JPH0134472Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement in the assembly structure of so-called headphone speakers such as head-hung type and ear-hung type.

(Prior Art) Conventional small speakers of this type have been assembled by, for example, inserting a pre-assembled speaker mechanism into an exterior case, or dropping individual speaker components one after another. However, in any of these configurations, the mechanism part is fixed to the case by gluing it to the inner wall of the case, or by heating and deforming the rear end of the opening of the case. In this way, integration measures have been taken, such as preventing the last assembled component from slipping out of the opening end of the case.

(Problems to be Solved by the Invention) However, according to the above means, the work of assembling the component parts of the speaker is extremely complicated and inefficient. Moreover, products assembled by this conventional method cannot be disassembled without damaging the parts, so when a defective product is discovered as a result of a performance test of the finished product at the factory, it is difficult to disassemble it without damaging the parts. It was not possible to recycle the finished product by replacing it with a good one or some of its parts, so it was disposed of as a scrap product, resulting in a large loss.

(Means for Solving the Problems) Therefore, an object of the present invention is to provide an assembly structure for a headphone speaker that can solve the above problems by extremely simple means.

Therefore, in order to achieve the above object, the gist of the present invention is to form several hooks on the rear edge of the annular wall of the speaker case made of a synthetic resin molded body, and to draw out the lead portion of the voice coil. The speaker components are successively introduced and assembled into the annular wall, and the ear pieces of the terminal board with projecting ear pieces are press-fitted and locked into the locking claw positions, and the speaker components are assembled. The present invention resides in that it is configured to be fixed in the annular wall.

Further, the present invention will be described below based on embodiments shown in the drawings.

(Example) As shown in FIG. 1, the speaker of the present invention includes a case 1, a diaphragm 2, a plate 3, a magnet 4,
It consists of a yoke 5, a resistor 6, and a terminal plate 7.

Case 1 is made of a synthetic resin molded body,
An assembly step 12 is formed on the inner peripheral surface of the front protector 11, and an annular wall 13 surrounding the step 12 is formed.
A groove 14 is formed by cutting off a part of the wall thickness.
A check-shaped locking pawl 15 (see FIGS. 3 and 4) is provided on the holder, and a cut groove 16 is provided for passing a lead portion of a voice coil, which will be described later.

A voice coil 17 is attached to the center of the diaphragm 2, and the middle of the lead portion 17 is fixed to a surrounding ring and pulled out.

The plate 3 is provided with an escape groove 19 for the lead portion 18 by cutting out a part of its outer periphery, and when the yoke 5 is assembled with the magnet 4 interposed, a predetermined gap is formed between the plate 3 and the center magnetic pole 21. The yoke 5 is provided with a rear ventilation hole 22 around the central magnetic pole 21.

The register 6 is effectively made of an elastic sheet made of urethane foam or the like in addition to ordinary dust-proof paper, and a part thereof has a through hole 23 aligned with the ventilation hole 22.
is provided.

Further, the terminal plate 7 has an electrode plate 24 printed on its front side, and protruding ears 25 are provided at several locations on the outer periphery of the terminal plate 7 at positions that coincide with the engaging claws 15.

According to the speaker of the present invention, the speaker components are directly assembled to the case 1. That is,
First, the diaphragm 2 is dropped into the annular wall 13 of the case 1 and placed on the stepped portion 2. At this time, the lead portion 1
8 along the cut groove 16. Next, plate 3
Align the escape groove 19 with the cut groove 16 and drop it in, and then drop the magnet 4, yoke 5 and register 6 in this order.

At the end of this assembly, the terminal plate 7 is inserted, and when the protruding lug 25 of the plate 8 is aligned with the position of the locking claw 15 of the annular wall 13 and pressed, the lug 25 is inserted into the thin groove 15. Due to the relief of the claw 15 due to the elasticity of the material,
As shown in FIG. 4, the pawl 15 returns to its original position after once overcoming this and is locked.

By locking and mounting the terminal plate 7, the previously assembled speaker components are clamped and fixed between the stepped portion 12 and the plate 8, as shown in FIG.

At this time, if the resistor 6 is made of an elastic sheet, it effectively acts on escape when the terminal plate 7 is press-fitted and stabilizes the fixed state.

(Effects of the invention) As described above, according to the speaker of the invention, the annular wall of the outer case serving as a protector is provided with the voice coil lead guide groove and the hooking claw, while the terminal board of the last component to be assembled is The speaker components can be fixed to the case by press-fitting and locking the protruding tabs into the locking claws, thereby eliminating the need for fixing methods such as gluing or welding in conventional products. Therefore, the assembly work is extremely easy, and in particular, by assembling using this locking means, once the lug portion is assembled, it can be removed from the locking claw by prying it with the tip of a screwdriver or a jig. As a result, if a defect is discovered during a performance inspection of a finished product, it can be remanufactured by replacing parts, etc. As a result, the product yield is high and the product cost is reduced. is extremely useful in practical use.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing an embodiment of the speaker of the present invention, FIG. 2 is a longitudinal cross-sectional side view showing its assembled state, FIG. 3 is a perspective view showing the structure of the hooking claw in the speaker of the present invention, The figure is also an enlarged side view taken longitudinally along the line xx--x in FIG. 3. DESCRIPTION OF SYMBOLS 1... Case, 2... Diaphragm, 3... Plate, 4... Magnet, 5... Yoke, 6... Register, 7... Terminal board, 12... Assembly step, 13... Annular wall, 14... Groove, 15... Engaging pawl, 16... Cut groove, 17... Voice coil, 18
...Reed part, 25...Protruding ear piece.

Claims (1)

[Claims for Utility Model Registration] (1) Several hooking claws are formed on the rear edge of the annular wall of the speaker case made of a synthetic resin molded body, and a cut groove for drawing out the lead portion of the voice coil is formed. The speaker components are sequentially inserted into the annular wall and assembled, and the ear pieces of the terminal board with projecting ear pieces are press-fitted into the locking claw positions to fix the speaker components in the annular wall. A headphone speaker characterized by having the following configuration. (2) The headphone speaker according to claim 1, wherein the resistor interposed between the yoke with a central magnetic pole of the speaker component and the terminal plate is made of an elastic sheet such as urethane foam. (3) The headphones speaker according to claim 1, wherein the locking pawl is a non-return pawl formed in a groove in which a portion of the wall thickness of the annular wall is removed.