JPH0332150B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a cassette ejecting device, and more particularly to a cassette ejecting device equipped with a lever for ejecting a cassette that is biased by a spring.

Prior Art Devices such as tape recorders, video tape recorders, magnetic disk (floppy disk) devices, etc. that have a cassette attached thereto are often equipped with a spring-loaded lever for ejecting the cassette. .

As a cassette ejecting device having such a structure, for example, a conventional structure of a magnetic disk device is shown in FIG.

In FIG. 1, reference numeral 1 denotes a cassette guide having a flat U-shape in cross section, by which a magnetic disk cassette 2 is guided.

A cassette ejection lever 3 is slidably stacked on the upper surface of the cassette guide 1.

This cassette ejection lever 3 has two elongated guide holes 3a and 3b, and guide pins 4 and 5 protruding from the cassette guide 1 are inserted into these guide holes.
are slidably fitted to each other. Washers 6 are fixed to the guide pins 4 and 5 by C rings 7 to prevent the cassette ejection lever 3 from falling off.

On the other hand, the protrusion 8 cut and raised from the upper surface of the cassette guide 1 and the guide hole 3 of the cassette ejection lever 3
A spring 10 is stretched between a protruding piece 9 protruding from the protruding piece 8 at the inner end in the cassette mounting direction on the b side, that is, at a position facing the protruding piece 8. This gives them the habit of moving in the direction of ejection.

Further, a stopper 11 is provided at the end of the cassette ejection lever 3, that is, at the inner end in the direction of insertion of the cassette, projecting downward and at right angles. This stopper 11 is located at a position where it can be fitted into an elongated notch 1a formed on the upper surface of the cassette guide 1.

On the other hand, a lock lever 12 is rotatably supported on the outside of the cassette ejection lever 3 by a pin 13. The lock lever 12 has a protruding piece 12 at one end thereof.
a is formed, and a projecting piece 12b is provided at the other end.

A torsion coil spring 14 is wound around the pin 13, giving the lock lever 12 the ability to rotate clockwise in FIG.
applies a force in the direction of engaging the stepped portion 3c of the cassette ejection lever 3 on the guide pin 4 side.

An eject lever 15 is slidably provided on the outside of the cassette guide 1, and a button (not shown) is attached to the eject lever 15 on the side of the cassette insertion opening.

When this eject lever 15 is pushed against the tensile force of a spring (not shown), it engages with the protrusion 12b of the lock lever 12 and rotates counterclockwise in FIG. 3c, the cassette ejection lever 3 can be released and moved in the ejection direction.

Next, the operation of the conventional device configured as above will be explained.

The state shown in FIG. 1 shows the state in which the magnetic disk cassette 2 is installed. In this state, the magnetic disk cassette 2 advances while being guided by the cassette guide 1, and its tip touches the stopper of the cassette ejection lever 3. 11, the cassette ejection lever 3 is pushed to the right in FIG. .

In the middle of this, the tip of the protruding piece 12a has come into contact with the side edge 3d of the cassette ejection lever 3, and the lock lever 12 has been rotated slightly counterclockwise in FIG. 1 protrusion on the part
2a, the lock lever 12 is rotated clockwise in FIG. 1 by the force of the torsion coil spring 14, so that the protruding piece 12a is connected to the stepped portion 3c.

In this state, the ejection lever 3 is locked, and the magnetic disk cassette 2 is not ejected.

Recording information using magnetic disk cassette 2,
If it is desired to eject the magnetic disk cassette 2 after the reproduction has been performed, the eject lever 15 is pushed from the state shown in FIG. 1 via a push button (not shown). Then, the tip of the eject lever 15 comes into contact with the projection 12b of the lock lever 12, and the lock lever 12 is rotated counterclockwise in FIG. 1 against the force of the torsion coil spring 14.

As a result, the protruding piece 12a separates from the stepped portion 3c, and the cassette ejection lever 3 is pulled to the left in FIG. 1 by the tensile force of the spring 10. Then, the magnetic disk cassette 2 is pushed in the ejection direction via the stopper 11, and the magnetic disk cassette 2 is projected forward from a cassette insertion opening (not shown), and can be pulled out by pinching with fingers.

In this way, the magnetic disk cassette can be ejected very easily simply by pressing the eject lever.

However, if the above structure is adopted, a washer 6 and a C-ring 7 are required to guide the cassette ejection lever 3 and prevent it from falling off, and a torsion coil spring 14 is also required.

As a result, the number of parts increases, the number of assembly steps increases accordingly, and the cost also increases from an economic standpoint.

Purpose The present invention was made in view of the above circumstances, and it is possible to reduce the number of parts, facilitate assembly,
It is an object of the present invention to provide a cassette ejecting device configured to realize cost reduction.

In order to achieve the above object, the present invention utilizes a spring that applies a force to the lock lever in the locking direction with respect to the cassette ejection lever, and this spring applies a rotational force to the lock lever in the locking direction and prevents the cassette ejection lever from falling off. We adopted a structure that provides the function of preventing

Embodiments Hereinafter, details of the present invention will be explained based on embodiments shown in the drawings.

FIG. 2 illustrates an embodiment of the present invention.
In the figure, the same or corresponding parts as in FIG.

In this embodiment, the lock lever 12 is rotatably supported via a pin 13 in the same way as in the conventional example described above.
Another pin 16 is provided protruding near the end on the 2a side, and the center portion of a spring 17 bent in a substantially dogleg shape is hooked onto this pin 16. Both ends of the spring 17 are bent portions 17a and 17b bent into a substantially U-shape, and one bent portion 17a is engaged with the guide pin 4, and the other bent portion 17b is engaged with the guide pin 4. It is engaged with pin 5.

Therefore, the spring 17 has the role of giving the lock lever 12 a tendency to rotate clockwise in the figure, engaging with the guide pins 4 and 5, and preventing the cassette ejection lever 3 from falling off the guide pins 4 and 5. It also serves a purpose.

Next, the operation of this embodiment configured as above will be explained.

Before the magnetic disk cassette 2 is installed, the cassette ejection lever 3 is pulled to the left by the tension of the spring 10 as shown by the chain line in FIG. It is pressed into contact with the side edge 3d of the lever 3. This pressing force is the spring 1
7 is giving.

When the magnetic disk cassette 2 is guided and inserted by the cassette guide 1 in this state, its tip will eventually come into contact with the stopper 11 at the tip of the cassette ejection lever 3, and it will be pushed forward against the tensile force of the spring 10. Press.

As a result, the cassette ejection lever 3 moves forward, and when the projection 12a of the lock lever 12 reaches the stepped portion 3c, it engages with the stepped portion 3c, and the cassette ejection lever 3 locks with the cassette accommodated. be done.

At this time, U formed at both ends of the spring 17
As is clear from FIG. 2, the letter-shaped bent portions 17a and 17b are located across the upper surfaces of the guide holes 3a and 3b, so that the cassette ejection lever 3
As a result, a washer or the like is not required as this results in preventing the separation of the parts and guiding them.

On the other hand, after information has been recorded and reproduced using the magnetic disk cassette 2, the magnetic disk 2
When it is desired to eject the lock lever, the eject lever 15 is pushed through a push button (not shown), and the tip of the eject lever 15 is pressed against the protrusion 12b of the lock lever 12. Then, the lock lever 12 is rotated counterclockwise in FIG. 2 against the force of the spring 17, and the protrusion 1
2a is separated from the stepped portion 3c, the cassette ejection lever 3 is pulled to the left in FIG. 2 by the tension of the spring 10, and the magnetic disk cassette 2 is pushed out by the stopper 12 toward the cassette insertion slot.

Effects As is clear from the above explanation, according to the present invention, a single spring can perform both the locking function for the lock lever and the function for preventing the cassette ejection lever from separating. It is possible to provide a cassette ejecting device that can constitute a cassette ejecting mechanism without requiring a C-ring or a separate spring.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of essential parts to explain a conventional structure, and FIG. 2 is a perspective view of essential parts to explain an embodiment of the present invention. 1...Cassette guide, 2...Magnetic disk cassette, 3...Cassette ejection lever, 4, 5...
Guide pin, 6...Washer, 7...C ring, 8,
9, 12a, 12b...projection piece, 10...spring, 11...stopper, 12...lock lever, 17...spring.

Claims (1)

[Claims] 1. In a cassette ejecting device equipped with a cassette ejecting lever and a locking lever for locking the cassette ejecting lever, the locking function for the locking lever and the function of preventing the cassette ejecting lever from coming off can be performed by a single continuous spring. A cassette ejection device characterized in that it is configured as follows.