JPH08203117A - Production of optical pickup of disk device and optical pickup of disk device produced by this method - Google Patents

Abstract

PURPOSE: To simplify the production process of an optical pickup of disk device. CONSTITUTION: A lens holder 2 and an insulating member 6 are formed into one body. A spring member 5 is formed between the lens holder 2 and the insulating member 6, while the insulating member 6 is attached to a base 2. Then, the lens holder 2 is separated by cutting from the insulating member 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention reads information recorded on a disc such as a magneto-optical disc with a light beam.
Alternatively, the present invention relates to a method of manufacturing an optical pickup of a disk device that records information on a disk by a light beam and an optical pickup manufactured by the manufacturing method, and in particular, to an optical pickup of a disk device that can be manufactured easily. The present invention relates to a manufacturing method and an optical pickup of a disk device manufactured by the manufacturing method.

[0002]

2. Description of the Related Art An optical pickup of a disk device is shown in FIG.
As shown in FIG. 1, a lens 1 for tracking or focusing a light beam on a disc (not shown) is provided, and the lens 1 is formed in an annular shape and an end of a lens holder 2 around which a coil is wound. Is attached to the section. In the hole 2a at the center of the lens holder 2, the magnetic material 3
Are arranged, and the magnetic body 3 is fixed to the base 4. The lens holder 2 is movably connected to the base 4 by a plurality of rod-shaped spring members 5 (may be flat spring members).
The spring member 5 also serves as a lead wire for passing a control current through the coil of the lens holder 2. Further, the base 4 and the spring member 5 are adhered to each other via the insulating member 6. Therefore, when a control current is applied to the coil, a magnetic field is generated in the lens holder 2, and the magnetic field acts on the magnetic field of the magnetic body 3 to move the lens 1 together with the lens holder 2 in a direction parallel to or perpendicular to the disk surface. It can be controlled so that the light beam is tracked or focused.

Incidentally, in the manufacture of this optical pickup, the lens 1, the lens holder 2, the magnetic body 3, the base 4, the spring member 5 and the insulating member 6 have been conventionally assembled as follows. That is, as shown in FIG.
First, using a predetermined jig (not shown), the lens holder 2
The lens 1 is mounted on the base 4, and the magnetic body 3 and the insulating member 6 are mounted on the base 4. Next, the lens holder 2 and the base 4 are set in an assembled state using another jig (not shown). Then, as shown in FIG. 3, the spring member 5 is
The insulating member 6 mounted on the base 4 and the lens holder 2 are bonded so as to be connected to each other.

[0004]

However, since the components such as the lens holder 2, the base 4, the insulating member 6 and the like are fine components, they are set in an assembled state using a jig or the like and assembled. Is a very complicated task,
It has a problem of poor production efficiency.

Further, conventionally, since the position and angle of the lens holder 2 with respect to the base 4 are set when the lens holder 2 and the base 4 which are separate bodies are connected by the spring members 5, respectively. It was difficult to accurately set the optical axis of the lens 1 mounted on the base 4 with respect to the base 4. Therefore, after the lens 1, the lens holder 2, the magnetic body 3, the base 4, the spring member 5, and the insulating member 6 are assembled, it is difficult to adjust the optical axis of the lens 1 when fixing the assembly to the frame of the optical pickup. It was complicated.

In view of the above circumstances, it is an object of the present invention to provide a method for manufacturing an optical pickup for a disk device which can be manufactured easily and an optical pickup for a disk device manufactured by the manufacturing method.

[0007]

According to a first aspect of the present invention, there is provided a method of manufacturing an optical pickup of a disk device, wherein a lens for tracking or focusing a light beam on the disk, a lens mounted on the lens, and a coil are provided. A lens holder, a magnetic body arranged corresponding to a coil of the lens holder, a base to which the magnetic body is fixed, an insulating member mounted on the base, and a lens provided between the insulating member and the lens holder. A method for manufacturing an optical pickup of a disk device, which movably supports a holder relative to a base and also assembles a spring member that also serves as a lead wire of a coil. Attach the spring member between the insulating member, cut the lens holder and the insulating member, and then attach the insulating member to the base. And wherein the kick it.

According to a second aspect of the present invention, there is provided a method of manufacturing an optical pickup for a disk device, wherein when a lens holder and an insulating member are integrally molded, a grip portion is formed around the lens holder and the lens holder and the insulating member are cut. In addition, the gripping portion is also cut off.

An optical pickup for a disc device according to a third aspect is the optical pickup for a disc device manufactured by the method for manufacturing an optical pickup for a disc device according to the first aspect, wherein the lens holder and the insulating member are provided with a lens holder. And a cut mark when the insulating member is cut.

[0010]

According to a first aspect of the present invention, there is provided a method of manufacturing an optical pickup for a disk device, wherein a lens holder and an insulating member are integrally molded, a spring member is provided between the lens holder and the insulating member, and the insulating member is attached to the base. Due to
The complicated work of setting the insulating member on the base and setting the lens holder on the base can be performed at one time. Moreover, since the insulating member and the lens holder are connected by the spring member in the state where the lens holder and the insulating member are integrally molded, the position and angle of the lens holder with respect to the insulating member can be set with high accuracy.
Therefore, even when the insulating member is attached to the base, the position and the angle of the lens holder with respect to the base can be set more accurately than before.

In the method of manufacturing the optical pickup of the disk device according to the second aspect, when the lens holder and the insulating member are integrally molded, the grip portion is formed around the lens holder and the insulating member.
It is possible to simplify a series of operations such as gripping, moving, and setting such as cutting work.

Since the optical pickup of the disk device according to the third aspect is manufactured by the method for manufacturing the optical pickup of the disk device according to the first aspect, it has the same effect as that of the first aspect.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In this embodiment, the constituent members of the assembled optical pickup are the same as the constituent members of the optical pickup shown in FIG. 3, and therefore, the same members are designated by the same reference numerals and the description thereof will be omitted.

In the method of manufacturing the optical pickup according to the present embodiment, first, as shown in FIG. 2, the lens holder 2 and the rectangular rod-shaped insulating member 6 having large end portions are connected to the first connecting portion 11.
And, the resin material is injection-molded so as to be connected by the two second connecting portions 12, 12 and is integrally formed. Thereby, the relative position and angle between the lens holder 2 and the insulating member 6 can be set with high accuracy. In addition, in this embodiment, since injection molding is performed using the upper mold and the lower mold that are vertically divided at the central portion, the parting line PL is formed as shown in FIG. 1 or 2.

The lens holder 2 is, as shown in FIG.
An annular main body 2b, a lens fitting portion 2c protruding forward from the front end of the main body 2b, and left and right side surfaces (left and right side surfaces in FIG. 2) of the main body 2b on the lens fitting portion 2c side are provided. 5 has the spring bonding portions 2d and 2d of FIG.
The insulating member 6 is provided behind the main body 2b of the lens holder 2 so that both ends thereof are arranged on the left and right. The above-mentioned first connecting portion 11 includes the front central portion 6a of the insulating member 6 and the main body 2
It connects with the rear end surface 2e of b.

The two second connecting portions 12 and 12 are formed in a C shape and an inverted C shape, respectively, and the second connecting portions 12 and 12 are bonded to the left side of the lens holder 2 by spring bonding. The portion 2d and the left end portion of the insulating member 6 are connected to each other, and the right spring bonding portion 2d of the lens holder 2 and the right end portion of the insulating member 6 are connected to each other. The second connecting portions 12 and 12 are formed around the lens holder 2 and the insulating member 6 and also serve as a grip portion.

Next, in the main body 2b of the lens holder 2,
A coil (not shown) is mounted, and the lens 1 is fitted in the lens fitting portion 2c of the lens holder 2. Furthermore, FIG.
As shown in FIG.
A plurality of spring members 5 are bonded and installed between d and the end surfaces of both ends of the insulating member 6. Also, this spring member 5
Serves also as a lead wire and is connected to the coil.

In this way, the lens holder 2 and the insulating member 6
And the integrated state, that is, the lens holder 2 and the insulating member 6
With the relative position and angle with respect to the lens holder 2 and the insulating member 6 being set with high accuracy, the spring member 5 is provided between the lens holder 2 and the insulating member 6.
Since the lens holder 2 is attached to the insulating member 6,
The position and angle of can be set with high accuracy.

Next, the first connecting portion 11 is cut from the rear end surface 2e of the lens holder 2 shown in FIG. 2 by a cutting method such as laser cutting, punching cutting (press cutting), and ultrasonic scalpel, and the insulating member 6 is cut. From the front center portion 6a to the first connecting portion 11
The second connecting portions 12 and 12 from the rear end surfaces 6b and 6b of both ends of the insulating member 6 and the second connecting portion 12 from the front end surfaces 2f and 2f of the spring bonding portions 2d and 2d of the lens holder 2. , 12 are cut to remove the first and second connecting portions 11, 12.

At this time, since the integrally molded product of the lens holder 2 and the insulating member 6 before cutting has the second connecting portions 12 and 12 which also serve as the gripping portions, the gripping and
A series of operations for moving and installing can be easily performed.

Further, as shown in FIG. 1, a magnetic body 3 such as a permanent magnet is mounted in an upright state at the center of the base 4. At the rear end of the base 4, two mounting parts 4a, 4a for mounting both ends of the insulating member 6 are formed side by side in advance.

Finally, after fixing the base 4 with a jig (not shown), the lens holder 2 and the insulating member 6 connected by the spring member 5 are set on the base 4, as shown in FIG. Then, the insulating member 6 is attached to the mounting portion 4a of the base 4.
Join and fix to.

At this time, since the position and the angle of the lens holder 2 with respect to the insulating member 6 are set with high accuracy, the position and the angle of the lens holder 2 and the lens 1 with respect to the base 4 are accurately set to a predetermined position and angle. can do. Therefore, after assembling the lens 1, the lens holder 2, the magnetic body 3, the base 4, the spring member 5, and the insulating member 6 as in the conventional case, the lens 1 is performed when the assembly is fixed to a frame (not shown) of the optical pickup. The complexity of adjusting the optical axis can be reduced.

Further, this makes it possible to perform the complicated work of setting the insulating member 6 on the base 4 and setting the lens holder 2 on the base 4 at once.

Then, together with the lens holder 2, the lens 1
Is supported by the spring member 5 with respect to the base 4, so that it can move relatively. Therefore, the spring member 5
By passing a control current through the coil of the lens holder 2 via the lens, tracking and focusing of the lens 1 can be performed.

In this embodiment, the lens 1, the lens holder 2, the magnetic body 3, the base 4, the spring member 5 and the insulating member 6 can be assembled as described above.
The complicated work of setting the insulating member 6 on the base 4 and setting the lens holder 2 on the base 4 can be performed at one time. Further, the second connecting portion 12 shown in FIG. 1, which is a gripping portion, can simplify a series of work such as gripping, moving, and installing, such as cutting work. Furthermore, the complexity of adjusting the optical axis of the lens 1 can be reduced. Therefore, it is possible to easily manufacture the optical pickup.

The rear end surface 2e of the lens holder 2 obtained by cutting the first connecting portion 11 shown in FIG. 2, the front central portion 6a of the insulating member 6, and the insulating member 6 obtained by cutting the second connecting portions 12 and 12 are shown.
Cut marks are formed on the rear end surfaces 6b, 6b of both ends of the and the front end surfaces 2f, 2f of the spring bonding portions 2d, 2d of the lens holder 2. This cutting trace is a state in which the parting line PL has been scraped off, like the cutting trace on the front end face of the spring bonding portion 2d of the lens holder 2 shown by the arrow A in FIG. Also, when the cutting is performed by laser cutting, the cutting trace shows a state of soreness or a state where resin is burned, as compared with other molding surfaces, and the cutting is punched (pressed). In the case of (cutting), the cutting trace shows a state of being slightly glossy and less glossy than other molding surfaces.

[0028]

According to the method of manufacturing the optical pickup of the disk device of the first aspect, the complicated work of setting the insulating member on the base and setting the lens holder on the base can be performed at one time. The number of steps can be reduced, and the cutting step of the lens holder and the insulating member, which has not been done conventionally, can be easily performed by laser cutting or the like. Further, since the position and angle of the lens holder with respect to the base can be set more accurately than before, after assembling the lens, the lens holder, the magnetic body, the base, the spring member, and the insulating member as before, It is possible to reduce the complexity of adjusting the optical axis of the lens when fixing the assembly to the frame of the optical pickup. Therefore, the manufacture of the optical pickup can be simplified.

According to the manufacturing method of the optical pickup of the disk device of the second aspect, in addition to the above effects, a series of operations such as gripping, moving, and setting such as cutting operation can be simplified. The manufacturing of the optical pickup can be further simplified.

The optical pickup of the disk device according to the third aspect has the same effect as that of the optical pickup manufacturing method of the disk device according to the first aspect.

[Brief description of drawings]

FIG. 1 is a diagram showing a method of manufacturing an optical pickup of a disc device of the present invention, showing a state before an integrally molded product of a lens holder and an insulating member, a spring member, and a base are assembled.

FIG. 2 is a diagram showing an integrally molded product of a lens holder and an insulating member, which are integrally molded in one step of a method of manufacturing an optical pickup of a disc device of the present invention.

FIG. 3 is a completed view showing an example of an optical pickup of a disk device.

FIG. 4 is a diagram showing a method of manufacturing an optical pickup of a conventional disk device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Lens 2 ... Lens holder 3 ... Magnetic body 4 ... Base 5 ... Spring member 6 ... Insulating member 12 ... 2nd connection part (holding part)

Claims (3)

[Claims] 1. A lens for tracking or focusing a light beam on a disk, a lens holder to which the lens is mounted and a coil is provided, and a magnetic body arranged corresponding to the coil of the lens holder. When,
A base to which the magnetic body is fixed, an insulating member attached to the base, and a lens holder provided between the insulating member and the lens holder, and movably supporting the lens holder with respect to the base, A method of manufacturing an optical pickup for a disk device, which comprises assembling a spring member also serving as a lead wire of the coil, wherein the lens holder and the insulating member are integrally molded, and the spring is provided between the lens holder and the insulating member. A method for manufacturing an optical pickup of a disc device, comprising: attaching a member, cutting the lens holder and the insulating member, and then attaching the insulating member to the base. 2. When integrally molding the lens holder and the insulating member, a grip portion is formed around the lens holder,
2. The method for manufacturing an optical pickup of a disk device according to claim 1, wherein the gripped portion is also cut off when the lens holder and the insulating member are cut. 3. An optical pickup for a disk device manufactured by the method for manufacturing an optical pickup for a disk device according to claim 1, wherein the lens holder and the insulating member are cut into the lens holder and the insulating member. An optical pickup for a disk device, which has a cut mark when it is cut.