JPS6353626B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tape cassette mounting device for a tape recorder that performs tape cassette mounting and ejection operations by reversing a motor in the normal direction. To provide an inexpensive and highly reliable tape cassette mounting device that performs switching in conjunction with tape cassette loading and unloading operations, simplifies a motor control circuit, and improves motor utilization efficiency.

Generally, in car decks, etc., a tape cassette (hereinafter simply referred to as a cassette) is inserted into the front opening of the device, the cassette is transferred horizontally and then vertically, installed at a predetermined position in the device, and then ejected by the reverse operation. Many things are used. In most cases, the cassettes are loaded and ejected purely mechanically using spring force or the like. Also,
Some devices load and eject cassettes by reversing the motor in the normal direction, but this requires a control circuit to switch between the forward and reverse directions of the motor, which increases the cost of the motor control circuit and reduces the efficiency of motor usage. It had the following problems. That is, in a system using a switching operation of a transistor in a motor control circuit, a voltage drop occurs due to the transistor, and the voltage applied to the motor decreases, resulting in a decrease in driving force. Another possible method is to use a relay in the motor control circuit, but this method has the drawback of being expensive.

The present invention has been made to solve the above-mentioned problems, and the present invention will be explained below with reference to drawings of embodiments.

The drawings show one embodiment of the present invention, and in FIGS. 1 and 2, a tape running motor 4 and a cassette transporting motor 6 are attached to a substrate 2. A motor pulley 8 is attached to the cassette transfer motor 6.
A belt 10 is wound between the pulley 12 and the pulley 12. Further, the pulley 12 is provided with a worm portion 12a. Guide plate 3 fixed on board 2
0 has a shaft 14 and a shaft 18 implanted, and the shaft 14
A gear 16 and a gear 22 are attached to the shaft 18, and a gear 20 is attached to the shaft 18.
are each supported. The gear 16 is integrally formed with a worm wheel 16a and a small diameter gear 16b, and the worm wheel 16a meshes with the worm portion 12a of the pulley 12 described above.
Further, the gear 16b is a large-diameter gear portion 20 of the gear 20.
The small diameter gear portion 20b of the gear 20 is further meshed with the gear 22.

The cassette transfer member 24 has a bent portion 24a as shown in FIG.
b is provided. The rack 24b of the cassette transfer member 24 meshes with the aforementioned gear 22. Further, the cassette transfer member 24 has fitting holes 24c, 2
4d, each with a sliding plate 26
The shafts 28a and 28b are fitted onto the shafts 28a and 28b, and are stopped by a retaining ring (not shown). On the other hand, the slide plate 26
8a and 28b are fitted into elongated holes 32 of the guide plate 30, and are slidably supported on the guide plate 30 by being stopped by a retaining ring (not shown). Therefore, the cassette transfer member 24 is also slidably guided by the guide plate 30.

Shafts 40a and 40b are installed in the control plate 38, and these shafts 40a and 40b fit into elongated holes 34a and 34b of the guide plate 30, respectively, and are stopped by a retaining ring (not shown). A plate 38 sandwiches the slide plate 26 and guides the guide plate 30 in a slidable manner. In addition, the control board 3
8 is provided with a long hole 42. On the other hand, the guide plate 30 is provided with a hook-shaped elongated hole 36, and the slide plate 26 is provided with cam portions 26a, 26b, and 26c, and as shown in FIG. It penetrates through the section and is stopped by a retaining ring (not shown). These cam parts 26a, 26
b, 26c, the elongated hole 42, and the operation of the guide shaft 58 will be explained using FIGS. 6 and 7. FIG. 6 is a side view of the device, and FIG. 7 is a partially enlarged view thereof. When waiting for cassette insertion,
As shown in FIGS. 6a and 7a, the guide shaft 58 fits into the stepped portion 36b of the elongated hole 36 of the guide plate 30, and also faces the flat cam portion 26a of the slide plate 26. At this time, since the guide shaft 58 of the control plate 38 is fitted into the elongated hole stepped portion 36b of the guide plate 30,
It is locked and cannot be moved. When a cassette is inserted, the motor 6 starts rotating as described later, power is transmitted to the cassette transfer member 24 via a belt, gears, etc., and the slide plate 26 connected to the cassette transfer member 24 also moves. At this time, the control plate 38 remains locked. When the slide plate 26 moves further, FIGS. 6b and 7b
The inclined cam portion 26c engages with the guide shaft 58 as shown in FIG.
and the control plate 38 along the elongated hole 42. When the guide shaft 58 moves to the flat part 36a of the elongated hole 36, the control plate 38 is unlocked, power is transmitted from the slide plate 26 to the control plate 38 via the guide shaft 58, and the control plate 38 moves to the slide plate 26. Start moving with. When ejecting the cassette, motor 6
is reversed to slide the cassette transfer member 24 and slide plate 26 in the opposite direction. At this time, the inclined cam portion 26b of the slide plate 26 pushes the guide shaft 58, thereby simultaneously moving the control plate 38. When the guide shaft 58 reaches the end 36c of the elongated hole 36, the inclined cam portion 26b of the slide plate 26 moves the guide shaft 58 to the elongated hole step portion 36b and the elongated hole 4 of the control plate 38.
2, and the state is again shown in FIGS. 6a and 7a. Control plate 38 is locked again and only slide plate 26 and cassette transfer member 24 move. The control plate 38 has a cam groove 4 as shown in FIG.
4, and a roller 56 attached to a cassette holding member 54 is fitted into the cam groove 44. As shown in FIG. 2, the cassette holding member 54 is rotatably supported by a shaft 52 installed in the cassette guide 50 and a shaft 96 installed in the rising portion 100a of the guide base 100. Also,
Leaf springs 60, 60 are attached to the cassette holding member 54. When the control plate 38 moves, the roller 58 of the cassette holding member 54 is guided by the cam groove 44 and moves, causing the cassette holding member 54 to rotate, and when the cassette is installed, the leaf spring 60,
60 presses the cassette from above and releases the pressure when the cassette is ejected.
Further, a rack 46 is provided on the bent portion 38a of the control board 38, and a rack 46 is provided on the bent portion 38a of the control board 38, and a rack 46 is provided on the bent portion 38a of the control board 38.
It meshes with a gear 64 rotatably supported by 2. Further, the gear 64 meshes with a rack 66a of the cassette lifting member 66, and transmits the movement of the control plate 38 to the cassette lifting member 66 via the gear 64.

FIG. 8 shows the rising portion 2b of the substrate 2 in FIG.
FIG. 2 is a cutaway view seen from direction B shown in FIG. 2; The cassette lifting member 66 is connected to the rising portion 2 of the substrate 2.
The two shafts 68, 70 and the elongated hole 66b planted in b
It is slidably guided by. Further, the cassette lifting member 66 is provided with a hook-shaped cam groove 72, into which a shaft 76 implanted in the lifter 74 is fitted. As shown in FIGS. 2 and 8, the lifters 74 and 80 are rotatably supported by shafts 68 and 84, and shafts 70 and 86, respectively, and support the cassette from below. Also, lifter 7
4. The lifter 80 is provided with a gear portion 78 and a gear portion 82, respectively, and these gear portions are configured to mesh with each other so that the lifter 74 and the lifter 80 rotate in opposite directions. When the cassette elevating member 66 moves, the shaft 76 provided on the lifter 74 moves along the cam groove 72, and the lifter 74
The lifter 80 rotates to raise and lower the cassette while keeping it horizontal.

The cassette transfer member 24 extends toward a guide base 100 mounted above the base plate 2, as shown in FIG. 2, and has a shaft 88 implanted at its end. A cassette hooking member 90 is rotatably supported on the shaft 88, and the cassette hooking member 90 is rotated counterclockwise by a spring 94 applied between the rising portion 90b and the bent portion 24e of the cassette transfer member 24. is receiving force. The cassette hooking member 90 is provided with a hook 90a that projects into the cassette insertion path, and when the cassette is transferred, it fits into the pinch roller insertion hole of the cassette and functions to hold the cassette. Further, a shaft 92 is embedded in the cassette hooking member 90, and the guide base 1
In cooperation with the cam groove 102 of 00, the hook 90a of the cassette hook member 90 is movable between the position where it is inserted into the pinch roller insertion hole of the cassette and the position where it is removed from the cassette. Further, the guide base 100 is provided with a rising portion 100b,
The cassette is guided together with the cassette guide 50 when the cassette is horizontally transferred. The cassette insertion detection arm 106 is connected to a shaft 10 mounted on the guide base 100.
4, and receives a biasing force in a counterclockwise direction by a spring (not shown). The cassette insertion detection switch 108 operates when a cassette is inserted and the cassette insertion detection arm 106 rotates clockwise.

The switch 110 for maintaining the cassette ejection state is
It is normally in a closed state, and when the cassette is completely loaded, it is pressed by the bent portion 24f of the cassette transfer member 24 and becomes in an open state. Further, when the ejection of the cassette is started, the closed state is again established. The switch operating plate 114 is provided with elongated holes 114a and 114b. On the other hand, the guide base 100 has a shaft 11
6,118 are planted, each with 11 long holes.
4a, 114b and the switch operating plate 11
4 is slidably guided relative to the guide base 100. Furthermore, bent portions 114c and 114d are provided at both ends of the switch actuation plate 114.
The bent portion 114c is the motor rotation selector switch 1
The bent portion 114d extends to a height such that it can engage with the bent portion 24e of the cassette transfer member 24. When the cassette loading is completed, the bent portion 24e of the cassette transfer member 24 is connected to the switch 1.
By engaging and pushing the twelve levers 112a, the levers 112a are moved in the direction A shown in the figure, and the switch 112 is switched. At this time, the lever 112a and the bent portion 114c of the switch actuating plate 114 are engaged to simultaneously move the switch actuating plate 114 in the direction A shown in the figure. When the cassette ejection is completed, the bent portion 2 of the cassette transfer member 24
4e is a bent portion 114 of the switch operating plate 114;
d to move the switch operating plate 114 in the direction B shown in the figure. At the same time, since the bent portion 114c is engaged with the lever 112a of the switch 112, the lever 112a is also moved in the direction B shown to switch the switch 112. Here, the cassette transfer member 124, the switch operating plate 114, the lever 11
2a constitutes an electrical contact switching mechanism.

FIG. 9 shows the circuit configuration of the motor drive. The actuator 130 of the switch 112 is at the position indicated by the solid line in the figure while waiting for the cassette to be inserted, and this position is the electrical contact for switching the circuit connection of the switch 112. This will be the first position. When the cassette is inserted and the switch 108 is activated, the motor 6 is energized and rotates in the forward direction, thereby performing the cassette mounting operation. When the cassette mounting operation is completed, the switch 112 is switched as described above, but at this time, the actuator 130 moves to the position indicated by the dashed line in the figure, cutting off the current to the motor 6 and supplying power to the microcomputer 134. Insert. The position indicated by the one-dot chain line is the second position of the switch 112. Further, the switch 110 is also activated when the cassette installation is completed and is in the open state. The transistor 132 conducts current when activated by the microcomputer 134, but
Normally the current is cut off. The cassette is ejected by pressing an eject switch (not shown), and at this time, the microcomputer 134 operates the transistor 132 and the motor 6 is energized to start reversing. When the ejection is completed, the switch 112 is changed and the actuator 130 moves to the position shown by the solid line in the figure, returning to the cassette insertion standby state.

The above is an overview of this device. Next, the operation of this device will be explained.

Figure 2 is a plan view of the cassette when it is waiting for insertion.
At this time, the lifters 74 and 80 are in positions for guiding the horizontal movement of the cassette, as shown in FIG. 8a. Further, the cassette holding arm 54 is attached to the cam groove 44 of the control plate 38 as shown by the dashed line in FIG. 6a.
The cassette is rotated upward by the rollers 56 to enable horizontal movement of the cassette. At this time, as described above, the guide shaft 58 is fitted into the step portion 36b of the elongated hole 36 of the guide plate 30, and the control plate 38 is in a locked state, so that the control plate 38 and the gear
Lifter 74 and lifter 80 connected by cam etc.
The cassette holding arm 54 is also locked and does not rotate, and each maintains a position that allows horizontal movement of the cassette. In the conventional method in which the lifter is biased by a spring to a position that allows the cassette to move horizontally, if the cassette is inserted at an angle, the lifter is pushed by the cassette and moves against the biasing force of the spring. It rotates,
The cassette was in abutment against the reel stand or the capstan, but in this device the lifter maintains a position that allows the cassette to move horizontally, so it can reliably guide the insertion of the cassette.

In FIGS. 1 and 2, when the cassette is inserted through the front opening 200 and pushed in while being guided by the lifters 74 and 80, the rising portion 100b of the guide base 100, and the cassette guide 50, the end of the cassette is inserted into the cassette. comes into contact with the insertion detection arm 106,
Rotate the cassette insertion detection arm 106 clockwise against the counterclockwise urging force, and switch 10
Activate 8. As a result of this operation of the switch 108, the switch 108 becomes the position shown by the broken line in FIG. 9, and the circuit is connected to the motor 6.
rotates in the forward direction. Due to the rotation of this motor 6, the cassette transfer member 24 is transferred via a belt, gears, etc.
starts moving in the direction A shown in FIG. As a result of this movement, the hooking pawl 90a of the cassette hooking member 90 is fitted into the pinch roller insertion hole of the cassette to hold the cassette. From this state, the cassette is held by the hook 90a of the cassette hook member 90 and is horizontally transported in the direction A in the figure.

FIGS. 3, 6b, and 7b are diagrams showing the completed state of horizontal transfer of the cassette. At this time, the control plate 38 is still locked. When the cassette transfer member 24 continues to move in the direction A in the figure, the shaft 92 implanted in the cassette hooking member 90 engages with the inclined cam portion 102a of the cam groove 102 provided in the guide base 100. Then, the cassette hooking member 90 rotates clockwise against the biasing force, and the hooking pawl 90a separates from the pinch roller insertion hole of the cassette. Further, as the shaft 92 moves to the flat portion 102b of the cam groove 102, the cassette hooking member 90 is maintained in a detached state from the pinch roller insertion hole. Here, the hooking pawl 90a is removed from the pinch roller insertion hole so that it does not interfere with the vertical movement of the cassette. On the other hand, at the same time as the hooking member 90 rotates, the cam portion 26c of the slide plate 26 pushes the guide shaft 58 to move it along the step portion 36b of the elongated hole 36, and the guide shaft 58 is separated from the step portion 36b. Unlock the control board 38. For this reason, the control board 3
8 is the cam portion 26c of the slide plate 26 and the guide shaft 5
8. Power is transmitted through the elongated hole 42, and the cassette transfer member 24 starts moving in the direction A in the figure. When the control plate 38 starts moving, the rack 4
6, gear 64, rack 6 of cassette lifting member 66
6a, the cassette lifting member 66 is moved in the direction C in the figure, and the cam groove 72 provided in the cassette lifting member 66 shown in FIG. let As the lifter 74 rotates, the lifter 78 is also rotated by the gears 78 and 82 to lower the cassette while keeping it parallel to the substrate 2. Furthermore, as the control plate 38 moves, the roller 56 of the cassette holding arm 54 moves along the cam groove 44 provided in the control plate 38, causing the cassette holding arm 54 to rotate and the upper surface of the cassette to be pressed by the spring 60. guide you,
Further, when the cassette is completely installed, the upper surface of the cassette is pressed to securely hold the cassette.

On the other hand, the bent portion 24 of the cassette transfer member 24
f presses the switch 110 to open the switch 110, and the bent portion 24e of the cassette transfer member 24 presses the lever 112a of the motor rotation changeover switch 112 to move it in the direction A shown in the figure. As the lever 112a of the switch 112 is moved in the direction A in the figure, the actuator 130 of the switch 112 is moved from the position indicated by the solid line to the position indicated by the dashed line in the figure in FIG. 9, and the current to the motor 6 is cut off. Motor 6 stops. Further, at this time, the actuator 130 of the switch 112 is in the position shown by the dashed line in the figure, so the circuit is connected so that the current to the motor 6 is in the opposite phase to that when the cassette is installed. However, since transistor 132 is not operating and switch 110 is in an open state, no current flows to motor 6. At the same time, power is turned on to the microcomputer 134 to enable the microcomputer 134 to operate. As described above, the loading of the cassette is completed by the operation of the switch 112, and the state at this time is shown in FIGS. 4, 6c, and 8b. Note that the installed state of the cassette is warm 12a.
It is held by the meshing of the worm wheel 16a and the worm wheel 16a.

The cassette loading operation has been described above, and the cassette ejection operation will now be described. The cassette is ejected by activating an ejection switch (not shown), etc., and the transistor 132 is activated by a command from the microcomputer 134, causing current to flow to the motor 6 in the opposite direction to that when the cassette is installed, and the motor 6 is reversed. Start. By reversing the motor 6, an operation opposite to the above-described cassette mounting operation is performed and the cassette is ejected. That is, as the motor 6 rotates, the cassette transfer member 24 begins to move from the state shown in FIG. 4 in the direction B in the drawing, and the switch 110 is first closed. After switch 110 is closed, switch 110 maintains the motor circuit even if transistor 132 is turned off. Therefore, transistor 132 only needs to be turned on at the beginning of evacuation. Further, instead of the transistor 132, a configuration may be adopted in which a push switch that can be operated by the user closes the circuit. On the other hand, the slide plate 26 is also shown in FIG.
5c and 6c, the inclined cam portion 26b of the slide plate 36 moves toward the guide shaft 5.
By pressing 8, power is transmitted to the control plate 38, and the control plate 38 also moves in the direction B in the figure. As the control plate 38 moves, the cassette lifting member 66 is moved in the direction D in the figure with power transmitted through the gears and racks, and the cam groove 72 of the cassette lifting member 66 is moved.
The vertical portion 72a of is in contact with the shaft 76 of the lifter 74,
When the cassette lifting member 66 further moves, the shaft 76
is pushed by the vertical portion 72a of the cam 72 and the lifter 74
rotates around the shaft 68. At this time, the shaft 76
moves along the vertical portion 72a of the cam 72 to the position shown in FIG. 8a. The lifter 8 is rotated by the rotation of the lifter 74.
0 rotates in the opposite direction, and the cassette is supported by the lifters 74 and 80 on its lower surface and begins to rise.

In addition, as the control plate 38 moves, the roller 56 provided on the cassette holding member 54 moves within the cam groove 44 of the control plate 38, causing the cassette holding member 54 to rotate upward and press the cassette into the cassette. The pressure is released. When the cassette reaches the end of its vertical movement, the shaft 92 of the cassette hooking member 90 comes to oppose the inclined portion 102a of the cam groove 102 provided in the guide base 100 due to the movement of the cassette transfer member 24, and the cassette The counterclockwise biasing force applied to the hook member 90 causes the cassette hook member 9 to
0 rotates counterclockwise, and the catch claw 90a is fitted into the pinch roller insertion hole of the cassette to hold the cassette. On the other hand, when the vertical movement of the cassette is completed, as shown in FIG. portion 36b, and further comes to face the horizontal cam portion 26a of the slide plate 26 to lock the control plate 38. Therefore, the lifters 74, 80 and the cassette holding arm 54 are maintained at positions that allow horizontal movement of the cassette.

FIG. 3 is a diagram showing the completion of the vertical movement of the cassette when the cassette is ejected, and is in the same state as the diagram showing the completion of the horizontal movement of the cassette when the cassette is loaded. However, the switch 112 and the switch actuating plate 114 are located at the positions indicated by the dashed line in the figure. Horizontal transfer of the cassette starts from this state, but as the cassette moves, the cassette insertion detection arm 106 rotates while contacting the rear surface of the cassette due to the counterclockwise biasing force, and the switch 108
to be established. The cassette transfer member 24 further moves to eject the cassette from the front opening of the device, but when the cassette ejection is completed, the bent portion 24e of the cassette transfer member 24 pushes the rising portion 114d of the switch operating plate 114, and the switch is activated. The actuating plate 114 is moved in the direction B shown in the figure. As a result, the rising portion 11 of the switch actuating plate 114
4c moves the lever 112a of the switch 112 to change the switch 112. switch 112
As the lever 112a moves, the actuator 130 of the switch 112 in FIG. 9 moves from the position indicated by the dashed line to the position indicated by the solid line, and the current to the motor 6 is cut off, causing the motor 6 to stop. At the same time, a circuit is connected so that the current to the motor 6 flows in the forward rotation direction of the motor, and the current to the microcomputer 134 is also cut off at the same time. However, since the switch 108 is already in the open state at this time, the motor 6
No current flows to. The cassette is ejected as described above, and the cassette is placed in a standby state as shown in FIG.

Next, a case will be described with reference to FIG. 9 in which the power to the apparatus is cut off for some reason during the loading or unloading operation of a cassette, and then the power is turned on again. When loading a cassette, once the cassette is inserted and the cassette transfer starts, the cassette insertion detection switch 108 is maintained in the closed state by the rotation of the cassette insertion detection arm 106, so the power is cut off, and then the power is turned off. Even if it is inserted, the mounting operation continues again without any hindrance. On the other hand, if the power is cut off when the cassette is ejected, the microcomputer 134 is reset and returns to the initial position of the program, and even when the power is turned on again, it does not remember the previous state and the transistor 132 does not operate. . For this reason, this apparatus is provided with a switch 110 to maintain the ejected state of the cassette. As mentioned before, the switch 110 is closed immediately after the discharge operation starts, so even if the transistor 132 is not activated when the power is turned on after being turned off, the current flows through the switch 110 to the motor 6. is supplied to continue the discharge state. Furthermore, if the power is cut off before the switch 110 is closed, the cassette has not yet been moved and is still in the installed state, so it is set to move to the playing state. By providing the switch 110 in this way, even if the microcomputer is reset, the cassette ejection state can be maintained, and the cassette can be transferred without malfunction.

As described above, according to the present invention, the switching between the cassette loading and unloading operations is performed by reversing the motor in the forward direction, and furthermore, the switching of the rotational direction of the motor is linked to the cassette loading and unloading operations. This is done by switching the electrical contacts, which simplifies the motor drive control circuit and increases motor usage efficiency.
It is possible to provide a tape cassette mounting device that is inexpensive and highly reliable.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a cassette loading device according to an embodiment of the present invention, Fig. 2 is a plan view of the same device when the cassette is waiting for insertion, and Fig. 3 is a plan view of the same device when the horizontal transfer of the cassette is completed. , FIG. 4 is a plan view of the device when the cassette has been installed,
Fig. 5 is an exploded perspective view of the same essential parts, Fig. 6 is a side view of the same device, Fig. 7 is an enlarged view of the main parts, Fig. 8 is a rear view of the same device, and Fig. 9 is a motor control circuit of the same device. FIG. 2... Board, 6... Cassette transfer motor, 24
...Cassette transfer member, 26...Slide plate, 3
0...Guide plate, 38...Control board, 50...Cassette guide, 54...Cassette holding member, 58...
...Guide shaft, 66...Cassette lifting member, 74, 8
0...Lifter, 90...Cassette hooking member, 10
0...Guide base, 106...Cassette insertion detection arm, 108...Cassette insertion detection switch, 1
10... Switch for maintaining the cassette ejection state, 11
2...Motor rotation selection switch, 114...Switch operating plate.

Claims (1)

[Claims] 1. a motor capable of forward and reverse rotation, and a tape cassette transfer mechanism configured to perform an operation of mounting a tape cassette in a predetermined position of the apparatus when the motor rotates in the normal direction and an operation of ejecting the tape cassette when the motor reverses; a first electrical contact connected to the motor such that in a first position the circuit connection is such that the motor is driven in the forward direction and in a second position the circuit connection is such that the motor is driven in the reverse direction; a second electrical contact connected to the first electrical contact and configured to cut off current when the tape cassette has been completely loaded; A third electrical contact is configured to cut off the current and conduct electricity when the tape cassette is inserted into the device, and the third electrical contact is configured to cut off the tape cassette and energize it when the tape cassette is inserted into the device. The first electrical contact is moved from the second position to the first position by the operation of displacing the first electrical contact from the first position to the second position and bringing the tape cassette to a completed ejection state. Equipped with an electric contact switching mechanism that operates to displace the
A tape cassette mounting device characterized in that the tape cassette transport direction is switched by the functions of the first electrical contact, the second electrical contact, and the third electrical contact.