JPH0515164U - Pickup drive unit for disk player - Google Patents

Abstract

(57) [Abstract] [Purpose] In a guide shaft fixing structure for a pickup of a disc player, the shaft is easily fixed to a pickup chassis without causing play. [Structure] A resin holder is inserted into both ends of a guide shaft, and the holder is slid so as to fit a chassis into a guide groove of the holder, and the shaft is fixed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a pickup driving unit in a disc player for reproducing compact discs, laser discs, etc., and more particularly to a fixing structure of a guide shaft for guiding the pickup in a linear movement type.

[0002]

[Prior Art]

 Conventionally, two guide shafts for guiding the movement of this kind of pickup are arranged side by side, and as shown in FIG. 4, the guide shaft (2) is fixed to the chassis (3) at both ends of the shaft (2). Each of them is fitted into the groove (11) of the chassis (3) and the pressing plate (12) is tightened with screws (13) from above, or as shown in FIG. 5, the chassis (3) is molded with resin ( There was one that fixed the guide shaft by outsert molding via 14).

[0003]

[Problems to be solved by the device]

 However, the above-mentioned conventional technique has a problem that the working time spent for fixing becomes long. Also, if the screws are not completely tightened, the guide shaft may rattle up and down, and if it is tightened too much, the resin part may be damaged. For this reason, strict torque control of the driver tightening the screw was also required. Further, in the case of outsert molding, there is also a problem that it is difficult to ensure dimensional accuracy due to distortion of flatness due to molding pressure.

The present invention solves the above-mentioned problems, and can shorten the working time for fixing and prevent the play of the guide shaft, thereby improving the quality of the drive unit of the disc player. The purpose is to provide.

[0005]

Means for Solving the Problems In order to achieve the above object, the present invention is a pickup drive unit of a disc player for linearly moving on two guide shafts arranged in parallel to read a signal. , The guide shaft is inserted into the opening provided in the resin holder, the holder is inserted into the recess provided in the chassis, the locking pieces of the holder are engaged with the chassis opening, and both ends of the guide shaft are The guide shaft is fixed by being brought into contact with a restraining portion provided in the chassis recess.

[0006]

【Example】

 An embodiment of a drive unit of a disc player according to the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic structure of a drive unit of a disc player according to this embodiment, and FIGS. 2 and 3 show a portion for fixing a guide shaft.

In these figures, a pickup (1) for reading a signal from a rotating disk (4) mounted on a turntable (5) fixed to a drive shaft of a disk drive motor provided on a chassis (3) ) Is linearly supported on two guide shafts (2) (2) arranged in parallel. The guide shafts (2) (2) are provided on the chassis (3). The fixing structure is a feature of the present invention, and its details will be described later. A pickup driving motor (6), a worm gear (7) for transmitting the driving force of the pickup driving motor (6), a pinion member (8), a rack member (9), etc. are arranged on the chassis (3). Has been done. The pickup (1) is attached to the rack member (9).

In the above structure, the rotational driving force of the pickup driving motor (6) is transmitted as a linear driving force to the rack member (9) via the worm gear (7) and the pinion member (8), and the pickup ( 1) is moved on the guide shafts (2) and (2) in the front-back direction (vertical direction in the figure) by the driving force, and the optical signal of the disc (4) is read by the pickup (1).

Next, a fixing structure of the guide shafts (2) and (2) will be described with reference to FIGS. 2 and 3. Both ends of the guide shaft (2) (2) are inserted into the openings of the holder (10), and both ends of the guide shaft (2) (2) are penetrated. Next, the holder (10) is slid toward the end portions of the guide shafts (2) and (2) so that the chassis (3) plate thickness fits into the guide groove (10a) of the holder (10). , The fitting piece (10b) of the holder (10) is fitted into the recessed portion (3a) provided in the chassis (3), and the locking piece (10b) of the holder (10) is fitted into the square hole (3b) of the chassis (3). ).

That is, when the holder (10) having the guide shafts (2) and (2) inserted therethrough is fitted into the recess (3a) of the chassis (3), the locking piece (3b) is inserted into the holder (10). ) Wrap around under the chassis (3) due to the elasticity of), and when the holder (10) is completely inserted into the chassis (3), the above-mentioned elastic return causes the locking piece (10b) to move to the chassis (3). The guide shafts (2) and (2) are fitted in the square holes (3b), and further, the restraining portions (3c) provided in the concave portions (3a) of the chassis (3) fix the both end positions of the guide shafts (2) and (2). The shafts (2) and (2) are fixed so as to prevent vertical and lateral play. Therefore, the torque management of the screw-tightening driver is not required and the maintenance becomes easy.

[0011]

[Effect of the device]

 As described above, according to the present invention, the resin holder is inserted into both ends of the guide shaft, and the guide shaft is fixed by fitting the chassis in the guide groove of the holder. Compared with the case of tightening with screws, it is possible to prevent backlash and reduce the working time. In addition, the torque management of the screw tightening driver, which is required in the past, is not required, so maintenance is good and the quality is stable.

[Brief description of drawings]

FIG. 1 is a plan view of a drive unit of a disc player according to this embodiment.

FIG. 2 is a perspective view of a fixed portion of the guide shaft according to the present embodiment.

FIG. 3 is a side view of a fixed portion of the guide shaft.

FIG. 4 is a perspective view of a conventional guide shaft fixing portion using a pressing plate.

FIG. 5 is a schematic view of a conventional guide shaft fixing portion formed by outsert molding.

[Explanation of symbols]

 (1) Pickup (2) Guide shaft (3) Chassis (3a) Recess (3b) Square hole (3c) Restraint (10) Holder (10a) Guide groove (10b) Locking piece

Claims (1)

[Scope of utility model registration request] 1. In a pickup drive unit of a disc player for linearly moving on two guide shafts arranged in parallel to read a signal, the guide shaft is inserted into an opening provided in a resin holder, and a chassis is provided. The holder is inserted into the recess provided in the holder, the locking piece of the holder is engaged with the chassis opening, and both ends of the guide shaft are brought into contact with the restraining portion provided in the chassis recess to fix the guide shaft. A pickup drive unit for a disc player, which is characterized in that