JP2011086344A - Optical pickup - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical pickup that reliably locks a control board. <P>SOLUTION: In the optical pickup, a hook 9 is integrally provided in a protruding manner on a synthetic resin slide base 1 that reciprocates in a radial direction of an optical disk, a recess 15 on one end of the control board 7 is engaged with the hook 9, and the other end of the control board 7 is attached to the slide base 1 with a screw 10 so as to be immovable. Information recorded on the optical disk is read by irradiating the optical disk with laser light from a laser diode mounted on the slide base 1, and receiving the reflected light with a light receiving element for reading. A notch 20 allowing the hook 9 to pass therethrough communicates with the recess 15, which is formed on the one end of the control board 7. The recess 15 is engaged with the hook 9 by fitting the hook 9 to the notch 20, placing the control board 7 on a placing surface 1b of the slide base 1 and moving the control board 7 in a direction of an arrow A along the placing surface 1b. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to an optical pickup of a disk device such as a Blu-ray Disc recorder (or player), for example. In particular, the control board can be surely locked.

An example of an optical pickup is shown in the schematic diagram of FIG. 3, which is a Blu-ray.
A disc-type recorder (or player), wherein an engaging portion 1a projecting from a synthetic resin slide base 1 is slidably engaged with a guide rail 2, whereby the slide base 1 is optical disc (not shown). ), And a BD optical system 3 and a DVD-CD optical system 4 are provided on the slide base 1. The BD optical system 3 includes a BD laser diode BD. An LD, a diffraction grating GRT, a polarization beam splitter PBS, a collimator lens CL reciprocated by the spherical aberration correction mechanism 5, a reading light receiving element PD1, and the like. The DVD-CD optical system 4 is a DVD-CD laser diode DV.
A control board 7 having a D-CD / LD, a half mirror HM, a reading light receiving element PD2, and the like, provided with an objective lens OL driven by an actuator 6, and made of a printed wiring board.
Is mounted on the mounting surface 1b of the slide base 1, and each laser diode DVD-CD / LD, BD / LD and each reading light receiving element PD1, are connected to the control board 7 via a flexible flat cable (not shown). PD2 is connected.

The reading procedure of the BD optical system 3 will be described. A BD type optical disc in which the laser light a1 from the BD laser diode BD / LD is rotated at high speed through the diffraction grating GRT, the polarization beam splitter PBS, the collimator lens CL, and the objective lens OL. The reflected light b1 is received by the reading light receiving element PD1, and the information recorded on the BD type optical disk is read.

The reading procedure of the DVD-CD optical system 4 will be explained. Laser diode DV for DVD-CD
The laser light a2 is projected from the D-CD / LD through the half mirror HM and the objective lens OL onto the DVD-CD type optical disk rotating at high speed, and the reflected light b2 is read as the light receiving element PD2 for reading.
Is received and the information recorded on the DVD-CD type optical disk is read.

Conventionally, there is an optical pickup shown in the exploded perspective view of FIG. 4. A substantially L-shaped hook 9 is integrally projected at one end of the slide base 1, and a screw hole 11 for screwing a screw 10 is provided at the other end. A pair of positioning pins 12, 13 are integrally projected at the center of the slide base 1.

A recess 15 is formed at one end of the control board 7 so as to face the hook 9, and the screw hole 11.
A screw insertion hole 16 is provided in the other end of the control board 7 so as to face the center of the control board 7, and positioning holes 17 and 18 are provided in the center of the control board 7 so as to face the positioning pins 12 and 13.

The hook 9 includes a hook base portion 9a standing from the slide base 1 and the hook base portion 9a.
The hook tip 9b bends at right angles from the edge of the slide base 1 toward the center of the slide base 1, and the distance t1 between the hook tip 9b and the mounting surface 1b is slightly smaller than the thickness t2 of the control board 7. The horizontal width d1 of the hook 9 is set slightly smaller than the horizontal width d2 of the recess 15, and the vertical width h1 of the hook 9 is set larger than the vertical width h2 of the recess 15.

The procedure for mounting the control board 7 will be described. As shown in FIGS.
6 is obliquely held and one end thereof is pushed into the hook 9 to engage the recess 15 with the hook 9, and the other end of the control board 7 is lowered, as shown in FIGS. 6 (a) and 6 (b). The positioning holes 17 and 18 are fitted to the positioning pins 12 and 13, and the screw 10 is screwed into the screw hole 11 through the screw insertion hole 16, whereby the control board 7 is connected with the screw 10 and the hook 9. Both ends are locked to the slide base 1.

JP-A-9-320087

In the above conventional configuration, as shown in the enlarged view of FIG. 5B, when the control board 7 is gripped obliquely and one end thereof is pushed into the hook 9 side, the recess 15 of the control board 7 is inserted into the hook 9. Is not smoothly fitted, and the control board 7 hits the positioning pin 12, so that the hook tip 9b is pushed up by the control board 7, and the push-up force F is concentrated on the base of the hook base 9a. There is a possibility that the base of the hook base portion 9a may be broken. In this case, one end of the control board 7 is not sufficiently locked, and the control board 7 vibrates and generates unpleasant noise. There is also a possibility that the soldered portion of the flexible flat cable extending from the substrate 7 may be damaged.

An object of the present invention is to provide an optical pickup capable of reliably locking a control board in view of the above-described conventional drawbacks.

In order to achieve the above object, according to a first aspect of the present invention, a laser diode and a light-receiving element for reading are arranged on a synthetic resin slide base that can reciprocate along the radial direction of an optical disk. A recess formed on one end of a control board connected to the light receiving element via a flexible flat cable is engaged with a hook integrally projecting on the slide base, and the other end of the control board is fixed to the slide base with a screw. Thus, the control board is locked to the mounting surface of the slide base, the laser beam is projected from the laser diode onto the optical disc, and the reflected light is received by the light receiving element for reading, so that the information recorded on the optical disc In the optical pickup configured to read the notch, the notch having a size that allows passage of the hook is provided in the recess. It is formed on one end of the control board in communication, and the control board is placed on the placement surface of the slide base by aligning the notch with the hook, and the control board is moved along the placement surface, The concave portion is engaged with the hook.

According to a second aspect of the present invention, in the first aspect of the invention, a narrow groove that can be engaged with a positioning pin integrally projecting from the slide base is formed in the control board along the moving direction of the control board. The control board is mounted on the mounting surface of the slide base by aligning the notch with the hook, the narrow groove is engaged with the positioning pin, and the control board is moved with reference to the positioning pin. It is characterized by.

According to the first aspect of the present invention, the control board is mounted on the mounting surface of the slide base by aligning the notch portion of the control board with the hook of the slide base, and the control board is mounted along the mounting surface. By moving, the recess is engaged with the hook, and the control board is not brought into contact with the hook at the time of the engagement. With this, the both ends of the control board are securely locked, thereby preventing the control board from vibrating and generating unpleasant noise or preventing the accident where the flexible flat cable extending from the control board is damaged. be able to.

According to the second aspect of the present invention, by moving the control board with reference to the positioning pin, the recess of the control board can be easily and reliably engaged with the hook of the slide bay.

(A) is a disassembled perspective view which shows the optical pick-up which is one Embodiment of this invention, (b) is a top view of the principal part. (A) And (b) is a schematic plan view explaining the attachment procedure of the same control board. It is the schematic which shows an example of an optical pick-up. It is a disassembled perspective view which shows a prior art example. (A) is a schematic plan view explaining the front | former stage of the attachment procedure of the control board, (b) is the schematic rear view. (A) is a schematic plan view explaining the latter part of the attachment procedure of the control board, (b) is the schematic rear view.

1 and 2 show an optical pickup according to an embodiment of the present invention, which is for a Blu-ray Disc type recorder (or player), and is a notch that allows the hook 9 to pass therethrough. A portion 20 communicates with the recess 15 and is formed at one end of the control board 7, and narrow grooves 21 and 22 are formed in the control board 7 so as to face the positioning pins 12 and 13. Since the configuration other than the above is substantially the same as the configuration shown in FIGS. 3 and 4, the same parts are denoted by the same reference numerals and the description thereof is omitted.

The horizontal width d3 of the notch 20 is set slightly larger than the horizontal width d1 of the hook 9, the vertical width h3 of the notch 20 is set larger than the vertical width h2 of the recess 15, and the depth of the notch 20 The depth e2 from the end to the back end of the recess 15 is set to be the same as or slightly larger than the protruding length e1 of the hook tip 9b.

The narrow grooves 21 and 22 are formed along the moving direction A of the control board 7, and one of the narrow grooves 21 is formed.
Is opened at the front edge of the control board 7 and the other narrow groove 22 is formed in the center of the control board 7 in the shape of a long hole.

The procedure for attaching the control board 7 will be described. As shown in FIG.
By aligning 0 and placing the control board 7 on the placement surface 1b of the slide base 1, one narrow groove 21 is opposed to one positioning pin 12, and the other narrow groove 22 is placed on the other positioning pin 13. By engaging and moving the control board 7 in the direction of arrow A with reference to both positioning pins 12 and 13, the recess 15 is engaged with the hook 9 as shown in FIG.
When the screw 10 is screwed into the screw hole 11 through the screw insertion hole 16, the screw 10
Both ends of the control board 7 are locked to the slide base 1 with the hook 9.

According to the above configuration, the notch 20 of the control board 7 is aligned with the hook 9 of the slide base 1, and the control board 7 is placed on the placement surface 1b of the slide base 1, and along the placement surface 1b. The recess 15 is engaged with the hook 9 by moving the control board 7 in the direction of arrow A. Since the control board 7 is not brought into contact with the hook 9 during the engagement, the hook 9 The control board 7 is securely locked at both ends by the hook 9 and the screw 10 so that the control board 7 vibrates and generates unpleasant noise. 7
It is possible to reliably prevent an accident in which the soldered portion of the flexible flat cable extending from the side is damaged.

Further, by moving the control board 7 with reference to the positioning pins 12 and 13, the recess 15 of the control board 7 can be easily and reliably engaged with the hook 9 of the slide base 1.

DESCRIPTION OF SYMBOLS 1 Slide base 1b Mounting surface of a slide base 7 Control board 10 Screw 12, 13 Positioning pin 15 Recess 20 Notch part 21, 22 Narrow groove 2
BD / LD Laser diode for BD DVD-CD / LD Laser diode for DVD-CD PD1, PD2 Reading light receiving element d1 Hook width d3 Notch width h2 Notch height h3 Notch height e1 Hook tip Projection length e2 Depth from the back end of the notch to the back end of the recess

Claims (2)

A laser diode and a light receiving element for reading are arranged on a synthetic resin slide base that can reciprocate along the radial direction of the optical disk, and is connected to one end of a control board connected to the laser diode and the light receiving element for reading through a flexible flat cable. The formed recess is engaged with a hook integrally projecting on the slide base, and the other end of the control board is fixed to the slide base with a screw, so that the control board is locked to the mounting surface of the slide base. In the optical pickup that projects the laser beam from the laser diode onto the optical disc and receives the reflected light by the reading light receiving element to read the information recorded on the optical disc, it allows the hook to pass. A notch having a size communicates with the recess and is formed at one end of the control board. The control board is mounted on the mounting surface of the slide base with the notch portions aligned, and the concave portion is engaged with the hook by moving the control board along the mounting surface. Optical pickup. A narrow groove that can be engaged with a positioning pin integrally projecting on the slide base is formed in the control board along the moving direction of the control board, and the control board is placed on the slide base by aligning the notch with the hook. 2. The optical pickup according to claim 1, wherein the optical pickup is mounted on a surface, the narrow groove is engaged with a positioning pin, and the control board is moved with reference to the positioning pin.

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