KR840001796Y1 - Automatic music selecting device for tape recorder - Google Patents

Abstract

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Description

Automatic selection device of tape recorder

1 is a schematic configuration diagram of a tape recorder to which the automatic selection apparatus according to the present invention is applied.

2 is an operation explanatory diagram showing the stop state of the shake section.

3 is an operation explanatory diagram of a play state.

4 is an explanatory diagram of the operation of the curved state.

The present invention relates to an improvement in the automatic selection or automatic ejection apparatus of a tape recorder, in particular a cassette tape recorder.

The conventional automatic selection or automatic exposing apparatus of this kind of cassette tape recorder uses a head dedicated for detection and a head used for recording and playback as a means of detecting a recording position of a tape. In the case of using, there was a drawback in that the cost was increased.

On the other hand, in the case of using the recording / reproducing head, the selection structure of the cassette tape recorder is changed from play to selection, and the head base equipped with the recording / reproducing head retreats by about 1 mm to 1.5 mm. The recording position is detected by the head which is still in contact with the tape, and at the same time, it relieves the tape's constant speed drive mechanism, rail drive mechanism, brake mechanism, etc. in conjunction with the retraction of the head base. It is configured to fast forward or rewind the tape by operating.

However, in the conventional structure, since it is difficult to directly control the mechanism by the retraction amount of about 1 mm to 1.5 mm of the head base, the same drive as the plunger is used separately from the play plunger whether the head base is moved to the play state A large plunger with torque was used to control the mechanism.

Therefore, there is a drawback that the cost increases due to the complicated structure and power consumption. Therefore, in recent years, the cassette tape recorder of the electric operation employs a power assist mechanism that does not use a large play plunger as in the conventional example. This uses a power-saving compact plunger to create a play state with a small drive torque, which coaxializes a reduction gear with a flywheel to which it is rotated by energizing the small plunger. When it engages with the drive gear fixed to the gear, it rotates and decelerates to obtain a large drive torque.The cam fixed to the gear shaft coaxially moves the head base equipped with the recording / playback head to the play position to stop the energization of the small plunger. The restoring is such that the headbase is retracted to the stop position. However, in the above configuration, since the head base is driven by using the driving gear, only two types of operation are available, either from the play state to the stop state or from the stop state to the play state. It was not possible to stop the headbase in a curved state between states. Therefore, the present invention improves the tape recorder employing the power assist mechanism, and selects the headbase by the selection position stop mechanism by using the gear reduction gear when the reduction gear is not engaged by the engagement portion at the time of returning to the stop in play. The present invention provides an automatic selection apparatus for a tape recorder which stops to a position and allows the recording and playback head to come into contact with the tape, release the brake mechanism, and other mechanisms, and at the same time allow the tape to be forwarded and rewound.

Next, the present invention will be described based on the embodiments of the drawings.

1 is a schematic configuration diagram of a tape recorder to which the automatic selection device according to the present invention is applied, and FIG. 2 is a diagram illustrating the operation of the fluctuation part, and (1) in the drawing is a reel *** (2). (3) is a motor, (4) is a motor pulley fixed to the rotating shaft of this motor (3), and (5) is an intermediate idler (1) which is in constant contact with the winding section (1). (6) and (6) are drive pulleys, and the pulley (6) is coaxially fixed with a small pulley (7), and between the drive pulley (6) and the motor pulley (4) by walking the belt (8) The rotational force of 3) is transmitted to the drive pulley 6. The drive pulley 6 is rotatably attached to the free end of the arm 10 pivoting the shaft 9 to the point, and the fast-forwarding plunger 11 connected to the arm 10 and the rewinding plunger. (12) alternately makes contact with the intermediate idler (5) and the supply rail (2). In addition, the above-mentioned intermediate idler 5, drive pulley 6, fast-feeding plunger 11, and rewind-rewinding plunger 12 allow the tape 13 to be quickly sent and rewinded. Consists of. (15) is a winding idler, this winding idler (15) is arranged as a disconnection material in both the winding zone (1) and the pulley (7), and the three driving mechanisms (1, 7, 15) 17).

(17) is a flywheel, the flywheel 17 is a rotational force of the motor (3) is transmitted by the belt 49 interposed with the motor pulley (4), but the idler as a driving method of the flywheel (17) The driving method and other driving methods may be used, and 18 is a capstan fixed to the flywheel 17.

(19) is a small diameter drive gear fixed coaxially with the flywheel (17), and (20) is a large diameter reduction gear, and the reduction gear (20) is arranged to rotate so as to engage with the drive gear (19). The one part is a toothless toothed part 20a. Moreover, the pin 21 is standing upright on the surface of the reduction gear 20, and the egg-shaped cam 22 is being fixed coaxially.

Reference numeral 23 denotes a rotation control mechanism of the reduction gear 20, which is composed of a stopper lever 24 and a power saving type compact plunger 25 for play. The stopper lever 24 is pivotally supported by the support shaft 26 at the center thereof, and the right side is bifurcated from the support shaft 26 so that two stopper arms 28 and 29 are installed. A stopper 28a is formed at the tip of the stopper arm 28.

In addition, the left end of the stopper lever 24 is connected to the plunger 25 for play, and 30 is a spring 31a and 31b for biasing the stopper lever 24 in the clockwise direction, respectively. 24) stopper pins.

32 is a head base, and the head base 32 is configured to move in parallel in the front-rear direction by the guide groove 33 and the pin 34, and 35 is used to bias the head base 32 back and forth at all times. Spring. On the head base 32, a recording / reproducing head 36 (which is also used for recording in this embodiment), an erasing head 37, and a pinch roller 38 are mounted, and 39 is a pinch roller 38. This arm 39 is provided with a resilient force for pivoting the pinch roller 38 in all directions with the shaft 40 as a point by a spring (not shown). Is the stopper pin of the arm 39. In addition, the pinch roller 38 and the capstan 18 constitute a constant speed drive mechanism 42 of the tape 13. The coaxial cam 22 of the reduction gear 20 is in contact with the trailing edge 32a of the head base 32.

Thus, the relationship between the reduction gear 20, the cam 22, and the rotation control mechanism described here will be described.

First, in the stop state, as shown in FIG. 2, the stop lever 24 is stopped by the stopper pin 31b by the elastic force of the spring 30, and the stopper 28a of one stopper arm 28 is Coupling with the pin 21 prevents the reduction gear 20 from rotating in the clockwise direction. At this time, the reduction gear 20 has its engagement portion 20a facing the drive gear 19 and the cam 22 has a horizontal axis (X). The rear edge 32a of the head base 32 is pressed against the elasticity of the spring 35 at the inclined position. Moreover, the elastic force of the spring 30 is set stronger than the elastic force of the spring 35.

In the play state, as shown in FIG. 3, the stopper lever 24 is stopped by the stopper pin 31a and the pin 21 is stopped by the other stopper arm 29 by the operation of the play plunger 35. As shown in FIG. ), The gearing section 20a is opposed to the drive gear 19 in the reduction gear 20. Thus, in this state, the cam 22 stops the head base 32 at the play position in a state inclined slightly to the right side of the vertical axis Y. In any case of stop and play, the cam 22 needs to be inclined in the right direction between the horizontal axis X and the vertical axis Y as described above. To give a rotational force.

Reference numeral 43 is a selection position stop mechanism of the head base 32, the stop mechanism 43 is connected to the stopper lever 45 and the first stage of the lever 45, which rotates with the shaft 44 as a point. When the stopper lever 45 is stopped by the stopper pin 48, the lever is composed of a spring 47 plunging the stopper lever 45 and the stopper lever 45 in a constant clockwise direction. When the trailing edge 32a of the head base 32 is in contact with the free end 45a of the 45, the base 32 is set to be in a selection position.

Next, the operation of the present invention will be described.

First, when switching from the stop state of FIG. 2 to the play state of FIG. 3, the play plunger 25 is operated so that the stopper lever 24 supports the elasticity of the spring 30 with the shaft 26 as the point and the half-scope The stopper 28a of the stopper arm 28 is disengaged from the pin 21 and stops while being rotated in contact with the stopper pin 31a, and the reduction gear becomes a rotating material. On the other hand, the cam 22 coaxial with the reduction gear 20 is pushed by the head base 32 which is retracted by the elastic force of the spring 35, Rotate clockwise by degrees. By the rotation of the cam 22, the inlet part of the reduction gear 20 meshes with the flywheel 17 and the coaxial drive gear 19 so that the reduction gear 20 rotates almost one clockwise direction. In this case, the cam 22 advances the head base 32 against the elasticity of the spring 35 while contacting the trailing edge 32a of the head base 32. Thus, when the tip of the cam 22 reaches a position slightly righter than the vertical axis Y, the cam 22 is pushed downward by the elastic force of the spring 35 so that the inlet portion of the reduction gear 20 is driven by the drive gear 19. At the same time, the engagement portion 20a is opposed to the drive gear 19 while the pin 21 is in contact with the tip of the stopper arm 29, and the rotation of the reduction gear 20 is prevented. In this way, the head base 32 stops at the stop position; The recording / reproducing head 36 and the erasing head 37 are in contact with the tape 13, and the pinch roller 38 is in contact with the capstan 18 to drive the tape 13 at constant speed, and to wind the winding idler 15. The tape 13 is wound by contacting the winding strip 1 and the sopley at a predetermined angle.

Next, with reference to Fig. 4, the operation of the selection state will be described.

When switching to the selection state, the play plunge 25 is operated to enter the play state as described above, and then the rotation control mechanism 23 is released and the state is shifted to the stop state, and the selection position stop mechanism 43 is operated therebetween. To stop the head base 32 at the selected position.

That is, the stopper lever 24 rotates clockwise by the elastic force of the spring 33 because the play plunger 25 of the rotation control mechanism 23 is inoperative immediately after the play state as described above. At the same time as the pin 31b is stopped, the gear reducer 20 is rotated while being separated from the tip of the stopper arm 29 of the pin 21. Therefore, the cam 22 in the stop position is pushed by the head base 32, which is retracted by the elastic force of the spring 35, and the pin 21 is stopped by the rotation of the cam 22, which rotates clockwise. It moves toward the stopper 28a of (28). On the other hand, at the same time as the energization stop of the play plunger 25, the selection plunger 46 of the selection position stop region 43 is operated to oppose the elasticity of the spring 47 to stop the stopper lever 45 to the stopper pin 48. Rotate until it stops by

Thus, the head base 32 that retreats toward the stop position stops at the selected position by the trailing edge 32a contacting the free end 45a of the stopper lever 45. Thus, the reproducing head 36 is still in contact with the tape 13, and the pinch roller 38 is disengaged from the capstan 18 from the play position to the selection position as a retreat of about 1 mm to 1.5 mm. At this time, the rail driving mechanism 16, the brake mechanism, and the like are released.

Subsequently, the fast forwarding and rewinding mechanism 14 is operated by the fast forwarding plunger 11 and the rewinding plunger 12 to quickly send and rewind the tape 13 to record the signal recorded on the tape 13. The recording and reproducing head 36 detects the electric current of the plunger 46 for selection by the signal, and the stopper lever 45 rotates in the counterclockwise direction by the elasticity of the spring 47 so that its free end ( Since the head 45 moves away from the head base 32, the head base 32 is retracted by the spring 35 to the stop position, and the tape 13 stops at the non-signal position of the grain stem.

Thus, the play plunger 25 is energized again to enter the play state described above, and the tape 13 starts to play.

According to the present invention, the drive gear 19 fixed to the flywheel 17 and the coaxial shaft as described above and the head for the recording and playback which can detect the recording signal of the tape 13 coaxially with the drive gear 19 ( To control the rotation of the reduction gear 20 and the reduction gear 20 which has the engaging part 21 which connected the cam base 22 which moves the head base 32 equipped with 36 to a stop state and a play state. In the tape recorder of the power auxiliary mechanism composed of the rotation control mechanism 23, the selection position stop mechanism 43 composed of the selection plunger 46 and the stopper lever 45 connected to the plunger 46 is provided. The stopper lever 45 stops the head base 32 at a selected position. Therefore, the tape recorder 13 of the power assist mechanism enables automatic selection of the tape, while the selection plunger 46 has only a driving torque for stopping the head base 32. You can use less.

Claims (1)

A drive gear 19 fixed coaxially with the flywheel 17, and a recording / reproducing head 36 capable of detecting a recording signal of the tape 13 coaxially with the drive gear 19, are provided. Rotation of the reduction gear 20 and the reduction gear 20 which has the engagement part 20a which connected the cam 22 which moves the head base 32 to a stop state and a play state. In a tape recorder employing a power assist mechanism composed of a rotation control mechanism 23 for controlling the pressure, the selection position comprising a selection music plunger 46 and a stopper lever 45 connected to the selection music plunger 46. An automatic selection apparatus for tape recorders provided with a stop mechanism (43) and a stopper lever (45) to stop the head base (32) at a selection position.