JPH0814904B2 - 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 can switch 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 12, which is pivotally supported by the driven member 5 of the link and is rotationally driven by being connected to the drive motor M, is indicated by the arrow X ₁ from the position indicated by the chain line. It rotates in the direction and meshes with the gear 13. Then, the rotation is transmitted from the gear 13 through the gear 20, the reel shaft 21 rotates, and the tape 23 is wound 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 is rotated in the arrow X ₂ direction from the position indicated by the chain line, and the gear 12 meshes with the idler gear 15. Then gear
Rotation is transmitted from 15 through gear 16, gear 27 and reel shaft 28
Rotates and the tape 23 is wound from the reel 25 to the reel 26.

When the playback (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 fewer 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 the tape 23
Contact with. As a result, the tape 23 is wound on 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, and the gear 14 is rotated.
Meshes with the idler gear 15, and at the same time, the pinch roller 31 retreats and the pinch roller 32 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. are doing. In some cases, the suction force of each solenoid may cause the gears, etc. in each operation mode to be interrupted, and the attraction of each solenoid may trigger the link mechanism to operate, and the gears, etc. in each operation mode may be interrupted by other power (eg, main motor). In some cases. In the former case, each solenoid must be large and have a strong suction force. However, in the latter case, there is an advantage that the attraction force of each solenoid is not so required.

[Problems to be solved by the invention]

In any case, the conventional tape recorder which selects and switches the operation mode requires the number of solenoids corresponding to the operation mode, which hinders reduction in size and weight and cost.

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 FIG. 1, the operation mode selection switching device of the tape recorder to which the present invention is applied includes one solenoid 1 that operates for different lengths of time according to the operation mode selection operation, and the operation of the solenoid 1. It has a rotating body 3 which is rotated when the stopper 2 is released by the start. The rotating body 3 is provided with cams 8, 9 and 10 having the same number of operation modes that can be selected and operated, and the driven start times of the driven member 5 and the driven member 6 are different according to each operation mode.
By operating the solenoid 1 for a time period corresponding to each operation mode, the cam 8, cam 9 or cam 10 corresponding to each operation mode is operated.
The driven start of the driven member 5 or the driven member 6 is guided. The drive member 12 or 18 in each operation mode is intermittently connected by the driven member 5 or the driven member 6 of the cam 8, 9 or 10 being driven.

[Action]

The actuation of the driven member 5 or the driven member 6 of the cam 8, the cam 9 or the cam 10 according to each operation mode is guided by the operation of the solenoid 1 for a time according to each operation mode. Therefore, the drive transmission means 12 or 18 in each operation mode can be switched by simply controlling the operating time of one solenoid 1.

〔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 fast forward (FF) mode, reverse reverse fast forward (RWD) mode, P
This is a device that selects and switches the RG mode (see Fig. 2).
The PRG mode is an abbreviation for the program switching mode, and is a mode in which the tape running direction is reversed during the reproduction 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 drive 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.

The plunger 41 of the solenoid 1 has operation pins 42 and 43.
Has been planted. The operation pin 43 is urged by the spring 44 to rotate the plunger 41 in the frontward direction, but the operation pin 42 is engaged with the positioning lever 11, so that the rotation of the plunger 41 is stopped. An embodiment of a circuit for controlling and driving the solenoid 1 is shown in FIG. 2, and switches FF, RWD, PRG for selecting each mode, and a switch OFF for stopping fast forward or reverse fast forward are pressed for different times from the timer circuit 40. The ON signal of is output. The ON signal turns on the switching transistor Q to apply the drive voltage V ₊ to the solenoid 1.

As shown in FIG. 3 showing the upper perspective view (a), the side view (b) and the lower perspective view (c), details of the rotating body 3 are shown in FIG.
The center of rotation is, and the side surface is an intermittent gear. A cam 8, a rotation guide portion 47, a stopper projection 48 protruding from the guide portion 47, and a pin 49 are fixedly mounted 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, and the cam 10 is
The cam surface of is 10a. In the neutral state, the intermittent portion 3a faces the drive gear 7, as shown in FIG. A spring 50 attached to the chassis is engaged with the pin 49 to urge the rotating body 3 to rotate counterclockwise.

The first driven member 5 is pivotally supported by a shaft 51 and has a spring 52.
It is urged by and this state is stable. A protrusion 53 is fixedly provided on the driven member 5 so as to face the lower surface of the rotating body 3.
One end of the driven member 5 has a convex shape, and the positioning lever 11 is engaged with the tip portion 54 in the neutral state. 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 pivotally supported by a shaft 58 and has a spring 59.
Is urged to rotate in the counterclockwise direction. 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, stops the rotation of the driven member 6, 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 at its tip
62 is attached and engages 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 64 of the positioning lever 11 faces 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. 2 is used.
Press. An ON signal is issued 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. 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 during the suction of the solenoid 1, but returns after stopping the suction,
The pin 2 does not move because it abuts on the guide portion 47. About 45 ° in the middle of one rotation, the cam surface 9a of the cam 9 reaches the protrusion 53 of the first driven member 5, the cam 9 pushes the protrusion 53, and the driven member 5 starts rotating in the clockwise direction. Since the rotation of the rotating body 3 continues, the rotation of the driven member 5 continues by the cam 9, and when the chain line shown in FIG.
Engages with the gear 13 and starts 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 positioning lever 11 is disengaged from the roller 62. At this time, the suction of the solenoid 1 has already been completed, and the plunger 41 is rotatable because it is not under load. Therefore, the tension pressing of the operation pin 42 against the rear upper surface 63 of the positioning lever 11 is released, and the spring 61 pulls the positioning pin 11 to rotate the positioning lever 11 counterclockwise about the shaft 60. 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 rotates the plunger 41 in the front upward direction, so that the operation pin 42 is moved to the second position.
The engagement with the driven member 6 is released. In this state, the fast-forward operation continues.

《Reverse rotation rapid feed (RWD) operation》 To select reverse rotation rapid feed operation, switch RW in Fig. 2
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). The plunger 41 cannot rotate. Therefore, the positioning lever 11 also does not rotate, only the first driven member 5 rotates, and the recessed portion 55 temporarily faces the roller 62 but does not engage. 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. The rotation of the rotating body 3 continues, and the cam surface 10a of the cam 10 has the protrusion 5
3, the cam 10 pushes the protrusion 53 and the driven member 5 rotates counterclockwise. When the chain line shown in FIG. 6 changes to the solid line, the drive gear 12 meshes with the idler gear 15 to start the reverse rotation fast-forward operation. That is, the operation mode as shown in FIG. 10 is realized. Positioning lever 11 at this time
The movement of the solenoid 1 and the solenoid 1 after the suction is the same as in the fast-forward operation. However, as shown in FIG. 6, the roller 62 of the positioning lever 11 is different in that it engages with the concave portion 56. In that 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. 2 and the ON signal from the timer circuit 40 will cause the solenoid 1 to indicate OFF in Fig. 4. Suction. When the solenoid 1 is attracted from the state shown in FIG. 5 (or FIG. 6), the positioning pin 11 is attached to the operation pin 43.
The upright surface 64 of the
11 rotates clockwise, and the roller 62 and the first driven member 5
The concave portion 55 (or concave portion 56) is disengaged. Since the first driven member 5 is pulled by the spring 52 and the roller 62 is no longer engaged, 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 when the upper surface 57 is interrupted, the positioning lever 11
Hit the rear upper surface 63. 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,
There is no series of rotations of the rotating body 3 caused by the trigger operation and rotation of the first driven member 5 by the cam 9 (or the cam 10). Therefore, the reel drive gear 12 can be stopped without inducing another operation such as meshing with the gear 13 or the gear 15, and the reproduction operation can be performed.

<< Program (PRG) operation >> To select the program switching operation, press the switch PRG in Fig. 2. 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. In the middle of one 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 11 does not rotate. 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). Rotating body 3
After rotating 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 to move the driven member 6 clockwise. Start turning. 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 in FIG. 8A, the link member 18 is engaged with the reverse trigger arm 70. The trigger arm 70 is engaged with the stopper 73a of the reverse gear 72, and the intermittent gear portion 71a of the reverse gear 72 is driven by the motor M so as to rotate.
Facing 5 A drive pin 76 is planted on the upper surface of the reverse gear 72. As shown in FIG. 8 (b),
The drive pin 76 is engaged with the groove of the reverse plate 78.
The reverse plate 78 is engaged with the protrusions 85 and 86 mounted on the chassis (not shown) through the guide slots.
A roller 82 is attached to the tip of the T-shaped plate 80 supported by the shaft 84, and is engaged with the drive groove of the reverse plate 78. Further, a spring 81 having a center wound around a shaft 84 is attached to the T-shaped plate 80. The spring 81 is biased in the direction of pinching, and when one end engages with the pinch arm 37, the other end engages with the spring stopper 80b of the T-shaped plate. Conversely, when the tip on the opposite side engages with the pinch arm 38, the other side engages with the spring stopper 80a.
The pinch arms 37 and 38 are pivotally supported on the chassis by shafts 37a and 38a, respectively, and pivotally support the pinch rollers 31 and 32. In the illustrated state, one end of the spring 81 engages with the pinch arm 37 to move the pinch roller 31 to the capstan 35.
Are pressed against. Therefore, the tape 23 is sent in the direction indicated by the solid line arrow. At this time, the T-shaped plate 80 receives the urging force from the spring 81 through the spring stopper 80b, and the force is applied in the counterclockwise direction. That is transmitted to the roller 82 → reverse plate 78 → drive pin 76 → reverse gear 72.
However, the reverse gear 72 does not rotate because the reverse trigger arm 70 is engaged with the stopper 73a.

Here, the program selection operation is selected as described above,
When the link member 18 moves downward in the drawing, the trigger arm 70 rotates clockwise about the shaft 70a against the bias of the spring 74, and the trigger arm 70 and the stopper 73a are disengaged. Since the reverse gear 72 receives the biasing force of the spring 81, it rotates slightly clockwise, and the intermittent portion 71a moves to the drive gear 7
The gear part disengages from 5, and the drive gear 75 meshes. Therefore, the motor M is driven to continue rotation, and the intermittent portion 71b
Stops facing the drive gear 75. Drive gear like this
When 75 rotates half a turn, drive pin 76 reverse plate 78
The reverse plate 78 is moved rightward by the guide elongated holes guided by the projections 85 and 86. Along with that, the T-shaped plate 80 rotates counterclockwise, tilts in the opposite direction to that shown, one end of the spring 81 pushes the pinch arm 38, and the arm 38 rotates clockwise about the shaft 38a. The pinch roller 32 contacts the capstan 36 and stops. That is, the state shown by the dotted line is realized, and the tape 23 is fed in the direction of the dotted arrow. The other side of the spring 81 is engaged with the spring stopper 80a when the pinch arm 37 is returned and the tilt of the T-shaped plate 80 increases.

Referring to FIG. 11, assuming that the gear 14 meshes with the gear 13 as shown by the solid line and the pinch roller 31 is advanced to reproduce the surface A, the above program switching operation is performed. By the movement of 78 (see FIG. 8), the driven member 17 engaged with this rotates in the direction shown by the chain line, and the gear 14 meshes with the gear 15. That is, the reproduction of the B side shown by the dotted line in the figure is started. On the contrary, if the above program switching operation is performed while the surface B shown by the dotted line in the figure is being reproduced, the driven member 17 is also rotated by the movement of the reverse plate 78 in the direction shown by the solid line. Gear 14 is gear
It meshes with 13, and the pinch roller 31 advances and the reproduction of the A side is started.

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

〔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 drive transmission means of each operation mode only by controlling the operation time of one solenoid. Therefore, since many solenoids are not required, the tape recorder using this device becomes extremely compact and inexpensive.

[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 diagram, FIG. 4 is a diagram for explaining the relationship between the time chart of the solenoid and the rotation angle of the rotating body, FIGS. 5 to 8 are diagrams showing the operating state of the apparatus of the above-mentioned embodiment, and FIG. 9 to FIG.
FIG. 11 is a diagram 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-forward 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, FF …… Fast forward RWD …… Reverse fast forward PRG …… Program, OFF …… Stop

Claims (1)

[Claims] 1. A single solenoid that operates for different lengths of time in accordance with an operation mode selection operation, a single rotating body that is rotated by releasing a stopper when the operation of the solenoid is started, and the rotating body. The body has a plurality of cams having the same number of selectable operation modes and different drive start times according to the respective operation modes, and a driven member corresponding to the cams. A cam suitable for the operation mode among the plurality of cams drives the driven member by actuation of the solenoid for a time period corresponding to each operation mode, and the driven member drives and discontinues the drive transmission means in each operation mode. An operation mode selection switching device of a tape recorder characterized by the above.