JPH0538419Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an auto-reverse tape recorder equipped with a forward return mechanism that returns to the forward side in response to a stop operation.

(Prior art and its problems) Auto-reverse tape recorders are usually designed to start recording or playback from the forward side. Therefore, a typical auto-reverse tape recorder is configured to switch the tape running direction to the forward side in conjunction with a stop operation, or in conjunction with a recording or playback operation, regardless of the tape running direction. .

By the way, there are various methods for changing the tape running direction in an auto-reverse tape recorder, such as one that electrically controls a plunger and one that uses a cam disk rotated by a motor. As shown in Utility Application No. 60-60450, which was filed by the same person, the switching gear that controls switching of the mechanism for switching the tape running direction to each tape running direction has an oscillating motion depending on the rotating direction of the motor. This is effective in a mechanism in which the tape running direction is switched by selectively meshing gears.

In other words, in this type of tape running direction switching mechanism, when a stop operation is performed in the reverse state, when returning to the forward side, the oscillating gear for switching the tape running direction engages with the switching gear during its return operation. Therefore, there is a danger that the return operation from the reverse state to the forward state may not be carried out smoothly, and a solution to this problem has been desired.

(Purpose of the invention) In an auto-reverse tape recorder that eliminates the above-mentioned drawbacks and returns the tape running direction to the forward side in connection with a stop operation, the tape running direction switching mechanism The purpose is to prevent this from becoming a load and interfering with the return operation.

(Summary of the invention) A control lever that switches the drive system including the pinch roller etc. according to the tape running direction is connected to a pair of switching gears for moving in each tape running direction.
A tape running direction switching mechanism that switches the tape running direction by selectively engaging an oscillating gear that swings in accordance with the rotational direction of the motor, and a stop operation is performed in the reverse state. , in an auto-reverse tape recorder equipped with a forward return mechanism that switches the tape running direction to the forward side in connection with a stop operation, when the forward return mechanism operates, the oscillating gear of the tape running direction switching mechanism is switched. This is a novel auto-reverse tape recorder in which the tape running direction switching mechanism is separated to a position where it does not mesh with any of the gears, so that it does not become a load on the forward return operation and prevent it.

(Example) Figure 5 is a plan view of the tape recorder of the present invention.
On the chassis 1, there are left and right reel stands 2a, 2.
b. Capstans 3a and 3b are rotatably provided to which flywheels 31a and 31b shown in FIG.

Chassis 1 between capstans 3a and 3b
A head chassis 6 on which the magnetic head 5 is placed is arranged above so as to be slidable back and forth through long holes 6a, 6b, pins 7, and positioning pins 4b, and is always biased downward by a spring (not shown). ing.

Chassis 1 facing capstans 3a and 3b
On the top, pinch roller levers 8a and 81b, respectively, are rotatably attached to pinch rollers 81a and 81b.
8b is rotatably attached to shafts 9a and 9b and biased toward the capstan by springs 10a and 10b. Engagement pins 82a and 82b that can engage with engagement slopes 191a and 191b on both ends 19 of the head chassis 6 are formed on the lower surfaces of the pinch roller levers 8a and 8b, respectively.

A play lever 62 is located on the rear edge of the head chassis 6.
are integrally formed, and the upper side edge is provided with a pulley 11 for switching the tension of the belt between the play mode and the high-speed transfer mode and an engaging protrusion 65 for controlling the reel stand drive mechanism. It is arranged so as to be located below the chassis than 1a and 1b.

Fast forward to the left when looking at the headshield 6 diagram.
Rewind levers 12 and 13 are arranged so as to be slidable back and forth, respectively, and a stop lever 14 is arranged in an overlapping state on the upper surface of the fast-forward lever.

On the chassis 1 where each operating lever and the head chassis 6 are arranged, a lock lever 16 for locking these levers in the operating position is provided with elongated holes 16a, 1.
6b and shafts 9a and 17 so as to be slidable left and right, and biased to the left in the figure by a spring 18.

The lock lever 16 includes a protrusion 161 that engages with an engaging pawl 64 formed on the head chassis 6 to lock its forward position, a protrusion 121 formed on the fast forward and rewind levers 12 and 13, respectively;
Engagement pawl 16 that engages with and locks 131
2,163, engagement slope 14 of stop lever 14
1 are respectively formed. These locking and unlocking operations are well known and will not be explained in detail. However, by pressing each operating lever upward as shown in the figure, its operating position is locked by the locking lever 16, and the stop lever 14 is locked. By pressing , the lock lever 16 can be slid to the right and the operating lever can be unlocked.

Also, to explain the configuration for switching the pinch roller lever according to the tape running direction, on the bottom surface of the chassis, there are engagement slopes 191a at both ends that engage with engagement pins 82a and 82b of pinch roller levers 8a and 8b, respectively. As shown in FIG.
a, 19b and shafts 20a, 20b so as to be movable left and right.

The control lever 19 can be selectively moved to the left and right positions by a reversing spring 22 disposed between the control lever 19 and the chassis 1.

When the control lever 19 moves to the left as seen in FIG. 5, the movement of the pinch roller lever 8a is restricted by the engagement slope 191a at the left end, and the pinch roller 81a becomes unable to press against the capstan 3a. , the pinch roller lever 8b is in a state where it can press the pinch roller 81b against the capstan 3b, and forward travel is possible.

Furthermore, when the control lever 19 moves to the right in the figure, the engagement slope 191b at the right end restricts the movement of the pinch roller lever 8b, and the pinch roller 81a is unable to press against the capstan 3b. At the same time, the pinch roller 81a comes into pressure contact with the capstan 3a, and reverse travel becomes possible.

In FIG. 5, reference numeral 23 denotes a lever for switching the tape running direction to the forward direction in conjunction with the stop operation, and is rotatably attached to the chassis 1 by a pin 24, and has a long hole 1c in the chassis 1 at one end. A notch 231 that engages with the pin 193 of the control lever 19 that protrudes further is provided at the other end, and an engagement pin 232 that can engage with the tip of the lock lever 16 is provided at the other end.

Therefore, when the lock lever 16 is moved to the right by the stop lever 14 or an automatic stop mechanism (not shown), the tip of the lock lever 16 is moved to the right by the stop lever 14 or an automatic stop mechanism (not shown).
32 is pressed to rotate the lever 23 counterclockwise, thereby moving the control lever 19 to the left position, which is the forward running state.

Further, the forward return operation described above is performed not only by the movement of the lock lever 16 but also by the return operation of the head chassis 6 from the reproduction position to the stop position.

That is, when the stop lever 14 and the lock lever 16 are moved in the release direction by an automatic stop mechanism (not shown), a sufficient stroke of the lock lever 16 can be obtained, so that the lever 2 can be reliably moved.
3 to return the control lever 19 to the forward side. However, if the lock lever 16 moves slightly due to a shock such as a fall, and only the head chassis 6 returns to the stopped position. cannot be returned to the forward side.

Therefore, an L-shaped lever 25 is rotatably mounted on the chassis 1 by a shaft 26, and when the head chassis 6 descends from the playback position to the stop position, a pin 63 on the head chassis 6 presses one end of the lever 25. The control lever 19 can be returned to the forward position by rotating it clockwise and pressing the pin 194 of the control lever 19 to the left when viewed in the figure with the other end of the lever 25. It is configured as follows.

On the other hand, on the chassis 1 in front of the head chassis 6, there is a switch _S1 that is closed when the head chassis 6 moves forward and turns the motor M into an energized state. There are also switches S _{1 and S} on the chassis 1 in front of the fast forward and rewind levers 12 and 13. ₂ , a switch Sf that switches the rotation of the motor M in the direction according to the mode, regardless of the mode;
A switch _S3 made of Sr is provided.

Therefore, when performing fast forward or rewind operations,
By pressing the fast forward and rewind levers 12 and 13, the switches Sf and Sr are closed, and the motor M is rotated clockwise and counterclockwise, respectively (the mechanism will be described later), and playback is performed. When performing the operation, move the head chassis 6 forward,
Close switch _S1 , energize motor M, and rotate it in the direction corresponding to the tape running direction set by switch _S2 (always in the forward running direction when performing playback from a stopped state). I can do it.

In the playback state, the tape running direction can be reversed by pressing the fast forward and rewind levers 12 and 13 to switch the rotational direction of the motor M. That is, the fast forward lever 12 and the rewind lever 13 can be operated as tape running direction control levers in the reproduction state. The details will be described later.

1 to 4 show the reel stand drive system arranged below the chassis 1, and the capstan 3b.
A motor M is attached above, a motor pulley 27 attached to the rotating shaft of the motor M, both flywheels 31b and 13a, and a head chassis 6.
A pulley 11 attached to the belt B is connected to the pulley 11 by a belt B. And to switch the tape running direction,
This can be done by reversing the direction of rotation of the motor M.

In addition, when the head chassis 6 is in the rear position where the magnetic head 5 is separated from the tape (not shown), the pulley 11 comes into deep pressure contact with the belt B to increase the tension of the belt B and also to push the belt B toward the motor pulley 27. This acts to increase the winding angle of the reel and the torque transmitted to the reel stand (Figs. 3 and 4). On the other hand, when the head chassis 6 is in the forward position where the magnetic head 5 is in pressure contact with the tape, it moves in the direction away from the belt B, weakening the tension, and reducing the winding angle around the motor pulley 27 to reduce the load. Figures 1 and 2).

That is, in the reproduction mode in which the head chassis 6 moves forward, the tape is transported at low speed and by the capstan, so the driving torque of the reel stand may be small. Therefore, the drive transmission torque from the motor is reduced to reduce the motor load and reduce power consumption.

On the other hand, in the high-speed transfer mode in which the head chassis 6 is retracted, the tape must be transferred at high speed only by the reel stand, which requires a larger driving torque than in the playback mode. Therefore, the winding angle of the belt is increased to increase the drive transmission torque and ensure the tape winding operation.

A sub-chassis 100 (shape not shown) for arranging a reel stand drive system is provided below the chassis 1, and the shafts provided on the chassis 100 are indicated by diagonal lines in the figure.

A gear 28 that rotates integrally with the capstan 3a
is attached, and above it is a drive gear 29 having a gear 291 formed on its outer periphery that constantly meshes with the gear 28.
is rotatably arranged around a shaft 30 on the chassis 100.

The drive gear 29 is further provided with gears 292 and 293 on the inner side of the outer periphery and at its rotation center.
A friction member (not shown) is interposed between the gear 293 and the gear 293 at the center of rotation.

In the figure, 21a and 21b are reel stands 2, respectively.
A gear attached integrally with a and 2b, gear 2
On the left side of 1b, gears 32 and 33 for rotation transmission are sequentially meshed with gear 21b, and shaft 3 is connected to the left side of 1b.
4,35.

An actuating plate 36 constituting a reel stand drive system is rotatably attached to the rotating shaft 35 of the gear 33.

A gear 37 is rotatably mounted on the actuating plate 36 by a shaft 38, and is configured to selectively engage gears 292 and 293 by rotating the actuating plate 36. A lever 39 is rotatably disposed coaxially with the gear 37, and a pair of planetary gears 40 are provided at both ends of the gear 37, which are always in mesh with the gear 37.
a and 40b are rotatably arranged. Furthermore, gear 4
A friction member 41 is disposed between Oa (or 40b) and lever 39, and is configured so that planetary gears 40a and 40b rotate around the rotational direction of gear 37.

Further, the actuating plate 36 is always biased clockwise by the spring 42, that is, in the direction of meshing the gear 37 with the gear 292, and when the head chassis 6 advances to the regeneration position, the actuating plate 36 is biased by the engaging protrusion 65. A leaf spring 361 attached to the actuation plate 36 is pressed and rotated counterclockwise against the spring 42,
The gear 37 is brought into mesh with the gear 293.

The rotation shaft 30 of the drive gear 29 has a lever set 43.
is rotatably attached, and a gear 4 is attached to its free end.
4 is disposed in such a manner that it is always in mesh with the gear 293. Further, a friction member 45 is disposed between the lever 43 and the gear 293, and a friction member 45 is arranged between the lever 43 and the gear 293.
The gear 44 is configured to oscillate in accordance with the direction of rotation. And swing gear 44
The range of movement is regulated by an arcuate hole 101 formed on the chassis 100 and the rotating shaft 46 of the gear 44.

Gear portions 471 are partially provided on the bottom surface of the chassis 100 at both ends of the movement range of the oscillating gear 44.
Switching gears 47a and 47b formed with a and 471b
are rotatably attached by shafts 48a, 48b, and on the opposite side of the gear portions 471a, 471b, engagement pins 472a, 472b protrude upward from the long holes 102, 103 of the chassis 100. It is formed by a relationship of

Chassis 1 between switching gears 47a and 47b
00, an approximately Y-shaped operating lever 49 is rotatably arranged around a shaft 50. In the notches formed at the tips of the legs 49a and 49b, there is provided a switching gear 4 that protrudes from the elongated holes 102 and 103.
The engagement pins 472a and 472b of the legs 7a and 47b are engaged, and the cut-and-raised piece at the tip of the leg 49c is engaged with the notch 192 of the control lever 19.

Therefore, by controlling the rotation of the switching gears 47a and 47b by the oscillating gear 44, the operating lever 49 can be swung to move the control lever 19 to the left or right, thereby switching the tape running direction. can.

The operating lever 49 is swung by rotating the switching gears 47a, 47b with the oscillating gear 44, and the switching gear alternately rotates its gear portions 471a, 471b, 471b, is configured to move along the movement locus of the oscillating gear 44.

Here, the gear portion 47 of each switching gear 47a, 47b
1a, 471b, operating lever 49, swing gear 4
The relationship 4 will be explained in detail.

The switching gears 47a, 47b are designed to rotate in conjunction with the operating lever 49 in the same direction, and as shown in FIG. When the switching gears 47a and 47b are swung clockwise, the gear portion 471a of the switching gear 47a is disengaged from the movement trajectory where it does not engage with the oscillating gear 44, and the gear portion 471a of the switching gear 47b
1b is positioned on a movement trajectory that can be engaged with the oscillating gear 44, and as shown in FIG.
When a and 47b are swung counterclockwise,
The gear portion 471a of the switching gear 47a is the oscillating gear 4
4, and the gear portion 471b of the switching gear 47b is configured to be moved out of the movement trajectory where it does not engage with the oscillating gear 44.

On the other hand, the gear portion 471 of the switching gears 47a, 47b
a and 471b are not provided to correspond to the entire movement range of the control lever 19, and after they are rotated in mesh with the swing gear 44, they are at a position where they do not mesh with the swing gear 44. It is now moved automatically.

That is, when the control lever 19 is moved more than half of its moving distance, the reversing spring 22 automatically moves the control lever 19 to a switching position corresponding to the direction of movement. Therefore, the gear portions 471a, 471b of the switching gears 47a, 47b need only be formed within a range necessary to rotate the operating lever 49 until the reversing spring 22 of the control lever 19 acts. When the switch gears 47a and 47b are rotated in the rotating direction by the reversing spring 22, the switching gears 47a and 47b are rotated in the rotating direction via the actuating lever 49, and the switching gear meshed with the oscillating gear 44 is rotated. The meshed state is released, and the unmeshed switching gear is moved onto the movement trajectory of the oscillating gear 44. As a result, the next time the rotation direction of the drive gear is reversed and the oscillating gear 44 approaches,
The control lever 19 can be switched by meshing with a switching gear having a gear portion facing the movement locus and rotating the operating lever 49 in the opposite direction.

By repeating the above operations, the states shown in FIG. 1 and FIG. 2 can be selectively achieved depending on the tape running direction.

Further, the actuation plate 36 and the lever 43 are respectively formed with engaging arms 362 and 431, and in particular, the second
When a stop operation is performed from the reverse running state shown in the figure and the head chassis 6 moves from the regeneration position to the stop position and the actuating plate 36 rotates clockwise, the lever 43 is rotated clockwise by the engaging arm 362. The gear 44 is rotated to forcibly separate the gear 44 from the switching gear 47b.

A similar operation can also be performed by pressing the stop lever 14.

That is, there is a lever (operating member) on the chassis between the stop lever 14 and the lever 43.
With 51 and 52 engaged at one end, the shaft 5
3 and 54, and the other end of the lever 52 has a protrusion 43 at the free end of the lever 43.
An engaging portion 521 that engages with the lever 5 is formed.
At the other end of 1 is an engagement protrusion 1 of the stop lever 14.
42, and the lever 51 is normally rotated counterclockwise by the spring 55.
The levers 52 are each biased clockwise and held in the position shown by a pin 56.

When the stop lever 14 is pressed, the lever 52 is moved by the spring 55 via the lever 51.
The engaging portion 521 rotates counterclockwise against the
By rotating the lever 43 clockwise, the oscillating gear 44 is forcibly separated from the switching gear 47b. These are all designed to ensure a smooth return from the reverse state to the forward state when a stop operation is performed in the reverse state or when the head chassis 6 returns to the stop position. will be described later.

The drive mechanism of the tape recorder of the present invention is constructed as described above, and its operation will now be explained step by step.

From the stop state shown in FIG. 5, the play bar 62
By pushing forward the head chassis 6, the magnetic head 5 comes into pressure contact with the tape (not shown) and enters the reproduction mode shown in FIG. 1 (forward running state). At the same time, the forward position of the head chassis 6 is held by the lock lever 16, the switch _S1 is closed, and the motor 25 is energized.

Further, by separating the engaging portions 61a, 61b at both ends, the pinch roller levers 8a, 8b become free, and the tape running direction is switched to the direction set by the lever 19. Since the control lever 19 is switched to the forward running direction, that is, to the left, by the stop operation before the play operation, the pinch roller 81b is moved toward the capstan 3b.
The tape is brought into pressure contact with the tape so that the running direction of the tape becomes the forward direction shown in FIG.

In this state, the motor 25 is controlled by switch _S2 .
are rotated counterclockwise, and the flywheels 3a,
3b are also rotated in the same direction.

The drive gear 29 rotates clockwise, the oscillating gear 44 is moved clockwise, that is, toward the switching gear 47a, and the sled rotation position is maintained by the left end of the arcuate hole 101, but the operating lever 49 is swung clockwise, and since the gear 471a of the switching gear 47a is removed from the movement locus of the oscillating gear 44, no rotation is transmitted to the switching gear 47a. In addition, the switching gear 47b has a gear portion 471b that is connected to the oscillating gear 44.
, and is held in a position where it meshes with the oscillating gear 44 when the direction of rotation of the drive gear 29 is reversed and the oscillating gear 44 moves to the right.

On the other hand, as the head chassis 6 moves forward, the actuating plate 36 is rotated counterclockwise against the spring 42.
The gear 37 is the smallest diameter gear 293 of the drive gear 29
is engaged and rotates counterclockwise. Therefore, the planetary gears 40a, 40b move counterclockwise around the gear 37 while rotating clockwise, and the gear 40b meshes with the gear 33 to rotate it counterclockwise. As a result, the reel stand 2b is rotated counterclockwise at a low speed via the gear 32, and the tape can be wound at a low speed.

In this state, by pressing the fast-forward lever 12 to close the switch Sf and reversing the rotational direction of the motor M clockwise, it is possible to switch to the reverse running state shown in FIG. 2.

When the rotation direction of the motor M is reversed clockwise, the rotation direction of the flywheels 31a and 31b is also reversed clockwise, and the drive gear 29 is rotated counterclockwise.

The oscillating gear 44 moves counterclockwise, that is, toward the switching gear 47b while rotating clockwise,
It meshes with the gear portion 47b of the switching gear 47b located on the movement trajectory. As a result, the switching gear 47b is rotated counterclockwise, and its engagement pin 4
The operating lever 49 is rotated counterclockwise by 72b. Therefore, the control lever 19 moves to the right, and the pinch roller 81b is moved to the capstan 3b.
At the same time, the pinch roller 81a is pressed against the capstan 3a to reverse the tape running direction. At the same time, switch _S2 is switched to set the motor and an electric circuit (not shown) to the reverse running state.

As described above, the gear portions 471a and 471b of the switching gears 47a and 47b are not formed over the entire rotation range, and are formed over half of the distance that the control lever 19 reaches its right switching position. Once moved, it disengages from the oscillating gear 44, and thereafter the actuating lever 49 is rotated counterclockwise by the movement switching operation by the reversing spring 22 of the control lever 19. Therefore, switching gear 4
7a and 47b are also rotated counterclockwise, and the gear portion 471b of the switching gear 47b that was meshed with the oscillating gear 44 is disengaged from the movement locus of the oscillating gear 44, and the switching gear 47b is moved from the gear 471a. moves into the movement locus of the oscillating gear 44, and enters a standby state for the next reversal operation.

On the other hand, the rotation direction of the gear 37 on the actuation plate 36 is also reversed clockwise, and the planetary gears 40a and 40b move to the left while rotating counterclockwise. As a result, the gear 40b separates from the gear 33, and the gear 40a meshes with the gear 21a of the reel stand 2a, causing it to rotate clockwise at a low speed.

After the above switching operation, the reverse running state shown in FIG. 2 is reached.

After that, operate the fast forward lever 12 and the rewind lever 13 to change the switches Sf and Sr, and turn the motor M.
The tape running direction can be switched by reversing the rotation direction of the tape. Note that when the fast forward lever 12 or the rewind lever 13 is pressed to perform a reversal operation from the forward or reverse travel state, the lock lever 16 for locking the fast forward lever 12 or the rewind lever 13 moves to the right. Because of this, lever operation is not locked. It goes without saying that an electrical circuit (not shown) can also be switched by well-known means in accordance with the switching operation of the tape running direction.

By pressing the stop lever 14 and sliding the lock lever 16 to the right in the above-described state, the head chassis 6 can be unlocked and brought into a stopped state. At this time, the control lever 19 is returned to the forward running state by the right movement of the lock lever 16.

When the head chassis 6 returns downward, the magnetic head 5 is separated from the tape (not shown), and the pinch roller levers 8a and 8b are also forcibly separated from the capstan by the engaging portions 61a and 61b of the head chassis 6. It will be in a stopped state.

The above is the tape running direction switching operation of the auto-reverse tape recorder of the present invention. Now, in the reverse state shown in FIG.
When the stop lever 14 is pressed to stop the product, or due to a shock such as falling during use, the stop lever 14
lock lever 1 even though you are not operating it.
A case where 6 moves in the release direction will be explained.

As shown in FIG. 2, in the reverse state, the lever 43 is rotated counterclockwise so that its gear 44 is closely opposed to the switching gear 47b. When the head chassis 6 returns to the stop position, the control lever 19 is moved in the forward direction by the pin 63 of the head chassis 6 and the lever 25 or lever 23, and the operating lever 49 is also rotated clockwise to switch. Gear 47b is rotated clockwise. However, in the stopping operation, motor M
does not reverse, the lever 43 does not swing clockwise, and the swing gear 44 does not move toward the switching gear 47a but engages with the switching gear 47b as it rotates. Therefore, the swing gear 4
4. The entire drive system, including the gear 293, that is, the drive gear 29, and the gear 28 of the capstan 3a, becomes a load on the switching gear 47b, and prevents the control lever 19 from returning to the forward side.

To solve this problem, when a stop operation is performed, specifically when the lock lever 16 moves in the release direction or when the head chassis 6 is returned from the playback position to the stop position, the lever 23 or 25 is activated. The control lever 19 is returned to the forward direction, but before this, the oscillating gear 44
is configured to be forcibly separated from the switching gear 47b to a position where it does not mesh with the switching gear 47b.

In the reverse state shown in FIG.
Although it faces 2, it is held in a position that does not interfere with its reverse side position. When the stop lever 14 is pressed in this state, the lever 52 is rotated counterclockwise via the lever 51, as shown in FIG. The swing gear 44 is forcibly separated to a position where it does not engage with the switching gear 47b.

On the other hand, in the reverse state, when the lock lever 16 moves in the release direction due to a shock caused by a fall or the like, and the head chassis 6 returns to the stop position, as can be seen from FIG. , actuation plate 36
rotates clockwise due to the elasticity of the spring 42, and its engaging arm 362 pulls up the engaging arm 431 of the lever 43 and rotates it clockwise, forcing the oscillating gear 44 to engage with the switching gear 47b. It is designed to be spaced apart in a position where it is not possible to do so.

Therefore, in the reverse state, either the operation of the stop lever 14 or the return of the head chassis 6 to the stop position immediately moves the oscillating gear 44 to a position where it does not mesh with the switching gear 47b. The forward return operation in the tape running direction accompanying the return to the stopped state is not hindered by the meshing of the gears 44, 47b, and the operation is always smooth and reliable.

In the above-described operation, the stop lever 14 is moved so that the operation of separating the oscillating gear 44 from the switching gear 47b is performed before the operation of returning the control lever 19 to the forward side by the lock lever 16 or head chassis 6. Appropriate play is provided between the engaging protrusion 142 and the protrusion 164 of the lock lever 16, between the lock lever 16 and the lever 23, and between the protrusion 63 on the head chassis 6, the lever 25, and the protrusion 194 on the control lever 19. It is being

Next, fast forwarding and rewinding operations will be explained.

3 shows a fast-forwarding state, and FIG. 4 shows a rewinding state. When the head chassis 6 retreats to a stop position where the magnetic head 5 is separated from the tape (not shown), the pulley 11 moves the belt 27. The rotational transmission torque is increased for high-speed transfer by being deeply pressed into contact with
It becomes in a state where it meshes with the large diameter gear 292 of No. 9.
Therefore, the gear 37 is set to rotate at a much higher speed than in the regeneration mode shown in FIGS. 1 and 2.

By pressing the fast-forwarding lever 12 in this state, the pressing position is locked and the switch Sf of the switch _S3 is closed, and the motor 25 is rotated clockwise by a control circuit (not shown).
The fast forwarding state shown in FIG. 3 is reached.

The drive gear 29 is rotated counterclockwise, and the gear 37 on the operating plate 36 is rotated counterclockwise. As a result, the planetary gears 40a, 40b are moved clockwise while rotating clockwise, and the gear 40b is meshed with the gear 33, and rotates the gear 21b of the reel base 2b counterclockwise at high speed via the gear 32.

In addition, in the above-mentioned fast forward mode, drive gear 2
9, the oscillating gear 44 moves to the right, that is, toward the switching gear 47b, but since the actuating plate 36 is rotated clockwise by the spring 42, the engaging arm 362 Therefore, the lever 43 is forcibly held in a position separated from the switching gear 47b, and is engaged with the switching gear 47b, so that the control lever 19
does not move to the reverse side.

In the above-mentioned state or the stop state, by pressing the rewind lever 13, the rewind mode shown in FIG. 4 can be established.

By pressing the rewind lever 13, the switch Sr of the switch _S3 is closed, the motor 25 is rotated counterclockwise, and the rotation direction of the drive gear 29 is also set clockwise. As a result, the gear 37 on the actuating plate 36 is rotated clockwise, and the planetary gears 40a,
40b moves to the left, and the gear 40a meshes with the gear 21a of the reel stand 2a. Therefore, the reel stand 2a is rotated at high speed and enters the rewind mode.

In addition, even in the rewind mode, the oscillating gear 44
moves leftward to a position close to the switching gear 47a, but since the control lever 19 is in the forward travel position and the switching gear 47a is also in a position where the gear portion 471a does not face the oscillating gear 44, As with the fast forward mode, there is no problem with high-speed tape transport operations.

No matter which direction high-speed feeding is performed, when the stop lever 14 or an automatic stop device (not shown) brings the stop state, the control lever 19 always moves to the left, which is the forward running position. Therefore, the next time the regeneration operation is performed, it can always be started in the forward running state.

(Effects of the invention) As described above, according to the auto-reverse tape recorder of the invention, a pair of capstans,
a pair of pinch rollers disposed opposite to each other so as to be able to freely approach and separate from these capstans, a control lever for selectively bringing each of the pinch rollers into pressure contact with each of the opposing capstans, and a pair of reel stands;
a driving means for selectively transmitting the rotation of the motor to the reel stand according to the rotational direction of the motor; a swinging means for swinging to the right or left according to the rotational direction of the motor via the driving means; An operating lever for controlling the control lever through the swinging means, and a switching means for switching the control lever to a normal position by means of a stop means. By selectively transmitting the rotation of the motor to the base and controlling the control lever via the driving means, swinging means and operating lever, the pinch rollers are brought into selective pressure contact with the respective opposing capstans to tape the tape. In a drive transmission mechanism for a tape recorder, the control lever is switched to a normal position via the switching means when the running direction is changed and a stop operation is performed by the stop means, and the control lever is switched to a non-normal position. If the tape running direction switching mechanism is changed, the tape traveling direction switching mechanism is configured to be provided with an actuating member that forcibly moves the swinging means away from the actuating lever in conjunction with the stopping operation, so that the tape running direction switching mechanism will not be affected by the load in response to the stopping operation. This gear changeover allows for smooth return to the forward direction with a light force without interfering with the return movement to the forward direction, and has a simpler configuration than electric control using a plunger or complicated cam operation type. The advantages of the type tape running direction switching mechanism can be fully utilized.

[Brief explanation of drawings]

Each of the figures shows an embodiment of the auto-reverse tape recorder of the present invention.
The figure is for explaining the structure and operation of the tape running direction switching mechanism, the mechanism for returning the tape running direction to the forward side in connection with the stopping operation, and the mechanism for simultaneously separating the oscillating gear from the switching gear for switching the tape running direction. 1 shows a forward running state, FIG. 2 shows a reverse running state, FIG. 3 shows a fast forwarding state, and FIG. 4 shows a rewinding state.
Fig. 5 is a plan view for explaining the headshaft, each operating lever and its locking mechanism, etc. Fig. 6 is a partial plan view for explaining the mechanism for separating the oscillating gear from the switching gear in response to a stop operation. be. Explanation of symbols, 2a, 2b...Reel stand, 3a,
3b... Capstan, 6... Headshashi,
8a, 8b... Pinch roller lever, 11... Pulley, 16... Lock lever, 19... Control lever, 23, 25... Lever (forward return member), 29... Drive gear, 36... Actuation plate, 40
a, 40b...planetary gear, 44...oscillating gear,
47a, 47b... switching gear, 49... operating lever, 51, 52... lever (actuating member).

Claims (1)

[Scope of utility model registration request] a pair of capstans, a pair of pinch rollers disposed so as to be able to freely approach and separate from these capstans, a control lever for selectively bringing each of the pinch rollers into pressure contact with each of the opposing capstans, and a pair of reel stands; a driving means for selectively transmitting the rotation of the motor to the reel stand according to the rotational direction of the motor; a swinging means for swinging to the right or left according to the rotational direction of the motor via the driving means; An operating lever for controlling the control lever through the swinging means, and a switching means for switching the control lever to a normal position by means of a stop means. By selectively transmitting the rotation of the motor to the base and controlling the control lever via the driving means, swinging means and operating lever, the pinch rollers are brought into selective pressure contact with the respective opposing capstans to tape the tape. In the auto-reverse tape recorder, the control lever is switched to a normal position via the switching means when the running direction is changed and a stop operation is performed by the stop means, and the control lever is switched to a non-normal position. An auto-reverse tape recorder characterized in that an actuating member is provided which forcibly moves the swinging means away from the actuating lever in conjunction with the stopping operation when the oscillating means is turned on.