JPS62141899A - Voice coil of speaker - Google Patents

Abstract

PURPOSE:To reduce the vibration mode causing a broken lead wire and to improve the mechanical durability by forming a notch for fitting a tinsel wire to the upper part of a bobbin of a moving coil type voice coil and fixing the tinsel wire. CONSTITUTION:A reinforcing paper sheet 10 and a coil 9 are wound to a cylindrical bobbin 11. The notch 13 for fitting the tinsel wire is formed to the upper part of the bobbin 11. The notch 13 consists of a hole 16 and a guide 17 tapered downward from the upper end of the bobbin 11 toward the hole 16 and a couple of the notches are formed to each lead wire 12. In fitting the tinsel wire 7, the tinsel wire 7 whose tip is curved in a U-shape is fitted from the upper direction to a couple of the notches 13 and fixed in the hole 16 through the guide 17. Then the lead wire 12 is soldered to the tip of the fixed tinsel wire 7 and an adhesives 14 is applied to the curved part of the tinsel wire 7 at the inner side of the bobbin 11. Further, the adhesives 15 is applied to cover the solder joint between the tinsel wire 7 and the lead wire 12.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a voice coil for a speaker, and more particularly to a voice coil for a moving coil type speaker.

BACKGROUND OF THE INVENTION Conventionally, the voice coil of this type of speaker has been of M4 construction as shown in FIG. In other words, on the speaker structure, the lead wire 6 is connected to the gold thread Pi! on the cone surface 8! It had a structure that was mechanically connected to 7.

In other words, the lead 16 of the voice coil and the gold thread 17 were connected via the cone surface 8 in a length of 4M x 3m.

In addition, in Fig. 4, d3, 1 is the coil, 2 is the reinforcing paper, and 3 is the coil.
is a bobbin.

In another embodiment, a gold thread 7 was attached to the bobbin 3, as shown in FIG.

Problems to be Solved by the Invention However, with the configuration of the voice coil shown in FIG. There was a possibility that the lead wire 6 and the gold thread Pi 17 would fall off.

In order to eliminate the problem of the voice coil shown in FIG. 4, the voice coil shown in FIG.
It is a well-built structure. When using this @ structure, lead wire 6
It is possible to avoid joining the gold thread wire 7 on the cone surface,
Problems such as wire breakage when the cone surface has a large amplitude can be eliminated. However, since the gold thread wire 7 is attached to the bobbin 3 and has a substantial outer diameter, there is a problem that fitting with the cone surface 8 becomes difficult and workability deteriorates.

Therefore, the present invention provides a voice coil for a speaker made of M4 construction, which can improve the bonding strength between the lead wire and the gold thread wire without impairing workability.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a moving coil type voice coil in which a notch for attaching a gold thread is formed in the upper part of the bobbin.

Function: By gluing and fixing a gold thread wire to the notch and soldering the lead wire to this, the influence of the amplitude of the cone surface is minimized, and the disconnection of the lead wire can be prevented by the MG block. can be done. Furthermore, since the lead wire is fixed outside the voice coil, the bending mode of the lead wire is reduced, and breakage due to this bending is eliminated. In addition, since there is no gold thread on the bobbin, the outer diameter of the bobbin does not increase, making it easy to fit the cone surface and work efficiently.

EXAMPLE An example of the present invention will be described below. In FIGS. 1 to 3, 11 is a cylindrical bobbin, and a reinforcing paper 10 and a coil 9 are wound around this bobbin 11. 12 is a pair of lead wires. A notch 13 for attaching a gold thread is formed in the upper part of the bobbin 11. This notch 13 is composed of a hole 16 and a guide portion 17 that is tapered downward from the upper end of the bobbin 11 toward the hole 16, and is formed in pairs for each lead wire 12.

In such a configuration, in order to attach the gold thread wires, as shown in FIG. 17
It is fixed in the hole 16 through the hole 16. Next, the lead wire 12 is soldered and fixed to the tip of the fixed gold thread a7, and then adhesive 14 is applied to the curved portion of the gold thread wire 7 inside the bobbin 11. Furthermore, the adhesive 15 is applied so as to cover the soldered joint between the gold thread 117 and the lead 1Q12.

In this way, the lead wire 12 does not come into contact with the cone surface 8, so that breakage due to vibration of the cone surface 8 is less likely to occur, and the lead wire 12 and the gold thread 1! It has the advantage of being less likely to come off with i17. Further, since the outer diameter of the bobbin 11 does not increase, there is an advantage that the bobbin 11 and the cone surface 8 can be easily fitted, and the work can be carried out efficiently.

Effects of the Invention As described above, according to the present invention, a cutout for attaching the gold thread wire is formed in the upper part of the bobbin, and by fixing the gold thread wire in this cutout, the disconnection vibration mode of the lead and wire can be reduced. It is possible to improve mechanical durability. As a result, the mechanical strength can be more than doubled compared to the conventional structure.

[Brief explanation of drawings]

Figure 1 is an enlarged view of the upper part of the voice coil of the speaker according to the 1F light, Figure 2 is its entire front view, Figure 3 is a plan view showing how the gold thread wire is attached, and Figure 4 is a conventional example. 5 are diagrams showing other conventional examples. 11... Bobbin, 12... Lead wire, 13... Notch agent Yoshihiro Morimoto Figure 1 Figure 3 Figure 4 ω (b) Figure j

Claims (1)

[Claims] 1. A speaker voice coil characterized in that a notch for attaching a gold thread wire is formed in the upper part of the bobbin of the moving coil type voice coil.