JPH0610548Y2 - Optical pickup holding member - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an optical pickup holding member used for signal reading of a disc player, and uses an optical pickup used in a pinion rack drive system as a linear motor drive system. It was devised so that it could be done.

(Prior Art) Linear Motor Drive Type Optical Pickup Holding Member 1
As shown in a perspective view in FIG. 4, the pickup portion 2 is integrally incorporated into a pickup mounting body 3 made of synthetic resin or aluminum die casting so as not to be separated.

Although not shown in the drawing, the drive coil as the linear motor is attached to the pickup attaching body 3, and the fitting hole 4 is fitted into the reference shaft bridged to the chassis (not shown) to energize the drive coil in the fixed magnetic field. Then, the fitting hole is guided by the reference shaft, and the optical pickup holding member 1 performs a feed servo operation.

(Problems to be solved by the invention) When the pinion rack drive type disc player is modified to the linear motor drive type in order to improve the access performance, when the optical pickup holding member 1 is used, the drive part is greatly modified. Will be needed.

Further, since the pickup unit 2 is provided in the central portion of the thin pickup mounting body 2, there is a possibility that the pickup unit 2 may be displaced due to vibration or the like during use, resulting in an error in reading.

This device solves the above problems and has excellent mounting rigidity,
An object of the present invention is to propose an optical pickup holding member that can be easily modified to a linear motor drive system by using a common optical pickup of a pinion rack drive system.

(Means for Solving the Problem) In order to achieve the above object, the present invention provides a pickup mounting body to which a drive coil of a linear motor is to be mounted, the mounting portion having a front view mounting portion for bridging the left and right parts of an optical pickup. Fixing means for fixing the shaft fitted in the sliding hole formed in at least one of the left and right parts to one of the left and right corner recesses formed in the attachment part so as to be removable. And a mounting means that detachably mounts the other of the left and right parts to the other of the corner recesses.

(Operation) A shaft is fitted in the sliding hole of at least one of the left and right parts of the optical pickup, and the shaft is pressed by one of the left and right corner recesses of the mounting portion of the pickup mounting body by the fixing means.
When the other of the left and right portions is attached to the other of the corner recesses by the attaching means, the optical pickup is fixed to the pickup attaching body, and the linear motor drive type optical pickup is obtained.

As described above, it is possible to easily remodel the linear motor drive system by using the conventionally used optical pickup by the pickup mounting body and the fixing means and the mounting means.

Since the left and right parts of the optical pickup are bridged and fixed to the front view type mounting body of the pickup mounting body, the optical pickup and the mounting portion form a rectangular frame structure in the front view, increasing the rigidity and strong against vibration etc. , And has excellent reproduction characteristics without resonance.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an exploded perspective view, FIG. 2 shows a plan view, and FIG. 3 shows a front view.

A pickup mounting body 16 including a mounting portion 11 of a front view type and a coil mounting portion 14 to which the drive coil 13 of the linear motor 12 is mounted and a guide hole 15 is formed by a rigid body such as aluminum die casting or a hard synthetic resin. .

The left and right walls 17 and 18 constituting the mounting portion 11 are formed with recessed notches 19 and 20 at their tops, and two L-shaped corner recesses 21 and 22 in front view are formed at the tops, respectively. Corner recess 2
Female screws 23 and 24 are provided in the Nos. 1 and 22, respectively.

In the illustrated example of the optical pickup 25 that is usually used in the pinion rack drive system, a sliding hole 28 is provided in one of the left and right portions 26, and the other left and right portion 27 has a U-shaped groove in a sideways posture. 29 is formed, and holes 30 (not shown) for mounting a rack are formed on the back sides of the left and right portions 26.
Has been formed.

Therefore, a shaft 31 is fitted in the sliding hole 28, the shaft 31 is pressed against the left and right corner recesses 21 and 21, and the left and right parts 26 are fixed using fixing means 32 so that the left and right parts 26 can be removed. Then
The right and left portions 27 are attached to the right corner recesses 22, 22 by using attachment means 33 so that they can be removed.

The illustrated fixing means 32 has a structure in which the shaft 31 is brought into contact with the corner recesses 21 and 21, and the shaft 31 is pressed into contact with the corner recesses 21 and 21 by the head taper of the countersunk screw 34 screwed into the female screw 23. 33 is a shaft 35 fitted in the groove 29
Is pressed against the right-hand corner recesses 22, 22 by the head taper of the countersunk screw 36 screwed into the female screw 22.

In order to position the optical pickup 25 on the pickup mounting body 16, a knock pin 37 tightly fitted in the hole 30 is provided.
It is provided upright in the recessed portion 19.

The right and left portions 27 on the right side of the optical pickup 25 may be provided with sliding holes similar to those on the right side, although not shown, in addition to the concave groove 29 in the illustrated example, or the U-shaped groove 29,
Alternatively, there is an optical pickup in which the right and left portions on the right side are simply formed in the shape of a plate without any sliding hole, so the mounting means used on the right side is not limited to the example shown in the above, but the corner recess 2 using a plate and a screw. , 22, the left and right parts can be bridged and fixed, and various structures can be made.

The fixing means used on the left side is, in addition to the plate screw 34 in the illustrated example,
Various materials such as a structure in which the shaft 31 is pressed by a screw screwed into the internal thread 23 can be used for the wedge body.

To the mounting portion 11 of the pickup mounting body 16 in a front view,
When the left and right parts 26 and 27 of the pickup 25 are bridged and fixed, the optical pickup 25 and the mounting portion 11 form a rectangular frame in a front view, the rigidity is increased, and the vibration resistance is excellent.

The pickup mounting body 16 configured as described above is connected to the guide rod 40 bridged to the shaft mounting portions 39, 39 at the lower left portion of the chassis 38 shown by the chain double-dashed line in each figure, and the guide hole 15
2 is loosely fitted, and the roller 43 pivotally supported by the left and right portions 27 is also brought into rolling contact with the guide rod 42 bridged to the shaft mounting portions 41, 41 at the lower right portion, so that the chassis 38 is vertically moved in the vertical direction of FIG. The pickup mounting body 16 is fed and servo-operated by the linear motor 12.

The center yoke 44 and the side yokes 45 and 46 of the linear motor 12 are attached to the lower surface of the chassis 38.

Reference numeral 47 is a sensor coil mounted on the pickup mounting body 16 for detecting the feed speed, and reference numeral 48 is a center yoke mounted on the chassis 38, and 49 and 50.
Is the side yoke.

(Effect of the Invention) As described above, the optical pickup holding member according to the present invention bridges the left and right parts of the conventionally used pinion rack drive type optical pickup to the front view type mounting portion of the pickup mounting body. , The shaft fitted in the sliding hole is pressed into the corner recess of the mounting part by the fixing means, and the other of the left and right parts is mounted in the corner recess of the mounting part using the mounting means, so that the linear motor drive system can be easily modified. it can.

Since the left and right parts of the optical pickup are bridged and fixed to the front view type mounting part of the pickup mounting body, the optical pickup and the mounting part form a rectangular frame in the front view, the rigidity is remarkably increased, and the vibration resistance is improved. Has improved.

The weight of the pickup mounting body reasonably increases the self-weight of the optical pickup as described above to prevent resonance development during reproduction, and the reproduction characteristics are significantly improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of essential parts in an embodiment of the present invention,
2 is a plan view of FIG. 1, FIG. 3 is a front view of FIG. 2, and FIG. 4 is a perspective view of essential parts of a conventional optical pickup holding member. 11 ... Mounting part, 12 ... Linear motor, 13 ... Drive coil, 14 ... Coil mounting part, 15 ... Guide hole, 1
6 ... Pickup mount, 17, 18 ... Left and right walls, 1
9,20 ... recessed portion, 21,22 ... corner recessed portion, 23,2
4 ... Female screw, 25 ... Optical pickup, 26, 27 ...
… Left and right part, 28 …… Sliding hole, 29 …… U-shaped groove, 30 ……
Hole, 31, 35 ... Shaft, 32 ... Fixing means, 33 ... Mounting means, 34, 36 ... Plate screw, 37 ... Dowel pin,
38 ... Chassis, 39, 41 ... Shaft mounting part, 40, 4
2 ... Guide rod, 43 ... Roller, 44, 48 ... Center yoke, 45, 46, 49, 50 ... Side yoke,
47 ... Sensor coil.

Claims (1)

[Scope of utility model registration request] 1. A pickup mounting body to which a drive coil of a linear motor is to be mounted, and a sliding member formed on at least one of the left and right parts, the mounting part having a front view mounting part for bridging the left and right parts of the optical pickup. Fixing means for fixing the shaft fitted in the hole to one of the left and right corner recesses formed in the mounting portion so as to be removable, and the other part of the left and right parts of the other of the corner recesses. An optical pickup holding member, characterized in that the optical pickup holding member has an attaching means detachably attached to an object.