claw portion 13 has a hook shape (L-shaped vertical shape) that can engage with the joining groove portion 14 as shown in FIG. 2A, for example. The plurality of joining claws 13 are provided on the circumference of the frame bottom portion, and preferably, each is provided at equal intervals for more firm joining. Hook 1 of joining claw 13
The length 3a may be any length as long as it can be engaged, but preferably protrudes outward from the cover in an engagement state with the joining groove 14 so that the engagement can be easily released.

The joining groove 14 is defined in the cover 7 so that the joining claw 13 can be engaged. Groove 1 for joining
4 is the number corresponding to the joining claw portion 13,
It is specified in a corresponding shape.

Hereinafter, the speaker 1 is connected by the joining means 12.
The joining method will be described. To join the loudspeakers 1, the joining claws 13 are pressed in the center (A) direction. With the joining claws 13 pressed, the frame 6 is installed above the magnetic circuit 5 installed in the cover 7, and each part of the magnetic circuit 5 is sandwiched between the frame 6 and the cover 7. Then, with the magnetic circuit 5, the frame 6, and the cover 7 in close contact with each other, the pressing force against the joining claw 13 is released at a position where the joining claw 13 corresponds to the joining groove 14. Then, the joining claw 13 is engaged with the joining groove 14. When the joining claws 13 are engaged with the joining grooves 14, the state in which the magnet 2, the plate 3, and the pole piece 4 are sandwiched between the frame 6 and the cover 7 is maintained, so that the speaker 1 is joined. . Thus, the magnet 2, the plate 3, the pole piece 4, the frame 6, and the cover 7 are maintained in a firmly joined state.

Further, the speaker 1 can be disassembled only by releasing the engagement state by the joining means. This is because the speaker 1 does not use an adhesive to join the magnet 2, the plate 3, and the pole piece 4, and does not use caulking or welding to join the plate 2 and the frame 6.

Hereinafter, a method of disassembling the speaker 1 will be described. In order to disassemble the speaker 1, the joining claw 13
Is pressed again in the center (A) direction to release the engagement between the joining claw 13 and the joining groove 14. Thus, the frame 6
Is released from the state where the magnet 2, the plate 3, and the pole piece 4 are sandwiched between the speaker 1 and the cover 7.
Is easily disassembled.

As described above, preferably, the frame 6 is formed of an elastic material. Magnet 2,
When the joining claw 13 provided on the frame 6 is pressed to join or disassemble the plate 3, the pole piece 4, the frame 6, and the cover 7, the joining claw 13 returns to its original shape due to elasticity. Because you can. Since the joining claw 13 can be returned to the original shape, the joining claw 13 can be engaged with the joining groove 14, and the frame 6 can be reused after disassembly. Therefore, the speaker 1
The magnet 2, the plate 3, the pole piece 4, the frame 6, and the cover 7 can be attached and detached any number of times.

Preferably, the loudspeaker 1 is a positioning means 1
5 is provided. The positioning means 15 includes the magnet 2,
It is provided for accurately determining a position where each member is to be joined at each joint of the plate 3, the pole piece 4, the frame 6, and the cover 7.

The positioning means 15 is, for example, as shown in FIG.
As shown in the figure, a ring-shaped groove 16 is defined on the lower surface of the plate 3 at the joint between the plate 3 and the magnet 2,
A ring-shaped projection 17 is provided on the upper surface of the magnet 2.
Also, at the joint between the plate 3 and the magnet 2,
A ring-shaped protrusion may be provided on the plate 3 and a ring-shaped groove may be defined on the magnet 2. The positions where the ring-shaped groove 16 and the ring-shaped protrusion 17 are provided correspond to each other.
Since the speaker 1 is provided with the positioning means 15, when the plate 3 is installed on the magnet 2, by joining them so that the ring-shaped projections 16 are aligned with the ring-shaped grooves 16, the joining position is determined very accurately. be able to. Therefore, the magnet 2
And the plate 3 can be prevented from being joined at a position shifted from the joining position. Further, it is possible to prevent the displacement of each member when the speaker is dropped or used for a long time. Preferably, as shown in FIG. 2A, positioning means 15 is also provided at other joints (the frame 6 and the plate 3, the magnet 2 and the pole piece 4, and the pole piece 4 and the cover 7).

Further, as another embodiment of the speaker having the positioning means 15, a concave portion may be provided on the lower surface of the plate 3 and a convex portion may be provided on the upper surface of the magnet 2 instead of a ring shape. The positions and the numbers of the projections and the depressions correspond to each other.

FIG. 2B is a sectional view showing still another embodiment of the speaker 1 having the positioning means 15. Through holes 18 are defined in the magnet 2, the plate 3, the pole piece 4, and the frame 6. The cover 7 is provided with pillar portions 19 penetrating through the respective through holes 18. Each through hole 18 is defined at a position corresponding to the column 19 so as to penetrate the column 19. Further, a recess 20 is provided in the center of the pole piece 4 and a recess 2 is provided in the cover 7.
The projection 21 is provided at a position corresponding to 0. The speaker 1 has the pillar portion 19 in the through hole 18 and the convex portion 21
Are respectively joined to the concave portions 20. Since the pillars 19 penetrate the respective through holes 18 by the positioning means 15, it is possible to determine the joining position of each member very accurately and further prevent the magnetic circuit from being displaced.

(Embodiment 2) Next, a speaker according to a second embodiment of the present invention will be described. FIG. 3 is a sectional view showing a main part of the speaker according to the second embodiment of the present invention. The speaker according to the second embodiment is the same as the speaker according to the first embodiment except for the joining means.

The joining means 12 has a joining groove 22 defined in the frame 6 and a joining claw 23 protruding from the outer peripheral portion of the cover 7. Similarly to the first embodiment, the joining claw 23 is formed so as to be able to engage with the joining groove 22. In order to join the speaker 1 by the joining means 12, the members of the magnetic circuit 5 are installed in the cover 7 and the frame 6 is pressed while pressing the joining claw 23 provided on the cover 7 in the center (A) direction. And the cover 7 sandwich each member of the magnetic circuit 5. And the joining claw 23
At the position corresponding to the joining groove 22 eliminates pressing against the joining claw 23. Thus, the joining claw 23 is engaged with the joining groove 22, and the members of the magnetic circuit 5, the frame 6, and the cover 7 are joined. Next, in order to disassemble the speaker 1, the joining claw 23 is pressed again in the center (A) direction, and the engagement between the joining claw 23 and the joining groove 22 is released.

In this embodiment, the cover 7 is made of a material having elasticity. This is because when the speaker 1 is pressed against the joining claw 23 in order to join or disassemble the speaker 1, the joining claw 23 can return to the original shape. For example, a resin cover is used as the cover 7 having elasticity. The frame 6 may be made of any appropriate material as long as the material can define the joining groove 22. For example, as the frame 6, a resin frame or a metal frame such as an iron or aluminum alloy is used. When an iron frame is used, it is inexpensive and has excellent heat dissipation.

(Embodiment 3) Next, a speaker according to a third embodiment of the present invention will be described. FIG. 4A is a sectional view showing a main part of a speaker according to a third embodiment of the present invention. FIG. 4B is a plan view showing the bottom of the frame 6 of the speaker according to the present embodiment. FIG. 4 (c)
FIG. 3 is a plan view showing an upper part of a cover 7 of the speaker according to the present embodiment. 4B and 4C, BB
A cross section taken along a line corresponds to FIG. The speaker according to the third embodiment is the same as the speaker according to the first embodiment except for the joining unit.

The joining means 12 has a fitting projection 24 provided on the bottom of the frame 6, an insertion portion 25 defined on the cover 7, and a fitting groove 26. The fitting protrusion 24 is provided so as to protrude in the outer peripheral direction at the bottom of the frame 6. A plurality of fitting projections 24 are provided, and preferably,
Each is provided at equal intervals in order to further improve the bonding strength.

The insertion portion 25 is defined to be open above the cover 7 so that the fitting projection 24 can be inserted. Also,
The insertion portion 25 is formed by inserting the inserted fitting convex portion 24 into the fitting groove portion 26.
It has the role of leading to The insertion portion 25 includes the fitting protrusion 2
4 is defined to be wider than the fitting projection 24 so as to insert the fitting protrusion 4.

The fitting projection 24 is fitted into the fitting groove 26. The fitting groove portion 26 is defined in the cover 7 adjacent to the insertion portion 25 as shown by a broken line in FIG.
The fitting groove 26 has a vertical width that is equal to or less than the vertical width of the fitting protrusion 24, and is defined such that the fitting protrusion 24 can be fitted.
The insertion portion 25 and the fitting groove 26 are respectively
No. 4 is defined.

Hereinafter, a method of joining the loudspeakers 1 by the joining means 12 will be described. After each member of the magnetic circuit 5 is installed in the cover 7, the frame 6 is arranged above the magnetic circuit 5 so that the fitting projection 24 is inserted into the insertion portion 25. Thus, each member of the magnetic circuit 5 is sandwiched between the frame 6 and the cover 7. Further, with the members of the magnetic circuit 5, the cover 7 and the frame 6 being in close contact with each other, the frame 6
Is rotated in the C direction. Since the vertical width of the fitting groove 26 is equal to or less than the vertical width of the fitting convex 24, the fitting convex 24 fits into the fitting groove 26 by rotating the frame 6 in the C direction. By fitting the fitting projection 24 into the fitting groove 26, the state where the magnet 2, the plate 3, and the pole piece 4 are sandwiched between the frame 6 and the cover 7 is maintained, and the speaker 1 is joined.

Next, a method of disassembling the speaker 1 will be described. In the speaker 1, the frame 6 is rotated in the direction D, and the fitting between the fitting protrusion 24 and the fitting groove 26 is released. Thus, the state where the magnet 2, the plate 3, and the pole piece 4 are sandwiched between the frame 6 and the cover 7 is released, and the speaker 1 is disassembled. Since no adhesive is used for joining the magnet 2, the plate 3, and the pole piece 4, and no caulking or welding is used for joining the plate 3 and the frame 6, each can be easily disassembled.

(Embodiment 4) Next, a speaker according to a fourth embodiment of the present invention will be described. FIG. 5 is a sectional view showing a main part of a speaker according to a fourth embodiment of the present invention. The speaker according to the fourth embodiment is the same as the speaker according to the first embodiment except for the joining unit.

As the joining means 12, a screw connection is used. For example, the joining means 12 includes a female screw 27 provided on the inner peripheral portion of the cover 7, the pole piece 4, the plate 3, and a male screw 28 provided on the outer peripheral portion of the frame 6.

Hereinafter, a method of joining the loudspeakers 1 by the joining means 12 will be described. The pole piece 4 and the cover 7 are screwed together, and the pole piece 4 is set in the cover 7. Next, the magnet 2 is set on the pole piece 4. Further, the plate 3 and the cover 7 are screwed together,
The plate 3 is set on the magnet 2. Thus, the magnet 2 having no screw is also sandwiched between the plate 3 and the pole piece 4 and joined to each other. Next, the frame 6 and the cover 7 are screwed together, and the frame 6 is set on the plate 3. Thus, each member of the magnetic circuit 5 is sandwiched between the frame 6 and the cover 7. As described above, by screwing the pole piece 4, the plate 3, and the frame 6 to the cover 7, the members of the magnetic circuit 5 are kept sandwiched between the frame 6 and the cover 7. Joined.

Next, a method of disassembling the speaker 1 will be described. To disassemble the speaker 1, the screwing of the frame 6 and the cover 7 is released, and the frame 6 is removed from the upper part of the plate 3. The plate 3 and the pole piece 4 can be disassembled by releasing the screwing in the same manner.

[0043]

According to the speaker of the present invention, the magnet, the plate, and the pole piece can be sandwiched between the frame and the cover and can be joined to each other by the joining means, so that it is not necessary to use an adhesive, caulking, or welding. . Therefore, by releasing the joined state (for example, the engaged state) of the joining means, each can be easily disassembled.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a speaker according to a first embodiment of the present invention.

FIG. 2A is a cross-sectional view illustrating a main part of the speaker according to the first embodiment. (B) is sectional drawing explaining another Example of a joining means.

FIG. 3 is a sectional view showing a speaker according to a second embodiment of the present invention.

FIG. 4A is a cross-sectional view illustrating a speaker according to a third embodiment of the present invention. (B) is a top view showing the bottom of the frame of the speaker according to the third embodiment.
(C) is a top view showing the upper part of the cover of the speaker by a 3rd embodiment.

FIG. 5 is a sectional view showing a speaker according to a fourth embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 speaker 2 magnet 3 plate 4 pole piece 5 magnetic circuit 6 frame 7 cover 12 joining means 13, 23 joining claw 14, 22 joining groove 15 positioning means

Claims (5)

[Claims] 1. A magnetic circuit having a magnet, a plate, and a pole piece, a frame, a cover sandwiching the magnetic circuit with the frame, the magnet, the plate, the pole piece, the frame, and the cover. And a joining means for joining the two without using an adhesive. 2. The loudspeaker according to claim 1, wherein said joining means has a joining claw provided on said frame, and a joining groove defined by said cover and engaged with said joining claw. . 3. The speaker according to claim 1, wherein said joining means has a joining groove defined on said frame and a joining claw provided on said cover and engaging with said joining groove. 4. The speaker according to claim 2, wherein the magnet, the plate, the pole piece, the frame, and the cover are disassembled by releasing the engagement state of the joining means. 5. The apparatus according to claim 1, further comprising positioning means for determining a joint position at each joint of said magnet, said plate, said pole piece, said frame and said cover. Speaker.