JP2511122Y2 - Recording and / or playback device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording and / or reproducing apparatus, and more particularly to a compact disc (CD) player or the like.

[0002]

2. Description of the Related Art In a conventional CD player, a linear motor having a high operation sensitivity is often used as a drive mechanism for the pickup head in order to increase the speed at which the pickup head searches the CD track of the recording medium.

However, when a linear motor is used for the drive mechanism of the pickup head, no force is applied to the carriage of the movable part when the power of the CD player is not supplied. In this state, C
The carriage moves in accordance with the movement of the D player and collides with a peripheral mechanism, which may damage the carriage and the peripheral mechanism. Therefore the CD
It is necessary to hold the carriage by some means so that the player does not move when power is not supplied to the player.

In order to solve such a problem, for example, there is a structure in which a locking mechanism is provided so that the carriage is locked by the locking mechanism when power is not supplied to the CD player.

In addition to the above, for example, in a CD player using a CD housed in a disc case, a mechanism for locking a carriage by operating a locking mechanism in conjunction with a disc case ejecting operation is used. there were.

[0006]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the former configuration of the D players, there are many cases where the user needs to release the locking mechanism by his / her own hand when using the CD player. Therefore, when the user forgets to release the locking mechanism, the CD player does not operate normally, which may cause a problem.

Further, in the latter mechanism, when the CD player is transported without ejecting the disc case, the locking mechanism is not operated, so that the original carriage holding function cannot be achieved. There was a point.

The present invention has been made in view of the above problems, and when the power is not supplied to the recording and / or reproducing apparatus, the carriage is automatically held in a predetermined position and when the power is supplied. An object of the present invention is to provide a recording and / or reproducing device in which the holding is automatically released and a normal operation is performed.

[0009]

According to the present invention, a carriage for movably holding a head for writing and / or reading data on a recording medium, a pressing means for pressing the carriage, and a member for locking the pressing means. It is configured to have a stopping means and a carriage driving means for driving the carriage. The locking means releases the pressing means when the device is powered off, the pressing means presses the carriage to move to the holding position, and the locking means presses the carriage moved to the holding position to be held at the holding position. Lock the means in place. When the device is powered on, the locking means releases the pressing means, and the driving means drives the carriage to move the pressing means to the retracted position via the carriage. The pressing means retracted to the retracted position is locked at the retracted position by the locking means.

[0010]

When the power source of the apparatus is cut off, the carriage is moved to the holding position by the pressing means, and the carriage is held in the holding position by the locking means via the pressing means. When the device is turned on, the locking of the pressing means by the locking means is released,
The pressing unit is moved to the retracted position by the carriage driven by the driving unit, and the pressing unit retracted to the retracted position is locked by the locking unit.

[0011]

1 is a plan view of a slide feeding mechanism of a CD player (recording and / or reproducing apparatus) of a first embodiment of a recording and / or reproducing apparatus according to the present invention. In the figure, the slide feed mechanism is generally provided with a pickup head 3a (the head) fixed near the center and a carriage 3 provided with coils 3c and 3d forming left and right linear motors (the driving means), a coil 3b, and 3c and the yokes 4 and 5 which incorporate the magnets that constitute the linear motor.

In the slide feed mechanism having the above structure, the carriage 3 and the magnetic field formed by the magnets inside the yokes 4 and 5 are formed.
The carriage 3 is moved in the upper and lower X ₁ and X ₂ directions in the figure by the interaction with the currents flowing in the coils 3b and 3c, and within the operating range from the innermost track to the outermost track of the CD recording area. The configuration is such that the position of the pickup head 3a is arbitrarily controlled (within the operating range).

In the figure, a CD (not shown) is placed on the spindle motor 2, and the rotation of the spindle motor 2 causes the CD to rotate at a predetermined speed, so that the data recorded on the CD by the pickup head 3a is recorded. Of these, it is possible to access data of an arbitrary angle on the CD. In the figure, the carriage 3 in a state where the pickup head 3a accesses the CD is shown by a solid line.

In the above state, the laser beam generated by the laser diode in the optical processing unit 6 is bent in the optical path by the beam splitter in the optical processing unit 6 and the window 6a is formed.
Is emitted from. This laser light is picked up by the pickup head 3
The light enters the window 3d of a, is bent in the optical path by the prism in the pickup head 3a, and is emitted from the objective lens 3e.
It is focused on the recording surface of the CD. Further, the reflected light having the information recorded on the CD which is reflected from the recording surface of the CD is emitted from the window 3d through the objective lens 3e and the prism, and is incident on the window 6a of the optical processing section 6 to enter the optical processing section 6. The information recorded on the CD is reproduced by being analyzed.

In the figure, the position of the carriage 3 when the power of the CD player is turned off is shown by a broken line. In this state, the carriage 3 moves downward (the holding position) in FIG.
The window 3d of the pickup head 3a is the window 6 of the optical processing unit 6.
superimposed on a. This allows the respective windows 3d, 6a
Are covered with each other, it is possible to prevent dust and the like from adhering to the windows 3d and 6a when the power is cut off. Therefore, the disturbance of the laser beam due to the adhesion of dust etc. does not occur,
Noise is prevented from being mixed into the reproduced information.

In this state, the pickup head 3a
Objective lens faces the outermost track of the outermost track of the recording area of the CD mounted on the spindle motor 2. Therefore, even if the CD player is vibrated while the CD is mounted on the spindle motor 2, the objective lens 3e does not damage the recording area of the CD.

Next, the carriage lock mechanism which is the gist of the present invention will be described. The carriage lock mechanism generally presses the carriage 3 to move it to the carriage retreat position and holds it at the carriage retreat position (the pressing means), and the lock release arm 11 that holds the lock arm 10 at a predetermined position. (The locking means), and the solenoid 12 (the temporary urging means) that drives the lock release arm 11.

The lock arm 10 is rotatably supported by a support shaft 13, one end of which extends in a rod shape and a lever portion 10a.
And the other end is a fan-shaped lock portion 10b having an angle of approximately 90 °. Support shaft 13 of lever portion 10a
One end of the spring 10c (the first constant urging means) is hooked at a portion slightly closer to one end side than the portion supported by. The other end of the spring 10c is hooked on the housing of the CD player, and the elastic restoring force always exerts an action of pulling the lever portion 10a in the c direction in FIG.

The lock release arm 11 is rotatably supported by a support shaft 14, one end thereof extends in a rod shape to form a lock release portion 11a, and a cylindrical lock pin 11b is provided at the tip thereof. It is provided so as to project to the front side. The other end of the lock release arm 11 is bent 90 ° to the right in the figure at the boundary with one end, that is, the part supported by the support shaft 14, and then bent 90 ° to the lower side in the figure. It is a hook-shaped drive unit 11c. The tip of the drive unit 11c is rotatably supported by the tip of a pulling rod 12a of the solenoid 12. Further, one end of a spring 11d (the second constant urging means) is hooked on the shoulder portion of the right bent portion of the drive portion 11c in the same figure. The other end of the spring 11d is hooked on the casing of the CD player, and the elastic restoring force always exerts an action of pulling the drive portion 11c in the d direction in FIG.

When the solenoid 12 is excited, the solenoid 12 operates so as to pull the pulling rod 12a in the direction a in FIG. Further, when it is not excited, it is configured so as to be movable in the lateral direction of the drawing with a predetermined stroke.
As described above, the lock release arm 11 is the spring 1
The drive portion 11c is pulled in the d direction in the figure by 1d. Therefore, the lock release arm 11 is rotated in the counterclockwise direction (one direction described above) in the figure, whereby the pulling rod 12a of the solenoid 12 is moved so as to be pulled out in the direction opposite to a in the figure. In this way, the solenoid 12 is in the state of being pulled out to the right in the figure to the maximum within the predetermined stroke range. FIG. 1 shows its above position.

Next, the operation of the carriage lock mechanism having the above structure will be described. First, when using a CD player,
The carriage 3 is in the state shown by the solid line in FIG. At this time, since the solenoid 12 is not excited, the pulling rod 12a is in the position shown in the figure as described above, and the lock release portion 11a of the lock release arm 11 is also in the position shown in the figure. That is, the upper end of the lock portion 10b of the lock arm 10 in the figure is locked by the lock pin 11b. Therefore, the lock arm 10 receives a force by the spring 10c so that the lever portion 10a of the lock arm 10 rotates in the direction c, that is, the counterclockwise direction, but the lock portion 10b is locked by the lock pin 11b as described above. Has been done. Therefore, the lever portion 10a of the lock arm 10 is held at the position indicated by the solid line in the figure (the retracted position).

Therefore, the carriage 3 can freely operate on the yokes 4 and 5 by the action of the linear motor, and the CD mounted on the spindle motor 2 as described above.
Is accessed by the pickup head 3a,
You can play back the information recorded on the CD.

Next, when the use of the CD player is finished and the power is turned off (when the power is turned off), the magnets built in the yokes 4 and 5 and the coil 3 provided on the carriage 3 are used.
The function of the linear motor composed of b and 3c is stopped. Therefore, the carriage 3 is in a state where it receives no external force. On the other hand, in the carriage lock mechanism, when the power of the CD player is cut off, the solenoid 12 is excited by the operation of a circuit (not shown). In this case, for example, by storing the required power in a storage means such as a capacitor while the power is being supplied to the CD player, the power stored in the storage means is used when the power is cut off. The solenoid 12 can be excited.

When the solenoid 12 is excited in this manner, the pulling rod 12a is driven in the direction a in the figure as described above. As a result, the lock release arm 11 resists the elastic restoring force of the spring 11d to support the shaft 1
It is rotated in the clockwise direction in FIG. Therefore, the lock pin 11b at the tip of the lock release portion 11a is moved in the e direction in the figure. As a result, the lock pin 11b moves the lock portion 10 of the lock arm 10
It is not located above b in FIG. That is, the locking of the lock portion 10b by the lock pin 11b is released, and the elastic restoring force of the spring 10c causes the lock arm 10 to rotate counterclockwise (the one direction).

Next, the excitation of the solenoid 12 is stopped. As a result, the lock release arm 11 is again rotated counterclockwise by the action of the spring 11d. Therefore, a force is exerted so that the lock pin 11b moves leftward in the figure. At this time, if the lock pin 11b is in a state of facing the curved portion of the lock portion 10b, the lock pin 11b presses the curved portion of the lock portion 10b to the left in the figure. Further, the curved portion of the lock portion 12b is continuously rotated in the counterclockwise direction while sliding on the lock pin 11b, and the rotation is not locked again by the lock pin 11b.

As described above, the exciting time of the solenoid 12 is
While the lock pin 11b is moved in the e direction, the lock arm 10 rotates counterclockwise, and the lock release arm 1
The lock pin 11b of No. 1 is the lock portion 1 of the lock arm 10.
It may be almost instantaneous until the curved portion on the right side of 0b of FIG.

Since the solenoid 12 is excited in an extremely short time in this way, the capacity of the storage means such as the capacitor for supplying the electric power for exciting the solenoid 12 may be very small. Therefore, the influence on the entire CD player in terms of price can be reduced, and the space occupied by the storage means in the CD player can be relatively small, so that the CD
It is possible to reduce the influence on downsizing and thinning of the player.

When the lock arm 10 is rotated counterclockwise as described above, the lever portion 10a at one end of the lock arm 10 is rotated in the direction b in FIG. By the rotation of the lever portion 10a in the b direction, the tip of the lever portion 10a pushes the upper right corner portion of the carriage 3 in the same figure downward. As a result, the carriage 3 is moved in the X ₂ direction in the figure. As a result, the carriage 3 is in the state shown by the broken line in the figure. On the other hand, lock arm 1
With the rotation of 0, the lock portion 10b is moved upward in the figure to be in the state shown by the broken line in the figure.

Since the excitation of the solenoid 12 has already been stopped as described above, the lock release arm 11 is rotated counterclockwise in the figure by the action of the spring 11d and returns to the state shown in the figure again. That is, lock arm 1
The lock pin 11b is opposed to the lower linear portion of the 0-shaped lock portion 10b in FIG. Therefore, the lock pin 11
The lock arm 10 is locked by b so as not to rotate clockwise in FIG. In this way, the lock arm 1
The tip of the lever portion 10a of 0 is held in contact with the upper right portion of the carriage 3 in FIG. That is, as described above, the carriage 3 is held in a state where the window 3d of the carriage 3 is in contact with the window 6a of the optical processing unit 6 (the holding position).

Next, the operation when the power is supplied to the CD player (when the power is turned on) will be described. First, when power is supplied, the solenoid 12 is automatically excited by the operation of a circuit (not shown). As a result, the pulling rod 12a is moved in the direction a in FIG. 1, so that the lock release arm 11 is rotated clockwise in the figure against the elastic restoring force of the spring 11d. Therefore, the lock release portion 11a is rotated in the direction e in the figure, and the lock of the lock arm 10 by the lock pin 11b is released.

On the other hand, when a power source is supplied to the CD player, currents are simultaneously applied to the coils 3a and 3c in the linear motor including the coils 3b and 3c of the carriage 3 and the magnets in the yokes 4 and 5, respectively. As a result, the linear motor acts so as to move the carriage 3 upward in FIG. 1, that is, in the X ₁ direction. Thus the lever portion 10a of the lock arm 10 by the action is pushed upward in the drawing by the upper right portion of Figure 1 the carriage 3, i.e., in the X ₁ direction.

In this state, since the lock pin 11b is released from the lock portion 10b of the lock arm 10 as described above, the lock arm 10 is pushed by the spring 10c by pressing the carriage 3 by the action of the linear motor. It is rotated about the support shaft 13 in the clockwise direction (the other direction) in the figure, that is, in the direction opposite to the b direction against the elastic restoring force. When the lock arm 10 starts to rotate in this manner, the curved portion of the lock portion 10b of the lock arm 10 faces the left side of the lock pin 11b in FIG. In this state, when the lock pin 11b is pressed in the left direction in FIG.
1b contacts the curved portion of the lock portion 10b. Therefore, the clockwise rotation of the lock portion 10b in the figure is not locked, and the lock portion 10b continues to rotate in the clockwise direction of the figure while the curved portion slides on the lock pin 11b.

As described above, the action of the linear motor causes the lock arm 10 to start to rotate clockwise in the figure until the curved portion of the lock portion 10b faces the left side of the lock pin 11b in the figure. It suffices that the lock pin 11b be moved in the e direction only for a moment. That is, during that time, the lock release arm 1 is operated by the action of the solenoid 12.
1 may be rotated clockwise in the figure to move the lock pin 11b in the e direction in the figure. Therefore, the excitation time of the solenoid 12 may be short as in the case of the operation when the power source of the CD player is cut off.

In this way, the lock arm 10 is rotated clockwise in the figure to the state shown by the solid line in FIG. That is, the curved portion of the lock portion 10b moves downward while sliding on the lock pin 11b and passes the left side of the lock pin 11b. Further, during this time, as described above, the elastic release force of the spring 11d causes the lock release arm 11 to rotate in the counterclockwise direction in the figure, so that the lock pin 11b receives a pressing force in the left direction in the figure. The curved portion was pressed. Therefore, when the lock portion 10b passes on the left side of the lock pin 11b, the lock pin 11b is moved to the left side in the figure by the pressing, and the lock portion 11b is moved.
It is located above the straight line above the fan shape.

Therefore, the rotation of the lock arm 10 in the counterclockwise direction of FIG. 1, that is, in the b direction is locked by the lock pin 11b. Therefore, the lock arm 10 is held in the state shown by the solid line in FIG. 1 against the elastic restoring force of the spring 10c. When the lock arm 10 is in this state, even if the pickup head 3a accesses the innermost track of the recording area of the CD mounted on the spindle motor 2, the carriage 3 moves to the lever portion 10a of the lock arm 10. It is configured so as not to contact. Therefore, the carriage 3 is free to move in the X ₁ and X ₂ directions in the same figure, and the data recorded on the CD mounted on the spindle motor 2 can be accessed at a high speed.

FIG. 2 is a plan view of the slide feeding mechanism of the CD player of the second embodiment of the present invention. In FIG. 2, components that are substantially the same as those of the slide feeding mechanism of the CD player of the first embodiment described with reference to FIG. The slide feed mechanism of the CD player of the second embodiment is partially different from that of the first embodiment in the shape of the members constituting the carriage lock mechanism corresponding to the gist of the present invention.

That is, in the lock arm 10, the lever portion 1 extends so as to extend in the direction of the curved portion of the lock portion 10b.
0a is fixed to the lock portion 10b, and both the lock portion 10b and the lever portion 10a are provided in the same direction with respect to the support shaft 13. By disposing the lock portion 10b between the support shaft 13 and the carriage 3 in this manner, the lock release arm 11 and the solenoid 12 can be disposed close to the carriage 3. Therefore, the width of the slide feed mechanism including the carriage lock mechanism as shown in FIG. 2 can be reduced, and the space occupied by the slide feed mechanism in the CD player can be reduced. Therefore, the carriage lock mechanism is C
It is possible to suppress an obstacle to miniaturization of the D player.

The lever portion 10a is bent at two places so that it can be easily engaged with the carriage 3. That is, the shape is such that it is once bent upward in FIG. 2 toward the tip and then bent leftward in FIG. In FIG. 2, the spring 10c, which acts to pull the lever portion 10a downward in the figure, that is, in the direction c, to rotate the lock arm 10 in the counterclockwise direction in the figure, that is, in the direction b, is omitted. ing.

In addition, a projecting portion 10c is provided so as to project in the depth direction of FIG. 2 of the fan-shaped portion of the lock portion 10b.
The projecting portion 10c has a substantially fan shape having a diameter slightly smaller than that of the fan-shaped portion. Therefore, a step is formed by the curved portion of the projecting portion 10c near the curved portion of the back surface of the lock portion 10a on the depth side in the figure.

The lock release arm 11 is L-shaped. In the case of the first embodiment, the lock release arm 11 is rotated clockwise in FIG. 1 to release the lock of the lock arm 10 from the lock portion 10b. In this case, conversely, the lock release arm 11 is rotated counterclockwise in FIG. 2 to release the lock of the lock arm 10 from the lock portion 10b.

Further, unlike the case of the first embodiment, the pulling rod 12a of the solenoid 12 is not directly connected to the drive portion 11c of the lock release arm 11, but the pulling arm 12b is interposed therebetween. Further, unlike the case of the first embodiment, the spring 11d that acts to rotate the lock release arm 11 in the clockwise direction of FIG. 2 in order to hold the lock release arm 11 locked to the lock arm 10 is different from that of the first embodiment. It is hooked on the pulling arm 12b instead of 11.

In such a structure, the solenoid 12
2 is not excited by the elastic restoring force of the spring 11d, the pulling arm 12d moves downward in FIG.
The lock release arm 11 is pulled in the d direction and is rotated clockwise in the figure. This state is shown by the solid line in the figure. The lock pin 11b is configured to project toward the front side of the drawing at a height slightly smaller than the height of the protruding portion 10c provided on the lock portion 10b of the lock arm 10 in the depth direction of the drawing. In the above-mentioned state, the tip of the lock release portion 11b is the lock portion 1
0b of the lock pin 11b
The upper or lower part of the outer peripheral surface of FIG. 2 is in contact with the fan-shaped linear part of the lower part or the upper part of the lock part 10b in FIG.

On the other hand, when the solenoid 12 is excited, the pulling rod 12a is pulled upward in the figure against the elastic restoring force of the spring 11d. Accordingly, the pulling arm 12b is also moved upward in the same figure,
As a result, the lock release arm 11 is rotated counterclockwise in FIG. By this rotation, the lock release portion 11a is moved to the left side in the figure, and the lock of the lock portion 10b of the lock arm 10 by the lock pin 11b is released. This state is shown by the broken line in the figure.

In this state, the protruding portion 1 of the lock portion 10b is
The lock pin 11b is located on the left side of the figure from the outer peripheral surface of the curved portion of 0c. Therefore, the lock pin 11b can pass through the outer peripheral surface of the curved portion of the protrusion 10c. That is, the end face of the lock pin 11b on the front side in the figure is the protruding portion 1 of the back surface of the lock portion 10b in the figure.
It is configured to be located on the depth side of the figure from the outer peripheral side portion of the outer periphery of 0c. Therefore, the protrusion 10c of the fan-shaped portion of the lock portion 10b is locked by the lock pin 11b. The portion of the protruding portion 10c on the outer peripheral side of the curved portion has a guiding function when the lock pin 11b slides on the outer peripheral surface of the protruding portion 10c.

FIG. 3 is a perspective view of a part including a slide feeding mechanism portion of a CD player to which the slide feeding mechanism of the first and second embodiments can be applied. In the figure, FIG.
The same components as those described in FIG. 2 are designated by the same reference numerals, and the description thereof will be omitted. In the CD player 1 of the same figure, the CD 30 is inserted in the Y direction of the figure from the insertion / removal opening 24a provided in the front surface 24 of the CD player 1 while being housed in the disc case 30a. By this insertion, the disc case 30a is moved by the internal mechanism of the CD player 1 so that the CD 30 is placed on the spindle motor 2.

In this state, the data recording portion of the CD 30 is arranged above the carriage 3 in FIG. At the same time, an access window on the lower surface of the disk case 30a is opened by a mechanism (not shown), and the data recording portion of the CD 30 is accessed by the pickup head 3e through the access window.

Both ends of the carriage 3 are X ₁ , X in FIG.
It is supported by guide rods 21 and 22 so as to be movable in _two directions. A portion of the carriage 3 supported by the guide rods 21 and 22 includes a support wheel 23 for the guide rod 21.
Support wheels 23b and 23c for a and the guide rod 22 are provided, respectively. These support wheels 23a, 23
Since b and 23c are rotatably supported by the carriage 3, the carriage 3 can be smoothly moved between the guide rods 21 and 22.

Needless to say, the present invention can be applied not only to a CD player, but also to a recording and / or reproducing apparatus in which another pickup head moves.

[0049]

As described above, according to the present invention, since the carriage is retracted and held in the carriage retreat position when the power of the apparatus is cut off, the carriage does not move in the apparatus even when the apparatus is transported. Also, the surrounding mechanism is not damaged. Further, when the power is supplied to the apparatus, the pressing means is retracted to the pressing means retreat position by the carriage and the pressing means is held there, so that the carriage can move freely, which causes trouble in the operation of the apparatus. There is no. Therefore, the reliability and operability of the device can be improved.

[Brief description of drawings]

FIG. 1 is a plan view of a slide feeding mechanism of a CD player according to a first embodiment of the present invention.

FIG. 2 is a plan view of a slide feeding mechanism of a CD player according to a second embodiment of the present invention.

FIG. 3 is a perspective view of a part of a CD player including a slide feeding mechanism to which the present invention can be applied.

[Explanation of symbols]

 1 CD player (recording and / or reproducing apparatus) 2 Spindle motor 3 Carriage 3a Pickup head (head) 10 Lock arm (pressing means) 10c Spring (first constant biasing means) 11 Lock release arm (locking means) 11d Spring (the second constant urging means) 12 Solenoid (the temporary urging means) 30 CD (recording medium)

Claims (2)

(57) [Scope of utility model registration request] 1. A recording and / or recording head having a head for recording and / or reproducing information on a recording medium, and a carriage movably supported by the head for accessing an arbitrary position of the recording medium. In the reproducing apparatus, a pressing unit that presses the carriage to move to the holding position when the recording and / or reproducing apparatus is powered off, and drives the carriage during the power-on period of the recording and / or reproducing apparatus. Drive means for moving within the operation range of the carriage when the recording medium is accessed, and releasing the pressing means when the power is cut off to cause the pressing means to press the carriage to the holding position and turn on the power. At the same time, the pushing means is released to cause the driving means to drive the carriage, and the pushing means retracted to the retracted position by the movement of the carriage. A recording and / or reproducing apparatus having a structure including locking means for locking the pressure means in the retracted position. 2. A first constant urging means which is rotatably supported in one direction and the other direction and which always urges the pressing means to rotate in the one direction. When the power is turned off, the carriage is pressed to move to the holding position by being rotated in the one direction by the urging of the first constant urging means, and the drive means is configured to turn on the power. Sometimes the carriage is driven, the pressing means is rotated in the other direction via the carriage, the pressing means is retracted to the retracted position, and the locking means is bidirectional in one direction and the other direction. Second urging means which is rotatably supported and always urges the locking means to rotate in the one direction so as to lock the pressing means, and at the time of power-on and power-off For a predetermined time at each time, the second constant urging means is urged. The engagement of the locking means is rotated in the other direction has a temporary urging means for urging so as to release the pressing pressure means, when the power supply disconnection and,
When the temporary urging means is urged and rotated in the other direction to release the pressing means to rotate the pressing means in the one direction and the carriage is moved to the holding position by the pressing means. The urging of the temporary urging means is stopped and the pressing means is locked by being rotated in the one direction by the urging of the second constant urging means, and the temporary urging means when the power is turned on. Is urged to rotate in the other direction to release the pressing means, and the carriage is moved by the driving means to rotate the pressing means in the other direction to retract the pressing means to the retracted position. 2. The structure according to claim 1, wherein the pressing means is locked in the retracted position by stopping the urging of the temporary urging means and rotating the urging means in the one direction by the urging of the second constant urging means. Recording and / or playback Location.