JPS62207000A - Manufacture of voice coil for speaker - Google Patents

Abstract

PURPOSE:To stably hold the connecting position of both lead wires by bending a voice coil and sandwiching a pull-out lead wire. CONSTITUTION:Two lead wires 3 and 4 at the starting of the winding and the ending of the winding of a voice coil 2 are pulled out ina a specified direction, for example, in the direction of the shaft (cylindrical shaft) of a bobbin. Next, a lead wire 6 is placed so as to cross to the lead wires 3 and 4. Two voice coil lead wires 3 and 4 are pulled out and bent at the part to cross with a pull-out lead wire 6, and a bending part 7 and the pull-out lead wire 6 are soldered. One place 8 of the part of the clearance connected with the voice coil lead wire of the pull-out lead wire 6 is cut out. Next, the pull-out lead wire 6 is drawn apart from right to left by pulling apart for a necessary time (d).

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a technology for manufacturing voice coils for speakers, and more particularly to a voice coil manufacturing method for facilitating voice coil manufacturing and improving productivity.

[Prior art and its problems]

To manufacture a voice coil for a speaker, a cylindrical coil bobbin made of an insulator is usually prepared, the voice coil is wound around it, and a lead wire is connected directly to the beginning and end of the winding. is pulled out to the terminal.

To this end, a conventional method of manufacturing speakers employs a method in which the two lead wires of the voice coil are drawn out and soldered to the lead wires on cone paper, and the drawn lead wires are drawn out to an external terminal.

However, with this method, everything depends on manual work, and extremely detailed manual work is required, resulting in poor workability, many connection failures, and the need to mechanically reinforce the connected part with adhesive or the like. The work process has become even more complicated and tedious.

The following voice coil manufacturing methods are currently known and have been devised to improve these drawbacks and streamline operations.

As shown in FIG. 2(A), the winding end portions 13 and 14 of the voice coil 12 wound around the voice coil bobbin 11 and the lead wire 15. 16 in contact with the end of the same figure (B
), they are connected by soldering one by one.

Even with this complicated manufacturing method, the positioning and holding of the end of the voice coil and the end of the lead wire are unstable, so the problems of workability and productivity due to poor contact are still unsolved, and there is also an increase in cost. It was also relatively expensive.

〔the purpose〕

The present invention was made to solve the above problems.
The purpose is to facilitate the manufacture of speaker voice coils,
Our goal is to provide a manufacturing method that can improve productivity.

[Means for solving the invention]

The outline of the invention disclosed by the present inventor is as follows.

In other words, in the method of manufacturing voice coils for speakers,
A voice coil is wound around a cylindrical voice coil bobbin whose surface is thickly varnished, and the voice coil is pulled out in a fixed direction on the surface of the bobbin.The lead wire is partially varnished at the beginning and end of the voice coil. , fold the beginning and end of the voice coil so as to sandwich this lead wire, and connect by soldering. Then, connect the unnecessary part of the voice coil and the part between the connection point of the lead wire for 1 ? The wire is cut at the +IJ location, and then the connection point is adhered to the bobbin with the varnish while the lead wire is pulled apart to the left and right.

[Effect]

By bending the voice coil and sandwiching the lead wire, the connection position between the two can be held stably, making it possible to make a good connection with solder, and by applying varnish in advance, the connection point can be fixed to the bobbin. becomes easier.

〔Example〕

FIGS. 1A to 1F show an embodiment of the present invention, and are perspective views of each step of the voice coil manufacturing process.

Each process will be explained in detail below.

(A) A voice coil 2 is wound around a voice coil 1 made of a cylindrical insulator. The surface of the voice coil bobbin 1 is normally varnished, but in the present invention, the varnish is applied, for example, a plurality of times, so that the varnish is thicker than usual. The two lead wires 3.4 at the beginning and end of winding of the voice coil 2 are pulled out in a certain direction, for example, in the direction of the bobbin axis (cylindrical axis).

(B) Place the lead wire 6 so as to intersect the two lead wires 3.4, that is, in a direction perpendicular to the axis of the bobbin. The central part of this lead wire 6 is varnished, and this varnished portion 5 is always placed across the two voice coil lead wires 3.4, and the varnished voice coil bobbin 1. Make sure it touches the surface.

By heating this varnished portion 5, the lead wire 6 is temporarily bonded to the voice coil bobbin l.

(C) The two voice coil lead wires 3 and 4 are bent at the point where they intersect with the lead wire 6, and the lead wires are sandwiched and fixed lightly. In this state, the bent portion 7 of the voice coil lead wire and the lead wire 6
and solder.

([)] Cut and remove unnecessary parts from the above-mentioned bent portion of the voice coil lead wire 3.4.

(E) Cut a portion 8 of the lead wire 6 between the part where it is connected to the voice coil lead wire.

(F) While melting the varnish by heating the joint 7 between the voice coil lead wire 3.4 and the pull-out lead wire, pull the pull-out lead wire 6 apart by the required distance d from side to side, and then cool it. Then, the joint portion (bent portion) 7 is fixed to the voice coil bobbin 1 in a few seconds using the already applied varnish.

FIG. 2F shows the completed form of the voice coil to which the lead wire 6 is connected.

〔effect〕

According to the present invention described in the above embodiments, the voice coil and the lead wire can be held stably when they are connected, and the connecting portion can be quickly and reliably fixed to the bobbin.
Therefore, it has great benefits, such as superior workability, cost savings, and increased possibilities for automation.

Brief Description of the Drawings FIGS. 1(A) to 1(F) are process perspective views of a voice coil manufacturing method showing an embodiment of the present invention.

FIGS. 2A and 2B are partial process perspective views showing an example of a conventional voice coil manufacturing method.

1...Voice coil bobbin, 2...Voice coil 3...
Starting part of coil winding, 4...End part of coil winding, 5...
Varnish processing part, 6... Lead wire, 7... (Lead bending part) joint part.

Claims (1)

[Claims] 1. The voice coil is wound around a voice coil bobbin whose surface has been treated with a thick varnish, and the voice coil is pulled out in a certain direction on the surface of the bobbin, and the winding start and end portions are partially varnished. Cross the drawn-out lead wires, and connect the drawn-out lead wires and the voice coil by bending the winding start and end of the voice coil so as to sandwich the drawn-out lead wires, thereby eliminating the need for the voice coil. A speaker characterized in that, at the same time as cutting out at least one part of the lead wire between the connection parts, the lead wire is separated to the left and right and the connection part is joined onto a varnished bobbin. Method of manufacturing voice coils for