JPH0145197Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention is particularly applicable to a bass speaker, and relates to a speaker in which a diaphragm is bonded to a frame so as to prevent imbalance in edge amplitude.

Conventionally, it is necessary for bass speakers to have a low minimum resonance frequency. For this reason, as shown in FIG. 1, when attaching, for example, a large-diameter cone-shaped diaphragm 1 to the frame 2, an edge material 3'A is used. ,
If the adhesive protrudes from the inside of the fixed gasket material 3'B, the amplitude of the edge material 3'A becomes unbalanced, making the characteristics of the speaker unstable and causing problems in appearance. It was hot.

The present invention was developed in view of the above points, and its purpose is to prevent the adhesive from extruding from the bonded part of the edge material as a vibration system as designed, and to prevent the adhesive from extruding from the adhesive part of the edge material as a vibration system. The object of the present invention is to provide a speaker that eliminates variations in amplitude, stabilizes performance, and improves appearance.

The present invention will be explained below according to an embodiment shown in FIG.

Reference numeral 1 denotes a cone-shaped diaphragm, for example, and 2 a frame to which the diaphragm 1 is attached.
An outer peripheral edge portion 2B for adhering and accommodating B is provided perpendicularly to the outer periphery of the falling wall 2A. 3 is a roll-shaped edge material 3A made of an elastic material such as rubber or urethane, which is curved upward, and the thick gasket material 3B, which is oriented obliquely downward with respect to the falling wall 2A. This is a connecting member integrally formed via a rising piece 3C formed on the outer periphery. The gasket material 3B is bonded to the frame 2 using an adhesive 4, and the edge material 3B is bonded to the frame 2 using an adhesive 4.
The inner periphery of A is adhered to the outer periphery of the diaphragm 1.

Reference numeral 5 denotes a space having a substantially wedge-shaped cross section formed between the falling wall 2A and the rising piece 3C, and this space 5 is for adhering the gasket material 3B to the outer peripheral edge of the frame. be.

6 is a positioning projection provided on the lower surface of the gasket material 3B, and this positioning projection 6 is a recess _2B provided on the outer periphery and upper surface of the frame 2.
By being fitted therein, the connecting member 3 of the frame 2 is positioned when the connecting member 3 of the frame 2 is attached. The gasket material 3B is attached to the falling wall 2A of the frame 2.
It is formed so that it is located slightly inside.

Then, using this connecting member 3, the frame 2
To bond the diaphragm 1 to the diaphragm 1, the outer peripheral edge of the diaphragm 1 is bonded to the edge material 3A of the connecting member 3, and then the gasket material 3B of the connecting member 3 is bonded and attached using an adhesive. In this case, the adhesive 4 for bonding the gasket material 3B to the frame 2 causes the outer periphery of the rising piece 3C formed on the outer periphery of the edge material 3A to come into contact with the gasket material 3B. 3C and the falling wall 2A of the frame 2, the space 5 has a generally wedge-shaped cross section.
Accumulates inside. Therefore, the adhesive 4 does not protrude to the outside of the space 5 and especially to the front surface of the diaphragm 1, and the unbalance of the amplitude due to the adhesive 4 adhering to the edge material 3A is eliminated, and the amplitude of the diaphragm 1 is reduced. The surface is uniform around the circumference and there is no visible stain.

Further, FIG. 3 shows another embodiment of the present invention. This embodiment has the same structure as the first embodiment except that the edge material 3A has a corrugation shape. Similarly to the first embodiment, a space is formed between the rising piece 3C provided diagonally between the gasket material 3B and the edge material 3A and the inner wall of the falling wall 2A of the frame 2. 5
Adhesive no longer protrudes from the inside to the outside.
There is no imbalance in the amplitude caused by the adhesive 4 adhering to the edge material 3A, and the amplitude of the diaphragm 1 becomes uniform over the circumference, with no visible stains.

In the above embodiment, the edge material 3A and the gasket material 3B are integrated, so that bonding is easy and the number of assembly steps can be reduced. They may also be glued together.

As described above, the present invention connects the edge material and the gasket material to the outer periphery of the edge material, which is located inside the bonded part with the frame, through the rising piece part that faces diagonally to the falling wall of the frame. Since the rising piece forms a space for an adhesive reservoir with a generally wedge-shaped cross section between the rising piece and the falling wall of the frame, the adhesive for adhering the gasket material to the frame can be applied to the space. Since it does not protrude from the outside, especially the front side of the edge material, and stick to the edge material, there is no imbalance caused by the amplitude of the diaphragm, and the performance as a speaker is stabilized and the appearance is not unsightly. .

[Brief explanation of drawings]

Figure 1 is a sectional view showing an example of a conventional speaker.
FIG. 2 is a cross-sectional view showing one embodiment of the speaker according to the present invention, and FIG. 3 is a cross-sectional view showing another embodiment of the speaker according to the present invention. 1... Vibration plate, 2... Frame, 2A... Falling wall, 3... Connecting member, 3A... Edge material, 3B
...Gasket material, 3C... Falling piece, 4...
Adhesive, 5...Space part.

Claims (1)

[Scope of utility model registration request] A speaker has a structure in which a cone-shaped diaphragm is bonded using an edge material and a gasket material placed on the outer periphery of the edge material, and the frame is attached to the outer periphery of the edge material placed inside the adhesive part of the frame. The edge material and the gasket material are connected through a rising piece diagonally opposed to the falling wall, and an adhesive reservoir having a generally wedge-shaped cross section is provided between the rising piece and the falling wall. A speaker characterized by forming a space.