JPS60131669A - Cassette storing device - Google Patents

Abstract

PURPOSE:To prevent misloading of a cassette without injuring the cassette nor a cassette storing device by adhering an end of the titled device to one end of a misloading preventing spring together and making the other end mobile to the upward force, and at the same time, inhibiting moving by abutting other end on an upper plate to the downward force. CONSTITUTION:In case a cassette 1 is inserted backward with large pressure, the cassette 1 rides on a hook projection 7. Therefore, the upper edge of the cassette 1 hooks an end face 17a of a misloading preventing piece 17 to prevent the loading of the cassette 1. Under such a condition the cassette 1 is pushed inside more intensively. Thus the piece 17 and a misloading preventing spring 16 adhered to an upper plate 15 produce the force toward an arrow (a) from the relation of force among the welded part 16a of the spring 16, the face 17a and the cassette loading direction. A mobile tip 16b of the spring 16 abuts on the plate 15 by the force of the arrow (a). Thus the force of the arrow (a) can be prevented by the plate 15, therefore the loading of the cassette 1 is inhibited.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a cassette storage device for storing and holding cassettes containing tape-shaped recording media such as magnetic tapes.

Conventional Structures and Their Problems Conventionally, structures shown in FIGS. 1 and 2 have been considered in order to allow a tape cassette to be inserted into a recording/reproducing apparatus only in the normal insertion direction.

In FIGS. 1 and 2, 1 is a cassette body that houses a reel (not shown) wound with magnetic tape inside, and a shaft 2 is attached to the front side of the cassette body as a pivot shaft. A lid body 3 is provided. After the cassette is inserted into the device, this lid body 3 is opened by a known means and 1. □ 4 is a cassette storage stand provided in the recording and reproducing apparatus, which is configured to expose the internal magnetic tape, and the cassette 1 is inserted through an opening 6 provided at one end.

An engaging protrusion 7 is provided near the opening 5 of the bottom plate 6 of the cassette storage stand 4, so that the cassette can be held in its normal state.
When inserting the cassette, an engaging groove 8 is formed at the lower edge of the front surface of the cassette opposite to the engaging protrusion 7 and is open in the cassette insertion direction.

That is, only when the cassette 1 is forcefully inserted into the set storage stand 4 in the normal Ω state, the engagement protrusion 7 and the engagement curved groove 8 engage, and the cassette 1 is inserted into the cassette storage stand 4. In other states, the engaging protrusion 7 abuts against the edge of the cassette 1 and prevents its insertion.

However, even if you insert the cassette with the inside of the cassette upside down,
If the cassette is suddenly pushed in with a strong force, the cassette may be inserted while riding on the engagement protrusion 7, which may damage the cassette and the device.

This problem can be solved by making the amount of protrusion of the engagement protrusion 7 sufficiently large, but if the amount of protrusion of the engagement protrusion 7 is increased, the engagement groove 8 of the cassette will change depending on the amount of protrusion. It becomes necessary to increase the depth of the cassette, and the thickness of the bottom plate of the cassette body must be increased accordingly, which is inconvenient.

Therefore, in order to solve these problems, conventionally, Figure 3,
The method shown in Figure 4 was considered.

A conventional example will be explained below.

In FIG. 3, reference numeral 4 denotes a cassette storage stand, which is configured to be lowered in the direction of arrow B after the cassette 1 is inserted, so that the reel in the cassette 1 and the reel stand 16 are engaged with each other. Reference numeral 7 denotes a retaining protrusion provided on the bottom plate 6 of the cassette storage stand 4, and 11 represents a stopper that comes into contact with the cassette 1 inserted into the cassette storage stand 4 to regulate its insertion position. 14 is a cassette cover provided on the cassette storage stand 4, and 012 is a lever for preventing erroneous insertion.

One end of the lever 12 for preventing incorrect insertion is rotatably supported by a shaft 13 on the outer surface of the cassette storage stand 4, and the other end of the lever 12 is inserted into the inside of the cassette storage stand 4. The portion is bent downward, and a tipper surface portion 12a is formed at the tip of the bent portion in the direction in which the cassette enters.

Further, this lever 12 is biased by a spring 14 to rotate counterclockwise in FIG.
The pin 16 restricts its rotational position.

In the state regulated by this stopper pin 16, as clearly shown in FIG. , and is configured to be located slightly further back than the bent engagement protrusion 7 in the insertion direction of the cassette.

Next, this operation will be explained.

When the cassette 1 is inserted in the normal positional relationship, as shown in FIG.
Since the engaging protrusion 7° engages with the cassette 1, the cassette 1 is inserted along the bottom plate of the cassette storage base 4. Therefore, since the upper edge of the cassette 1 comes into contact with the tipper part 12a of the lever 12, the lever 12 moves as the cassette 1 is inserted.
It is rotated against the spring 14 and the cassette 1 is inserted without any problem.

On the other hand, if cassette 1 is strongly inserted in the opposite direction,
As shown in FIG. 6, the cassette 1 is placed on the engagement protrusion 7. Therefore, the upper edge of the cassette 1 is at a higher position than the tipper portion 12a of the lever 12, and the bent portion of the lever 12 and the upper edge of the cassette 1 are engaged, preventing further insertion of the cassette. However, according to the above method, when the cassette is inserted vertically as shown in FIG. 7, the lever 12 and the cassette 1 do not engage at all, and the lever 12 does not act. Therefore, if the cassette is suddenly pushed in with a strong force as in the past, the cassette may be inserted while riding on the retaining protrusion 7, which may damage the device.

OBJECT OF THE INVENTION The present invention solves the above-mentioned problems of the conventional art. It is an object of the present invention to provide a cassette storage device that does not cause damage to cassettes or devices.

Structure of the Invention The present invention has an erroneous insertion prevention spring that is fixed to one end of an erroneous insertion prevention spring having an erroneous insertion prevention piece at the back of the upper plate of the cassette storage table in the approximate center thereof, and the other end is movable against upward force. At the same time, by using a structure that prevents downward force by contacting the other end with the upper plate, there is no damage to the cassette or the device if the cassette is inserted from the wrong direction. This is to prevent this without causing any harm.

DESCRIPTION OF THE EMBODIMENTS FIGS. 8 and 9 are a perspective view and a simplified side sectional view of the main parts showing an embodiment of the present invention, and the same numbers are given to the same parts as in the conventional art.

In FIGS. 8 and 9, reference numeral 15 denotes the upper plate of the cassette storage stand 4, which is attached to the storage stand 4 with screws or the like.

17 is a piece to prevent incorrect insertion, and a spring 16 to prevent incorrect insertion.
It is fixed by outsert etc. The incorrect insertion prevention spring 16 is made of an elastic body, and its tip 16a is fixed to the upper plate 15 of the cassette storage table 4, and is movable upward using the fixed point as a fulcrum. Other end 1
6b is configured to come into contact with the upper plate 16, and has the role of blocking downward force (in the direction of the lower plate 6).

Reference numeral 18 indicates a hole provided in the upper plate 16, into which the incorrect insertion prevention piece 17 is inserted. Misinsertion prevention spring 16
The fixed position is located toward the back of the cassette insertion direction.

Next, this operation will be explained. .

When the cassette 1 is inserted in the normal positional relationship, as shown in FIG. It is inserted into the bottom plate 6 of the stand 4. For this reason, cassette 1
The upper edge of the cassette 1 can be inserted into the incorrect insertion prevention piece 17 without any problem.

On the other hand, when the cassette 1 is strongly inserted in the opposite direction, the cassette 1 rides on the engagement protrusion 7 as shown in FIG. Therefore, the upper edge of the cassette 1 engages with the end surface 17a of the erroneous insertion prevention piece 17, thereby preventing insertion. In this state, if you push it in even harder, the erroneous insertion prevention piece 17 and the upper plate 151/i1: The erroneous insertion prevention spring 16, which is fixed to the Due to the force relationship with the insertion direction in which the cassette 1 is inserted, a force acts in the direction of arrow A. This force in the direction of A causes the unfixed tip 16b of the incorrect insertion prevention spring 16 to
Since the upper plate 15 is configured to abut against each other, the force in the direction A is blocked by the upper plate 15. Therefore, the insertion of the cassette is prevented.Also, if the cassette 1 is inserted vertically, which was a problem in the past, the state shown in Fig. 11 will occur, which is the same as when the cassette 1 is inserted in the opposite direction, and the insertion will be completely blocked. 0 Effects of the Invention As described above, according to the present invention, if the cassette is accidentally inserted in the wrong direction or in the vertical direction, and the cassette rides on the retaining protrusion, no further damage will occur. Inserting the cassette
Damage to the cassette and device will be eliminated as this will be prevented by the incorrect insertion prevention piece provided on the incorrect insertion prevention spring.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an example of a conventional tape cassette, Fig. 2 is a perspective view showing the bottom of the tape cassette, Fig. 3 is a perspective view showing the conventional example, and Fig. 4 is a configuration diagram of the main parts. FIG. 5 and FIG. 6 are explanatory diagrams of the same operation. FIG. 7 is a perspective view when a conventional cassette is inserted vertically. FIG. 8 is a cassette storage device according to an embodiment of the present invention. FIG. 9 is a side view showing the configuration of the essential parts, and FIGS. 10 and 11 are side views for explaining the operation of this embodiment. 1... Cassette, 4... Cassette storage stand, 6... Bottom plate, 7... Engaging protrusion, 8
......Engagement groove, 15...Top plate, 16.
... Spring to prevent incorrect insertion, 17... Piece to prevent incorrect insertion. Name of agent: Patent attorney Toshio Nakao and 1 other person
3 Figure 4 Figure 5 Teeth Figure 6 Figure 7 Figure 8 Figure 9 Figure 11

Claims (1)

[Claims] A tape cassette having an engagement groove opened in the insertion direction at the lower edge of the front surface has a cassette storage base inserted along a bottom plate, and an engagement protrusion on the bottom plate that engages with the engagement groove. At the same time, one end of a misinsertion prevention spring having a misinsertion prevention piece located toward the back in the cassette insertion direction is fixed to approximately the center of the upper plate of the cassette storage table, and the other end is fixed to the fixing point as a fulcrum. The other end is movable against an upward force of the erroneous insertion prevention piece, and the other end is brought into contact with the upper plate of the cassette storage stand to which the erroneous insertion prevention spring is fixed against a downward force. The cassette storage device is characterized in that the erroneous insertion prevention piece is positioned further back in the cassette insertion direction than the engagement protrusion.