JPH0632204B2 - Recording / playback device - Google Patents

Description

TECHNICAL FIELD The present invention relates to a recording / reproducing apparatus such as a disc player,
In particular, it is provided with a guide shaft that is attached to a chassis to guide the optical head slidably, and a motor substrate that is attached to the chassis with a screw and provided with a drive shaft of a turntable, and guides along the guide shaft. The present invention relates to a recording / reproducing apparatus capable of adjusting the position of the motor substrate so that the drive shaft is located on the extension line of the guide line of the reading section of the optical head.

(Prior Art) FIG. 3 is a plan view of a conventional recording / reproducing apparatus of this type. In the conventional recording / reproducing apparatus shown in FIG. 3,
Reference numeral 102 is a chassis. 104, ... is this chassis 102
, 106 is a guide shaft attached to each guide shaft attaching portion 104, ..., 108 is an optical head slidably fitted on each guide shaft 106, and 110 is an optical head of this optical head 108. The objective lens is formed in the central part and moves along a guideline A shown in the drawing as the optical head 108 slides. Reference numeral 112 denotes a fulcrum hole 114 located on the extension line of the guideline A of the objective lens 110.
And a pair of position adjusting / moving direction restricting slots 116 and 118 facing each other with the guideline A interposed therebetween, the motor board having an equilateral triangle in plan view, 120 is the motor board 1
It is a turntable attached to a rotating shaft of a motor (not shown) fixed to 12.

The motor board 112 has a fulcrum hole 114 with a rotation center positioning screw.
122 is inserted, and is rotatable about the fulcrum hole 114 in the directions of arrows B and C, respectively.

In the recording / reproducing apparatus having the above structure, the optical head 108 is attached to the disc mounted on the turntable 120.
When recording / reproducing necessary information through the objective lens 110 of the above, the motor is driven to rotate the motor shaft (turntable driving shaft) to rotate the turntable 120.
While rotating, the optical head 108 is guided along the guide shaft 106.

Then, in this case, in order to accurately perform servo tracking of the optical head 108 with respect to the disk, the optical head 10
It is necessary that the eight objective lenses 110 match the guideline A and the rotation center portion 121 of the turntable 120.

For that purpose, in this recording / reproducing apparatus, it is necessary to perform an adjusting operation to position the rotation center portion 121 of the turntable 120 on the extension line of the guideline A before driving the optical head 108.

To adjust the position, first, the elongated holes 116, 1 of the motor board 112
Position adjustment / movement direction regulating screws 124, 12 inserted in 18
Loosen 6 to the temporarily fixed state and set the motor board 1
When 12 is rotated in the direction of arrow B or C around the rotation center positioning screw 122 inserted into the fulcrum hole 114, and the rotation center 121 of the turntable 120 is located on the extension line of the guideline A. The motor substrate 112 is fixed to the chassis 102 by tightening the position adjusting / moving direction regulating screws 124 and 126.

However, in the conventional recording / reproducing apparatus having such a position adjusting structure, after the turntable center portion 121 of the motor substrate 112 is aligned with the extension line of the guideline A, the position adjusting / moving direction regulating screws 124 and 126 are tightened. However, the central portion 121 may be out of the extension line of the guideline A depending on how the tightening force is applied. In this case, the position adjusting / moving direction regulating screws 124 and 126 are loosened again, and the motor board 112 is slightly rotated about the fulcrum hole 114, and then the screws 124 and 12 are again rotated.
Tightening 6 is a troublesome and time-consuming task.

(Object of the Invention) The present invention has been made in view of the above problems, and an object of the present invention is to provide a recording / reproducing apparatus in which position adjustment work of a motor substrate is easy and can be performed in a short time. And

(Structure of Invention) In order to achieve such an object, the claims (1) of the present invention
In the above, there is provided a guide shaft which is attached to the chassis and slidably guides the optical head; In a recording / reproducing apparatus capable of adjusting the position of the motor board so that the drive shaft is located on the extension line of the guide line of the reading section of the optical head, the movement direction is restricted to one of the motor board or chassis. A slot is formed such that the screw is inserted and the longitudinal direction thereof is orthogonal or substantially orthogonal to the guide direction of the reading unit, and a position adjusting screw for adjusting the position of the motor board in the longitudinal direction is provided. When adjusting the position of the motor board with the position adjusting screw, After moving the longitudinal direction of the elongated hole while regulating the moving direction with the moving direction regulating screw inserted in the hole, and after adjusting the position of the motor board, tighten the moving direction regulating screw to the chassis. It is characterized in that the motor board can be positioned.

In the above structure, the optical head is slidably attached to the guide shaft attached to the chassis. On the other hand, a movement direction regulating screw provided on the other side is inserted into an elongated hole formed on one side of the motor substrate or the chassis, and the motor substrate is attached to the chassis via the movement direction regulating screw. Then, the position of the motor board is adjusted by the position adjusting screw so that the drive shaft of the turntable is positioned on the extension line in the guide line direction of the reading unit of the optical head guided along the guide shaft.

In this case, since the longitudinal direction of the elongated hole is orthogonal or substantially orthogonal to the extension line, when adjusting the position of the motor board with the position adjusting screw, the motor board is positioned in the longitudinal direction of the elongated hole. Will be adjusted. Then, when the center portion of the turntable is aligned with the extension line of the guide line of the reading portion of the optical head, the motor board is positioned and attached to the chassis by tightening the position regulating screw.

Therefore, in the present invention, since the position adjustment screw moves the motor board in a direction orthogonal or substantially orthogonal to the extension line of the guideline to adjust the position, even if the movement direction regulation screw is loose, the position adjustment screw The motor board whose position has been adjusted in step will not be displaced from the adjusted position.

Further, since the position can be adjusted without directly touching the motor board, the position can be adjusted very easily.

In claim (2) of the present invention, the position adjusting screw in the recording and reproducing apparatus according to claim (1) is configured to move in the longitudinal direction of the elongated hole when it is rotated. It is characterized by that.

According to this claim (2), since the position adjusting direction of the position adjusting screw and the position adjusting direction of the motor board coincide with each other, the position adjusting becomes easier.

According to claim (3) of the present invention, in the recording / reproducing apparatus according to claim (1), an urging means for urging the motor board against the chassis is provided, and the motor board is provided by the urging means. Is biased to the chassis to prevent the motor substrate from changing its position with respect to the chassis while the screw tightening force is small.

According to this claim (3), since the motor board is always biased toward the chassis, the motor board will not be displaced from the chassis even if the movement direction regulating screw is loose. In this case, even in the structure of claim (1), the position adjustment screw does not cause the displacement of the motor substrate, but the biasing means can further effectively prevent the displacement.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings. FIG. 1 is a plan view of a recording / reproducing apparatus according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of the recording / reproducing apparatus. In these drawings, the chassis 2 includes three screw mounting bosses 4 each having a threaded portion, a nut plate guide hole 6, a screw head engaging hole 8, and a screw hole 10 for mounting a mounting screw. Each is formed and the guide shaft mounting part
Twelve are provided.

The pair of guide shafts 14 are attached to the guide shaft attachment portions 12, respectively. An optical head 16 with an objective lens 18 as a reading unit is slidably fitted on a guide shaft 14. The motor board 20 is a screw mounting boss.
The elongated hole for inserting the movement direction regulating screw so that the movement direction regulating screw 30 which is attached to 4 can be inserted and the longitudinal direction thereof is orthogonal or substantially orthogonal to the guide direction of the objective lens 18.
22 and has a nut plate engaging hole 24, and
A rotation motor 28 for the turntable 26 is attached. The rotation center portion 27 of the turntable 26 is fixed to the rotation shaft of the motor 28. The movement direction regulating screws 30 are inserted into the elongated holes 22 of the motor board 20, respectively.
A spring washer 32 and a flat washer 34 are inserted into each movement direction regulating screw 30. The spring washer 32 is the urging means referred to in claim (3).

An upper end side of the nut plate 36 is immovably fitted into the nut plate engaging hole 24 of the motor board 20, and a lower end side thereof is movably inserted into the nut plate guide hole 6 of the chassis 2. That is, when the lower end side of the nut plate 36 moves along the inner wall of the nut plate guide hole 6 while restricting its movement (rotation) direction, the motor board 20 into which the upper end side of the nut plate 36 is fitted together with the nut plate 36. It will move in that direction. The screw retainer 38 is fixed to the chassis 2 by inserting a mounting screw 44 into an insertion hole 40 formed therein and inserting the mounting screw 44 into the screw mounting hole 10 of the chassis 2.

The position adjusting screw 46 is inserted into the recess 42 formed at the lower end of the screw retainer 38, and is also inserted into the screw hole 37 of the nut plate 36. The head 48 of the position adjusting screw 46 is immovably fitted in the screw head engaging hole 8 of the chassis 2 in the directions of arrows F and G, and the driver 52 is inserted into the hexagonal hole 50 formed in the head 48. It is supposed to be done.

In adjusting the position of the motor substrate 20, first, the positional deviation of the rotation center portion 27 of the turntable 26 with respect to the guideline A of the objective lens 18 of the optical head 16 is measured. If the result of the measurement shows that it is misaligned, the movement direction regulating screw
Turn 30 to loosen it. In this case, the spring washer
Since the motor board 26 is biased toward the screw mounting boss 4 side of the chassis 2 by 32, the motor board 20 is not displaced from the measured position.

Then, in this state, the driver 52 is inserted into the hole 50 formed in the head 48 of the position adjusting screw 46, and the driver 52 is rotated in the direction of arrow D or E in the figure. Then, the nut plate 36 is moved in the arrow F or G direction in the figure.

The nut plate 36 moves in the movement direction while being guided by the nut plate guide hole 6 with the rotation of the position adjusting screw 46. In this case, the upper end of the nut plate 36 is fitted into the nut plate engaging hole 24. Therefore, the motor board 20 is moved in the moving direction. When the rotation center portion 27 of the turntable 26 is positioned on the extension line of the guideline A of the objective lens 18 during this movement, the movement of the position adjusting screw 46 is stopped and the movement direction regulating screw 30 is set. tighten. In this case, since the motor washer 20 is always biased by the spring washer 32 toward the screw mounting boss 4 of the chassis 2, the movement direction regulating screw 30
The motor board 20 will not be displaced even when tightened.

Therefore, in this embodiment, the position adjustment screw 46 moves the motor substrate 20 in a direction orthogonal or substantially orthogonal to the extension line of the guideline A to adjust the position, and therefore the movement direction regulating screw 46 is loose. Well, position adjustment screw
The motor board 20 will not be displaced from the adjusted position because the 46 does not shift from the adjusted position. Further, since the position adjustment can be performed only by rotating the position adjustment screw 46 without directly touching the motor board 20, the position adjustment becomes very easy.

Further, since the position adjusting screw 46 is configured such that the motor substrate 20 moves in the longitudinal direction of the slot 22 when it is rotated, the position adjusting direction by the rotation of the position adjusting screw 46 and the motor substrate 20. Since the position adjustment directions of the above-mentioned items coincide with each other, the position adjustment becomes easier.

Furthermore, the motor board 20 is attached to the screw mounting boss 4 of the chassis 2.
Since the spring washer 32 that biases the motor substrate 20 is provided on the screw mounting boss 4, the spring washer 32 biases the motor substrate 20 toward the screw mounting boss 4 so that the position of the motor substrate 20 while the tightening force of the movement direction regulating screw 30 is small. The change can be effectively prevented.

Although the slot 22 is formed in the motor board 20 in the above embodiment, the slot 22 is formed in the chassis 2,
Even if the movement direction regulating screw 30 is inserted into the elongated hole 22 of the chassis 2, the same effect as the above embodiment can be obtained.

(Effect of the invention) As described above, according to claim (1) of the present invention, the position is adjusted by moving the motor board in the direction orthogonal or substantially orthogonal to the extension line of the guideline with the position adjusting screw. Therefore, even if the movement direction regulating screw is loose, the motor substrate adjusted in position by the position adjusting screw will not be displaced from the adjusted position. Further, since the position can be adjusted without directly touching the motor board, the position can be adjusted very easily.

In claim (2) of the present invention, the position adjusting screw,
Since it is configured to move in the longitudinal direction of the elongated hole when it is rotated, the position adjusting direction of the position adjusting screw and the position adjusting direction of the motor board coincide with each other. Will be even easier.

In claim (3) of the present invention, further provided with a biasing means for pressing the motor substrate to the chassis,
By biasing the motor board toward the chassis by the biasing means, it is possible to prevent the motor board from changing its position with respect to the chassis while the tightening force of the movement direction regulating screw is small. By being biased to the chassis side, it is possible to more effectively prevent the motor board from being displaced from the chassis even if the movement direction regulating screw is loose.

As described above, according to the present invention, it is possible to provide a recording / reproducing apparatus capable of easily performing the position adjustment work of the motor substrate in a short time.

[Brief description of drawings]

1 and 2 relate to an embodiment of the present invention. FIG. 1 is a plan view of the embodiment, and FIG. 2 is an exploded perspective view of the embodiment. FIG. 3 is a plan view of a conventional recording / reproducing apparatus. 2 ... Chassis, 12 ... Guide shaft mounting part, 14 ... Guide shaft, 16 ... Optical head, 18 ... Objective lens (reading part), 26 ... Turntable, 20 ... Motor board, 30 ... Moving direction regulating screw, 32 ... Spring Washer (biasing means),
46… positioning screw.

Claims (3)

[Claims] 1. A guide shaft mounted on a chassis for slidably guiding an optical head, and a motor substrate mounted on the chassis and provided with a drive shaft for a turntable, the guide shaft extending along the guide shaft. In a recording / reproducing apparatus capable of adjusting the position of the motor board so that the drive shaft is located on the extension line of the guide line of the reading section of the optical head, the movement direction is restricted to one of the motor board or the chassis. A slot is formed such that the screw is inserted and the longitudinal direction thereof is orthogonal or substantially orthogonal to the guide direction of the reading unit, and a position adjusting screw for adjusting the position of the motor board in the longitudinal direction is provided. When adjusting the position of the motor board with the position adjusting screw, place the motor board in the slot. After moving the longitudinal direction of the elongated hole while regulating the moving direction with the moving direction regulating screw passed through and adjusting the position of the motor board, the moving direction regulating screw is tightened to attach the motor to the chassis. A recording / reproducing device characterized by enabling positioning of a substrate. 2. The recording / reproducing apparatus according to claim 1, wherein the position adjusting screw is configured to move in a longitudinal direction of the slot when the position adjusting screw is rotationally operated. Recording / playback device. 3. The recording / reproducing apparatus according to claim 1, wherein an urging means for urging the motor board toward the chassis side is provided, and the motor board is attached to the chassis side by the urging means. A recording / reproducing apparatus capable of preventing a position change of the motor substrate with respect to the chassis while the tightening force of the screw is small by urging.