JPS6152543B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a cassette changer.

Cassette changers used in conventional VTRs and tape recorders are generally integrated with the VTR or tape recorder body, making them relatively large and expensive, and it is not possible to upgrade the system by converting them into components. There was a drawback. Furthermore, in conventional cassette changers, the cassettes are arranged one on top of the other, making it difficult to see the display part of the cassette that displays the contents recorded on the magnetic tape inside the cassette, making operation inconvenient. There was a flaw. Furthermore, since the cassette is moved in the radial direction, the length in the radial direction increases, resulting in an increase in the size of the device.

The present invention was invented in view of such problems, and includes a turntable in which a plurality of cassette storage holding parts are formed along the circumferential direction, and the turntable has a plurality of cassette storage holding parts formed along the circumferential direction. The turntable is rotated with a cassette held in each of the plurality of cassette storage holding parts, and when the cassette held in one of the plurality of cassette storage holding parts moves to a predetermined position, the turntable stops. The cassette changer is configured such that the cassette is moved in a direction perpendicular to the surface of the turntable and mounted at a predetermined position. Therefore, according to the present invention, it is possible to provide a cassette changer with excellent operability and reduced size.

An embodiment in which the present invention is applied to a cassette changer in a cassette type VTR will be described below with reference to the drawings.

As shown in FIGS. 1 to 4, the cassette changer 1 has a flat square shape.
It is designed to be removably placed on the top surface of the VTR main body 2. This cassette chain engine 1 has a square frame 3 made of relatively thick aluminum forming its peripheral edge, and a relatively large circular opening 4 formed in the center of the frame 3. A disc-shaped turntable 5 is rotatably arranged. This turntable 5 has four rectangular cassette storage through holes 6 along its circumferential direction.
7, 8, and 9 are formed. These cassette storage through holes 6, 7, 8, and 9 are constructed to have the same size as the cassette 10. Further, a drive unit 11 for rotationally driving the turntable 5 is disposed at the center of the turntable 5. The turntable 5 is rotated by this drive section 11.

At the bottom of the turntable 5 is a cassette sliding plate 1.
2 is disposed, and the peripheral edge of this sliding plate 12 is fixed and supported by the lower step 13 of the frame 3. This cassette sliding plate 12 supports the bottom surface of the cassettes 10 held in the cassette storage through holes 6, 7, 8, and 9 of the turntable 5, and when the turntable 5 rotates, these cassettes 10 are It moves in the circumferential direction of the turntable 5 while sliding on the upper surface of the sliding plate 12. An opening 14 having substantially the same size as the through hole 6 of the turntable 5 is formed in the sliding plate 12 at a position corresponding to the through hole 6 of the turntable 5 in FIG. A cassette stand 15 on the VTR main body 2 side faces this opening 14, and this cassette stand 1
The upper surface of 5 is at the same height as the upper surface of sliding plate 12.

A cassette erroneous insertion detection switch 16, a cassette presence/absence detection switch 17, and a manual loading switch 18 are provided on the cassette stand 15.
The cassette erroneous insertion detection switch 16 is operated by a recess on the front end side of the bottom of the tape cassette 10.
The cassette detection switch 17 detects whether the cassette 10 has been moved onto the cassette stand 15 by the rotation of the turntable 5. , and a manual loading switch 18 is for manually loading the cassette 10 into the VTR main body 2. Note that this switch 18 is pressed via the cassette 10 on the cassette stand 15. Further, on the upper surface of the cassette sliding plate 12, at positions corresponding to the three openings 7, 8, and 9 of the turntable 5 in FIG. It is arranged.
Furthermore, on the left side of the frame 3 in FIG. 2 and on the lower surface of the turntable 5, four cassette number detection switches 21, 22, 23, and 24 are arranged in a line in the radial direction of the turntable 5. ing. And these detection switches 21, 22,
23, 24, convex actuators 25, 26, 27, 28 are provided near the outer periphery of the lower surface of the turntable 5 at 90° intervals. The detection switches 21, 22, 23, and 24 are arranged at different distances from the center of the turntable 5, respectively. Therefore, the cassette 10, which has been moved to a position corresponding to the opening 14 in FIG. , 23, 24. Furthermore, cassette select switches 29, 30, 31, and 32 are provided on the front surface of the cassette changer 1 to select the cassette 10 in cooperation with the detection switches 21, 22, 23, and 24.

A pair of positioning pins 33 and 34 are implanted in the bottom surface of the cassette sliding plate 12 so as to protrude downward, and these pins 33 and 34 are connected to the VTR, respectively.
Pin insertion guide 14 provided on the main body 2 side
6, 147 (see FIG. 10), and the cassette changer 1 is positioned relative to the VTR main body 2. Further, rubber legs 35 are provided on the lower surface of the frame 3, and the cassette changer 1 is placed on the upper surface of the VTR main body 2 by means of these legs 35.

Next, details of the drive unit 11 for rotationally driving the turntable 5 will be explained with reference to FIGS. 5 to 8. A circular opening 37 is formed in the center of the turntable 5. A guide ring 38 is fixed to the inner circumferential surface of the guide ring 38. The inner peripheral surface of this guide ring 38 has three rollers 3.
It is in contact with 9, 40, 41, and these Koro 3
Flange portions 42 and 43 formed above and below 9, 40 and 41 are in contact with the upper and lower surfaces of the guide ring 38, respectively. Thereby, the turntable 5 is supported rotatably about the axis while being positioned in the axial direction. The rollers 39, 40, and 41 are each rotatably supported by a chassis 44 of the drive unit 11 via a pin 45, and the chassis 44 is fixedly attached to the center portion of the cassette sliding plate 12. .

A motor 46 is mounted on the chassis 44, and a belt 49 is stretched between a pulley 47 and a pulley 48, which are fixed to the rotating shaft of the motor 46. The pulley 48 is rotatably supported by the chassis 44 via a frame 50. A pinion 51 is coaxially connected to this pulley 48.
is fixed, and this pinion 51 connects to the gear 52.
It meshes with the This gear 52 has a pinion 53
are fixed coaxially, and this pinion 53 meshes with a gear 54. A pinion 55 is coaxially fixed to the gear 54. The pinion 55 meshes with the gear 56. This gear 56 is connected to the guide ring 38 and the turntable 5.
The internal gear 57 is separably meshed with an internal gear 57 fixed to the inner peripheral surface of the internal gear. The pulley 48, pinion 51, gear 54, and pinion 55 are arranged coaxially and rotatably supported by a common support shaft 58. A support lever 59 is rotatably supported on the support shaft 58, and the gear 56 is rotatably supported at the tip of the lever 59.

Further, a plunger solenoid 60 is horizontally fixed and arranged on the chassis 44. A pin 62 is embedded in the rod 61 of the plunger solenoid 60, and a coil spring 64 is stretched between the pin 62 and a pin 63 on the chassis 44. Further, the pin 62 of the rod 61 is loosely fitted into a long hole 66 formed in the lock lever 65. The lock lever 65 is rotatably supported by a fulcrum pin 67 installed on the chassis 44. And this lever 65 has a key 6
8 is fixed. Corresponding to the keys 8, four key grooves 69 are formed on the inner peripheral surface of the guide ring 8 at intervals of 90 degrees. Also lever 65
An arm 70 is integrally formed with the arm 70, and a tip 71 of the arm 70 is in contact with a pin 72 implanted in the support lever 59.

Next, the cassette stand 15 provided on the VTR main body 2 side and the elevating device for the cassette stand 15 will be explained with reference to FIGS. 9 to 15. The cassette stand 15 is formed of a substantially rectangular plate. A pair of circular openings 74 for inserting the reel shafts on the left and right sides are formed approximately in the center thereof.
In addition, as shown in FIG. 10 of the cassette stand 15, a notch 75 having a substantially V-shape is formed at the upper end, and a loading pin is inserted from this notch 75 into a recess formed at the bottom of the cassette 10. The magnetic tape in the cassette 10 is pulled out using the cassette 10. Also, on this cassette stand 15, as already mentioned, there is a cassette incorrect insertion detection switch 1.
6, a cassette presence/absence detection switch 17, and a manual loading switch 18 are provided. Furthermore, on the back side of the cassette table 15, stoppers 76 and 77, each consisting of a pair of leaf springs, are supported at the upper left and right sides in FIG. 10 by a pair of pins 78, respectively, so as to be slidable in the vertical direction in FIG. There is. These stoppers 76 and 77 are
It is not used during automatic 0 exchange, but is used during manual exchange. That is, by moving the stoppers 76 and 77 upward relative to the cassette table 15 in FIG. In the figure, it projects upward from the upper edge, thereby receiving the front end of the cassette 10.

Elevating levers 81 and 82 are arranged on both sides of the cassette holder 15, respectively, and these elevating levers 81 and 82 are folding levers that are integrally connected to both sides of the cassette holder 15 in FIG. The bent pieces 15a and 15b are rotatably connected to each other via pins 80 and 83. Further, these lifting levers 81 and 82 are fixed to a common support shaft 84. The support shaft 84 is rotatably supported at both ends by a pair of brackets 85 and 86 attached to the chassis of the VTR main body.

As particularly shown in FIG. 11, the left lifting lever 81 in FIG.
is formed. A pin 90 implanted at one end of the L-shaped lever 89 is loosely fitted into the opening 88. This lever 89 is rotatably supported by the bent piece 15a of the cassette stand 5 via a pin 91, and the pin 92 implanted at the other end of this lever 89 is attached to the bent piece 94 of the slider 93. is connected to. The slider 93 is the cassette stand 15
It is slidably supported on the cassette base 15 by a pair of pins 95 planted on the back surface of the cassette base 15. A coil spring 97 is connected between the pin 96 implanted in the slider 93 and the pin 95.
is stretched, thereby biasing the slider 93 to the left in FIG. The cassette 1 is connected to the tip of the slider 93 via a leaf spring 98.
Lock release claw 9 for unlocking the lid of 0
9 are connected. This release claw 99 is formed in the shape of a right triangle and faces the opening 100 of the cassette stand 15. When the cassette table 15 is in the upper position as shown in FIG.
Since the coil spring 9 is prevented from rotating counterclockwise in FIG.
7 is also prevented from sliding to the left in FIG. 11 of the slider 93. Therefore, the release claw 99 is moved downward by the cam action of the inclined portion 101 of the release claw 99, and the leaf spring 98 is in an elastically deformed state. That is, at this time, since the release claw 99 does not protrude to the upper surface of the cassette stand 15 through the opening 100, the lid of the cassette 10 is not unlocked when the cassette stand 15 is in the raised position.

Next, the mechanism for driving the lift lever 81 will be described. This lever 81 is formed with a U-shaped notch 102, and a roller 103 is received within this notch 102. Kokoro 103
is rotatably supported on the end face of the disc 104. A pin 105 is implanted on the surface of the disk 104 opposite to the surface on which the rollers 103 are attached. Corresponding to this pin 105, a limit switch 106 for raising and lowering the cassette table 15,
107 is attached to the bracket 85. Further, the disc 104 is fixed to one end of a rotating shaft 109 that is rotatably supported by a bearing 108 held by a bracket 85, and a gear 110 is fixed to the other end of this rotating shaft 109. ing. This gear 110 meshes with a pinion 111. And coaxially to the pinion 111 is the gear 1.
12 are fixed, and these pinions 111
and gear 112 are rotatably supported by a support shaft 113 held by a bracket 85. Further, the gear 112 meshes with a gear 115 fixed to the rotating shaft of the motor 114.

Guide blocks 116 and 117 are fixed to both sides of the cassette stand 15. In FIG. 10, a slit 118 is formed in the left guide block 116 in the vertical direction, and the cross section fixed to the chassis 119 of the VTR main body 1 is L.
The tip of the bent piece of the letter-shaped guide plate 120 engages with this slit 118. Further, a pair of rollers 121 are rotatably provided on the right guide block 117, and between these rollers 121, a bent piece of a guide plate 122 having an L-shaped cross section is also fixed to the chassis 119. The tip of the is inserted. This allows the cassette table 15 to be more accurately maintained in a horizontal position when it is raised or lowered.

Further, the pair of guide plates 120 and 122 include
A mechanism is provided to press down the upper surface of the cassette 10 that has descended together with the cassette stand 15. These mechanisms will be explained with particular reference to FIGS. 11 and 13. In addition, left and right cassette 1
Since the mechanism for holding down the 0 is the same, the mechanism on the left side in FIG.
A rail 123 having a guide surface cut into a U-shaped cross section is vertically attached to the rail 123 . A slider 124 is slidably held by this rail 123. Note that this slider 124
Both sides of the slider 124 are held down by a pair of holding plates 125 so that the slider 124 does not fall off the guide surface of the rail 123. And this slider 124
A coil spring 127 is stretched between the locking piece 126 fixed to the rail 126 and the upper end of the rail 123, and the slider 124 is urged to slide upward. The slider 124 also has a pair of pins 12 implanted in the slider 124.
8 and 129, the limiter plate 130 is slidably supported with respect to the slider 124. The bent piece 131 at the bottom of this limiter plate 130 and the pin 1
A coil spring 133 is stretched between the limiter plate 130 and a locking piece 132 provided at the limiter plate 28, thereby urging the limiter plate 130 to slide upwardly with respect to the slider 124.

A U-shaped notch 134 is formed at the upper end of the slider 124, and this notch 134
The lower end of the connecting lever 135 is received, and the pin 1
The connecting lever 135 connects to the slider 124 via 36.
It is rotatably supported. This connecting lever 135 is connected to the pin 1 by a coil spring 137.
It is urged to rotate counterclockwise in FIG. 13 about 36. Also, this connecting lever 135
A cassette holder 138 having a bent tip is attached to the upper end of the cassette holder 138. This cassette presser foot 138 is
When the cassette 10 is lowered together with the cassette stand 15, the upper surface of the cassette is pressed down. A cam plate 139 having a substantially triangular shape is attached to the rear side of the connecting lever 135, and when the slider 124 is lowered, the connecting lever 139
35 is configured to rotate.

On the chassis 119 of the VTR main body 2, there is a first
As shown in Figure 0, there are two pairs of cassettes 1 at the front and rear.
0 height regulating pins 140, 141 are implanted, and correspondingly, a pair of openings 142, 143 are formed in the front and rear of the cassette stand 15, respectively. Therefore, when the cassette 10 is lowered with the lowering of the cassette stand 15, the bottom of the cassette 10 is raised to a predetermined height by the pins 140, 141 which relatively protrude above the cassette stand 15 through the openings 142, 143. It will be regulated accordingly. Also, on the chassis 119, there are a pair of brackets 14 on the left and right.
Positioning guide 146,1 via 4,145
47, and the cassette positioning pins 33, 3 provided on the cassette changer 1
4. Further, a fixed cam 148 for opening the lid of the cassette 10 is fixed on the chassis 119, and a fixed cam 148 is fixed on the chassis 119 to open the lid of the cassette 10.
This fixed cam 148 is attached to the cassette base 15 so as to push the lid of the cassette 10 as the cassette 10 moves downward.
A notch 149 is formed at a position corresponding to.

Next, the operation of the cassette changer 1 constructed as described above will be explained.

First, the four cassettes 10 are respectively stored in the four cassette storage through holes 6, 7, 8, and 9 formed in the turntable 5 of the cassette changer 1. Whether these cassettes 10 are correctly accommodated in the through holes 6, 7, 8, and 9 is determined by the three pairs of cassette incorrect insertion detection switches 19 on the cassette sliding plate 12, the cassette presence/absence detection switch 20, and the cassette stand. Cassette incorrect insertion detection switch 16 on 15, cassette presence/absence detection switch 1
7. That is, only when the cassette erroneous insertion detection switches 16, 19 are not pressed and the cassette presence/absence detection switches 17, 20 are pressed, the corresponding cassette 10 will correctly perform the operation described below.

The four cassettes 10 are correctly placed on the turntable 5.
When the cassette is placed on the top, the cassette select switches 29 and 3 provided on the cassette changer 1 are activated.
Press one of the switches 0, 31, and 32. Then, in the state shown in FIG. 6, the plunger 60 of the turntable driving section 11 is energized, and the rod 61 moves to the left in FIG. 6 against the coil spring 64. Then, the lock lever 65 connected to this rod 61 via the pin 62
rotates counterclockwise in FIG.
8, the turntable 5 is unlocked and becomes free to rotate as shown in FIG.

Furthermore, at the same time as the turntable 5 is unlocked, power is supplied to the motor 46 and the motor 46 starts rotating. This motor 46
The rotation is performed by pulley 47, belt 49, pulley 48,
Pinion 51, gear 52, pinion 53, gear 5
4. The rotation is transmitted to the internal gear 57 via the pinion 55 and the gear 56, and the turntable 5 to which the internal gear 57 is fixed rotates slowly. As a result, the four cassettes 10 whose sides are held in the through holes 6, 7, 8, and 9 of this turntable 5 are raised to the same height as the cassette sliding plate 12 and this sliding plate 12. The turntable 5 is moved in the circumferential direction of the turntable 5 while sliding on the cassette stand 15.

and cassette select switches 29, 30,
When the cassette 10 selected by one of the cassettes 31 and 32 is moved to a position corresponding to the cassette stand 15, the actuator 25, which is provided on the lower surface of the turntable 5 and corresponds to the cassette 10, One of 26, 27, 28 corresponds to the cassette number detection switch 21, 2.
One of 2, 23, and 24 will be pressed. Then these switches 21, 22, 23,
Based on the detection of one of 24, the plunger 6
0 is deenergized and the rod 61 is moved to the right in FIG. 5 by the coil spring 64. Then, the lock lever 65, which is connected to the rod 61 through the pin 62, rotates clockwise in FIG. 5 about the fulcrum pin 67, and as shown in FIG. 68 enters a keyway 69 formed on the inner peripheral surface of the guide ring 38, and the turntable 5 connected to this guide ring 38 is locked and cannot rotate. Further, when the lock lever 65 rotates as the plunger 60 is deenergized, the tip 71 of the arm 70 of the lever 65 presses the pin 72. Then, the support lever 59 on which this pin 72 is implanted will rotate the coil spring 1 around the support shaft 58.
50 in the clockwise direction in FIG. Then, as shown in FIG. 6, the gear 56 supported at the tip of the lever 59 is separated from the internal gear 57. Also, when one of the cassette number detection switches 21, 22, 23, 24 is pressed,
The motor 46 rotates in reverse for a while from that moment, and then this motor 46 stops. In this way, the rotational position of the turntable 5 is correctly set by locking with the key 68, separating the gear 56, and reversing the motor 46, and the drive unit 11 is subjected to a large load at this time. It will not be damaged by receiving it.

The cassettes 10 selected in advance as described above
When the turntable 5 stops rotating at the position where it is correctly placed on the cassette stand 15, the rotation of the turntable 5 is stopped, and then the rotation of the turntable 5 is shown in FIGS.
Motor 1 for lifting and lowering the cassette table 15 shown in FIG.
14 starts rotating and the cassette stand 15 descends. To explain this operation particularly with reference to FIGS. 10 and 11, the rotation of the motor 114 is caused by the rotation of the gear 11.
5. Transmitted to the disc 104 via the gear 112, pinion 111, gear 110 and rotating shaft 109, and the disc 104 is connected to the rotating shaft 109 in FIG.
rotate clockwise around the axis of Then, the rollers 10 planted on the end face of this disc 104
3 presses the side of the notch 102 of the lift lever 81 to rotate the lever 81 clockwise in FIG. 11 about the axis of the support shaft 84. Note that the lift lever 82 on the right side in FIG. 10, which is connected to this lever 81 by a support shaft 84, also rotates in the same manner. Then these levers 81, 82
The cassette stand 15 is connected to the guide plate 12 through the pins 80 and 83, and the guide plate 12 engages with the slit 118 of the guide block 116 at both ends thereof.
0 and a pair of rollers 121 attached to the guide block 117
2, it descends while maintaining a horizontal posture.

When the lift lever 81 rotates clockwise about the axis of the support shaft 84 in FIG. It will be separated from pin 90 of 89. Therefore, the lever 89 can freely rotate counterclockwise around the pin 91 in FIG. Move to the left in FIG. Then, the lock release pawl 9 connected to this slider 93 via a leaf spring 98
9 also moves to the left, and this lock release claw 99 faces the opening 100 of the cassette stand 15. Therefore, the lock release pawl 99 projects from the opening 100 onto the upper surface of the cassette stand 15 as shown in FIG. 12 due to the elastic restoring force of the leaf spring 98. Then, this lock release claw 99 releases the lid 15 of the cassette 10.
1 is released, and as the cassette 10 is lowered, the lid 151 comes into contact with the fixed cam 148 on the VTR main body 2 and is opened as shown in FIG.

Also, by lowering the cassette stand 15, this stand 1
The cassette 10 on the VTR body 2 is correctly positioned in the vertical direction at the cassette mounting position of the VTR main body 2. This operation will be explained with particular reference to FIGS. 13 to 15. When the cassette stand 15 gradually descends from the raised position shown in FIG. As shown in the figure, it comes into contact with the bent piece 152 at the upper end of the limiter plate 130 and presses the limiter plate 130 downward. Then, the slider 124, which is slidably supported by the limiter plate 130 and which is connected to the limiter plate 130 by the coil spring 133, is also pressed downward. For this purpose, this slider 124 and pin 13
The connecting lever 135 connected via 6 is
A cam plate 139 fixed to this lever 135
Since the stepped portion 153 at the lower end receives a reaction force from the upper end of the rail 123, this reaction force causes it to rotate clockwise in FIG. 13 about the pin 136 against the coil spring 137. and slider 1
24 is lowered, the inclined portion on the rear side of the cam plate 139 comes into contact with the guide surface of the rail 123 as shown in FIGS. The cassette presser 138 provided at the upper end of the connecting lever 135 presses the upper surface of the cassette 10 and presses the cassette 10 against the cassette stand 15.

In this way, the cassette 10 is
As a result, the cassette table 15 is pressed against the cassette table 15 and descends downward. When the cassette stand 15 is lowered to a predetermined position, the cassette height regulating pins 140 and 141 installed on the chassis 119 of the VTR main body 2 move into the opening 14 of the cassette stand 15.
2, 143 and protrudes relatively to the upper surface of the cassette stand 15 to press the bottom surface of the cassette 10. Therefore, the cassette 10 cannot be lowered any further, and at this position, the cassette 10 is restricted in the vertical direction and stands still. However, the cassette stand 15 will be further lowered by a slight stroke, and the pin 8 connected to this cassette stand 15 will be lowered.
0 continues to press the bent piece 152 of the limiter plate 130. However, the cassette presser foot 138 that engages with the top surface of the stationary cassette 10 is connected to the connecting lever 1.
Since the slider 124, which is connected via the cassette 35 and the pin 136, can no longer move downward, the slider 124 also stops at a position corresponding to the stop position of the cassette 10. Therefore, as the cassette table 15 further descends by a slight stroke, the limiter plate 130 moves toward the slider 12.
4 and lowers, thereby stretching the coil spring 133 stretched between the slider 124 and the limiter plate 130. The elastic restoring force of the coil spring 133 is transmitted to the cassette 10 via the slider 124, the pin 136, the connecting lever 135 and the cassette holder 138. will be under pressure. In other words, the coil spring 133 acts as a limiter spring.

When the cassette table 15 is lowered to the position shown in FIG. 15, the lift lever 81 is rotated to a nearly horizontal position as shown in FIG.
At this time, the disc 104 for rotating the lift lever 81 rotates about 1/2, and the pin 105 implanted in the disc 104 moves the micro switch 1.
You will have to press 07. With this, this disk 1
The motor 114 driving the cassette base 15 stops rotating, thereby completing the lowering operation of the cassette base 15 and stopping at the position shown in FIG. When the cassette is installed in the position shown in FIG. 15, it is detected by a detection switch (not shown), and the magnetic tape is pulled out from the front opening of the cassette 10, which is opened by rotating the lid 151, and placed in a predetermined position. The bridge will be installed on the tape running path. After the tape is mounted in this way, by operating the function switch 154 of the VTR body 2 or by commands from the function switch 154 established in advance, the VTR 2 can be set to, for example, the recording mode or the playback mode. The mode is switched and a new signal is recorded on the magnetic tape, or a signal recorded on the magnetic tape is reproduced.

Next, the operation of taking out the cassette 10 which has been recorded and reproduced in this manner will be described. This operation is almost the opposite of the cassette insertion operation described above, so to give an overview, the eject button 154 is pressed after the VTR main body is switched to the stop mode. First, the magnetic tape is unloaded, and the magnetic tape mounted on the tape running path is rewound into the cassette 10. When the unloading operation is completed, the motor 114 rotates in the opposite direction, and the disk 85 rotates counterclockwise in FIG. 12. Then the lift lever 8
1 rotates counterclockwise about the axis of the support shaft 84, and the cassette stand 15 moves up and down accordingly. As the cassette stand 15 moves, the pressure on the cassette 10 by the cassette presser 138 is also released, and the lid 151 of the cassette 10 is moved by the fixed cam 1.
Close to get away from 48. Furthermore, as the cassette stand 15 rises, the lock release claw 99 retracts below the cassette stand 15 as shown in FIG. The opening is closed.
Then, as shown in FIG. 11, when the disk 104 rotates approximately 1/2 in the counterclockwise direction, the pin 105 of the disk 104 pushes the micro switch 106 to stop the motor 114. As a result, the lifting operation of the cassette stand 15 is stopped, and the cassette stand 15 is maintained at the same height as the sliding plate 12 of the cassette changer 1.

The cassette 10 is taken out in the manner described above. After this, one of the cassette select switches 29, 30, 31, and 32 is pressed, the turntable 5 rotates again, and the newly selected cassette 10 is automatically selected as the VCR in the same manner as described above. It will be attached to the main body 2 for recording and reproduction.

Next, a modification of the above embodiment will be explained with reference to FIGS. 16 and 17. The cassette changer 160 of this modification has a square flat base 1.
61, and a square turntable 162 placed on the base 161, each corner of which is sloped and cut out. This turntable 162 is the drive unit 1
It is connected to the base 161 via a connector 63, and is configured to be rotationally driven relative to the base 161 by the drive unit 163. Four cassette storage holding parts 164 are formed in a concave shape on the lower surface of the turntable 162 and are open facing each side of the table 162, and these storage holding parts 164 hold the cassette 165. It is becoming more and more common. In this modification, the cassette 165 is inserted from the outside in the radial direction with respect to the rotational direction of the turntable 162. Furthermore, this cassette 165
In order to facilitate insertion and removal of the turntable 162, the base 161 is formed with four recesses 166 extending in the radial direction of the turntable 162. Also in this cassette changer 160, a pair of positioning pins 167, 16 are provided on the lower surface of the base 161.
8 is implanted, and these pins 167, 16
8, the cassette changer 160 is placed on the VTR body. Note that cassette 1 is installed at the position of the base 161 that corresponds to the position where the cassette of the VTR is installed.
A rectangular through hole 169 having approximately the same size as the through hole 65 is formed, and when the turntable 162 rotates and the cassette 165 moves to a position corresponding to the through hole 169, the cassette 165 is moved as in the above embodiment. is configured so that it can be moved downward and attached to the VTR body.

Although the present invention has been described above with reference to embodiments and modifications thereof, the embodiments and modifications described above do not limit the present invention, and various changes can be made based on the technical idea of the present invention.

For example, in the above embodiment, the present invention is applied to a cassette changer for a VTR, but the present invention can also be applied to various types of equipment using a cassette, such as a cassette changer for a tape recorder.

As described above, the present invention moves the cassette held on the turntable by the rotation of the turntable, and moves the cassette at a predetermined position in a direction perpendicular to the surface direction of the turntable. Since the structure is such that the cassette is mounted at a predetermined position, the radial length can be shortened and the cassette can be downsized. You can check the information directly, making it convenient for operation. Furthermore, the cassette changer can be constructed relatively flat, and the cassette can be easily connected to equipment to which the cassette is attached, making it possible to upgrade the system by making it into components.

[Brief explanation of the drawing]

The drawings show an embodiment in which the present invention is applied to a cassette changer for a cassette-type VTR. Fig. 1 is an external perspective view of the cassette changer attached to the VTR body, and Fig. 2 is a plan view thereof. , 3rd
FIG. 4 is a longitudinal sectional view of the cassette changer, FIG. 5 is a plan view of the drive section of the turntable, and FIG. 6 is a plan view of the drive section with the turntable locked. FIG. 7 is a vertical cross-sectional view of the drive section of the turntable, FIG. 8 is an exploded side view of the gear train that drives the turntable, FIG. 9 is a perspective view of the main parts of the cassette stand and its lifting mechanism, and FIG.
Figure 0 is the same plan view, Figure 11 is the XI in Figure 10.
-XI line cross-sectional view, Figure 12 is a cross-sectional view similar to Figure 11 with the cassette table lowered, Figure 1
3 is a sectional view taken along the line ~ in FIG. 10, FIG. 14 is a sectional view similar to FIG. 13 with the cassette stand partially lowered, and FIG. 15 is a sectional view with the cassette stand completely lowered. 14 is a cross-sectional view similar to FIG. 13. 16 and 17 show a modification of the above embodiment, FIG. 16 being a plan view of the cassette changer of this modification, and FIG. 17 being a front view thereof. In addition, in the symbols used in the drawings, 5...turntable, 6...through hole for storing cassette, 7...
Through hole for cassette storage, 8...Through hole for cassette storage, 9...Through hole for cassette storage, 10...Cassette.

Claims (1)

[Claims] 1. A turntable is provided with a plurality of cassette storage holding parts formed along the circumferential direction, and the turntable is rotated with a cassette held in each of the plurality of cassette storage holding parts, One of the multiple cassette storage holding parts
When the cassette held by the turntable moves to a predetermined position, the turntable stops and the cassette moves in a direction perpendicular to the surface of the turntable and is mounted at a predetermined position. A cassette changer characterized by: