JPH0719451B2 - Pickup moving device - Google Patents

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 so-called vertical linear tracking type double-sided record player.

[0002]

2. Description of the Related Art Conventionally, cartridges are 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 any undesired external force. ing. Therefore, the prior art is
Inferior in cost reduction.

The object of the present invention is to simplify the construction, to reduce the cost, and to directly use the peripheral surface of the pulley as a means for straddling the transmission member to the position bridging the pair of linear guide paths. Thus, the guide of the transmission member at the arcuate guide position and the continuous bridging of the transmission member from the arcuate guide position to the linear guide position are realized with a simple configuration, and a single pickup is realized. An object of the present invention is to provide a pickup moving device that can move smoothly over both sides of a disc.

[0007]

In order to solve the above-mentioned problems, the present invention provides a moving member supporting a pickup and the moving member so that the pickup moves in the radial direction of the disk along both sides of the disk. A pair of linear guide paths that are parallel to each other for guiding and the moving member is partially fixed.
Long and endless transmission member to be fixed, and the pair of linear
The pulley includes a pulley located between the ends of the guide path.
The peripheral surface of the lead guides the transmission member to the pair of straight lines.
The above-mentioned one is arranged in an arc shape between one ends of the paths.
Stretching the transmission member in parallel with the pair of linear guide paths
Means and the moving member is one of the pair of linear guide paths.
An arcuate track along the circumference of the pulley between the ends
Guide and support the movement of the moving member when drawing and moving
Provided outside the arcuate track support means and the moving member.
Driving force is transmitted to the moving member through the transmission member.
Also, the movable member is rotated in the forward and reverse directions to move the moving member to the pair of straight lines.
A moving unit that reciprocates between the inner paths,
The material is engaged with the above-mentioned pair of linear guide paths to move the material.
The linear movement of the member and the pair of moving members.
Linear movement that does not contribute to movement between the ends of the linear guide path
A guide is provided .

[0008]

SUMMARY OF] Driving the motor, transmission member linear guide via
Since it is driven along the arcuate guide position guided by the peripheral surface of the pulley from the straight guide position along the road ,
The moving member is moved from one of the linear guide path while being driven by the transmission member to the other linear guide route. Therefore, the pickup can be moved over both surfaces of the disc.

[0009]

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 pressed and fixed by a spring force by a crimping member 4 to a record board receiving portion 3 provided upright on a turntable 2.

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 the cartridge 5 receives the record board when the reproduction needle 6 of the cartridge 5 reaches the innermost groove in the radial direction of the record board 1 after the performance of the record is completed. 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 playback, it is desirable that their outer diameters be as large as possible, but as described above, it is selected in such a range that it does not 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 by the belt 7, a direct drive system in which a motor is 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 provided on the turntable 2 of the record board 1. 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 paths ) are connected by a guide rail 17 that is a semicircular portion 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 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, 23.
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 entire shape is formed in a C shape. Thus, the gripping pieces 22, 23 and the sliding contact piece 2
Numerals 4 and 25 are movable members which are engaged with the guide rails 14 and 15.
It functions as a linear movement guide that guides the linear movement of 20.
It 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 fixed to the gear 29 at the same time. 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.
The pulley 41 is supported by the support member 40 at the center of curvature of the guide rail 17. On the winding drum 39, the pulley 41 for guiding, and the pulleys 42 and 43, a long and endless transmission member 44 is provided as a spring 4.
It is tightly wound by 5. The rope 44 is shown in FIG.
The fixed piece 28 of the moving member 20 shown in FIG.

Here, the winding drum 39, the pulley 41,
42, 43, the spring 45 and the like constitute a transmission member stretching means, and the peripheral surface of the pulley 41 serves as a transmission member.
44 is placed between one ends of the pair of guide rails 14 and 15.
And a pair of guide rails 14, 1
It is arranged in parallel with 5.

A light shielding plate 46 is coaxially fixed to the gear 30, and a plurality of light passage holes 47 are formed in the light shielding plate 46 at intervals in the circumferential direction. The light passage hole 47 is detected by the light detection 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 above-mentioned moving direction 21.

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 in FIG. 5 and prevents angular displacement with respect to the guide rail 14. In addition to 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 directional posture with high accuracy.

The moving member 20 has a circular guide rail 17
The state where 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 fixing 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 their 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 arc-shaped guide rail 17 that does not require particularly high accuracy, and moreover, the quick moving of the 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 having an adverse effect 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. Above fixed piece
28, the moving member 20 is an arc along the peripheral surface of the pulley 41.
A plan for the movement of the moving member 20 when moving along a circular trajectory
The inner circular arc-shaped track support means is configured.

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 the record board 1 and the reproducing needle 6 from being damaged. 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 left-right direction in FIG. 7). Guide rail part 1
One end of 4a is supported by the support shaft 52 on the remaining portion 14b of the guide rail 14. The other end of the guide rail portion 14a is attached to the chassis 16 by the support shaft 51.
Supported by. The guide rail portion 14a includes a support shaft 51,
It has a projecting piece 53 projecting to the cartridge 5 side with respect to 52. A guide member 54 is fixed to the chassis 16. A spring 55 is interposed between the guide member 54 and the protruding piece 53. As a result, the guide rail portion 14a is attached to the support shaft 5
It is urged in the counterclockwise direction in FIG. 8 about the axes of 1, 52, whereby the needle 6 of the cartridge 5 can contact the surface of the record board 1. The pusher 56 that abuts the projecting piece 53 is supported by the guide member 54 such that the pusher 56 can be displaced toward and away from the projecting piece 53. An abutting portion 58 of the lever 57 can abut on 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, in the spring 59, the contact portion 58 of the lever 57 moves the pusher 56,
The guide rail portion 14a can be angularly displaced by pushing downward in FIG. 7 against the spring force of the spring 55. Spring 59
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 pusher 56 of FIG.
Is selected to 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 is supported by the chassis 16 by a support shaft 60 so as to be angularly displaceable around an axis perpendicular to the support shafts 51 and 52. 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 of the spring 59. As a result, the guide rail portion 14a is angularly displaced in the counterclockwise direction in FIG. 8 around the support shafts 51 and 52 by the spring force of the spring 55. Therefore, the reproducing needle 6 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 the pusher 56 downward in FIG. 7 against the spring force of the spring 55. As a result, the guide rail portion 14a is attached to the support shafts 51, 52.
8 is angularly displaced in the counterclockwise direction in FIG. In this way, the reproducing needle 6 separates from the A surface of the record board 1.

One end of the other guide rail 15 is supported by the support member 40 by a 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 parallel to the turntable 2. On the guide rail 15,
It has a projecting piece 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. Pusher 6
6 contacts the contact portion 69 of the lever 68. Lever 68
Is urged by the spring 70 such that the contact portion 69 displaces the pusher 66 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 pusher 72.

While the moving member 20 is 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 spindle 71.
Is angularly displaced in the clockwise direction in FIG. As a result, the guide rail 15 is moved by the spring force of the spring 65 to the support shaft 6
The reproducing needle 6 of the cartridge 5 can come 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 about the axis of the support shaft 71 in the counterclockwise direction in FIG. 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 for 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. Pusher 56,
Reference numeral 66 includes a damper for absorbing impact force, which prevents the reproducing needle 6 from abutting on 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 has 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.
Is provided. Further, the main body 11 is provided with a play button 83 that is operated to start a performance. The signals from these buttons 81 to 83 are input to the processing circuit 84 realized by a microcomputer or the like. Electromagnetic solenoid 61, 72 and motor 8, 36
Are controlled by signals from the processing circuit 84. It is assumed that the side A on the cover 10 side of the record board 1 is played. At this time, the A-side button 81 is operated. As a result, when the cartridge 5 and the moving member 20 are on the guide rail 15, the motor 36 is driven first. Therefore, the moving member 20 reaches the guide rail portion 14a of the guide rail 14 via the guide rail 17, and the reproducing needle 6 reaches a 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 innermost sound groove in the radial direction of the record board 1 to end the performance, the electromagnetic solenoid 61 is demagnetized and the motor 8 is demagnetized.

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 innermost sound groove of the record board 1 in the radial direction, the motor 36 is demagnetized and is in a standby state.

When the play button 83 is operated again, the performance of 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, 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 at a position corresponding to the innermost sound groove in the radial direction of the record board 1. When the moving member 20 is at the position indicated 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 B surface 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 can be widely applied not only for playing the record board 1 but also 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, since the peripheral surface of the pulley 41 is directly used as a means for stretching the rope 44 at the position where the linear guide rail is bridged, the rope 44 in the pulley 41 portion is used.
And the continuous stretching of the cord 44 from the circular guide position to the straight guide position can be realized with a simple configuration.

Further, since the fixing piece 28 is moved along the outer circumference of the pulley 41 on the arcuate guide rail, it is possible to move stably and quickly on the arcuate guide rail 17. Can be realized.

[0038]

As described above, according to the present invention, the pickup can be moved along both surfaces of the disk, so that automatic reproduction such as playing can be performed commonly on both surfaces of the disk. This can be done using a pickup.

Further, since the peripheral surface of the pulley is directly used as a means for stretching the transmission member at the position bridging the pair of linear guide paths , the guide of the transmission member in the circular orbit and the circle of the transmission member. It is possible to smoothly and surely continuously stretch from the orbital track to the straight guide path with a simple structure.

Further , the moving member has a pair of linear guide lines.
Guides and moves in linear motion of the moving member by engaging with the road
A linear movement plan that does not contribute to the movement of the member along the arcuate trajectory
By providing the inside, when moving the moving member
The posture can be kept stable during the linear movement of the backup
And the moving member's arc shape
The movement along the track can be performed quickly and smoothly, and
High accuracy is required to guide the movement along the arcuate trajectory of
Without, it is possible to realize simplification of the guide structure as a whole.
It

[Brief description of drawings]

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

FIG. 2 is a horizontal 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 near the pulley 41.

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

FIG. 8 is a cross-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 3 Cartridge 6 Regeneration needle 14 Linear guide rail 15 Linear guide rail 17 Semicircular arc guide rail 20 Moving member 30 Winding drum 41 Pulley 42 Pulley 43 Pulley

Claims (1)

[Claims] 1. A moving member supporting a pickup, a pair of linear guide paths parallel to each other for guiding the moving member so that the pickup moves in a radial direction of the disk along both sides of the disk, and a part thereof. The moving member
Long and endless transmission member to be fixed, and the pair of straight lines
Including a pulley located between one ends of the profile guide path,
The transmission member by the peripheral surface of the pulley
In addition to arranging in an arc shape between the one ends of the inner path,
Stretching the transmission member in parallel with the pair of linear guide paths
Means and the moving member of the pair of linear guide paths.
An arc-shaped track along the circumference of the pulley between the ends.
Guiding and supporting the movement of the moving member when moving along the road
A circular arc-shaped track support means that is provided outside the moving member.
Driving force is transmitted to the moving member through the transmission member.
Also, the movable member is rotated in the forward and reverse directions to move the moving member to the pair of straight lines.
A moving unit that reciprocates between the inner paths,
The material is engaged with the above-mentioned pair of linear guide paths to move the material.
The linear movement of the member and the pair of moving members.
Linear movement that does not contribute to movement between the ends of the linear guide path
A pickup moving device having a guide portion .