JPH0520601A - Pickup moving device - Google Patents

Abstract

(57) [Summary] [Structure] The linear guide rails 14, 15 with the rope 44
And the pulley 41 along the circular guide rail 17.
42, 43 and the like, and by driving the rope 44 by the motor 36, the pickup is supported and the rope 4
The moving member 20 fixed in the middle of the line of 4 is moved from the guide rail 14 to the guide rail 17 via the pulley 41. [Effect] With a simple configuration, the pickup can be smoothly moved over both sides of the disc. Further, the movement of the moving member 20 from the guide rails 14 to 15 can be performed stably.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pickup moving device for reading recorded information on both surfaces of a disc such as a record such as a double-sided record player of a so-called vertical type linear tracking system.

[0002]

2. Description of the Related Art Conventionally, a cartridge is individually provided corresponding to one side of a record board, so-called A side, and the other side, B side, and double-sided performance is possible with the record board mounted. It is configured to be possible.

In addition, a cartridge for contacting one surface of a record board is mounted on a lid defining a record storage space.

[0004]

In such a prior art, a cartridge having a precise structure is used as described above.
It requires individual pieces and is therefore complicated in configuration.

Further, since the cartridge is mounted on the lid, the lid opening / closing device has a complicated structure so that the cartridge can be played smoothly without an undesired external force. Therefore, the prior art is
Inferior in cost reduction.

An object of the present invention is to simplify the structure, to reduce the cost, and as a means for moving the pickup, to arrange a linear traction member along the movement path of the pickup. Accordingly, it is an object of the present invention to provide a pickup moving device capable of moving a single pickup over both sides of a disc with a simple structure.

Further, an object of the present invention is to realize stable movement of the moving member by guiding the moving member with the disc-shaped guide member when the moving member moves from one side to the other side of the linear guide member. Especially.

[0008]

In order to solve the above-mentioned problems, the present invention provides a moving member supporting a pickup, and the pickup so that the pickup can move in the radial direction of the disk along both surfaces of the disk. A pair of parallel linear guide members for guiding the moving member, a linear pulling member fixed to the moving member in the middle of the track, a driving means for driving the pulling member, and a linear guide means. One for guiding the moving member from the other to the other, the central axis of which is parallel to the disk surface, and the center of rotation thereof is arranged so as to be parallel to the guiding direction of the linear guide means.
A disk-shaped guide means for guiding the traction member on its peripheral surface,
A loop is formed by stretching the pulling member between a linear guide position along the pair of linear guide means and an arcuate guide position continuously guided by the peripheral surface of the disc-shaped guide means. And a traction member stretching means for shaping.

[0009]

When the drive means is driven, the pulling member is driven from the linear guide position along the linear guide means and subsequently along the arcuate guide position guided by the peripheral surface of the disc-shaped guide means. While being pulled by the pulling member, the linear guide means moves from one linear guide means to the other linear guide means while being guided by the disc-shaped guide means. Therefore, the pickup can be stably moved over both surfaces of the disc.

[0010]

1 is a front view of an embodiment of the present invention, and FIG. 2 is a horizontal sectional view thereof. The record board 1 is fixed to a record board receiving portion 3 provided upright on the turntable 2 by a spring force by a crimping member 4.

FIG. 3 is an enlarged sectional view of the vicinity of the record board receiving portion 3 and the crimping member 4. The outer diameters of the record board receiving portion 3 and the pressure-bonding member 4 are such that when the reproduction needle 6 of the cartridge 5 reaches the radially innermost groove of the record board 1 after the performance of the record, the cartridge 5 receives the record board support. It is formed small so as not to hit the portion 3 and the crimping member 4. The record board receiving portion 3 and the crimping member 4
In order to hold the record board 1 so as not to vibrate during reproduction, it is desirable that their outer diameters be as large as possible, but as described above, it is selected in such a range as not to hit the cartridge 5 at the end of the record performance.

The turntable 2 has an endless belt 7
Is wrapped around. The belt 7 is wound around a pulley 9 fixed to a motor 8. In this way, the motor 8 rotationally drives the turntable 2 and the record board 1 around the horizontal axis. Instead of the drive system using the belt 7, a direct drive system in which a motor is directly connected to the turntable 2 may be used, or a rim drive system in which the output shaft of the motor is pressed against the periphery of the turntable to drive the turntable 2 to rotate. It may be. The cover 10 is
It is attached to the main body 11 on the right side of FIGS. 1 and 2 so as to be openable and closable around the vertical axis. The record board 1 can be placed and stored in the record board receiving member 12 provided inside the cover 10. The crimping piece 60 is interposed between the crimping member 4 and the cover 10.

A cartridge traveling device 13 according to the present invention is provided for traveling the cartridge 5 to play both surfaces of the record board 1. The guide rail 14 for playing one surface of the record board 1, for example, side A, and the guide rail 15 for playing the other surface of the record board 1, for example, side B, are used for the record board 1 mounted on the turntable 2. It is parallel to both surfaces and is supported by the chassis 16 above the record board 1. Guide rail 1
The ends of 4, 15 (straight guide means) are connected by a semi-circular guide rail 17 that surrounds the periphery of the record board 1. The cartridge 5 is fixed to the free end of the arm 18, and the base end of the arm 18 is fixed to the moving member 20 shown in FIG.

The moving member 20 has gripping pieces 22, 23 for gripping the guide rails 14, 15, 17 on both sides of the moving direction 21 of the cartridge 5, and the guide rails 14, 15.
Sliding contact pieces 24 and 25 that slidably contact the lower portions of 15 and 17 are formed on the base body 50. The gripping pieces 22 and 23 include the bent portion 22.
a and 23a respectively. In this moving member 20,
Moving direction 2 of gripping pieces 22, 23 and sliding contact pieces 24, 25
1 to the guide member 2 by the connecting piece 26 at an intermediate position.
7 is fixed. The guide member 27 includes the guide rails 14,
The upper and lower parts of 15 and 17 are partially surrounded by the bent parts 27a and 27b, and the overall shape is formed in a C shape. A fixed piece 28 is fixed to the guide member 27.

Referring again to FIGS. 1 and 2, the chassis 16 is provided with gears 29 and 30 meshing with each other. A gear 31 is coaxially fixed to the gear 29. A gear 32 meshes with the gear 31. A worm wheel 33 is coaxially fixed to the gear 32. The worm wheel 33 meshes with the wheel 34. A pulley 35 is fixed to the worm 34. A motor 36 is attached to the chassis 16.
The (driving means) is fixed. The belt 37 is attached to the pulley 37 fixed to the output shaft of the motor 36 and the pulley 35 described above.
8 is wound around, and power is transmitted by this. A winding drum 39 is fixed to the gear 29.
A pulley 41 (disc-shaped guide member) is supported by the support member 40 at the center of curvature of the guide rail 17. A cord 44 is wound around a winding drum 39, a guiding pulley 41, and pulleys 42 and 43 by a spring 45. The rope 44 (traction member) is shown in FIG.
The fixed piece 28 of the moving member 20 shown in FIG.

Here, the winding drum 39 and the pulley 4
1, 42, 43, the spring 45, etc. constitute the pulling member stretching means.

A light shielding plate 46 is coaxially fixed to the gear 30, and a plurality of light transmitting holes 47 are formed in the light shielding plate 46 at intervals in the circumferential direction. The light transmitting hole 47 is detected by the light detecting means 48 fixed to the chassis 16. Therefore, the movement amount of the cord 44 is detected, and the moving member 2
The positions of 0 and the cartridge 5 can be detected. A processing device (not shown) controls the motor 36 by the output from the detecting means 48.

The motor 36 is reciprocally movable, whereby the moving member 20 moves along the guide rails 14, 15, 17 in the moving direction 21 described above.

FIG. 5 is a plan view near the pulley 41, and FIG. 6 is a front view near the pulley 41. Moving member 20
5 is traveling along the linear guide rail 14 in FIG.
In the state of (1), the rattling with the guide rail 14 is suppressed by the action of the guide member 27. This state is as also shown in FIG. 6 (1).
The guide member 27 prevents displacement in the vertical direction of FIG. 5 and prevents angular displacement with respect to the guide rail 14. Further, together with the guide member 27, the gripping pieces 22 and 23 and the sliding pieces 24 and 25 prevent the vertical displacement in FIG. 6 and the angular displacement in the state shown in FIG. Maintains a horizontal posture with high accuracy.

The movable member 20 has a circular guide rail 17
The state in which the temperature has reached is shown in FIG. 5 (2) and FIG. 6 (2). The fixed piece 28 moves along the outer periphery of the pulley 41. At this time, the guide rail 17 is located closer to the base body 50 between the gripping pieces 22 and 23 and the sliding pieces 24 and 25. Accordingly, the fixed piece 28 can smoothly move on the outer circumference of the pulley 41. At this time, the gripping piece 2
2, 23 and the sliding pieces 24, 25 are separated from the guide rails, and the fixed piece 28, which is another guide means, is moved along the outer periphery of the pulley 41, so that the gripping piece 22 that contributes to maintaining the posture of the pickup , 23 and the sliding pieces 24, 25 are configured so that the accuracy does not deteriorate due to wear or the like caused by contact with the guide rail 17. As a result, the moving member 20 can be quickly moved on the arcuate guide rail 17 that does not require particularly high accuracy, and the quick moving member 20 can maintain a highly accurate posture. The moving member 20 on the required linear guide rails 15 and 14 is prevented from being adversely affected such as rattling. The guide rail 1
The state when the moving member 20 moves 5 is the same as the state when the guide rail 14 moves.

When the moving member 20 is moved along the guide rails 14, 15, 17 by the motor 36, the reproducing needle 6 of the cartridge 5 is separated from the record board 1. This prevents damage to the record board 1 and the reproducing needle 6. At the time of reproduction, the reproduction needle 6 of the cartridge 5 contacts the record board 1. In order to enable the performance of the record board 1 as described above, it is configured as follows.

FIG. 7 is a rear view of the vicinity of the chassis 16,
FIG. 8 is a sectional view seen from the right side of FIG. A part 14a of the guide rail 14 is supported by support shafts 51 and 52 so as to be angularly displaceable around an axis parallel to the extending direction of the guide rail 14 (the horizontal direction in FIG. 7). One end of the guide rail portion 14a is attached to the guide rail 14 by the support shaft 52.
Is supported by the remaining portion 14b of. The other end of the guide rail portion 14a is attached to the chassis 1 by the support shaft 51.
Supported by 6. The guide rail portion 14a has the support shaft 5
It has a projecting piece 53 projecting to the cartridge 5 side with respect to 1, 52. A guide member 54 is fixed to the chassis 16. A spring 55 is provided between the guide member 54 and the protruding piece 53.
Is intervened. As a result, the guide rail portion 14a is biased in the counterclockwise direction in FIG. 8 around the axes of the support shafts 51 and 52, whereby the needle 6 of the cartridge 5 can contact the surface of the record board 1. The pusher 56 that comes into contact with the projecting piece 53 is supported by the guide member 54 so as to be displaceable in the direction toward and away from the projecting piece 53. The contact portion 58 of the lever 57 can be brought into contact with the pusher 56.
One end of a spring 59 is connected to the lever 57.
The other end of the spring 59 is connected to the chassis 16. As a result, the contact portion 58 of the lever 57 of the spring 59 pushes the pusher 56 against the spring force of the spring 55 to push the pusher 56 downward, whereby the guide rail portion 14a can be angularly displaced. When the contact portion 58 of the lever 57 presses the pusher 56 with the spring force of the spring 59, the spring force of the spring 59 is:
The pusher 56 is selected to have a value sufficient to angularly displace the guide rail portion 14a against the spring force of the spring 55 as described above. The lever 57 includes a support shaft 60 and a support shaft 51, 52.
It is supported by the chassis 16 so as to be angularly displaceable around an axis perpendicular to the. An electromagnetic plunger 61 is connected to the lever 57, which drives the lever 57.

When reproducing the A side of the record board 1, the moving member 20 is held by the guide rail portion 14a. In this state, the electromagnetic plunger 61 is excited. As a result, the lever 57 is angularly displaced around the support shaft 60 in the clockwise direction in FIG. 7 against the spring force. As a result, the guide rail portion 14a is angularly displaced in the clockwise direction in FIG. 8 around the support shafts 51 and 52 by the spring force. Therefore, the reproducing needle of the cartridge 5 can contact the surface of the record board 1.

After the performance of the A side of the record board 1 is completed, the electromagnetic plunger 61 is demagnetized. Therefore, spring 5
Due to the spring force of 9, the contact portion 58 of the lever 57 pushes downward in FIG. 7 against the spring force of the spring 55 of the pusher 56. As a result, the guide rail portion 14a becomes
8 is angularly displaced in the counterclockwise direction in FIG. In this way, the reproduction needle 6 is separated from the A surface of the lever board 1.

One end of the other guide rail 15 is supported by the support member 40 by the support shaft 62, and
The support shaft 63 supports the chassis 16. In this way, the guide rail 15 can be angularly displaced around the axes of the support shafts 62 and 63. The axes of the support shafts 62 and 63 are
It is parallel to the turntable 2. The guide rail 15 has a protrusion 64 protruding toward the cartridge 5 side from the support shafts 62 and 63. The protrusion 64 is biased by a spring 65 in a direction in which the reproducing needle 6 of the cartridge 5 comes into contact with the record board 1. The pusher 66, which can be brought into contact with the protrusion 64, is guided by the guide member 67. The pusher 66 contacts the contact portion 69 of the lever 68. In the lever 68, the contact portion 69 is pushed by the spring 70.
Is biased in the direction of displacement against the spring force of the spring 65. The lever 68 is supported on the chassis 16 by a support shaft 71. The axis of the support shaft 71 is perpendicular to the axes of the support shafts 62 and 63. The lever 68 is connected to the electromagnetic plunger 72.

With the moving member 20 held by the guide rails 15 for playing the B side of the record board 1, the electromagnetic plunger 72 is excited for playing the record. The lever 68 resists the spring force of the spring 70 and supports the support shaft 71.
Is angularly displaced in the clockwise direction in FIG. As a result, the guide rail 15 causes the support shaft 6 to move by the spring force of the spring 65.
The reproducing needle 6 of the cartridge 5 can be brought into contact with the B surface of the record board 1 by being angularly displaced about the axes of 2, 63.

After the performance of the record, the electromagnetic plunger 72 is demagnetized. Therefore, the spring 70 has a lever 68.
Is angularly displaced counterclockwise in FIG. 7 around the axis of the support shaft 71. Therefore, the contact portion 69 of the lever 68 is
6 is displaced upward in FIG. 7 against the spring force of the spring 65.
Therefore, the pusher 66 presses the protrusion 64 upward in FIG. 7. The guide rail 15 is angularly displaced in the clockwise direction in FIG. 8 around the axes of the support shafts 62 and 63. In this way, the reproducing needle 6 separates from the B side of the record board 1. When the electromagnetic plunger 72 is demagnetized, the spring force of the spring 70 causes the contact portion 69 of the lever 68 to push the pusher 66 against the spring force of the spring 65 as described above, so that the guide rail 15 is pushed. The value is selected to be large enough to cause angular displacement around the axes of the support shafts 62 and 63.

The spring forces of the springs 55, 59, 65 and 70 are configured so that when the reproducing needle 6 comes into contact with the record board 1, the appropriate needle pressure is applied. Also pusher 56,
Reference numeral 66 includes a damper for absorbing impact force, which prevents the reproducing needle 6 from abutting against the record board 1 in a shocking manner, thereby enabling smooth playing. FIG. 9 is a block diagram of an electric circuit. The main body 11 is provided with an A-side button 81 and a B-side button 82 operated to play the A-side and B-side of the record board 1. Further, the main body 11 is provided with a play button 83 which is operated to start the performance. The signals from these buttons 81 to 83 are input to the processing circuit 84 realized by a microcomputer or the like. The electromagnetic solenoids 61 and 72 and the motors 8 and 36 are controlled by signals from the processing circuit 84.

It is assumed that the A side on the cover 10 side of the record board 1 is played. At this time, the A-side button 81 is operated. Thereby, the cartridge 5 and the moving member 20
Is on the guide rail 15, first the motor 36
Is driven. Therefore, the moving member 20 is the guide rail 1.
7 to reach the guide rail portion 14a of the guide rail 14, and the reproducing needle 6 reaches the position corresponding to the outermost sound groove in the radial direction of the record board 1. While the moving member 20 is moving, the electromagnetic solenoids 61 and 72 remain demagnetized, and the reproducing needle 6 does not come into contact with the record board 1 or the like. Prior to the operation of the A-side button 81, the motor 36 is not driven when the moving member 20 is in the position corresponding to the radially outermost sound groove of the record board 1 in the guide rail portion 14a of the moving member 20.

When the play button 83 is operated, the processing circuit 84 first drives the motor 8. As a result, the turntable 2 and the record board 1 are rotated. After the record board 1 reaches the steady speed, the electromagnetic solenoid 61 is excited. As a result, the reproducing needle 6 comes into contact with the record board 1 and the performance is started. As the performance progresses, the moving member 20 moves along the sound groove of the record board 1
Is moved radially inward.

When the reproducing needle 6 reaches the sound groove inward in the radial direction of the record board 1 to end the performance, the electromagnetic solenoid 61 is demagnetized and the motor 8 is deenergized.

After the reproducing needle 6 is separated from the record board 1, the motor 36 is driven, whereby the moving member 20 is moved radially outward of the record board 1 along the guide rail portion 14a. When the reproducing needle 6 reaches the position corresponding to the outermost sound groove of the record board 1 in the radial direction, the motor 36 is deenergized and enters the standby state.

When the play button 83 is operated again, the performance on the A side is started.

To play the B side, the B side button 82 is pressed.
When is operated, the motor 36 is driven, and the moving member 20 reaches the guide rail 15 from the guide rail 14 through the guide rail 17 and reaches the position shown by the phantom line 85 in FIG. At this time, the reproducing needle 6 is located at a position corresponding to the outermost sound groove in the radial direction of the record board 1. When the moving member 20 is in the position shown by the phantom line 85, the play button 83
Is operated to drive the motor 8. Therefore, the turntable 2 and the record board 1 rotate.
After reaching the steady speed, the electromagnetic solenoid 72 is excited and the reproducing needle 6 comes into contact with the surface B of the record board 1. The performance is performed by this. The subsequent operation is the same as the performance operation of the A side.

The present invention is not limited to the performance of a record board,
It can be implemented extensively for reading other discs.

As described above, according to the embodiment of the present invention, since the cartridge can be moved along both surfaces of the disc such as the record board, the automatic reproduction of the disc can be performed. It can be done with a common cartridge over both surfaces.

Further, as a means for moving the pickup, a linear pulling member is stretched along the moving path of the pickup, and the pulling member is driven to move the pickup along the guide rails. With a very simple structure, the pickup can be moved smoothly across both sides of the disc.

Further, since the fixed piece 28 of the moving member 20 is moved along the outer circumference of the pulley 41 on the arc-shaped guide rail, the fixed piece 28 on the arc-shaped guide rail 17 is provided. A stable and quick movement can be realized.

[0039]

As described above, according to the present invention, the pickup can be moved along both surfaces of the disk, so that automatic performance reproduction or the like can be performed on both surfaces of the disk. This can be done using a common pickup.

Further, as a means for moving the moving member supporting the pickup, a linear pulling member is stretched along the moving path of the pickup, and the pulling member is driven to move the moving means to a linear guide means. Since the configuration is such that the pickup is moved along the arcuate guide means, the pickup can be moved smoothly over both sides of the disc with an extremely simple configuration.

Furthermore, when the moving member moves from one side to the other side of the linear guide member, the moving member is guided by the disc-shaped guide member. Therefore, the moving member is moved from one side to the other side of the linear guide means. When doing so, stable movement can be realized.

[Brief description of drawings]

FIG. 1 is a cutaway sectional view of a first embodiment of the present invention as seen from the front.

2 is a horizontal cross-sectional view of the embodiment shown in FIG.

FIG. 3 is an enlarged cross-sectional view near the turntable 2.

FIG. 4 is a perspective view of a moving member 20.

FIG. 5 is a plan view near the pulley 41.

FIG. 6 is a front view of the vicinity of a pulley 41.

FIG. 7 is a rear view around the chassis 15.

FIG. 8 is a sectional view of the vicinity of the chassis 16 as seen from the right side in FIG.

FIG. 9 is a block diagram of an electric circuit.

[Explanation of symbols]

 1 Record board 2 Turntable 5 Cartridge 6 Regeneration needle 14 Linear guide rail 15 Linear guide rail 17 Semicircular arc guide rail 20 Moving member 39 Winding drum 41 Pulley 42 Pulley 43 Pulley

Claims (1)

Claim: What is claimed is: 1. A moving member supporting a pickup, and a pair of parallel members for guiding the moving member so that the pickup can move in the radial direction of the disk along both surfaces of the disk. Linear guide member, a linear pulling member fixed to the moving member midway along the track, a driving means for driving the pulling member, and guiding the moving member from one side of the linear guiding means to the other side. A disk-shaped member arranged such that its central axis is parallel to the disk surface and its rotation center is parallel to the guide direction of the linear guide means, and guides the pulling member on its peripheral surface. A guide means, a linear guide position along which the pulling member extends along the pair of linear guide means, and an arcuate guide position which is continuously guided from the linear guide position by the peripheral surface of the disc-shaped guide means. A pickup moving device comprising a pulling member stretching means for forming a loop by stretching.