JPH0426993Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a mechanism for opening the lid of a tape cassette when the tape cassette is installed in a VTR device.

BACKGROUND TECHNOLOGY AND PROBLEMS The tape cassette lid opening mechanism in conventional VTR equipment uses an arm and a cam groove in which it slides to open the lid 1/2 when the tape cassette moves horizontally.
When the tape cassette is moved vertically, a metal plate (not shown) attached to the apparatus is engaged with the lid to completely open the tape cassette. During this lid-opening operation, the lid of the tape cassette slides on the rounded part of the sheet metal to open, so it is necessary to make the rounded part of the sheet metal completely smooth. In addition, this sheet metal must be installed with extremely high precision.
Therefore, the lid opening mechanism using such a sheet metal has problems such as being troublesome to manufacture and high in cost.

Purpose of the Invention In view of the above-mentioned points, the present invention provides a tape cassette lid opening mechanism that is structurally simple and can be provided at low cost.

Summary of the invention The present invention has a storage stand for tape cassettes, and supporting members supported from both sides so that the storage stand can be transferred from a horizontal direction to a vertical direction. A lid opening member is provided which is supported and opens the lid of the tape cassette by the rotation thereof, and a pin and a claw portion are provided at the other end of the lid opening member, and this pin engages with a guide groove of the support member. By being guided, the lid-opening member is rotated so that the claw portion comes into contact with the lower end of the lid, while the support member has the other end of the lid-opening member rotated. A boss is provided as a dynamic fulcrum,
In the process of horizontally moving the tape cassette together with the storage stand, the lid-opening member is rotated around the axis, and the claw portion comes into contact with the lid of the tape cassette, so that the lid begins to open. When the storage table moves in the vertical direction, the lid opening member is rotated by the boss using the other end as a fulcrum to fully open the lid, and the lid opening member maintains this fully open state. This is a mechanism for opening the lid of a tape cassette.

The tape cassette lid opening mechanism of this invention has a simple structure and can be produced at low cost.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In Figures 1 and 2, reference numeral 1 indicates a tape cassette for a VTR, which has a cross-sectional shape consisting of a cassette body 3 in which a tape 2 is stored, and a rotatably disposed front side of the cassette body 3 on the side from which the tape is pulled out. It consists of a substantially L-shaped lid body 4. The lid 4 is biased in the closing direction by a helical spring or the like (not shown), and is normally in a closed state. An opening 5 is formed on the back surface of the cassette main body 3 at the end thereof on the lid side, into which a claw portion 22 of a lid opening member 20, which will be described later, is inserted. Reference numeral 10 indicates a lid opening mechanism of the VTR device, reference numeral 11 indicates a storage stand for the tape cassette 1, and reference numeral 12 indicates support members that support the storage stand 11 from both sides. First and second engagement pins 13 and 14 are provided on both side plates of the storage stand 11, respectively.
This is engaged with first and second guide grooves 15 and 16 provided on the inner surface of the support member 12. 1st
and the second guide grooves 15 and 16 are horizontal groove portions 1, respectively.
A vertical groove portion 18 is continuous at the tip of the portion 7 . Therefore, the storage stand 11 that stores the tape cassette 1 has its engagement pins 13 and 14 and the support member 1
After being moved horizontally by the guide grooves 15 and 16 on the second side, it is lowered vertically and set at a predetermined position. The tape cassette 1 is placed at the end of the bottom plate of the storage table 11 in the tape cassette insertion direction.
A locking part 11a that comes into contact with the front end of the lid to restrict the insertion position and a release part (not shown) that releases the locking member 30 of the lid body are integrally provided. One side plate of the storage stand 11 is integrally provided with an opening member, ie, a rotating arm 20, whose one end is fitted onto a shaft 19 integral with the side plate and pivotably supported.
As shown in FIG. 7, this rotating arm 20 is integrally provided with a pin 23 at the other end that engages with the third guide groove 21 of the support member 12, and extends from the surface opposite to this pin. A claw portion 22 that can be engaged with the opening 5 on the back side of the tape cassette 1 is integrally provided. This claw portion 22 engages with the lower edge of the lid 4 and the opening 5 by rotating the rotation arm 20 about the axis 19, and moves the lid 4 in the opening direction (see Fig. 6). . On the other hand, the pin 23 of the rotating arm 20
The third guide groove 21 with which the pin 23 engages consists of a horizontal portion 21a, a portion 21b extending obliquely upward from this, and a portion 21c further extending horizontally at the terminal end. It is relatively wide to allow for free movement.
A boss 24, for example, a means for making the end of the rotating arm 20 a pivot point, is protruded from the support member 12 at a position slightly below the upper horizontal portion 21c. The rotating arm 20 is in a state where it can rotate freely because it is only fitted into the shaft 19, but when the storage table 11 is in the initial position (the state shown in FIG. 2), it abuts against a part of the side plate of the storage table 11. further rotation is prevented. In that state, pin 23 is
The pins 13 and 14 are also located at the starting end of the horizontal portion 21a of the guide groove 21 of the first and second guide grooves 1, respectively.
It is located at the starting end of horizontal grooves 16 No. 5 and 6.

Next, the operation of such a configuration will be explained with reference to FIGS. 2 to 5. First, place tape cassette 1 on storage stand 1.
Place it on 1. The tape cassette 1 is set in the correct position on the storage table 11 by its locking portion 11a (see FIG. 2). From this state, the tape cassette 1 and the storage stand 11 are removed from their pins 13 and 14.
and is moved in the horizontal direction by the first and second guide grooves 15 and 16. With this movement, the pin 23 of the rotating arm 20 is simultaneously guided along the third guide groove 21, and as the pin 23 moves obliquely upward, the rotating arm 20 rotates about the shaft 19. Due to this rotation, the claw portion 22 comes into contact with the lower edge of the lid 4, and the lid begins to open (see FIG. 3). Then, with the storage stand 11 positioned at the end of the horizontal groove portion 17, the lid body is opened to about 1/3. At this time, the pin 23 of the rotating arm 20 is located at the end of the upper horizontal portion of the guide groove 21 (see FIG. 4). Next, when the pins 13 and 14 are guided along the vertical groove 18 and the storage stand 11 is lowered vertically together with the tape cassette 1, the pin 23 of the rotating arm 20 does not move and the support member 12 When the other end of the rotating arm 20 comes into contact with the boss 24, the rotating arm 20 is rotated clockwise in the figure about the other end, thereby moving the storage table 11 to a predetermined lowered position. The lid 4 of the tape cassette 1 is fully opened when the tape cassette 1 is set. The fully open state of the lid body 4 is maintained by the rotating arm 12. Then tape 2 is pulled out. After recording or playback is finished and the tape is returned to the cassette, as the storage table 11 rises, the rotating arm 20 rotates in the opposite direction, and the lid 4 is rotated in the closing direction. As the storage table 11 further moves horizontally to its original position, the lid 4 closes and is completely closed at its original position.

Effects of the invention According to the invention, when the storage stand is moved in the horizontal direction by the opening member, that is, the rotating arm, the lid of the tape cassette becomes half-open, and the tape cassette lid is further lowered using the rotating arm. Sometimes, the other end is locked to the boss, and the rotating arm is rotated about the other end to fully open the lid of the tape cassette, and this fully opened state is maintained by the lid opening member. Therefore, the structure is simple and inexpensive, without using extremely high-precision sheet metal as in the prior art.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a tape cassette applied to the present invention, Fig. 2 is a schematic diagram of the tape cassette lid opening mechanism of the present invention, Figs. 3 to 5 are diagrams of its operating state, and Fig. 6 7 is a perspective view of the main parts of the tape cassette showing the opened state, and FIG. 7 is a perspective view of the lid opening member used in the present invention. 1 is a tape cassette, 4 is a lid, 11 is a storage stand, 12 is a support member, 13 and 14 are engagement pins, 1
5 and 16 are guide grooves, 20 is a lid opening member, 22 is a claw portion, 23 is a pin, 21 is a guide groove, and 24 is a boss.

Claims (1)

[Scope of utility model registration request] A storage stand 11 for the tape cassette 1 and the storage stand 1
A shaft 19 at one end is rotatably supported on the storage stand 11, and the lid of the tape cassette is rotated by the rotation. A lid opening member 20 for opening the body 4 is provided, and a pin 23 and a claw portion 22 are provided at the other end of the lid opening member 20, and the pin 23 engages with the guide grooves 15 and 16 of the support member. By being guided, the lid opening member is rotated so that the claw portion 22 comes into contact with the lower end of the lid body 4. The lid opening member 20 is attached to the support member 12.
A boss 24 is provided with the other end of the tape cassette 1 as a rotational fulcrum, and the lid opening member 20 is rotated about the shaft 19 in the process of horizontally moving the tape cassette 1 together with the storage table 11. In addition, the claw portion 2
2 comes into contact with the lid 4 of the tape cassette 1, the lid 4 begins to open, and the storage stand 11
When the lid moves in the vertical direction, the lid opening member 20 is rotated by the boss 24 using the other end as a fulcrum, and the lid body 4 is fully opened, and the lid opening member 20 allows the lid opening member 20 to maintain this fully open state. A tape cassette lid opening mechanism configured to hold a tape cassette.