JP2002237068A - Optical pickup - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive optical pickup which has high sensitivity and high quality, is excellent in mass-productivity in both handwork and automation and moreover is adaptable to ISO14001. SOLUTION: A flange soldered previously by binding coil terminals 4 is removed and also slit forming flanges 3b by which the coil terminals 4 are easily drawn around, fixed and styled without sticking are provided, the coil terminals 4 which are hang on the flange 3b and drawn around are wound on suspension wires 2, and the coil terminals 4 are directly joined by soldering or are joined by welding without previous soldering.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for reading information from an optical information recording medium such as a DVD disk and a CD disk,
Alternatively, the present invention relates to an optical pickup having a function of writing information on an optical information recording medium or having both functions, and in particular, a coil terminal for focus control and tracking control for laser spot position control (hereinafter simply referred to as a coil terminal). The present invention relates to a suspension wire joining structure.

[0002]

2. Description of the Related Art A coil terminal and a suspension wire are joined by providing a coil terminal binding flange in the direction of a suspension wire free end (a side opposite to a damping holder) of a suspension wire holding flange portion of a coil fixing holder, and the flange is provided with a coil. In general, the terminal is entangled and soldered, and a suspension wire is further soldered or welded to the soldered portion.

FIGS. 5 and 6 show such a state.
Is a side view of the optical pickup actuator, and FIG. 6 is a front view of the optical pickup actuator. In the figure, 1 is a damping holder, 2 is a suspension wire, 3
Denotes a coil fixing holder, 4 denotes a coil end, 5 denotes a resin flange for binding the coil end, and 6 denotes a solder joint. As shown in these figures, the coil terminal 4 was entangled with the entanglement collar 5 and soldered, and the suspension wire 2 was soldered thereon.

[0004]

The joint structure between the suspension wire 2 and the coil end 4 has the following disadvantages.

(1) Since the suspension wire holding flange and the coil terminal tying collar are located close to each other, the workability of tying the coil terminal to the coil terminal tying flange is poor, and it takes a long working time. The rate of occurrence of poor cutting and entanglement flange breakage is high.

(2) Since a large amount of solder having a large specific gravity is provided and the mass is large, performance such as sensitivity of the actuator is reduced.

(3) The defect occurrence rate of scattered adhesion of flux and solder is high.

(4) It is incompatible with lead-free for improving the global environment.

SUMMARY OF THE INVENTION An object of the present invention is to provide an optical pickup which solves such disadvantages of the prior art, has high sensitivity, high quality, is excellent in mass productivity, is inexpensive, and can conform to International Standard (ISO) -14001. It is in.

[0010]

In order to achieve the above object, a first means is to read optical information from an optical information recording medium, write optical information to an optical information recording medium, or perform both functions. In an optical pickup having a structure in which a laser wire position control is performed by attaching a suspension wire to a coil wire for focus control and tracking control for suspension wire versus drive actuator type laser spot position control and a suspension wire, or A structure in which the coil ends are wound around the suspension wire, or the coil end is wound around the suspension wire, and the coil end is soldered or directly joined without welding solder to the joint between the coil end and the suspension wire. It is characterized by the following.

[0011] A second means of the present invention is the first means, wherein the starting point of the coil terminal is set at a position opposite to the end face of the suspension wire joint and at a position where it can be easily routed to the joint of the suspension wire and styled. Join and fix to the coil fixing holder or coil body,
The joint between the coil terminal and the suspension wire is directly soldered or welded, for example, by arc welding.

According to a third aspect of the present invention, there is provided an optical pickup having a function of reading optical information from an optical information recording medium and / or writing optical information to the optical information recording medium, or controlling the position of a laser spot. The structure of the coil fixing holder, which serves as a fixed housing of the focus control coil and the coil terminal for tracking control, is provided with a slit forming flange for fixing the coil terminal by bending and press-fitting, and the coil terminal is formed on the slit forming flange. It is characterized in that it is fixed by the bending force of the slit forming flange, the elastic deformation reaction force of the coil end, or an adhesive.

According to a fourth aspect of the present invention, in the third aspect, a terminal hooking groove is provided in a suspension wire holding flange portion of the coil fixing holder, and the coil terminal is fixed to the coil fixing slit forming flange through the hooking groove. It is characterized by doing.

According to a fifth aspect of the present invention, in the third aspect, the intermediate portion between the coil holder bonding portion of the winding coil and the coil terminal is fixed to a fixed slit forming flange, and the terminal portion of the coil terminal is linearly connected. The suspension wire holding flange is provided with a terminal hooking rib and pulled out.

The lead-out point of the coil terminal of the focus control coil and the tracking control coil for controlling the laser spot position is set at a position opposite to the end face of the suspension wire joint and at a position where it can be easily routed to the suspension wire joint and styled. It is characterized in that it is fixed by a method of joining to a fixed holder or a coil body, and a joining portion between a coil end and a suspension wire is directly soldered or welded.

[0016]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a side view of the optical pickup actuator according to the embodiment, FIG. 2 is a front view of the optical pickup actuator, FIG. 3 is an enlarged view of FIG. 1X, and FIG. 4 is an enlarged view of FIG. 2Y.

Four suspension wires 2 are implanted on the damping holder 1 of the optical pickup actuator, and the coil fixing holder 3 is bonded and fixed to the suspension wire 2 by its suspension wire fixing rib 3a.

The coil terminal 4 is hooked on a slit forming flange 3b provided on the coil fixing holder 3, and the intermediate portion is fixed by pressure contact by a bending force. The end of the suspension wire 2 is joined to the suspension wire 2 by welding, such as soldering or arc welding, while being wound without solder. Reference numeral 7 in the drawing denotes a joint portion formed by soldering or welding.

[0019]

According to the present invention, a flange for entanglement of the coil terminal and soldering is omitted, and a slit forming flange or the like which can easily draw and fix and style the coil terminal without adhesion is provided. By winding the coil terminal hooked and wrapped around the flange around the suspension wire and joining it directly by soldering or welding without picking up the coil terminal, high sensitivity, high quality, excellent mass productivity of both manual work and automation, and inexpensive, and An optical pickup compatible with ISO14001 can be provided.

[Brief description of the drawings]

FIG. 1 is a side view of an optical pickup actuator according to an embodiment of the present invention.

FIG. 2 is a front view of the pickup actuator.

FIG. 3 is an enlarged view of a part X in FIG. 1;

FIG. 4 is an enlarged view of a portion Y in FIG. 2;

FIG. 5 is a side view of a conventional optical pickup actuator.

FIG. 6 is a front view of the optical pickup actuator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Damping holder 2 Suspension wire 3 Coil fixing holder 3a Suspension wire fixing rib 3b Slit forming flange 4 Coil end 7 Joint

Claims (5)

[Claims] 1. An optical pickup which has a function of reading information from an optical information recording medium and / or writing information on the optical information recording medium, and performing laser spot position control by a suspension wire versus drive actuator system. A structure in which the joining structure of the coil terminal for focus control and tracking control for controlling the laser spot position and the suspension wire is attached in parallel, or a structure in which the joining is performed by crossing, or the coil terminal is wound around the suspension wire. An optical pickup characterized in that the coil terminal is soldered or welded directly to the joint between the coil terminal and the suspension wire without or with soldering. 2. A coil fixing holder according to claim 1, wherein a starting point of pulling out the coil terminal is set at a position opposite to an end face of the suspension wire joint and at a position where it can be easily drawn and styled to the joint of the suspension wire. Alternatively, an optical pickup fixed to a coil body and directly joining a coil end and a suspension wire by soldering or welding. 3. Optical information is read from an optical information recording medium,
Alternatively, in an optical pickup having a function of writing optical information on an optical information recording medium or both, a structure of a coil fixing holder serving as a fixing housing of a focus control coil for controlling a laser spot position and a coil terminal for tracking control. A slit forming flange for fixing the coil terminal by bending press-fitting, and fixing the coil terminal to the slit forming flange by a bending force of the slit forming flange or an elastic deformation reaction force of the coil terminal or an adhesive. Optical pickup. 4. The optical pickup according to claim 3, wherein a terminal hooking groove is provided in a suspension wire holding flange of the coil fixing holder, and the coil terminal is fixed to the coil fixing slit forming flange through the hooking groove. An optical pickup that features. 5. The optical pickup according to claim 3, wherein an intermediate portion between the coil holder bonding portion of the winding coil and the coil terminal is fixed to a fixed slit forming flange, and the terminal portion of the coil terminal is pulled out linearly. An optical pickup characterized in that a terminal hooking rib is provided on a suspension wire holding flange portion and pulled out.