JPH0619870B2 - Operation mode selection switching device for tape recorder - Google Patents

Description

The present invention relates to a device for selecting and switching an operation mode such as fast-forward from a stopped state or an operating state of a tape recorder.

[Conventional technology]

The tape recorder is capable of switching between fast forward (FF) and rewind (reverse fast forward, RWD) operation modes and playback and recording operation modes. For example, when the FF mode is selected, as shown in FIG. 9, the gear 1 is pivotally supported by the driven member 5 of the link and is connected to the drive motor M to be rotationally driven.
2 rotates in the direction of arrow X ₁ from the position indicated by the chain line, and the gear 13
Mesh with. Then, the rotation is transmitted from the gear 13 through the gear 20, and the reel shaft 21 winds the rotation tape 23 from the reel 26 to the reel 25. At this time, the pinch rollers 31 and 32 and the magnetic head 33 are separated from the tape 23 so as not to hinder high speed running. When the RWD mode is selected, as shown in FIG. 10, the driven member 5 rotates from the position indicated by the chain line in the X ₂ direction indicated by the arrow, and the gear 12 meshes with the idler gear 15. Then gear 15 to gear 1
6, the rotation is transmitted via the gear 27, the reel shaft 28 rotates, and the tape 23 is wound from the reel 25 to the reel 26.

When the reproduction (or recording) operation mode is selected, the driven member 5 is retracted by the link, and as shown in FIG.
The driven member 17 to which the gear 14 (having a smaller number of teeth than the gear 12) is advanced and the gear 14 meshes with the gear 13. At the same time, the pinch roller 31 and the magnetic head 33 advance and come into contact with the tape 23. As a result, the tape 23 is wound around the reel 25 from the reel 26 while running (or recording) at a constant speed. In the case of the reproduction of the A surface in the above case, in the case of the reproduction of the B surface, the rotating member 17 is rotated as indicated by the dotted line, the gear 14 meshes with the idler gear 15, and at the same time, the pinch roller 31 retreats and the pinch roller 31 moves. Laura 3
2 advances and contacts the tape 23.

Conventionally, when selecting an operation mode such as fast forward, rewind, etc. from a stopped state or an operation mode with a tape recorder, the number of solenoids corresponding to the operation mode is provided and the operation mode is switched by operating each solenoid. is doing.

[Problems to be solved by the invention]

A conventional tape recorder which selects and switches the operation mode requires a number of solenoids corresponding to the operation mode, which hinders size reduction, weight reduction, and cost reduction.

The present invention has been made in order to solve the above problems, and provides an operation mode selection switching device for obtaining a compact and inexpensive tape recorder.

[Means for solving problems]

A configuration of an operation mode selection switching device of a tape recorder to which the present invention for solving the above problems is applied will be described with reference to FIG. 1 corresponding to the embodiment.

As shown in the figure, the operation mode selection switching device of the tape recorder to which the present invention is applied is provided with a cam 9, a cam 10 or a cam 8 for making the driven member 5 or the driven member 6 follow in accordance with the selected operation mode. The drive transmission means 12 in each operation mode is driven by the driven member 5 or the driven member 6.
Alternatively, the drive transmission means 18 is disconnected. For example, a guide portion 66 lower than the cam 10 is provided at the tip end portion in the direction in which the cam 10 is driven and moved, and a guide pin 67 having a smaller diameter than the engagement portion 53 is provided on the engagement portion 53 of the driven member 5. The guide pin 67 is engaged with the guide portion 66 so that the driven member 5 is guided by the cam 10.

[Action]

The driven member 5 or the driven member 6 is driven by the cam 8, the cam 9, or the cam 10, and the drive transmission means 12 or the drive transmission means 18 corresponding to each operation mode is operated. At this time,
For example, when the cam 10 suddenly tries to engage with the engaging portion 53 of the driven member 5, the engaging portion 53 is relatively thick and thus is not smoothly guided to the cam surface 10a. In the configuration of the present invention, the guide pin 67 is engaged with the guide portion 66, so that the driven member 5 is smoothly guided by the cam 10.

〔Example〕

Hereinafter, an embodiment of the operation mode selection switching device of the tape recorder of the present invention will be described in detail.

FIG. 1 shows a front view of the main part of an operation mode selection switching device of a tape recorder to which the present invention is applied. The device shown in the figure is a device for selecting and switching between a fast forward (FF) mode, a reverse fast forward (RWD) mode, and a PRG mode (see FIG. 2). The PRG mode is an abbreviation of program switching mode, and is a mode in which the tape running direction is reversed during the reproducing operation (A surface to B surface, or B surface to A surface) for reproduction.

FIG. 1 shows a neutral state of the operation. In the figure, 1 is a solenoid, 3 is a rotating body, 5 is a first driven member, 6 is a second driven member, 7 is a rotating body driving gear connected to the motor M, 11 is a positioning lever, and 12 is connected to the motor M. The reel drive gear 18 is a link member.

Operation pins 42 and 43 are planted in the plunger 41 of the solenoid 1. Although the operation pin 43 is urged to rotate the plunger 41 in the frontward direction by the spring 44, the rotation of the plunger 41 is stopped because the operation pin 42 is engaged with the positioning lever 11. An embodiment of a circuit for controlling and driving the solenoid 1 is shown in FIG. 2, and switches FF, RWD, PR for selecting each mode are provided.
G, switch OF to stop fast forward or reverse fast forward
When F is pressed, the timer circuit 40 outputs ON signals at different times. The ON signal turns on the switching transistor Q to apply the drive voltage V ₊ to the solenoid 1.

Details of the rotating body 3 are as shown in FIG. 3 in which an upper perspective view (a), a side view (b), and a lower perspective view (c) show a shaft 46.
The center of rotation is, and the side surface is an intermittent gear. A cam 8, a rotation guide portion 47, a stopper protrusion 48 protruding from the guide portion 47, and a pin 49 are fixedly provided on the upper surface of the rotating body 3. A cam 9 and a cam 10 are provided on the lower surface. The cam surface of the cam 8 is 8a, the cam surface of the cam 9 is 9a,
The cam surface of the cam 10 is 10a. A guide portion 66 having a sharp tip is provided at the tip of the cam 10 in the rotational movement direction. The height of the guide portion 66 is lower than the height of the cam 10. In the neutral state of the rotary body 3, the intermittent portion 3a faces the drive gear 7 as shown in FIG. Further, the spring 50 attached to the chassis is engaged with the pin 49, and the rotating body 3
Is urged to rotate counterclockwise.

The first driven member 5 is pivotally supported by a shaft 51, and the spring 5
It is biased by 2 and this state is stable. Driven member 5
The projection 53, which is an engaging portion facing the lower surface of the rotating body 3.
Is fixed. Further, a guide pin 67 having a diameter smaller than that of the protrusion 53 is attached to the protrusion 53. As described above, the guide portion 66 is provided at the tip of the cam 10 so that the guide portion 66 engages with the guide pin 67 when the rotating body 3 rotates. One end of the driven member 5 has a convex shape, and in the neutral state, the positioning lever 11 moves the tip portion 54.
Is engaged with. A reel drive gear 12 is axially supported by the first driven member 5, and when the driven member 5 rotates, the reel driven gear 12 meshes with a gear 13 on the forward rotation reel side or a gear 16 on the reverse rotation reel side via an idler gear 15. ing.

The second driven member 6 is rotatably supported by the shaft 58.
It is urged to rotate counterclockwise by 9. A stopper pin 2 is planted in the driven member 6, contacts the stopper protrusion 48 of the rotation guide portion 47 of the rotating body 3 to prevent the driven member 6 from rotating, and is urged to rotate by the spring 50. The rotating body 3 is stopped.

The positioning lever 11 is pivotally supported by a shaft 60, and is biased in a counterclockwise direction by a spring 61. A roller 62 is attached to the tip portion thereof and is engaged with the tip portion 54 of the driven member 5. The rear upper surface 63 of the positioning lever 11 supports the operation pin 42 of the solenoid 1 and stops the rotation of the plunger 41. The upright surface 6 of the positioning lever 11
4 is facing the other operation pin 43 of the plunger 41 at a slight distance.

The link member 18 is on the rotation locus of the second driven member 6,
The driven member 6 is pushed and moved when it is largely rotated clockwise. The link member 18 is connected to the driven member 17 to which the gear 14 is attached, the pinch roller 31, the pinch roller 32, and the magnetic head 33 (see FIG. 11) by a link mechanism (not shown).

The operation of the tape recorder operation mode selection switching device will be described.

<< Fast-forward (FF) operation >> To select the fast-forward operation, switch FF shown in FIG.
push. An ON signal is output from the timer circuit 40, and the solenoid 1 attracts only as indicated by FF in the time chart of FIG. When the solenoid 1 is attracted from the neutral state (FIG. 1), it is pulled by the operation pin 42, the second driven member 6 rotates clockwise, the stopper pin 2 disengages from the protrusion 48, and the urging force of the spring 50 is exerted. Then, the rotating body 3 slightly rotates. Then, the gear portion of the rotating body 3 meshes with the drive gear 7, and the rotating body 3 stops until the intermittent portion 3a next faces the drive gear 7, that is, one rotation (360 °). At this time, the second driven member 6 rotates while the solenoid 1 sucks, but returns after the suction is stopped, and the pin 2 abuts the guide portion 47 and remains stationary. About 45 ° in the middle of one rotation, the cam surface 9 of the cam 9
a reaches the projection 53 of the first driven member 5, the cam 9 pushes the projection 53, and the driven member 5 starts rotating in the clockwise direction. Since the rotation of the rotating body 3 continues, the driven member 5 continues to rotate by the cam 9. When the chain line shown in FIG. 5 changes to the solid line, the reel drive gear 12 meshes with the gear 13 to start the fast-forward operation. That is, the operation mode as shown in FIG. 9 is realized.

As shown in FIG. 5, when the first driven member 5 rotates, the tip portion 54 of the first driven member 5 disengages from the roller 62 of the positioning lever 11. At this time, the suction of the solenoid 1 has already been completed, and the plunger 41 is rotatable because it is not in a loaded state. Therefore, the tensional pressing of the operation pin 42 against the rear upper surface 63 of the positioning lever 11 is released, and the spring 61 is pulled to position the positioning lever 1 about the shaft 60.
1 rotates counterclockwise. As a result, the roller 62 engages with the concave portion 55, the upright surface 64 approaches the operation pin 43 of the plunger 41, and the rear upper surface 63 pushes up the operation pin 42 against the bias of the spring 44 and pushes up the plunger 41. Since the operation pin 42 is pivoted upward, the engagement of the operation pin 42 with the second driven member 6 is released. In this state, the fast-forward operation continues.

<< Reverse Reverse Fast Forward (RWD) Operation >> To select reverse reverse fast forward operation, switch RW in FIG.
When D is pressed, an ON signal from the timer circuit 40 causes the solenoid 1 to attract as shown by RWD in FIG. The reverse rotation fast-forward operation starts from a neutral state like the fast-forward operation, and the series of operations is almost the same as the fast-forward operation. However, since the solenoid 1 is attracted at different times, different cams perform effective work. The difference will be mainly described.

While the rotating body 3 rotates once, the cam 9 causes the first driven member 5 to rotate once in the clockwise direction, but the solenoid 1 continues to attract (see FF and RWD in FIG. 4).
Therefore, the plunger 41 cannot rotate. Therefore, the positioning lever 11 does not rotate and the first driven member 5 does not rotate.
However, the concave portion 55 temporarily faces the roller 62 but does not engage with it. After the rotating body 3 rotates and the cam 9 passes through the protrusion 53 of the first driven member 5, the suction of the solenoid 1 is stopped. Then, the second driven member 6 returns in the counterclockwise direction, and the stopper pin 2 abuts and follows the rotating guide portion 47.

When the guide portion 66 at the tip of the cam 10 reaches the guide pin 67 of the protrusion 53 as shown in FIG. 8 as the rotating body 3 continues to rotate, the guide pin 67 is thinner than the protrusion 53,
The tip of the guide portion 66 is easily guided, and the cam surface 10a side is guided to the protrusion 53. Then, the cam 10 pushes the protrusion 53 and the driven member 5 rotates counterclockwise. Sixth
When the chain line shown in the figure changes to the solid line, the drive gear 12 meshes with the idler gear 15 to start the reverse rotation rapid feed operation. That is, the operation mode as shown in FIG. 10 is realized. At this time, the movement of the positioning lever 11 and the solenoid 1 after the suction is completed is the same as in the fast-forward operation. However, as shown in FIG. 6, the roller 62 of the positioning lever 11 is
Differs in that it engages with the concave portion 56. In this state, the reverse rotation fast forward operation continues.

<< Stop (OFF) Operation >> To stop the fast-forward operation (or reverse reverse fast-forward operation), press the switch OFF in FIG.
In response to the ON signal from the solenoid 1, the solenoid 1 attracts only as indicated by OFF in FIG. When the solenoid 1 is attracted from the state shown in FIG. 5 (or FIG. 6), the upright surface 64 of the positioning lever 11 approaches the operation pin 43 and is pulled, and the positioning lever 11 rotates clockwise. Then, the engagement between the roller 62 and the concave portion 55 (or the concave portion 56) of the first driven member 5 is released. Since the first driven member 5 is pulled by the spring 52 and the engagement of the roller 62 is released, the first driven member 5 returns to the neutral state together with the positioning lever 11. The operation pin 42 leaves the contact with the rear upper surface 63 of the positioning lever 11 and contacts the upper surface 57 of the second sliding member 6. When the suction of the solenoid 1 is finished here, the solenoid 1 slides back along the upper surface 57 and returns to the upper surface 5.
The upper surface 6 of the rear part of the positioning lever 11 at the position where 7 is interrupted
Hit 3. As a result, the stop operation ends, and the neutral state is restored.

Since the second driven member 6 does not rotate during this stopping operation, a series of rotations of the rotating body 3 caused by the trigger operation and the cam 9
(Or the cam 10) does not rotate the first driven member 5. Therefore, the reel drive gear 12 is replaced by the gear 13 or the gear 1.
The start and stop operations can be performed without inducing other operations such as engagement with 5, and the reproduction operation can be performed.

<< Program (PRG) Operation >> When the program switching operation is selected, the switch PRG shown in FIG. 2 is pressed. The ON signal from the timer circuit 40 causes the solenoid 1 to attract as shown by PRG in FIG. As a result, the pin 2 is disengaged and the gear portion of the rotating body 3 meshes with the rotating body drive gear 7, and the rotating body 3 makes one rotation and stops. 1
During the rotation, the cam 9 rotates the driven member 5 in the clockwise direction, and then the cam 10 rotates the driven member 5 in the counterclockwise direction. However, since the solenoid 1 continues to suck, the plunger 41 cannot rotate and the positioning lever 1
1 does not rotate either. Therefore, the first driven member 5 returns to the same state as the neutral state (the state in which the gear 12 is not meshed). When the rotating body 3 rotates about 270 °, the cam surface 8a of the cam 8 reaches the pin 2 of the second driven member 6 before the solenoid 1 stops the suction, and the cam 8 pushes the pin 2 so that the driven member 6 moves. Start turning in the clockwise direction. Immediately after this, the solenoid 1 finishes the suction and the plunger 41 returns, but the second driven member 6 continues to rotate and pushes the link member 18 as shown in FIG. 7.

As shown by the solid line in FIG. 11, assuming that the gear 14 meshes with the gear 13 and the pinch roller 31 advances and the A surface is being reproduced, the above program switching operation is performed. Due to the movement, the driven member 17 rotates in the direction indicated by the chain line, and the gear 14 meshes with the gear 15.
The pinch roller 32 advances and comes into contact with the tape 23. That is, the reproduction of the B side shown by the dotted line in the figure is started. On the contrary, if the program switching operation is performed while the reproduction of the B side indicated by the dotted line in the figure is being performed, the link member 18 is also generated.
The driven member 17 rotates in the direction indicated by the solid line to cause the gear 14 to mesh with the gear 13, and the pinch roller 31
Started to play the A side.

With the above configuration, the engaging portion 53 of the first driven member 5 is the cam 9
Alternatively, a certain thickness is required to withstand the pressing force of the cam 10 in terms of strength. When the first driven member 5 is rotated by the pressing operation of the cam 9 and then returned to the neutral state by the force of the spring 52, if the return is insufficient, it may not be switched to the cam surface 10a side of the cam 10. is there. At that time, if the guide portion 66 and the guide pin 67 are not provided, the tip end of the cam 10 strikes the engaging portion 53, and the rotating body 3 tries to continue rotating. Therefore, the rotating body 3 or the driven member 5 or the like does not move. Parts are damaged. Therefore, as described above, the guide portion 66 and the guide pin 67 are provided and engaged with each other to smoothly guide the driven member, so that damage to the parts can be prevented.

Although the independent timer circuit 40 is used to control the operation time of the solenoid 1 in the above-described embodiment, the timer of the microcomputer for controlling other devices may be shared.

Further, in the above embodiment, the guide portion 66 is provided only on the cam 10 among the cams 8, 9 and 10, but if the guide portions are provided on the cams 8 and 9, the cam 8,
It is smooth for the cam 9 to drive the driven member. When the guide portion is provided on the cam 8, the guide pin is attached coaxially with the stopper pin 2 of the second driven member 6.

〔The invention's effect〕

As described above, the operation mode selection switching device of the tape recorder to which the present invention is applied can switch the mode drive transmission means by controlling the operation time of the solenoid and operating the effective cam. Therefore, the tape recorder using this device becomes extremely compact and inexpensive. Moreover, since the operation by the cam is smoothly guided by the guide portion on the cam side and the guide pin on the driven member side, there is no obstacle that the cam and the driven member are engaged with each other, which has been apt to occur conventionally.

[Brief description of drawings]

FIG. 1 is a front view of essential parts of an embodiment of an operation mode selection switching device of a tape recorder to which the present invention is applied, FIG. 2 is a view showing an embodiment of a circuit for controlling and driving a solenoid, and FIG. FIG. 4 is a detailed view, FIG. 4 is a view for explaining the relationship between the time chart of the solenoid and the rotation angle of the rotating body, FIGS. 5 to 7 are views showing the operating state of the apparatus of the above embodiment, and FIG. 8 is a guide part. FIG. 9 is a perspective view for explaining the guiding state of FIG. 11, and FIGS. 9 to 11 are views for explaining each operation mode of the tape recorder. 1 ... Solenoid, 3 ... Rotating body 5 ... First driven member, 6 ... Second driven member 7 ... Rotating body drive gear 8,9,10 ... Cam 11 ... Positioning lever 12 ... Fast feed drive Gear 13 ... Forward rotation reel side gear 14 ... Regeneration drive gear 15 ... Idler gear 16 ... Reverse rotation reel side gear 17 ... Follower member, 18 ... Link member 40 ... Timer circuit, 66 ... Guide section 67 ... … Guide pin FF …… Fast forward RWD …… Reverse rotation fast forward PRG …… Program, OFF …… Stop

Claims (1)

[Claims] 1. An operation mode selection switching device for a tape recorder, wherein a cam for moving a driven member according to a selected operation mode is provided, and the driven member is driven to connect and disconnect the drive transmission means of each operation mode. A guide portion lower than the cam is provided at the tip end portion in the direction in which the driven member moves, a guide pin having a smaller diameter than the engagement portion is provided on the engagement portion of the driven member, and the guide pin is engaged with the guide portion. An operation mode selection switching device for a tape recorder, characterized in that the driven member is guided by the cam.