JP3674213B2 - Manufacturing method of speaker cone and speaker using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a speaker cone for a speaker used in various audio devices, and a speaker using the same.
[0002]
[Prior art]
A conventional speaker and speaker cone will be described with reference to FIGS. 3, 4A and 4B.
[0003]
3 is a cross-sectional view of the speaker, FIG. 4 (a) is a cross-sectional view of the speaker cone, which is the main part, and FIG. 4 (b) is an enlarged cross-section of the diaphragm and the edge constituting the speaker cone. FIG.
[0004]
The configuration of the speaker will be described with reference to FIG. 1. Reference numeral 1 denotes a magnetic circuit, which is formed of a bottom plate 1a, a magnet 1b, and a top plate 1c. 2 is a frame coupled to the magnetic circuit 1, 4 is a voice coil fitted into the magnetic gap 3 of the magnetic circuit 1, and 5 is a speaker cone comprising a diaphragm 5b and an edge 5a.
[0005]
Next, the speaker cone will be described in detail. The diaphragm 5b is made of polypropylene, and the cloth edge 5a is adhered to the diaphragm 5b by applying a primer 6 as an auxiliary adhesive to the rubber system. The adhesive 7 was applied, the cloth edge 5a was bonded, and the reinforcing cone 8 was applied to the ends of the diaphragm 5b and the edge 5a to form the speaker cone 5.
[0006]
[Problems to be solved by the invention]
However, when the polypropylene (PP) resin, polyethylene (PE) resin, or liquid crystal polymer (LCP) described in the above prior art is used for the diaphragm 5b, it is necessary to use the auxiliary adhesive 8, which is a bottleneck in reducing production man-hours. In addition, the drying time is long, and there are problems such as occurrence of poor appearance due to misalignment.
[0007]
The present invention provides a speaker cone manufacturing method that solves the above-described problems and contributes to a reduction in production man-hours and a reduction in drying time, and a speaker using the same.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the speaker cone manufacturing method of the present invention is a moisture curing reaction type in which a resin is molded into a desired shape and then fluidized by heating the periphery of a diaphragm formed by plasma irradiation. the hot-melt coating, which forms a cone speaker paste edges made of urethane foam, with increasing to adhesion by plasma irradiation of the diaphragm, the moisture-curing reaction to the end surface of the diaphragm and the edge type hot melt is cured in the manner protrudes perform end surface reinforcement, in which and enables a pole Umate efficient bonding work has abolished the use of the curing auxiliary adhesive.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
According to the first aspect of the present invention, after the resin is molded into a desired shape, a moisture curing reaction type hot melt that is heated and fluidized is applied to the periphery of the diaphragm formed by plasma irradiation, is intended to form a cone speaker paste edges made of urethane foam, strive to reducing man-hours of bonding work as unnecessary the use of an auxiliary adhesive increases adhesion by plasma irradiation of the diaphragm, and the diaphragm It is possible to perform an extremely efficient bonding operation in which the moisture curing reaction type hot melt protrudes from the end surface of the edge and is cured to reinforce the end surface .
[0010]
According to a second aspect of the present invention, there is provided at least a magnetic circuit, a frame coupled to the magnetic circuit, a voice coil fitted in a magnetic gap provided in the magnetic circuit, and an inner periphery coupled to the voice coil. A speaker comprising: a speaker cone formed by the speaker cone manufacturing method according to claim 1, wherein the outer periphery is coupled to the frame, and has improved input resistance and improved low-frequency reproduction capability. A speaker can be provided.
[0011]
An embodiment of the speaker of the present invention will be described below with reference to FIGS.
In the description, since the configuration of the speaker is the same as that of the prior art, the description is omitted, and the speaker cone, which is a main part, will be described.
[0012]
FIG. 1A is a side sectional view of the speaker cone of the present invention, FIG. 1B is an enlarged side sectional view of the essential parts of the diaphragm and the edge, and FIG. It is a frequency characteristic figure of the speaker using a cone.
[0013]
According to the figure, 11 is a diaphragm made of polypropylene and formed by performing low temperature plasma treatment after molding. Reference numeral 12 denotes an edge made of urethane foam. A moisture curing reaction type hot melt 13 that is heated and fluidized is applied between the diaphragm 11 and the edge 12 and cured to bond the diaphragm 11 and the edge 12 together. ing.
[0014]
The moisture-curing reaction type hot melt 13 does not contain a solvent and is high in clay even when fluidized by heating. Therefore, as shown in FIGS. After adhering so that it protrudes and hardening | curing, the end surface reinforcement of the diaphragm 11 and the edge 12 can also be performed.
[0015]
Accordingly, it is possible to reduce the number of man-hours for the adhering work by eliminating the need for an auxiliary adhesive and a reinforcing adhesive, which are conventionally required, and to perform an extremely efficient adhering work by the hot melt 13.
[0016]
FIG. 2 shows frequency characteristics of a speaker using the above-described speaker cone (the configuration is the same except for the conventional speaker and the speaker cone, and the description thereof is omitted) and the speaker using the conventional speaker cone. In particular, it was confirmed that the low-frequency reproduction ability was improved.
[0017]
Further, it was confirmed that the resistance against input was improved by using urethane foam for the edge 12 as compared with the conventional one.
[0018]
【The invention's effect】
As described above, the present invention is made of urethane foam by applying a moisture-curing reactive hot melt fluidized by heating to the periphery of a diaphragm formed by plasma irradiation after resin molding into a desired shape. An edge is attached to form a speaker cone, and an extremely efficient bonding operation can be performed by plasma irradiation onto the diaphragm and bonding of the edge and diaphragm by hot melt.
[Brief description of the drawings]
1A is a side sectional view of a speaker cone of the present invention, and FIG. 1B is an enlarged side sectional view of a main part of a diaphragm and an edge as the main part. FIG. 2 is a speaker using the speaker cone. Fig. 3 is a side cross-sectional view of a conventional speaker. Fig. 4 (a) is a cross-sectional view of a speaker cone, which is the main part of the speaker. Fig. 3 (b) is a diagram of a diaphragm and an edge constituting the speaker cone. Enlarged cross section [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Magnetic circuit 2 Frame 3 Magnetic gap 4 Voice coil 11 Diaphragm 12 Edge 13 Hot melt

Claims (2)

After resin molding into a desired shape, a moisture-curing reaction type hot melt that is heated and fluidized is applied to the periphery of the diaphragm formed by plasma irradiation, and an edge made of urethane foam is pasted to the hot melt. A speaker cone manufacturing method, wherein the speaker cone is hardened so as to protrude to the end face of the diaphragm and the edge .   A magnetic circuit, a frame coupled to the magnetic circuit, a voice coil fitted in a magnetic gap provided in the magnetic circuit, and an inner circumference coupled to the voice coil and an outer circumference coupled to the frame. A speaker comprising the speaker cone formed by the method for manufacturing a speaker cone according to 1.

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