JPH0244366Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> This invention relates to a cassette front cover opening mechanism in a VTR cassette loading device.

<Prior art> A VTR cassette is loaded by placing the front end of the cassette over the tape pull-out pin, so the cassette is held in the cassette holder at the cassette insertion slot, moved forward horizontally, and then the front end of the cassette is This is done by positioning the front lid part above the tape pull-out pin and then vertically moving it downward. However, since the conventional cassette front lid opening mechanism does not operate until the cassette begins to move vertically, the front lid remains closed when the cassette moves horizontally. Therefore, in order to prevent the lower end of the front cover from colliding with the head of the tape pull-out pin when the cassette moves horizontally, it is necessary to provide a certain amount of clearance between the lower edge of the front cover and the head of the tape pull-out pin. I had to open it up and move it horizontally. For this reason, VTRs with a conventional cassette front lid opening mechanism
In the case of the cassette loading device, the cassette must move vertically downward from a position higher than the head of the tape pull-out pin, which limits the minimum vertical stroke of the cassette. It had become an obstacle.

<Purpose of the invention> This invention was made in view of the above circumstances, and by opening the front cover of the cassette to a certain extent from the latter half of the horizontal movement, the amount of vertical movement of the cassette can be reduced by the tape drawer. It is an object of the present invention to provide a cassette loading device for a VTR that can be made thinner by making the height smaller than the height of a pin.

<Structure of the invention> In order to achieve the above-mentioned object, this invention provides the cassette front lid opening mechanism with a contact portion 14 at the rear end that comes into contact with the front end of the cassette holder, and
A sliding lever 2 is attached to the base plate 4 so as to be slidable back and forth, and is biased backward by a spring 11.
A grooved cam 16 is rotatably supported by the sliding lever 2 and is loosely fitted into the guide pin 7 fixed to the base plate 4, and the tip 15 of the grooved cam 16 is rotatably supported by the sliding lever 2. and a rotating lever protruding further rearward from the abutting portion 14 of the lever, and when the sliding lever 2 is pressed against the front end of the cassette holder and slides, the rotating lever 3 moves against the sliding lever 2. , and at this time, the rotating lever rotates upward due to the sliding movement between the guide pin 7 and the grooved cam 16.

<Embodiment> FIGS. 1 to 4 are side views of a cassette front lid opening mechanism that is an embodiment of this invention.

The cassette front lid opening mechanism 1 is composed of a sliding lever 2 and a rotating lever 3. A support member 5 that supports these levers 2 and 3 is fixed to the base plate 4. This support member 5 has two guide pins 6 and 7 implanted in the front and rear that project laterally. Further, a spring hook 8 is provided below the guide pins 6 and 7 of the support member 5. Sliding lever 2
This is a lever that has a horizontal long hole 9 in the front and back, and a spring hook 10 at the lower front end. The long hole 9 of this sliding lever 2 is connected to the two guide pins 6 of the support member 5,
7, the sliding lever 2 is attached to the base plate 4 so as to be slidable back and forth. By tensioning the tension coil spring 11 between the spring hook 10 of the sliding lever 2 and the spring hook 8 of the support member 5, the sliding lever 2 is biased rearward. Further, at the rear end of the sliding lever 2, a vertically long abutting portion 14 is provided which abuts the front end 13 of the cassette holder 12. Rotating lever 3
is a lever whose front end is rotatably supported by the sliding lever 2, and whose rear end protrudes further rearward than the contact portion 14 of the sliding lever 2 to form a tip portion 15. Further, this rotary lever 3 is provided with a grooved cam 16 in the form of an oblique long hole whose front side faces upward, and this grooved cam 16 is fitted onto the guide pin 7 at the rear of the support member 5 . Therefore, when the sliding lever 2 slides forward, the rotating lever 3
6, the distal end portion 15 rotates to move upward.

The operation of the cassette front lid opening mechanism configured as described above will be explained.

FIG. 1 shows the cassette holder 12 holding the cassette 17 horizontally moving forward and just before the front end 13 comes into contact with the contact portion 14 of the sliding lever 2. As shown in FIG.
The sliding lever 2 is biased by the tension coil spring 11 and positioned at the rear end until the front end 13 of the cassette holder 12 comes into contact with the abutting portion 14. Further, the tip 15 of the rotary lever 3 is also located at the lower end, and the front cover 18 of the cassette 17 moves horizontally above it. FIG. 2 shows the cassette holder 12.
The front end 13 of the slide lever 2 comes into contact with the contact portion 14 of the slide lever 2, and the slide lever 2 is shown starting to be pushed forward. The sliding lever 2 slides forward against the bias of the tension coil spring 11 as the cassette holder 12 moves horizontally. The rotating lever 3 moves forward as the sliding lever 2 slides, and starts rotating so that the tip 15 moves upward.
Therefore, the front cover 18 of the cassette 17 located above the tip 15 of the rotary lever 3 is pushed open slightly upward. At this time, the lower end of the front cover 18 passes over the head of a tape pull-out pin (not shown). Note that the locking mechanism of the front lid 18 is released by a device not shown. FIG. 3 shows the cassette holder 12 when it has completed its horizontal forward movement. Sliding lever 2
The contact portion 1 is attached to the front end 13 of the cassette holder 12.
4 is pushed and is located at the front end. Further, the tip end 15 of the rotary lever 3 is also located at the upper end, and opens the front cover 18 of the cassette 17 by a predetermined amount. FIG. 4 shows when the cassette holder 12 has completed its downward vertical movement. While the cassette holder 12 moves vertically with its front end 13 in contact with the contact portion 14, the sliding lever 2 and the rotating lever 3 do not operate. However, since the front cover 18 of the cassette 17 remains locked to the tip end 15 of the rotating lever 3, it is completely opened as shown in the figure when the cassette holder 12 reaches the lower end. In addition, the sliding lever 2
Since the abutting part 14 is vertically straight, the sliding lever 2 and the rotating lever 3 do not operate while the cassette holder 12 moves vertically. By making 14 into a cam shape, it is possible to operate the rotating lever 3 while the cassette holder 12 is moving vertically.

<Effect of the invention> As explained above, in this cassette front lid opening mechanism, when the cassette moves horizontally and passes over the head of the tape pull-out pin, the front lid is opened to some extent, so the lower end of the front lid is As it is lifted upward, there is more space between it and the head of the tape pull-out pin. Therefore, the cassette can be moved horizontally at a lower position by this margin, and the amount of vertical movement of the cassette can be reduced.
This makes it possible to respond to thinner designs.

[Brief explanation of drawings]

1 to 4 are side views of a cassette front lid opening mechanism, which is an embodiment of this invention. 1-Cassette front lid opening mechanism, 2-Sliding lever,
3- Rotating lever, 4- Board, 11- Tension coil spring (spring), 12- Cassette holder, 13- Front end, 14- Contact part, 15- Tip part, 16- Groove cam (cam), 17- Cassette , 18-Anterior operculum.

Claims (1)

[Scope of Claim for Utility Model Registration] In a VTR cassette loading device that loads a cassette by holding the cassette in a cassette holder, moving it horizontally forward, and then vertically moving it downward, the front end of the cassette holder is placed at the rear end. A sliding lever 2 is provided with an abutting portion 14 that comes into contact with the base plate 4, and is attached to the base plate 4 so as to be slidable back and forth, and is biased backward by a spring 11. The grooved cam 16 is pivotably supported and loosely fitted into the guide pin 7 that is fixed to the base plate 4, and the tip end 15 of the grooved cam 16 is further rearward than the abutment part 14 of the sliding lever. It has a protruding rotating lever, and when the sliding lever 2 is pressed against the front end of the cassette holder and slides, the rotating lever 3 moves along with the sliding lever 2, and at this time, the guide pin A cassette front lid opening mechanism in which a rotary lever is rotated upward by sliding between a grooved cam 7 and a grooved cam 16.