JPH07192308A - Production of optical pickup parts and device therefor - Google Patents

Abstract

PURPOSE:To drastically improve the positional accuracy by positioning the cut optical parts at a specified position in a forming die and then forming the holder. CONSTITUTION:The cut optical part 7 from an automatic feeder is positioned on the ejector mechanism 3 of a lower die 1 by a holding core pin 4, the part 7 is vertically clamped by vacuum-suction mechanisms 5 and 6, the gas is exhausted from passages 5a and 6a, an optical path is secured by recesses 5b and 6b, and the part 7 is vacuum-sucked and held. An upper die 2 is then lowered to form a forming cavity between the lower die 1 and upper die 2, a molten resin 9 is poured into the cavity and filled in the space between the upper die 2 and suction mechanism 5, the recess 3a of the ejector mechanism 3, etc. The resin 9 is cooled for a specified time and solidified, then the vacuum suction by the mechanisms 5 and 6 is released, the upper die and the mechanism 6 are raised, and then the ejector mechanism 3 is raised to discharge the formed article.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manufacturing apparatus and a manufacturing method of an optical pickup component used for an optical pickup such as an optical recording / reproducing apparatus such as a CD player, an MD player, a CD-ROM or a magneto-optical recording / reproducing apparatus.

[0002]

2. Description of the Related Art To manufacture an optical pickup part in which optical parts such as a diffraction grating, a beam splitter, an objective lens or a detection lens used in an optical pickup of an optical recording / reproducing device or a magneto-optical recording / reproducing device are assembled in a holder. Conventionally, the process as shown in FIG. 5 has been performed.

That is, the holder 100 is molded by injection molding or the like as shown in FIG. 1A, and then a UV (ultraviolet) curing resin adhesive 101 is applied to the holder 100 as shown in FIG. After that, as shown in FIG. 3C, the cut optical component 102 is manually inserted into the holder 100 by metal tweezers or bamboo tweezers 103, and then ultraviolet rays are irradiated by the ultraviolet ray irradiator 104 to cure the adhesive. The optical component 102 is fixed to the holder 100.

[0004]

In the above-described conventional method for manufacturing an optical pickup component, the optical component is manually inserted into the holder and fixed with an adhesive, so that the number of manufacturing steps increases and many Because it requires human intervention,
When the adhesive leaks out or leaks out, the optical path is blocked and the performance deteriorates or an insertion error occurs.
It is difficult to deal with automation.

[0005]

In order to solve the above-mentioned problems, the first invention of the present application is an apparatus for manufacturing an optical pickup part in which an optical part is incorporated in a holder. The holding mechanism for the component is provided, and the holding mechanism is provided with a recess for securing the optical path of the optical component.

Further, in the second invention of the present application, the holder is molded after the cut optical component is held and positioned at a predetermined position in the molding die. It should be noted that the holder includes a flange, a lens barrel, a spring component, and the like.

[0007]

[Function] Since the cut optical component is held at a predetermined position in the molding die and positioned, the holder is molded.
A holder-independent molding process, insertion of an optical component into the holder, and a bonding process are not required, and the optical component can be integrated with the holder in a series of processes without human intervention.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, FIG. 1 is a diagram showing a state in which an optical component is set in a molding die in the manufacturing process of the method for manufacturing an optical pickup component according to the present invention, and FIG. 2 is a process in which a molten resin is injected into the mold. FIG. 3 is a view showing a state in which the molded product is ejected from the mold by the ejecting mechanism, and FIG. 4 is a sectional view of the completed product.

An optical pickup component manufacturing apparatus for carrying out the method of the present invention has a pair of upper and lower molds (fixed mold) 1 and an upper mold (movable mold) 2 in which a protrusion mechanism 3 is vertically arranged. The ejection mechanism 3 is movably arranged, and a positioning holding core pin 4 is provided on the upper surface of the ejection mechanism 3 and a holding recess 3a is formed. Then, rod-shaped vacuum suction mechanisms 5 and 6 as holding mechanisms are arranged in the ejection mechanism 3 of the lower mold 1 and in the upper mold 2.

Exhaust passages 5a and 6a are formed in the vacuum suction mechanisms 5 and 6 in the axial direction, and the optical paths of the optical component 7 are secured at the opposite ends of the vacuum suction mechanisms 5 and 6. Recesses 5b and 6b are formed.

To manufacture an optical pickup part in which the holder 8 is fixed to the optical part 7 by this manufacturing apparatus,
As shown in FIG. 3, the cut optical component 7 is positioned by the holding core pin 4 on the ejecting mechanism 3 of the lower die 1 by an automatic feeder (not shown), and the optical component 7 is attached by the vacuum suction mechanisms 5 and 6. The optical components 7 are vacuum-sucked and held while being sandwiched from the upper and lower sides, exhausted from the exhaust passages 5a and 6a, and the optical paths being secured by the recesses 5b and 6b.

After that, as shown in FIG. 2, the upper mold 2 is moved downward to form a molding cavity between the lower mold 1 and the upper mold 2, and the molten resin 9 is poured into the molding cavity to form the upper mold. 2 and the vacuum suction mechanism 5 and the recess 3a of the ejection mechanism 3
Etc. is filled with the molten resin 9, and the vacuum suction by the vacuum suction mechanisms 5 and 6 in which the resin 9 is solidified by cooling for a required time is released,
The upper die 2 and the vacuum suction mechanism 6 are moved upward, and then the ejection mechanism 3 is raised as shown in FIG. 3 to take out the molded product.

After that, by removing the molded product from the ejecting mechanism 3, a series of steps shown in FIG.
An optical pickup component in which the holder 8 is integrally attached to the optical component 7 as shown in FIG.

In the illustrated example, a vacuum suction mechanism is shown as a mechanism for holding the optical component 7, but a holding mechanism not based on vacuum suction may be used. However, in order to avoid contact with the lens and secure the optical path, it is necessary to provide the holding mechanism with a recess.

[0015]

As described above, according to the present invention,
Since the holder is molded after holding the cut optical component at a predetermined position in the molding die and positioning it, the holder-independent molding process, insertion of the optical component into the holder, and bonding process are not required. Since the optical components can be fixed to the holder in one process without human intervention, the positional accuracy can be greatly improved, and insertion errors and scratches on the optical components can be eliminated to improve quality and improve automation. Can be dealt with easily.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a manufacturing process of an optical pickup manufacturing method according to the present invention.

FIG. 2 is a view showing a state where molten resin is injected into a mold in the same manufacturing process.

FIG. 3 is a diagram showing a state in which a molded product is ejected from a mold by an ejection mechanism.

[Figure 4] Cross-section of the finished product

5A to 5D are views for explaining a conventional manufacturing process of an optical pickup component.

[Explanation of symbols]

1 ... Lower mold, 2 ... Upper mold, 3 ... Projection mechanism, 4 ... Holding core pin, 5, 6 ... Vacuum suction mechanism (holding mechanism), 5b, 6b
... recesses, 7 ... optical parts, 8 ... holders, 9 ... molten resin.

Claims (2)

[Claims] 1. A manufacturing apparatus for an optical pickup component in which an optical component is incorporated in a holder, the manufacturing apparatus includes a holding mechanism for the optical component in a mold for molding the holder, and the holding mechanism secures an optical path of the optical component. An apparatus for manufacturing an optical pickup component, which is provided with a concave portion for 2. A method of manufacturing an optical pickup component in which an optical component is incorporated in a holder, wherein the cut optical component is held and positioned at a predetermined position in a die for molding the holder, and then the optical component is placed in the die. A method of manufacturing an optical pickup component, which comprises injecting a molten resin to mold a holder.