JPH0823946B2 - 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. There is also a mechanism called the EJECT mechanism, which has a mechanism for ejecting a cassette tape pack from the device with built-in power.

For example, when the fast-forward 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 attached to the tape 23.
Not to interfere with high speed running away from.

When the reverse reverse fast-forward 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, the rotation is transmitted from the gear 15 through the gear 16 and the gear 27, the 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.

When the eject mechanism works, the first
2 The lever 65 rotates counterclockwise around the shaft 66 from the position shown in FIG. 2 (a), the gear 67 is connected to the drive motor M and meshes with the gear 68 that is rotationally driven, and the motor M →
The rotational drive is transmitted in the order of gear 68 → gear 67 → gear 69 → cam gear 70. The rotation of the cam gear 70 causes the cam 72 to push the roller 75. As shown in the side view of FIG. 12 (b), the roller 75 is pivotally supported by the eject lever 76.
76 moves in the direction of the arrow. Tip of eject lever 76
76a pushes the roller 78 pivotally supported by the link plate 80, and the link plate 80 rotates about the shaft 81 in the counterclockwise direction. Pack holders 82 and 83 are fixedly mounted on the link plate 80 to support the cassette tape pack 85.
Is discharged to the position indicated by the chain line.

Conventionally, when selecting an operation mode such as fast-forward or rewind or operating the eject mechanism, the number of solenoids corresponding to the operation mode is provided, and the operation mode is switched by operating each solenoid. . For example, in order to operate the eject mechanism shown in FIG. 12, a solenoid (not shown) is engaged with the lever 65 and the solenoid is suctioned to rotate the lever 65.

[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 is applied for solving the above problems will be described with reference to FIG. 1 corresponding to an embodiment.

As shown in the figure, an operation mode selection switching device of a tape recorder to which the present invention is applied selects each operation in a tape recorder having at least a fast-forward operation, a reverse fast-forward operation, a program switching operation, and an eject mechanism operation. One solenoid 1 which is controlled and operated according to an operation, one rotating body 3 which is rotated by releasing the stopper 2 when the operation of the solenoid is started, and both sides of the rotating body 3 are provided with A plurality of cams 9.10.8.4 that are the same in number and have different drive start times according to the respective operations,
The driven members 5 and 6 corresponding to the cams 9, 10 and 8 and 4 are provided, and the plurality of cams 9 and 10 according to the respective operations by the operation of the solenoid 1 while the rotating body 3 is rotating. A cam suitable for the operation in 8.4 drives the driven members 5 and 6, and a specific operation can be selected from among the above operations by the driven member.

[Action]

It is the actuation of the solenoid 1 for a time corresponding to each operation mode that guides the driven start of the driven member 5 or the driven member 6 of the cam 9, the cam 10, the cam 8 or the cam 4 according to each operation mode. . Therefore, one solenoid 1
It is possible to switch the drive transmission means 12 or 18, 19 for each operation mode simply by controlling the operating time. The operation selected from the fast-forward operation, reverse-reverse fast-forward operation, program switching operation, and eject mechanism operation starts.

〔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 between RG mode and EJECT 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, and 11 is a positioning connected to the second driven member 6. Reference numeral 12 is a bar, 12 is a reel drive gear connected to the motor M, 18 is a program switching link member, and 19 is an eject operation link member.

A pin 42 is implanted in the plunger 41 of the solenoid 1. State shown (state where solenoid 1 is not sucking)
However, the pin 42 and the second driven member 6 are slightly separated from each other, and do not prevent the driven member 6 from rotating in the counterclockwise direction. However, if the solenoid 1 attracts, the driven member 6 engages with the driven member 6 and rotates in the clockwise direction. It is designed to be rotated.

An embodiment of a circuit for controlling and driving the solenoid 1 is shown in FIG. 2, and switches FF, RWD, P for selecting each mode are provided.
RG and EJECT, and switch OFF to stop fast forward or reverse fast forward. When each switch is pressed, timer circuit 4
ON signals with different timing from 0 can be output. The switching transistor Q is turned on by the ON signal, and the drive voltage V ₊ is applied to the solenoid 1.

The details of the rotating body 3 are shown in FIG.
The center of rotation is, and the side surface is an intermittent gear. On the upper surface of the rotating body 3, the cam 8, the cam 4, the rotation guide portion 47, the guide portion 47
A first stopper protrusion 43 and a second stopper protrusion 44, and a first pin 48 and a second pin 49 projecting from the are fixedly provided, respectively.
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 4 is 4a, the cam surface of the cam 9 is 9a, and the cam surface of the cam 10 is 10a. The spacing pitch between the first intermittent portion 3a and the second intermittent portion 3b of the gear is set to match the spacing pitch between the first stopper protrusion 43 and the second stopper protrusion 44. The same applies to the pitch between the first pin 48 and the second pin 49. In the neutral state, as shown in FIG. 1, the first intermittent portion 3a faces the drive gear 7. A spring 50 attached to the chassis is engaged with the first pin 48 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 bar 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 first stopper projection 43 of the rotating body 3, stops rotation of the driven member 6, and is urged to rotate by a spring 50. Three
Has been stopped.

The positioning bar 11 is rotatably connected to the second driven member 6 by a shaft 60. A spring 61 is attached between the positioning bar 11 and the driven member 6, and the opening angle shown in the figure is stable, but it can be further opened. A roller 62 is attached to the tip portion of the positioning bar 11 and is engaged with the tip portion 54 of the driven member 5.

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

The eject operation link member 19 is on the opposite side of the program switching link member 18, and is pushed when the second driven member 6 rotates in the counterclockwise direction. And the link member 19
Engages with the rotating lever 65 of the eject mechanism shown in FIG.

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 is disengaged from the first stopper protrusion 43, and the spring 50 The rotating body 3 is slightly rotated by the biasing force of. Then, the first intermittent portion 3a of the rotating body 3 moves, the gear portion meshes with the drive gear 7, and the rotating body 3 then rotates about 270 ° and stops until the second intermittent portion 3b faces the drive gear 7. When the rotation starts, the suction of the solenoid 1 stops and the rotation 45
At about °, the cam surface 9a of the cam 9 is the protrusion of the first driven member 5.
When it reaches 53, 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,
When the driven member 5 continues to rotate by the cam 9 and the chain line shown in FIG. 5 changes to the solid line, the reel drive gear 12 moves to the gear 13
Start meshing fast feed operation. At this time, the engagement between the roller 62 of the positioning bar 11 and the tip portion 54 of the first driven member 5 is released, and the second driven member 6 and the positioning bar 11 are rotated counterclockwise by the spring 59. Roller 62 is concave 55
Engage with. In the rotating body 3, the second intermittent portion 3b is the drive gear 7
The rotation is stopped until the second stopper protrusion 44 engages with the stopper pin 2 of the driven member 6. Then, in this state during the fast-forwarding period, the operation mode as shown in FIG. 9 is continued.

《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 makes one rotation, the cam 9 causes the first driven member 5 to rotate once in the clockwise direction so that the concave portion 55 faces the roller 62, but the solenoid 1 is attracting and the second driven member 6 is being rotated. Since the positioning bar 11 is rotated in the clockwise direction, it does not engage. When the rotor 3 further rotates and the suction of the solenoid 1 is stopped after the cam 9 has passed through the projection 53 of the first driven member 5, the second driven member 6 returns in the counterclockwise direction and the roller 62 causes the tip portion 55 to move. Return to. Rotating body 3
Rotation continues, the cam surface 10a of the cam 10 reaches the protrusion 53,
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. At this time, the positioning bar 11 is rotated by the spring 59 in the counterclockwise direction, and the roller 62 engages with the recessed portion 56. The rotating body 3 continues to rotate and stops until the second stopper protrusion 44 engages with the stopper pin 2. Then, in this state during the reverse rotation fast-forward period, the operation mode as shown in FIG. 10 is continued.

<< Stop (OFF) operation >> To stop it during the fast-forward operation (or reverse-reverse fast-forward operation), press the switch OFF in Fig. 2.
The solenoid 1 draws in the ON signal from the timer circuit 40. During the fast-forwarding operation, the stopper pin 2 of the second driven member 6 engages with the second stopper protrusion 44, the spring 50 engages with the second pin 49, and the second intermittent portion 3b faces the drive gear 7. are doing. Since the solenoid 1 attracts from this state, the driven member 6 rotates clockwise and the stopper pin 2 and the second
The stopper projection 44 is disengaged, and the rotating body 3 is rotated by the urging force of the spring 50, and the gear portion thereof meshes with the drive gear 7 and continues to rotate. While the solenoid 1 attracts only as shown in OFF in FIG. 4, the driven member 6 maintains the rotated state, and the pin 2 is guided between the cam 4 and the cam 8. Here, when the suction of the solenoid 1 is stopped, the rotating body 3 moves to the cam 4
Until the pin 2 rotates along the outer surface 4b of the first and the first intermittent portion 3a faces the drive gear 7, that is, the first stopper protrusion 43.
Continues to rotate until it engages the stopper pin 2 and stops. This returns everything to a neutral state.

Since there is no work by the cam surface 9a, the cam 10a, the cam surface 8a, or the cam surface 4a during this stop operation, it is necessary to induce another operation such that the reel drive gear 12 meshes with the gear 13 or the gear 15. Without stopping, you can move to playback.

<< 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. When sucked, first, the pin 2 is disengaged from the first stopper protrusion, the rotating body 3 biased by the spring 50 via the first pin 48 rotates, the gear portion meshes with the drive gear 7, and the rotating body 3 rotates. 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. Then, the first driven member 5 is in the same state as the neutral state ( Return to the state where gear 12 is not engaged. The cam surface 8a of the cam 8 is the second
The pin 2 of the driven member 6 is reached, the cam surface 8a pushes the pin 2, and the driven member 6 starts rotating 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 program switching link member 18 as shown in FIG.

As shown by the solid line in FIG. 10, 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.
The movement of the link member 18 causes the driven member 17 to rotate in the direction shown by the chain line so that the gear 14 meshes with the gear 15 and the pinch roller 32.
Moves into contact with the tape 23. That is, the reproduction of the B side shown by the dotted line in the figure is started. Conversely, B shown by the dotted line in the figure
If the above program switching operation is performed while the surface is being reproduced, the movement of the link member 18 also causes the driven member 17 to rotate in the direction shown by the solid line so that the gear 14 meshes with the gear 13 and the pinch occurs. The roller 31 advances and the reproduction of side A is started.

As shown in FIG. 7, after the pin 2 is pushed by the cam surface 8a to push and move the link member 18, the rotating body 3 is further rotated. The pin 2 follows the outer surface of the cam 8 and then the cam 4
The driven member 6 returns along the outer surface 4b. Immediately before hitting the stopper protrusion 43, the intermittent portion 3a faces the drive gear 7, and the rotation of the rotating body 3 is stopped. That is, it returns to the neutral state.

<< EJECT operation >> The eject operation starts from the neutral state of FIG. When the switch EJECT in Fig. 2 is pressed, the timer circuit 4
With the ON signal from 0, the solenoid 1 draws twice as indicated by EJECT in FIG. The pin 2 is disengaged from the first stopper projection 43 by the first suction start, and the rotating body 3 urged by the spring 50 via the first pin 48 slightly rotates and the gear portion of the rotating body 3 becomes the drive gear 7. When meshed, the rotating body 3 starts rotating. 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. Then, the first driven member 5 is in the same state as the neutral state ( gear
12 returns to the non-engaged state. When the solenoid 1 finishes suction before the rotation of the rotating body 3 continues and the cam surface 8a of the cam 8 reaches the pin 2 of the second driven member 6, the pin 2
Is along the rotation guide portion 47. Then, when the second intermittent portion 3b faces the drive gear 7, that is, immediately before the second stopper protrusion 44 contacts the stopper pin 2, the solenoid 1 sucks the second time. As a result, the pin 2 jumps over the second stopper projection 43, the rotating body 3 biased by the spring 50 via the second pin 49 rotates, the gear portion meshes with the drive gear 7, and the rotating body 3 starts rotating. . At this time, the solenoid 1 immediately stops sucking, and the second driven member 6 returns. The pin 2 is pushed by the cam surface 4a of the rotating cam 4, and the driven member 6 starts rotating in the counterclockwise direction. At this time, as shown in FIG. 8, the positioning bar 11 is in contact with the front end portion 54 of the first driven member 5, but the driven member 6 forms an angle with the driven member 6 about the shaft 60. The eject operation link member 19 is pushed and moved by rotating without being disturbed. When the rotating body 3 rotates and the tip of the cam surface 4a passes by, the pin 2 will rotate into the rotation guide portion.
The driven member 6 is rotated in the clockwise direction by coming into contact with the cam surface 47a of 47 and being pushed up. Immediately before hitting the first stopper protrusion 43, the intermittent portion 3a faces the drive gear 7, and the rotation of the rotating body 3 stops. That is, it returns to the neutral state.

When the eject operation link member 19 is pushed and moved as described above, the eject mechanism shown in FIG. 12 operates to eject the cassette tape pack 85 from the solid line position to the chain line position.

Although the independent timer circuit 40 is used to control the operation time of the solenoid 1 in the above-mentioned embodiment, it is also possible to control the operation time by sharing a microcomputer for controlling other devices.

〔The invention's effect〕

As described above, in the operation mode selection switching device of the tape recorder to which the present invention is applied, the cam suitable for the operation mode is operated from among a plurality of cams by controlling the operation of one solenoid, and each operation mode is selected. The drive transmission means can be switched. Since the plurality of cams are arranged on both sides of one rotating body in this way, it is feasible. 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. 12 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 4,8,9,10 ... Cam 11 ... Positioning bar 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 …… Program switching link member 19 …… Eject operation link member 40… … Timer circuit FF …… Fast forward, RWD …… Reverse fast forward, PRG …… Program OFF …… Stop EJECT …… Eject

Claims (1)

[Claims] 1. A tape recorder having at least a fast-forward operation, a reverse fast-forward operation, a program switching operation, and an eject mechanism operation, and one solenoid controlled and operated according to an operation for selecting each operation, and the solenoid. The stopper is released when the operation of
A plurality of rotating bodies, a plurality of cams on both surfaces of the rotating body, the cams having the same number as that of the respective operations and different drive start times according to the respective operations, and a driven member corresponding to the cams. During the rotation of the rotating body, a cam suitable for the operation among the plurality of cams corresponding to the respective operations is driven by the operation of the solenoid, and the driven member drives the driven member. Operation mode selection switching device that can select a specific operation.