JPH1049937A - Magnetic recording/reproducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic recording/reproducing device capable of easily switching to fast-forwarding and reduced in an operational amount and effective for miniaturizing the device and reduced in power consumption and costs. SOLUTION: During a recording/ reproducing operation, FW(forward) or RV(reverse) reel shafts 14 and 16 are rotated via a capstan gear 4, FW or RV switching gears 6 and 7 and reel gears 15 and 17 and, during a fast- forwarding/rewinding operation which is a high-speed feeding operation, or during a queueing/reviewing operation, a gear driving system is switched by moving a PF switching plate and the rotation of the FW or RV reel shafts 14 and 16 are rotary-driven via the capstan 4, the FW or RV switching gears 6 and 7 and FW or RV intermediate gears 9 and 10 or FW or RV idle gears 11 and 12 and reel gears 14a and 16a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic recording / reproducing apparatus, and more particularly to a magnetic tape feeding / driving mechanism in a magnetic recording / reproducing apparatus.

[0002]

2. Description of the Related Art In a conventional magnetic recording / reproducing apparatus, in particular, when switching between forward and reverse in a tape running direction is performed by a magnetic tape drive mechanism in a small-sized tape recorder, a forward-side reel in a drive gear system The mechanical state of the gear system for driving the reverse side reel drive is switched by mechanical operation, and the magnetic tape is moved in the forward direction,
Alternatively, the vehicle can be made to run in the reverse direction. The switching of the tape running direction is performed at the time of a tape feed operation or a tape fast-forward operation during reproduction, or at the time of a tape fast-forward operation in a reproduction state, that is, at the time of a cue / review operation.

[0003]

However, in the above-mentioned conventional small-sized tape recorders and the like, when the tape running direction is switched as described above, a mechanical operation is required. Therefore, it is difficult to reduce the size of the device because a complicated switching operation mechanism is required. Further, since the switching cannot be performed by a switch operation, frequent switching operations in a cue / review operation are difficult. Furthermore, since a mechanical switching operation is required, it has been difficult to employ the auto reverse method.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and in a tape feed drive mechanism of a magnetic recording / reproducing apparatus, switching of a tape running direction can be performed without mechanical operation. In addition, the switching operation to the rapid traverse can be performed by a simple operation, the driving mechanism itself has a simple configuration, and the amount of operating force is small, which is advantageous for miniaturization of the device, power saving and cost reduction. An object of the present invention is to provide a certain magnetic recording / reproducing apparatus.

[0005]

A first magnetic recording / reproducing apparatus according to the present invention is provided so as to be spaced apart from one reel shaft having one first reel gear and the one reel, and to provide the other first magnetic recording / reproducing apparatus. And a second reel gear connected to the one first reel gear via a slip mechanism, and a second reel gear connected to the other first reel gear via a slip mechanism. And a capstan having a capstan gear, which is rotationally driven bidirectionally by a motor, is rotated following the rotation direction of the capstan, and is provided with a stopper portion. A moving member, one first intermediate gear rotatably supported by the rotating member and meshed with the capstan gear, and the capstan rotatably supported by the rotating member; And a first intermediate gear of the other to be meshed with the gear. Further, a switching member having a contact portion capable of contacting the stopper portion of the rotating member, wherein the contact portion moves to a different position between recording / reproduction of the magnetic tape and high-speed feeding, and a predetermined position. One second intermediate gear rotatably supported, another second intermediate gear rotatably supported at a predetermined position, meshed with the one second intermediate gear, and the switching One idler gear that moves between a position engaged with the one first reel gear and a position not engaged with the one first reel gear in conjunction with the movement of the member, and is engaged with the other second intermediate gear; And the other floating gear that moves to a position where it meshes with the other first reel gear and a position where it does not mesh with the movement of the other first reel gear. In the magnetic recording / reproducing apparatus, when switching from high-speed feeding to running on the reel axis during recording / reproducing, switching is performed by moving a switching member. When switching the tape running direction, the switching is performed according to the rotation direction of the motor.

In the second magnetic recording / reproducing apparatus of the present invention, the floating gear is supported by an elastic member, and is biased in a direction away from the first reel gear. In the above magnetic recording / reproducing apparatus, by moving the switching member, the elastic member is deformed to move the floating gear from the non-meshing position to the meshing position with respect to the first reel gear.

A third magnetic recording / reproducing apparatus according to the present invention is characterized in that the one and the other first intermediate gears, the one and the other second intermediate gears, the one and the other first reel gears, and the one and the other. The other second reel gear and the one and the other idler gears have the same gear shape between the one and the other, respectively. In the magnetic recording / reproducing apparatus, since the gear shape between the one and the other is the same, the drive motor is driven by the one and the other reel shafts at the same reduction ratio with respect to the drive motor. Further, the arrangement spaces of the gear mechanisms on the one side and the other side are also symmetric.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1, 2, 3, and 4 are plan views showing respective operating states of a drive mechanism for feeding a magnetic tape in a magnetic recording and reproducing apparatus according to an embodiment of the present invention. The tape feed drive mechanism includes a gear drive unit and an operation unit, and this drive mechanism is also applicable as a tape feed drive mechanism of an automatic reverse type magnetic recording / reproducing apparatus. Therefore, the magnetic head, the automatic reverse switching drive mechanism of the pinch roller, and the like are separately incorporated.

First, the gear drive section is mainly rotatably supported by a drive motor 1 and an apparatus body 41 (see FIG. 6), and is fixed to a capstan pulley 2 driven by the motor 1 in a belt. A capstan 3 and a capstan gear 4 that are integrally driven to rotate, a rotation lever 5 rotatably supported by the main body 41 and rotating following the rotation of the capstan pulley 2, 5 is a planetary gear which is rotatably supported and always meshes with the capstan gear 4, and is a FW (forward) switching gear 6, which is one first intermediate gear, and the other first intermediate gear. Guided by the RV (reverse) switching gear 7, the guide groove 41d and the guide pin 41e of the main body, slide in the direction D8 which is a direction perpendicular to the running direction of the magnetic tape,
P which is a switching member movable to the P8A position and the P8B position
An F switching plate 8, an FW intermediate gear 9 as one second intermediate gear rotatably supported at a predetermined position of the main body 41, and an RV intermediate gear 10 as the other second intermediate gear; A gear support plate 13 supported by the main body 41 and having arms 13a and 13b, which are elastic members capable of elastic deformation;
The arm portions 13a and 13b of the gear support plate 13 are urged in a retreating direction from the meshable reel gears 14a and 16a, which will be described later, to be rotatably supported, and always mesh with the FW intermediate gear 9 and the RV intermediate gear 10. One FW idle gear 1
1, the other RV floating gear 12 and the FW floating gear 11, one first FW reel gear 14a meshable with the RV floating gear 12, or the other first RV reel gear 16a are integrally provided. FW reel shaft 1
4, the RV reel shaft 16 and the FW reel shaft 1
4, one second FW reel gear 1 supported coaxially with the RV reel shaft 16 via a slip mechanism 19b and capable of meshing with the FW switching gear 6 and the RV switching gear 7.
5 and the other second RV reel gear 17.

The FW and RV switching gears 6 and 7, F, which constitute the FW side drive system and the RV side drive system, respectively.
W, RV intermediate gears 9 and 10, first FF, RV reel gears 14a and 16a, second FF, RV gears 15 and 17,
The corresponding gears of the floating gears 11 and 12 have the same gear shape.

The operation section is a member for switching the recording / reproduction direction, and slides in the D1 direction.
A DIR (direction) operation plate 21 movable to the P21A position and the P21B position, and a member for fast-forwarding / rewinding or cueing / reviewing operation. The member is guided by the guide pin 41a of the main body and slides in the direction D2. A FR operation plate 22 movable from a neutral position P22C to a P22A position and a P22B position, and a member for performing a recording / playback operation. The member is guided by a guide pin 41b of the main body and slides in the D3 direction to move the pressing position. P23A position and P23B at release position
A RP operation plate 23 movable to a position and a member for driving the PF switching plate 8, which is urged by a spring 26 and slidable in the D0A and D0B directions in conjunction with the movement of the FR operation plate 22. FR gear plate 24 and the first FW, RV
A member for locking / unlocking the reel gears 14a, 16a, which is urged by a spring 51 and
2, or D0A, D in conjunction with the movement of the RP operation plate 23.
A member that is slid in the 0B direction and that is urged counterclockwise by a spring (not shown) and released by a stop button (not shown), and a gear lock plate 25 having lock claws 25e and 25f. An RP operation plate lock lever 28 for locking the RP operation plate 23 at the pressing operation position P23A,
The torsion spring 50 is rotatably supported by the DIR operation plate 21 and does not operate when the operation force of the FR operation plate 22 is not applied.
A switch actuator 27 held at a neutral position relative to the DIR operation plate 21 by the biasing force of
A switch 31 operated by a switch actuator 27 and a switch for turning on / off the power of the drive motor 1 and the like, and a power switch which is turned on by sliding movement of the FR gear plate 24 or the gear lock plate 25 in the D0A direction. 32.

The magnetic recording / reproducing apparatus includes a magnetic recording / reproducing head 33 for FW (forward), a magnetic recording / reproducing head 34 for RV (reverse), and a pinch roller 3.
5 is supported on the apparatus main body 41 by a support lever (not shown). When the RP operation plate 23 is pressed to the position P23A to enter the recording or reproduction state, and the DIR operation plate 21 is at the position P21A (FW mode),
The magnetic head 33 is extended to the magnetic tape sliding contact position. In addition, when in the P21B position (RV mode), R
The V magnetic head 34 is extended to the magnetic tape sliding contact position. At the same time, the pinch roller 35 is also extended to a position where the pinch roller 35 contacts the capstan 3.

Next, details of each part of the drive mechanism having the above-described configuration will be described. FIG. 5 shows a vertical cross-sectional view of the operation unit, in which the RP operation plate 23, the DIR operation plate 21, the FR operation plate 22, the FR gear plate 24, and the gear lock plate 25 are assembled in this order from above. D of RP operation plate 23
Movement in three directions is performed by the gear lock plate 2 via the projection 23d.
5 is transmitted. Then, the lock claws 25e and 25f of the gear lock plate 25 retreat, and the FW, RV reel gear 1
The locks of 4a and 16a are released.

The FR gear plate 24 has an F gear as shown in FIG.
When the R operation plate 22 is in the neutral position P22C, the operation plate 2
A V-groove 24a is provided at a position facing the second claw 22a. When the FR operation plate 22 is at the neutral position P22C, the gear lock plate 25 has a V-groove 25a at a position facing the claw 22a, and is fitted when moved to the left and right movement positions P22A and P22B. V-groove 25 shallower than groove 25a
b, 25c are provided.

When the FR operation plate 22 is slid in the direction D2, the pawl 22a presses the side surface of the V-groove 24a of the FR gear plate 24 to move the FR gear plate 24 in the direction D0A. Due to the movement, the projection 8c sandwiched by two V-grooves 24b provided at the tip of the FR gear plate 24 on the PF switching plate 8 side.
, The PF switching plate 8 moves from the P8B position to the P8A position.

When the FR operation plate 22 is moved in the direction D2, the claw 22a is moved to the V groove 25 of the gear lock plate 25.
a, and is fitted into the V groove 25b or V groove 25c. By this operation, the gear lock plate 25 moves in the direction D0A, the lock claws 25e and 25f retreat, and F
The locks of the W and RV reel gears 14a and 16a are released.

FIG. 6 is an exploded perspective view around the rotary lever / PF switching plate in the switching gear driving section. The rotating lever 5 rotatably supported by the main body 41 has FW and RV switching gears 6 rotatably supported.
7, two stopper portions 5a and 5b are fixed.

When the PF switching plate 8 moves along the direction D8, the P8B
When moving from the position (see FIG. 1) to the position P8A (see FIGS. 3 and 4), the cam 8e of the switching plate 8
Of the arms 13a and 13b are moved outward. By this movement, the FW floating gear 11 and the RV floating gear 12 both become the first FW reel gear 14a or R
It meshes with the V reel gear 16a. Then, the rotating lever 5
Rotates clockwise or counterclockwise to abut against the main body stopper 41f or 41g, and the FW switching gear 6 or the RV switching gear 7 is connected to the FW intermediate gear 9,
Or, it meshes with the RV intermediate gear 10.

On the other hand, when the PF switching plate 8 is
8B, the arms 13a, 1a of the gear support plate 13 move.
The tip of 3b escapes inward along the cam 8e of the switching plate 8. By this movement, the FW floating gear 11 and the RV floating gear 12 are both disengaged from the first FW reel gear 14a or the RV reel gear 16a.

At this time, when the rotation direction of the motor 1 is switched, the rotating lever 5 rotates clockwise or counterclockwise, and the stopper 5a or 5b
Abuts on the contact portion 8d of the PF switching plate 8, and the FW switching gear 6 or the RV switching gear 7 meshes with the second FW reel gear 15 or the RV reel gear 17.

When the rotation direction of the motor 1 is not switched, the contact portion 8d of the PF switching plate 8
As a result, the stoppers 5a and 5b of the rotating lever 5 are pressed, the rotating lever 5 is rotated counterclockwise or clockwise, and the FW switching gear 6 or the RV switching gear 7 is moved to the second FW. The gear meshes with the reel gear 15 or the RV reel gear 17.

FIG. 7 is a longitudinal sectional view of the FW reel shaft or the RV reel shaft and the reel gear. In addition, it has the same structure as the FW reel shaft side and the RV reel shaft side. Here, the FW side will be described. The FW reel shaft 14 having the first FW reel gear 14a and the second FW reel gear 15 are rotatably supported by a support shaft 42 of a support plate 41h supported by the main body 41. And the support plate 4
1h and the second FW reel gear 15, and further, the second F
Between the W reel gear 15 and the reel shaft 14, a friction mechanism 19a and a slip mechanism 19b each formed by a torsion coil spring and utilizing frictional force are provided.

When the gear lock plate 25 moves in the direction D0B, the lock claws 25e of the gear lock plate 25 are fitted into the teeth of the first FW reel gear 14a, and the first FW reel gear 14a is locked. Conversely, the above lock is released by the movement in the direction D0A. This lock / lock release operation is also performed by the lock claw 25f for the first RV reel gear 16a.

FIG. 8 is a perspective view of a switch actuator supported by the DIR operation plate and a changeover switch supported by the main body 41. DIR operation plate 21 has support shaft 21a
The switch actuator 27 is rotatably mounted on the support shaft 21a, and the hooks at both ends of the torsion spring 50 supported by the support shaft 21a move in the direction perpendicular to the sliding direction (D1 direction) from the position of the support shaft 21a. The extended positioning rod portion 21b and the actuator 27 are held in an integrated state, the switch operating portion 27a of the actuator 27 is supported so as to be located directly below the positioning rod portion 21b, and the changeover switch 31 is connected to a predetermined connection state. I keep it.

However, when the FR operation plate 22 is operated and the pressing portion 22b or 22c presses the stem portion of the actuator 27, the switch operation portion 27a of the actuator is pressed in the pressing direction. As a result, the connection state of the switch 31 is changed.

Now, when the DIR operation plate 21 is at the P21A position and the FR operation plate 22 is at the P22C position or the P22A position, as shown in FIG.
7, the common contact piece 31C is pressed and the switch 3
As for 1, the contact piece 31a side is turned on. When the FR operation plate 22 is moved to the position P22B from this state, for example, as shown in FIG. 3, the actuator 27 is pressed by the pressing portion 22b and held in an inclined state.
The one contact piece 31b side is turned on.

When the DIR operation plate 21 is at the P21B position and the FR operation plate 22 is at the P22C position or the P22B position, as shown by a two-dot chain line in FIG. Turn on. When the FR operation plate 22 is moved to the position P22A from this state, the actuator 27 is pressed by the pressing portion 22c, and FIG.
In this case, the contact 31a of the switch 31 is turned on. When the contact piece 31a of the changeover switch 31 is on while the power switch 32 is on, the motor 1 is driven clockwise. When the contact piece 31b side of the changeover switch 31 is on, the motor 1 is driven counterclockwise.

Next, the operation of feeding a magnetic tape of the magnetic recording / reproducing apparatus of the present embodiment configured as described above will be described. This magnetic recording / reproducing apparatus has a forward mode (FW mode) in which the traveling direction of the magnetic tape during recording / reproduction is the forward direction, and a reverse mode (RV mode) in which the traveling direction is the reverse direction. The FW / RV mode has a recording / playback mode, a fast-forward / rewind mode, and a cue / review mode. In the FW / RV mode, the DIR operation plate 2 is used.
1 is selected by moving it to position P21A or P21B.

First, a description will be given of a state at the time of recording / reproduction in the FW mode. FIG. 1 shows a state of the drive mechanism in an off state, in which the DIR operation plate 21 is at the P21A position and is set to the FW mode. . FIG. 2 shows a recording / reproducing operation state in the FW mode of FIG. In this operation state, the FR operation plate 22 is at the neutral P22c position, and the RP
The operation plate 23 is pressed to the position P23A, and the pinch roller 35 is pressed.
Abuts on the capstan 3 with the tape in between, and the recording / reproducing head 33 also moves to a position where it comes into sliding contact with the magnetic tape. Further, the gear lock plate 25 also moves in the D0A direction, and the FW, R
The lock of the V reel gears 14a and 16a is released, and the power switch 32 is turned on at the same time. Further, since the DIR operation plate 21 is in the P21A position, the changeover switch 31
Is turned on on the side of the contact piece 31a.

Accordingly, the motor 1 is driven clockwise, and the capstan gear 4 is driven clockwise. The rotation lever 5 is also driven clockwise.
Is at the P8B position, the stopper 5a rotates to the P5A position at which the stopper 5a contacts the contact portion 8d of the PF switching plate 8, and the FW
The switching gear 6 meshes with the FW reel gear 15. Thus, the rotation of the FW reel gear 15 is controlled by the slip mechanism 19b.
Is transmitted to the FW reel shaft 14 via the. The RV switching gear 7 and the floating gears 11 and 12 are in a state where they do not mesh with the other gears. In the above-described state, the magnetic tape is wound around a reel fitted on the FW reel shaft 14, and recording or reproduction in the FW direction is performed. During recording and playback, the reel shaft 1 is connected via a slip mechanism.
Rotate 4,16.

In order to switch the mode to the RV mode, the DIR operation plate 21 is moved to the position P21B, so that the switch actuator 27 receives the signal shown in FIG.
7 'and the contact piece 31 of the changeover switch 31
The b side turns on. Since the motor 1 rotates counterclockwise, the rotation lever 5 rotates counterclockwise, and the stopper 5b
Rotates to the P5B position where it contacts the contact portion 8d, and the RV switching gear 7 meshes with the RV reel gear 17.

Further, the switching to the RV mode at the time of recording / reproduction does not necessarily have to be performed by switching the DIR operation plate 21 to perform the mode switching. At least the switching of the gear driving unit is performed only by switching the rotation direction of the motor 1. Yes (at the time of auto-reverse operation).

In the above-mentioned state, the pinch roller 35 and the magnetic recording / reproducing head 34 also move to the recording / reproducing position, and the magnetic tape is wound on the reel mounted on the RV reel shaft 16, and the recording and reproducing in the RV direction is performed. Alternatively, reproduction is performed.

Next, the operation in the fast forward / rewind mode, which is the high speed feed operation in the FW mode, will be described. FIG.
Indicates an operation state of the rewind mode in the FW mode. This rewind operation is performed when the DIR operation plate 21 is set to P21A.
The operation is performed by moving the FR operation plate 22 to the P22B position while the RP operation plate 23 is at the release position P23B. The pawl 22a is fitted and held in the groove 25c of the gear lock plate 25 by the movement of the FR operation plate 22, moves the FR gear plate 24 and the gear lock plate 25 in the D0A direction, and operates the power switch 32 and the motor 1 at high speed. A high-speed switch (not shown) for rotation is turned on.

In the above-described operation state, the switch actuator 27 rotates about the support shaft 21a, the switch 31 is turned on on the contact piece 31b side, and the motor 1 rotates counterclockwise. Further, since the PF switching plate 8 moves to the P8A position by moving the FR gear plate 24 in the D0A direction, the rotary lever 5 rotates to the P5D position at which the stopper 5b contacts the main body stopper 41g. . In this state, the RV switching gear 7 meshes with the RV intermediate gear 10, and furthermore, the RV floating gear 12 is connected to the first RV
It is in mesh with the reel gear 16a. The pinch roller 35 does not contact the capstan 3. Therefore,
The counterclockwise rotation of the motor 1 is transmitted via the switching gear and the like, and rotates the RV reel shaft 16 counterclockwise, whereby the magnetic tape is rewound in the RV direction.

The fast-forward operation in the FW mode is performed by the DI
When the R operation plate 21 is in the P21A position (that is, the changeover switch 3
1 in a state where the contact piece 31a side is on) and the RP
With the operation plate 23 in the release position P23B,
This is performed by moving the operation plate 22 to the position P22A. The movement of the FR operation plate 22 causes the claw 22a to be fitted and held in the groove 25b of the gear lock plate 25, move the FR gear plate 24 and the gear lock plate 25 in the DOA direction, and rotate the power switch 32 and the motor 1 at high speed. The high-speed switch (not shown) is turned on.

In the above operation state, the motor 1 is driven to rotate clockwise, so that the rotary lever 5 rotates to the P5C position, and the FW switching gear 6 and the FW intermediate gear 9 mesh. Then, the FW reel shaft 14 is rotated via the FW idle gear 11 and the first FW reel gear 14a, and the magnetic tape is rapidly fed in the FW direction.

In the rewinding operation in the RV mode, D
With the IR operation plate 21 at the position P21B and the RP operation plate 23 at the release position P23B, the FR operation plate 22 is moved to the position P22.
This is done by moving to position A. The movement of the FR operation plate 22 causes the claw 22A to move to the gear lock plate 2.
5, the FR gear plate 24 and the gear lock plate 25 are moved in the DOA direction, and the power switch 32 and a high-speed switch (not shown) for rotating the motor 1 at high speed are turned on. .

In the above-mentioned operation state, the switch actuator 27 rotates around the support shaft 21a ', the switch 31 turns on the contact piece 31a side, and the motor 1 rotates clockwise. Further, since the PF switching plate 8 moves to the position P8A when the FR gear plate 24 moves in the DOA direction, the rotary lever 5 has rotated to the position P5C at which the stopper 5a comes into contact with the main body stopper 41f. . In this state, the FW switching gear 6 meshes with the FW intermediate gear 9, and the FW idle gear 11 meshes with the first FW reel gear 14a. In addition, the pinch roller 3
5 is not in contact with capstan 3. Accordingly, the clockwise rotation of the motor 1 is transmitted through the switching gear and the like, and rotates the FW reel shaft 14 clockwise, whereby the magnetic tape is rapidly fed in the FW direction.

In the fast forward operation in the RV mode, the DI
When the R operation plate 21 is in the P21B position (that is, the changeover switch 3
1 in a state where the contact piece 31b side is turned on) and the RP
With the operation plate 23 in the release position P23B,
This is performed by moving the operation plate 22 to the position P22B. The movement of the FR operation plate 22 causes the claw 22a to be fitted and held in the groove 25c of the gear lock plate 25, move the FR gear plate 24 and the gear lock plate 25 in the DOA direction, and rotate the power switch 32 and the motor 1 at high speed. The high-speed switch (not shown) is turned on.

In the above operation state, the motor 1 is driven to rotate counterclockwise, so that the rotary lever 5 rotates to the position P5D, and the RV switching gear 7 and the RV intermediate gear 10 mesh. Then, the RV reel shaft 16 is rotationally driven via the RV floating gear 12 and the first RV reel gear 16a, and the magnetic tape is rapidly fed in the RV direction.

Next, the cue / review operation in the FW mode will be described. FIG. 4 is a diagram showing a review operation state in the FW mode.
When the RP operation plate 23 is set to the pressed position P23A (that is, the power switch 32 is on) while the FR operation plate 22 is moved to the position P22B in the state where the FR operation plate is moved to the position A, the review operation is performed. Will be

Note that the FR gear plate 24 is formed by the FR operation plate 22, and the gear lock plate 2 is formed by the RP operation plate 23.
5 move in the D0A direction, but the FR operation plate 2
Since the second claw 22a is not fitted into the groove 25c of the gear lock plate 25, when the hand is released from the FR operation plate 22, the neutral P
It is returned to the 22C position, the review operation is stopped, and normal playback operation is resumed. Here, FR gear plate 2
When the motor 4 moves in the DOA direction, a high-speed switch (not shown) for rotating the motor 1 at a high speed is turned on.

Since the RP operation 23 is located at the position P23A, the pinch roller 35 comes into contact with the capstan 3 with a magnetic tape interposed therebetween, and the magnetic recording / reproducing head 33 is also extended to a position where it comes into sliding contact with the magnetic tape. It is kept in a playable state.

Then, by moving the FR operation plate 22 to the position P22B, the switch actuator 27 is rotated around the support shaft 21a, the contact piece 31b of the changeover switch 31 is turned on, and the motor 1 is turned counterclockwise. Is driven to rotate. The rotating lever 5 is rotated to the position P5D shown in FIG.
This is the same as the rewind state in the W mode. In the state set as described above, the magnetic tape is rewound on the reel on the FV reel shaft 16 side at a high speed, and the review operation is performed.

Incidentally, the queue operation in the FW mode is performed by the DI
With the R operation plate 21 being moved to the P21A position (that is, the contact piece 31a side of the changeover switch 31 being on), the RP operation plate 23 is set to the P23A position of the pressing position, and the FR operation plate 22 is set. Is moved to the position P22A. While the FR operation plate 22 is located at the position P22A, the FR operation plate 22
The gear plate 24 also moves in the DOA direction, and turns on a high-speed switch (not shown) for rotating the motor 1 at high speed.

In the above-described operation state, the motor 1 is driven to rotate clockwise, so that the rotation lever 5 is rotated to the P5C position, and the meshing state of each gear of the gear drive unit is the fast-forward state in the FW mode described above. Will be the same as In the state set as described above, the magnetic tape is rapidly wound around the reel on the FW reel shaft 14 side, and the cue operation is performed.

Further, in order to perform the cue / review operation in the RV mode, as shown by a two-dot chain line in FIG.
The operation plate 21 is moved to the position P21B to set the RV mode, and the RP operation plate 23 is moved to the position P23A. The pinch roller 35 is in contact with the capstan 3 with a magnetic tape interposed therebetween, and the magnetic recording / reproducing head 34 is also extended to a position where the magnetic recording / reproducing head 34 is in sliding contact with the magnetic tape, so that the RV side can be reproduced.

When the FR operation plate 22 is moved to the position P22B, a cue operation is performed. That is, DIR
Since it has moved to the switch support shaft 21a 'of the operation plate 21, the contact piece 31b side of the changeover switch 31 is turned on, and the motor 1 is driven to rotate counterclockwise. The rotating lever 5 is rotated to the P5D position shown in FIG. 4, and the meshing state of each gear of the gear driving unit is the same as the above-described fast forward in the RV mode or the rewinding state in the FW mode. In the state set as described above, the magnetic tape is moved to the RV reel shaft 16.
The reel is wound at high speed on the side reel, and a cue operation is performed.

When the FR operation plate 22 is moved to the position P22A, a review operation is performed. That is, DIR
When the FR operation plate 22 is at the position P22A, the contact piece 31a of the changeover switch 31 is turned on, and the motor 1 is driven to rotate clockwise. The rotating lever 5 is rotated to the P5C position shown in FIG. 4, and the meshing state of each gear of the gear driving unit is the same as the rewinding in the RV mode or the fast-forwarding state in the FW mode. In the state set as described above, the magnetic tape is rewound on the reel on the FW reel shaft 14 side at a high speed, and a review operation is performed.

In the fast-forward / rewind operation and the cue / review operation, the floating gears 11 and 12 for transmitting the tape feeding driving force are connected to the reel shafts 14 and 16 by the F gear.
W and RV are meshed with the reel gear 14a or 16a, and drive the reel shaft without passing through the slip mechanism 19b, so that the feed drive with high torque is possible.

Next, the switching process in the gear drive unit in the switching operation from the magnetic tape feeding operation such as the fast forward / rewind or cue / review operation to the recording / reproducing operation in the magnetic recording / reproducing apparatus will be described in detail. Will be described. In this magnetic recording / reproducing apparatus, gear switching at the time of the switching operation is performed at the following timing. That is, the PF switching plate 8 is moved from the position P8A to the position P8B.
When moving to the position, first, the FW, RV floating gear 11,
Twelve meshing states with the FW and RV reel gears 14a and 16a are released.

When the rotation of the motor 1 is not switched, the stopper 5a or 5b of the rotating lever 5 is pressed by the contact portion 8d of the PF switching plate 8 to rotate the rotating lever 5. FW or RV intermediate gears 9, 10 and FW or RV switching gear 6,
Release the engagement with 7. When switching the rotation of the motor 1, the power switch 32 and the changeover switch 31 are turned off first. Then, when the PF switching plate 8 moves to the position P8B in this state, the rotation of the motor 1 starts, and the rotating lever 5 rotates. And FW or
The RV switching gears 6, 7 are engaged with the FW or the RV reel gears 15, 17.

The reason why the above-described gear switching timing is adopted will be described with respect to the gear system on the FW side, but the same can be said for the gear system on the RV side. P
When the F switching plate 8 is returned to the P8B position, the rotary lever 5 moves while being driven to rotate.
Is connected to the motor 1 via the capstan pulley 2 and does not easily rotate unless the switching gears 6 and 7 are rotated. Therefore, in the return stroke of the PF switching plate 8, the FW and RV switching gears 6, 7 are returned while rotating.

When the rotating lever 5 starts rotating in the return stroke, if the floating gear 11 constantly meshing with the intermediate gear 9 meshes with the reel gear 14a, the PF
The rotation of the FW switching gear 6 in the return stroke of the switching plate 8 causes the reel gear 14a to rotate via the FW intermediate gear 9 and the FW idle gear 11. Assuming that the state of the magnetic tape at that time has reached the tape end, the reel gear 1 may be further wound.
4a and the switching gear 6 cannot be rotated.
As a result, the PF switching plate 8 cannot completely reach the P8B position and cannot be switched.

In order to prevent the occurrence of the above-mentioned state in which the gear cannot be switched, the apparatus of the present embodiment employs the reel gear 1 before the rotation lever 5 starts rotating as described above.
Gear switching is performed at such a timing as to release the engagement of the floating gear 11 with the floating gear 4a.

Further, the switching gear 6 has a reel gear 15
The rotation lever 5 continues to rotate while the switching gear 6 rotates even after meshing with the reel gear 1.
5 is driven to rotate. This direction is the direction in which the magnetic tape is wound. If the magnetic tape has reached the tape end at that time, the reel gear 15 may not be able to rotate.

However, since the reel gear 15 has a structure for driving the reel shaft 14 via the slip mechanism 19b as described above, the reel gear 15 can be rotated if driven by overcoming the slip resistance. In this way, the PF switching plate 8 can completely return to the P8B position. However, the driving force of the slip mechanism 19b is a load in the return stroke.

Further, in the cue / review operation, when the tape end has arrived, a strong force acts on the tooth surface of each gear, but considering the supporting position of the floating gear 11,
The free movement 11 is displaced in a direction to escape from the reel gear 14a, and the PF switching plate 8 receives the force on the side surface. This force becomes a load in the return stroke of the PF switching plate 8. The force for operating the PF switching plate 8 must be greater than those loads. However, if this force is too large, inconveniences such as deterioration of operation feeling and durability occur.

Therefore, in the apparatus of the present embodiment, the amount of operation force is reduced by shifting the timing at which a load occurs. That is, in the return stroke of the PF switching plate 8 in the switching operation from the cue or the fast-forward operation to the recording / reproducing operation, as described above, the engagement of the floating gear 11 is first released, and then the rotation lever 5 is returned. Is started, and the timing at which the engagement between the switching gear 6 and the intermediate gear 9 is released is taken.

When switching from the review rewinding operation to the recording / reproducing operation, the power switch 32 is turned off, the switch 31 is turned off, and the switching gear 6 is brought into mesh with the reel gear 15. Is turned off, the rotational force of the motor 1 is eliminated, and the load acting on the lateral pressure of the PF switching plate 8 is eliminated. Then, the load caused by the engagement with the reel gear 15 is actuated. To reduce the total load peak.

As described above, according to the tape feed drive mechanism of the magnetic recording / reproducing apparatus of this embodiment, the switching of the running direction of the tape can be performed simply by operating the switch 31. For example, when the present invention is applied to a magnetic recording / reproducing apparatus of an auto-reverse system, it is not necessary to perform a complicated gear drive system switching operation as in a conventional apparatus. Accordingly, the driving mechanism itself has a simple configuration, and the size of the apparatus can be reduced. In addition, since the automatic reverse switching is performed by the rotational force of the motor 1 and the mechanism is simplified, the amount of power is reduced, and a small motor can be applied, which is advantageous for miniaturization and power reduction.

Further, when the tape feed drive mechanism itself switches the gear system between the fast-forward / rewind state and the recording / reproduction state, the stopper 5a of the drive lever 5,
Alternatively, by simply moving the position 5b, switching can be performed later according to the rotation direction of the motor, so that the structure is simplified and moreover, reliable switching can be performed.

[0064]

As described above, according to the magnetic recording / reproducing apparatus of the first aspect of the present invention, switching to high-speed feeding and switching of the tape running direction can be performed by a simple mechanism.

According to the magnetic recording / reproducing apparatus of the second aspect of the present invention, the structure can be simplified and the occupied space can be reduced by applying the structure in which the floating gear is supported by the elastic member. be able to.

According to the magnetic recording / reproducing apparatus according to the third aspect of the present invention, by making the gears of the two gear trains have the same shape, the structure is simplified and the parts can be shared. .

[Brief description of the drawings]

FIG. 1 is a layout diagram showing a stopped state of a tape feed drive mechanism of a magnetic recording and reproducing apparatus according to an embodiment of the present invention.

FIG. 2 is a layout diagram showing a recording / reproducing state of a tape feeding drive mechanism of the magnetic recording / reproducing apparatus of FIG. 1;

FIG. 3 is an arrangement diagram showing a rewinding state of a tape feeding drive mechanism of the magnetic recording and reproducing apparatus of FIG. 1;

FIG. 4 is a layout diagram showing a cue / review state of a tape feeding drive mechanism of the magnetic recording / reproducing apparatus of FIG. 1;

FIG. 5 is a longitudinal sectional view of an operation unit of the magnetic recording / reproducing apparatus of FIG. 1;

FIG. 6 is an exploded perspective view around a rotary lever / PF switching plate of a gear drive unit of the magnetic recording / reproducing apparatus of FIG. 1;

FIG. 7 is a longitudinal sectional view of a gear driving unit of the magnetic recording / reproducing apparatus of FIG. 1 around a reel axis;

FIG. 8 is a perspective view of a changeover switch and a switch actuator of an operation unit of the magnetic recording and reproducing apparatus of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Motor 3 ... Capstan 4 ... Capstan gear 5 ... Rotating lever (rotating member) 5a, 5b ... Stopper part 6 ... FW switching gear (one first intermediate gear) 7 ... RV switching gear (the other first gear) Reference numeral 9: FW switching gear (switching member) 8d: Contact portion 9: FW intermediate gear (one second intermediate gear) 10: RV intermediate gear (the other second intermediate gear) 11: FW Floating gear (one floating gear) 12... RV floating gear (the other floating gear) 13a, 13b... Arms (elastic member) of gear support plate 14a. (One reel shaft) 14a ... FW reel gear (one first reel gear) 15 ... FW reel gear (one second reel gear) 16 ... RV reel shaft (other reel shaft) 16 a RV reel gear (the other first reel gear) 17 RV reel gear (the other second reel gear) 19b slip mechanism

Claims (3)

[Claims] A first reel shaft having one first reel gear; a second reel shaft provided at a distance from the one reel shaft and having the other first reel gear; One second reel gear connected to the other reel gear via a slip mechanism; and the other second reel gear connected to the other first reel gear via a slip mechanism. A capstan having a capstan gear that is driven to rotate, a turning member that is turned following the rotation direction of the capstan, and a turning member provided with a stopper portion, and is rotatably supported by the turning member, One first intermediate gear meshed with the capstan gear; the other first intermediate gear rotatably supported by the rotating member and meshed with the capstan gear; Has a contact portion capable of contacting the stopper portion of the serial rotary member,
A switching member for moving the contact portion to a different position between recording and reproduction of the magnetic tape and high-speed feeding; one second intermediate gear rotatably supported at a predetermined position; and a rotation at a predetermined position. A second intermediate gear movably supported, and a position meshed with the one second intermediate gear and meshed with the one first reel gear in conjunction with movement of the switching member. One floating gear that moves to a non-meshing position, meshes with the other second intermediate gear, and meshes with a position meshed with the other first reel gear in conjunction with the movement of the switching member; And the other idler gear that moves to a position not to be moved, and during a recording / reproducing operation, one or another via a capstan gear and one or the other of the first intermediate gear and the second reel gear. To rotate the other reel shaft, during fast feed operation, whereas a capstan gear,
Alternatively, a magnetic recording / reproducing apparatus characterized in that one or the other reel shaft is rotated via the other first intermediate gear, second intermediate gear, idle gear, and first reel gear. 2. The floating gear is supported by an elastic member,
2. The magnetic recording / reproducing apparatus according to claim 1, wherein the magnetic recording / reproducing apparatus is urged in a direction away from the first reel gear. 3. The one and other first intermediate gears, the one and the other second intermediate gears, the one and the other first reel gears, the one and the other second reel gears, the one and the other. 3. The magnetic recording / reproducing apparatus according to claim 1, wherein the other floating gears have the same gear shape between one and the other.