JPH05282855A - Reading device for optical disk - Google Patents

Abstract

PURPOSE:To simplify a positioning operation and assembly on the occasion of fitting an optical lens to a main base by a leaf spring. CONSTITUTION:For the purpose of positioning and screwing a leaf spring 6 for filing an optical lens 5, the periphery of a leaf spring fixing part of a main base 4 is formed in a protuberant shape in dimensions allowing the leaf spring to be put in, and the leaf spring 6 is placed in a recession of the protuberant part. Accordingly, the movement of the leaf spring 6 is regulated by the protuberant part of the main base 4 and a thread hole of the main base and a through hole of the leaf spring are aligned naturally with each other. Since the holes aligned with each other are screwed up, the time for assembly can be reduced and the amount of assembly for a unit time is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk reader used as an auxiliary storage device of a computer.

[0002]

2. Description of the Related Art FIG. 3 and FIG.
It is a figure which shows the structure of a part of reading device of the conventional optical disc shown by 91822 gazette. In the figure,
Reference numeral 1 is a laser source for generating a laser beam incident on an optical disk surface (not shown), 2 is a reading beam emitted from the laser source 1, and 3 is an optical element for retracing a reflected beam in the middle of the reading optical path. A device 4 is a main base to which an optical device 3 is attached, a reference numeral 5 is an optical lens for narrowing parallel rays of a reading beam 2, and a laser beam emitted from the laser source 1 is turned into a parallel light. A leaf spring attached to the base 4 and a screw 7 for fixing the leaf spring 6 to the main base 4.

Next, the operation of the above conventional device will be described. The optical disk is a large-capacity, high-density storage device used in computers and the like similar to the conventional floppy disk and hard disk, and it is required to reduce the cost and increase the reliability year by year. Due to the dual use of parts, etc., it is required to reduce the quantity of parts and to have extremely strict prices. Particularly, in the optical disc reader currently used, when fixing the optical lens 5 to the main base 4, the leaf spring 6 is placed near the leaf spring mounting portion of the main base 4 and the screw of the main base 4 is visually observed. The hole and the through hole of the leaf spring 6 are aligned with each other, and the screw 7 is inserted and tightened in the matching hole to be fixed.

[0004]

In the conventional optical disc reading apparatus, the optical lens 5 is generally fixed to the main base 4 by the leaf spring 6, and sufficient consideration is given to the positioning and assembly of the screw 7 as the fixing means. Not done. Therefore, when the leaf spring 6 is fixed to the main base 4 with a plurality of screws, a plurality of screw tightening steps and a leaf spring positioning step are required, which consumes a great deal of work time and raises the price. It was

The present invention has been made to solve the above problems, and an object thereof is to reduce the positioning time for tightening the leaf spring and to simplify the assembly.

[0006]

According to the optical disc reading apparatus of the present invention, a leaf spring is provided around the leaf spring fixing portion on the main base side for positioning and screwing the leaf spring for fixing the optical lens. A raised shape or protrusion is provided so as not to rotate, and the leaf spring is placed on the raised shape or the valley of the protrusion.

[0007]

In the present invention, the positioning of the leaf spring when attaching the optical lens to the main base is performed by raising the periphery of the leaf spring attaching portion of the main base and placing the leaf spring in the valley portion. Since the movement of the leaf spring is restricted by the raised portion of the base, the screw hole of the main base and the through hole of the leaf spring are inevitably aligned with each other. Since the matched holes are screwed, the assembly time can be reduced and the assembly amount per unit time is improved.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an assembled perspective view of an optical disc reader according to an embodiment of the present invention, in which 1 is an optical disc surface.
A laser source for generating a laser beam incident on a laser beam (not shown), 2 is a reading beam emitted from the laser source 1, 3 is an optical device for retracing a reflected beam in the middle of the reading optical path, and 4 is an optical device. A main base 5 to which the device 3 is attached is an optical lens for narrowing the parallel rays of the reading beam and making the laser beam emitted from the laser source 1 into parallel light. 6 is a leaf spring for attaching the optical lens 5 to the main base 4. , 7 are screws for fixing the leaf spring 6 to the main base 4, and 8 is a leaf spring positioning wall provided on the main base 4.

Next, the operation of the above apparatus will be described.
In the leaf spring attaching step of the present embodiment, both ends of the leaf spring of the main base 4 are arranged in order to prevent the leaf spring 6 for fixing the optical lens 5 of the optical disc reading device from being positioned and displaced during screwing. A positioning wall 8 was provided on the periphery, and the leaf spring 8 was placed in the valley portion of the wall 8. That is,
By placing the leaf springs 6 between the positioning walls 8, the movement of both ends of the leaf springs 6 is restricted, and the screw holes of the main base 4 and the through holes of the leaf springs 6 are necessarily aligned. Since the screws are screwed through the matched holes, the assembling time can be reduced and the assembling amount per unit time is improved.

Although the raised wall is provided for positioning the main base of the leaf spring in the above-mentioned embodiment, it may be a projection-like wall, and its shape is not limited as long as it regulates the leaf spring in the left-right direction.

[0011]

As described above, in the optical disc reading apparatus of the present invention, the leaf spring for mounting the optical lens is arranged at the valley of the raised shape provided on the main base side. The movement of the leaf spring is restricted by the raised portion on the side, and the screw hole of the main base and the through hole of the leaf spring are necessarily aligned with each other. By assembling the matched holes with screws, the assembly time can be reduced and the assembly amount per unit time is improved.

[Brief description of drawings]

FIG. 1 is an assembled perspective view showing an optical disk reader according to an embodiment of the present invention.

FIG. 2 is a plan view in which a leaf spring is attached to a main base in the above embodiment.

FIG. 3 is an assembled perspective view showing a conventional optical disc reader.

FIG. 4 is a plan view in which a conventional leaf spring is attached to a main base.

[Explanation of symbols]

 1 laser source 2 reading beam 3 optical device 4 main base 5 optical lens 6 leaf spring 7 mounting screw 8 positioning wall

Claims (1)

[Claims] 1. A laser source for generating a laser beam incident on an optical disk surface, an optical device for retracing the reflected beam on at least a part of a reading optical path, and a main base on which the optical device is mounted. The leaf spring is installed in an optical disc reading device that includes an optical lens that narrows a reflected beam or collimates a laser beam emitted from a laser source, and fixes the optical lens by fixing it to a main base with a leaf spring. A device for reading an optical disc, characterized in that a wall portion or a protrusion portion for restricting the position of the leaf spring in the rotation direction is provided at both ends on the main base side.