JPS6021415B2 - Operation switching device for tape recorders, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operation switching device for a tape recorder or the like, and is of a feather touch type using a plunger solenoid.

Feather-touch type tape recorders and the like use plunger solenoids to perform various switching operations, but conventionally, large-capacity plunger solenoids are required, and their power consumption is extremely large.

Therefore, it has been difficult to implement feather-touch attachments in battery-powered tape recorders and the like. The present invention was invented to correct the above-mentioned defects, and although the desired switching is performed using a plunger solenoid,
This plunger solenoid is prevented from being subjected to a large mechanical load as much as possible, resulting in extremely low power consumption. ,
The idea is to provide something that runs on dry batteries.

An embodiment in which the present invention is applied to a small tape recorder for a small cassette (micro cassette) will be described below with reference to the drawings.

First of all, this small tape recorder is a battery-powered Feather Touch, and uses two AA batteries as a power source.
It operates with ultra-low current consumption and requires only the use of a book.

The main reason for this is that the movable iron core of the plunger solenoid is used in contact with the fixed iron core.
The reason is that it is possible to mechanically hold several hundred grams using a current of several milliamps. Next, the overall outline of the small tape recorder will be explained with reference to FIGS. 1 and 2.
1 is a capstan, 2a and 2b are a supply groove and a pair of reel stands for winding, 3 is a pinch roller, 4 is a head board,
Reference numeral 5 indicates a re-scanning head, and 6 indicates an erasing head, which are mounted on a mechanical board 7.

[However, the head 5 is mounted on the head substrate 4. ] 9 is a cassette, which is positioned by three positioning pins 10 attached to the capstan 1 and both reel stands 2a and 2b. Then, the head substrate 4 is moved to the first position by the sliding operation of the setup slider 11, which will be described later.
In the figure, it is advanced from the backward movement position indicated by the solid line to the home position indicated by the chain line, thereby inserting the pinch roller 3, greening head 5, and erasing head 6 into the cassette 9, and crimping them onto the cab stun. The tape 12 is contacted. On the other hand, this 4.
The type tape recorder uses two motors: a recording/reproducing motor 14 and a fast forward/rewind motor 15.

One motor 14 rotates a capstan flywheel 17 via a belt 16, and the other motor 1
5 rotationally drives an idler 19 for fast forward/rewind switching via an idler drive mechanism 18. Note that the take-up reel stand 2b is rotationally driven by the capstan 1 via an idler 20. Note that 21 is a main gear rotationally driven by the cab stun gear 22. In addition, this small tape recorder has a plunger solenoid 24 for switching playback.
Two plunger solenoids are used: a plunger solenoid and a recording switching gate plunger solenoid 25. Then the third
The regeneration switching device will be explained with reference to FIGS.

First, to explain the outline of this recycling switching bag straight, the plunger solenoid 24 includes a fixed iron core 27 made of a magnetic material and having a substantially U-shape, and a coil 28 wound around a part of the fixed iron core 27. and a movable iron core 29 made of a magnetic material.

Then, the movable iron core 29 is crimped onto the fixed iron core 27 and passed through the coil 28, and the movable iron core 29 can be separated from the fixed iron core 27 by cutting off the current supply to the coil 28. On the other hand, the drive source of this regeneration switching device is the main gear 2 driven by the capstan 1.
It is 1.

This main gear 21 drives a rack 33 of a setup lever 32 by a pinion 31 provided integrally therewith, and the setup slider 11 is slid to the set position by this setup lever 32. At this time, the engaged state of the rack 33 with the pinion 301 is maintained via the regeneration slider 34 and the lock lever 35 by the passage of the plunger solenoid 24. Then, the head board slider 36 is moved by the setup slider 11.
The head substrate 4 is advanced to the forward movement position via. Note that 37 is a forced slider for forcibly crimping the movable iron core 29 to the fixed iron core 27, and is controlled by the setup slider 11 and the timing slider 38. Further, the movable iron core 29 is attached to the tip 34a of the regeneration slider 34 via a support shaft 39, and is attached to a spring 40.
It is biased to protrude toward the fixed iron core 27 side. Next, the switching operation of this regeneration switching device will be explained.
In the stopped state as shown in the figure, the forced slider 37 urged in the direction of arrow a by the spring 41 urges the lock lever 35 in the direction of arrow b about the fulcrum shaft 42. The rotation of the lock lever 35 is regulated via the regeneration slider 34 by a guide/stopper pin 112 of the regeneration slider 34. Then, the lock lever 35 is connected to the roller 43 and the innermost hole 4.
4 through the playback slider 34 against the spring 45 and arrow c
It's pushing in the direction. As a result, the movable iron core 29 is crimped to the fixed iron core 27 by four springs. Therefore spring 4
The power relationship between 1 and 45 is 41>45. Also, at this time, the tip 35a of the lock lever 35 pushes the setup lever 32, forcing it in the direction of arrow d about the potato shaft 46.

As a result, the rack 33 of the setup lever 32 is engaged with the pinion 31 and maintained in this state. Note that the fulcrum 46 is attached to a part of the setup slider 1. Next, when the regeneration nail switch is turned on in this stopped state, the coil 2 of the plunger solenoid 24
8 is energized and the motor 14 is driven.

When the coil 28 is energized, the movable iron core 29 is fixed in a crimped state to the fixed iron core 27 by the electromagnetic force of the fixed iron core 27. At this time, the movable iron core 29 is attached to the fixed iron core 27 in advance, and there is no gap between them, so the movable iron core 29 is fixed to the fixed iron core 27 by a very weak electromagnetic force. . Therefore, the current flowing through the coil 28 is extremely small (several milliamps). As a result, the engaged state of the rack 33 with the pinion 31 is maintained via the regeneration slider 34 and the lock lever 35.
On the other hand, the capstan flywheel 1 is driven by the motor 14.
7 is rotated, and the main gear 21 starts rotating in the direction of arrow e via the capstan gear 22.

Then, the rack 33 is driven by the pinion 31, and the setup lever 32 is pulled in the direction of arrow f, and the setup lever 32 moves the setup slider 1.
1 begins to slide against the spring 47 in the direction of arrow g. At this time, due to the rotational moment when the rack 33 is driven by the pinion 31, the setup lever 32 is pushed in the direction of the arrow, and the rack 33 tries to escape from the pinion 31, but the tip 35a of the lock lever 35 Since the setup lever 32 is held down, the rack 33 will not come off the pinion 31.

When the setup slider 11 starts to move in the direction of the arrow g, the setup slider 1 first moves as shown in FIG.
The slope 49 provided at the tip 11a of the forced slider 3
7 is pushed, the projection 50 is guided by the slope 49, and the forced slider 37 is moved back in the direction of the arrow against the spring 41.

Note that due to the retreat of this forced slider 37, the tip end 37a of this forced slider 37.

From that moment on, the setup lever 32 is prevented from escaping from the pinion 31 only by the electromagnetic holding force of the plunger solenoid 24. When the forced slider 37 is retracted to the position shown in FIG.
1 and locks it in its retracted position.

On the other hand, the timing slider 38 is moved by the arrow h by the spring 52.
A pin 53 provided in a part of the pin 53 is energized in the direction
It is attached to a protrusion 54 provided on a part of the setup slider 11. Therefore, at the same time as the setup slider 11 slides in the direction of arrow g, the timing slider 38 also tries to slide in the direction of arrow h, but initially its tip 38a hits the protrusion 50 of the forced slider 37. This contact prevents sliding in the direction of arrow h. When the forced slider 37 is retracted to the position shown in FIG. 5, its tip 38a comes off the protrusion 50. At that moment, the timing slider 38 is slid in the direction of the arrow h by the spring 52, and its tip 38a touches the protrusion 5 as shown in FIG.
0, and from now on this timing slider 3
8 serves as a baffle plate that obstructs the forced slider 37 from sliding in the direction of arrow a. By the way, when the setup slider 11 reaches the set position as shown in FIG. 6, the notch 56 provided in the setup lever 32 reaches the alignment of the tip 35a of the lock lever 35.

At that moment, the setup lever 32 is rotated in the direction of the arrow d' by the rotational moment applied thereto, and the tip 35a of the lock lever 35 relatively enters the notch 56. As a result, the setup lever 32 is locked by the lock lever 35, and the setup slider 11 is locked in its set position. On the other hand, as shown in FIG. 7, before the setup slider 11 starts sliding in the direction of the arrow g, the head substrate slider 36
is urged in the direction of arrow i by the spring 57, and the head substrate 4 is retracted to the return position.

Note that the head substrate 4 is attached to the head substrate slider 3 by a spring 58 stretched between the head substrate slider 36 and the head substrate 4.
6 in the direction of arrow i', and is abutted against a pin 59 attached to the head substrate slider 36. When the setup slider 11 is slid in the direction of the arrow g as described above, the setup slider 11 is moved as shown in FIG.
The slope 60 provided on a part of the head substrate slider 36
Pushes the roller 61 pivotally connected to the roller 61, and the roller 61 is guided by this slope 60, and the head board slider 36 is moved against the spring 5.
7 in the direction of arrow i'.

Then, the head substrate 4 is moved by the head substrate slider 36 via the spring 58 in the direction of the arrow i', that is, moved forward in the forward and straight directions indicated by the chain line in FIG. Please note that the setup slider
When 11 reaches the set position, the roller 61 rides up from the slope 60 of the setup slider 11 onto the step 62, and
Thereafter, this head substrate slider 36 is locked at the set position. Further, the head board 4 is connected to the stopper 63 and one cassette positioning pin 10 by the force of the spring 58.
The person is brought into contact with the person and the Ima is decided using Oshiki Itaka. As the head substrate 4 moves forward as shown by the chain line in FIG. pin 11 provided in
3, counterfeiting is regulated.

As a result, the pinch roller lever 66 is rotated about the fulcrum shaft 67 in the direction of the arrow j'.
The pinch roller 3, which is pivotally attached to the tip of the pinch roller 6, is attached to the capstan 1 in the cassette 9. The erasing head 5 is advanced by the head substrate 4, inserted into the cassette 9, and comes into contact with the tape 12, but the erasing head 6 is not advanced at this time. In addition, regarding the movement of the setup slider 11 (for example, by forming a cam surface on the setup slider 11 and engaging a lever that pivotally supports the idler 20 on the cam surface), the eighth As shown in the figure, the idler 20 is pressed between the capstan flywheel 17 and the take-up reel stand 2b, and the take-up reel stand 2b is driven to rotate. As a result of the above, the 4-inch tape recorder is switched to the playback state, and the tape 12 of the cassette 9 is run at a constant speed in the direction of arrow k in FIG. 1, thereby performing the desired generation.

Next, when the stop button switch is turned on in this state, the coil 28 is de-energized and the motor 14 is stopped.

Then, as the coil 28 is de-energized, the electromagnetic holding force of the plunger solenoid 24 is cut off.
In FIG. 6, the regeneration slider 34, like the chain edge, is pulled back in the direction of the arrow by the spring 45.

As a result, the movable iron core 29 is separated from the fixed iron core 27, and the lock lever 35 is pulled back in the direction of arrow b'. At this time, since the pin 48 serves as a stopper for the setup lever 32, the tip 35a of the lock lever 35 comes off the notch 56 of the setup lever 32, and the setup lever 32 is unlocked.
The setup slider 11 is then pulled back in the direction of arrow g by the spring 47 and moved back to the return position shown in FIG. At this time, as the setup slider 11 is moved back, the forced slider 37 that has been riding on the edge 51 of the setup slider 11 is temporarily moved to the tip 31 of the timing slider 38.
Move onto 8a.

Immediately before the setup slider 11 is moved back to the return position shown in FIG.
Figure returns and pushes back to the road. As a result, the tip 38a of the timing slider 38 comes off the protrusion 50 of the forced slider 37. At that moment, the forced slider 37, which had been retreated to the position shown in FIG. 5 as shown in FIG. 4, is moved forward again in the direction of arrow a by the spring 41. Then, the tip 37a of the forced slider 37 pushes the lock lever 35, and the lock lever 35 is rotated again in the direction of arrow b. As a result, the regeneration slider 34 is moved forward again in the direction of arrow c against the spring 45, and the movable iron core 29 is moved again to the fixed iron core 27.
will be appointed. Further, the tip 35a of the lock lever 35 pushes the setup lever 32 again, and this setup lever 32 is rotated again in the direction of arrow d, and the rack 3
3 is again engaged with the pinion 31 and held in that state. By the way, as the setup slider 11 is moved backward, the head substrate slider 36 is pulled back in the direction of the arrow i' by the spring 57, and is moved back to the backward movement shown in FIG.

At this time, the head substrate 4 is pushed back by the pin 59, and is also moved double to the backward movement position shown in FIG. At this time, the pinch roller lever 6'6 is rotated in the direction of arrow j by the pin 113 provided on the head substrate 4 via the pinch roller pressure spring 65, and the pinch roller 3 is separated from the capstan 1. In conjunction with the return movement of the slider 11, the idler 20 is separated from between the capstan flywheel 17 and the take-up reel stand 26. As described above, this small tape recorder is switched from the playback state to the stop state.

Next, the recording switching operation will be explained with reference to FIGS. 9 to 12.

First, to explain the outline of this record switching bag counterfeiting, the plunger solenoid 25 is composed of a fixed iron core 71, a coil 72, and a movable iron core 73, like the plunger solenoid 24, and is also similar to the plunger solenoid 24. take action.

On the other hand, this recording switching device is provided with a green re-switch 75 composed of a slide switch.

Note that this mirror re-switch 75 is switched to the recording side in the stopped state, and when switching to the recording state, the mirror re-switch 75 is switched to the recording side via the recording hold slider 76 and the recording/reproducing switching slider 77 by the electromagnetic hold force of the plunger solenoid 25. m) retained. Further, when switching to the above-mentioned playback state, the green re-switching slider 77 is moved by the green re-switching lever 78 which operates in conjunction with the advancement of the head substrate 4.
can be switched to the playback side via . Further, the erasing head 6
A magnetic erase head is constructed, and is attached to an erase head slider 79. Then, when switching to the recording state, it is advanced and inserted into the cassette 9. The movable iron core 73 is slidably attached to a portion 76a on the distal end side of the recording hold slider 76 via a support shaft 80, and is urged by a spring 81 to protrude from the 71 fixed iron cores. Next, to explain the switching operation of this recording switching device, first, in the stopped state shown in FIG. ing. As a result, the bride reswitching lever 78 is biased in the direction of the arrow 1 about the fulcrum shaft 84 against the spring 85, and the other end biases the recording hold slider 76 in the direction of the arrow m through the roller 86 and the elongated hole 87. are doing. As a result, the movable iron core 73 is moved to the fixed iron core 7 by the spring 81.
It is attached to 1. Further, a protrusion 88 provided on a part of the head substrate 4 comes into contact with a protrusion 89 provided on a part of the tip 79a of the erasing head slider 79, and the spring 90
The force is energized in the direction of arrow m' in opposition to the force. The green reswitching slider 77 is engaged with a roller 91 pivotally mounted between the fulcrum shaft 84 of the greens reswitching lever 78 and the 086 through a long hole 92, and is biased in the direction of arrow m. There is. The green reswitching slider 77 is engaged with the slider 75a of the greens reswitch 75 through a notch 93 provided in a portion thereof, and switches the slider 75a to the recording side.
Next, when the above-mentioned reproducing state is switched in this stopped state, as the head board 4 moves forward in the direction of arrow i' as shown in FIG. The recording hold slider 76
Both the recording/reproducing switching slider 77 are pulled in the direction of arrow m'.

As a result, the slider 75a of the coin reswitch 75 is quickly switched to the playback side by the edge reswitching slider 77. At this time, since the distance between the fulcrum shaft 84 and the switch 91 is short, the mirror re-switching slider 77 is pulled relatively strongly in the direction of the arrow m' by the lever principle, and the slider 7 of the green re-switch 75 is pulled relatively strongly in the direction of the arrow m'.
5a can be reliably switched. At the same time, a protrusion 95 provided on a part of the recording hold slider 76 comes into contact with the tip 79a of the erase head slider 79, and quickly pushes it down in the direction of arrow m' against the spring 90, so that the erase head 6 is inserted into the cassette. Prevent it from being inserted into 9. Note that the head board 4 is switched to the stopped state again and the head board 4 is moved in the direction of the arrow i.
When the recording/reproducing switching lever 78 is pushed back in the direction of the arrow 1, the recording hold slider 76 and the recording/reproducing switching slider 77 are pushed back in the direction of the arrow m.

Then, the green re-switch 75 is switched to the recording side again, and the movable iron core 73 is again crimped to the fixed iron core 71.
By the way, when the recording plow switch is turned on in the stopped state to switch to the recording state, the switching to the reproducing state described above is performed with the coil 72 of the plunger solenoid 25 energized.

When the coil 72 is threaded, the movable iron core 73 is fixed to the fixed iron core 71 by the electromagnetic force of the fixed iron core 71.

That is, due to the electromagnetic holding force of the plunger solenoid 25, the recording hold slider 76 moves in the direction of the arrow m as shown in FIG.
It is held in a state where it is pulled in the direction. The recording hold slider 76 holds the twill reswitching slider 77 via the green reswitching lever 78, and the green reswitch 75 is held on the recording side. On the other hand, as the protrusion 88 of the head substrate 4 is moved forward in the direction of the arrow i', the protrusion 89 of the erase head slider 79 is also moved forward in the direction of the arrow m by the spring 90, and the erase head 6 is moved forward in the direction of the arrow m.
the tape 12. As described above, this small tape recorder is switched to the recording state and desired recording is performed. Note that when the state is switched to the stopped state again, the head substrate 4 is moved back in the direction of the arrow i, so that the erasing head slider 79 moves in the direction of the arrow m as shown in FIG.
The erasing head 6 is pushed back in the direction ', and the erasing head 6 is pulled out of the cassette 9. Next, referring to FIGS. 13 to 16, a description will be given of the fast forwarding and rewinding switching bag straightening.

First, the motor 15 used in this fast forward/rewind switching device is configured to be capable of forward and reverse rotation.

The idler 19 is rotatably supported on an idler shaft 98 which is stepped at one end of the swing lever 97. Note that a roller 99 is pivotally attached to the rising edge of the aid shaft 98. On the other hand, a nodal shaft 101 is rotatably supported by an intermediate shaft 100 that is shielded on the mechanical board 7, and an intermediate pulley 102 is fixed to the upper end of the cylindrical shaft 101.
A drive gear 103 provided on the lower surface of the hydraulic gear 19 is engaged with a gear 104 provided on the outer periphery of the hydraulic gear 19. The other end of the swing lever 97 is inserted into the lower end side of the general shaft 101, and is configured to swing freely around the joint 101 as a fulcrum. Note that the motor 15 rotationally drives the intermediate pulley 102 via a belt 105. Further, a flange plate 106 is integrally provided at the lower end of the cylinder shaft 101. The end of the swing lever 97 is connected to the flange plate 1 by the limiter 107.
06 is frictionally engaged. Furthermore, this limiter 10
Reference numeral 7 denotes an integrated friction plate 108 having transparent frictional force superimposed above and below the swing lever 97, and these are connected to the flange plate 10.
The spring 109' is energized on the 6th side. Next, to explain the switching operation of this fast forward/rewind switching device, first, during fast forwarding, the motor 15 is driven to rotate in the forward direction, the drive gear 103 is driven to rotate in the direction of the arrow o as shown in FIG. It is rotated in the p direction. However, at this time, the swinging lever 97 is swung in the direction of arrow q by the bonito urushi rotational force of the glue emitter 107, and the idler 1
9 moves toward the take-up reel stand 2b and meshes with a gear 109 provided on the outer periphery of the take-up reel stand 2b.
As a result, the take-up reel stand 2b is rotated at high speed in the direction of arrow r, and the desired tape is rapidly fed. Next, during rewinding, the motor 16 is driven to rotate in reverse, the drive gear 103 is driven to rotate in reverse in the direction of arrow o' as shown in FIG. 16, and the idler 19 is rotated in reverse in the direction of arrow p'.

However, at this time, the swinging lever 97 swings in the direction of arrow q' due to the frictional rotational force of the limiter 107, and the idler 1
The supply reel 9 moves to the supply reel stand 2a side and is fused with the gear 110 provided on the outer periphery of the supply reel stand 2a.
As a result, the combined reel stand 2a is driven to rotate at high speed in the direction of arrow r', and desired tape rewinding is performed. Note that during the above-mentioned reproduction (or recording), the head substrate slider 36 is advanced to the setting position indicated by the chain line in FIG. .

As a result, the idler 19 moves both reel stands 2a. The idler 19 is held at an intermediate position between the reel stands 2a and 2b.
This prevents accidental meshing with b. Next, the drive circuit of this small tape recorder will be explained with reference to FIG.

First, in this drive circuit, when the regeneration plow switch SW is turned on, a control signal is output to output terminals 0 and Q of the system control circuit, and the motor 14 is driven and the plunger solenoid 24 is activated. When the power is applied, the switch to the above-mentioned playback state is performed.

Next, when the recording nail switch SW2 is turned on, the output device 0 of the system control circuit. Control signals are output to , Q, and 03 to drive the motor 14, and simultaneously energize the two plunger solenoids 24 and 25 to switch to the recording and state described above.

Similarly, when the table feed button switch SW3 is turned on, a control signal is sent to the output terminal P3, and the motor I5 is driven to rotate forward, and when the rewind button switch SW4 is turned on, a control signal is sent to the output terminal P3. is output, and the motor 15 is driven to rotate in reverse.

It should be noted that when the stop nail switch SW5 is turned on, the control signals of all output types ○, ~05 are cut off.

The pause button switch SW6 is configured as a so-called push-push switch, and when the pause button switch SW8 is turned on during playback or recording, the control signal of the output terminal ○ is cut off and the motor 14 is stopped. be done. If regeneration is in progress, plunger solenoid 2
4 remains energized, and during recording, both plunger solenoids 24 and 25 are kept energized. On the other hand, this small tape recorder uses the following pause system.

That is, as shown in FIGS. 7 and 8, when the head substrate 4 is in the backward position (reverse position) or in the middle of forward movement, it is off, and the head substrate 4 is in the forward position (
A pause changeover switch SW7 is provided which is turned on just before reaching the forward sardine position), and when this pause changeover switch SW' is off, the motor 14 is placed in a drivable state, and this pause changeover switch SW7 is turned on. In particular, the motor 14 is configured to be stopped. In FIGS. 7 and 8, the pose changeover switch SW7 is driven by the tip 36a of the head substrate slider 36. Also, this pause changeover switch SW7 actually serves as the power supply for the amplifier, but in Fig. 17,
When this pause changeover switch SW7 is in the off state,
The movable contact A is switched to the fixed contact B side, and at this time the motor 14 is placed in a driveable state. Further, when this pause changeover switch SW7 is in the ON state, its movable contact A is switched to the fixed contact C side, the servo circuit of the motor 14 is grounded, and the motor 14 is stopped. There is. According to the pause system configured in this way, when performing splicing, for example, when the pause plow switch SW6 is first turned on and then the recording plow switch SW2 is turned on, the motor 14 is turned on.
is driven to start setting to the recording pause state, and just before the head substrate 4 reaches the forward position, the pause switch SW7 is turned off, the motor 14 is stopped, and the setting to the recording pause state is completed.

At this time, the position of the roller 69, which is pivotally attached to one of the pinch roller levers 66, is regulated by the straight line portion 68' following the slope 68 of the setup slider 11, causing a pinch. The roller 3 is not pressed by the capstan 1 and is held at a separate position.
Next, when the post-pause plow switch SW6 is turned off, the motor 14 is driven again, the head board 4 is instantly advanced to the forward position, and the pinch roller lever is activated by the linear portion 68' of the setup slider 11. Since the &hawk restriction of 66 is released, the pinch roller 3 is pressed against the capstan 1, is instantly switched to the recording state, and recording is quickly started. Although the embodiments of the present invention have been described above, the present invention is not limited to tape recorders, but can be applied to VTRs and other various recording and reproducing devices.

Furthermore, various modifications are possible based on the technical idea of the present invention. By the way, in conventional feather-touch tape recorders that use a plunger solenoid, the plunger solenoid is used as a mechanical trigger to mechanically switch various mode switching mechanisms. A large mechanical load is always applied to the plunger solenoid.

Therefore, the plunger solenoid requires a large amount of power commensurate with its load, and the power consumption required to drive it requires a large fin force of at least 6 to 9 volts. For this reason, it is difficult to drive the feather-touch type of the sub-chassis using Inuikaike, and commercial power is generally used. Furthermore, since the plunger solenoid itself is relatively large, it is not possible to downsize the entire diamond counterfeit, and the actual situation is that it cannot be applied to, for example, a pocketable size. However, the present invention provides a plan in which a movable iron core (for example, the movable iron core 29 shown in FIG. 4) can be attached to and separated from a fixed iron core (for example, the fixed iron core 27 shown in FIG. 4). A plunger solenoid (for example, the plunger solenoid 24 shown in FIG. 4) and a pinion (for example, the pinion 31 shown in FIG. 4) driven by a carbstan disturbance motor (for example, the motor 14 shown in FIG. 1). ) that can be engaged with and separated from the rack (for example, the rack 33 shown in FIG. 4), a head board (for example, the head board 4 shown in FIG. 1) driven by this rack, and the movable iron core. a spring (for example, the spring 41 shown in FIG. 4) that presses the rack to the fixed iron core;
For example, the lock lever 35 and force slider 37 shown in FIG. 4), the regeneration plow switch (for example, the regeneration wholesale switch SW, shown in FIG. 17), and the fast forward plow switch (for example, the fast forward wholesale switch shown in FIG. 17). SW3) and a rewind plow switch (e.g. rewind nail switch S shown in FIG. 17).
W4), a reel stand driving motor (for example, the motor 15 shown in FIG. 1), and a swing lever that swings in the rotational direction of this motor (for example, the swing lever 97 shown in FIG. 13).
and an intermediate rotary body (for example, the idler 119 shown in FIG. 13) rotatably supported by the regeneration sword switch.By operating the regeneration sword switch, the motor for driving the cab stan is driven and the plunger solenoid is energized. The movable iron core, which is attached to the fixed iron core by the spring, is further electromagnetically fixed, and the position of the mesh holding means is fixed by the movable iron core, so that the movable iron core is fixed to the pinion. The head board is moved forward by engaging and holding the rack, and the reel stand driving motor is rotated in a first direction by operating the fast-forward nail switch, and this rotation causes the intermediate rotating body to move. The take-up reel stand (for example, reel stand 2b shown in FIG. 13) is crimped, and the reel stand driving motor is rotated in a second direction by operating the rewind button switch. This rotation presses the intermediate rotating body onto a supply reel stand (for example, the reel stand 2a shown in FIG. 13).

Therefore, according to the present invention, the desired switching is performed by driving the rack with the pinion driven by the capstan drive motor, but at this time, the plunger solenoid simply moves the rack against the pinion. It is used only for the purpose of holding the trigger in the engaged state, and is not used as a mechanical trigger at all.

For this reason, the force of the plunger solenoid only needs to be extremely weak. Furthermore, the above object is achieved by applying electricity while the movable iron core is crimped to the fixed iron core, and the electromagnetic force of the fixed iron core causes an electromagnetic holding force to fix the movable iron core to the fixed iron core. Therefore, for example, 7 to 10
A large force of, for example, about 200 grams can be easily obtained using a milliampere current. Furthermore, according to the present invention, the reel stand and the take-up reel stand can be selectively driven by switching the rotational direction of the motor for driving the reel stand, so that the reel stand and the take-up reel stand are selectively driven. A mechanical switching mechanism for selectively driving the pair of reel stands is not required at all, and the switching mechanism does not apply any load to the plunger solenoid.

Therefore, according to the present invention, although it is a feather touch type, it consumes extremely little power and operates extremely reliably with dry batteries. Furthermore, since the plunger solenoid itself can be significantly downsized, the entire device can be made smaller and lighter. As described above, it has the great advantage of being able to realize a battery-powered Feather Touch device that is compact and of a pocketable size. Brief Description of the Drawings The drawings show an embodiment in which the present invention is applied to a small tape recorder, in which Fig. 1 is a plan view of the entire device, and Fig. 2 is a perspective view of the capstan and reel stand drive section. Figure 3 is an exploded perspective view of the regeneration switching device, Figures 4-
FIG. 8 is a plan view illustrating the switching operation of the reproduction switching device, FIG. 9 is an exploded perspective view of the recording switching bag/counterfeit portion, and FIGS. 10 to 12 are plan views illustrating the switching operation of the recording switching device. Fig. 13 is a plan view of the fast forward/rewind switching device portion, Fig. 14 is an enlarged sectional view taken along line XW-XW in Fig. 13,
FIGS. 15 and 16 are plan views of essential parts for explaining the fast forward/rewind switching operation, and FIG. 17 is a drive circuit diagram.

In addition, in the symbols used in the drawings, 2a, 2b... reel stand, 11... setup slider, 14...
... Recording and reproducing motor, 15... Fast forwarding and rewinding motor, 18... Idler drive mechanism, 1
9...Idler for fast forwarding and rewinding switching, 21.
... Main gear, 24 ... Plunger solenoid for regeneration switching, 27 ... Fixed iron core,
28... Coil, 29... Movable iron core,
31... Pinion, 32... Setup lever, 33... Rack, 35... Lock lever, 41...
Spring, 97... Swing lever, 37... Forced slider, SW. ...Play button switch, SW3...
...Fast forward button switch, SW4...Rewind plow switch.

Figure 1 Figure 2 Figure 3 Figure 4 Figure 9 Figure 5 Figure 13 Figure 6 Figure 14 Figure 7 Figure 15 Figure 8 Figure 16 Figure 10 Figure 17 Figure 11 Figure 12

Claims (1)

[Claims] 1. A plunger solenoid in which a movable iron core is crimped to a fixed iron core so that it can be freely separated from the plunger solenoid, a rack that can be engaged with and can be freely separated from a pinion driven by a capstan drive motor, and a solenoid that is driven by this rack. a head board, a spring for press-fitting the movable iron core to the fixed iron core, and mesh holding means for holding the rack in mesh with the pinion;
It consists of a playback button switch, a fast forward button switch, a rewind button switch, a reel stand driving motor, and an intermediate rotating body rotatably supported by a swinging lever that swings in the rotational direction of the motor. By operating the regeneration button switch, the capstan driving motor is driven, and the plunger solenoid is energized to further electromagnetically move the movable iron core, which is crimped to the fixed iron core by the spring. and fixing the position of the mesh holding means with the movable iron core so that the pinion meshes and holds the rack to move the head board forward, and operates the fast forward button switch. The reel stand driving motor is rotated in a first direction, and this rotation causes the intermediate rotating body to be crimped onto the take-up reel stand, and by operating the rewind button switch, the reel An operation switching device for a tape recorder or the like, configured to rotate a table drive motor in a second direction and press the intermediate rotating body to the supply reel table by this rotation.