JPS62115999A - Manufacture of speaker - Google Patents

Abstract

PURPOSE:To prevent a bonding agent from blowing out by applying the bonding agent to a bonding agent applying groove and inserting a weight ring until a flange contacts an upper end of a voice coil bobbin from the upper part of the voice coil bobbin by making a chamber part a guide. CONSTITUTION:The weight ring 13, after the bonding agent 16 is applied to the bonding agent applying groove 18 is integrated into the voice coil bobbin 9a from the upper part of the voice coil 9 making the chamber part 15 the guide until the flange abuts against the upper end of the voice coil bobbin 9a. During this integration, the bonding agent 16 is prevented from flowing out downward from a bonding agent checking part 17 of a large diameter, fed upward, uniformly applied between the inner circumferential surface of the voice coil bobbin 9a and the outer circumferential surface of the weight ring and a complete bonding connection is performed. Thereby, the bonding agent is prevented from flowing out below the weight ring and flowing downward and a considerably excellent quality can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method of manufacturing a speaker capable of stably reproducing low frequencies using a weight ring.

BACKGROUND OF THE INVENTION Generally speaking, this type of speaker has been constructed as shown in FIG.

That is, a plate 2 having a center ball 1, a ring-shaped magnet 3, and a ring-shaped upper plate 4.
The frame 6 is coupled to a magnetic circuit 6 configured by
A gasket 7 and a diaphragm 8 are connected to the periphery of the frame 6, and a voice coil 9 is attached to the center of the diaphragm 8.
and the middle part of this voice coil 9 is connected to a damper 10.
The lower part of the voice coil 9 is held in the magnetic gap 11 of the magnetic circuit 5 without eccentricity, and a cylindrical weight ring 13 having a flange 12 at the upper end is fitted into the upper part of the voice coil 9 to bond the voice coil 9 with adhesive. In addition, a dust cap 14 was attached to the upper center surface of the diaphragm 8.

In such speakers, the conventional weight ring 1
As shown in FIGS. 2 and 3, metal 1 has a cylindrical shape with a flange 12 projecting outward at the upper end made of synthetic resin, rubber, etc., and a chamfered portion 16 is provided on the outer periphery of the lower end. As shown in FIG. 4, this weight ring 13 is assembled by applying adhesive 16 to the upper part of the chamfered part 15, and installing it from the upper end of the bobbin 9& of the voice coil 9 using the chamfered part 16 as a guide. 13 and the inner surface of the bobbin 92L were bonded by adhering an adhesive 1θ.

Problems to be Solved by the Invention However, the adhesive 16 acts as a lubricant during assembly, but in the weight ring 13 having the above structure, the adhesive 16 escapes to the chamfered portion 16 side as shown in FIG. After being incorporated into the bobbin 9a, it flows along the bottom of the bobbin 9&, reaching the magnetic gap 11 of the magnetic circuit 6, and the voice coil 9 is coupled to the magnetic circuit 6, making it inoperable even if input is applied. This poses a serious problem in that the bobbin 9a and the weight ring 13 are not properly connected to each other.

The present invention eliminates the above-mentioned conventional drawbacks.
To provide a method for manufacturing a speaker that can sufficiently adhesively bond a weight ring and a voice coil bobbin, and that does not cause the phenomenon that the adhesive flows downward and connects the voice coil and the magnetic circuit. .

Means for Solving the Problems In order to achieve the above object, the present invention provides a weight ring with an adhesive blocking portion of a slightly larger diameter on the chamfered portion of the outer periphery of the lower end, and the adhesive blocking portion is disposed on the adhesive blocking portion. A coating groove is provided, and after adhesive is applied to the adhesive coating groove, a weight ring is inserted from the tip of the voice coil using the chamfered portion as a guide.

Function: In this way, after providing the adhesive blocking portion and the adhesive application groove on the wayliton, and applying the adhesive to the adhesive application groove,
Since the weight ring is inserted into the voice coil bobbin, the adhesive does not flow downward during assembly and is evenly applied between the surfaces of the voice coil bobbin and weight ring.

Embodiments Hereinafter, embodiments of the present invention will be explained with reference to FIGS. 6 to 10 of the drawings.

The overall structure of the speaker is substantially the same as that shown in FIG. 1, and the weight ring used in the present invention will be mainly explained here.

As shown in FIGS. 6 to 8, the weight ring 13 is formed into a cylindrical shape made of metal 9, synthetic resin, rubber, etc., and has a cylindrical shape on the outer periphery of the upper end that controls the installation when the weight ring 13 is installed in the voice coil 9. A collar 12 is formed, and a chamfered portion 16 is provided at the lower end of the outer periphery to serve as a guide when starting to assemble the voice coil bobbin 9a.
Q1 to Q, 51 from the outer diameter of the weight ring 13 on the top of the
An adhesive blocking portion 17 having a diameter of 18 and having a diameter equal to the inner diameter of the voice coil bobbin 92L is provided, and an adhesive coating groove 18 is provided above the adhesive blocking portion 1γ.

In the weight ring 13 having such a structure, as shown in FIG. 9, after applying the adhesive 16 to the adhesive application groove 18, the adhesive 16 is applied to the voice coil bobbin 91L from above the voice coil 9 using the chamfered 9 portion 15 as a guide. Assemble the voice coil bobbin 9a until the collar 12 comes into contact with the upper end of the voice coil bobbin 9a. During this assembly, the adhesive 16 is prevented from flowing downward by the large-diameter adhesive blocking portion 17, and is sent upward, uniformly between the inner circumferential surface of the voice coil bobbin 9B and the outer circumferential surface of the weight ring 13. A complete adhesive bond is achieved as shown in FIG.

Effects of the Invention Since the speaker manufacturing method of the present invention is configured as described above, the adhesive bond between the voice coil bobbin and the weight ring is ensured and stable because the adhesive is applied uniformly during assembly, and furthermore, It also prevents the adhesive from leaking to the bottom of the weight ring and flowing downward, and the voice coil and the magnetic gear knob of the magnetic circuit are bonded with adhesive, preventing them from operating even when input is applied, and is extremely superior in terms of quality. It has great practical value.

[Brief explanation of drawings]

Figure 1 is a half-sectional view of a typical speaker, Figure 2 is a top view of a weight ring used in a conventional speaker, Figure 3 is a front view of the same half-section, and Figure 4 is the voice coil of the same weight ring. FIG. 6 is a cross-sectional view of the main parts after assembly, FIG. 8 is a top view showing the weight ring used in the method of manufacturing the speaker of the present invention, and FIG. 7 is a cross-sectional view of the same half. 8 is an enlarged sectional view of the same main part, FIG. 9 is a sectional view of the main part showing one step of the present invention, and FIG. 10 is a sectional view of the main part showing the incorporation of the weight ring into the voice coil. FIG. 3 is a sectional view of the main part after assembly. 6... Magnetic circuit, 6... Frame, 8
...Diaphragm, 9...Voice coil, 9
2L...Voice coil ゛Bobbin, 1o...
...Damper, 11. Mountain... Magnetic gap, 12.
... Tsuba, 13 ... Weight ring, 14
...Dust cap, 15...9 chamfered parts, 16...adhesive, 17...adhesive blocking part, 18...adhesion Agent application groove. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 9 Figure 10

Claims (1)

[Claims] When fitting the weight ring to the upper part of the voice coil bobbin that fits into the magnetic gap of the magnetic circuit, the weight ring is provided with a flange at the upper part and a chamfered part at the lower part, and other parts are attached to the upper part of this chamfered part. An adhesive blocking part having a larger diameter is provided, and an adhesive application groove is provided above the adhesive blocking part, and after applying adhesive to the adhesive application groove, the chamfered part is used as a guide. A method of manufacturing a speaker, comprising inserting the weight ring from above the voice coil bobbin until the collar contacts the upper end of the voice coil bobbin.