JPH045080Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to tape recorders (including tape players), and particularly relates to a tape recorder with simplified fast-forward and rewind mechanisms.

[Background of the idea]

Conventional fast-forwarding and rewinding mechanisms have a complicated structure due to the large number of moving parts, making it difficult to downsize tape recorders.

[Purpose of the invention] In view of the actual state of the prior art, the purpose of the invention is to provide a fast-forwarding system with a simple structure and reliable operation.
An object of the present invention is to provide a tape recorder equipped with a rewind mechanism.

[Summary of the idea]

In order to achieve this object, the present invention includes a first reel stand and a second reel stand arranged at a predetermined interval, a first rotary drive body arranged at a predetermined interval, and a second reel stand arranged at a predetermined interval. 1, which is movably arranged between the first reel stand, the second reel stand, and the first rotational drive body and the second rotational drive body.
one idler and a moving mechanism that moves the idler in a predetermined direction, the moving mechanism moves the idler, and the rotational force of one rotational drive body is transmitted through the idler to the rotational drive body. In a tape recorder configured to transmit power to one reel stand corresponding to a first position holding part that holds the idler at an intermediate position that does not involve the idler; and a second position holding part that moves and holds the idler to a position where the idler can engage with one rotational drive body and one reel stand; a support body rotatably supporting the idler and having an engaging part that can be engaged with the first position holding part and the second position holding part of the cam means; providing an elastic means for elastically biasing one rotary drive body and one reel stand in an engageable position direction, engaging with the cam means and locking at a predetermined position;
When the lock is released, an engaging body is provided that moves to the second position holding part side and forcibly moves the abutting engaging part toward the second position holding part side, and is connected to the engaging body and is connected to the second position holding part side. An electromagnetic solenoid that drives an engaging body is provided, and only when the electromagnetic solenoid operates for a long time, the engaging body moves the engaging part of the support body toward the second position holding part, and the elastic force of the elastic means is used. By engaging and moving the engaging portion of the support body with the second position holding portion against It is characterized by being configured to be retained.

[Example of idea]

An embodiment of the tape recorder of the present invention will be described with reference to FIGS. 1 to 10. All figures show the vicinity of the fast forward/rewind mechanism.

Figures 1 and 2 show a state in which neither fast-forwarding nor rewinding is performed, such as in a recording/playback state; Figure 1 is a plan view, and Figure 2 is a top view of the first FIG. 3 is a rear view of the main part of the figure.

The supply side reel stand 3 and the take-up side reel stand 4 are rotatable, which are equipped with hub drive shafts 1 and 2 that can be engaged with a hub of a cassette (not shown), and have teeth at a predetermined pitch on the outer periphery. It is provided. The flywheels 5 and 6 adjacent to the reel stands 3 and 4 are provided so that the rotational force of the motor is transmitted to them via belts and pulleys (not shown), so that they rotate in opposite directions. Driving gears 7 and 8 having teeth with the same pitch interval are integrally provided on the face walls of the flywheels 5 and 6.
Rotates with 6. At the center of one of the flywheels 6 and drive gear 8, a support shaft 10 with a small diameter gear 9 fixed to its tip is provided upright, and the small diameter gear 9 rotates in the same direction as the flywheel 6.

Between the reel stands 3, 4 and the drive gears 7, 8,
An idler 12 is rotatably supported at one end of a support 11 made of a substantially square-shaped plate. The idler 12 is integrally formed with a small-diameter first gear 13 that has teeth that can mesh with the reel stands 3 and 4, and a large-diameter second gear 14 that has teeth that can mesh with the drive gears 7 and 8. has been done. Support 11
is provided so as to be able to move in parallel in the left-right direction in FIG. 1, and is stretched between one end of this support 11 and a chassis (not shown).
is always elastically biased to the right.

An intermittent gear 16 that can mesh with the small diameter gear 9 is connected to the shaft 17.
It is rotatably provided by. intermittent gear 1
The tooth portion 6 is provided with a first intermittent portion 18 and a second intermittent portion 19 that have no teeth only in predetermined portions. When the small diameter gear 9 faces the intermittent portions 18 and 19, the small diameter gear 9 and the intermittent gear 16 do not mesh with each other.

As shown in FIG. 2, a crescent-shaped first cam 2 is provided on the back surface of the intermittent gear 16 facing the support body 11.
0, and an arcuate second cam 21 is provided protrudingly. The inner edge of the first cam 20 is formed in an arc shape at a predetermined distance from the shaft 17. The second cam 21 has one end 21a located at a predetermined distance from the shaft 17, and the other end 21a.
It is provided so as to be further away from the shaft 17 as the side 1b approaches. Furthermore, a first locking pawl 22 and a second locking pawl 23 are provided protrudingly at predetermined positions on the circumference centered on the shaft 17 . Although not shown, a rotating mechanism that comes into elastic contact with the intermittent gear 16 is provided, and the elastic contact force of the mechanism causes the intermittent gear 16 to always move in the direction of arrow A.
It is urged to rotate in the direction shown in .

At one end of the support body 11, a first cam 20 and a second cam 20 are provided.
A follower pin 24 is erected to face the cam 21. Note that this follower pin 24 is arranged so as to come into contact with one end 21a of the second cam 21 when the idler 12 does not mesh with the reel stands 3, 4 and the drive gears 7, 8.

A substantially L-shaped engaging body 26 on which a locking pin 25 that can be engaged with the first locking claw 22 and the second locking claw 23 is erected is swingably supported by a shaft 27. ing. One end of the engaging body 26 is connected to the electromagnetic solenoid 2
It is rotatably connected to the drive shaft 28 of No. 9, and an inclined surface 26a having a predetermined width is formed at the other end. In addition,
The locking pin 25 is arranged so as not to come out of the circumference where the locking claws 22 and 23 are located within the range in which the engaging body 26 swings due to the operation of the electromagnetic solenoid 29. .

The operation of the tape recorder mentioned above will be explained. As shown in FIGS. 1 and 2, when neither fast forwarding nor rewinding is performed, the engaging body 26 is located at the outermost position of the intermittent gear 16 (hereinafter referred to as the outermost position). Move and lock pin 25
and the first locking claw 22 are locked. By locking the locking pin 25 and the first locking pawl 22, rotation of the intermittent gear 16 is prevented against the rotational force of a rotation mechanism (not shown). Furthermore, when the locking pin 25 and the first locking pawl 22 are locked, the first intermittent portion 18 is designed to face the small diameter gear 9, so the intermittent gear 16 is connected to the small diameter gear 9. The above-mentioned locking pin 25
In conjunction with the locked state between the first locking pawl 22 and the first locking pawl 22, the rotation is stopped. At the same time, the follower pin 24 of the support body 11 is pressed against one end 21a of the second cam 21 by the elastic urging force of the spring 15. In this way, by holding the support body 11 with the follower pin 24 separated from the shaft 17 by a predetermined distance, the idler 12 is positioned at a position where it does not mesh with the reel stands 3, 4 and the drive gears 7, 8. (hereinafter referred to as an intermediate position), and neither fast forward nor rewind operations are performed.

Next, from the stopped state shown in Figures 1 and 2,
The case of fast-forwarding will be explained with reference to FIGS. 3 to 6. 4 is a rear view of the main part of FIG. 3, and FIG. 6 is a rear view of the main part of FIG. 5.

In the state shown in FIG. 1, the electromagnetic solenoid 29 is operated to move the engaging body 26 to a predetermined position on the first cam 20 side (hereinafter referred to as the innermost position) for a predetermined time as shown by the two-dot chain line in FIG. Shake only. When the engaging body 26 moves toward the first cam 20, the locking pin 25 is disengaged from the first locking claw 22, so the intermittent gear 16 is rotated in the direction of arrow A by a rotation mechanism (not shown). . Then, the intermittent gear 16 meshes with the small-diameter gear 9, and the rotational force of the flywheel 6 is transmitted to it, so that the intermittent gear 16 starts rotating. Note that the swinging time of the engaging body 26 is set to a relatively short time that allows the locking state between the locking pin 25 and the first locking pawl 22 to be released.

As the intermittent gear 16 rotates, the follower pin 24 is disengaged from the second cam 21, so the support body 11 is moved toward the spring 15 side. at the same time,
As shown in FIG. 3, the first gear 13 of the idler 12 meshes with the take-up reel stand 4, the second gear 14 meshes with the drive gear 8, and the rotational force of the flywheel 6 is transmitted through the idler 12. The signal is transmitted to the take-up reel stand 4, and a fast forwarding operation is started.
As the intermittent gear 16 rotates, the follower pin 24 moves along a predetermined circumference on the outer edge side of the first cam, as shown by arrow B.

When the intermittent gear 16 further rotates, the results shown in FIGS.
As shown in the figure, the locking pin 25 of the engaging body 26, which has returned to the outermost position, locks with the second locking claw 23, and resists the rotational force of the rotation mechanism (not shown), and Rotation of gear 16 is prevented. Further, when the locking pin 25 and the second locking pawl 23 are locked, the second intermittent portion 19 is designed to face the small diameter gear 9, so the intermittent gear 16 is connected to the small diameter gear 9. The above-mentioned locking pin 25
The rotation is stopped in combination with the locked state of the second locking pawl 23 and the second locking claw 23. When the intermittent gear 16 stops as described above, the follower pin 24 is located near one end 21b of the second cam 21, and the idler 1
2, the take-up reel stand 4, and the drive gear 8 remain in mesh with each other, and the fast-forwarding operation continues.

Next, the operation when stopping the fast forward operation shown in FIGS. 5 and 6 will be explained.

In the fast-forward operation state shown in FIG. 5, the electromagnetic solenoid 29 is operated to swing the engaging body 26 to the innermost position for a predetermined period of time. Due to this operation, the locking pin 25 is disengaged from the second locking pawl 23, so that the intermittent gear 16 is rotated in the biasing direction by a rotation mechanism (not shown). The intermittent gear 16 meshes with the small diameter gear 9, and rotates upon transmission of the rotational force of the flywheel 6. 2nd cam 2
Since one end 21a of 1 is brought closer to the shaft 17 side, as the intermittent gear 16 rotates, the follower pin 24
moves toward the shaft 17, and at the same time, the support 11 also moves against the spring 15 in the opposite direction. Then, as shown in Figure 1,
When the locking pin 25 engages with the first locking pawl 22 and the small diameter gear 9 faces the first intermittent portion 18, the intermittent gear 16 is stopped and the support 11 is prevented from moving. Therefore, the idler 12 moves to the intermediate position and the fast forward operation is stopped.

Next, as shown in FIG. 1, the case where a rewinding operation is performed from a state where neither fast forwarding nor rewinding is performed will be described with reference to FIGS. 7 to 10. 8 is a rear view of the main part of FIG. 7, and FIG. 10 is a rear view of the main part of FIG. 9.

In the state shown in FIG. 1, the electromagnetic solenoid 29 is operated to swing the engaging body 26 to the innermost position for a predetermined period of time as shown by the two-dot chain line in FIGS. 7 and 8. Due to this swinging movement, the locking pin 2
5 is removed from the first locking pawl 22, the intermittent gear 16 is rotated in the direction of arrow A by a rotation mechanism (not shown).
rotated in the direction Then, the intermittent gear 16 meshes with the small diameter gear 9 and starts rotating. In addition, the engaging body 2
The rocking time of No. 6 is set longer than that in the case of the fast forward operation (see FIG. 4). As shown by the two-dot chain line in FIG. 8, since the engaging body 26 is located at the innermost position for a long time, the follower pin 24 that has come off the second cam 21 is regulated by the inclined surface 26a and the first
It is guided to the inner edge side of the cam 20. Then, at the time when the follower pin 24 engages with the inner edge of the first cam 20,
The engaging body 26 returns to the outermost position.

The shape of the inner edge of the second cam 21 is such that the follower pin 24 approaches the shaft 17, so as the intermittent gear 16 rotates and the follower pin 24 approaches the shaft 17, the support body 11 It moves in the opposite direction to the spring 15 against the spring 15. As the support body 11 moves, the first gear 13 of the idler 12 meshes with the supply reel stand 3, and the second gear 14
meshes with the drive gear 7, and the rotational force of the flywheel 5 is transmitted to the supply side reel stand 3 via the idler 12.
The winding operation is started.

When the intermittent gear 16 further rotates, FIGS. 9 and 1
As shown in Figure 0, the follower pin 24 is connected to the second cam 21.
Slide on the inner edge of the Then, the locking pin 25 of the engaging body 26 that has returned to the outermost position is locked, and the small diameter gear 9 faces the second intermittent portion 19, so that the rotation of the intermittent gear 16 is stopped. Thus, while the intermittent gear 16 is at rest, the follower pin 24 is
Since the idler 12 remains in mesh with the supply reel stand 3 and the drive gear 7, the rewinding operation continues.

Next, the operation for stopping the rewinding operation shown in FIGS. 9 and 10 will be described.

In the rewinding state shown in FIG. 9, the electromagnetic solenoid 29 is operated to swing the engaging body 26 to the innermost position for a predetermined period of time. Due to this operation, the locking pin 25 is disengaged from the second locking pawl 23, so that the intermittent gear 16 is rotated in the biasing direction by a rotation mechanism (not shown). The intermittent gear 16 meshes with the small diameter gear 9, and rotates upon transmission of the rotational force of the flywheel 6. The follower pin 24 is connected to one end 21 of the first cam 20 to the second cam 21.
At the same time, the support 11 is also moved toward the spring 15 by the spring 15. Then, as shown in FIG.
5 engages with the first locking pawl 22, and the small diameter gear 9 faces the first intermittent portion 18, so that the intermittent gear 16 is stopped, and the idler is stopped by the movement of the support 11. 12 moves to the intermediate position,
The rewinding operation is stopped.

As described above, by changing the rocking time of the engaging body 26, it is possible to select fast forwarding and rewinding operations, so there is no need to provide separate mechanisms for fast forwarding and rewinding. This is effective in simplifying the process and downsizing the tape recorder.

[Effect of idea]

As explained above, according to the present invention, the engaging part of the support is forcibly moved toward the second position holding part by the operating time of the electromagnetic solenoid with respect to the cam means that rotates only in one direction, and the support is Since the direction of movement is switched, fast-forwarding and rewinding operations can be performed with a simple configuration, and miniaturization can be achieved.

Further, since the cam means rotates only in one direction, there is no need for a control circuit for forward and reverse rotation, and the rotational force of a flywheel, for example, can be used as a drive source for the cam means, reducing the need for a motor. Cost reduction can be achieved.

[Brief explanation of drawings]

All of the figures show the vicinity of the fast forward/rewind mechanism of the tape recorder according to the embodiment of the present invention. The figure is the first
3 is a plan view showing the start state of the fast forward operation, FIG. 4 is a rear view of the main part of FIG. 3, FIG. 5 is a plan view showing the continuation state of the fast forward operation, and FIG.
The figure is a rear view of the main part of Fig. 5, Fig. 7 is a plan view showing the start state of the rewinding operation, Fig. 8 is a rear view of the main part of Fig. 7, and Fig. 9 is a continuation state of the rewinding operation. The plan view shown in FIG. 10 is a rear view of the main part of FIG. 9. 3, 4... Reel stand, 5, 6... Flywheel, 11... Support body, 12... Idler, 15
... Spring, 20 ... First cam, 21 ... Second cam, 24 ... Follower pin, 26 ... Engagement body, 2
9...Electromagnetic solenoid.

Claims (1)

[Claims for Utility Model Registration] A first reel stand and a second reel stand arranged at a predetermined interval, a first rotary drive body arranged at a predetermined interval, and a second rotary drive body body and
One idler movably arranged between the first reel stand, the second reel stand, the first rotational drive body and the second rotational drive body, and movement for moving the idler in a predetermined direction. a mechanism, and configured to move the idler by the moving mechanism so that the rotational force of one rotational driving body is transmitted to one reel stand corresponding to the rotational driving body via the idler. In the tape recorder, the moving mechanism has a cam means, the cam means rotates in one direction, and a first position holding part that moves the idler and holds the idler in an intermediate position where the idler does not participate in power transmission. and a second position holding part that moves and holds the idler to a position where the idler can engage with one rotary drive body and one reel stand, rotatably supports the idler and A support body having an engaging part that can be engaged with the first position holding part and the second position holding part of the cam means is provided, and the idler can be engaged with one rotary drive body and one reel stand. an elastic means for elastically biasing the cam in a certain position direction, the elastic means being engaged with the cam means and locked in a predetermined position;
When the lock is released, an engaging body is provided that moves to the second position holding part side and forcibly moves the abutting engaging part toward the second position holding part side, and is connected to the engaging body and is connected to the second position holding part side. An electromagnetic solenoid that drives an engaging body is provided, and only when the electromagnetic solenoid operates for a long time, the engaging body moves the engaging part of the support body toward the second position holding part, and the elastic force of the elastic means is used. By engaging and moving the engaging portion of the support body with the second position holding portion against A tape recorder configured to be retained.