JPH0252338B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cassette loading device.

Structure of a conventional example and its problems A conventional cassette mounting device will be explained with reference to FIGS. 1 to 4. FIG. 1 is a perspective view, and FIGS. 2 to 4 are explanatory diagrams of the operation of the lock mechanism.

In FIGS. 1 to 4, reference numeral 1 denotes a cassette holder, which is a mounting member for storing a cassette (not shown) loaded with magnetic tape, etc., and for moving the cassette to a cassette up position and a cassette down position. . Reference numeral 2 designates a cassette holder lid fixed to the cassette holder 1. Reference numerals 3 and 4 denote presser levers for holding down the cassette, which are rotatably supported by the cassette holder 1 and configured to press and fix the cassette with springs or the like (not shown). 5 is a sub-arm, and 6 is a holder support, one end of which is rotatably supported by the cassette holder 1, and the other end rotatably supported by a stand 7. The stand 7 is fixed to a substrate 8 such as an aluminum chassis with screws or the like. Reference numeral 9 designates a lock pin which is hung on a cassette holder spring 10 which has one end fixed to the holder support 6 and the other end attached to the stand 7. The other end of the cassette holder spring 10 is hung on a stand 7. A lock roller 11 is rotatably supported on the outer periphery of the lock pin 9. 13 is a lock lever pin implanted in the lock lever 12. Reference numeral 14 denotes a lock release pin installed in the lock lever 12.
Reference numeral 15 designates an unlocking spring which has one end hung on the unlocking pin 14 and the other end hung on the stand 7. The lock lever 12 is configured to rotate around a lock stand pin 16 installed in the stand 7 as a fulcrum.

A release action lever 17 is rotatably supported by an action pin 18 fixed to the stand 7. 19 is an up detection switch which is switched by the rotation of an up detection lever 21 rotatably supported by a pin 20, and 22 is a down detection switch which is switched by rotation of a down detection lever 24 which is rotatably supported by a pin 23. It's a switch. The down detection lever 24 is biased counterclockwise by a spring 25 (not shown), one end of which is hung on the stand 7.

Next, the operation of this device will be explained. As shown in FIGS. 1 and 2, when the cassette holder 1 is in the cassette up position (position where a cassette can be inserted into the cassette holder 1), the up detection lever 21 is rotated counterclockwise by the lock pin 9. Then, switch 19 is turned on, and spring 25 is turned on.
As a result, the down detection lever 24 is rotated counterclockwise, and the switch 22 is turned on. As the cassette is inserted into the cassette holder 1 at this cassette position and the cassette holder lid 2 is pushed down, the cassette holder 1, sub-arm 5 and holder support 6 descend with the stand 7 as a fulcrum, and the holder support 6 The lock pin 9 and the lock roller 11 supported by the lock pin 9 and the lock roller 11 both descend in the direction of the arrow A as shown in FIG. Therefore, the up detection lever 21 is rotated clockwise by the elasticity of the movable contact piece of the switch 19, and the switch 19 is turned off. As the lock pin 9 descends in the direction of arrow A, the guide portion 12A of the lock lever 12 is pushed by the lock roller 11 and moves in the direction of arrow B. For this reason, the lock lever pin 13 embedded in the lock lever 12
moves in the direction of arrow B, and the down detection lever 24
The switch 22 is turned OFF in order to press the protrusion in the direction of arrow B against the spring 25 and rotate the down detection lever 24 clockwise.

Further, when the cassette holder 1 is pressed down and lowered, the lock roller 11 moves over the guide part 12A of the lock lever 12 to the lock fixing part 12B of the lock lever 12, and moves the cassette holder 1 to the cassette loading position (as shown in FIG. 4). cassette down position). At this time, lock lever 12
Since the lock lever pin 13 is biased by the lock release spring 15, the lock lever pin 13 moves in the direction of the arrow C.
This causes the down detection lever 24 to rotate counterclockwise, turning the switch 22 ON again. In addition,
At this time, the switch 19 is kept in the OFF state.

In addition, when raising the cassette holder 1 from the cassette down position to the cassette up position, the release action lever 17 rotatably supported by a pin 18 implanted in the base plate 8 is brought into contact with the lock release kick pin 14. By making contact and rotating counterclockwise, the lock lever 12 rotates clockwise, the locking force by the lock release spring 15 is released, and the locked state of the lock roller 11 fixed to the lock fixing part 12B is released. The rock roller 11 moves in the direction of the arrow H, and the cassette holder 1 rises to the cassette up position. By releasing the lock in this way, the lock roller 11
During the short time that the
However, when the rock roller 11 reaches the cassette up position, the down detection lever 2
4 turns the switch 22 ON again and holds it there.
When the lock roller 11 reaches the cassette up position, the up detection lever 21 rotates and the switch 19 is turned on again. Repeat the same operation below.

In the cassette loading device configured in this way,
Since the positions of the lock lever 12 at the cassette up position and the cassette down position are the same, it is impossible to distinguish between the cassette up position and the cassette down position. , switch 19 was required.

OBJECTS OF THE INVENTION The present invention eliminates the pin, up detection lever, and switch, and aims to provide a cassette loading device that can distinguish between the cassette up position and the cassette down position with a simple configuration. .

Structure of the Invention In order to achieve the above object, the present invention includes a cassette up/down mechanism section that moves the cassette holder up and down between a cassette up position and a cassette down position;
A lock member is provided in the cassette up-and-down mechanism section and moves in conjunction with the up and down movement of the cassette holder, and a lock member is rotatably held on a board while being biased in a direction to prevent movement of the lock member, and the lock member is a guide part that comes into contact with the lock member when the holder is in the cassette up position and when the holder is lowered from the cassette up position; The lock lever includes a lock lever having a fixed part that abuts the member, and a down detection lever that is interlocked with the lock lever to operate a down detection switch when the cassette holder is in the cassette down position, and the lock lever is in the cassette up position where the lock member abuts the guide part. Lock lever position and
The lock lever position is different from the cassette-down position where the locking member abuts the fixing part, thereby making it possible to distinguish between the cassette-up position and the cassette-down position with a simple configuration.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on the drawings. 5 and 6 are explanatory views of the operation of the locking mechanism of a cassette loading device according to an embodiment of the present invention, with FIG. 5 showing the cassette up position and FIG. 6 showing the cassette down position. 1 to 11, 13 in the figure
18, 22 to 25 are similar to those having the same numbers shown in FIGS. 1 to 4, and have the same structure. 26 is a lock lever, and this lock lever 26 is in contact with the lock roller 11 even in the cassette up position.

Next, the operation of the cassette device of this device will be explained. When the cassette holder 1 is in the cassette up position as shown in Fig. 5, the cassette holder spring 1
The lock lever 26 is in a state where it is slightly rotated clockwise by the lock roller 11 which is biased by the lock lever 26. Therefore, the down detection lever 24 is also rotated clockwise, and the switch 22 is turned off.

Insert the cassette into the cassette holder 1 at this cassette up position, and as you push down the cassette holder lid 2, the cassette holder 1,
The sub-arm 5 and the holder support 6 descend using the stand 7 as a fulcrum, and the lock pin 9 and the lock roller 11 supported by the holder support 6 both descend in the direction of arrow A as shown in FIG. As the lock pin 9 descends in the direction of arrow A, the guide portion 26 of the lock lever 26
A is further pushed by the rock roller 11 and moves in the direction of arrow B. Therefore, the lock lever pin 13 installed in the lock lever 26 moves in the direction of the arrow B, and the protruding piece of the down detection lever 24 is moved by the spring 2.
5 in the direction of arrow B to further rotate the down detection lever 24 clockwise.

Further, when the cassette holder 1 is pressed down and lowered, the lock roller 11 moves over the guide part 26A of the lock lever 26 to the lock fixing part 26B of the lock lever 26, and moves the cassette holder 1 to the cassette mounting position (as shown in FIG. cassette down position). At this time, the lock lever 26
Since the lock lever pin 13 is biased by the lock release spring 15, the lock lever pin 13 moves in the direction of the arrow C.
This causes the down detection lever 24 to rotate counterclockwise and turn on the switch 22.

In addition, when raising the cassette holder 1 from the cassette down position to the cassette up position, the release action lever 17 rotatably supported by a pin 18 implanted in the base plate 8 is pressed against the lock release kick pin 14. By touching the lock lever 26 and rotating it counterclockwise, the lock lever 26 rotates clockwise, the locking force by the lock release spring 15 is released, and the lock roller 11 fixed to the fixed part 26B is released.
The lock state of the lock crawler 1 is released.
1 moves in the direction of the arrow H, and the cassette holder 1 rises to the cassette up position. By releasing the lock in this manner, the switch 22 is turned OFF by the down detection lever 24 in a short period of time, and remains OFF until the lock roller 11 reaches the cassette up position. Repeat the same operation below.

Effects of the Invention As described above, according to the present invention, by simply extending the lock lever of a conventional cassette loading device, the lock member can be brought into contact with the guide portion of the lock lever even in the cassette up position, and the cassette can be placed in the cassette up position. The lock lever positions for the cassette down positions are different, and the down detection switch can be turned on at the cassette down position and turned off at the cassette up position via the down detection lever, thereby distinguishing between the cassette up position and the cassette down position. Can be done. Therefore, the detection member for detecting the cassette up position, which was conventionally necessary, can be eliminated, and the entire device can be made smaller and lighter.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a conventional cassette loading device, FIGS. 2 to 4 are explanatory diagrams of the operation of the locking mechanism of the same device, and FIGS. 5 to 6 are cassette loading devices according to an embodiment of the present invention. FIG. 3 is an explanatory diagram of the operation of the locking mechanism section of FIG. 1...Cassette holder, 10...Cassette holder spring, 11...Lock roller, 13...Lock lever pin, 14...Lock release lock pin, 1
5... Lock release spring, 22... Down detection switch, 24... Down detection lever, 26... Lock lever.

Claims (1)

[Claims] 1 a cassette up/down mechanism for moving the cassette holder up and down between a cassette up position and a cassette down position;
a lock member that moves in conjunction with the vertical movement of the cassette holder; a lock member that is rotatably held on a base plate while being biased in a direction to prevent movement of the lock member; and a lock member that moves in conjunction with the vertical movement of the cassette holder; a lock lever having a guide part that comes into contact with the lock member when the cassette holder is lowered from the cassette, and a fixed part that comes into contact with the lock member when the lock member moves beyond the guide part and the cassette holder is lowered to the cassette down position; and a down detection lever that is interlocked with the lock lever and operates a down detection switch when the cassette holder is in the cassette down position, and the lock lever is in the cassette up position where the lock member abuts the guide part and the lock member is in the fixed part. A cassette mounting device configured such that the lock lever position is different from the cassette down position in contact with the lock lever.