JP2003037892A - Speaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a speaker to be used for various acoustic equipment capable of improving the productivity of a speaker. SOLUTION: This speaker is constituted like a polygon by working a yoke 23 by bending one sheet-shaped metallic material in order to arrange at least two bending and erecting parts. Thus, the material loss of the yoke 23 can be reduced, and the productivity of the yoke 23 and the speaker can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker used in various audio equipment and information communication equipment.

[0002]

2. Description of the Related Art In order to cope with the miniaturization of mobile phones, round speakers have been the mainstream in the past, but a substantially rectangular slim type as shown in FIGS. 7 and 8 has recently been drawing attention. .

That is, as shown in FIG. 8, a square-shaped magnet 1 is sandwiched by a square frame-shaped yoke 3 and a square plate-shaped upper plate 2 as shown in FIG. 7 to form a magnetic circuit 4. The yoke 3 of the magnetic circuit 4 is press-fitted into the frame 6, and an adhesive is interposed between the yokes 3 to bond them together. A vibrating plate 7 is adhered to the peripheral portion of the frame 6, a voice coil 8 for driving the vibrating plate 7 is coupled to the vibrating plate 7, and the voice coil 8 is coupled so as to fit into the magnetic gap 5. It was completed.

[0004]

In the above-mentioned speaker, since the yoke 3 is obtained by shaping the yoke 3 by multi-step former press working or cutting, it takes a lot of time and steps to produce the yoke 3. The productivity was reduced. Therefore, it has been a challenge to improve the productivity of the speaker in the future.

Therefore, the present invention aims to improve the productivity of the yoke and the speaker.

[0006]

In order to achieve this object, the present invention has the following constitution.

According to the first aspect of the present invention, the yoke is formed into a polygonal shape by bending one sheet of metal material and providing at least two or more bent and raised portions. . As a result, the material loss of the yoke can be reduced and the productivity of the yoke and the speaker can be improved.

According to the second aspect of the present invention, at least one or more recesses are provided in a part of the connecting portion of the outer peripheral portion of the yoke with the frame. The yoke is press-fitted into the frame, and an adhesive is interposed between the two. As a result, the adhesive accumulates in the concave portion on the outer peripheral portion of the yoke, so that the adhesive force between the yoke and the frame can be enhanced.

According to the third aspect of the present invention, at least one or more recesses are provided in a part of the connecting portion of the frame with the yoke. The yoke is press-fitted into this frame, and an adhesive agent is interposed between them. As a result, the adhesive accumulates in the concave portion of the frame, and the adhesive force between the yoke and the frame can be enhanced.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments 1 to 3 of the present invention will be described below.
Will be described with reference to the drawings. The description of each embodiment is the same as that of the first embodiment, and the description is simplified.

(First Embodiment) The first embodiment of the present invention will be described below, particularly, the invention described in claim 1. FIG. 1 is a perspective view of a yoke according to one embodiment of the present invention, and FIG. 2 is a sectional view of a speaker using the yoke.

The yoke 23 shown in FIG. 1 is formed into a bottomed square frame by bending one sheet-shaped metal material from which the outer shape has been removed in advance and providing four bent and raised portions 23A. It is a thing. In addition, the bent and raised portion 2
3A can be set at four or more locations. Furthermore, 2
It is also possible to construct a higher performance magnetic circuit by performing bending in more steps. Thereby, the material loss of the yoke 23 can be reduced and the productivity of the yoke 23 can be improved.

FIG. 2 is a sectional view of a speaker assembled using the yoke 23 obtained in FIG. As shown in FIG. 2, a rectangular magnet 21 is sandwiched by the yoke 23 and a square plate-shaped upper plate 22 to form a magnetic circuit 24. The yoke 23 of the magnetic circuit 24 is press-fitted into the frame 26, and an adhesive agent is interposed between the yokes 23 to couple them together. This frame 26
A vibration plate 27 is adhered to the peripheral edge of the vibration plate 27, a voice coil 28 for driving the vibration plate 27 is coupled to the vibration plate 27, and the voice coil 28 is coupled so as to fit into the magnetic gap 25.

According to the above construction, since the yoke 23 can be formed by bending the plate body, the productivity can be improved.

(Second Embodiment) The second embodiment of the present invention will be described below, particularly the invention described in claim 2. FIG. 3 is a perspective view of the yoke 23a according to the embodiment of the present invention, in which a concave portion 2 is formed at a part of a joint portion of the bending and raising portion 23A with the frame 26 as shown in FIGS.
3b is provided.

FIG. 4 is a sectional view of a speaker assembled using the yoke 23a obtained in FIG. The difference from the first embodiment is that when the magnetic circuit 24 assembled by using the yoke 23a is press-fitted into the frame 26, a part of the adhesive accumulates in the recess 23b, so that the adhesive layer becomes thicker. , Yoke 23a and frame 2
The adhesive strength of 6 can be enhanced.

(Third Embodiment) The third embodiment of the present invention will be described below with reference to the present invention.

FIG. 5 shows a frame 2 according to an embodiment of the present invention.
6a is a perspective view of FIG. This frame 26a
As shown in FIGS. 5 and 6, a concave portion 26b is provided in a part of the connecting portion with the yoke 23.

FIG. 6 shows the frame 26a obtained in FIG.
FIG. 6 shows a cross-sectional view of a speaker assembled using the. The difference from the first embodiment is that the assembled magnetic circuit 24 is press-fitted into the frame 26a and an adhesive is applied between the two, and at that time, the recess 26b of the frame 26a is formed.
Since the adhesive accumulates on the surface, the adhesive layer becomes thicker, and the adhesive force between the yoke 23 and the frame 26a can be strengthened.

[0020]

As described above, according to the present invention, the yoke is formed by bending one sheet of metal material and forming at least two bending and raising portions to form a polygonal shape. It is possible to reduce loss and improve the productivity of the yoke and the speaker.

Further, if a concave portion is provided in the outer peripheral portion of the yoke or a part of the frame, a part of the adhesive is accumulated in the concave portion, so that the adhesive layer becomes thicker and the adhesive force between the yoke and the frame is strengthened. You can

Therefore, the present invention can provide an excellent speaker which can realize high productivity, and its industrial value is extremely great.

[Brief description of drawings]

FIG. 1 is a perspective view of a yoke according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the speaker according to the first embodiment of the present invention.

FIG. 3 is a perspective view of a yoke according to the second embodiment of the present invention.

FIG. 4 is a sectional view of a speaker according to a second embodiment of the present invention.

FIG. 5 is a perspective view of a frame according to the third embodiment of the present invention.

FIG. 6 is a sectional view of a speaker according to a third embodiment of the present invention.

FIG. 7 is a perspective view of a conventional yoke.

FIG. 8 is a sectional view of a conventional speaker.

[Explanation of symbols]

21 magnet 22 Upper plate 23 York 23a York 23b recess 24 Magnetic circuit 25 magnetic gap 26 frames 26a frame 26b recess 27 diaphragm 28 voice coils

Claims (3)

[Claims] 1. A frame coupled to a magnetic circuit in which a magnet is sandwiched between an upper plate and a yoke, a diaphragm coupled to an outer peripheral portion of the frame, and a diaphragm coupled to the diaphragm. And a voice coil disposed in a magnetic gap of the magnetic circuit, wherein the yoke is formed by bending a sheet-shaped metal material to provide at least two bend-raised portions. A speaker with a polygonal shape. 2. The speaker according to claim 1, wherein at least one recess is provided in a part of the outer peripheral portion of the yoke which is connected to the frame, and an adhesive is applied between the yoke and the frame. 3. A part of the connecting portion of the frame with the yoke,
The speaker according to claim 1, wherein at least one recess is provided and an adhesive is applied between the frame and the yoke.