KR910002666Y1 - Mode changing apparatus of auto reverse tape player - Google Patents

Abstract

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Description

Mode changer of autoreversing tape player

1 to 8 show an embodiment of the present invention, and FIG. 1 is a plan view showing a mode switching device of an autoreverse tape player on the rear side of the chassis.

2 is a plan view showing the power transmission unit disposed on the rear surface of the chassis through the chassis in the tape player of FIG.

3 is a plan view showing the locked state of the switching gear in the play mode.

4 is a plan view showing the locked state of the switching gear in the cue mode or the review mode.

FIG. 5 is a diagram showing the mode switching mechanism arranged on the rear surface of the chassis for each of the operations in the tape player shown in FIG. 1. FIG. 5 is a stop mode.

6 is a normal play mode.

7 is the reverse play mode.

FIG. 8 is a diagram showing a cue mode or a review mode shifted from the reverse play mode. FIG.

9 is a plan view showing a mode switching device of a conventional autobus-type tape player.

10 is a plan view of the switching gear.

* Explanation of symbols for main parts of the drawings

1: Chassis 2a, 2b: Rails

3a, 3b: Rele gear 4a, 4b: Capstan

8, 9 flywheel 11: rail drive gear

13: children arm 15: children gear

20: switching gear 23a, 23b, 23c: stopper protrusion

30: trigger lever 34: lock pin

40: head base 41: magnetic head

42a, 42b: Pinch roller 50: Reverse gear

52: reverse arm 54: reverse regulator pin

55: Spring applying force to the reverse gear 60: Mode switching lever

70: regulating lever

71: Regulatory Regulations on the Movement of Reverse Gears

72: Regulatory Division that Regulates Children's Gears

M: motor

The present invention relates to an orbiterous tape player capable of playing a recording or reproducing with respect to the running of the tape in two directions, and in particular, by one motor and a switching member, by moving the tape in two directions. It is related with the mode switching device which enabled play.

9 shows a mode switching device of a conventional autoreversible tape player by a plan view. This conventional art is disclosed in the specification and drawings of the real element 60-79813, which is a prior application of the applicant of the present application.

The tape player switching mechanism is characterized by having a switching gear 11 as shown in FIG. A tooth 112 is formed around the switching gear 11, and two missing teeth 113a and 113b are provided. Moreover, the cam 115 for head base drive and the cam 114 for brake drive are provided in the surface.

The power of the motor is transmitted to a pair of left and right flywheels 116a and 116b, and the capstan 117a integrated with the flywheel 116a is always driven in a counterclockwise direction, and is integral with the flywheel 116b. The capstan 117b is always driven clockwise. On the right side, the driving gear 118 (always rotating in the counterclockwise direction) integrated with the capstan 117a drives the switching gear 111 to switch the respective modes. The switching timing of this mode is performed by the solenoid 119. That is, when the solenoid 119 is excited in response to an operation signal, the trigger lever 121 installed on the rear surface of the chassis 10 rotates, and the lock pin 122 installed at the bottom thereof rotates the switching gear 111. At this time, the cam 115 moves the head base 125, the left and right pinch rollers 126a, 126b and the magnetic head 127 are moved to a predetermined mode position, so that each operation mode is set. In addition, the brake lever 128 is raised by the cam 16, so that the brakes on the left and right rail gears 132a and 132b are released, and the left and right rails 131a and 131b are set to be driven.

In the operation of this type of auto-reversing tape player, the normal play mode in which the tape is driven to the right as shown in the drawing and the recording or playback by the magnetic head 127 is performed. In the reverse play mode for recording or reproducing by the magnetic head 127, the tape feeding mode for driving the tape to the highway in the right direction of the drawing, the tape rewinding mode for driving the tape in the reverse direction, and the like. There are each mode.

In the auto-reversing type tape player having the above structure, the switching of the forward and backward of the magnetic head 127 in the tape direction is controlled by the rotation of the switching gear 111, and similarly driven by the switching gear 111. The mode switching lever (not shown) and the head base 125 are moved so that any one of the pair of pinch rollers 126a and 126b contacts the capstans 117a and 117b. That is, in both the normal play mode and the reverse play mode, the capstan 117a and the drive gear 118 on the right side always rotate counterclockwise, and the capstan 117b on the left side always rotates clockwise. I'm making it. Then, the pair of pinch rollers 126a and pinch rollers 126b are selectively brought into contact with the capstan 117a or the capstan 117b to select the running direction of the tape, and the magnetic head 127 is moved forward and backward, thereby allowing both play. Switching modes.

However, in the autoreversible tape player, in addition to the driving of the capstans 117a and 117b, the driving and the power of each of the rails 131a and 131b must be simultaneously switched. That is, in the normal play mode, it is necessary to rotate the right rail region 131a in the counterclockwise direction, and in the reverse play mode, it is necessary to rotate the left rail region 131b in the clockwise direction. In addition, the transmission of power to the left rail 131b to be the tape supply side in the normal play mode should be cut off, and conversely, the power to the right rail band 131a should be cut off in the reverse play mode. Therefore, conventionally, as shown in FIG. 9, the real gears 132a and 132b are separately driven by providing idle gears 133 selectively engaged with both rail gears 132a and 132b. have.

However, in both the normal play mode and the reverse play mode, the capstans 117a and 117b and the drive gear 118 always need to rotate in the same direction. Motor must reverse the direction of rotation for each mode. As described above, the power transmission system for driving the capstans 117a and 117b and the power transmission system for driving the rails 131a and 131b are completely different in their basic power transmission operation.

Therefore, in the conventional autoreversus tape player, a motor for driving capstans 117a and 117b and a motor for driving rails 131a and 131b are provided separately, and the power transmission is also switched separately. What we are doing is the current state.

In the case of driving both dynamometers by one motor, a large number of solenoids are required for switching power to each system, and a switching mechanism driven by the solenoid is also very complicated.

Thus, in the conventional autoreversible tape player, it is necessary to install two motors or to install many solenoids, and it was considered impossible to reduce the number of motors and solenoids beyond this. Although weight reduction is being promoted, small weight reduction is considered to be the limit as long as the number of Passion solenoids of the motor cannot be made smaller than this.

The present invention solves the above-described conventional point of view, and by one motor and one kind of switching mechanism, both the switching of the position of the magnetic head and the pinch roller and the switching of the power transmission to the pair of rails It is possible to provide a mode switching device for an autoreversible tape player that enables operation, thereby minimizing the number of motors and the number of solenoids.

The mode switching device of the auto-reversing tape player according to the present invention is meshed with a pair of capstans 4a and 4b and a rail drive gear 11 and a rail drive gear 11 that are rotationally driven by a motor M. In addition, in accordance with the rotational direction of the rail drive gear 11, the oscillation operation is performed, and the children selectively engage with the pair of rail gears 3a and 3b provided on the pair of rails 2a and 2b. A gear 50 supported by the gear 15 so as to be able to move freely and in which a force is applied in a direction in which one of any one of the pair of electric gears 3a and 3b is engaged with the electric idler gear 15. And a side where the regulating portion 71 and the electric idle gear 15 do not engage with the gear 50 to restrict the electric gear 50 from moving in a direction where the electric gear 50 is engaged with both the one of the rear gear and the idle gear. To prevent the oscillation movement in the direction of the Is a control lever 70 having a control unit 72, and the control unit 71 is in the direction of the real gear of the gear 50 at the time of switching between the normal play mode and the reverse play mode. It has a switching member 40, 60 which moves the electric regulation lever 70 in the position which permits the movement of an electric gear, and the regulation part 72 restricts the oscillation motion of the idle gear 15. As shown in FIG.

In this autoreversible tape player, only one motor (M) is provided, and both the real drive gear 11 and the pair of capstans 4a and 4b in both the normal play mode and the reverse play mode. And are rotating in the same direction. When the normal play mode and the reverse play mode are switched, when the drive to the rails 2a and 2b is switched, in one mode, the idle drive gear 11 is moved from the real drive gear 11 by the water-repellent operation of the idle gear 15. Power is transmitted to one of the rail gears 3a, and when switching to another mode, the direction of rotation of the rail drive gear 11 is kept as it is, and the switching of the idle gear 15 is carried out at the same time. The dragon gear 50 is moved so as to be transmitted between the idle gear 15 and the other reel gear 3b so as to transmit power reversed to the reel gear 3b.

Hereinafter, an embodiment of the present invention will be described based on the drawings of FIGS. 1 to 8.

FIG. 1 is a plan view of an autoreversible tape player from the surface side of the chassis, FIG. 2 is a plan view showing the drive unit disposed on the rear surface of the chassis through the chassis, and FIG. 3 and FIG. 4 are operation gears provided at the drive unit. 5 to 8 are plan views showing the mode switching mechanisms disposed on the rear surface of the chassis for each operation through the chassis.

Although the member which comprises the drive part shown by FIG. 2 and the member which comprises the mode switching mechanism shown by FIG. 5 thru | or FIG. 8 are arrange | positioned at the back surface of the chassis 1, it is shown separately for convenience of description. .

As shown in FIG. 1, a pair of rails 2a and 2b are provided on the surface of the chassis 1. Each of the rails 2a and 2b is supported to rotate with the rail gears 3a and 3b. Moreover, a pair of capstans 4a and 4b are provided on the surface of the chassis 1 so as to be free to rotate, and a cassette half (not shown) can be mounted on such a member.

As shown in FIG. 2, in this autoreversible tape player, one motor M and one solenoid S serving as a driving source are provided on the rear surface of the chassis 1. With only one motor M and one solenoid S, setting of various modes and drive of the tape in each mode are performed.

As shown in FIG. 2, the drive pulley 5 is fixed to the motor M. As shown in FIG. Further, the rear surface of the chassis 1 is provided such that the driven pulley 6 and the flywheels 8 and 9 supported by the shaft 7 are arranged. The flywheel 8 is integrated with the electric capstan 4a, and the flywheel 9 is integrated with the capstan 4b. One rubber belt 10 is hung on the drive pulley 5, driven pulley 6, and each flywheel 8, 9, and is driven to rotate by the power of the motor M, respectively. The motor M rotates in both normal and reverse directions. The motor M rotates counterclockwise in the normal play mode, the reverse play mode, the tape feeding mode and the cue mode, and the rubber belt 10 is driven in the direction. In addition, the tape rewind mode and the review mode rotates clockwise only, the rubber belt 10 is driven in the direction.

As shown in FIG. 1, the rail drive gear 11 is supported by the shaft 7 so that rotation is free. That is, the driven pulley 6 and the real drive gear 11 are polymerized and are supported so as to be able to rotate independently about the hollow shaft 7. In addition, the friction member 12 is fitted between the driven pulley 6 and the rail driving gear 11 by felt or the like, and the driven pulley 6 and the rail driving gear 11 are pressed in contact with each other by a spring or the like. Force is to be exerted. By this pressing contact structure, the driven pulley 6 and the rail drive gear 11 are integrally rotated when the load is low, and are driven by the motor M when the load is applied to the rail drive gear 11. It is possible to slip between the driven pulley 6 and the rail drive gear 11.

As shown in FIG. 1, the idle arm 13 is supported on the shaft 7 supporting the driven pulley 6 and the rail drive gear 11 so that rotational movement is free, and this idle gear 13 The idle gear 15 is supported by the pin 14 at the tip end. The idle gear 5 is always meshed with the electric rail drive gear 11. The idler arm 13 and the idler gear 15 constitute a receiving mechanism. When the real drive gear 11 is driven in the counterclockwise direction by the motor M, the idle arms 13 are driven in the counterclockwise direction together, and the idle gear 15 is meshed with the real gear 3a on the right side. . On the right side, the reel gear 3a and the reel stage 2a are driven counterclockwise. On the contrary, when the rail driving gear 11 rotates clockwise, the idle gear 15 of the left gear 3b and the rail stand 2b are driven clockwise.

As shown in Figs. 2 to 4, a switching gear 20 is provided on the rear surface of the chassis 1. This switching gear 20 is for switching various modes by the rotation operation.

The switching gear 20 is supported by the shaft 21 so that rotational movement is free with respect to the chassis 1. On the right side, the drive gear 16 is fixed to the capstan 4a, and the teeth around the switching gear 20 oppose the position where the drive gear 16 engages. Two teeth (X, Y) are provided around the switching gear (20). When the defect (Y) faces the drive gear (16), the power of the drive gear (16) is reduced. It is not transmitted to the switching gear 20, the drive gear 16 is meshed with the teeth around the switching gear 20 at the time when the missing portion (X) and the missing portion (Y) is removed from the drive gear 16, the motor The power of (M) is transmitted to the switching gear 20 via the drive gear 16.

The back side of the drive gear 16 The main wall surface 22 has a triangular stopper 23a, 23b that protrudes in the center direction.

Another stopper protrusion 23a is formed at a position slightly separated from the stopper protrusion 23b in the center direction. On the other hand, the trigger lever 30 is provided on the rear surface of the chassis 1. The trigger lever 30 is supported by the pin 31 so that rotational movement is free. The upper connecting projection 32 of the trigger lever 30 is connected to the flanger of the solenoid S. In addition, the trigger lever 30 is exerted by the spring 33 in a counterclockwise direction, that is, in the plunger protruding direction of the solenoid S. FIG.

The lower end portion 30a of the trigger lever 30 extends to the rear surface of the switching gear 20, and the lock pin 34 is fixed to the lower end portion 30a. The lock pin 34 is in the recessed portion of the rear surface of the switching gear 20. When the lock pin 34 hangs on any of the stopper protrusions 23a, 23b, and 23c described above, rotation of the switching gear 20 in the clockwise direction is blocked.

The L-shaped head base drive cam 24 protrudes from the surface of the switching gear 20. This head base drive cam 24 is for driving the head base 40 mentioned later. Three guide cams 25a, 25b, and 25c are installed on the rear surface of the switching gear 20. Between a guide cam (25a) and between the guide cam (25b) has a guide passage Z _1, the guide cam (24b) and a cam (25c) has a guide passage Z _2. The mode switching lever 60, which will be described later, is positioned by the guide passages Z ₁ and Z ₂ .

As shown in FIG. 1, a head base 40 is provided on the surface of the chassis 1. The head base 40 is supported to slide freely in the vertical direction (a)-(b) direction of the figure.

The magnetic head 41 is supported on the head base 40. This magnetic head 41 has a structure that can cope with both modes of travel in the tape direction (left direction in the drawing). When the head base 40 moves in the (A) direction, the magnetic head 41 contacts the tape, and when the head base 40 moves in the (B) direction, the magnetic head 41 falls off the tape.

The head base 40 also controls the operation of the pair of pinch rollers 42a and 42b. The pair of pinch rollers 42a and 42b oppose the capstans 4a and 4b, respectively. On the right side, the pinch roller 42a is supported by the holder 43a, and the holder 43a is rotatably supported by the chassis 1 by the pin 44a. Moreover, the pinch roller 42b on the left side is supported by the holder 43b, and the holder 43b is supported by the pin 44b so that rotational movement may be freely performed. By a spring not shown, the right holder 43a is applied with a force in a clockwise direction, and the left holder 43b is applied with a counterclockwise force, with both pinch rollers 42a. The pinch roller 42b is pushed by the capstan 4a and the capstan 4b, respectively, and is pushed in the contacting direction. However, the left and right holders 43a and 43b are integrally provided with holder plates 45a and 45b, and these good holder pins 45a and 45b are installed at the lower left and right sides of the electric head base 40. It is caught by the regulation valve 40a, 40b. When the head base 40 is retracted in the (b) direction, the holder plates 45a and 45b are retracted by the regulating edges 40a and 40b so that the pinch rollers 42a and 42b are moved from the capstans 4a and 4b. Falls. Conversely, when the head base 40 moves in the (A) direction, the pinch rollers 42a and 42b advance in the direction of the capstans 4a and 4b by the force of the spring.

The head base 40 is exerted a force in the (B) direction by the force of the spring 46. In addition, the drive piece 40c is provided in the center of the head base 40.

This drive piece 40c is bent in the back direction of the three o'clock 1. The drive piece 40c is in contact with the head base drive cam 24 on the switching gear 20 by the force applied by the electric spring 46. Therefore, when the electric switching gear 20 rotates in the clockwise direction, the head base drive cam 24 presses the drive piece 40c to drive the head base 40 in the (a) direction.

The reverse gear 50 is provided in the window provided in the upper part of the head base 40. The reverse gear 50 is supported by the pin 51 at the tip of the reverse arm 52. The reverse arm 52 is arrange | positioned at the back surface of the chassis 1, and the rotational movement is supported freely with respect to the chassis 1 by the pin 53. As shown in FIG. And the reverse regulation pin 54 and the reverse gear 50 provided in the center of the reverse arm 52 protrude on the surface of the chassis 1. As shown in FIG. 5, the reverse arm 52 is clockwise by the spring 55, that is, the reverse gear 50 is always applied in the direction in which the reverse gear 50 meshes with the reel gear 3b. . In addition, the first regulator pin 40d is formed at the upper end of the head base 40. In the state of FIG. 1, since the head base 40 is moving in the (b) direction, the reverse limiting pin 54 intervenes the first restricting pin 40d by the first restricting pin 40d in the axial groove 40e. Rotational movement to the clockwise direction is regulated.

Moreover, as shown in FIG. 1, a pair of pressing pieces 40f and 40g are provided in the left and right of the center part of the head base 40. As shown in FIG. The corner pressing pieces 40f and 40g are bent in the inward direction of the ground and protrude to the rear surface side of the chassis 1.

As shown in FIG. 5 and FIG. 8, the mode switching lever 60 is provided on the rear surface of the chassis 1. In FIGS. 5-8, the head base 40 (installed on the surface of the chassis 1) is shown by one fold line for the purpose of operation description.

The mode switching lever 60 is supported so as to operate only in the left-right direction ((C)-(D) direction) with respect to the chassis 1, and a force is applied in the (D) direction by the spring 61. At the lower end of the mode switching lever 60, a driving piece 62 (shown in FIG. 5 only and omitted in FIGS. 6 to 8) is provided, which is bent upward. The driving pin 63 is fixed to the tip of the head. As shown in FIG. 2, the drive pin 63 is located in the back surface of the switching gear 20, and the drive pin 63 is connected to the left side of the lower end 30a of the trigger lever 30. As shown in FIG. . Electrical switch gear 20 is rotated movement, is held in the drive pin 63, the guide passage of the rear surface of the switching gear 20 (Z ₁₎ or the guide passage (Z ₁₎ (see FIG. 3), in which By this, the movement position of the mode switching lever 60 in the (C)-(D) direction is determined.

The mode switching lever 60 has pinch roller control windows 64a and 64b formed at the left and right positions at the bottom of the city. (See FIG. 5) The pinch roller control windows 64a and 64b are provided with a step at the top of the city. The part which protrudes below the city through this step | step becomes the control edge 65a, 65b. The holder pins 45a and 45b provided in the holders 43a and 43b of the electric pinch rollers 42a and 42b pass through the regulating edges 40a and 40b of the head base 40 so as to pass through the mode switching lever 60. ) Is inserted into the restriction windows 64a and 64b. That is, the position of the pinch rollers 42a and 42b is alternately regulated by the combination of the regulating edges 40a and 40b provided in the head base 40 and the regulating edges 65a and 65b provided in the mode switching lever 60. It is.

The regulation 70 is connected to the upper end of the mode switching lever 60. (See Fig. 5)

The pin 66 is fixed to the upper end of the mode switching lever 60, the pin 66 is inserted into the long hole 70a formed in the regulating lever 70, the regulating lever 70 is a mode switching lever ( 60) are connected to operate in (A)-(B) direction. In addition, the mode switching lever 60 and the regulating lever 70 are connected by a spring 73, and by the contracting force of the spring 73, the regulating lever 70 is exerted a force in the (b) direction. The regulating lever 70 is connected to enter the mode switching lever 60. The regulating lever 70 is integrally formed with a second regulating piece 71 formed in a protruding form in the downward direction and a third regulating piece 72 formed in a protruding form above the city.

The second regulation piece 71 is for regulating the reverse regulation pin 54 on the electric reverse arm 52, and the third regulation pin 72 regulates the pin 14 of the electric idle gear 15. It is to.

In addition, the pressing pieces 70a and 70b are provided in the lower left and right sides of the control lever 70. As shown in FIG. These pressing pieces 70a and 70b are bent in the forward direction of the sheet of Fig. 5. The pressing pieces 70a and 70b are brought into contact with the pressing pieces 40f and 40g of the electric head base 40 under certain conditions (in the state of FIG. 7).

Next, the operation of the autoreversible tape player having the above structure will be described for each mode.

Stop mode

1, 2 and 5 show the stop mode. At this time, the switching gear 20 stops when the stopper protrusion 23a hangs on the lock pin 34 (the solenoid S is not excited). At this time, the missing part X of the tooth of the switching gear 20 opposes the drive gear 16. Moreover, since the head base drive cam 24 on the switching gear 20 is in the position extended downward, the head base 40 does not receive the driving force by this head base drive cam 24, but the spring ( 46) to the (B) direction. Therefore, the magnetic head 41 on the head base 40 is kept away from the tape.

The holder 43a, 43b of the pin tie roller and the holder pins 45a, 45b of the pin tie roller are rolled down by the restricting pieces 40a, 40b of the head base 40, and the pinch rollers 42a, 42b are rolled down. ) Is retreating to the position away from the capstans 4a and 4b.

In addition, as shown in FIGS. 1 and 5, the reverse restricting pin 54 is formed by the groove 40e on the side of the first regulating piece 40d provided on the upper end of the head base 40. It is pressed down in the direction, the reverse arm 52 is rotated in the counterclockwise direction. Therefore, the reverse gear 50 is separated from the left gear 3b.

In Fig. 5, the mode switching lever 60 is moved in the (d) direction by the force of the spring 61.

Tape Feeding and Rewinding Modes

In the state of the stop mode shown in FIG. 1, FIG. 2, and FIG. 5, when the motor M is rotated counterclockwise, the rubber belt 10 will run in a direction. And the driven pulley 6 is driven counterclockwise.

At the same time, the flywheel 8 on the right side is driven counterclockwise, and the flywheel 9 on the left side is driven clockwise. When the driven pulley 6 is driven counterclockwise, the real driving gear 11 shown in FIG. 1 also rotates counterclockwise. By this rotation, the idle arm 13 oscillates in the counterclockwise direction, and the idle gear 15 is engaged with the real gear 3a on the right side. Therefore, the right rail 2a is driven counterclockwise, and the tape is fed.

On the contrary, when the motor M is rotated clockwise, the rubber belt 10 travels in the direction, and the driven pulley 6 and the real drive gear 11 are driven clockwise. By this rotation, the idle arm 13 oscillates in the counterclockwise direction, the idle gear 15 is engaged with the left gear 3b, and the left rail 2b is driven clockwise so that the tape Rewind

Switch to normal play mode

The normal play mode is an operation mode in which recording or reproducing is performed while the tape in contact with the magnetic head 41 is traveling in the right direction.

When switching to the normal play mode, in the stop mode shown in FIGS. 1, 2 and 5, the motor M is rotated counterclockwise and the rubber belt 10 is driven in the direction. , Excite the solenoid (S) for a short time. When the solenoid S is excited, the flanger is sucked, the trigger lever 30 is driven clockwise, and the lock pin 34 falls off the stopper protrusion 23a. At this time, the switching gear 20 is given a force applied in the clockwise direction by a brake lever (not shown) or the like. Therefore, when the lock pin 34 falls from the stopper protrusion 23a, the switching gear 20 is driven in a clockwise direction by the force applied by electricity, and the missing portion X is pulled out of the driving gear 16 and switched. The teeth of the gear 20 are meshed with the drive gear 16.

Since the drive gear 16 is driven counterclockwise by the motor M, after the missing part X is removed, the switching gear 20 is driven to rotate clockwise by the drive gear 16. . Since the solenoid S becomes non-excited immediately after the lock pin 34 is removed from the stopper protrusion 23a, the trigger lever 30 returns counterclockwise by the force of the spring 33. Therefore, the stopper protrusion 23b comes into contact with the lock pin 34 at the stage where the next defective portion Y of the switching gear 20 moves to the position opposite to the driving gear 1b, so that the switching gear 20 is It is locked again at this position.

(State of FIG. 3)

While the switching gear 20 rotates from the state of FIG. 2 to the state of FIG. 3, the head base drive cam 24 presses the drive piece 40c shown in FIG. The base 40 moves in the (a) direction. When the switching gear 20 is locked in the state of FIG. 3, the head base 40 moves to the largest direction in the (A) direction to stop.

On the other hand, during the rotational movement of the switching gear 20, the guide cam 25c provided on the rear surface of the switching gear 20 draws the driving pin 63 into the guide passage Z (see FIG. 3). The mode switching lever 60 stops in a state of slightly moving in the (c) direction than the stop mode in FIG.

6 shows this normal play mode.

By the movement of the head base 40 in the (a) direction, the magnetic head 41 is advanced to the position where the magnetic head 41 is in contact with the tape. Further, when the head base 40 is advanced, the holder pins 45c and 45b regulated by the regulating valves 40a and 40b are allowed to move forward, and the pinch rollers 42a and 42b are driven by the force of the spring. The capstans 4a and 4b move forward in the direction. However, as shown in FIG. 6, the left side 65b of the pair of regulating edges 65a and 65b provided in the mode switching lever 60 moves to the position where the holder pin 45b stops moving forward. Therefore, the pinch roller 42b on the left side does not contact the capstan 4b, and only the pinch roller 42a is pressed against the capstan 4a on the right side.

Moreover, the rear bus arm 52 which was regulated by the groove 40e of the head base 40 until the movement of the head base 40 to (a) direction is accompanied by the force of the spring 5 Driven clockwise. However, as shown in FIG. 6, since the reverse regulating pin 54 abuts the second regulating piece 71 provided on the regulating lever 70, further rotational movement of the reverse arm 52 is regulated. . Therefore, the reverse gear 50 is located at a position away from the left gear 3b and the idle gear 15.

As described above, in the normal play mode, since the driven pulley 6 and the real driving gear 11 are driven counterclockwise by the power of the motor M, the idle gear 15 is counterclockwise. Direction in the direction, is meshed with the right rail gear (3a), the right side is driven in the counterclockwise direction (2a). Therefore, it is wound by the rail stand 2a on the right side of the tape in the set harp to be mounted, and the tape is fitted into the pinch roller 42a which is pressed against and touches the capstan 4a on the right side and is fixed in the right direction shown in the drawing. It is sent out to the road. Thus, the recording or reproducing operation is performed by the magnetic head 41 in contact with the tape.

The rotation speed of the motor M in the normal play mode is the same as in the case of the feeding mode described above. Since the capstan 4a is sent out at a low speed in accordance with the conveying speed, the rotation speed per unit time of the rail stand 2a is more restricted than in the feeding mode. At this time, the difference between the rotational speed of the rail stand 2a and the rotational speed of the driven pulley 6 is absorbed by the slip between the rail drive gear 11 and the driven pulley 5 through the friction member 12.

Switching from normal play mode to cue mode or review mode

The cue mode is a state in which the tape is fed in the right direction, and the magnetic head 41 is lightly in contact with the tape. The review mode is the state in which the tape is rewound in the left direction and the magnetic head 41 is lightly in contact with the tape. Say. Selection of the first part of a song is performed by the EQ mode or the review mode.

When the solenoid S is excited in the normal play mode (state of FIG. 3), the lock pin 34 falls off the stopper protrusion 23b. In the normal play mode, since the return force to the (b) direction of the head base 40 by the spring 46 acts on the head base drive cam 24, the switching gear 20 continues to be clockwise. Is being added. Therefore, when the lock pin 34 falls from the stopper protrusion 23b, the switching gear 20 rotates in the clockwise direction by the applied force, and the switch pin 23c switches while the stopper protrusion 23c is in contact with the lock piece 34. The gear 20 is locked again (refer to FIG. 4). At this time, the missing portion Y of the switching gear 20 is a sieve facing the drive gear 16. In the cue mode or the review mode, the solenoid S is continuously excited and kept in the state of FIG.

When the switching gear 20 rotates slightly to the position of FIG. 4, the head base drive cam 24 also rotates slightly clockwise, so that the head base 40 is slightly retracted from the normal play mode position. In the normal play mode, the magnetic head 41 strongly contacts the tape and the tape is bent in the cassette half, so in the cue mode or the review mode, the magnetic head 41 retreats in the (B) direction and gently It becomes the position to contact. The pinch roller 42a on the right side is separated from the capstan 4a by the right restricting side 40a of the head base 40.

In addition, as in the normal play mode of FIG. 6, since the reverse restricting pin 54 is regulated by the second regulatory piece 71, the reverse gear 50 includes the left gear 3b and the idle gear ( 15), the oscillation operation of the idle gear 15 is not hindered by the reverse gear (50).

The cue mode is performed by rotating the motor M counterclockwise in the above state. Similarly to the feeding mode of the tape, the real gear 3a on the right side is driven counterclockwise by the oscillation of the idle gear 15.

Since the pinch roller 42a is separated from the capstan 4a, the force of the capstan 4a does not act on the tape, and the tape is rapidly wound by the rail 2a on the right side, and the magnet is in light contact with the tape. The head 41 selects the beginning of a piece of music, and the like. On the contrary, in the review mode, the motor M is reversed clockwise. The rail drive gear 11 is driven clockwise, and the left rail 2b is driven clockwise by the oscillation operation of the idle gear 15.

Switch from normal play mode or cue mode to review mode to stop mode

When switching to the stop mode in the normal play mode shown in FIG. 6, the process is switched to the stop mode after switching to the cue mode or the review mode.

In the cue mode or the review mode, the switching gear 20 is in FIG. 4.

When the energization of the solenoid S which has been continuously excited in the cue mode or the review mode is cut off, the trigger lever 30 returns to the counterclockwise direction by the spring 33. Therefore, the lock pin 34 comes off the stopper protrusion 23c. Since the changeover gear 20 is continuously pressed in the (B) direction by the head base 40, when the lock pin 34 is pulled out, the changeover gear 20 rotates clockwise so that the missing portion Y is driven. Fall out of gear 16. Thereafter, the switching gear 20 is engaged with the drive gear 16 which is continuously driven by the motor M, and rotates clockwise. The rotation of the switching gear 20 continues until the stopper protrusion 23a abuts against the lock pin 34. During this time, the head base 40 is retracted in the (B) direction by the force of the spring 6.

Then, when returning to the stop mode shown in FIGS. 1, 2 and 5, the switching gear 20 is locked again. As described above, the magnetic head 41 falls off the tape, and The pinch rollers 42a and 42b are retracted to a position far away from the capstans 4a and 4b.

In addition, during the transition to the stop mode, the reverse regulation pin 54 is pushed down by the lower slope of the first regulation piece 40d provided in the head base 40, and the reverse arm 52 is counterclockwise. Rotate in the direction.

After the transition to the stop mode, the reversus limiting pin 54 is held in the groove 40e as shown in FIG.

Switch from stop mode to reverse play mode

In the reverse play mode, the tape in contact with the magnetic head 41 is sent in the left direction in the drawing, i.e., the recording and the reproduction are performed while the normal play mode and the tape running direction are reversed.

The switching to the reverse play mode is basically the same as the switching in the normal play mode, but the position of the mode switching lever 60 is different from that in the normal play mode.

Switching to reverse play mode is performed by exciting the solenoid S in the stop modes shown in FIG. 1, FIG. 2, and FIG. When the solenoid S is excited and the lock pin 34 of the trigger lever 30 falls off the stopper protrusion 23a, the switching gear 20 is driven clockwise, and the switching gear shown in FIG. 20) The lock state is reached.

In the movement, the head base 40 is moved in the direction of (a) by the head base drive cam 24.

However, when switching from the stop mode to the reverse play mode, the solenoid S is excited longer than when switching to the normal play mode.

When the solenoid S is energized for a long time, the lower end portion 30a of the trigger lever 30 driven in the clockwise direction pushes the drive pin 63 provided on the drive piece 62 of the mode switching lever 60 in the left direction. Serve In this state, when the changeover gear 20 rotates clockwise, the tip of the guide cam 25a on the rear side of the changeover gear 20 is caught by the drive pin 63, and then the rotation of the changeover gear 20 is performed. The drive pin 63 is drawn into the guide passage Z ₁ (see FIG. 3), and is stopped with the mode switching lever 60 moved in the (C) direction.

When the mode switching lever 60 moves in the (C) direction, the regulating lever 70 also moves, so that the pressing pieces 70b and 70c of the regulating lever 70 move to the left side of the figure and the head base 40 moves. This push piece 40f, 40g comes to oppose.

When the switching gear 20 rotates to the state shown in FIG. 3 and the switching to the reverse play mode is completed, the head base 40 is moved by the head base driving cam 24 in the (A) direction. The pressing pieces 40f and 40g abut against the pressing pieces 70b and 70c, and the regulating lever 70 is lifted in the direction of (a) (state of FIG. 7). Movement in the a) direction is permitted by the extension of the spring 73 between the mode switching lever 60. In the state shown in FIG. 7, since the 2nd regulation piece 71 moves to the left side, and falls out from the reverse regulation pin 54, the reverse arm 52 is hard clockwise by the force of the spring 55. As shown in FIG. Rotational movement without being regulated, the reverse gear (50) is moved to the position where the left gear (3b) and the idle gear (15) is engaged with both. When the control lever 70 rises in the (A) direction, the third regulatory piece 72 abuts on the right side of the pin 14 supporting the idle gear 15, and the half of the idle gear 13 Regulate clockwise movement in clockwise direction.

In the reverse play mode, the rotation direction of the motor M is counterclockwise as in the normal play mode. Therefore, the rotational direction of the driven pulley 6 and the rail drive gear 11 is counterclockwise. As shown in FIG. 7, since the water dust in the counterclockwise direction of the idle gear 15 at this time is regulated by the 3rd regulation piece 72, the idle gear 15 is different from the real gear 3a of the right side. It is not engaged, the rotation of the idle gear 15 is transmitted to the left gear 3b through the reverse gear (50). As a result, the left gear 3b and the rail 2b are driven clockwise.

On the other hand, since the rotation of the motor M is counterclockwise, the left capstan 46 is driven at a constant speed in the clockwise direction together with the flywheel 9. In the reverse play mode, as shown in FIG. 7, the mode switching lever 6 moves in the direction of (C), so that the control edge 65a of the control window 64a on the right side has the right arc. It opposes the front of the wool pin 45a. Therefore, even if the head base 40 moves in the (A) direction, the rotational movement of the holder 43a of the pinch holder 42a on the right side is regulated by the restricting pin 65a. Therefore, only the pinch roller 42b on the left side is pressed against the capstan 4b, and the pinch roller 42a on the right side is separated from the capstan 4a.

Therefore, the tape is fitted to the capstan 4b and the pinch roller 42b on the left side and is sent at a constant speed in the left direction by the rotation of the capstan 4b.

At the same time, the left side is wound by the reel zone 2b. Then, recording or reproduction by the magnetic head 41 is performed on the tape traveling in the left direction.

Switch from reverse play mode to cue mode or review mode.

In reverse play mode, the switching gear 20 is locked in the state shown in FIG. When the solenoid S is energized and it is still energized as shown in FIG. 4, the switching gear 20 is locked in the state where the stopper protrusion 23c abuts against the lock pin 34, as shown in FIG. At this time, the head base 40 is slightly retracted in the (b) direction. Therefore, as shown in FIG. 8, the regulating lever 70 lifted by the head base 40 is returned to (b) direction by the force of the spring 73. FIG. Then, the third regulatory piece 72 of the control lever 70 is retracted to enable the oscillation operation of the idle gear 15. Further, the first regulating pin 40d of the head base 40 pushes the reverse regulating pin 54 in the (b) direction, and the reverse arm 52 is rotated in the counterclockwise direction, so that the reverse gear 50 ) Falls from the real gear 3b and retreats to the position which does not disturb the oscillation of the idle gear 15.

The magnetic head 41 is brought into light contact with the tape by retreating in the (b) direction of the head base 40. The pinch roller 42b is removed from the capstan 4b by the restriction pin 40b of the head base. Therefore, when the motor M is rotated counterclockwise, the rail driving gear 11 rotates counterclockwise, and the idle gear 15 oscillating in the same direction is engaged with the rail gear 3a on the right side. The right side rail 2a is driven to feed the tape, and the cue operation is performed. On the contrary, when the motor M is driven clockwise, the idle gear 15 is oscillated and engaged with the left rail 3b, the left rail 2b is driven, and the tape is rewound. A review operation is performed.

In the embodiment of the figure, the reverse gear 50 is interposed between the left gear 3b and the idle gear 15 when switching to reverse play mode. At the time of switching to the play mode, the same gear 50 is interposed between the right rear gear 3a and the idle gear 15, and at this time, the idle gear 15 in the clockwise direction is regulated. You may also do it. In this case, however, it is necessary to always rotate the reel gear 11 in the clockwise direction as opposed to the embodiment of the figure.

According to the present invention as described above, for example, when switching to the reverse play mode, the reverse gear is inclined between the one of the real gear and the idle gear, and the idle gear and the other gear are the other gear. Since it prevents the idle gears from going in the direction of the other rear gear, the real driving gear is always kept in the same direction in both normal play and reverse play modes. Rotate Therefore, it is possible to drive a pair of capstan and a real driving gear in the same direction by one motor, and the same motor can be used for the capstan's drive system and the rail's drive system. Therefore, it is not necessary to install two motors as in the prior art. In addition, since the mode switching lever and the head base for regulating the pinch roller can be used as the switching portion for driving the reverse, etc., the structure of the switching member is also not complicated compared with the prior art. In addition, the configuration of the mode switching lever and the head base can be realized by one switching gear and one solenoid.

Therefore, according to the present invention, it is also possible to configure an autoreversible tape player with one motor and one solenoid, and it is possible to miniaturize and reduce power consumption.

Claims (2)

It is engaged with the pair of capstans 4a and 4b and the real driving gear 11 and the real driving gear 11 driven by the motor M, and performs a water-repellent operation in accordance with the rotation direction of the real driving gear 11. In addition, the idle gear 15 selectively engaged with the pair of rail gears 3a and 3b installed in the pair of rail zones 2a and 2b is supported so as to move freely, and the pair of rail gears 3a and 3b are electric. Of the gear 50 to which the force is applied to both the one of the one and the electric idler gear 15, and the electric gear 50 to the one of the one of the reel gear and the idler gear. A regulation unit 71 for restricting movement and a regulation unit 72 for preventing the electric idle gear 15 from performing the oscillation operation in the direction of the reel gear on the side not engaged with the gear 50. Lever 70, either normal play mode or reverse play mode At the time of switching in the application mode, the electric regulator lever 70 is moved to a position where the gear 50 is allowed to move in the direction of the reel gear and the restricting portion 72 restricts the oscillation operation of the idle gear 15. A mode switching device for an auto-reversing tape player, which is provided with moving parts (40, 60) installed therein. The switching member for moving the control lever 70 includes a mode switching lever 60 for restricting the movement of one of the pair of pinch rollers 42a and 42b in the direction of the capstans 4a and 4b in accordance with the mode switching. Utility model registration claim consisting of a head base (40) for bringing the magnetic head (41) close to and away from the tape. The mode switching device for the player of the autoreversible tape according to claim 1.