JP3240957B2 - Recording and playback 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 recording / reproducing apparatus configured to perform a tape loading operation and an unloading operation for pulling out a magnetic tape in a holder or a tape cassette into which a tape cassette is inserted via a gear mechanism driven by a motor. Related to the device.

[0002]

2. Description of the Related Art For example, as a recording / reproducing apparatus, there is a multi-channel tape recorder (MTR) for recording an 8-channel audio signal by PCM using an 8-mm video tape cassette. In this type of recording / reproducing apparatus, a tape cassette mounting mechanism that moves a tape cassette inserted into a holder to a mounting position, mounts the tape cassette into a eject position by an eject operation, and There is provided a tape loading mechanism that pulls out the magnetic tape from the tape cassette mounted at the mounting position and winds the magnetic tape around a rotary drum (having a rotary head), or separates the magnetic tape from the rotary drum and returns the magnetic tape to the tape cassette.

The tape cassette mounting mechanism and the tape loading mechanism include a gear mechanism including a plurality of gears and a motor for driving the gear mechanism. A worm is provided on the rotating shaft of the motor in order to prevent the motor from being rotated by the load of the gear mechanism when the power supply to the motor is stopped. A torsion spring is incorporated between the gears of the gear mechanism so that the tape cassette and the holder are stopped at a predetermined mounting position or an ejecting position. The torsion spring is elastically deformed by a motor torque, and the elastic force at that time is obtained. Is applied to the holder. Therefore, even after the tape cassette and the holder arrive at the predetermined mounting position or the eject position, the motor is driven against the spring force of the torsion spring. And the torque acts on the gears by the motor inertia force even after the holder stops.

[0004]

However, in the conventional recording / reproducing apparatus having the above structure, the driving force of the motor is transmitted to the gear mechanism even after the holder stops, so that the worm gear of the tape cassette mounting mechanism is engaged. In this state, even if the motor is rotated in the reverse direction, the motor cannot escape from the engaged state, and the motor does not rotate. Therefore, the rotational torque of the motor has to be limited.

In the tape loading mechanism, the position is detected by a rotary encoder.
Stop positions corresponding to the respective operation modes (recording, reproducing, fast-forwarding, and rewinding modes) are determined in advance. However, since a small clearance (backlash) is provided between the teeth of each gear for smooth rotation transmission, each gear rotates by the inertia force of the motor even after the motor stops. In addition, there is a problem that the stop position of the tape cassette driven by the tape cassette mounting mechanism or the stop position of the magnetic tape driven by the tape loading mechanism goes beyond a predetermined target stop position, resulting in an overrun.

If an overrun occurs at the end point of the movable range of the gear, each gear of the tape loading mechanism is engaged, and even if the motor rotates in the reverse direction, it cannot escape from the engaged state, and the motor rotates. Therefore, each gear has to increase the strength to ensure durability or to limit the rotational torque of the motor.

Therefore, an object of the present invention is to provide a recording / reproducing apparatus which solves the above-mentioned problems.

[0008]

The present invention has the following features to solve the above-mentioned problems. Claim 1
The described invention has a holder in which a recording medium is inserted, a gear mechanism for transporting the holder, and a motor for driving the gear mechanism, and a mounting position at which the recording medium can be recorded and reproduced by driving the motor. or the recording and reproducing apparatus is moved to the recording medium can be taken out of the eject position, that the recording medium is moved to the mounting position or the eject position
Detecting means for detecting
Switching the rotation direction of the motor and is characterized by comprising comprises a motor control means for reversely rotating a preset predetermined time, the.

[0009] Thus, according to the first aspect of the invention, that the recording medium is moved to the mounting position or the eject position
The direction of rotation of the motor is
Since the switching is performed and the motor is reversely rotated for a predetermined period of time, the rotation of the motor is suppressed, and it is possible to prevent the motor from stopping in a state in which the gear of the gear mechanism is engaged. The invention according to claim 2 is a recording / reproducing apparatus according to claim 1.
Wherein the motor control means drives the motor.
After a predetermined time has elapsed from the start, the rotation of the motor is decelerated.
It is characterized in that that.

Therefore, according to the invention of claim 2, the module
After a predetermined time has elapsed since the start of
Since the speed is increased, the tape loading mechanism is prevented from excessively moving beyond the tape loading position or the unloading position due to the inertial force, so that the tape loading mechanism can be accurately stopped at the predetermined mounting position or the eject position, and the overrun can be prevented. Further, it is possible to prevent the gear mechanism from stopping in a state where the gear is engaged.

According to a third aspect of the present invention, there is provided the recording / reproducing apparatus according to the first or second aspect, wherein the motor control means reversely rotates the motor for a predetermined time . It is characterized in that the rotation of the motor is braked . Therefore, according to the third aspect of the present invention, the motor is reversely rotated for a predetermined time set in advance .
After that, in order to brake the rotation of the motor, the rotation of the motor is suppressed in advance, and it is possible to prevent the gear mechanism of the gear mechanism from stopping in a state of being engaged, and to reduce the amount of overshoot due to the inertial force. It can be stopped at the stop position.

[0012]

[0013]

[0014]

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a tape cassette mounting mechanism showing an embodiment of a recording / reproducing apparatus according to the present invention, and FIG. 2 is a plan view of the tape cassette mounting mechanism. First, a tape cassette mounting mechanism 1 to which the present invention is applied will be described. The tape cassette mounting mechanism 1 is a mounting device used in a multi-channel tape recorder (MTR) that performs PCM recording of 8-channel audio signals as a recording / reproducing device.

The tape cassette mounting mechanism 1 has an 8 mm VT
A configuration in which a holder 3 on which a tape cassette 2 for R (video tape recorder) is mounted is moved to a mounting position;
Generally, a holder 3 and a gear mechanism 4 for moving the holder 3
And a holder driving motor 5 for rotating the gear mechanism 4 to move the holder 3. The holder 3 horizontally extends along an L-shaped guide groove 7 penetrating from the inside to the outside of the side plate 6 disposed on both sides and an L-shaped guide groove 7 (not shown) formed inside the side plate 6. After moving, it descends in the hanging direction to reach the mounting position. Also, during the eject operation,
The holder 3 is returned to the cassette eject position by performing an operation reverse to the mounting operation.

The gear mechanism 4 and the motor 5 are connected to the right side plate 6.
And a cover 8 attached to cover the side plate 6. The gear mechanism 4 includes a rotating arm 10 that is inserted into the guide groove 7 and engages with a pin 9 that protrudes outside the side plate 6, a cam gear 11 integrally connected to the rotating arm 10, and a cam gear 11. It comprises reduction gears 12 to 15 disposed between the motor 5. A torsion spring (not shown) is provided inside the cam gear 11 to bias the rotating arm 10 to bias the holder 3 to the cassette eject position or the mounting position.

The first reduction gear 12 meshes with the cam gear 11 of the rotary arm 10, and the second reduction gear 13 meshes with the first reduction gear 12 and a large-diameter gear 13a integrally provided with the small-diameter gear 13a. And a diameter gear 13b. Also, the third
The reduction gear 14 includes a small diameter gear 14a that meshes with the large diameter gear 13b of the second reduction gear 13, and a large diameter gear 14b provided integrally with the small diameter gear 14a. The fourth reduction gear 15 meshes with the large-diameter gear 14 b of the third reduction gear 14 and also meshes with the worm 16 press-fitted into the rotating shaft 5 a of the motor 5.

The motor 5 is a DC motor, is driven at a constant speed at a predetermined high-speed rotation, and its rotation is reduced by reduction gears 12 to 15 and transmitted to the rotating arm 10. An engagement groove 10 a in which a pin 9 protruding from the side surface of the holder 3 is inserted is formed in the rotation arm 10 so as to extend in the radial direction.
Therefore, when the rotating arm 10 rotates in the direction B, the holder 3 is moved to the mounting position by being guided by the guide groove 7 in which the pin 9 slides. When the rotating arm 10 rotates in the direction A, the holder 3 is guided by the guide groove 7 in which the pin 9 slides, and returns from the mounting position to the cassette eject position.

FIG. 3 is a side view showing an operation state in which the holder 3 has been moved to the mounting position. Provided inside the side plate 6 is an inlet switch 17 that is pressed and closed when the rotating arm 10 rotates in the direction A. This entrance switch 1
When the holder 3 returns to the cassette eject position, the holder 7 is pressed by the rotating arm 10 and outputs a detection signal.

A rotating arm 10 is provided outside the side plate 6.
Is rotated in the direction B, a lever 18 that slides on the cam 11a of the cam gear 11 of the rotating arm 10 is rotatably supported, and a mounting switch 19 that is closed by being pressed by the tip of the lever 18 is provided. It is arranged. When the cam gear 11 rotates in the direction B and the holder 3 reaches the mounting position (see FIG. 3), the mounting switch 19 is turned on by the tip of the rotary arm 10 pressing the lever 18 and the cam gear is turned on. 11 is rotated in the direction A and the holder 3 is in the eject position.
1 (see FIG. 1) , the cam 11a of the cam gear 11 presses the lever 18 and rotates clockwise to switch on.

The reason why the mounting switch 19 is used to detect the arrival of the holder 3 at the eject position is that there is a difference between the insertion position where the tape cassette 2 is inserted into the holder 3 and the eject position. Because there is.
That is, when the tape cassette 2 is inserted into the holder 3 and the holder 3 is pressed in the insertion direction, a motor switch (not shown) is turned on and the motor 5 is driven to rotate in the forward direction. ing.

The entrance switch 17 and the mounting switch 19 are connected to a control circuit 20. When a detection signal is output from the entrance switch 17 or the mounting switch 19 in a memory of the control circuit 20, a motor for driving the motor 5 is provided. A control program for outputting a control signal to the driver 21 to drive the motor 5, and for rotating the motor 5 in a reverse direction for a predetermined time after a predetermined time has elapsed is stored. Therefore, the holder 3 can be accurately stopped at a predetermined stop position.

Next, the motor control processing executed by the control circuit 20 in the tape cassette mounting mechanism 1 having the above-described configuration will be described. FIG. 4 is a flowchart for explaining processing executed by the control circuit 20 at the time of an eject operation;
FIG. 5 shows that the entrance switch 17 and the mounting switch 19 are
6 is a timing chart illustrating an off operation. The process shown in FIG. 4 is a process for returning the holder 3 to the eject position.

When an eject button (not shown) is turned on, an eject command is input and the processing shown in FIG. 4 is started. The control circuit 20 drives the motor 5 to rotate in the reverse direction in step S1 (hereinafter, "step" is omitted). Thus, the worm 1 of the motor 5
6. The turning arm 10 is turned in the direction A via the gears 11 to 15 to move the pins 9 projecting from the side surfaces of the holder 3 along the guide grooves 7.

In the next S2, it is confirmed whether or not the mounting switch 19 has been turned off. When the rotation arm 10 rotates in the direction A, the holder 3 moves upward from the mounting position, and when the rotation arm 10 separates from the lever 18 and the mounting switch 19 is turned off, the holder 3 starts the ejecting operation. It is determined that the operation has been performed, and the process proceeds to S3, where 300 msec
Check if it has passed. This 300 msec is an average time required for the holder 3 to move from the mounting position to an intermediate position between the eject positions.

When the holder 3 starts moving from the mounting position,
When 0 msec has elapsed, it is determined that the holder 3 has reached the intermediate position where the holder 3 reaches the eject position, and the process proceeds to S4, in which the current supplied to the motor 5 is limited, and the rotation of the worm 16 is reduced. Subsequently, it is confirmed whether or not the mounting switch 19 has been switched from off to on in S5. Rotating arm 1
When 0 rotates in the direction A and the holder 3 reaches the position immediately before the eject position, the cam 11a of the cam gear 11 contacts the lever 18 and switches the mounting switch 19 on.
If it is detected in S5 that the mounting switch 19 has been turned on (see FIG. 5B), the process proceeds to S6, and the motor 5 is driven to rotate in the forward direction. That is, the motor 5 is rotated in the reverse direction.

In the next S7, it is checked whether 10 msec has elapsed, and the motor 5 is rotated in the reverse direction until 10 msec has elapsed. Then, after 10 msec has elapsed in S7, the process proceeds to S8, in which the motor 5 is further decelerated by applying a back electromotive force to perform braking. Subsequently, in S9, the mounting switch 19 and the entrance switch 17
Is turned on (see FIGS. 5A and 5B). If the entrance switch 17 is turned on in S9, it is determined that the holder 3 has arrived at the predetermined cassette insertion position, and the process proceeds to S10, in which the power supply to the motor 5 is stopped and the rotation of the motor 5 is stopped. Thus, the tape cassette 2 inserted in the holder 3 can be taken out.

If the entrance switch 17 is not turned on in S9, since the holder 3 has not arrived at the cassette insertion position, the flow shifts to S11 to drive the motor 5 in the reverse direction. Then, the processing after S5 is executed again to correct the stop position of the holder 3. Therefore, when the entrance switch 17 is not turned on in S9, the motor 5
Is driven in the reverse direction, and when the mounting switch 19 is turned on in S5, the process proceeds to S6, in which the motor 5 is again rotated in the forward direction again to adjust the stop position of the holder 3 to the predetermined eject position. .

As described above, when the tape cassette 2 as a recording medium is moved to the eject position together with the holder 3, the motor 5 is reversely rotated for a predetermined time before the motor 5 stops. The holder 3 can be accurately stopped at a predetermined ejection position. By rotating the motor 5 in reverse for a predetermined time before the motor 5 stops, the gear mechanism 4
The gears 11 to 15 and the worm 16 can be prevented from stopping in a state of being engaged.

Therefore, the tape cassette 2 and the holder 3
Can be accurately stopped at the eject position, overrun can be prevented, and the gears 11 to 15 of the gear mechanism 4 and the worm 16 can be prevented from being stopped in the engaged state. In FIG. 4, the motor control operation when the tape cassette 2 and the holder 3 mounted at the mounting position are moved to the eject position has been described, but the tape cassette 2 and the holder 3 mounted at the eject position are mounted at the mounting position. Is performed, the same processing as in the flowchart shown in FIG. 4 is performed.

Next, a tape loading mechanism to which the present invention is applied will be described. 6 is a plan view of a tape loading mechanism in a state where a magnetic tape is wound around a rotary drum, FIG. 7 is a plan view showing an operation of the tape loading mechanism, and FIG. 8 is a front view showing a tape path of the magnetic tape wound around the rotary drum. FIG. On the upper surface of the chassis 25, reel stands 28, 29 on which the tape reels 26, 27 of the tape cassette 2 are mounted stand upright. Below the stand, the reel stands 28, 29 are rotationally driven according to each operation mode. A reel drive mechanism 30 is provided. The magnetic tape 24 wound around the tape reels 26 and 27 is pulled out of the tape cassette 2 by the tape loading mechanism 31 and wound around the outer periphery of the rotating drum 32.

The rotary drum 32 has four rotary heads (not shown) and performs PCM recording of audio signals of each channel on the magnetic tape 24 running while sliding on the outer periphery. Around the rotating drum 32, guide grooves 33 and 34 for guiding a tape loading operation and a tape loading mechanism 31 are provided. Tape loading mechanism 31
Is composed of loading members 36 and 37 that move to a tape loading position or an unloading position along the guide grooves 33 and 34, and link mechanisms 38 and 39 that drive the loading members 36 and 37. The loading members 36 and 37 transfer the magnetic tape 24 to the tape cassette 2.
After being pulled out from the rotary drum 32, rollers 36a, 37a for regulating the winding position with respect to the rotating drum 32 and inclined poles 36b, 37b stand up.
Due to the inclination of 37b, it is spirally wound around the outer periphery of the rotating drum 32.

The link mechanisms 38 and 39 include first links 38a and 39a connected to the loading members 36 and 37, respectively.
, Second links 38b and 39b connected to the first links 38a and 39a, and gears 38c and 39c provided at the base ends of the second links 38a and 39a. Since the first links 38a, 39a and the second links 38b, 39b are rotatably connected by connecting pins, the loading members 36, 37 can be bent and extended by the guide grooves 33, 3.
4 can be moved.

The gears 38c and 39c are meshed with each other, and are driven to rotate in opposite directions by a tape loading motor 40 during a tape loading operation or an unloading operation, respectively. The rotation of the tape loading motor 40 is performed by the worm 42, the worm wheel 43, the shaft 44, the worm gear 45, the gear 46, and the cam gear 4.
7 to the gears 38c and 39c. And
Loading members 36 and 37 and link mechanisms 38 and 39
7 is at the hatched position in FIG. 7 during the unloading operation, and moves to the position indicated by the solid line in FIG. 7 by the tape loading operation.

The magnetic tape 2 is mounted on the chassis 25.
Tension post 51 for regulating the running position of 4
, An impedance roller 52, a capstan guide 53, a pinch roller 54, a capstan 55, and a final guide 56. Accordingly, the magnetic tape 24 pulled out from the tape reel 26 slides against the rollers 36a, 37a of the loading members 36, 37, the inclined poles 36b, 37b, and the respective regulating members provided on the chassis 25, while slidingly contacting the outer periphery of the rotating drum 32. , And is wound on the tape reel 27.

FIG. 9 is a plan view showing a mechanism for detecting the positions of the loading members 36 and 37. The operation positions of the loading members 36 and 37 according to each operation mode are detected by a rotary encoder (detection means) 57. The rotation of the cam gear 47 is provided to the rotary encoder 57 by a gear 58.
When the signal is transmitted through ６１ <b> 61, 4
This is a configuration for outputting a bit signal. Therefore, the control circuit 20 determines the loading members 36 and 37 from the combination of the 4-bit signals output from the rotary encoder 57.
Can be recognized.

The rotary encoder 57 has contacts in sliding contact with four rows of arc-shaped conductor portions formed on a disk-shaped base, and outputs a signal corresponding to the arrangement pattern of the arc-shaped conductor portions. It is configured to be. Therefore, even if the power supply to the tape loading motor 40 is cut off and the rotation is stopped, the worm 42 and the worm wheel 4
3. The shafts 44, the worm gears 45, the gears 46, the cam gears 47, and the gears 58 to 61 for transmitting the rotation of the cam gears 47 to the rotary encoder 57 are rotated by the inertia force and the variation of the load in each part to set the stop position. Sometimes you go too far.

The control circuit 20 controls the operation of the tape loading motor 40 in order to prevent such an overrun from overrunning the operating position. When the loading members 36 and 37 of the tape loading mechanism 31 are operated in a state immediately before reaching the tape loading position or the unloading position, the memory of the control circuit 20 controls the motor 40 to reversely rotate for a predetermined time. The program is stored. for that reason,
The tape loading mechanism 31 is prevented from excessively moving beyond the tape loading position or the unloading position due to the inertial force, and can be stopped accurately.

FIG. 10 is a flowchart for explaining the processing executed by the control circuit 20 during the unloading operation. When the eject button (not shown) is turned on, the control circuit 20 drives the tape loading motor 40 to rotate in the reverse direction in S21. In the next S22, it is checked whether or not the loading members 36 and 37 have moved to the unloading position. That is, when the start point of the unloading detection range is detected by the rotary encoder 57, the process proceeds to S23, and the motor 40 is reversely rotated in the forward direction.

In the next S24, it is checked whether or not 20 msec has elapsed.
To reverse rotation. When 20 msec has elapsed in S24, the process proceeds to S25, in which the motor 40 is further decelerated by applying a back electromotive force to the motor 40 to perform braking. Subsequently, in S26, it is checked whether 30 msec has elapsed, and the rotation of the motor 40 is braked until 30 msec has elapsed. After 30 msec has elapsed in S26, the process proceeds to S27, and it is checked whether the position detected by the rotary encoder 57 is within the unloading detection range.

In step S27, the rotary encoder 5
If the detection position by 7 is within the unloading detection range, it is determined that the loading members 36 and 37 are in the unloading position, and the process proceeds to S28, in which the power supply to the motor 40 is stopped to stop the rotation of the motor 40. . Since the loading members 36 and 37 have returned to the unloading position, the magnetic tape 24 slidably contacting the rotating drum 32 is returned into the tape cassette 2.

If it is determined in step S27 that the position detected by the rotary encoder 57 is out of the unloading detection range, the flow advances to step S29 to determine whether the position detected by the rotary encoder 57 has overrun the unloading detection range. judge. If it is determined in step S29 that the overrun has not occurred, the process proceeds to step S30, in which the motor 40 is driven to rotate in the forward direction, and the loading member 36,
Return the 37 stop position. If the overrun has occurred in S29, the process proceeds to S31, in which the motor 40 is driven to rotate in the reverse direction to advance the stop positions of the loading members 36 and 37.

After the processing of S30 or S31, the flow returns to S22, and the processing after S22 is executed again to correct the unloading stop position. As described above, when the rotary encoder 57 detects that the tape loading mechanism 31 has moved to the unloading position, the motor 40 is reversely rotated for a predetermined time, and then the rotation of the motor 40 is braked. Each gear of the tape loading mechanism 31 can be accurately stopped at a predetermined unloading position without excessively passing the unloading position due to inertial force.

When the position of the rotating body is detected as in the case of the rotary encoder 57, the unloading position is detected to be excessive, and if the motor 40 is simply rotated in the reverse direction to correct the unloading position, the motor 40 Rotation is too strong and may go too far, resulting in an oscillation state in which this is repeated many times. However, in the present embodiment, after the rotation of the motor 40 is reduced,
Then, in order to brake the rotation of the motor 40, the motor 40
The motor 40 can be stopped in a state where the torque of the motor 40 is reduced, and it is possible to prevent the motor 40 from going too far from the stop position.

In the above description, the loading member 3
The motor control for moving the motors 6, 37 to the unloading position has been described.
Motor control for moving the 37 to the tape loading position is performed in the same manner as in the unloading operation. In the above embodiment, the recording / reproducing apparatus in which the tape cassette for the 8 mm VTR is mounted is described as an example. However, the present invention is not limited to this, and the present invention can be applied to motor control used for DAT, VTR, and the like. Of course.

[0047]

As described above, according to the first aspect of the present invention, the recording medium is moved to the mounting position or the eject position.
Rotation of the motor in response to the output of the detection means for detecting that
Since the direction is switched and the motor is reversely rotated for a preset predetermined time, the rotation of the motor is suppressed, and it is possible to prevent the gear mechanism of the gear mechanism from stopping in a stuck state.

According to the second aspect of the present invention, the mode
Motor rotation is decelerated a predetermined time after the start of motor drive
Let therefore, possible to prevent the tape loading mechanism is prevented from overshooting the tape loading position or unloading position can be stopped precisely at the predetermined mounting position or the eject position by the inertia force, overrun. Further, it is possible to prevent the gear mechanism from stopping in a state where the gear is engaged.

According to the third aspect of the invention, after the motor is reversely rotated for a preset predetermined time, the rotation of the motor is braked. It is possible to prevent a stop in the state of being bitten, to reduce an overshoot amount due to an inertial force, and to stop at a predetermined stop position.

[0050]

[Brief description of the drawings]

FIG. 1 is a side view of a tape cassette mounting mechanism showing an embodiment of a recording / reproducing apparatus according to the present invention.

FIG. 2 is a plan view of a tape cassette mounting mechanism.

FIG. 3 is a side view showing an operation state in which the holder has moved to a mounting position.

FIG. 4 is a flowchart illustrating a process executed by the control circuit during an eject operation.

FIG. 5 is a timing chart showing ON / OFF operations of an entrance switch and a mounting switch.

FIG. 6 is a plan view of a tape loading mechanism in a state where a magnetic tape is wound around a rotating drum.

FIG. 7 is a plan view showing the operation of the tape loading mechanism.

FIG. 8 is a front view showing a tape path of a magnetic tape wound around a rotating drum.

FIG. 9 is a plan view showing a loading member position detection mechanism.

FIG. 10 is a flowchart illustrating a process executed by the control circuit during an unloading operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tape cassette mounting mechanism 2 Tape cassette 3 Holder 4 Gear mechanism 5 Holder driving motor 10 Rotating arm 11 Cam gear 12-15 Reduction gear 16 Worm 17 Inlet switch 18 Lever 19 Mounting switch 20 Control circuit 24 Magnetic tape 25 Chassis 26, 27 Tape reel 28, 29 Reel base 30 Reel drive mechanism 31 Tape loading mechanism 32 Rotary drum 33, 34 Guide groove 36, 37 Loading member 38, 39 Link mechanism 40 Tape loading motor 42 Worm 43, 45 Worm wheel 44 Shaft 46 Gear 47 Cam gear 57 Rotary encoder 58-61 Gear

Claims (3)

(57) [Claims] 1. A mounting position in which a recording medium is inserted, a gear mechanism for transporting the holder, and a motor for driving the gear mechanism, wherein the recording medium can be recorded and reproduced by driving the motor. Or, in a recording / reproducing apparatus for moving the recording medium to an eject position where the recording medium can be taken out, detecting means for detecting that the recording medium has moved to a mounting position or an eject position; and A recording / reproducing apparatus, comprising: a motor control means for switching a rotation direction and performing reverse rotation for a predetermined time set in advance. 2. The recording / reproducing apparatus according to claim 1, wherein the motor control means decelerates the rotation of the motor after a lapse of a predetermined time from the start of driving of the motor. 3. The recording / reproducing apparatus according to claim 1, wherein the motor control means reversely rotates the motor for a predetermined time and then brakes the rotation of the motor. Characteristic recording / reproducing device.