JPH0984197A - Speaker assembling jig and manufacture of speaker using this jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simultaneously realize the low cost by the reduction of a gap defective and the shortening of a speaker manufacturing process, in a speaker assembling jig to be used for various kinds of acoustic equipments and video equipments and the manufacture of the speaker using this jig. SOLUTION: This jig is made to have a constitution that a speaker assembling jig 31 can be pulled out after a center pole outer periphery part and a voice coil bobbin inner periphery part are supported from a dust cap or the hole provided on a diaphragm through the supporting part of a speaker assembling jig 31 by three or more acicular support parts 31a and the adhesive of the dust cap or the diaphragm is hardened and dried. The reduction of a gap defective and the shortening of a process are contrived and low cost is made possible.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speaker assembly jig used in various audio equipment and video equipment, and a method of manufacturing a speaker using the same.

[0002]

2. Description of the Related Art In recent years, loudspeakers have been required to have a low defective rate and a low cost, but the conventional speaker designing method has already reached its limit.

Therefore, as a coping means from another viewpoint, it is necessary to study the scope of the speaker production method.

Based on this background, a conventional speaker assembly jig and a manufacturing method using the same will be described below. FIG. 5 shows a spacer jig 11 used in the production of a conventional speaker of this type, and its material is generally made of resin or metal.

(Prior Art Example 1) FIGS. 6A to 6C show a manufacturing process of a conventional speaker of this type.
As shown in (a), first, the magnet 1 is sandwiched between the assembly of the frame 6 and the upper plate 2 and the lower plate 3 to form the housing 4. Next, in order to couple the assembly of the voice coil 8 and the damper 9 assembled in a separate process to the magnetic gap 5 of the casing 4 without eccentricity, the spacer jig 11 is used to insert the voice coil 8 into the bobbin. The peripheral portion and the outer peripheral portion of the center pole of the lower plate 3 are adhered while being supported, and then the outer peripheral portion of the diaphragm 7 is adhered to the peripheral portion of the frame 6 as shown in FIG. After the central portion of the bobbin and the bobbin of the voice coil 8 are bonded and all the adhesives are hardened, the spacer jig 11 is pulled out from the magnetic gap 5 and the dust cap 10 is put on the front surface of the vibration plate 7 as shown in FIG. 6C. It was composed by bonding.

(Conventional Example 2) As another conventional example, a conventional example in which a diaphragm and a dust cap are integrated will be described with reference to FIGS. 7A and 7B showing the manufacturing process of the speaker. Explaining only the points different from the prior art described above, the vibration plate 7B and the dust cap 7 as shown in FIG.
Since C is integrated, when the integrated product 7A of the vibration plate 7B and the dust cap 7C is bonded to the bobbin of the voice coil 8, the spacer jig 11 is removed from the magnetic gap 5 as shown in FIG. 7B. It is something that must be removed. Therefore, the diaphragm 7B and the dust cap 7C
When adhering the integrated product 7A to the bobbin of the voice coil 8,
Since there is no spacer jig 11 that serves as a support, it is very unstable and causes a gap defect.

(Conventional Example 3) As still another conventional example, a manufacturing method of a dome tweeter is shown in FIGS. 8 (a) to 8 (c).
First, the magnet 1 is sandwiched between the assembly of the ring 13 and the upper plate 2 and the lower plate 3 to form the housing 4. Next, in the magnetic gap 5 of this housing 4, as shown in FIG.
Voice coil 8 assembled in a separate process as in (a)
And the diaphragm 7 assembly called a diaphragm
In order to prevent eccentricity between the outer peripheral portion of the voice coil 8 and the voice coil 8, as shown in FIG. 8 (b), the brakes are removed after assembly in advance, and the guides of the ring 13 are coupled without eccentricity. As shown in c), the baffle plate 14 is connected to the front surface of the upper plate 2 to configure it. In this case, the difference from the conventional example is that the dome tweeter does not have a damper. Therefore, a spacer jig is used when the voice coil 8 is inserted into the magnetic gap 5 so as not to be eccentric. You cannot do it. Therefore, it is necessary to eliminate the eccentricity of the outer peripheral portions of the voice coil 8 and the diaphragm 7 by previously performing the braking removal after assembling the diaphragm 7 and the voice coil 8.

[0008]

However, in the conventional speaker of this type, the spacer jig 11 must be removed from the magnetic gap 5 and the dust cap 10 must be attached before the dust cap 10 is attached. After the tool 11 was pulled out, a gap defect often occurred because the center of the voice coil 8 in the magnetic gap 5 could not be held.

The voice coil 8 is also used in the manufacturing process.
Since the spacer jig 11 cannot be removed until the adhesive of the diaphragm 7 is hardened, the curing and drying time of the adhesive has a bad influence on the speaker manufacturing process which is trying to shorten the process.

Further, the diaphragm 7B and the dust cap 7C
Also in the conventional example in which is integrated, when the integrated product 7A of the vibration plate 7B and the dust cap 7C is bonded to the bobbin of the voice coil 8, it is very unstable because there is no spacer jig that serves as a support body. Gap defects often occurred due to the inability to hold the gap.

In the case of the dome tweeter, after the diaphragm 7 and the voice coil 8 are assembled, the brakes are removed and the guides of the ring 13 are connected without eccentricity without using a spacer jig. The accuracy of this brake release and the accuracy of eccentricity when connecting the ring 13 and the upper plate 2,
Further, there is a limit to increase the accuracy of eccentricity when the diaphragm 7 is connected to the ring 13, and a gap defect often occurs.

[0012] Further, it is necessary to perform the brake release also in the manufacturing process, which has a bad influence on the shortening of the process.

The present invention solves the above-mentioned conventional problems, and provides an excellent spacer jig and a speaker manufacturing process capable of reducing the cost of the speaker by reducing gap defects and shortening the manufacturing process. It is intended.

[0014]

In order to solve this problem, the speaker assembly jig according to the present invention is provided with a dust cap or a vibration member by means of three or more needle-like supporting portions or two or more plane-like supporting portions. The spacer jig is supported through the hole provided in the plate to support the outer periphery of the center pole and the inner periphery of the voice coil bobbin, and the dust cap or the diaphragm can be removed after the adhesive is cured and dried.

[0015]

With this configuration, the step of removing the speaker assembly jig can be set after the dust cap or the diaphragm is bonded and then the adhesive is cured and dried. That is, the final step can be set, the center holding property of the voice coil can be maintained during the time when the speaker assembling jig is inserted, and the gap defect can be remarkably reduced as compared with the conventional method.

Further, since it is possible to proceed to the next step without waiting for the curing and drying time of the adhesive, it is possible to shorten the step. Further, in the case of a dome tweeter, the braking release process can be omitted.

Therefore, the cost of the speaker can be reduced by shortening the manufacturing process of the speaker.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A speaker assembly jig according to an embodiment of the present invention and a manufacturing method using the same will be described below with reference to the drawings. 1 (a) and 1 (b) show a speaker assembly jig 31 according to an embodiment of the present invention, the material of which is resin or metal.

FIG. 1 (a) shows that four metal pins 31a are used in the gap support portion of a conventional spacer. With these pins 31a, a dust cap or a vibration plate provided with holes in advance is provided with the pins 31a. Use through. Further, with respect to the dust cap or the diaphragm which is not provided with a hole in advance, the pin 31a may be used to make a hole.

FIG. 1B shows a conventional speaker assembly jig 32 in which the area of the gap support portion of the spacer is reduced and a plurality of planar support portions 32a are provided. The method of use is similar to that described above.

Next, a manufacturing process of a speaker using the spacer according to the present invention will be described.

(Embodiment 1) FIGS. 2A and 2B show a manufacturing process of a speaker of this type of the present invention.
As shown in (a), first, the magnet 21 is sandwiched by the assembly of the frame 26 and the upper plate 22 and the lower plate 23 to form the magnetic circuit 24. Next, in the magnetic gap 25 of the magnetic circuit 24, the assembly of the voice coil 28 and the damper 29 assembled in a separate process and the diaphragm 27 are arranged by adhering the outer peripheral portion thereof to the frame 26. An adhesive is applied to connect the central portion of the speaker to the bobbin of the voice coil 28, and then the dust cap 30 that has passed through the speaker assembly jig 31 is adhered to the front surface of the diaphragm 27. At this time, the metal pins 31a of the speaker assembly jig 31 support the inner peripheral portion of the bobbin of the voice coil 28 and the outer peripheral portion of the center pole of the lower plate 23, and dry the adhesive until it hardens. This is Figure 2
This is the state shown in FIG. Then, after all the adhesives have hardened, the speaker assembly jig 31 is pulled out from the magnetic gap 25 and completed.

(Embodiment 2) As another embodiment, an embodiment in which a diaphragm and a dust cap are integrated will be described with reference to FIGS. 3A and 3B showing the manufacturing process of the speaker. Explaining only the points different from the previous embodiment,
Since the vibration plate and the dust cap are integrated as shown in FIG. 3A, the vibration plate and the dust cap are integrated.
Pass the speaker assembly jig 31 through 7A, apply the adhesive to the bobbin of the voice coil 28 as shown in FIG. After the adhesive is hardened, the speaker assembly jig 31 is extracted from the magnetic gap 25 and completed.

(Embodiment 3) As still another embodiment, a method of manufacturing a dome tweeter is shown in FIGS. 4 (a) and 4 (b).
As shown in FIG. 4A, the magnet 21 is sandwiched between the assembly of the ring 33 and the upper plate 22 and the lower plate 23 to form the magnetic circuit 24. Next, in the magnetic gap 25 of the magnetic circuit 24, a voice coil 28 assembled in another process and a diaphragm 27 called a diaphragm are assembled.
The speaker assembly jig 31 is placed on the diaphragm 27 of the assembly of FIG. 4, and the inner peripheral portion of the bobbin of the voice coil 28 and the lower plate 23 are connected by the metal pin 31a of the speaker assembly jig 31 as shown in FIG. 4B. The outer peripheral portion of the center pole is supported, the baffle plate 34 is coupled to the front surface of the upper plate 22, and after all the adhesive is cured, the speaker assembly jig 31 is extracted from the magnetic gap 25 and completed.

In these embodiments, a small hole is opened in the dust cap or the diaphragm, but since the size is very small, there is no particular problem in practical use. If necessary, it can be filled with an adhesive.

[0026]

As described above, according to the present invention, the speaker assembly jig can be removed after the adhesive of the dust cap or the diaphragm is hardened and dried, that is, the step of removing the speaker assembly jig is the final step. Since it can be set, the center holding property of the voice coil can be maintained during the time when the speaker assembling jig is inserted, and the gap defect can be significantly reduced as compared with the conventional method.

Further, since it is possible to proceed to the next step without waiting for the curing and drying time of the adhesive, it is possible to shorten the step. Furthermore, in the case of Dome Tweeter,
The braking release process can be omitted.

Accordingly, it is possible to provide an excellent speaker assembly jig and a method for manufacturing a speaker, which can simultaneously realize reduction of gap defects and cost reduction of the speaker by shortening the speaker manufacturing process. The industrial value is enormous.

[Brief description of drawings]

FIG. 1 is an external view of an embodiment of a speaker assembly jig of the present invention.

FIG. 2 is a sectional view showing a manufacturing process of the speaker according to the first embodiment.

FIG. 3 is a sectional view showing a manufacturing process of the speaker according to the second embodiment.

FIG. 4 is a sectional view showing a manufacturing process of the speaker according to the third embodiment.

FIG. 5 is an external view showing a conventional spacer jig.

FIG. 6 is a sectional view showing a manufacturing process of a speaker according to a first conventional example.

FIG. 7 is a sectional view showing a manufacturing process of a speaker according to a second conventional example.

FIG. 8 is a sectional view showing a manufacturing process of a speaker according to a third conventional example.

[Explanation of symbols]

 24 Magnetic Circuit 25 Magnetic Gap 28 Voice Coil 29 Damper 30 Dust Cap 31, 32 Speaker Assembly Jig 31a, 32a Pin

Claims (2)

[Claims] 1. A speaker assembling jig having three or more needle-shaped support portions or two or more planar support portions and supporting a gap portion between a center pole outer peripheral portion and a voice coil bobbin inner peripheral portion. 2. A speaker manufacturing method for manufacturing a speaker using the speaker assembly jig according to claim 1.