JPS6014560B2 - Manufacturing method of vibration system in speaker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a vibration system comprising a speaker diaphragm and a diaphragm peripheral support such as an edge and a damper.

Conventionally, in a speaker, the diaphragm periphery consists of a diaphragm for sound generation, a voice coil bobbin that drives the diaphragm in accordance with the audio signal current, a damper that correctly holds this bobbin in a magnetic field, and an edge in a cone speaker. The supports are separately molded and dried, and post-processing is performed to change the Young's modulus and loss of the diaphragm, and then each element is bonded with adhesive to obtain the vibration system of the speaker.

In this case, it is important to bond the diaphragm and voice coil bobbin evenly without disturbing their shapes and dimensions in order to eliminate variations in speaker characteristics (especially non-uniform conformance, which is a problem at high frequencies). . Therefore, the present invention aims to provide a method for manufacturing a vibration system for a speaker, which can easily perform uniform adhesion and also perform post-processing such as curing of the diaphragm, etc., and drying at the same time. Each of the two vibration system parts is housed independently in a pair of molds, and the vibration system parts are placed under heating and pressurized conditions in the molds, and the thermosetting resin applied to the first vibration system part is heated and pressurized. This allows it to be integrated with other vibration system parts.

FIG. 1 is a sectional view showing an embodiment of the method for manufacturing a vibration system for a speaker according to the present invention, in which the method is applied to a dome-shaped speaker.

In the figure, a dome-shaped diaphragm 1 made of aromatic polyamide resin fiber (trade name: Conex) cloth and a voice coil bobbin 2 following it are integrally molded into a mold 3.
It is installed at A. On the other hand, the mold 38 is provided with an edge 4 formed in an edge shape using the same base material as the diaphragm 1. Next, powder of thermosetting resin 5 is sprinkled on the bonded portion between the edge 4 and the diaphragm 1 and the corrugated portion of the edge 4. Next, press the molds 3A and 3B at high pressure (for example, 20
~25 kg/). As a result, the thermosetting resin 5 is melted by the heating temperature of the molds 3A and 3B,
It penetrates into each part of the edge 4, bobbin 2, and diaphragm 1 centering around the sprayed position, undergoes a polymerization reaction, and is cured, as well as adhering the diaphragm 1 and the edge 4 together. Here, mold 3
A, 38 corresponds to the shape of each element, but an appropriate clearance is provided in the part where the thermosetting resin 5 is penetrated depending on the amount of penetration and the thickness of the resin 5 formed on the surface of each element. .

That is, the amount of penetration and the thickness of the outer skin are appropriately set according to the degree of clearance, and the strength of adhesion, the hardness of the part of each element penetrated by the resin 5, and the internal loss are set to desired values. The vibration system formed by the method described above is in a state where the texture of the base material is impregnated with the thermosetting resin and the edges 4
The bobbin 2 is then bonded with the thermosetting resin.

Fig. 2 shows a partially enlarged view of the same, in which the hatched part in a means the base fabric whose shape is fixed by the impregnated and hardened thermosetting resin, and the hatched part in b is the outer layer of the base fabric. It means an adhesive film that becomes In addition, the dome part I in Fig. 2
In A, the hardness and internal loss can be appropriately controlled depending on the use and purpose of the speaker. This is mold 3A
, 3B can be applied at the same time during the compression process, and can also be applied after adhesion. In addition, in the above-mentioned example, the case where the base material was made of aromatic polyamide resin fiber cloth was shown, but it may be made of cotton cloth, which is commonly used as a base material.

Further, in the above embodiment, the case where the present invention is applied to a dome-shaped speaker is shown, but the same manufacturing method can also be used to bond and harden vibration system parts such as a cone-shaped speaker.

In addition, in the example, a case was shown in which thermosetting resin powder was sprinkled to heat the eaves, but this is not limited to powder.
The vibrating system parts may be coated or impregnated with a liquid in advance, or the vibrating system parts may be coated or impregnated with the liquid before being placed in the mold.

As is clear from the above description, according to the method for manufacturing a vibration system in a speaker of the present invention, when molding a vibration system such as a diaphragm and a bobbin, a diaphragm and an edge, etc. Thermosetting resin is applied near the vibration system parts, and a mold is used to transfer the thermosetting resin to other vibration system parts under heat and pressure conditions to bond and integrate them. The degree and range of penetration of the thermosetting resin can be appropriately set and made uniform, the conformance of the vibration system parts can be freely controlled, and the operating characteristics can be selected.

In particular, the problem of non-uniform conformance due to non-uniform adhesive parts has been eliminated, and the high frequency characteristics have been improved.In addition, each vibration system component can be dried in the same process, which previously took a long time. can be removed, simplifying the manufacturing process.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of a method for manufacturing a vibration system in a speaker according to the present invention, and FIG. 2 is a partially enlarged view thereof. 1...Diaphragm, IA...Dome part,
2...Voice coil bobbin, 3A, 38...
... Mold, 4 ... Edge, 5 ... Thermosetting resin, 6 ... Vibration plate, 7""" Bobbin. )

Claims (1)

[Claims] 1 A pair of molds capable of housing vibration system components are used, and one vibration system component accommodated in one mold is coated with thermosetting resin at a position close to the other vibration system components, A clearance is formed in the pair of molds according to the amount of thermosetting resin that permeates the vibrating system component or forms on the surface, and the vibration of the pair is determined by the amount of thermosetting resin that permeates the vibrating system component or forms on the surface. The thermosetting resin applied to the vibration system parts is infiltrated or forms a surface layer in and around the joining area of the vibration system parts and the other vibration system parts, thereby joining both vibration system parts. A method of manufacturing a vibration system in a speaker, characterized in that: