JPH08147730A - Actuator device for optical pickup - Google Patents

Abstract

(57) [Abstract] [Purpose] Regarding an actuator device for an optical pickup, a printed circuit board for relaying a drive coil and a metal wire is abolished, and further, a terminal treatment of the coil can be carried out to automate a manufacturing process and reduce a price. The purpose is to ensure that [Structure] Protrusions 8 are integrally provided at four positions of the holder 2, and the ends of the tracking coil 3 and the focus coil 4 wound around the holder 2 are locked to the protrusions 8. By installing the metal wire 6 on this locking portion and fixing it with the solder 7, the metal wire 6, the tracking coil 3 and the focus coil 4 become conductive, the printed circuit board for relay is abolished, and the coil is further removed. Since terminal processing can be performed, automation of the manufacturing process and cost reduction are realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an actuator device for an optical pickup of a disc player, which projects a light spot on a disc-shaped recording medium to optically read information.

[0002]

2. Description of the Related Art In recent years, with the downsizing and cost reduction of disk players, the demand for actuator devices for optical pickups has increased. A conventional actuator device for an optical pickup will be described below. FIG. 4 shows the structure of a conventional actuator device for an optical pickup. In FIG. 4, reference numeral 1 denotes an objective lens, and this objective lens 1 is held by a holder 2 made of resin. A tracking coil 3 and a focus coil 4 are wound around the holder 2 so as to form a right angle with each other.
Printed circuit boards 5 are attached to both side surfaces of the holder 2, and the start ends and the terminal ends of the tracking coil 3 and the focus coil 4 are fixed to the conductive patterns 5a and 5b on the printed circuit boards 5 by soldering. Has been done. Reference numeral 6 denotes an elastically deformable metal wire made of phosphor bronze or the like, one end of which is fixed to a moving base (not shown), and the other end of which is the conductive pattern 5 of the printed circuit board 5.
Each of a and 5b is fixed with solder.

That is, the holder 2 is supported on the moving base by four metal wires 6, and a predetermined driving current is supplied to the coils 3 and 4 through the metal wires 6. Then, by selectively passing a drive current through the coils 3 and 4, the tracking coil 3 and the focus coil 4 receive the magnetism of a magnet (not shown) fixed to the moving table, and the holder 2 moves in the tracking and focus directions. To drive.

[0004]

By the way, in recent years, with the rapid increase in demand for optical pickups, automation of the manufacturing process and cost reduction have been studied.
Since the terminals of the tracking coil 3 and the focus coil 4 have not been processed, it is necessary to manually solder the ends of the coils to the printed circuit board. In addition, it is unnecessary to attach the printed circuit board 5 for relay to the holder 2. A process was needed. For the above reason, it has been an obstacle to automation of the manufacturing process of the actuator of the optical pickup and cost reduction.

The present invention focuses on the above problems, and an object thereof is to provide automation of the manufacturing process of an actuator device of an optical pickup and cost reduction.

[0006]

In order to solve the above problems, an actuator device of an optical pickup according to the present invention is characterized in that a protrusion is provided on a holder for end treatment of a drive coil and fixing a metal wire.

[0007]

With the above configuration, the terminal processing of the drive coil and
Since the relay printed circuit board can be eliminated, automation of the manufacturing process of the actuator device of the optical pickup and cost reduction can be realized.

[0008]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the same components as those of the conventional example shown in FIG. 4 are designated by the same reference numerals. The difference between the conventional example and the present example is that, instead of the printed circuit board 5, the holder 2 is integrally provided with four protrusions 8.

As shown in FIG. 2, a V-groove 11 is formed on the surface of the protruding portion 8 and a metal plating 10 such as copper plating is applied to the surface, and the portion other than the V-groove 11 is coiled. The terminal 9 is wound and locked. A reflow process is performed only on this locking portion to remove the insulating film of the coil end 9 and bond it to the protrusion 8. After the reflow, the metal wire 6 is placed in the V groove 11 and fixed by the solder 7. At this time, the metal wire 6
Is independently and accurately fixed without being affected by the locked state of the drive coil or the reflow state, and the metal wire 6 and the tracking coil 3 or the focus coil 4 have conduction.

(Embodiment 2) FIG. 3 shows another structure of the projecting portion 8 in which a through hole 12 is provided in place of the above-mentioned V groove 11, and the metal wire 6 is inserted into the through hole 12. It is configured to be soldered.

[0011]

As described above, in the actuator device of the optical pickup according to the present invention, since the holder is provided with the protruding portion and the drive coil terminal processing and the printed circuit board for relay can be eliminated, the manufacturing process of the actuator for the optical pickup can be automated. Lower prices can be realized.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of an actuator device for an optical pickup according to the present invention.

FIG. 2 is an enlarged perspective view showing a main part of the embodiment.

FIG. 3 is an enlarged perspective view showing a main part of another embodiment of the present invention.

FIG. 4 is a perspective view showing an actuator device of a conventional optical pickup.

[Explanation of Codes] 1 Objective Lens 2 Holder 3 Tracking Coil 4 Focus Coil 5 Printed Circuit Board 6 Metal Wire 7 Solder 8 Projection 9 Coil Terminal 10 Metal Plating 11 V Groove 12 Through Hole

Claims (3)

[Claims] 1. A holder for holding an objective lens, a focus coil and a tracking coil wound around the holder in directions perpendicular to each other, four metal wires for supporting the conductive holder, and In an actuator device of an optical pickup including a magnetic circuit for applying a magnetic field to a drive coil, a protrusion is provided on the holder, the start end and the end of the drive coil are locked to the protrusion, and the metal wire is connected to the protrusion. An actuator device for an optical pickup, characterized in that it is fixed to the drive coil and is electrically connected to the starting end and the terminating end of the drive coil to supply a drive current to the drive coil through the metal wire. 2. An actuator device for an optical pickup according to claim 1, wherein the protrusion is provided with a V groove for metal plating and metal wire positioning. 3. An actuator device for an optical pickup according to claim 1, wherein the projection is provided with a hole for copper plating and a metal wire positioning.