JPH0447785Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an automatic opening device for a cassette lid of a device using a cassette, such as a video tape recorder (hereinafter referred to as VTR).

This type of device in conventional VTRs had a lid opening arm that was constantly in contact with the cassette lid to hold the cassette lid open in the VTR operating position after loading the cassette, applying force to the cassette. It had the disadvantage of being easily damaged.

The present invention has been developed with the aim of eliminating this drawback, and is designed to prevent damage to the cassette by separating the lid opening arm from the cassette lid when the cassette is in the operating position.

The present invention will be explained below based on the embodiments shown in the drawings in which the present invention is applied to a VTR. First, the first embodiment will be described with reference to FIGS. 1 and 2. Reference numeral 1 denotes a known small tape built-in cassette, and its lid 2 is pivoted to the cassette body by a pin 3 so as to be rotatable in opening and closing.
is biased by the spring in the fully closed direction from the fully closed state to the approximately 15° open state, and is biased in the fully open direction from the fully open state to the approximately 75° open state. Reference numeral 4 denotes a loading frame for a cassette, and a frame transport device (not shown) for moving this frame 4 manually or powered by an electric motor between a cassette loading/unloading position and a VTR operating position. will be provided. Reference numeral 5 denotes a lid opening arm that opens the lid 2 of the cassette 1 loaded in the frame 4. This arm has two positions: one in the opening position 5A in which the cassette lid 2 moving toward the operating position is brought into contact with the opening arm 5A, and the other in the operating position. It is pivotably supported between a standby position 5B spaced apart from the cassette lid 2C. A switching mechanism 6 is provided for switching the opening arm 5 from the opening posture 5A to the standby posture 5B in relation to the movement of the frame 4. A supporting plate 7 that supports the first axis A1, which is the center, on the base of the VTR, a link 8 that links the supporting plate 7 and the opening arm 5, and an upper part of the link 8 and an intermediate part of the opening arm 5. a second shaft A2 that rotatably connects the link 8;
A third shaft A3 that slidably engages the lower part of the support plate 7 with the horizontal guide groove 9 of the support plate 7, and a protrusion 1 protruding from the support plate 7.
The center ring 11a is loosely fitted into the arm end 11
b is engaged with the third shaft A3 and the other arm end 11c
The torsion spring 11 engaged with the notch 7a of the support plate 7
and a retaining piece 7b formed on the upper part of the support plate 7 so as to come into contact with the direct upper edge of the opening arm 5 in the opening position 5A;
It is composed of a stepped stop edge 7c formed on the left side of the support plate 7 so as to come into contact with the second shaft A2 located at the middle part of the lid opening arm 5 in the standby posture 5B. Although not shown, means is provided for forcibly moving the lid opening arm in relation to the movement of the frame 4 in the operating position direction and the switching point of the lid opening arm. an engaging element protruding from the
It is constituted by an engaged element protruding from the lid opening arm 5.

Next, the operation will be described. The cassette 1 is loaded into the frame 4 at the entrance/exit position, and the conveying device is operated manually or by power. Then, frame 4 begins to move downward. At this time, the tip of the cassette lid 2 in the fully closed position 2A slides on the upper edge of the opening arm 5, which is self-held by a spring 11, in the upwardly inclined opening position 5A, at an angle of approximately 45° (changed to 90°, although not shown). )
At this point, the opening arm 5 continues to open the cassette lid 2 while swinging downward under the swinging force from the frame 4. Then, when the cassette lid 2 is fully opened or just before that, the opening arm 5 separates from the cassette lid 2 and switches to the downwardly inclined standby position 5B. Then, when the cassette lid 2 is automatically fully opened and the cassette 1 reaches the VTR operating position 2C, the VTR is activated at that position.
The frame 4 and the opening arm 5 are stopped after being received by the operating parts, but the frame 4 and the lid opening arm 5 move further downward and then stop. In addition, in the above switching process, frame 4
The downward torque around the first axis A1 transmitted to the opening arm 5 from etc. tries to rotate the link 8 downward around the third axis A3, but the second axis A2 is transmitted to the opening arm 5.
, the third axis A3 moves to the right in the guide groove 9 against the force of the spring 11, and the second and third axes A
2. After A3 reaches the same level, the force of the spring 11 acts to move the second shaft A2 downward from the third shaft A3, so that the second shaft A2 is in standby when it comes into contact with the stop edge 7c. The lid opening arm 5 is self-maintained in the posture 5B.

Further, when loading or unloading the cassette 1, the transport device is operated to move the frame 4 upward. Then, since the opening arm 5 receives an upward movement force from the frame 4, etc., the opening arm 5 moves from the standby position 5B to the spring 1 after the second and third axes A2 and A3 reach the same level.
While being biased by 1 force, it contacts the stopper piece 7b and switches to the open lid position 5A. Further, the frame 4 receives the cassette 1, rises to the loading/unloading position, and stops. When the cassette 1 is taken out at this position, the cassette lid 2 is fully closed by a lid closing mechanism (not shown) built into the frame 4.

Next, a second embodiment of the present invention will be described with reference to FIGS. 3 and 4. This is an embodiment in which an optimal structure as a lid opening arm swinging means is added to the first embodiment. That is, an interlocking rod 12 is provided which is rotatably supported by a fourth shaft A4 protruding from the frame 4, and an elongated guide hole 13 is bored in this interlocking rod 12.
A second shaft A2 is slidably fitted into the support plate 7, and a fifth shaft A5 is provided to protrude from the upper part of the support plate 7. Therefore, in this embodiment, when the frame 4 moves downward, the interlocking rod 12 moves from the solid line position 12A with its guide hole 13 sliding along the second axis A2, so that it moves to the dashed-dotted line position 12B, where it moves from the solid line position 12A. The upper edge 12a of the right end portion contacts the fifth axis A5. Thereafter, the interlocking rod 12 functions as a lever, with the point of contact with the fifth shaft A5 as a fulcrum, the point of contact between the guide hole 13 and the second shaft A2 as a point of action, and the point of contact with the fourth shaft A4 as a point of force. , the force transmitted from the frame 4 acts on the second axis A2, and as a result, the third axis A3 moves to the right in the guide groove 9, so from this point on, the lid opening arm 5 moves from the lid opening position 5A to standby. Start swinging towards posture 5B side. Then, when the interlocking rod 12 reaches the two-dot chain line position 12C,
The lid opening arm 5 assumes a standby position 5B. In this way, the interlocking rod 12 does not come into contact with the cassette 1 at all, so the cassette is not damaged. At this time, the functions of each component other than the interlocking rod are completely the same as in the first embodiment, and therefore the explanation thereof will be omitted.

As is clear from the above description, the present invention includes a loading frame for a cassette with a built-in tape, and a frame conveying device that moves the frame between the cassette loading/unloading position and the equipment operating position where equipment such as a VCR is operated. an opening lid for opening the cassette lid of the cassette loaded in the frame at a predetermined angle by abutting the cassette lid of the cassette loaded in the frame when the frame moves in the equipment operating direction in which the equipment operates; a lid opening arm that is biased in a predetermined angular direction and switches to a standby position in which it waits away from the cassette lid after the cassette lid is opened; and the lid opening arm is connected to the movement of the frame. The device is equipped with a switching mechanism for switching between an open position and a standby position.

Therefore, according to the present invention, the cassette lid is opened by the movement of the frame, and the opening arm can be held completely separated from the cassette lid in the operating position of the cassette, so that the opening arm comes into contact with the cassette lid. It has an excellent effect of preventing damage to the cassette lid without causing damage.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; Fig. 1 is a side view of the first embodiment, Fig. 2 is an exploded perspective view of the same, Fig. 3 is a side view of the second embodiment, and Fig. 4 is an exploded perspective view of the same. FIG. 1...Cassette, 2...Cassette lid, 4...Loading frame, 5...Lid opening arm, 5A...Lid opening posture,
5B...standby posture, 7...support plate, 8...link,
9...Guide groove, 11...Spring, 12...Interlocking rod,
13... Guide hole, A1... First axis, A2... Second axis, A3... Third axis, A4... Fourth axis, A5...
Fifth axis.

Claims (1)

[Scope of utility model registration request] In equipment using a cassette, which is equipped with a frame for loading a cassette with a built-in tape, and a frame conveying device that moves the frame between a cassette loading/unloading position and a device operating position where a device such as a VTR operates, the tape is loaded into the frame. an open position in which the cassette lid of the cassette is brought into contact with the frame and opened at a predetermined angle when the cassette lid is moved in the equipment operation direction in which the equipment of the frame is operated; After the cassette lid is opened, the opening arm switches to a standby position in which the cassette lid waits away from the cassette lid, and the opening arm switches between the opening position and the waiting position in relation to the movement of the frame. An automatic cassette lid opening device comprising a mechanism.