JPS6165597A - Manufacturing method of flat speaker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a flat speaker unit that reduces gap rubbing defects in a flat speaker unit.

The structure of the conventional example and its problems The conventional method of manufacturing a flat-plate speaker will be explained below. Figure 1 is a half-sectional view of a speaker according to the assembly procedure of the conventional method of manufacturing a flat-plate speaker, and 1 is a yoke. , has a fledge part 2 and a center pole part 3.

4 is a magnet, 6 is a plate with a through hole in the center, 6
is its inner peripheral surface. 7 is voice coil bobbin, sid
The voice coil, 9, is mounted on the plate in the frame. Reference numeral 1o denotes a center holder, which is fixed to the voice coil 7 and the frame 9 at the inner and outer peripheries, respectively. 11 is a coupling cone whose inner peripheral portion is fixed to the voice coil bobbin 7. 1
Reference numeral 2 denotes a collar provided on the outer periphery of the coupling cone 11, which is joined to the flat diaphragm 13. 14 is an edge, the inner circumference of which is the flat diaphragm 13, and the outer circumference 15 of which is the frame 9.
The outer circumferential flat portion 16 of

The flat plate diaphragm 13 and the edge 14 constitute a prepared diaphragm 17 which has been bonded in advance.

A method of assembling the speaker configured as above will be described below. First, the field part 1 and the frame 9 are joined. Next, the center holder 10, the voice coil bobbin 7, and the turnip puller 711 are each joined to form a prepared part, and then the bobbin spacer 18 is placed over the center pole 3, and the voice coil bobbin 7fj, which is the prepared part! : Insert into the outer periphery of the bobbin spacer 18. At the same time, the outer periphery of the center holder 1o is fixed to the frame 9. After that, install bobbin spacer 1
Remove all 8. Next, the entire diaphragm 13 and edge outer periphery 15 of the prepared diaphragm 17 are fixed to the coupling cone flange 12 and the frame outer periphery 16, respectively. If the flat diaphragm 13 is not fixed vertically, the central axis of the voice coil bobbin 7 will be tilted with respect to the central axis of the center pole 3, causing the inner periphery of the voice coil bobbin 7 and the outer periphery of the center pole 3 to come into contact, or the voice coil 8 and the inner circumferential surface 6 of the grate through-hole 6 come into contact with each other, resulting in a phenomenon called gap rubbing, resulting in the production of defective products.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a method for manufacturing a flat speaker that can reduce gap rubbing defects.

Structure of the Invention The present invention is a method for manufacturing a flat speaker using a coupling cone with a through hole and a plurality of ribbon spacers, i. After removing the bobbin spacer or in place of the bobbin spacer, one end of the plurality of ribbon spacers is placed in the center. By inserting the ribbon spacer between the ball and the voice coil bobbin, leaving the other end out through the through hole of the coupling cone, and removing all the ribbon spacers after assembly is complete, gap rubbing defects can be greatly reduced. .

DESCRIPTION OF EMBODIMENTS FIG. 2 is a half-sectional view showing a method of manufacturing a flat speaker according to an embodiment of the present invention. In Fig. 2, 1 is a yoke, 2 is a flange thereof, 3 is a center pole part, 4 is a magnet, 5 is a plate, 6 is an inner peripheral surface of a through hole, 7 is a voice coil bobbin, 8 is a voice coil, and 9 is a Frame, 10 is a center holder, 11 is a campling cone, 12
13 is the flat plate diaphragm, 14 is the edge, 15
16 is a flat outer periphery of the frame 9, and 17 is a prepared diaphragm, which are the same as those of the conventional example. 18 is a bobbin spacer. Reference numeral 19 denotes a ribbon spacer, which has a simple rectangular shape as shown in FIG. 3. This is a metal or plastic film with a thickness of about 100 μm to 200 μm, and its thickness varies depending on the voice coil diameter of the target speaker unit. length is 2
Approximately 00 rtrm is appropriate. Reference numeral 20 denotes a through hole formed in the coupling cone 11 into which one end of the ribbon spacer 19 is inserted.

A method of manufacturing the flat speaker of this embodiment configured as described above will be described below.

First, the field part 1 and the frame 9 are joined. Next, center holder 10, voice coil bobbin 7, coupling cone 11
After joining each to form a prepared part, the bobbin spacer 18 is placed over the center pole 3, and the voice coil bobbin of the prepared part is inserted into the outer periphery of the bobbin spacer 18. At the same time, the outer periphery of the center holder 10 is fixed to the frame 9.

After that, the bobbin spacer 18 is removed. Next, one end of the ribbon spacer 19 is inserted into the gap between the inner periphery of the full voice coil bobbino 7 and the outer periphery of the center pole 3, and the bent end is inserted into the through hole 2° of the full coupling cone 11. The ribbon spacers 19 may be arranged in three pieces, each spaced by about 1200 mm, or
It is appropriate to either make four pieces by shifting them by 90' from each other. Next, the diaphragm 13 and edge outer periphery 15 of the preparatory diaphragm 17 are fixed to the coupling cone flange 12 and frame outer periphery 16 respectively. Thereafter, the ribbon spacer 19 is removed from the through hole 20 of the coupling cone 11.

Of course, it is also possible to assemble only the ribbon spacer 19 from the beginning without using the bobbin spacer 18 at all.

As described above, according to this embodiment, by inserting a plurality of ribbon spacers 19 after removing the bobbin spacer and removing them after installing the prepared insertion plate 17, gap rubbing defects are greatly reduced. can do.

Furthermore, the ribbon spacer 19 can be realized at a very low cost since it is sufficient to simply cut a plastic film of an appropriate thickness into strips.

Effects of the Invention The present invention provides a preparation method consisting of a voice coil bobbin, a center holder, and a coupling cone having a through hole.After inserting a drive unit into a field unit with a frame using a bobbin spacer as necessary, Insert one end of the band-shaped ribbon spacer between the voice coil bobbin, pull out the other end from the through hole of the coupling cone, and join the edged flat plate diaphragm to the 7 collar of the force knob ring cone and the outer periphery of the frame. By pulling out the spacer from the through hole of the coupling cone, it is possible to realize an excellent method for manufacturing a flat speaker, which has the effect of greatly reducing gap rubbing defects.

Furthermore, the ribbon spacer has the advantage of being very inexpensive because it only requires cutting a plastic film or metal sheet of appropriate thickness into strips.

[Brief explanation of drawings]

FIG. 1 is an exploded sectional view showing a conventional method for manufacturing a flat speaker, FIG. 2 is a half sectional view showing a method for manufacturing a flat speaker according to an embodiment of the present invention, and FIG. 3 is a plan view of a ribbon spacer. . 1...Field section, 3...Center ball, 7
...Gay 2 coil bobbin, 9...Frame, 10...Center holder, 11...
Coupling cone, 12...Coupling cone outer rim, 13...Flat plate diaphragm, 1
4...Edge, 15...Edge outer rim, 16...Frame outer rim, 17...
... Preparation method Flat plate diaphragm, 18 ... Bobbin spacer, 19 ... Ribbon spacer. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (4)

[Claims] (1) After inserting the prepared drive unit consisting of the voice coil, center holder, and coupling cone with a through hole into the field unit with frame, one end of a strip-shaped ribbon spacer is placed between the center pole and the voice coil bobbin. and pull out the other end from the through hole of the coupling cone, and after joining the edged flat plate diaphragm to the coupling cone flange and the outer periphery of the frame, pull out the ribbon spacer from the through hole of the coupling cone. A method for manufacturing a flat speaker, characterized in that: (2) After inserting the prepared drive unit consisting of a voice coil, a center holder, and a coupling cone with a through hole into the field unit with frame using a bobbin spacer, a strip is formed between the center pole and the voice coil bobbin. 2. The method of manufacturing a flat speaker according to claim 1, further comprising inserting a ribbon spacer. (3) The method for manufacturing a flat speaker according to claim 1, wherein the ribbon spacer is a plastic film. (4) The method for manufacturing a flat speaker according to claim 1, wherein the ribbon spacer is made of metal.