JPS626862Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coil holder for a moving linear motor that drives an objective lens, etc. in an optical video disc player.

Conventionally, lead wires used in the moving parts of moving type linear motors are connected to coil terminal wires by a connection processing method as shown in FIGS. 1 and 2.

That is, in the one shown in FIG. 1, the lead wires 2 and 3 of the coil 1 are soldered to pins or eyelets 5 provided on the flange portion 4A of the coil holder 4 made of a synthetic resin material or the like that supports the coil 1. Further, the coil terminal wires 1A and 1B are soldered to the pin or eyelet 5 at the soldering portion 6.

In addition, in the one in FIG. 2, the coil terminal wire 1
A, 1B and each lead wire 2, 3 are soldered to each other by a soldering part 6 via a printed board 7.

In this way, the lead wires 2 and 3 are soldered at the soldering portion 6 in any of the above-mentioned devices.

By the way, since the moving coil type linear motor is configured such that the coil 1 moves vertically together with the coil holder 4 when a certain voltage is applied, the arrangement of the lead wires 2 and 3 as described above is With this structure, the solder in the soldering part 6 flows to the lead wires 2, 3, the lead wire base parts 2A, 3A become hard, and when the coil 1 moves in the vertical direction together with the coil holder 4, the lead wires 2, 3 There was a risk that the force would be transmitted to the base of the wire, causing wire breakage or half-breakage.

Therefore, the present invention has been proposed in view of the above-mentioned circumstances, and its purpose is to prevent disconnection at the soldered portion of the lead wire and to improve the reliability of the lead wire.

That is, the present invention provides a coil holder for a moving linear motor, in which a flange portion is provided on the coil holder around which the coil is wound, and the coil terminal and the lead wire for power supply to the coil are connected via the flange portion. At the same time, a small hole is formed in the flange portion near the connection portion between the coil end and the lead wire, and the lead wire is inserted through the small hole.

Hereinafter, an example of an embodiment of the present invention shown in the drawings will be described.

FIG. 3 is an exploded perspective view when a moving linear motor to which the present invention is applied is used in an objective lens drive section of an optical video disc player.
FIG. 4 is a rear perspective view of the movable part, and FIG. 5 is an enlarged sectional view of the soldered part.

In these figures, A is a movable part and B is a fixed part.
The movable part A is a coil 1 wound in a cylindrical shape around a coil holder 10 made of plastic material or the like.
A through hole 12 is formed in the axial direction of the central portion of the coil holder 10, and an objective lens is integrally built into the hole 12. Further, the flange portion 10A of the coil holder 10 is provided with an eyelet 13 made of a solder-friendly material, for example.
13 is fitted and disposed, and the terminal wires 11A, 11 of the coil 11 are inserted into the holes 13A of the eyelets 13, 13.
B and the ends 14A, 14A of the lead wires 14, 14 are inserted and fixed by soldering with solder 15. Further, the lead wire 14,
Small through holes 16, 16 for insertion of 14 are formed. Further, a positioning hole 17 is formed through the flange portion 10A, and is relatively engaged with a positioning pin 18A protruding from the annular holder 18, thereby restricting movement in the circumferential direction.

The coil 11 also includes an annular yoke 19,
19 and magnet 20 are attached, and these 1
It is inserted into the coil insertion part 21 formed inside the coils 9 and 20.

Therefore, the lead wires 14, 14 have ends 14A, 1
4A side portion to the surface 10a of the flange portion 10A.
It is inserted into the small holes 16, 16 from the side to protrude to the back surface 10b side, and further inserted into the holes 13A of the eyelets 13, 13 from the back surface 10b side. Note that the terminal wires 11A, 11B of the coil 11 are also inserted into the eyelets 13, 13, and these lead wire ends 14A, 14B and the coil terminal wires 11A, 11B are inserted.
are connected and fixed by soldering to the eyelets 13, 13.

In the above configuration, when the coil holder 10 moves in the vertical direction, the force of the lead wires 14, 14 is concentrated on the small holes 16, 16 of the holder flange portion 14A, and no force is directly applied to the soldered portion. Become.

Therefore, the occurrence of breakage or half-breakage of the lead wires 14, 14 can be prevented, and the reliability of the lead wires can be improved.

Note that the lead wires 14,
If the coil holder 14 is simply inserted through the coil holder 14, there will be play, and there is a risk that some force will be applied to the soldered portion when the coil holder 10 moves in the vertical direction. Therefore, in order to completely prevent such a situation,
If the lead wires 14, 14 are fixed in the small holes 16, 16 by applying a damping agent 22 inside the small holes 16, 16, the transmission of force to the soldered parts during operation is completely prevented, improving reliability. can be further improved (see Figure 6).

In the above embodiment, the soldering part between the lead wire and the coil terminal wire is provided with an eyelet on the coil holder, and the soldering is performed on this eyelet. The soldering portion may be configured depending on the structure. As mentioned above, the present invention provides a flange part on the coil holder and connects the coil terminal and the lead wire through this flange part, so the work of connecting the coil terminal and the lead wire is extremely quick. can be done.

In addition, the present invention creates a small hole in the flange and inserts the lead wire into the small hole and fixes it, thereby preventing the force associated with the operation of the coil holder from being applied directly to the connection part such as the soldering part. can do. Therefore, occurrence of breakage or half-breakage of the lead wire can be prevented, and the reliability of the lead wire can be improved.

Furthermore, since the present invention has the above-described configuration, it is extremely easy to manufacture compared to conventional moving type coil holders.

[Brief explanation of the drawing]

FIG. 1 and FIG. 2 are both perspective views of the back side of the main parts of the conventional example. Fig. 3 is an exploded perspective view showing one embodiment of the present invention, Fig. 4 is a rear perspective view of the main part, Fig. 5 is an enlarged sectional view of the soldering part, and Fig. 6 is another example of the small hole part. FIG. 10... Coil holder, 10A... Flange section, 11... Coil, 13... Eyelet, 14...
Lead wire, 14A... End of lead wire, 15...
Handa, 16...Small hole.

Claims (1)

[Claims for Utility Model Registration] In a coil holder for a moving linear motor, a flange portion is provided on the coil holder around which the coil is wound, and a lead for power supply to the coil terminal and this coil is connected via the flange portion. A moving type linear motor coil holder is provided, in which a small hole is formed in the flange portion near the connection point between the coil terminal and the lead wire, and the lead wire is inserted through the small hole.