JPH0677360B2 - Tape recorder - Google Patents

Description

TECHNICAL FIELD The present invention relates to a tape recorder.

2. Description of the Related Art In recent years, tape recorders have become more multifunctional, but on the contrary, demands for cost reduction have been increasing. Particularly in car stereos, attention has been paid to the electrification of tape insertion / ejection, but it is strongly desired to realize this at low cost and with high reliability.

A conventional tape recorder will be described below with reference to the drawings.

FIG. 5 shows a reproducing mechanism and a discharging mechanism of a conventional tape recorder.

Reference numeral 101 denotes a reproduction / stop switching cam, a cam lever 102 is engaged with the cam portion, and a gear on the outer peripheral portion meshes with a gear 107. 102 is a cam lever, one end of which is engaged with the head substrate 103. 103 is a head substrate. Ten
Reference numeral 4 denotes a head, which is fixed to the head substrate 103. Ten
5 is a discharge arm, one end of which is engaged with the cam 106,
Although not shown in the drawing, the tape is ejected by rotating it clockwise. 106 is a cam,
The cam surface and the discharge arm 105 are engaged for discharging. 107 is a gear, 108 is a gear, and the motor 109
Is arranged so as to reduce the rotation of and to transmit it to the cam 101. Reference numeral 109 is a motor for switching between reproduction and stop. 110 is a spring and one end is a discharge arm 1
The discharge arm 105 is urged in the counterclockwise direction during the reproduction and the stop while engaging with 05. 111 is a motor for ejecting the tape. 112 is a gear, 113
Is a gear, which reduces the rotation of the motor 111 and transmits it to the cam 106. Reference numeral 114 denotes a detection switch, which detects the rotation of a certain angle when the switch is closed by the protruding portion of the cam 106, and controls the rotation of the motor 111 by the control circuit. Reference numeral 115 is also a detection switch, and the rotation of the motor 109 is controlled by the control circuit by detecting the rotation of a certain angle by closing the switch at the protruding portion of the cam 101. 116 is a cassette tape.

The operation of the tape recorder configured as above will be described below.

FIG. 5 shows the stopped state. When it is desired to put the tape in a reproducing state, when the motor 109 is energized, the motor rotates in the arrow direction in the figure. The rotation of the motor 109 is
The speed is reduced by the gear 108 and the gear 107 that are engaged with each other, and then transmitted to the cam 101. When the cam 101 rotates in the direction of the arrow, the cam lever 102 having one end engaged with the cam surface rotates counterclockwise. The head substrate 103 engaged with the cam lever 102 moves in the direction of the arrow, and the head 104 fixed on the head substrate 103 moves the cassette tape 11
Although not shown in the drawing, the tape is run by a drive mechanism such as a capstan / reel stand to be in a reproduction state. The cam 101 rotates by a certain angle, and the next projection is closed again when the detection switch 115 is pressed, and the rotation of the motor 109 is stopped by the control circuit, so that the reproduction state remains. When the motor 109 is rotated again and the detection switch 115 is closed in the same manner, if the rotation is stopped, the motor returns to its original state and becomes a stopped state.

If you want to eject the tape next time, rotate the motor 111 in the direction of the arrow, and the meshed gear 112 and gear 113
Is decelerated by and transmitted to the cam 106. By the rotation of the cam 106, the ejection arm 105 engaged with the cam surface rotates in the clockwise direction to activate the tape pull-up mechanism and the tape pull-out mechanism (not shown in the figure) to eject the tape. When the ejection arm is rotated to the tape ejection completion position, the projection of the cam 106 is also in the position to close the detection switch 114 again, and the rotation of the motor 111 is stopped.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention However, in the above structure, the regeneration switching mechanism and the discharging switching mechanism are independent of each other, the number of parts is large, the cost is high, and the space is large. Was also a disadvantageous composition. In terms of reliability, there is a risk that the ejecting mechanism will work while the head is inside the cassette tape during playback due to a malfunction of the control circuit or detection switch, which may damage the mechanical section or the cassette tape. .

In view of the above problems, the present invention provides a highly reliable tape recorder that can be downsized at low cost.

Means for Solving the Problems In order to solve the above problems, a tape recorder according to the present invention has a drive source and a cam surface, and receives a driving force of the drive source at the time of operation switching and rotates by a certain angle. A cam lever, one end of which is engaged with the cam surface of the cam and which follows the cam surface when the cam is rotated by a certain angle, a playback interlocking member which is engaged with at least the head substrate, and a cassette tape ejection mechanism. A discharge interlocking member that engages with the discharge interlocking member, a first position that is attached to the other end of the cam lever or a lever that interlocks with the other end of the cam lever, and that is engageable with the reproduction interlocking member; A moving member that can be selectively moved to one of second positions that can be engaged with the moving member, and when the moving member is selected to the first position, the driving force of the driving source is changed when the operation is switched. Receiving a certain angle When the moving force of the cam lever that moves following the cam surface of the rotating cam is transmitted to the reproduction interlocking member via the moving member and the moving member is selected to the second position, The transfer force of the cam lever that moves following the cam surface of the cam that receives a driving force of the drive source and rotates at a constant angle during operation switching is transmitted to the discharge interlocking member via the moving member. It is a feature.

Action The present invention has the above-described configuration, in which the moving force of the cam lever taken out from one of the cam surfaces is provided on the other end of the cam lever or on the lever that interlocks with the other end of the cam lever. By selecting the engagement destination by the moving member that is selectively movable between the second positions, it is possible to selectively perform reproduction or cassette tape ejection, simplify the drive path, and By switching the engagement to any one of the ejections, the erroneous ejection of the cassette tape in the reproducing state is prevented.

Embodiment A tape recorder according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a reproducing / discharging switching mechanism in a stopped state of a tape recorder according to an embodiment of the present invention. Further, FIG. 2 shows a regenerated state, and FIG. 3 shows a discharged state. FIG. 4 shows a method of lifting and pulling out the cassette tape of the embodiment. Fig. 1 and 2
In FIGS. 3 and 3, reference numeral 1 denotes a cam, a cam surface of which is engaged with the cam lever 2 and projections for closing the detection switch 5 are provided at the stop position and the reproduction position. Reference numeral 2 denotes a cam lever, and a slide plate 12 slidably mounted on the lever is attached to the other end which is not engaged with the cam 1. Reference numeral 3 denotes a discharge arm, which can discharge only when it is engaged with the slide plate 12, and transmits the turning force of the cam lever 2 to the cassette tape lifting and pulling mechanism. Reference numeral 4 denotes a head substrate, which is configured to be pulled up by the cam lever 2 by engaging with the slide plate 12 and to be in a reproducing state. A detection switch 5 is opened and closed by rotation of the cam 1 to control the rotation of the motor 8. Reference numeral 6 denotes a gear, and 7 denotes a gear, which decelerates the rotation of the motor 8 and transmits it to the cam 1. 8 is a motor. A spring 9 has one end attached to the cam lever 2 and the other end attached to the slide plate 12. A plunger 10 is engaged with a plunger lever 11. Reference numeral 11 denotes a plunger lever, which slides the slide plate 12 by suction of the plunger 10 to switch the engagement destination. A slide plate 12 is slidably mounted on the cam lever 2. Reference numeral 13 denotes a spring, which urges the discharge arm 3 counterclockwise at the time of stopping and regenerating, and urges the discharge arm 3 clockwise after discharging. Reference numeral 14 denotes a head, which is fixed on the head substrate 4. 15 is a cassette tape.

In FIG. 4, 3 is the discharge arm described in FIGS. 1 to 3, the shaft 3D standing on the discharge arm 3 is engaged with the long hole 3B of the lift slider 18, and the tip of the discharge arm 3 is also shown. Also, a shaft 3A is erected, a discharge claw 20 is rotatably attached, and is urged counterclockwise by a spring 13.
A cassette tape 15 is held by the tape holder 16. Reference numeral 16 denotes a tape holder, which is engaged with the lift arm 19 and can move up and down. Reference numeral 17 is a guide A, and a guide plate is provided in a sliding groove provided on the lift slider 18.
The shaft set up on 17 is engaged. Reference numeral 18 denotes a lift slider, which is slidably attached to the left and right, and transmits the force of the engaging portion between the shaft 3D and the long hole 3B to the lift arm 19 by the engagement between the cam groove 18A and the shaft 18B. Reference numeral 19 denotes a lift arm, which is provided with a shaft 18B that enters the cam groove 18A. By engaging with the cam groove 18A of the lift slider 18, turning force is obtained, and the tape holder 16 is lifted. 20 is a discharge claw, which engages with the cassette tape 15 that has been lifted,
Pull out the cassette tape 15. Reference numeral 21 is a guide plate, and a shaft 20A standing upright on the ejection claw 20 is engaged by a cam groove 20B to control the operation of the ejection claw 20 so as to pull out the cassette tape 15.

The operation of the tape recorder configured as described above will be described with reference to the drawings.

First, FIG. 1 shows a regeneration and discharge switching mechanism in a stopped state, FIG. 2 shows the regeneration state, and FIG. 3 shows a discharge state. When the reproduction is started from the stop, the motor 8 is rotated in the arrow direction in FIG. The rotation of the motor 8 is reduced by the gears 7 and 6 and transmitted to the cam 1. As the cam 1 rotates, the engaged cam lever 2 rotates counterclockwise. When the plunger 10 is not sucking, the slide plate 12 attached to the cam lever 2 is biased by the spring 9 and is in the position shown by the solid line, and engages with the tip portion of the head substrate 4. The head substrate 4 is connected to the cam lever 2 via the slide plate 2.
, And when the cam lever 2 is rotated counterclockwise, the cam lever 2 is pulled to the left and is omitted in the drawing.
The drive of the reel stand and pinch roller starts. Head substrate 4
The head 14 fixed on the top of the tape enters the cassette tape 15 and comes into contact with the tape surface to be in a reproducing state, which is the state shown in FIG. When discharging from the stop, the plunger 8 is sucked at the same time as the motor 8 rotates in the direction of the arrow in FIG. The plunger lever 11 rotates counterclockwise by the suction of the plunger lever 10, contacts the slide plate 12 at the other end, and moves the slide plate 12 to the position shown by the broken line in the figure. The rotation of the motor is transmitted to the gear 7, the gear 6 and the cam 1 as in the case of the reproduction described above, and the cam lever 2 engaging with the cam 1 rotates counterclockwise. Since the slide plate 12 attached to the cam lever 2 is in the position shown by the broken line, when the cam lever 2 rotates counterclockwise, the discharge arm 3 and the slide plate 12 engage with each other, and the discharge arm 3 rotates clockwise. The cassette tape 15 is ejected by the method described later and the state shown in FIG. 3 is obtained. Next, FIG. 4 shows a method of lifting and pulling out the cassette tape. The lift slider 18 engaged with the discharge arm 3 by rotating the discharge arm 3 in the clockwise direction by the above-described method slides along the guide plate 17 in the sliding groove. The slide of the lift slider 18 causes the lift arm 19 that engages with the cam groove 18A of the lift slider 18 to rotate counterclockwise. The tape holder 16 attached to one end of the lift arm 19 holds the cassette tape 15 and is lifted by the rotation of the lift arm 19. Further, by rotating the discharging arm 3 in the clockwise direction, the discharging claw is rotatably attached to one end of the discharging arm 3.
20 is engaged with the cam groove 20B of the guide plate 21, and is engaged with the open hole portion and the thick portion of the cassette tape 15 that has been lifted up, and the cassette is moved rightward along the cam groove 20B of the guide plate 21. Move with tape 15. Discharge arm 3
The spring 13 attached to one end of the guide plate 21 and the guide plate 21 initially biases the discharge arm 3 in the counterclockwise direction, but when the discharge arm 3 rotates clockwise, it crosses the dead point. This time, the discharge arm 3 is urged in the clockwise direction to assist the rotation. Therefore, the ejection claw 20 also moves to the right and the cassette tape 15 is ejected. In the case of reproduction, the protrusion provided on the outer periphery of the cam 1 contacts the detection switch 5 in the closed state when the head substrate 4 is pulled up in FIG.
The control circuit stops the rotation of the motor 8 and maintains the reproduction state. In the case of discharging, in FIG. 3, the cam lever 2 rotates counterclockwise and the discharging arm 3 engaging with it rotates clockwise, and the discharging ends, but the motor 8 continues to rotate. When the cam lever 2 rotates in the opposite direction by the rotation of the cam 1 and returns to the original stop position, the protrusion on the outer periphery of the cam 1 pushes the detection switch 5 to close it and the rotation of the motor 8 is stopped. The ejection arm 3 is held by being biased by the spring 13 at the position where the ejection is completed, and stands by for the insertion of the cassette tape.

As described above, according to the present embodiment, a cam that rotates at a constant angle when the operation is switched, and a cam surface of the cam that engages with one member of which one end can be engaged with one of the two members. By providing a lever that can be switched to reproduction or tape ejection by selection, it is possible to reduce parts such as motors and cams compared to the case where a regeneration switching mechanism and an ejection mechanism are provided independently. The space can be reduced, which is advantageous for downsizing. Further, there is no danger of performing the ejecting operation with the head inside the cassette tape, and the electric control can be simplified as compared with the case of being independent.

Further, in this embodiment, the motor used for regeneration switching and discharging is provided exclusively, but it may be shared with the motor for driving the pinch roller and the reel stand by a method such as intermittently using the cam gear.

EFFECTS OF THE INVENTION As described above, the tape recorder of the present invention has a drive source and a cam surface, a cam that receives a driving force of the drive source when the operation is switched and rotates by a certain angle, and the cam having one end of the cam. A cam lever that engages with a surface and moves following the cam surface when the cam rotates by a certain angle; a playback interlocking member that engages at least the head substrate; and a discharge interlocking member that engages the cassette tape ejection mechanism, A first position attached to the other end of the cam lever or a lever interlocking with the other end of the cam lever, and a second position engageable with the reproduction interlocking member and a second position engageable with the discharge interlocking member. One of the two is provided with a movable member that is selectively movable, and when the movable member is selected in the first position, the cam of the cam that receives a driving force of the driving source and rotates by a certain angle when the operation is switched. On the cam surface When the moving force of the cam lever that moves following is transmitted to the reproduction interlocking member via the moving member, and the moving member is selected at the second position, the drive source is driven at the time of operation switching. By transmitting the moving force of the cam lever, which moves following the cam surface of the cam that rotates by a certain angle in response to the force, to the discharge interlocking member via the moving member, the regeneration switching mechanism and the discharging mechanism are respectively separated. Compared with the case where they are provided independently, it is possible to reduce parts such as a motor and a cam, and the space can be reduced, which is also advantageous for downsizing. Further, there is no danger of performing the ejecting operation with the head inside the cassette tape, and the electric control can be simplified as compared with the case of being independent.

[Brief description of drawings]

FIG. 1 is a plan view showing a reproduction / ejection switching mechanism in a stopped state of a tape recorder according to an embodiment of the present invention,
FIG. 2 is a plan view of the regenerated state, FIG. 3 is a plan view of the ejected state, FIG. 4 shows a method of lifting and pulling out the cassette tape, a is a plan view, b is a side view, and FIG. FIG. 6 is a plan view showing a reproduction switching mechanism and a discharging mechanism of the tape recorder of FIG. 1 ... Cam, 2 ... Cam lever, 3 ... Discharge arm, 4
...... Head substrate, 5 …… Detection switch, 6,7 …… Gear,
8 ... Motor, 9 ... Spring, 10 ... Plunger, 11 ...
Plunger lever, 12 …… Slide plate, 13 …… Spring, 14
...... Head, 15 …… Cassette tape, 16 …… Tape holder, 17 …… Guide plate, 18 …… Lift slider, 19 …… Lift arm, 20 …… Discharge claw, 21 …… Guide plate.

Claims (2)

[Claims] 1. A cam having a drive source and a cam surface, which rotates at a fixed angle by receiving the drive force of the drive source when switching operations, and one end of which engages with the cam surface of the cam, A cam lever that moves following the cam surface when rotating by a certain angle, and a reproduction interlocking member that engages at least the head substrate,
A discharge interlocking member that engages with the cassette tape ejecting mechanism, and a first position that is attached on the other end of the cam lever or on the lever interlocking with the other end of the cam lever and that is engageable with the reproduction interlocking member. A moving member that is selectively movable to one of second positions that can engage with the discharge interlocking member is provided, and when the moving member is selected to the first position, the drive source is selected when the operation is switched. Is transmitted to the reproduction interlocking member via the moving member, the moving force of the cam lever moving following the cam surface of the cam rotating by a certain angle in response to the driving force of the second moving member. When the position is selected, the moving force of the cam lever that moves following the cam surface of the cam that receives a driving force of the driving source and rotates a certain angle at the time of switching the operation is transmitted via the moving member. Ejection interlocking part Tape recorder, characterized in that it has transferred to. 2. The tape recorder according to claim 1, further comprising a plunger for controlling movement of the moving member between the first position and the second position.