JPH0522793A - Speaker and manufacturing method thereof - Google Patents

Abstract

(57) [Abstract] [Purpose] The mechanical production is solved by solving the problem that the structure of the loudspeakers used in various audio equipment is complicated and cannot be mechanized, and by making the structure into blocks that can be independently assembled. It is an object of the present invention to provide a speaker and a method of manufacturing the same. A frame coupling body 14 having a guide portion for guiding and positioning the bottom portion of the frame 10 on the peripheral portion of the upper surface is coupled to at least an upper portion of a magnetic circuit having a magnetic gap 12, and the magnetic coupling body 14 is connected to the above-mentioned magnetic field. The voice coil 4, which fits in the magnetic gap 12 of the circuit, is positioned and attached to the peripheral portion of the damper 5 which holds the voice coil 4 in the central portion, and the frame 8 is provided with the vibration plate 8 coupled to the upper portion of the voice coil 4. By configuring the frame 10 in which the positioning portion to be installed by being guided and positioned by the guide portion of the frame combination body 14 is provided on the built-in bottom portion, the components constituting the speaker are divided into three blocks, and each of them is independently divided. It becomes possible to assemble,
It is possible to improve production efficiency by mechanization.

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 such as a radio and a television and a method for manufacturing the speaker.

[0002]

2. Description of the Related Art A conventional speaker will be described below with reference to the drawings.

FIG. 5 shows the structure of a conventional speaker. In FIG. 5, 1 is a magnet, 2 is a ring-shaped upper plate, and 3 is a lower plate having a center pole portion. A magnetic circuit having a narrow annular magnetic gap 12 is formed by the d-structure, and the frame 10 is coupled to this magnetic circuit. A voice coil 4 is fitted in the magnetic gap 12 and is supported by a damper 5 so as not to come into contact with the surroundings. Further, both ends of the winding wire of the voice coil 4 are connected to a gold thread wire 6 to withstand bending due to vertical vibration, and are drawn and connected to a terminal 7 connected to a frame 10. Further, the center portion of the diaphragm 8 is coupled to the upper portion of the voice coil 4, the peripheral portion is fixed to the frame 10, and the dust gap 9 is fixed to the upper surface of the voice coil coupling portion of the diaphragm 8. .

A method of manufacturing the conventional speaker thus configured will be described below. First, as shown in FIG. 6, the terminal 7 is attached to the frame 10 by caulking or the like, and the magnet 1 and the lower plate 3 are coupled to each other in the intermediate assembly in which the upper plate 2 is coupled to form the magnetic gap 12, An assembly having the shape shown in FIG. 6 is obtained.

Next, as shown in FIG. 7, an intermediate assembly in which the voice coil 4 and the damper 5 are combined is adhered to the frame 10. At this time, in order to fit the voice coil 4 into the magnetic gap 12 while keeping a clearance of 0.1 to 0.2 mm in the diametrical direction from each of the upper plate 2 and the lower plate 3, a thin-walled cylindrical gauge 11 is usually used. A method is generally used in which the gauge 11 is removed after being assembled and assembled and cured by adhesion.

Next, as shown in FIG. 8, a gold thread wire 6 previously connected and fixed to the upper portion of the voice coil 4 is attached to the frame 1.
The connection is made by passing through a hole or a notch provided in the terminal 7 connected to 0, with an appropriate degree of slack so as not to prevent vibration in the central axis direction, and connecting by soldering. Note that these operations are generally difficult to perform with a machine, and often rely on manual work that requires skill.

Next, as shown in FIG. 9, the vibrating plate 8 is incorporated from above, the peripheral edge of the vibrating plate 8 is bonded to the peripheral edge of the frame 10, and the central part is bonded to the upper part of the voice coil 4 to bond it. Cure. After that, the gauge 11 was pulled out, and the dust cap 9 was attached to prevent intrusion of dust and dust, and the assembly was performed.

[0008]

However, in the above-described conventional speaker configuration, all the steps are continuous with the drying step interposed between the manufacturing steps. Therefore, the shape in which the frame 10 is coupled to the magnetic circuit is formed in the drying step. Since it passes through the dryer, the size of equipment and lines becomes long, and the volume of the dryer becomes large. Therefore, there are problems that the required area for production becomes large, the equipment becomes expensive, and the longer the drying time, the better the effect on quality cannot be.

Further, since the frame 10 and the magnetic circuit having various shapes and sizes must be connected at the initial stage of assembly, the subsequent assembly work cannot be advanced, so that the subsequent assembly work has various influences depending on the shape and size of the frame 10. As a result, mechanization is difficult, and since productivity cannot be significantly improved, there is a problem that cost competitiveness is gradually decreasing.

An object of the present invention is to solve the above problems, and to provide a speaker having good productivity and capable of significantly reducing the manufacturing cost, and a manufacturing method thereof.

[0011]

In order to solve this problem, a speaker and a method of manufacturing the same according to the present invention are provided with a guide for guiding and positioning the bottom of a frame at the peripheral edge of the upper surface of at least the upper part of a magnetic circuit having a magnetic gap. A frame coupling body provided with a portion is coupled to the frame coupling body, and a peripheral edge portion of a damper holding a voice coil fitted in a magnetic gap of the magnetic circuit in the central portion is positioned and attached to the frame coupling body. A vibration plate coupled to the upper part of the voice coil is incorporated and a frame is coupled to a bottom portion and a positioning portion is provided to be guided and positioned by the guide portion of the frame coupling body.

[0012]

With this configuration, when assembling the speaker, the speaker is divided into three blocks of the magnetic circuit, the combined product of the voice coil and the damper, and the combined product of the frame and the diaphragm, and the assembly work is performed in each independent process. In the final step, these can be combined to assemble the speaker.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A speaker and a method of manufacturing the same according to an embodiment of the present invention will be described below with reference to the drawings. In addition,
The same numbers are given to parts having the same configurations as the parts shown in the conventional example. 1 (a) to 1 (c) are cross-sectional views showing a configuration of a speaker according to the present invention, (a) is a magnetic circuit, (b) is a combination product of a voice coil and a damper, and (c) is a frame and a diaphragm. Shows the combined product.

In FIG. 1A, reference numeral 1 is a ring-shaped magnet, and an upper plate 2 and a lower plate 3 having a center pole portion are overlapped with each other by sandwiching the magnet 1 to form a magnetic gap 12. A circuit connecting member is connected to a frame connecting member 14 having a guide portion for guiding and positioning the bottom portion of the frame 10 at the peripheral portion of the upper surface at least at the upper portion of the magnetic circuit. In this structure, the groove 13 is formed over the entire circumference of the upper surface of 14. The magnetic circuit configured in this way is called a block I
The block I is formed by inserting the upper plate 2 into the frame assembly 14 and then adhering it to the magnet 1 and the lower plate 3, or by forming the frame assembly 14 by itself with resin, metal or the like. It can be obtained by combining with. Alternatively, it may be wrapped with a resin or the like and integrally molded.

FIG. 1 (b) shows that the voice coil 4 is held by using a thin-walled cylindrical gauge 11, and a damper 5 is connected to the outer periphery of the voice coil 4 by a method such as bonding. Is called Block II.

FIG. 1C shows the vibrating plate 8 fixed to the peripheral edge of the frame 10.
At the bottom of 0, a brim 15 is provided over the entire circumference as a positioning portion with the frame coupling body 14 of the magnetic circuit,
This assembly is called block III. The guide portion of the frame assembly 14 and the positioning portion on the bottom of the frame 10 need not be limited to the fitting of the concavities and convexities, but can be positioned by an appropriate method.

The three blocks I, II, and III thus prepared are assembled as follows.

First, the block I in FIG.
Overlay block II in (b). At this time, the gauge 11 is positioned so as to fit into the center pole portion of the lower plate 3, the peripheral edge of the damper 5 is bonded to the frame assembly 14, and the gauge 11 is still attached. In this way, the voice coil 4 is fitted into the magnetic gap 12 which requires dimensional accuracy on the order of 1/100 mm.

The gold thread wire 6 fixedly connected to the voice coil 4 is connected to the terminal 7 with an appropriate slack. The connection of the gold thread wire 6 was difficult for the frame to interfere with the conventional speaker structure. However, in the structure of the present invention, the frame 10 is not connected, and therefore the terminal 7 is provided in the frame combination body 14. By doing so, it is extremely easy to perform and it is easy to recommend mechanization. The intermediate assembled state at this time is shown in FIG. Further, as shown in FIG. 1A, the terminal 7 arranged by insert molding in the frame combined body 14 penetrates the boundary of the connecting portion with the frame 10, and one has an exposed end on the inner side and the other on the outer side. With the structure, the gold thread wire 6 guided from the voice coil 4 is connected to the terminal 7 on the inner peripheral side without passing over the joint portion, so that the joint with the frame 10 is not hindered.

Finally, the block III of FIG. 1 (c) is overlapped from the top with the central axes aligned with each other, and the brim 15 provided as a positioning portion of the frame 10 is fitted into the groove 13 of the guide portion of the frame assembly 14 to be bonded, The assembly of the main parts is completed by joining them by methods such as welding, welding, and caulking. At this time, the fitting tolerance between the outer periphery of the voice coil 4 and the center hole of the diaphragm 8 is sufficient to be accurate to the order of 1/10 mm,
Economical assembly of the speaker can be realized with the processing accuracy of the joint portions provided on the frame joint body 14 and the frame 10. Further, at this time, the frame 10 may be first coupled to the blocks I and II, and the diaphragm 8 may be incorporated later.

After that, after the adhesive is injected into the joint between the diaphragm 8 and the voice coil 4 and cured, the gauge 11 is removed, and the dust cap 9 is attached to the center of the diaphragm to obtain the final product shape. It is composed of.

FIG. 4 is a cross-sectional view showing the structure of a speaker when a wiring method generally called an indirect lead method is used. Even when the structure of the present invention is applied to a speaker having such a structure. Although detailed description is omitted, it is possible to obtain the same effect as the above embodiment.

In the above embodiment, the frame assembly 1 is used.
4 shows a case in which the frame 10 is made of a thermoplastic resin material and the frame 10 is made of a cold-rolled steel sheet, and the two are joined by high-frequency heat welding, but this joining can also be done by screws, caulking or other methods. This is possible, and the optimum joining method may be selected depending on the materials used.

Further, the frame combined body 14 is molded with the upper plate 2 placed in the molding die of the frame combined body 14 so as to combine both parts at the same time, and at the same time the terminal 7 is also insert-molded into the frame combined body 14. However, as shown in FIG. 3, the lower plate 3, the magnet, and the upper plate 2 which are stacked by using a jig are put in a molding die of the frame assembly 14 and the outer surface is made of resin. The frame combined body 14 may be formed by integrally molding in a wrapping shape. Alternatively, the frame assembly 14 may have a structure capable of supporting the terminal, and the terminal 7 may be added later.

By thus dividing the parts constituting the loudspeaker into blocks and assembling them, and finally overlapping and coupling the blocks, the loudspeaker can be easily assembled without a large production space or sophisticated mechanical equipment. It will be.

[0026]

As described above, the speaker and the method of manufacturing the same according to the present invention can adopt an assembling method in which parts constituting the speaker are divided into three blocks to proceed with assembly, and finally they are superposed and joined together. Because of the structure, the individual blocks are easily assembled, and basically, the simple one-way assembly of stacking the blocks is realized,
Easy to save labor by using a machine.

In addition, several types of standardized magnetic circuits, voice coils, and damper combinations are prepared, and only the frame and diaphragm are sized, shaped (circle / oval), depth, mounting holes, and Variety can be obtained very easily by combining them with variations to meet various demands such as colors and finally combining them.

Further, since it is possible to superimpose the intermediate assemblies which are divided into respective blocks and assembled at different places to form a final product, a large factory area and equipment are required for the division of labor and final assembly. Instead, only the required blocks are sent to the required places, and the speaker is assembled so that a production form that cannot be considered with the conventional structure can be realized.

[Brief description of drawings]

1A is a cross-sectional view of a magnetic circuit showing a configuration of a speaker block I according to an embodiment of the present invention, and FIG. 1B is a voice coil and a damper showing a configuration of a speaker block II according to an embodiment of the present invention. Sectional view of combined state (c) Block III of speaker according to one embodiment of the present invention
Sectional view showing the structure of the frame and the diaphragm combined

FIG. 2 is a partially cutaway perspective view of the blocks I and II of FIG. 1 after assembling.

FIG. 3 is a sectional view of the blocks I, II, and III of FIG. 1 after assembling.

FIG. 4 is a sectional view of each block according to another embodiment of the speaker of the present invention.

FIG. 5 is a sectional view showing the structure of a conventional speaker.

FIG. 6 is a cross-sectional view of a conventional speaker magnetic circuit with a frame coupled thereto.

FIG. 7 is a partial cross-sectional view of a vibrating component incorporated in FIG.

FIG. 8 is a partially cutaway perspective view showing a connection state of the gold thread wire of FIG.

FIG. 9 is a cross-sectional view of what is shown in FIG. 8 in which a diaphragm is incorporated.

FIG. 10 is a cross-sectional view of a conventional structure with a different wiring method.

[Explanation of symbols]

1 magnet 2 Upper plate 3 Lower plate 4 voice coils 5 damper 6 Gold wire 7 terminals 8 diaphragm 9 Dust cap 10 frames 11 gauge 12 magnetic gap 13 groove 14 frame combination 15 brim

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Asahiko Okada             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Yoshinobu Chigiku             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Teru Kawahara             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Hideaki Inoue             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Shinya Mizone             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd. (72) Inventor Eiichi Morimoto             1006 Kadoma, Kadoma-shi, Osaka Matsushita Electric             Sangyo Co., Ltd.

Claims (3)

[Claims] 1. A frame coupling body having a guide portion for guiding and positioning a bottom portion of a frame on a peripheral portion of an upper surface is coupled to at least an upper portion of a magnetic circuit having a magnetic gap, and the frame coupling body is connected to the frame coupling body. Position and attach the peripheral edge of the damper that holds the voice coil that fits in the magnetic gap in the center, and install the diaphragm that is connected to the upper part of the voice coil to this frame combination body and guide the frame combination body to the bottom part. A frame-coupled speaker provided with a positioning portion which is guided and positioned by a portion to be incorporated. 2. The speaker according to claim 1, wherein the frame combination has a structure in which a terminal is incorporated in the frame combination or a terminal is added to support the frame combination. 3. A magnetic circuit having a magnetic gap, to which at least an upper portion of the magnetic circuit is provided, a frame coupling body provided with a guide portion for guiding and positioning the bottom portion of the frame is joined to the peripheral portion of the upper surface. A frame having a damper having a voice coil fitted in the magnetic gap and held in the center is positioned and incorporated, and then a frame in which the peripheral edge of the diaphragm is previously coupled is used by using the positioning portion provided at the bottom of the frame. The method of manufacturing a speaker in which the frame and the frame combined body are combined with each other, and the diaphragm and the upper portion of the voice coil are adhesively bonded together.