JPH0216439Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a cassette lid opening/closing device in a cassette attaching/detaching device for a video tape recorder (VTR) or the like.

Since a cassette-type VTR uses a tape cassette with a lid for protecting the tape, it is necessary to keep the protective lid open a predetermined amount for tape loading when the cassette is installed. Conventionally, a method for mounting a cassette is to provide a cassette holder that moves up and down relative to the VTR body, insert the cassette into the cassette holder, and then mount the cassette to the VTR body. in this case,
Since the locking means on the lid is released when the cassette is inserted into the cassette holder, as the cassette holder (not shown) is lowered, the cassette and the fixing bracket 2 installed on the chassis 1 of the VTR main body are removed, as shown in Fig. 5. The lid 3a is opened by contacting the lid 3a. Note that this is the axis that is the center of opening and closing of 3b indicated by the broken line.

As shown by the broken line in FIG. 5, the cassette holder is locked with the lid 3a of the cassette 3 opened a predetermined amount, and the tape is loaded. When the cassette is removed, the tape is unloaded and the cassette holder rises, and the lid 3a, which is urged by the spring to the closed position (the state shown by the solid line in FIG. 5), closes as the holder rises. The fixture 2 is arranged so as to come into contact with the end of the cassette 3, so that loading and unloading of the tape is not hindered.

As described above, conventional cassette opening/closing devices have a simple structure, but the amount of vertical movement required to open the cassette lid by a predetermined amount is fixed at a relatively large value and cannot be reduced. . This is true for front-loading type VTRs, which have been recently adopted due to their ease of operation, i.e.
The method of loading the cassette through the cassette insertion slot on the front of the VTR is disadvantageous when trying to make the VTR body thinner.

The present invention has been developed in view of the above points, and has a simple structure, and is suitable for use in front-loading type VTRs that require only a small amount of vertical movement to open a predetermined amount of lids. This paper proposes an effective cassette lid opening/closing device.

Embodiments of the present invention will be described below with reference to the drawings.
In FIGS. 1 to 3, reference numeral 1 denotes the chassis of the VTR body, and mechanisms naturally necessary for the VTR, such as a reel stand, are not shown. 3 is a tape cassette, which has a lid 3a that can be opened and closed;
A tape cassette for VTR is shown. The cassette 3 is inserted through a cassette insertion opening on the front surface of the VTR, and is moved horizontally in the direction of the arrow in the figure together with a cassette holder (not shown). As in the conventional example, the lid 3a is unlocked when it is attached to the cassette holder. Incidentally, FIG. 4 is a plan view showing the positional relationship between the cassette 3 and the lid opening/closing device 4 .

The support plate 5 erected on the chassis 1 has a rotating piece 6
A protrusion 5a (first regulating means) and a protrusion 5b that rotatably support the rotating piece 6 and define the position of the rotating piece 6.
(second regulating means) is integrally molded. The torsion spring 7 is a rotating piece 6 supported on the support plate 5.
A biasing means for biasing in a counterclockwise direction in the figure,
As shown by broken lines in FIGS. 1 and 2, the shaft 6a is fitted onto the shaft 6a projecting from the rotating piece 6, and is then sandwiched between the support plate 5 and the rotating piece 6. 5c is a spring locking projection provided on the support plate 5.

As shown in the figure, the rotating piece 6 is a combination of a rectangle and a right triangle, and has a first abutting part 8 that is one side of the rectangular part, and a hypotenuse of the right triangular part that is continuous with the first abutting part 8. It has a second abutting portion 9 . Rotating piece 6
is normally biased counterclockwise by a spring 7 and comes into contact with the protrusion 5a, in the state shown in FIG. That is, the first abutting portion 8 is inclined at a certain angle toward the direction A in which the cassette 3 enters.

Next, the lid opening/closing operation will be explained with reference to FIGS. 1 to 3. The cassette 3 inserted through the insertion slot moves horizontally together with the cassette holder, and the cassette lid 3a
FIG. 1 shows a state in which the first contact portion 8 of the rotating piece 6 is in contact with the first contact portion 8 of the rotating piece 6. As the horizontal movement of the cassette 3 further progresses, the rotating piece 6 rotates clockwise in the figure against the biasing force of the spring 7, and this rotation continues until it is restricted by the protrusion 5b. At this time, the lid 3a rides on the rotating piece 6, and when the horizontal movement of the cassette 3 is completed, it is in the state shown in FIG. 2. At the end of the horizontal movement, remove the lid 3 of the cassette.
By opening a, the amount of vertical movement required is reduced. From the condition shown in Figure 2, cassette 3
When the cassette holder moves in the vertical direction, the cassette holder (not shown) is locked in the state shown in FIG. 3, and the lid 3a is opened by the required amount, allowing loading. The second abutment portion 9 serves to maintain the pivoting piece 6 in the state shown in FIG.

As described above, according to the present invention, it is possible to realize a cassette lid opening/closing device which has a simple structure and is effective in reducing the thickness of a so-called front loading type VTR.

[Brief explanation of drawings]

Figures 1 to 4 relate to embodiments of the present invention;
2 and 3 are side views for explaining the configuration and operation of the embodiment, and FIG. 4 is a plan view of the embodiment.
FIG. 5 is a side view showing a conventional example. Explanation of main drawing numbers, 3...cassette, 3a...
Lid, 6... Rotating piece, 7... Spring (biasing means), 5
a, 5b...Protrusions (first and second regulating means).

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In a cassette lid opening/closing device in a cassette attaching/detaching device for a tape cassette having a tape protection lid, the cassette lid is rotated in response to the horizontal movement of the tape cassette 3 and the cassette lid is slightly opened. A rotating piece 6 is provided to
When the horizontal movement is completed, the cassette lid is slightly opened, and then the tape cassette is moved downward with the rotating piece in contact with the cassette lid, thereby completely opening the cassette lid. A cassette lid opening/closing device characterized by: (2) As the tape cassette 3 moves horizontally, the rotating piece first contacts the cassette lid 3a at the first contact portion 8.
and a second contact portion 9 that is continuous with the first contact portion.
and is rotatably supported, and the rotating piece is in an initial state in which the first contact portion is inclined with respect to the horizontally moving tape cassette in response to the horizontal movement of the tape cassette. The cassette lid is closed by slightly rotating the tape cassette from the tape cassette. A cassette lid opening/closing device according to claim 1, characterized in that the cassette lid opening/closing device is configured to completely open the lid.