JPH0736244B2 - Cassette holder - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette holder, and more particularly to a cassette holder which has means for preventing the cassette from being inserted improperly while the holder main body moves up and down.

<Prior Art> A cassette holder that has been conventionally used in a VTR or the like is provided with a means for preventing illegal insertion such as insertion from the rear end face side of the tape cassette or insertion by turning over. There are many. As an example, a method is known in which a cassette bottom is provided with a notch along the insertion direction that opens only on the front end face side, while a cassette holder is provided with a protrusion that is recessed in the notch on the holder bottom plate. There is. With the above configuration, when the cassette is correctly inserted, the protrusion of the holder is recessed into the notch of the cassette, and the cassette can be inserted into the holder. This can be prevented by abutting the part.

By the way, at this time, if the upper surface of the cassette is not regulated in position with respect to the holder at all, the cassette will get over the protrusion and be inserted into the cassette holder. Therefore, generally, the upper surface of the cassette is also regulated in position with respect to the cassette holder so that the above situation does not occur. For example, Japanese Patent Application No. 200501/2005 (Japanese Utility Model Application No. 61-113271) filed earlier by the applicant of the present application discloses the above-described configuration.

<Problems to be Solved by the Invention> However, when the above-mentioned position regulation is performed, this position regulation is also performed when the cassette is correctly inserted. Therefore, even in this case, the degree of freedom of the cassette with respect to the holder in the vertical direction becomes poor. In other words, the degree of freedom must be made sufficiently small with respect to the depth of the notch provided in the cassette.

On the other hand, when a tape such as a VTR is pulled out from the cassette for recording / reproduction, accurate positioning is necessary with respect to the substrate of the device. Therefore, at the time of such recording / reproduction, that is, when the cassette is used, the positioning member attached to the chassis of the device is configured to accurately position the cassette with respect to the device.

At this time, if the cassette does not have a high degree of freedom in the vertical direction, the cassette holder itself must be positioned in the entire device with a degree of precision corresponding to the depth of the notch described above, which requires extremely precise processing technology. And Along with this, a strong material must be used for the holder body, which hinders the weight reduction of the device.

Further, generally, when the cassette holder is pushed down so as to move from the cassette insertion position to the cassette use position, the cassette lid is automatically pushed upward. However, if the cassette holder is pushed down manually without the above-mentioned position regulation, if it is pushed down abruptly, the cassette pushing up force on the lid may cause the cassette to float above the bottom plate. is there. At this time, if the cassette moves even in a direction parallel to the bottom plate, the cassette rides on the protrusion. Due to the riding of the cassette, even if the cassette holder is in the cassette using position, the reel hub of the cassette does not completely engage with the reel on the VTR side, resulting in defective running of the tape. Further, the tape itself cannot be accurately positioned on the capstan or the like, which causes a problem such as damage to the tape.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems as described above, and an object of the present invention is to provide a cassette holder that can always keep the position of the cassette in a desired state.

<Means for Solving Problems> In order to achieve the above object, the cassette holder according to the present invention is rotatably provided with respect to the holder main body in order to move the holder main body between the cassette insertion position and the use position. Rotation lever, a protrusion provided on the bottom plate of the holder body that faces the lower surface of the cassette to prevent unauthorized insertion of the cassette, and a pressing member that is biased to press the upper surface of the cassette downward. And a part of the rotating lever restricts the movement of the pressing member when the holder is in the cassette insertion position and between the cassette insertion position and the use position.

<Operation> With the above-described structure, the pressing member can be restricted in position in accordance with the rotation of the rotating lever, and accordingly, the weight of the cassette holder can be reduced, and at the same time, the cassette and the tape. In addition, the pressing member is subjected to position regulation so that no accident occurs and unauthorized insertion can be prevented.

<Embodiment> An embodiment of the present invention will be described below in comparison with a conventional cassette holder of the same type. FIG. 1 is a cassette holder as an embodiment of the present invention, FIG. 2 is an example of a conventional cassette holder, and FIGS. 3 (a) and 3 (b) are tape cassettes to which the present embodiment is directed.

In FIGS. 3 (a) and 3 (b), the cassette is composed of 1
It is indicated by. Reference numeral 2 is a cassette body, and 3 is a rotary lid for a tape pull-out opening rotatably attached to the front portion of the cassette body 2 by a shaft 7, and is normally locked by a lock claw (not shown) in a closed state shown in the figure. ing. Reference numeral 5 denotes a lock releasing operation member connected to the lock claw, which is formed on the left side of the cassette main body 2 along the insertion direction A of the cassette 1 from the front end surface side thereof to a position just past the rotary lid 3. It is arranged in the groove 2a as desired. The rotating lid 3 has a taper surface 3a which is lowered forward along the insertion direction A of the cassette 1. 4a and 4b indicate tape reels, and 6
FIG. 3 (a) shows a gap between the cassette body 2 and the lid 3.

Hereinafter, a cassette holder as an embodiment of the present invention will be described for a tape cassette as described above.

In FIGS. 1 and 2, 10 is a cassette holder body, 11
Is a turning lever whose one end is rotatably fixed to the cassette holder body 10. The lever 11 rotates counterclockwise when the cassette holder body 10 is pushed downward. The other end of the lever 11 moves along an opening 12a of a frame 12 fixed to a chassis of a device body such as a VTR. Along with this lever 1
1 moves to the position shown by the lever 11 ', and the holder body 10 moves from the cassette insertion position to the cassette use position. Although not shown, the holder main body 10 is biased upward in the drawing with respect to the frame 12, and a locking mechanism (not shown) is shown in the cassette use position where the holder main body 10 is pushed downward in the drawing. Is locked at.

13 is a protrusion provided on the bottom surface of the holder body 10, and 14 is an arrow.
The pressing member is biased in 16 directions. Now, when trying to insert the cassette 1 illegally at the cassette insertion position,
The tip of the cassette 1 abuts against the protrusion 13 and is configured to prevent this. On the other hand, at this time, the upper surface of the cassette 1 is pressed downward by the pressing member 14. The pressing member 14 is urged by the shaft 17 in the direction of the arrow 16 by the spring 18, so that the cassette 2
Press down on the top surface of.

However, in the conventional cassette holder shown in FIG. 2, there is a case where the cassette is allowed to be illegally inserted against the bias of the spring 18. That is, when the cassette 1 is forcibly inserted into the insertion opening from below, the bottom plate of the cassette 1 rides on the protrusion 13.

Further, when the cassette holder body 10 is pushed down abruptly, the cassette is lifted up from the bottom plate in the cassette holder by the above-mentioned force of pushing up the lid, and as shown in FIG.
There is a risk of getting on top.

On the other hand, as shown in FIG. 1, the protrusion 15 of the lever 11 comes into contact with the protrusion 21 of the pressing member 14 at the cassette insertion position and during the movement between the cassette insertion position and the use position. In Fig. 1, the rotating lever is shown by the dotted line 1 in the cassette use position.
The protrusion 15 and the protrusion 21 are released from contact with each other by rotating to the position 1 '. With such a configuration, the cassette pressing member 14 is regulated in the clockwise direction by the projections 15 and 21 when the cassette holder is in the cassette insertion position and while moving between the cassette use position and the insertion position. When the cassette holder is in the cassette use position, this position restriction is released.

With the above-described structure, when the cassette holder is at the cassette insertion position, the pressing member 14 and the projection 13 prevent the cassette from being illegally inserted, and the pressing member 14 moves the cassette 1 while the cassette holder is moving. It is possible to prevent the floating of the robot on the protrusion 13. Further, when the cassette holder is in the cassette use position, the cassette 1 is positioned by the openings 22a, 22b in the cassette holder bottom plate.
This can be done by a member fixed to the chassis to be inserted more, and the cassette holder does not need to be processed so precisely, and the weight can be reduced.

<Effects of the Invention> As described above, according to the present invention, the position of the cassette can be regulated to a desired state at all times, and accordingly, the weight of the cassette holder can be reduced and the accident of the cassette does not occur. A cassette holder can be obtained.

[Brief description of drawings]

FIG. 1 is a view showing the structure of a cassette holder as an embodiment of the present invention, FIG. 2 is a view showing an example of the structure of a conventional cassette holder, and FIGS. 3 (a) and 3 (b) are the same as the present invention. It is a figure which shows the tape cassette used as the cassette holder of one Example. In the figure, 1 is a cassette, 10 is a cassette holder main body, 11 is a rotating lever, 12 is a frame attached to a chassis, 13 is a protrusion of the bottom plate of the holder main body, 14 is a pressing member, and 15 is a protrusion of the rotating lever. , 21 are protrusions of the pressing member.

Claims (1)

[Claims] 1. A cassette for moving a holder main body between a cassette insertion position and a use position, a pivoting lever rotatably provided with respect to the holder main body, and a cassette for preventing illegal insertion of the cassette. The holder includes a protrusion provided on the bottom plate of the holder body facing the lower surface, and a pressing member biased to press the upper surface of the cassette downward, and the holder has a cassette insertion position and a cassette insertion position and a use position. The cassette holder, wherein a part of the rotary lever is configured to restrict the movement of the pressing member when in a position between and.