JPH0258703B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a cassette tape loading device that automatically loads a cassette tape, and particularly to a cassette tape loading device that quickly discharges a cassette tape in the event of an abnormal operation, thereby improving the performance of a cassette tape recorder or the like. This is to prevent damage to the device.

Conventional Structure and Problems Conventional cassette tape loading devices have been known in which, when a cassette tape is inserted into an insertion window, a motor automatically moves it to a position where the tape can travel and is loaded. There is. In this conventional device, if a moving cassette tape gets caught in the middle and stops, the load on the loading motor becomes abnormally large, causing a temperature rise or failure. Furthermore, there have been cases where the cassette tape becomes stuck in the middle, making it impossible to insert or remove it, and eventually requiring the entire device to be disassembled. One of the major causes of the above-mentioned cassette tape becoming stuck in the middle is the operational error of inserting the cassette tape in the wrong direction. Reverse insertion refers to insertion in a direction in which the exposed side of the cassette tape does not face the head of the device. In order to prevent this reverse insertion, many devices focus on the asymmetry of the cross-sectional shape of the cassette tape, and make the insertion window the same shape as the asymmetric shape described above, so that if the cassette tape is in the opposite direction, it will not fit into the insertion window. It was devised so that it would be impossible to insert the However, if the size of the insertion window is larger than the cross-sectional size of the cassette tape, the insertion operation becomes difficult, so a certain clearance is required. In other words, the smaller the cassette tape, the more precisely the clearance described above must be formed, and even with such a highly precise configuration, the operability of inserting the cassette tape is very poor, and the cassette tape may slide on the surface. New drawbacks have arisen, such as scratches often occurring due to abrasion, and furthermore, manufacturing costs are high.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned drawbacks of the conventional apparatus, and an object of the present invention is to promptly eject the cassette tape in the event of an abnormal operation, thereby preventing damage to the apparatus.

Structure of the Invention In order to achieve the above object, the cassette tape loading device of the present invention loads the cassette tape from the first position of the cassette tape insertion window to the second position where the tape can travel, and from the second position to the first position. a cam for moving the moving means from the first position to the second position and back to the first position in one revolution; and locking the cam in the second position. The cassette tape is provided with a locking means and a switch that operates in the second position, and when the switch is operated after inserting the cassette tape, the locking means stops the operation of the cam and holds the cassette tape in the second position. However, if the cassette tape does not come to the second position due to reverse insertion or the like, the locking means does not work and the cam continues to rotate and the moving means moves the cassette tape. This is to return it to the first position.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a cassette tape, and in FIG. 1, this cassette tape 1 is in a first position after being ejected from the apparatus. At this position, the hub hole of the cassette tape 1 and the cassette holding portion 12 are fitted. 2 is a first switch that operates when the cassette tape 1 is in the first position. 3 is a motor, and this motor 3 transmits torque to a relay gear 5 through a belt 4, and the relay gear 5 further transmits torque to a worm gear 6.
The torque is transmitted to the worm wheel 7 via the worm wheel 7. The worm wheel 7 is connected to the intermittent gear portion 8d of the cam 8 through this gear portion. The cam 8 includes the intermittent gear portion 8d, the lock cam portion 8c, the horizontally moving cam portion 8b, and the vertically moving cam portion 8.
It is composed of a. The lock cam portion 8c is adapted to be locked by a lock arm 16, and the lock arm 16 is connected to the solenoid 15. Further, the horizontal movement cam portion 8b contacts the pin 9a of the first slide angle 9, thereby moving the first slide angle 9 in the direction shown by the arrow A in FIG.
Move in direction B. First slide angle 9
is connected to the pin 10a of the transfer arm 10. The transfer arm 10, which rotates around the shaft 10b, has a second slide angle 1 with a pin 10c.
1 and further a second slide angle 11
The cassette holding part 12 having spring properties is attached to the screw 1.
2a. Further, the second slide angle 11 moves along the groove 19a of the guide angle 19 by means of pins 11a and 11b. The vertically moving cam portion 8a contacts the pin 13a of the third slide angle 13 to control the movement of this angle 13. The third slide angle 13 moves along pins 18a, 18b fixed to the side branch 18 and controls the movement of a pin 22a attached to the holder retaining plate 22. The holder holding plate 22 is urged clockwise by a vertical movement spring 25 with the shaft 22b as a fulcrum, and is engaged with the bent portion 21c of the cassette holder 21. Pins 21a and 21b attached to the cassette holder 21 are fitted into guide portions 18c and 18d provided on the side plate 18. The cassette holder 21 is also configured to abut a second switch 24 and operate the second switch 24. The spring 17 serves to bias the transfer arm 10 in the direction of arrow A in FIG. 1, and also to press the second slide angle 11 in the direction A at the first position, thereby turning off the first switch 2.

FIG. 7 shows a block diagram of the control circuit. The first switch 2 and the second switch 24 are input to a control section 23, and control signals are output to the motor 3 and solenoid 15. Also, Figure 8,
FIG. 9 shows the relationship with the reel stand when the cassette tape 1 is inserted normally and when it is inserted backwards.

Next, the operation will be explained. First, the case where the cassette tape 1 is inserted in the forward direction will be explained.
In FIG. 1, when the cassette tape 1 is pressed, the second slide angle 11 moves in the direction of arrow B, and the first switch 2, which had been turned off by the pin 11a, is turned on, and power is supplied to the motor 3. Motor 3 starts rotating. At the same time, the solenoid 15 operates and the lock arm 16 separates from the lock cam portion 8c. When the motor 3 rotates, its rotational torque is transmitted to the intermittent gear portion 8d of the cam 8 via the belt 4, relay gear 5, worm gear 6, and worm wheel 7, causing the cam 8 to rotate.
As the cam 8 rotates, the lock cam section 8c, the horizontally moving cam section 8b, and the vertically moving cam section 8a start rotating at the same time. The horizontal movement cam part 8b moves the first slide angle 9 in the direction of arrow A via the pin 9a, and the transfer arm 10 is moved by the first slide angle 9 via the pin 10a, and the second slide angle 11 is pin 1 of transfer arm 10
0c in the direction of arrow B. Therefore, the cassette tape 1 is moved in the direction of arrow B by the cassette holding section 12. Further, the third slide angle 13, which is biased in the direction of arrow B by the spring 14 due to the rotation of the vertically movable cam portion 8a, is connected to the pin 1.
3a in the direction of arrow B.
When the cam 8 rotates approximately half a turn, the loading mechanism becomes as shown in FIG. FIG. 3 shows a state in which the cassette tape 1 is installed so that the tape can run.
In this state, as shown in FIG. 4, the lock cam portion 8c of the cam 8 is in a locked state by the lock arm 16 [because the solenoid 15 stops suctioning when the second switch 24, which will be described later, is turned on]. Further, the connection with the worm wheel 7 is separated at the intermittent gear portion 8d. Therefore, in this state, the worm wheel 7 is rotating, but the rotation of the cam 8 is stopped. On the other hand, due to the shape of the opening of the third slide angle 13 and the vertical movement spring 25, the pin 22a of the holder holding plate 22 moves downward, and the cassette tape 1 contained in the cassette holder 21 comes out from the mechanical board 20. It fits into the reel stands 20a and 20b. In this state, the second switch 24 is in the on state. This second
When switch 24 is turned on, solenoid 1
5 is cut off, and a solenoid (not shown) for running the tape is sucked to bring the tape into a running state. Next, the operation when the cassette tape 1 is ejected from this cassette tape mounted state will be explained. When ejecting the cassette tape 1, the control section 23 shown in FIG.
This causes the solenoid 15 to be sucked, and the lock cam portion 8c and the lock arm 16 are disengaged from each other. When the cam 8 is unlocked (not shown), a spring that rotates the cam a little works to reconnect the intermittent gear section 8d and the worm wheel 7, and the vertically moving cam section 8a and the horizontally moving cam section 8b start rotating. The movement of these cams causes the holder holding plate 22 to be operated by the third slide angle 13 in the same manner as described above, and the cassette holder 21 is raised upward, and the first slide angle 9, transfer arm 10, and second slide are moved upward. By the operation of the angle 11, the cassette tape 1 is moved in the direction of arrow B, and the cassette tape 1 is moved in the ejection direction. When the second slide angle 11 moves in the direction of arrow B and the first switch 2 is turned off, the motor 3 stops rotating and the cassette tape 1 stops at the ejection position as shown in FIG.

Before explaining the operation of the loading mechanism when the cassette tape 1 is inserted in the opposite direction, the relationship between the cassette tape 1 and the reel stands 20a, 20b will be explained with reference to FIGS. 8 and 9. FIG. 8 shows the state at the time of normal insertion, and FIG. 9 shows the state at the time of reverse insertion. In the figure, 1a and 1b are cassette hub holes, and the positions of these holes are l ₁ from the tape exposed side and l ₂ from the opposite side, so that l ₁ >l _2.Using this difference, cassette tape 1 is Reverse insertion can be detected and ejected. When the cassette tape 1 is moved in the direction of the arrow A by the loading mechanism,
If the cassette tape 1 is in the correct direction as shown in FIGS. 24a is pressed, and an on signal is input to the control section 23. On the other hand, when the cassette tape 1 is inserted in the opposite direction as shown in FIG. 9, when it is moved in the direction of the arrow A by the loading mechanism section, the l ₁ > ₂ , the cassette hub holes 1b, 1a are connected to the reel stands 20a, 20.
As is clear from FIG. 9D, the cassette tape 1 remains on the reel stands 20a and 20b, and the second switch 24 is not turned on. In addition, in order to mechanically judge the reverse insertion of the cassette tape 1, the cassette hub hole 1
Although the asymmetry in the positions of a and 1b is utilized, this is not the only method, and other shapes may also be used.
When the cassette tape 1 is reversely inserted as described above, at first it moves in the same way as when it is normally inserted, but when the cam 8 rotates about half a turn, the cassette holder 21 moves to the reel stand as shown in FIG. 20a,
20b and does not move downward, the second switch 24 does not turn on. And the solenoid 15 continues to be sucked. Therefore, the lock arm 16 is not engaged with the lock cam portion 8c, so
The cam 8 continues to rotate, the loading mechanism performs the same operation as ejecting the cassette tape, and finally the cassette tape 1 stops at the position shown in FIG. Therefore, when the cassette tape is inserted backwards, the cam 8 rotates once and the tape is automatically ejected again.

Effects of the Invention As described above, according to the present invention, the switch detects only when the cassette tape is inserted normally;
By stopping the rotation of the cam of the loading mechanism at the cassette tape mounting position, the cassette tape can be quickly ejected when the cassette tape is inserted backwards. In particular, according to the present invention, when the cassette tape is reversely inserted, the switch does not operate, and this can be detected and the cassette tape can be ejected, thereby preventing abnormal loads from being applied to the motor and loading mechanism that operate during loading. ,
It is possible to prevent equipment failure due to this. Therefore, there is no need to configure the cassette insertion window with excessive precision in order to prevent reverse insertion of the cassette tape, and a relatively large opening can be provided, which prevents scratches on the cassette tape and improves operability. This has the excellent effect of being able to measure the improvement of

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a plan view of the loading device when the cassette tape is in the first position, FIG. 2 is a side view of the same, and FIG.
The figure shows a plan view of the loading device when the cassette tape is in the second position, FIG. 4 is a side view of the loading device, FIG. 5 is a longitudinal cross-sectional view of the loading device, and FIG. 6 shows the state when the cassette tape is reversely inserted. 7 is a block diagram of the control circuit, and FIGS. 8 and 9 are explanatory diagrams showing the relationship between the cassette tape and the reel stand during normal insertion and reverse insertion, respectively. 1...Cassette tape, 1a, 1b...Hub hole, 2
...first switch, 3...motor, 8...cam, 9...
First slide angle, 10...transfer arm, 1
DESCRIPTION OF SYMBOLS 1...Second slide angle, 12...Cassette holding part, 13...Third slide angle, 15...Solenoid, 16...Lock arm, 21...Cassette holder, 20...Second switch.

Claims (1)

[Claims] 1 a moving means for moving the cassette tape from a first position of the cassette tape insertion window to a second position where the tape can run, and from the second position to the first position; a cam for moving the cam from the first position to the second position and back to the first position; locking means for locking the cam in the second position; and a switch operating in the second position; When the switch is operated after the cassette tape is inserted, the locking means stops the operation of the cam and holds the cassette tape in the second position. If not, the cassette tape loading device is configured such that the locking means does not act, the cam continues to rotate, and the moving means returns the cassette tape to the first position.