JPS6117250A - Switching mechanism of tape recorder - Google Patents

Abstract

PURPOSE:To simplify extremely the constitution by constituting the titled mechanism so that a tape recorder is set to a different mode in accordance with the fact that a control member is in the first and the second positions. CONSTITUTION:In case a pause operating member which is not shown in the figure has been operated in a tape constant speed running state, if an electric conduction time to a solenoid plunger 48 is set in advance to the time when a lock part 461 is detached from a detaining part 587, and a gear 58 is rotated and interposed between the outside peripheral wall of a guide groove 585 and a branch wall 59, a stop state on the way can be skipped. In this case, if the mechanism is constituted so that rotation of a motor 16 is stopped, a pause state can be realized by the same constitution.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is particularly suitable for logic-oriented tape recorders, and relates to improvements in the switching mechanism thereof.

Recently, there has been a trend towards logic in tape recorders, and development in this direction has been actively carried out.

This logic-based tail coder has a touch switch structure for multiple operators that put the tape recorder into a predetermined operating state or stop state, and an LSI dedicated to controlling the tape recorder.
etc., to control an electro-mechanical converter such as a solenoid plunger, etc., to move various movable members of the Teso recorder mechanism to positions where they operate or stop in accordance with the operated operator. be. And according to such a mouth/knock tape recorder,
Since the operator can have a touch switch structure, it is possible to naturally realize soft-touch operation of the tape recorder operator, and the control means for driving the solenoid silane that corresponds to the operation of the operator is a dedicated LS1.
Only one tape recorder is required, and compared to conventional fully mechanical tape recorders, the structure is simpler, smaller, lighter, and can be manufactured at lower cost.

By the way, the tape recorders mentioned above are still in the early stages of development.1) For example, in terms of operation,
There is a strong demand for detailed development in order to fully meet the needs of users in terms of structure, maintenance, and power consumption such as solenoid sealant.

The present invention has been made based on the above circumstances, and an object of the present invention is to provide an extremely good tape recorder switching mechanism that has a simple configuration, consumes little power, and is especially suitable for small portable tape recorders.

Before describing one embodiment of the present invention, the basic structure of a cassette tape recorder to which the present invention is applied will be described below. That is, in FIG. 1, reference numeral 11 denotes a main chassis formed of a metal material and having a substantially rectangular shape. A pair of reel stands 12, 13 are rotatably supported at approximately the center of the main chassis 11. The pair of reel stands 12 and 13 each have large diameter gears 14 and 15, respectively.

It is installed coaxially.

Further, a tape running motor (see FIG. 2) 16 is provided approximately on the perpendicular bisector of the straight line connecting the rotational axes of the reel stands 12 and 13, and at the top in FIG. . The rotation shaft 16 of this motor 16 is connected to the main chassis 1.
It protrudes toward the surface of the gear 17 and is fitted into the center of rotation of the gear 17. A friction member 18 is provided on the front side of the main chassis 11 in the form of a ring surrounding the rotation of the gear 17 and having a protrusion 181 at the lower part in FIG. The friction member 18 is interlocked with the gear 17 with an appropriate frictional force, and is biased in the directions of arrows A and B in the figure depending on the rotational direction of the gear 12. A rotation shaft 182 is embedded in the protrusion 18 of the friction member 18, and the rotation shaft 182 is connected to the gear 17.
It rotatably supports a gear 19 that is always in mesh with the gear.

Here, when the gear 17 is rotated counterclockwise in the figure by the motor 16, the friction member 18 is urged in the direction of arrow B, the gear 19 meshes with the gear 15, and the reel stand 13 is rotated counterclockwise in the figure. Rotated to.

It will be done. Further, when the gear 17 is rotated clockwise in the figure,
Similarly, the gear 19 meshes with the gear 14, and the reel stand 12 is rotated clockwise in the figure, allowing the deso (not shown here) to run in forward and reverse directions. Further, the motor 16 is connected to an operation member (not shown) for tape constant speed running (recording,
playback) and operating members for high-speed tape running (fast forwarding).

It is controlled by a timeless electronic governor circuit or the like so that the rotational speed and direction of rotation change according to the rewinding operation. There is also an operating member for stopping tape running (as shown in the figure) with the operating member for constant speed and high speed running of the tape.
(including pause) have a touch switch structure, and when these are operated, the electronic governor circuit is controlled by an LSIK (not shown) dedicated to controlling the Teso recorder, and the motor 16 corresponding to the operation is controlled. It is possible to obtain rotation and stop conditions.

Next, in the lower central part of the main chassis 11 in FIG.
They are arranged in parallel so that they can slide freely in the D direction. This head chassis 2o has one L-shaped end 201 directed toward the gear 19.

Main chassis 1 with the other end 202 facing leftward in the figure.
1 is installed in parallel. and.

One end part 5toxlt of the helad chassis 20 is cut into two parts, and one part 203 is inserted into the slide part 1Jl formed by outsert-forming a synthetic resin material into the main chassis 11. Arrow C in figure 1,
It is supported so as to be slidable in the D direction.

Further, the head mounting body 201C (indicated by a group of minute dots in the figure) formed by molding a synthetic resin material is attached from the corner to the other end 202 of the herad chassis 201C. An erasing head 22 is attached to the left side of the head mounting body 21 in the figure, and a recording/playback head 2 is attached to the right side of the figure.
3 is attached. The head attachment body 21 also includes an east wire section 21.1.21 for bundling lead wires (not shown) extending from the erasing head 22 and the recording/reproducing head 23.
2.213 is formed.

Here, a long, substantially rectangular recess 214 is formed along the direction of the one end 201 in a portion of the head mounting body 2 corresponding to the recording/reproducing head 23, and a sphere 215 is loosely fitted into the recess 214. has been done. Moreover, in the part of the main chassis 11 corresponding to the corner of the above-mentioned Herad chassis 2o.

A slide portion 11 having substantially the same shape as the slide portion 111 described above.
2 is formed as an outsert. Then, both ends of the substantially rectangular leaf spring 24 are connected to the slide portions 111 and 112.
The intermediate portion of the plate spring 24 is inserted into the sphere 2.
15, the head chassis '20 is mounted on the main chassis 1 by slightly raising the height and supporting the head chassis '20 on the opposite side.
1.

Furthermore, a head slider 25 is arranged in parallel between the above-mentioned head chassis 20 and the main chassis 11 so as to be slidable in the directions of arrows C and D in the figure. This head slider 2
5 are arranged in parallel from one end 201 of the helad chassis 20 to the corner K, and the one end 25 is inserted into and supported by the slide portion 112. Also.

The other end portion 252 of the head slider 25 is bent approximately perpendicularly from the surface of the head slider 25, and a bent engagement piece 253 is inserted through the through hole 113 formed in the main chassis 11 and projects to the back side. (See FIG. 2) Since the width ib of the post-reading through-hole inserted through the through-hole 113 is also made wide, the head slider 25 is attached to the main chassis 11.
It is supported so that it can slide freely.

The Herad slider 25 has a spring 2 between a bent locking piece 254 formed on one side thereof and a retaining piece 114 formed as an outsert on the main chassis 1.
6 is engaged, it is biased in the direction of the arrow in the figure.

Also, there is a gap K between the bent locking piece 255 formed on the other side of the Herado slider 25 and the through hole 204 formed on the inner corner of the head chassis 20.

The head chassis 20 is interlocked with the Herad slider 25 by being engaged with the spring 27. Further, a bent locking piece 256 formed on the other side of the Herado slider 25 is inserted into the through hole 204 of the head chassis 20. Therefore, when the RAD slider 25 is now slid by an external force in the direction of the arrow C° against the biasing force of the spring 26, the head chassis 20 is also pulled by the spring 27 and moved in the same direction. In addition, if the above external force is removed in this state, the head slider 2
5 is slid in the direction of the arrow by the spring 26, and at this time, the bent locking piece 256 of the Rad slider 25 engages with the edge of the through hole 204 of the head chassis 20, so the head chassis 20 also slides in the direction of the arrow. It is something that will be done.

Here, a pinch roller 28 is provided on the right side of the head chassis 200 on the main chassis 11 in the drawing. This pinch roller 28 is rotatably supported by one end of a pinch lever 29 whose side surface is bent into a substantially U-shape, and the other end of this pinch lever 29 is installed in the main chassis 1. It is rotatably supported on a rotating shaft 115. Further, the head mounting body 21 is extended to the pinch roller 28 side, and the extended portion has two parts.
Two locking portions 216 and 217 are provided in a protruding manner. and,
The pinch lever 29 has one end locked to the locking part 216 and wound around the rotating shaft 115, and the other end is locked to the pinch lever 29.
It is biased clockwise in FIG. 9 by a torsion sedge ring 30 that is engaged with the back side of the holder. This pinch lever 290 rotations is a pinch.

The locking piece 291 formed at one end of the lever 29 is held until it comes into contact with the locking portion 2xvKa. As described above, when the head chassis 20 is slid in the direction of the arrow C, the pinch lever 29 is also rotated clockwise due to the biasing force of the torsion gear ring 30, and the pinch lever 29 is moved clockwise to the capstan 31. The pinch roller 28 is pressed against it. This capstan 31 serves as a rotating shaft for a flywheel 320 shown in FIG. 2, and is inserted into the main chassis 1 from the back side to the front side so as to be rotatable without wobbling.

Further, on the left side of the head chassis 2θ of the main chassis 1 in the figure, an eject member 33 is supported so as to be slidable in the directions of arrows E and F in the figure. This eject member 33 is formed in a substantially rod shape and is disposed from the upper end to the lower end of the main chassis 11 in the figure. Then, the eject member 3. ? , a substantially T-shaped through hole 33 formed at one end thereof is connected to a slide portion
Next, after mating Fc.

The shaft 1 noa formed in the main chassis 1 is slidably supported by a rear presser ring 118 which is loosely inserted into a through hole 332 of the shape shown in the figure formed at the other end. . Further, the eject member 33 has a bent locking piece 33 formed approximately at the center thereof.
3 and a retaining shaft 119 formed on the main chassis IIK outsert, a spring 34 is engaged and biased in the direction of arrow F.

Here, a locking portion 334 is formed at one end of the ejecting member 33 and protrudes substantially perpendicularly to the surface of the main chassis 11.

When the cassette lid (not shown), which is biased in the direction of the normally open state, is closed, a portion of the cassette lid is locked by the lock portion 334.

The cassette lid remains closed. Here, as mentioned earlier, the plurality of operators that set this cassette TESO recorder in a predetermined operating state and stop state have a touch switch structure, but when the cassette lid is in a closed state, The Inoect operator (not shown) for performing this operation has a mechanical structure such as a Zossi set or a piano touch type, for example. When the iso-exit operator is operated, the eject member 33 is slid in the direction of the arrow E against the biasing force of the spring 34, either directly or indirectly in conjunction with this operation.

Then, the lock portion 334 of the ejecting member 33 separates from the cassette lid, and the cassette lid is opened.

Also, on the main chassis lJ.

Near one end of the eject member 33, an erroneous erasure prevention switch 35 and a force detection switch 36 are provided.

Next, the structure of the back side of the main chassis 11 will be explained in FIG. 2. First, on the back side of the main chassis 11, at a portion where the pair of reel stands 12 and 13 are supported, there is a braking member 37 having a symmetrical shape as indicated by the arrow G in FIG.

It is supported so as to be slidable in the H direction. This braking member 37 has engaging pieces 371 and 37 formed at both ends thereof.
2 is a long hole 373.37 formed in the main chassis 11
4 through the elongated hole 37 on the front side of the main chassis 11.
3, 374, and its central portion is sandwiched between the motor 16 and the main chassis 11, thereby being slidably supported. The braking member 37 is loosely fitted into the elongated hole 375 formed approximately at the center thereof.

The center part of the roller is wound around a shaft 376 formed on the main chassis 11, and both ends are connected to the braking member 37.
It is normally biased in the direction of arrow H by a torsion spring 38 that is engaged with engagement pieces 377 and 3711 formed on both sides of.

Here, the movement of the braking member 37 due to the urging force in the direction of the arrow H is achieved through the elongated holes 373 provided at both ends of the braking member 370.
, 374 and protrude toward the surface side of the main chassis 11.
Braked rings 12J, J3 formed coaxially with
7 (see the construction drawing). Therefore, under normal conditions, the one-car reel stand is 12°/3.
It is braked to prevent it from rotating. Furthermore, a protrusion 379 extending downward in FIG. 2 is formed approximately at the center of the braking member 87. The tip of this protrusion 379 faces the bent engagement piece 253 of the head slide 25.

Next, a small-diameter gear 40 is formed coaxially and integrally with the flywheel 32 . This flywheel 32 is connected to a motor 4 separate from the motor J6 via a belt 42 so as to be able to transmit rotational force to the motor 4,
1 and is rotated at a constant speed clockwise in the figure. A large-diameter gear 43 that can mesh with the gear 40 is rotatably supported on the right side of the gear 4θ of the main chassis 11 in the drawing.

This gear 43 has two notches 431 and 432 formed at predetermined positions that do not mesh with the gear 40. Also,
A cam portion 434 is formed on one surface of the gear 43 facing the main chassis 1. The cam portion 434 has a flat portion 433 in one portion and is curved in the shape shown in the figure in the other portion. Then, the cam portion 434 and the bent engagement piece 2 of the slider 25
53, there is a drive lever 44 as shown in FIG.
One end of is interposed. The drive lever 44 is rotatably supported by the main chassis 11 at its intermediate portion by a screw 441. Then, the drive lever 44
teeth.

A through hole 442 formed on the side thereof, a main shear,
A susoling ring 444 is engaged between the engaging piece 443 formed on the side 11 and is biased counterclockwise in the figure. Further, the other end of the drive lever 44 can be engaged with a leaf switch 45. When this switch 45 is turned on, the motor 16
For example, a control signal is generated to the aforementioned LSI exclusively for controlling the chip recorder so as to bring the tape into a rotating state corresponding to constant speed tape running.

On the other hand, a substantially ring-shaped guide groove 435 is formed on the other surface of the gear 43. Two locking portions 436, 437 are formed at predetermined positions on the inner peripheral wall of the guide groove 435, and two step portions 438, 439 are formed on the outer cylinder wall at positions substantially opposite to the locking portions 436, 437. is formed.

The lock portion 46 is loosely fitted into the guide groove 435.
A lock member 46 in the shape of an abbreviation with a mark formed at one end is
The corner portion thereof is rotatably supported by a rotation shaft 462 formed as an outsert in the main chassis 11. A pin 464 is formed at the other end of the locking member 46 and extends through a substantially arc-shaped through hole 463 formed in the main chassis 11 and projects toward the surface of the main chassis 11. One end of the locking member 46 is engaged with a pin 465 protruding from the other end, and the other end is a retainer that is outsert formed in the main chassis 1 by winding the rotation shaft 462. It is normally biased counterclockwise in the figure by a torsion spring 467 that is engaged with the joint portion 466.

Here, as shown in FIG. 2, in a state where the lock portion 461 of the lock member 46 is engaged with the locking portion 436 of the guide groove 435, one end portion of the drive lever 44 is
The drive lever 4 comes into contact with the flat part 433 of the cam part 434.
As a result, the gear 43 is biased counterclockwise in the figure due to the biasing force applied by the spring 444 to the gear 43, but since the locking portion 461 is engaged with the locking portion 436, Gear 430 rotation is blocked.

As shown in FIG. 3, one end of a lock/release lever 47 is rotatably connected to one end of the lock member 46. As shown in FIG. The lock release lever 47 is supported at its center by a rotation shaft 471 formed as an outsert in the main chassis 11 so as to be freely rotatable to the left. The other end of the lock release lever 47 is connected to a drive piece 481 of the solenoid plunger 48.

Here, a gear 49 that can mesh with the gear 40 of the flywheel 32 is rotatably supported on the left side of the gear 40 of the flywheel 32 in the main chassis 11 in FIG. This gear 49 has a notch 491 formed at a predetermined position that does not mesh with the gear 40. In addition, the gear 49
A cam portion 493 having a flat portion 492 in a portion thereof and having a curved portion in the shape shown in the figure is formed on one surface facing the main chassis 11 . Then, the cam portion 493
As shown in FIG. 4, one end of the drive lever 50 is located near the drive lever 50, as shown in FIG. This drive lever 50 is rotatably supported by the main chassis 11 by a screw 501 at its intermediate portion. Then, the drive lever 50 is
A spring 504 is engaged between a through hole 502 formed at the other end and a retaining piece 503 formed on the main chassis IllIC outsert, so that the spring 504 is biased counterclockwise in the figure. ing. In addition, the drive lever 50
The other end can be secured to the leaf switch 51. When this switch 51 is turned on, the motor 1
6 in a rotating state that corresponds to high-speed tape running.
A control signal is generated to the LSI dedicated to controlling the tape recorder.

Here, as shown in FIG. 4, a head return lever 52 is attached to the drive lever 50 so as to overlap with it. This head return lever 52 rotates around a screw 501 coaxially with the drive lever 50, one end of which extends beyond the drive lever 50, and the tip of the extension is shaped like the main chassis 11Vc. It is a bent engagement piece 522 (see FIGS. 1 and 2) that extends through the long hole 521 and projects toward the front surface of the main chassis 11. The bent engagement piece 522 is again opposed to the retaining piece 2θ5 formed protruding from the side of the head chassis 20, as shown in FIG.

Furthermore, a bottle 505 is provided protruding from the other end of the drive lever 50, as shown in FIG. One end engages with this pin 505, and the other end engages with the center of the bottom of the braking member 37 (see FIG. 4), and the rotation shaft formed in the main chassis IIK outsert approximately at the center thereof. 53
A brake release lever 5 rotatably supported by
3 is provided.

On the other hand, on the other side of the gear 49, there is a cam portion 49 which is approximately circular and has two locking portions 494, 4°95 formed at predetermined positions.
6 is formed. Furthermore, two guide walls 497 and 498 having the shapes shown in the figure are formed on the other surface of the gear 49 at positions substantially facing the locking portions 494 and 495. A locking member 54 in the shape of an abbreviated character having one end formed with a locking portion 54 capable of engaging with the cam portion 496 is attached to a rotation shaft 542 formed as an outsert on the main chassis 11 at the other end. , rotatably supported. This locking member 54 is connected to the drive piece 551 of the solenoid planter 55 at its corner, and has a locking piece 543 formed at the corner and a retaining piece 544 formed as an outsert on the main chassis 11. A spring 545 is engaged between the two and is biased counterclockwise in FIG.

Here, as shown in FIG. 2, in a state in which the lock portion 541 of the lock member 54 is engaged with the locking portion 494 of the cam portion 496, one end portion of the drive lever 50 is connected to the cam portion 493. The drive lever 50 comes into contact with the flat portion 492 .
Due to the biasing force applied by the spring 504,
As a result, the gear 49 is biased counterclockwise in the figure, but since the lock portion 54 is engaged with the locking portion 494, rotation of the gear 49 is prevented. First, the operation of the cassette tape recorder constructed as described above in a deep constant speed running state will be explained in detail. Now, assuming that the cassette tape recorder is in a stopped state, the gear 43 is in a position where its notch 431 faces the gear 40, as shown in FIG. 5, and in this position, as described above, Although the gear 430 is urged counterclockwise in FIG. 5 by the drive lever 44, the locking portion 436 is locked with the locking portion 461 of the locking member 46, so that the gear 430 is prevented from rotating. In this state, when the power switch (not shown) of the cassette tape recorder is turned on, the motor 4 is energized and the motor 41 is turned on.
is driven in rotation. For this reason, the flywheel 3
2 and gear 40 are rotated clockwise in FIG. 5, but are not yet meshed with gear 43.

In this state, it is assumed that, for example, a reproduction operation member (touch switch structure), not shown, is operated as an operation member for running the tape at a constant speed. Then, the L8I determines that this playback operation member has been operated, and the LSI outputs a solenoid silansha 48tlC drive signal and also sends a control signal (not shown) to switch the tape recorder circuit section to the playback state. Output. When the solenoid syringe 48 is driven, the driving piece 481 is retracted as shown in FIG.

Therefore, the lock release lever 47 is rotated counterclockwise in the figure, and the lock member 46 connected to the lock release lever 47 is rotated clockwise in the figure against the biasing force of the torsion spring 467. Ru. Then, the lock member 46
The locking portion 461 of the gear 43 is disengaged from the locking portion 436 of the gear 43, and the gear 43 is rotated slightly counterclockwise in the figure by the urging force previously applied from the drive lever 44.
It meshes with.

Thereafter, the gear 43 is rotated counterclockwise in the figure by the rotational force of the gear 400, as shown in FIG.

Therefore, one end of the drive lever 44 is pushed up by the curved portion of the cam portion 434, and the drive lever 44 is rotated clockwise in the figure against the biasing force of the spring 444. Then, the drop portion of the drive lever 44 comes into contact with the bent engagement piece 253 of the Herado slider 25, and moves the head slider 25 upward in the figure. Therefore, as described above, the head chassis 20, which is in an interlocking relationship with the head slider 25, is also slid upward in FIG. 1. At this time, the bent engagement piece 253 comes into contact with the protrusion 379 of the brake member 37 and pushes the brake member 37 upward in FIG. 2.

Here, the solenoid sealant 48 is energized and driven for the time required for the locking part 461 of the locking member 46 to disengage from the locking part 436 of the gear 43, and after disengaging, the drive piece 48 is The solenoid can be freely moved in and out of the solenoid 48 by external force. Therefore, after the locking portion 461 is released from the locking portion 436, it is pressed against the inner circumferential wall of the guide groove 435 by the urging force applied to the locking member 46 by the torsion spring 467.

Therefore, as the gear 43 rotates, the locking portion 461 of the locking member 46 is locked with the locking portion 437 of the gear 43, as shown in FIG. At this time, when the notch 432 of the gear 43 is in a position facing the gear 40, the gear 43 no longer meshes with the gear 40, and the rotation of the gear 43 is stopped.

Also, at this time, one end of the drive lever 44 is connected to the cam portion 4.
34 is pushed up as far as possible in the figure, and one end of the drive lever 44 comes into contact with the contact point between the curved part of the cam part 434 and the flat part 433 as shown in the figure, and the biasing force of the spring 444 is applied. As a result, the gear 43 is biased counterclockwise in the figure, but the lock portion 46
1 is locked by the locking portion 4.97, rotation of the gear 43 is prevented.

In this state, the head slider 25 and the braking member 37 are also pushed up as far as possible in the figure, and the head chassis 20 is also slid as far upward as in FIG. 1, and the erasing head 22. The recording/reproducing head 23 is brought into contact with a tape (not shown), and the one pinch roller 28 is brought into contact with the canostan 31KHE via the tape. At the same time, the brake elements 391 and 392 of the brake member 37 are separated from the braked rings 121 and 131 of the reel stand 12.13, and the reel stand 12.13 is no longer braked. Furthermore, at this time, the leaf switch f4s (see Figure 112) is turned on by the other end of the drive lever 44, so the motor 16 is rotated at a rotational speed and rotational direction corresponding to the tape constant speed running state, and the reel stand J2 .13 is rotated, and stable tape playback is performed here.

Here) When a recording operation member (touch switch structure) (not shown) is operated as an operation member for tape constant speed running, the LSI outputs a drive signal to the solenoid silencer 48, and the tape recorder circuit section is activated to record the tape. Outputs a control signal to switch according to the state. Then, the head chassis 20 is moved in the same manner as described above, and safe recording is performed. .

Further, suppose that a stop operation member (not shown) (touch switch structure) is operated in the tape playback state as described above. Then, the LSI determines that the stop operation member has been operated while the tape is running at a constant speed, and operates the solenoid planter 4.
8, the drive signal is output again. When this solenoid sealant 48 is driven, as shown in FIG.
6 is released from the locking portion 437 of the gear 43. Then,
The gear 43 is rotated counterclockwise in the figure by the biasing force applied by the drive lever 44, and the gear 43 is rotated again with the locking part 436 being engaged with the locking part 461 as shown in FIG. 43 is prevented from rotating. At this time, since the drive lever 44 is rotated counterclockwise in the figure by the biasing force of the spring 444, the head slider 25 is also rotated by the spring 26 (
1) and the braking member 37 is also returned to its original position, the head chassis 20 and the pinch roller 28 are returned to their original positions, and the first brake 39
1, ,? 92 is the reel stand 12. The leaf switch 45 is pressed against the braked rings 121 and 131 of No. 3, and the rotation of the motor 16 and the reel stand 12, 13 is stopped, and the cassette tape recorder also comes to a halted state.

Here, in the tape playback state shown in FIG. 8, when the lock portion 46 is released from the locking portion 437, the gear formed between the notch portions 421 and 432 of the gear 43 as shown in FIG. The portion meshes with the gear 40, and the rotating penetration of the flywheel 320 suppresses the biasing force of the drive lever 44 of the gear 43 in the counterclockwise direction in the figure, so that the locking portion 431 is not struck by the locking portion 46. being done.

Furthermore, the same explanation as above can be given when the stop operation member is operated in the tape recording state.

Next, the operation in a tape running state at high speed will be explained. Now, assuming that the cassette tape recorder is in a stopped state, the gear 49 is in a position where its notch 49 faces the gear 40, as shown in Fig. 1a10, and in this position, as described above, Although the driving lever 50 is biased counterclockwise in FIG. 10, the locking portion 494 is locked to the locking portion 541 of the locking member 54, so that the gear 490 is prevented from rotating. When the power switch is turned on in this state, the motor 41 is driven to rotate as described above, and the gear 40 is rotated clockwise in FIG. 10, but it is not engaged with the gear 49.

In this state, it is assumed that, for example, a fast forward operation member (touch switch structure), not shown, is operated as an operation member for high-speed tape running. Then, the LSI determines that the fast forward operation member has been operated, and outputs a drive signal to the solenoid silencer 55. When the solenoid sealant 55 is driven, the driving piece 551 is retracted as shown in FIG. is rotated.

Then, the locking portion 541 of the locking member 54 disengages from the locking portion 494 of the gear 49, and the gear 49 first engages the drive lever 5.
It is rotated slightly counterclockwise in the figure by the biasing force applied from θ, and here it meshes with the gear 40.

Thereafter, the gear 49 is rotated counterclockwise in the figure by the rotational force of the gear 40, as shown in FIG. Therefore, one end of the drive lever 5o is pushed by the curved portion of the cam portion 493, and the drive lever 50 is rotated clockwise in the figure against the biasing force of the spring 5θ4. Then, the pin 505 of the drive lever 50 pushes one end of the brake release lever 53, and the brake release lever 53 is rotated counterclockwise in the figure. Therefore, the brake release lever 53
The other end comes into contact with the center of the bottom of the brake member 37, and pushes the brake member 37 upward in the figure against the biasing force of the torsion spring 38.

Here, the solenoid plunger 55 is also energized and driven for the time required for the locking portion 54 of the locking member 54 to disengage from the locking portion 494 of the cam portion 496, like the solenoid glander 48. After detachment, the drive piece 551 is moved in and out of the lenoid sealant 48 by an external force. Therefore, after the locking portion 541 is released from the locking portion 494, it is suppressed by the peripheral wall of the cam portion 496 due to the biasing force applied to the locking member 54 by the spring 545VC.

Therefore, as the rotation of the gear 49 progresses, the locking portion 541 of the locking member 54 locks onto the cam portion 49 as shown in FIG.
It is locked by the locking part 495 of 6. When the gear 49 is in a position where the notch 49 of the gear 49 faces the gear 40, the gear 4
9 no longer meshes with the gear 4θ, and the rotation of the gear 49 is stopped. Also, at this time, the drive lever 5o is in the most rotated state in the clockwise direction in the figure.
As shown in the figure, one end comes into contact with the contact point between the curved part of the cam part 493 and the flat part 492, and as a result, the gear 49 is urged counterclockwise in the figure by the biasing force of the spring 504. However, since the lock portion 541 is locked to the locking portion 495, rotation of the gear 49 is prevented.

In this state, the brake member 37 is pushed up as far as it can be seen in the figure, and the brake elements 391 and 392 move toward the reel stand 1.
2. It is completely separated from the braked rings 12 and 131 of 13, and no brake is applied to the reel stands 12 and 13. Furthermore, at this time, the leaf switch 51 (see Figure 2) is turned on by the other end of the drive lever 5θ, and the LSI has previously determined that the fast-forward operation member has been operated. In particular, the motor 16 is rotated at a rotational speed and direction corresponding to the Tezo fast-forwarding state, and the reel bases 12 and 13 are rotated, thereby achieving stable fast-forwarding. .

Here, when a rewinding operation member (not shown) (touch switch structure When the leaf switch 51 is turned on, the LSI determines whether the rewinding operation member is operated or not, so the motor 16 is rotated at a speed and direction corresponding to the tape rewinding state.
This allows stable rewinding of the chive.

Further, assume that the stop operation member is operated in the above-mentioned fast-forward state. Then, the LSI is fast forwarded)
In this state, it is determined that the stop operation member has been operated, and a drive signal is outputted to the solenoid sealant 56 again. When the solenoid grandeur 55 is driven, the drive piece 55 is retracted and the lock portion 541 of the lock member 54 is pulled in.
is released from the locking portion 495 of the cam portion 496.

Then, the gear 49 is rotated counterclockwise in the figure by the biasing force applied by the drive lever 5011C, and the locking part 494 is locked with the locking part 541 again as shown in FIG. In this state, the gear 49 is prevented from rotating. At this time, the drive lever 50 is rotated counterclockwise in the figure by the biasing force of the spring 504, so the brake release lever 53
At t/C, no force is applied in the clockwise direction in the figure, and the braking member 37 is returned to its original position by the biasing force of the torsion spring 38, and the reel stands 12 and 13 are braked.

At this time, leaf switch 5 is also turned off and motor 1 is turned off.
The rotation of the cassette tape recorder 6 is stopped, and the operation of the cassette tape recorder is stopped.

Furthermore, the same explanation as above can be given when the stop operation member is operated in the tape rewinding state.

Next, the operation when a pause (for temporarily stopping tape running) operation member (touch switch structure) not shown is operated will be described. That is, when the tape is running at a constant speed, as shown in FIG. 8, the head P slider 25 is located at the uppermost position in the figure, and the head chassis 20 is located at the uppermost position in FIG. . At this time, the retaining piece 205 formed on the side of the head chassis 20 is attached to the drive lever 50.
The bent engagement piece 522 of the head return lever 52 attached to the
It is located near the bottom of Figure 1.

If you operate the pose operation member in this state,
The LSI determines that this pause operation member has been operated, and outputs a drive signal to the solenoid gland 55. Then, as described above, the gear 49 is in the position shown in FIG. 13.

At this time, both the drive lever 50 and the head return lever 52 are at the most rotated position in the clockwise direction in FIG. Then, the head chassis 20 is pushed down slightly against the biasing force of the spring 27 in FIG. Therefore, the erasing head 22 and the recording/reproducing head 23 are lowered to a position where they lightly touch the tape, and the pinch roller 2
8 is completely separated from capstan 3. At this time,
At the same time, the rotation of the motor 16 is stopped because the leaf switch 51 is turned on by the other end of the drive lever 50 and the LSI determines that the pause operation member has been operated. Then, the pinch roller 28 separates from the capstan 3, the constant speed tape running is stopped, and a pause state is realized.

Here, the pause operation member has a so-called dual-operable touch switch structure in which it turns off when touched once, remains on even if the hand is removed, and turns off when touched again. Then, when the pause operation member is operated again in the above-described pause state, a drive signal is outputted from the LSI to the solenoid silant X. Then, as mentioned above, the gear 49 is returned to the position shown in FIG. 10, and the head return lever 52 is also returned to its original position, so that the head chassis 20
is again moved upward in FIG. 1, and tape playback is resumed.

Further, the pause state can also be realized by operating the tape constant speed running operating member after the pause operating member has been operated in advance. In this case, the head chassis 20 is first moved upward in FIG. 1 with the head return lever 52 in the position shown in FIG. It is a state.

Here, the operation when the fast forward or rewind operation member is operated in the tape playback state will be described. That is, let us assume that the fast forward operation member is operated in the tape playback state previously explained with reference to FIG. Then, as mentioned earlier, the 1-lenoid plan soya 55 is driven, and the gear 49 is moved to the 13th gear.
In the position shown in the figure, the head chassis 20 is slightly retracted by the head return lever 52, similar to the pose state. At this time, when the LSI determines that the leaf switch 51 is turned on by the other end of the drive lever 50 and that the fast-forward operation member is operated in the playback state, the motor 16 is activated. is controlled so that the rotation speed and rotation direction correspond to the fast forward state, and the tape is run in fast forward mode. At this time, since the recording/reproducing head 23 is in light contact with the tape recorder, the cassette tape recorder ends up in the fast forward playback (key) state.

In addition, when the rewind operation member is operated in the tape playback state instead of the fast forward multi-operation member, the operation is similar to that described above, and the motor 16 is controlled to have the rotation speed and rotation direction corresponding to the rewind state. Eventually, the cassette tape recorder enters the rewind playback (review) state.

In the cue or review state as described above, for example, if the solenoid plant gear 55 is driven by a detection signal from a non-recorded part detection circuit (not shown), the pause state is canceled and the tape runs at a constant speed. In the same manner as in the operation to return to the playback state, the cassette tape recorder returns to the playback state, and automatic cueing is realized here. In addition, in the state shown in FIG. 13, the solenoid planshaft 55 is driven by an external operation, or the locking member 54 is rotated clockwise in the figure to lock the locking portion 54 into the locking portion of the cam portion 496. By separately providing an electrical or mechanical operator (not shown) that can be separated from the 495, it is possible to perform so-called manual music selection by switching to the tape playback state at any position in the cue or review state.

In a cassette tape recorder having the basic configuration as described above, one embodiment of the present invention will be described below with reference to the drawings.

In FIG. 14, the same parts as in FIG. 5 are indicated by the same symbols, and only the different parts b will be explained here. That is, in FIG. 14, instead of the gear 43 shown in FIG. 5, a gear 58 is rotatably supported.

This gear 58 has a notch 58 that does not mesh with the gear 40.
1°582 is formed in place. Further, on one side of the gear 58 facing the main chassis 11, a cam portion 584 is formed, which has a flat portion 583 in a portion and a curved portion in the shape shown in the figure. Then, the cam portion 5
84 and the bent engagement piece 253 of the helad slider 25, one end of the JZ-44 is interposed to be driven as described above.

On the other hand, a substantially ring-shaped guide groove 585 is formed on the other surface of the gear 58. Two locking portions 586.5g7 are formed at predetermined positions on the inner peripheral wall of this guide groove 585, and two step portions 5B8, 589 are formed on the outer peripheral wall at positions substantially opposite to the locking portions 586.587. It's tangible.

- Furthermore, a branch wall 59 is formed at a predetermined position between the inner circumferential wall and the outer circumferential wall of the guide groove 585.

The lock portion 461 of the lock member 46 is loosely fitted into the guide groove 585 and is pressed against the inner circumferential wall by the biasing force of the torsion spring 467.

Here, the lock portion 461 of the lock member 46 is connected to the guide groove 5.
85, one end of the drive lever 44 is in contact with the flat part 583 of the cam part 584, so that the gear 58 is biased counterclockwise in the figure. However, the lock portions 4 and 61 are connected to the locking portion 58.
6, the gear 58 is prevented from rotating.

Further, on the rotation shaft 462 of the drive lever 46, a movable member 60 having an abbreviated shape is rotatably supported at its corner. This movable member 60 is moved clockwise in the figure by a spring 603 being engaged between a through hole 601 formed at one end thereof and a locking piece 602 formed on the main chassis IIK outsert. However, the clockwise rotation in the figure continues until the protrusion 604 formed at the other end of the movable member 60 comes into contact with a pin 605 formed as an outsert in the main chassis 1. It is said that Further, the main chassis 1 is attached to the other end of the movable member 60.
A bent retaining piece 606 is formed which passes through the through hole 52 formed in the head chassis 1 and protrudes toward the surface side of the main chassis 11, and faces the retaining piece 205 formed on the head chassis 20. Further, one side of the movable member 60 faces the pin 464 of the locking member 46.

The operation of the above configuration will be explained. First, it is assumed that the power switch is turned on from the stopped state shown in FIG. 14, and then the regeneration operation member is operated. Then, the solenoid plunger 48 is energized and its drive piece 48 is retracted, and the locking portion 461 of the locking member 46 is disengaged from the locking portion 586 of the gear 58 as described above. The gear 58 is rotated counterclockwise in the figure by the biasing force applied via the drive lever 44, and meshes with the gear 4θ.

Then, as shown in FIG. 15, the gear 58 is rotated counterclockwise in the figure. At this time, solenoid plant 4
8 is energized for the time required for the locking portion 46 to disengage from the locking portion 586, so that the locking portion 46 is energized by the biasing force of the torsion spring 467 applied to the locking member 46 after disengagement. It is immediately pressed against the inner peripheral wall of the guide groove 585. Therefore, since the lock portion 461 is interposed between the inner peripheral wall of the guide groove 585 and the branch wall 59,
The locking member 46 is rotated counterclockwise in the figure against the biasing force of the torsion spring 467. Then, the movable member 6θ is pushed by the pin 464 of the locking member 46 and rotated counterclockwise in the figure against the biasing force of the spring 603, and the bent engagement piece 606 is engaged with the helad chassis 2θ. It is moved to a position where it does not face the piece 205.

At this time, the drive lever 44 is rotated clockwise in the figure by the curved portion of the cam portion 584 against the biasing force of the spring 404, and as a result, the head slider 25 and the head chassis are rotated as described above. 20 is slid upward in the figure.

Then, the rotation of the gear 58 progresses, and as shown in FIG. 16, the head chassis 20
is moved to a position corresponding to the constant speed tape running condition, and constant speed tape running is performed at this position. At this time, gear 58
A biasing force is applied to rotate the gear 58 counterclockwise in the figure via the drive lever 44, but the lock portion 46
The gear 58 is locked by the locking part 582.
rotation is prevented. Further, the lock portion 461 of the lock member 46 is returned to its original position by the outer circumferential wall of the guide groove 585, but the movable member 60
The bent engagement piece 606 engages with the retaining piece 205 of the helad chassis 20, and is held in the rotated position counterclockwise in the figure.

Here, in the explanation from FIG. 5 to FIG. 13, it was explained that the cassette tape recorder is put into the cue or review state by operating the playback operation member and the fast forward or rewind operation member. The mechanism shown in FIG. 1.4 will be described assuming that, for example, a cue operating member and a repeat operating member (both of which have a touch switch structure), which are not shown, are provided separately. That is, let us assume that from the state shown in FIG. 14, the cassette cheap recorder is placed in the cue state and the cue operating member is operated. Then,
The solenoid sealant 48 is electrically driven, and the locking portion 461 of the locking member 46 is disengaged from the locking portion 586 of the gear 58 . Here, the energization time to the solenoid plant gear 48 when the cue operating member is operated is simply to disengage the locking portion 461 from the locking portion 586 like when the tape constant speed running operating member is operated. As shown in FIG.
1 is released from the locking portion 586, the gear 58 starts rotating, and the locking portion 461 is interposed between the outer circumferential wall of the guide groove 585 and the branch wall 59. When the lock portion 46 is interposed between the outer peripheral wall of the guide groove 585 and the branch wall 59, the lock member 46 is rotated in the direction of the hour hand in the figure, so that the movable member 60 is 60
4 is in contact with the pin 605, that is, the bent engagement piece 60
6 remains in the position facing the retaining piece 205 of the helad chassis 20. .

At this time, as described above, the drive lever 44 is rotated clockwise in the figure by the curved portion of the cam portion 584, so that the head chassis 20 is moved forward via the head slider 25.

Then, as the gear 58 continues to rotate, and as shown in FIG.
is sufficiently slid upward in the figure, and the head chassis 20 is advanced to a position where its retaining piece 205 comes into contact with the bending engagement piece 606 of the movable member 60.

In this position, the erasing head 22 and the recording/reproducing head 23 are in light contact with the tape, and the pinch roller 28 is not pressed against the capstan 31 through the tape), and the motor 16 is controlled to speed up the tape. By running the tape, the cassette tape recorder is placed in a queue state.

Furthermore, the same explanation as above can be made when the review operation member is operated, and in this case, the tape is rewound and is brought into the review state.

Therefore, according to the configuration shown in FIG. 14, the locking portion 4
I was busy controlling the position of the movable member 60 by guiding the head 6, and regulating the head chassis 2o to a position corresponding to the tape constant speed running state and the cue and kneeling state.
The tape constant speed running, cue, and review status can be controlled by the gears 58, and the configuration can be extremely simplified. Furthermore, when the pause operation member (not shown) is operated in the tape constant speed running state shown in FIG. Groove 585
By setting the time until the motor 16 is interposed between the outer circumferential wall and the branch wall 59, the intermediate stop state can be skipped and the state shown in FIG. 18 can be achieved. If so, will it have the same configuration? - It is possible to realize a closed state.

Furthermore, although the cue and review operation members are provided separately in the above example, it is possible to detect that both the playback operation member and the fast forward and rewind operation members are operated, and to control the solenoid silencer 48. The circuit unit may be configured so as to limit the energization time to the time required to enter the queue and review states.

Note that this invention is not limited to the above-mentioned embodiments, and can be implemented with various modifications without departing from the scope of the invention. Therefore, as described in detail above, according to this invention, 1. It is possible to provide an extremely good tape recorder switching mechanism that has a simple configuration, consumes little power, and is particularly suitable for small portable tape recorders.

[Brief explanation of the drawing]

1 and 2 are front and back views showing the overall configuration of a cassette tape recorder to which the present invention is applied, and FIG. 3 is a perspective view showing a mechanism for making the cassette tape recorder run at a constant tape speed. FIG. 4 is a perspective view showing a mechanism for putting the cassette tape recorder into a high-speed tape running state.
5 to 9 are explanatory diagrams of the operation of the mechanism shown in FIG. 3, FIGS. 10 to 13 are explanatory diagrams of the operation of the mechanism shown in FIG. 4, and FIG. 14 is a tape recorder according to the present invention. FIGS. 15 to 18 are diagrams illustrating the operation of this embodiment, respectively. 11... Main chassis 1, 12, 1.9... Reel stand, 14@J5... Gear, 16... Motor, 17
...Gear, 18...Friction member, 19...Gear, 2
0...Head chassis, 2...Head mounting body, 2
2... Erasing head, 23... Recording/playback head, 24
...Plate spring, 25...Head slider, 26.27
...Spring, 28...Pinch roller, 29...
・Pinch lever, 30...Torsion spring, 3
1... Capstan, 32... Flywheel, 3
3... Eject member, 34... Spring, 35
... Erroneous erasure prevention switch, 36... Cassette detection switch, 37... Braking member, 38... Torsion spring, 391.392... Brake element, 40... Gear, 41... Motor , 42...belt, 43...
Gear, 44... Drive lever, 454... Leaf switch, 46... Lock member, 47... Lock release lever, 48... Solenoid noran soya, 49... Gear, 50... Drive Lever, 5... Leaf switch, 52... Head return lever, 53... Brake release lever, 54... Lock member, 55... Solenoid 9 plunger, 58... Gear, 59...・Branch wall,
60...Movable member.

Claims (1)

[Scope of Claims] A first rotating body that rotates independently of tape running, and a non-engaged body that is engaged with the first rotating body so as to transmit rotational force and is not engaged with the first rotating body. a second rotating body having a portion formed at a predetermined position; a guide portion formed on the second rotating body; a locking member having a locking portion guided by the guide portion; first and second locking portions that are formed in such a manner that the non-engaging portion of the second rotary body faces the first rotary body when the lock portion is engaged; a branching part formed on the rotary body and dividing the guide path into a plurality of parts in the radial direction; and a branching part that disengages the locking part from the first and second locking parts in response to an external drive signal. an electromechanical transducer that drives an actuating member that cooperates with the plurality of guideways so as to selectively control the tracks on one side and the other side of the plurality of guide paths; a control member that is controlled to first and second positions in response to selectively taking trajectories on one side and the other side of the guide path, the control member being in the first and second positions;
and a switching mechanism for a tape recorder, characterized in that the tape recorder is set to different modes depending on the second position.