JPH051195Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an edge supporting a vibration system and a lead-out structure for a voice coil lead wire in a speaker having a dome-shaped diaphragm.

[Prior Art] Typical structures of the edge portion of a conventional speaker having a dome-shaped diaphragm are shown in FIGS.
As shown in FIG. 5c, a triangular pyramid-shaped corrugation 22 is formed tangentially on the outer periphery of the diaphragm 21.
Commonly known as tangent edge 2, in which a large number of a are arranged.
2 is integrally formed with the diaphragm 21 by a synthetic resin film, and the lead wire 23a of the voice coil 23 is bonded to the outer periphery of the back surface of the diaphragm 21. (Fig. 5a) or tangentially from two points in the diametrical direction (Fig. 5 a).
(b) in Figure 5), or a structure in which it is pulled out in one direction (Figure 5c) for convenient connection with speaker terminals was common.

[Problem to be solved] In conventional dome-shaped speakers with such a structure, the lead wire lead-out part has different edge compliance due to the lead wire and adhesive, so the vibration system is centered around the lead-out part. In particular, in the structure shown in Figure 5c, the compliance of the edges is biased in the circumferential direction, so the above-mentioned rolling vibration occurs significantly, and as a result, the frequency characteristics of the speaker deteriorates, and the voice coil There was a problem that the magnetic circuit came into contact with the magnetic circuit and generated noise.

Therefore, an object of the present invention is to solve the above problems of the conventional example by improving the edge shape and the lead-out structure of the voice coil lead wire.

[Means for Solving the Problems] The dome-shaped speaker according to the present invention for achieving the above-mentioned object will be explained using FIGS. 1 to 4 showing embodiments. Board 1
An edge 2 supporting the diaphragm 1 on the outer periphery of the diaphragm 1
A total of three corrugations A2a having a groove-like cross section are formed along the tangent to the diaphragm 1 at positions 120° apart from each other along with the normal corrugations B2b, and the lead wire 3a of the voice coil 3 is connected to the corrugations A3a. It is characterized by having a vibration system which is guided along the inside of one of the corrugations in a state of being glued, and the inside of the remaining two corrugations A is simply coated with adhesive. This is a dome-shaped speaker.

[Function] In a dome-shaped speaker configured like this, the compliance of the corrugation A mainly depends on the adhesive applied to the inside, and the corrugation A is evenly distributed at three locations in the circumferential direction of the edge. This eliminates the imbalance in compliance in the circumferential direction of the edge or the portion that acts as the axis of rolling, which was the case in the past, so abnormalities in speaker operation due to the rolling phenomenon of the diaphragm are significantly improved.

[Embodiment] The structure of the vibration system of the first embodiment will be described in detail with reference to FIG. The edge 2 is integrally molded with the same material.

In the edge 2, a total of three corrugations A2a having a groove-like cross section are formed along the tangent to the diaphragm 1 at positions 120° apart from each other in the circumferential direction. A triangular pyramidal corrugation B2b having a similar shape is formed in the tangential direction of the diaphragm 1.

A voice coil 3 is bonded to the outer periphery of the rear surface of the diaphragm 1, and a lead wire 3a of the voice coil 3 is bonded to the inside of one corrugation A2a with an adhesive 4, and the lead wire 3a of the voice coil 3 is bonded to the edge 2 via the corrugation A2a.
is derived to the outside of.

Adhesive 4 is applied to the inside of the remaining two corrugations A2a.

The vibration system is incorporated into a frame fixed to a magnetic circuit in the same way as a normal dome-shaped speaker, forming a dome-shaped speaker (not shown).

FIG. 2 shows the vibration system of the second embodiment of the present invention, in which the corrugation A2 accommodates the lead wire 3a.
The shape of a is hook-shaped, and is circumscribed to the outer periphery of the diaphragm 1 and inscribed to the outer periphery of the edge 2.

In this embodiment, the circumscribed portion and the inscribed portion are in opposite directions.

In the third embodiment shown in FIG. 3, the corrugation A has a substantially S-shape so that the circumscribed part and the inscribed part are in the same direction.

In the fourth embodiment shown in FIG. 4, the shape of the corrugation A is arcuate with opposite directions at both contact points.

In the second to fourth embodiments described above, the lead wire 3a is bent at two places, that is, at the boundary between the diaphragm 1 and the edge 2, and at the boundary between the edge 2 and the edge attachment part 5. Since the lead wire is drawn out to the outside of the edge as a tangent to the arc forming each boundary, the stress applied to the lead wire at the bent edge portion is alleviated.
This has the effect of reducing disconnection accidents.

Although typical embodiments have been described above, the embodiments of the present invention are not limited to the above. For example, the shape of the corrugation B that mainly contributes to edge compliance may be a concentric corrugation type in addition to the tangential type. The configuration of the vibration system may be a free edge type in which the diaphragm 1 and the edges 2 are made of different materials, etc.
As long as the shape of the edge and the lead-out structure of the lead wire satisfy the requirements stated in the claims of the present invention, the present invention can be modified and implemented as appropriate.

[Effects] The dome-shaped speaker according to the present invention has the following effects.

A total of three corrugations A are distributed evenly at three locations in the circumferential direction of the edge, one for leading out the lead wire and two corrugations that act as dummies that are coated with adhesive and formed to have the same compliance. Since the conventional part that acts as a rolling axis and the part that causes an imbalance in compliance in the circumferential direction of the edge is eliminated, abnormal speaker operation caused by the rolling phenomenon of the diaphragm is significantly improved.

Furthermore, when gluing the lead wire to the edge part, the groove part of corrugation A can be used as a guide for adhesive application and lead wire placement, making the lead wire processing work in the assembly process easy, quick, and highly accurate. It has the following characteristics.

Due to the above advantages, a speaker with stable operation, quality, and excellent performance can be obtained.

[Brief explanation of drawings]

FIG. 1 is a rear view of the vibration system of the first embodiment of the present invention.
Fig. 2 is a rear view of the vibration system of the second embodiment, Fig. 3 is a rear view of the main parts of the vibration system of the third embodiment, Fig. 4 is a rear view of the main parts of the vibration system of the fourth embodiment, and Fig. 5 is a rear view of the main parts of the vibration system of the fourth embodiment. Figures a, b, and c are explanatory views of the lead wire processing structure of a conventional vibration system, respectively. 1 is a diaphragm, 2 is an edge, 2a is a corrugation A, 3 is a voice coil, and 3a is a lead wire.

Claims (1)

[Claims for Utility Model Registration] 1. On the edge 2 which is on the outer periphery of the dome-shaped diaphragm 1 and supports the diaphragm 1, along with a normal corrugation B2b, there is a tangential line of the diaphragm 1 at a position 120 degrees apart from each other. A total of three groove-shaped corrugations A2a are formed along the line, and the lead wire 3a of the voice coil 3 is guided along the inside of one corrugation A of the corrugations A3a, and the remaining two A dome-shaped speaker characterized by having a vibration system having a structure in which only adhesive is applied on the inside of the corrugation A. 2. The speaker according to claim 1, wherein the corrugation A2a is shaped along a curve that circumscribes the outer periphery of the diaphragm 1 and inscribes the outer periphery of the edge 2.