JPS6143775B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a tape recorder and the like.

[Prior Art] By the way, as a conventional tape recorder of this kind, for example, the patent application 1972-
No. 150089 ``Auto-stop device for tape recorders, etc.'' and Patent Application No. 143906 of 1982 ``Tape recorder.''
In these conventional devices, the auto-stop sensor is installed coaxially with the reel stand, and while the tape is running, that is, the reel stand is rotating, the auto-stop sensor is connected to the reel stand. The rotation of the drum causes rotation and oscillation, but when the end of the tape is reached and the reel stand stops rotating, the rotation of the drum causes the auto-stop sensor to move linearly backwards, causing an auto-stop operation. However, the support mechanism for the auto-stop sensor on the underside of the reel table is complicated, and it is difficult to set the stroke of the backward movement for auto-stop operation.

[Object of the present invention]

The present invention was devised in view of the drawbacks of the conventional devices, and includes an auto-stop sensor that is pivotally supported on a support shaft that is different from the support shaft of the reel stand, and that prevents the reel stand from being rigid while it is rotating. The present invention aims to provide a tape recorder having a structure that allows the autostop sensor to rotate and oscillate even during autostop operation, and which has a simpler structure than conventional devices.

[Structure of the present invention] Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Among the accompanying drawings, FIG. 1 is a plan view showing the stop mode of the tape recorder according to the present invention, and FIG. 8 is a side cross-sectional view of the tape recorder taken along line A-A' in FIG. 1. It is a diagram.

In these figures, 1 is a main chassis, 2 to 5 are a stop operation lever, a rewind operation lever,
As a fast forward operation lever and a playback operation lever,
By inserting the guide shafts 1a to 1d protruding from the main chassis 1 through the guide holes 2a to 5a provided on the plate surface, respectively, the arrows B and The springs 16 to 19 are configured to be able to slide in the C direction and are suspended between the engagement pins 1n to 1q protruding from the main chassis 1 and the engagement pins 2c to 5c provided respectively. It is biased to remain in the inoperative position.

In addition, each of these operation levers is a stop operation lever 2.
have lock pins 3b to 5b, respectively, except for
Further, the stop operation lever 2 is provided with a release pin 2b.

Further, the regeneration operation lever 5 extends rearward longer than the other operation levers, and is provided with an engagement protrusion 5d on the lower surface of its rear end that engages with an actuation arm 13, which will be described later.

6 is a lock plate, and the guide hole 6 is provided on the plate surface.
a is inserted into the guide shaft 1e protruding from the main chassis 1, so that the main chassis 1 It is constantly biased in the direction of arrow E by a spring 15 suspended between the engaging pin 1m and the engaging pin 6i that protrude from each other.

This lock plate 6 has an inclined surface 6b that comes into contact with the release pin 3a of the stop operation lever 2, and a lock that locks the lock pins 3b and 4b of the rewind and fast forward operation levers to hold both levers in the operating position. 6c and 6d, and a locking portion 6e for locking the locking pin 5b of the regeneration operation lever to hold the lever in the operating position.

As is clear from the figure, the length of the lock edge of this lock portion 6e is set longer than that of the other lock portions 6c and 6d, and therefore, the length of the lock edge of this lock portion 6e is longer than that of the other lock portions 6c and 6d. At the same time, the fast-forward operation lever 4) locks the lock pins 5b and 3b, respectively.
(or 4b) to the corresponding lock portions 6e and 6c (or 6d) of the lock plate 6, the lock plate 6 is locked between the lock pin 3b (or 4b) and the lock portion 6c (or 6d). When the rewind or fast forward operation lever is slid in the direction of arrow D to the extent that it is released, the rewind or fast forward operation lever is unlocked, but the playback operation lever 5 is not unlocked and remains locked. Of course, it goes without saying that when the lock plate 6 is slid in the direction of arrow D to the position where the regeneration operation lever 5 is unlocked, all the operation levers are unlocked.

Further, this lock plate 6 is provided with a contact portion 6f at one end thereof, which comes into contact with a contact pin 7a of an auto-stop sensor 7, which will be described later.

Reference numeral 7 denotes the above-mentioned auto-stop sensor which is pivotally supported on the support shaft 1f of the main chassis 1 with its midsection, and has the above-mentioned abutment pin 7a on the lower surface of one end and a sliding protrusion 7b on the lower surface of the other end. On one side edge between the sliding protrusion 7b and the support shaft 1f, there is a cutout 7e that loosely fits into a take-up reel stand 11a, which will be described later.
and contact surfaces 7d located on both sides of the opening of the defective part.
and 7c.

8 is the rewind and fast forward operation levers 3 and 4.
A transmission rod provided on the main chassis 1 at the rear of the main chassis 1 can be slid in directions of arrows B and C by inserting a guide shaft 1g protruding from the main chassis 1 through a guide hole 8a provided on the plate surface. At the same time, it is always biased in the direction of arrow C by a spring 20 suspended between the engagement pin 8c and the engagement pin 1r provided on the main chassis 1, so that it remains in the non-operating position. The transmission rod 8 has a contact portion 8b at its front end that comes into contact with the rear end of the rewind and fast-forward operation levers 3 and 4, and an engagement notch 8d at the rear end. When the fast-forward operating lever 3 or 4 is in the non-operating position, it is in the most advanced non-operating position by the spring 20, but when the rewind or fast-forward operating lever 3 or 4 is operated and in the operating position, the contact portion 8b to be pushed by these levers and held in the retracted operating position.

Reference numeral 9 denotes an intermediate arm pivotally supported on a support shaft 1i on the main chassis 1 near the rear end of the transmission rod 8, and a transmission pin 9a provided at one end is engaged with an engagement notch 8d of the transmission rod. transmission rod 8
The operating arm 13, which will be described later, can rotate according to the sliding movement of the operating arm 13.
It is configured so that it can be rotated by being connected to and disconnected from it.

Reference numeral 10 designates an operating gear which is pivotally supported by a support shaft 13a at one end of a square-shaped operating arm 13 which is pivotally supported by a support shaft 1j of the main chassis 1, and has a cylindrical shaft center ( The auto stop sensor 7 is eccentric with respect to the support shaft 13a).
a swinging cam 10a that can slide into sliding contact with the sliding protrusion 7b;
The outer surface 10 is located radially outward from the swing cam 10a.
It is provided with an arc-shaped return cam 10b that can slide into sliding contact with the sliding protrusion 7b at an angle f.

The return cam 10b has its starting end 10e located near the minimum diameter part of the swing cam 10a, and its terminal end near the maximum diameter part 10d of the cam 10a, and as it goes from the starting end to the terminal end. The starting point 1 is formed so as to gradually move away from the axis.
The gap 10c between the inner surface of 0e and the minimum diameter part of the swing cam 10a is made sufficient for the sliding protrusion 7b of the auto-stop sensor 7 to pass through, and the gap 10c is made large enough for the sliding protrusion 7b of the auto-stop sensor 7 to pass through. The distance is set to be equal to or somewhat smaller than the distance (radius of curvature) from the axis of the maximum diameter portion 10d of the swing cam 10a.

The operating arm 13 has a support shaft 1j as described above.
The other end of the engagement pin 13b crosses the lower surface of the rear end of the regeneration operation lever 5 at a substantially right angle, and the engagement pin 13b is provided at the tip of the other end.
It is constantly urged to rotate in the direction of arrow F by a spring 21 suspended between the main chassis 1 and an engagement pin 1s protruding from the main chassis 1, and this urging force causes the other end side surface to be attached to the regeneration operation lever 5. The engagement protrusion 5d is brought into abutment engagement with the above-mentioned engagement protrusion 5d.

The actuating arm 13 rotates within the range between the regulating pins 1k and 1l provided on the main chassis 1 in conjunction with the operation of the regeneration operating lever 5, and rotates the actuating gear 10, which will be described later, pivoted at one end thereof. When the playback operating lever 5 is engaged with and disengaged from the gear 11 and the operating gear 10 is in mesh with the reel gear 11, that is, in the playback mode, the intermediate arm 9 moves in the direction of the arrow when the rewinding operating lever is operated. When it rotates in the F direction, it rotates in conjunction with this to disconnect the gears 10 and 11 from each other.

Furthermore, a driven pulley 12 having a gear portion 12a that meshes with the operating gear 10 on its upper surface is pivotally supported on the pivot shaft 1j that pivotally supports the operating arm 13. The belt 15 is moved from the drive pulley 14b attached to the motor shaft 14a of the drive motor 14 provided on the main chassis 1.
When the operating gear 10 is engaged with the reel gear 11 due to the rotation of the operating arm 13, the rotational force is transmitted to both gears 1.
The signal is transmitted to a take-up reel stand 11a, which will be described later, through 0 and 11, and the reel stand 11a is rotated at a constant speed, that is, at a low speed for the reproduction mode.

Now, the take-up reel stand 11a is pivotally supported on a pivot shaft 1h provided on the main chassis 1, and the reel gear is connected to the take-up reel stand 11a below the flange 11f provided in the midsection. 11 is inserted, and the reel gear 11 is brought into elastic contact with the flange 11f via the felt 11g by the urging force of the spring 31, which is compressed between the gear 11 and the receiving plate 11h attached to the lower end. gear 11
It is designed to rotate in response to the rotational force of.

Moreover, this take-up reel stand 11a has the above-mentioned flange 11f.
A slip plate 11c is inserted above the slip plate 11, and the slip plate 11 is moved by the force of a spring 30 compressed between the slip plate 11c and the flange 11f.
The rotation of the take-up reel stand 11a is transmitted to the slip plate 11c by elastically contacting the receiving plate 11b attached to the middle of the upper end via the felt 11e.

This slip plate 11c is provided with pressing protrusions 11d on the lower surface of both corner portions of the end,
This end is pivoted to the take-up reel stand 11a as described above so that it is located on the opposite side of the cutout part 7e of the auto-stop sensor 7, and as the take-up reel stand 11a rotates, the auto-stop sensor 7 and rotates the auto-stop sensor 7 in the direction of arrow F or G, and the sensor 7 is rotated in the direction of arrow G by the swing cam 10a or return cam 10b of the operating gear 10. When pushed back, it is pushed back in the direction of arrow G or F against the rotation of the take-up reel stand 11a.

[Operation of the present invention]

The present invention is constructed as described above,
Next, its effect will be explained.

(1) Regarding the stop mode; First, the stop mode will be explained based on Fig. 1.

In this stop mode, each operating lever 2 to 5 is in a non-operating position, so the drive motor 14 is not driven, and the operating arm 13 is pushed against the spring 21 by the engagement protrusion 5d of the regeneration operating lever 5. The operating gear 10 does not mesh with the reel gear 11 because it is at the position where it hits the regulating pin 1k (this position is referred to as the first position of the operating arm 13).

(2) Regarding mode switching from stop mode to playback mode; see Figure 2.

Now, in the stop mode as shown in FIG.
e, the regeneration operation lever 5 is held in the operating position, and in conjunction with this, the drive motor 14 starts driving and rotates the operating gear 10 in the direction of arrow F via the driven pulley 12 and gear portion 12a. let

On the other hand, as the regeneration operating lever 5 slides in the direction of arrow B, the operating arm 13
1, the operating gear 10 is rotated in the direction of arrow F to a second position where it hits the regulating pin 1l, and the operating gear 10 is brought into mesh with the reel gear 11.

Then, the meshing of both gears 10 and 11 rotates the take-up reel stand 11a in the direction of arrow G, and winds up a tape (not shown) at a constant speed.

Further, as the take-up reel stand 11a rotates, the auto-stop sensor 7 is activated by the pressing protrusion 11d of the slip plate 11c, which rotates in the same direction as the take-up reel stand 11a.
is rotated in the direction of arrow F via the contact surface 7c, and its sliding protrusion 7b is brought into sliding contact with the swing cam 10a. Thereafter, the auto-stop sensor 7 is rotated about the support shaft 1f as a fulcrum by the slip plate 11c and the swing cam 10a. That is, the auto stop sensor 7 is attached to the sliding protrusion 7b.
When the sliding cam 10a slides in the direction from the maximum diameter part 10d to the minimum diameter part, it is pushed by the pressing protrusion 11d of the slip plate 11c and rotates in the direction of arrow F, and the sliding protrusion 7b contacts the maximum diameter part 10d of the swinging cam 10a. When sliding from the small diameter portion to the maximum diameter portion 10d, the slip plate 11c is pushed by the swing cam 10a against the frictional force with the felt 11e and rotates in the direction of arrow G, and these rotations are repeated.

The rotation range of the auto-stop sensor 7 at this time is determined by the swing cam 10a and is small, and the contact pin 7a of the auto-stop sensor 7 is set so as not to contact the contact portion 6f of the lock plate 6. has been done.

The above is the reproduction mode, in which the tape is run at a constant speed as described above, and the magnetic head (not shown) slides on the tape to reproduce the recorded content.

Of course, it goes without saying that the above-mentioned members perform the same functions in the recording mode as in the playback mode.

(3) Regarding mode switching from playback mode to stop mode; For this mode change, there are two cases: when the tape reaches the end (in the former case), and when the stop operation lever is operated during playback mode. (the latter case).

Each case will be explained below.

In the former case See Figure 3.

In the playback mode as shown in FIG. Nevertheless, when the rotation of the reel gear 11 is stopped by the slip, the slip plate 11c also stops rotating and the pressing protrusion 1 of the slip plate 11c stops.
1d does not push the auto-stop sensor 7, so the auto-stop sensor 7 has a sliding protrusion 7b exactly as shown by the solid line in FIG. The rotation is temporarily stopped when it is pushed the most in the G direction.

Then, after that, the arrow F of the operating gear 10 is
When the rotation in the direction progresses and the starting end 10e of the return cam 10b comes to engage with the sliding protrusion 7b, the sliding protrusion 7b starts to come into sliding contact with the outer surface 10f of the return cam 10b, and accordingly the auto-switching starts. The top sensor 7 gradually begins to rotate in the direction of arrow G, causing the lock plate 6 to slide in the direction of arrow D via the contact pin 7a and the contact portion 6f of the lock plate 6, as shown in FIG.

That is, the auto-stop sensor 7 starts the auto-stop operation.

When the rotation of the operating gear 10 further progresses and the rear end of the return cam 10b, that is, the maximum diameter portion comes into contact with the sliding protrusion 7b, at this time,
Since the rotation of the auto-stop sensor 7 in the direction of the arrow G is also maximum, the sensor 7 slides the lock plate 6 most in the direction of the arrow D, so that the lock portion 6e of the lock plate 6 and the lock pin of the regeneration operation lever 5 are connected. 5b.

Therefore, as the regeneration operating lever 5 is unlocked, the lever 5 is returned to the non-operating position by the spring 19, and the lever 5 is
In response to this return, the operating arm 13 rotates in the direction of arrow G against the spring 21 and returns to the first position, while the engagement between the operating gear 10 and the reel gear 11 is released and the stop shown in FIG. mode.

Of course, the driving of the drive motor 14 is stopped in response to the return of the regeneration operation lever 5.
The timing is determined by driving an appropriate means (not shown) so that the rotation of the operating gear 10 stops when the maximum diameter portion 10d of the swing cam 10a opposes the sliding protrusion 7b of the auto-stop sensor 7, as shown in FIG. The rotation of the motor 14 is also stopped.

In the latter case, in the playback mode shown in Figure 2,
When the stop operation lever 2 is pushed in the direction of arrow B against the spring 16, the release pin 2b of the stop operation lever 2 hits the inclined surface 6b of the lock plate 6, causing the lock plate 6 to slide in the direction of arrow D. Therefore, the lock portion 6e of the lock plate 6 and the lock pin 5b of the regeneration operation lever 5 are unlocked.

Therefore, as the regeneration operation lever 5 is unlocked, the lever 5 is returned to the non-operating position by the spring 19 and the lever 5 is
In conjunction with this return, the operating arm 13 rotates in the direction of arrow G against the spring 21 and returns to the first position, while releasing the engagement between the operating gear 10 and the reel gear 11, as shown in FIG. It enters stop mode.

Of course, the driving of the drive motor 14 is stopped in response to the return of the regeneration operation lever 5.
The timing is the same as in the former case, and as shown in FIG.
d is the sliding protrusion 7b of the auto-stop sensor 7
The drive motor 1 is connected to the drive motor 1 by suitable means (not shown) so that the rotation of the operating gear 10 stops when it faces the
It is designed to stop the rotation of 4.

(4) Regarding mode switching from stop mode to fast forward mode; see Figure 4.

From the above-mentioned stop mode, when the fast-forward operation lever 4 is pushed in the direction of arrow B against the spring 18,
The lock pin 4b of the fast-forward operating lever 4 is locked to the lock portion 6d of the lock plate 6, and the fast-forward operating lever 4 is held in the operating position. The operating gear 10 is rotated in the direction of arrow F via the gear portion 12a.

Further, the reel gear 11 is rotated in the direction of arrow G by a high-speed drive mechanism (not shown) that is driven as the fast-forward operating lever 4 moves to the operating position. Therefore, the take-up reel stand 11a is also rotated at high speed in the same direction to wind up the tape at high speed.

At this time, since the regeneration operation lever 5 is in the non-operating position and the operating arm 13 is in the first position,
The operating gear 10 is not meshed with the reel gear 11. Further, as the fast-forward operation lever 4 slides, the transmission rod 8 moves backward in the direction of arrow B against the spring 20 and rotates the intermediate arm 9 in the direction of arrow F. However, as described above, when the actuating arm 13 1, the intermediate arm 9 does not exert any rotational force on the actuating arm 13.

Therefore, as mentioned above, the take-up reel stand 11a
As the slip plate 11c rotates at high speed, the slip plate 11c
are also rotated in the same direction, and the auto-stop sensor 7 is rotated in the direction of arrow F by the pressing projection 11d, so that the sliding projection 7b is brought into sliding contact with the swing cam 10a. Thereafter, this auto-stop sensor 7 is connected to the slip plate 11c and the swing cam 10a.
It rotates and oscillates around the support shaft 1f as the fulcrum.

In this case, at the beginning of the rotation of the slip plate 11c, the auto-stop sensor 7 is pushed by the slip plate 11c in the direction of arrow F, and the sliding protrusion 7b
The rotation stroke of the auto-stop sensor 7 until it comes into contact with the swing cam 10a is:
Since the operating gear 10 is not meshed with the reel gear 11, it is larger than in the above-mentioned regeneration mode, and therefore, the contact pin 9a is further away from the contact portion 6f than in the regeneration mode. . Of course, the reciprocating stroke of the swinging movement of the auto-stop sensor 7 after the sliding protrusion 7b once comes into sliding contact with the swinging cam 10a is determined by the amount of eccentricity of the swinging cam 10a, and is therefore the same as in the regeneration mode.

The above is the fast forward mode.

In addition, in the case of rewind mode, the take-up reel stand 11
The operation is basically the same as the fast-forward mode except that a rotates in the opposite direction to that in the fast-forward mode, and the auto-stop sensor 7 is pushed by the slip plate 11c with its abutting surface 7d to rotate and oscillate.

(5) Regarding mode switching from fast forward mode to stop mode; see Figure 5.

This mode switching is similar to switching from playback mode to stop mode, when the tape reaches the end (in the former case), and when the stop operation lever is operated during fast forward mode to switch to stop mode. (the latter case).

Each case will be explained below.

In the former case See Figure 3.

In the fast forward mode as shown in Figure 4 above,
When the tape is completely wound onto the reel (not shown) of the take-up reel stand 11a and the end of the tape is reached, the take-up reel stand 11a stops rotating.
Along with this, the slip plate 11c also stops rotating and the pressing protrusion 11d of the slip plate 11c no longer presses the auto-stop sensor 7. Therefore, despite the rotation of the operating gear 10, the auto-stop sensor 7 When the sliding protrusion 7b as shown by the solid line in FIG. 4 is pushed farthest in the direction of arrow G by the maximum diameter portion 10d of the swing cam 10a, the rotation is temporarily stopped.

Then, after that, the arrow F of the operating gear 10 is
As the rotation in the direction progresses, the starting end 1 of the return cam 10b
When Oe comes to engage with the sliding protrusion 7b,
This sliding protrusion 7b is located on the outer surface 10 of the return cam 10b.
As soon as the auto-stop sensor 7 begins to come into sliding contact with the lock plate 6, the auto-stop sensor 7 gradually starts to rotate in the direction of the arrow G, and as shown in FIG. slide in the direction of arrow D.

That is, the auto-stop sensor 7 starts the auto-stop operation.

When the rotation of the operating gear 10 further progresses and the rear end of the return cam 10b, that is, the maximum diameter portion comes into contact with the sliding protrusion 7b, at this time,
Since the rotation of the auto-stop sensor 7 in the direction of the arrow G is also maximized, the sensor 7 slides the lock plate 6 most in the direction of the arrow D, and the lock portion 6d of the lock plate 6 and the lock pin of the fast-forward operating lever 4 are connected. 4b.

Therefore, with the unlocking of the fast-forward operation lever 4, the lever 4 is returned to the non-operating position by the spring 18, and in conjunction with the return of the lever 4, the transmission rod 8 is moved by the spring 20.
As a result, both the intermediate arms 9 return to the operating position, and the stop mode shown in FIG. 1 is entered.

Of course, the driving of the drive motor 14 is stopped in response to the return of the fast-forward operation lever 4, but the timing is such that, as shown in FIG. The rotation of the drive motor 14 is stopped by an appropriate means (not shown) so that the rotation of the operating gear 10 is stopped at a position opposite to the sliding protrusion 7b of the drive motor 14.

In this case, the stroke in which the lock plate 6 slides in the direction of arrow D in order to release the lock according to the auto-stop operation of the auto-stop sensor 7 is smaller than that when switching from the playback mode to the stop mode.

That is, in the fast-forward mode, as described above, the auto-stop sensor 7 is rotated in the direction of the arrow F with a larger stroke than in the playback mode, and the contact pin 7a is in a position farther away from the contact portion 6f of the lock plate 6. Therefore, when the auto-stop sensor 7 is rotated in the direction of arrow G by the return cam 10b via the sliding protrusion 7b at this position,
The stroke by which the auto-stop sensor 7 slides the lock plate 6 in the direction of arrow D via the contact pin 7a is smaller than that in the regeneration mode. This is based on the fact that the lock edge length of the lock portion 6d of the lock plate 6 corresponding to the lock pin 4b of the fast-forward operation lever 4 is formed shorter than that of the lock portion 6e corresponding to the playback operation lever 4. This is the one that was set.

In the latter case, when the stop operation lever 2 is pushed in the direction of arrow B against the spring 16 in the fast forward mode as shown in FIG. Since the lock plate 6 is slid in the direction of arrow D, the lock portion 6d of the lock plate 6 and the lock pin 4b of the fast-forward operation lever 4 are unlocked.

Therefore, as the fast-forward operation lever 4 is unlocked, the lever 4 is returned to the non-operating position by the spring 18, and the lever 4 is
In conjunction with the return of
The system enters the stop mode shown in the figure.

Of course, the driving of the drive motor 14 is stopped in response to the return of the fast-forward operation lever 4, but the timing is the same as in the former case, and as shown in FIG. 1
0d is the sliding protrusion 7 of the auto stop sensor 7
The rotation of the drive motor 14 is stopped by suitable means (not shown) so that the rotation of the operating gear 10 is stopped at a position opposite to the point b.

Note that the mode switching from the rewind mode to the stop mode is largely the same as the mode switching from the fast forward mode to the stop mode described above, so a description thereof will be omitted.

(6) When entering the rewind mode with the playback control lever held in the operating position; see Figure 6.

In this case, when operating the rewind operation lever 3 from the play mode to enter the rewind rewind mode (in the former case), and when operating the play and rewind operation levers simultaneously from the stop mode to enter the rewind mode (the latter case), and these cases will be explained below one by one.

In the former case, when the rewind operation lever 3 is pressed against the spring 17 and brought to the operating position in the playback mode as shown in FIG. 6
It is locked by the lock portion 6c and held at the above-mentioned operating position. At this time, the regeneration operation lever 5 is still held at the operating position because the lock edge of the corresponding lock portion 6e is longer than that of the lock portion 6c.

On the other hand, as the rewind operation lever 3 slides in the direction of arrow B, the transmission rod 8 moves toward the spring 20.
The operating arm 13, which was in the second position during the regeneration mode, is rotated in the direction of arrow G against the spring 21 via the intermediate arm 9.

Therefore, even though the regeneration operation lever 5 is in the actuation position, the actuation arm 13 does not touch the regulating pin 1k.
The operating gear 10, which had been driving the take-up reel stand 11a at a constant speed, is disengaged from the reel gear 11.

On the other hand, as the rewind operation lever 3 moves to the operating position immediately after the meshing of both gears 10 and 11 is released, the take-up reel stand 1
1a indicates arrow F in conjunction with a supply reel stand (not shown) that is driven at high speed by the action of the high-speed drive mechanism.
rotated at high speed in the direction

As a result, the auto-stop sensor 7 uses its abutting surface 7d to press against the pressing protrusion 1 of the slip plate 11c.
1d and rotates in the direction of arrow F with a larger stroke than in the playback mode, bringing the sliding protrusion 7b into sliding contact with the swinging cam 10a, and then rotating and swinging by the swinging cam 10a and the slip plate 11c. be moved.

With the above, the rewind mode is entered from the playback mode while holding the playback operation lever 5.

In the latter case, in the stop mode as shown in FIG. 3 and 5 are locked into locking portions 6c and 6e of locking plate 6 by locking pins 3b and 5b, respectively, and held in the operating position.

On the other hand, as the regeneration operation lever 5 moves backward in the direction of arrow B, the actuating arm 13 is moved by the spring 2.
1 tries to rotate in the direction of arrow F, but
At the same time, as the rewind operation lever 3 moves back, the transmission rod 8 moves back against the spring 20 and rotates the intermediate arm 9 in the direction of arrow F. and held in the first position against.

Further, as the levers 3 and 5 move to the operating position, the drive motor 14 is driven and the operating gear 1
0 in the direction of arrow F, and especially as the rewind operation lever 3 moves to the operating position, the take-up reel stand 11a moves in the direction of arrow F in conjunction with the supply reel stand driven by the high-speed drive mechanism. rotated at high speed.

As a result, the auto-stop sensor 7 uses its abutting surface 7d to press against the pressing protrusion 1 of the slip plate 11c.
1d, it rotates in the direction of arrow F with a larger stroke than in the playback mode, bringing the sliding protrusion 7b into sliding contact with the swinging cam 10a, and then rotating and swinging by the swinging cam 10a and the slip plate 11c. I am made to do so.

As described above, the stop mode is switched to the rewind mode by simultaneous operation of the playback operation lever and the rewind operation lever.

(7) Regarding mode switching from rewind mode to playback mode in item (6) above; see Figure 7.

Now, as shown in FIG. 6, in the rewind mode with the playback operation lever 5 held in the operating position, the tape on the take-up reel stand side is completely rewound on the supply reel stand side, and the tape is At the beginning of winding, the take-up reel stand 11a
At 1 g, the take-up reel stand 11a slips and stops rotating.

Therefore, as the rotation of the take-up reel stand 11a stops, the rotation of the slip plate 11c also stops, and the rotation of the slip plate 11c in the direction of arrow F relative to the auto-stop sensor 7 is deenergized. The auto-stop sensor 7 temporarily stops rotating when it is pushed farthest in the direction of arrow G by the maximum diameter portion 10d of the swinging cam 10a, and immediately thereafter, the auto-stop sensor 7 stops rotating.
The lock plate 6 is further rotated in the direction of arrow G, and the contact pin 7a is pressed against the contact portion 6f, causing the lock plate 6 to slide in the direction of arrow D. That is, the auto-stop sensor 7 performs an auto-stop operation.

Then, as the lock plate 6 slides in the direction of arrow D, the rewind operation lever 3 also moves because the amount of sliding of the lock plate 6 in this case is small.
Only the lock is released and the lever 3 is returned to the non-operating position by the spring 17.

As the rewind operation lever 3 returns to the non-operating position, the drive of the high-speed drive mechanism is stopped, and the transmission rod 8 is moved by the spring 20 to the arrow C.
At the same time, the intermediate arm 9 also returns in the direction of arrow G to release the force acting on the actuating arm 13, and the actuating arm 13 is brought into contact with the regulating pin 1l by the spring 21. The operating gear 10 is rotated to the second position to mesh with the reel gear 11.

As a result, the take-up reel stand 11a moves to the operating gear 1.
0 and starts winding the tape at a constant speed, the slip plate 11c first rotates the auto-stop sensor 7 in the direction of arrow F and slides its sliding protrusion 7b onto the swing cam 10a, and thereafter The auto-stop sensor 7 is rotated and oscillated in cooperation with the oscillating cam 10a.

This means that you have returned to playback mode.

(8) Regarding mode switching from the rewind mode to the stop mode in item (6) above; Now, in the rewind mode with the playback operation lever 5 held in the operating position as shown in Fig. 6, the stop operation When the lever 2 is pressed, the release pin 2b of the lever 2 hits the inclined surface 6b of the lock plate 6.
Since the lock plate 6 is slid in the direction of arrow D by coming into contact with the rewind operation lever 3, the lock plate 6 is sequentially unlocked in the order of the playback operation lever 5.
Each lever 3 and 5 is returned to its inactive position by a spring 17 and 19.

Therefore, while the transmission rod 8 and the intermediate arm 9 are returned to the non-operating position by the spring 20, the sliding protrusion 7b of the auto-stop sensor 7 is spaced apart from the maximum diameter portion 10d of the swing cam 10a. Drive motor 14 at opposite timing.
The drive is stopped and the stop mode shown in FIG. 1 is entered.

[Effects of the present invention]

As described above, the present invention rotates the auto-stop sensor during the rotation of the reel stand by using the swing cam and the pushing means within a range that does not apply any force to the actuated means, and when the end of the tape When the rotation of the reel stand stops, the swing cam pushes it back in the direction of the reel stand, and then the return cam pushes it back in the same direction, thereby applying an acting force to the actuated means. Therefore, it is sufficient to simply provide the auto-stop sensor in a pivoted manner, which simplifies the structure and allows for more accurate setting of the travel stroke required for the operation of the auto-stop sensor.

Further, in the present invention, the rotary body including the swing cam and the return cam is arranged to take a plurality of positions with different relative distances from the auto-stop sensor, and the rotary body is located at any of the positions. In this case, the actuated means is operated in conjunction with the stoppage of rotation of the reel stand, so the actuated means is moved by the operation of the auto-stop sensor depending on the position of the rotating body. Since the stroke can be changed, it is easy to design the actuated means based on the size of the tape recorder, and it can also be adapted to the type, form, size, etc. of the actuated means. You can. In short, this is an excellent invention that can be applied not only to the lock plate as in the embodiment but also to any other actuated means.

[Brief explanation of the drawing]

1 to 7 of the attached drawings show stop mode, playback mode, and mode of the tape recorder according to the present invention.
A state in the middle of switching from playback mode to stop mode, a fast forward mode, a state in the middle of switching from fast forward mode to stop mode, a rewind mode with the playback control lever held in the operating position, and a state in which the playback control lever is held in the operating position. FIG. 8 is a sectional view taken along the line A-A' in FIG. 1; FIG. 7: Auto stop sensor, 10: Operating gear, 10a: Swing cam, 10b: Return cam, 11
a: Reel stand, 11: Slip plate.

Claims (1)

[Claims] 1. A reel stand, a rotating body which is driven by an appropriate drive source and has a swing cam at the center of the plate surface and an arc-shaped return cam radially outward from the swing cam; an auto-stop sensor that is rotatably supported between the reel stand and the rotating body and has a sliding protrusion that can come into sliding contact with the swing cam and the return cam; push means for receiving the rotational force of the stand and cooperating with the swinging cam to cause the autostop sensor to rotate and swing; and when the rotating body is in any position, the auto-stop sensor is actuated by the swing cam and the pushing means to the actuated means while the reel stand is rotating. The reel table is rotated and swung within a range where no acting force is applied, and when the rotation of the reel stand stops at the end of the tape, the swing cam pushes it back in the direction of the reel stand.
The tape recorder further comprises a structure in which the return cam pushes back in the same direction to apply an acting force to the actuated means.