JPH0333965Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention will be explained in the following order.

A. Field of industrial application B. Overview of the invention C. Conventional technology D. Problems to be solved by the invention E. Means for solving the problems F. Effects _G. Examples Figure) G ₂ Explanation regarding the opening/closing drive of the opening/closing lid (Figures 1A to 2D) The present invention relates to a cassette attachment/detachment device in which an opening/closing lid provided at a cassette insertion opening in a front panel is driven to open/close in synchronization with the reciprocating movement of a cassette holder.

B. Overview of the invention This invention consists of a cassette insertion position where the cassette is inserted horizontally facing the cassette insertion slot on the front panel, and a cassette insertion position where the inserted cassette is pulled in horizontally to the rear of the cassette insertion slot and then inserted vertically. The cassette holder has a cassette holder that can be reciprocated between a cassette loading position where the cassette is lowered and installed horizontally, and a rotatable opening/closing lid that opens and closes the cassette insertion opening of the panel from the inside in synchronization with the reciprocating movement of the cassette holder. In a cassette attachment/detachment device configured to be driven to open and close, even if the opening/closing space of the opening/closing lid overlaps the rear end (front panel side) of the cassette attached to the cassette attachment position in the front-rear direction,
When the cassette is moved back from the cassette mounting position to the cassette insertion position by the cassette holder, the opening/closing lid that is driven to open does not interfere with (collide with) the rear end of the cassette.
The length of the entire cassette attachment/detachment device including the opening/closing space for the opening/closing lid can be made extremely small.

C. Prior Art A conventional example of a cassette attaching/detaching device for this type of cassette type VTR will be explained with reference to FIG.

The cassette loading operation in this conventional example is as follows: First, the cassette 1 is horizontally inserted from the direction of arrow a into the cassette holder 4, which has been moved back to the cassette insertion position, from the cassette insertion opening 3 of the front panel 2, as shown by the solid line. The opening/closing lid 5 provided inside the cassette insertion opening 3 is pushed open in the direction of arrow b with the front end 1a of the cassette 1 to be inserted. Next, as shown by the dotted line, pull in the cassette holder 4 horizontally in the direction of arrow c to the cassette retracting position behind the cassette insertion position, and then draw the cassette 1 horizontally into the inside of the front panel 2. The cassette holder 4 is vertically lowered in the direction of arrow d from the cassette retracting position to the cassette mounting position, and the cassette 1 is horizontally mounted at the cassette mounting position from above. While the cassette holder 4 is vertically lowered from the cassette retracting position to the cassette mounting position, the opening/closing lid 5 is driven in the direction of arrow b' to close the cassette insertion opening 3 from the inside.

The cassette ejecting operation in this conventional example is the opposite of the cassette loading operation, and while the cassette holder 4 is vertically raised in the direction of arrow d' from the cassette loading position indicated by the chain line to the cassette retracting position indicated by the dotted line, the opening/closing lid 5 is
from the closed lid position (dashed line) to the open lid position (solid line) using arrow b.
Then, the cassette holder 4 is horizontally moved back in the direction of arrow c' from the retracted position indicated by the dotted line to the cassette insertion position indicated by the solid line.

D Problems to be solved by the invention In this conventional example, when the cassette 1 is moved back from the cassette mounting position to the cassette insertion position in the directions of arrows d' and c', the lid is opened in the direction of arrow b. In order to prevent the driven opening/closing lid 5 from interfering with (colliding with) the rear end 1b of the cassette 1, the opening/closing space _S1 of the opening/closing lid 5 is connected to the rear end 1b of the cassette 1 installed at the cassette mounting position as shown by the chain line. It was installed at a position sufficiently far away from the front side (front panel side). For this reason, in this conventional example, the longitudinal length _l1 of the entire cassette attachment/detachment device including the opening/closing space _S1 of the opening/closing lid 5 is extremely long, and the cassette type
It was not possible to reduce the front-to-back length of the VTR.

With the present invention, even if the opening/closing space of the opening/closing lid overlaps the rear end (front panel side) of the cassette mounted at the cassette mounting position in the front-rear direction, the cassette holder allows the cassette to be removed from the cassette mounting position. The opening/closing lid that is driven to open does not interfere with (collide with) the rear end of the cassette when the cassette is moved back to the insertion position.

E. Means for Solving the Problems The present invention provides the above-mentioned cassette attachment/detachment device that moves the opening/closing lid between the closed lid position and the open lid position by rotating the opening/closing lid between the backward movement position and the forward movement position. and a first spring that biases the opening/closing lid from the open lid position to the closed lid position by rotationally biasing the first lever from the forward movement position to the backward movement position. The rotation from the forward position to the forward position rotates the first lever from the forward position to the forward position against the first spring, while the rotation from the forward position to the forward position rotates the first lever against the first spring. the first lever.
a second lever that is rotated from the forward position to the backward position by a spring; and a spring stronger than the first spring that biases the second lever to rotate from the forward position to the backward position. a second spring, which is provided on the cassette holder so that when the cassette holder is moved back to the cassette insertion position, the second spring is attached to the cassette holder;
a first contact portion that contacts the lever and rotates the second lever from the backward movement position to the forward movement position against the second spring; a second contact portion that contacts the second lever when the cassette is moved forward to the forward position and rotates the second lever from the backward movement position to the forward movement position against the second spring; The holder is moved back from the cassette mounting position to the cassette insertion position by being slightly raised from the cassette mounting position, thereby separating the second abutting portion from the second lever, and during this time, the second contact portion is moved away from the second lever.
The second lever is instantly rotated by a spring from the forward movement position to the backward movement position, and the opening/closing lid is instantly driven to open from the closed position to the open position.

F Function The present invention allows the opening/closing lid to be opened and closed instantly by slightly raising the cassette holder from the cassette mounting position to return to the cassette insertion position. , the rear end (front panel side) of the cassette installed in the opening/closing space of the opening/closing lid.
Even if the cassette is overlapped in the front and back direction, when the cassette is moved back from the cassette mounting position to the cassette insertion position by the cassette holder, the opening/closing lid that is driven to open will interfere with (collide with) the rear end of the cassette. do not.

G. Embodiment Hereinafter, an embodiment in which the present invention is applied to a cassette attaching/detaching device for a front loading type cassette type VTR will be described with reference to FIGS. 1A to 3. Note that the same reference numerals are given to the same structural parts as those of the conventional example explained in FIG.

_G1 First, the attachment and detachment of the cassette will be explained with reference to FIGS. 1A to 3.

First, as shown in FIG. 3, a cassette holder 4 into which the cassette 1 is inserted horizontally from the cassette insertion opening 3 of the front panel 2 is vertically fixed on a horizontal chassis 7, and the left and right sides of the cassette holder 4 are fixed vertically on a horizontal chassis 7. It is supported in a left-right symmetrical state by a pair of left and right holder support plates 8 arranged at certain positions.

That is, three guide rollers 9 rotatably attached to both the left and right sides of the cassette holder 4 via guide pins are loosely fitted into three guide grooves 10 provided in the left and right holder support plates 8, respectively. .
These guide grooves 10 are formed into a substantially L-shape by a horizontal groove portion 10a and a vertical groove portion 10b connected to the rear end. Therefore, due to the guiding action of these guide rollers 9 and guide grooves 10, the cassette holder 4 is moved to the cassette insertion position where the cassette 1 is inserted, as shown in solid lines in FIGS. 1A and 2A, and as shown in FIGS. 1D and 2D. The inserted cassette 1 shown in FIG. 1 is supported so as to be able to reciprocate along a substantially L-shaped locus of movement between a cassette mounting position and a reel stand and a cassette positioning pin (none of which are shown). There is.

Next, as shown in FIG. 3, a drive arm 13 and a drive gear 14 are respectively attached to rotation center shafts 12 provided on the outside of both left and right holder support plates 4 so as to be relatively rotatable. and the drive gear 14 are coupled via a limiter spring 15. And a long hole 16 provided in the drive arm 13
One guide roller 9a is loosely fitted therein, and the drive gear 14 is the final gear 19 of a gear train 19 having a worm gear 18 driven by a motor 17 mounted on the chassis 7 as shown in FIG.
It is configured to be driven to rotate in forward and reverse directions by a.

When the cassette 1 is inserted horizontally in the direction of arrow a from the cassette insertion opening 3 into the cassette holder 4 which has been moved back to the cassette insertion position as shown by the solid line in FIGS. 1A and 2A, the motor 17 is activated. The gear train 19 rotates the drive arm 13 via the drive gear 14 in the direction of arrow e in FIG. Then, the guide roller 9a is driven by the drive arm 13 through the elongated hole 16, and the cassette holder 4 is pulled horizontally in the direction of arrow c from the cassette insertion position to the cassette retraction position shown by the chain line in FIGS. 1A and 2A. After pulling the cassette 1 horizontally into the inside of the front panel 2,
The cassette holder 4 is vertically lowered in the direction of arrow d from its cassette retracted position to the cassette mounting position shown in FIGS. 1D and 2D, and the cassette 1 is horizontally mounted at the cassette mounting position from above.

Note that the cassette ejecting operation is the opposite of the cassette loading operation, and the drive arm 13 is moved in the direction shown by the arrow in FIG.
When rotated in the direction e', the cassette holder 4 is vertically raised in the direction of arrow d' from the cassette mounting position shown in Figures 1D and 2D to the cassette retracting position indicated by the chain line in Figures 1A and 2A. Then, follow the arrows to the solid line cassette insertion position in Figures 1A and 2A.
It is moved back horizontally in the c′ direction.

_G2 Next, the opening/closing drive of the opening/closing lid 5 will be explained with reference to FIGS. 1A to 2D.

First, the opening/closing lid 5 is rotatably mounted between the left and right holder support plates 8 in the directions of arrows b and b' by a pair of right and left fulcrum shafts 21 provided at the upper ends of both ends in the left and right direction. Next, inside the holder support plate 8 located on the right side in FIG. ，
25 so as to be rotatable in the directions of arrows f and f', and in the directions of arrows g and g', respectively. And these first
The lever 22 and the second lever 23 are connected to the holder support plate 8
The first spring 26 and the second spring 2 installed between
7, they are biased backward in the directions of arrows f and g, respectively. Note that the second spring 27 is configured to be stronger than the first spring 26. Next, the first lever 2
2 is formed in the shape of a box, and one end of the 2
A partial gear 28 centered on a fulcrum shaft 24 provided at 2a is meshed with a partial gear 29 formed on the outer periphery of one fulcrum shaft 21 of the opening/closing lid 5. next,
The second lever 23 is substantially T-shaped and is provided with three arms 23a, 23b, and 23c. Next, one of the three guide rollers 9 9a is configured as a second contact portion to be described later,
Another one 9b is configured as a first contact portion which will be described later.

Next, the opening/closing operation of the opening/closing lid 5 by the cassette attaching/detaching device constructed as above will be explained.

First, before inserting the cassette, the first abutting portion 9b of the cassette holder 4, which has been moved back to the cassette inserting position, abuts the arm 23a of the second lever 23 from the direction of arrow c' as shown by the solid line in FIG. 1A. The second lever 23 is rotated in the direction of arrow g' against the strong second spring 27 to the forward movement position. As a result, the first lever 22 is rotationally driven in the direction of arrow f by the weak first spring 26 to the backward movement position shown by the solid line in FIG. 1A, and the partial gears 28, 2
9, the opening/closing lid 5 is driven to close in the direction of arrow b' to the closing position shown by the solid line in FIG. 2A, and the opening/closing lid 5 closes the cassette insertion slot 3 from the inside. Note that when the second lever 23 is rotated to the backward movement position, the first lever 22 moves in the direction indicated by the arrow f, between the backward movement position indicated by the solid line and the forward movement position indicated by the chain line in FIG. 1A.
It can be freely rotated in the f′ direction.

Therefore, as shown by the chain line in FIG. 2A, the cassette 1
When the cassette holder 4 is horizontally inserted from the cassette insertion opening 3 into the cassette holder 4 in the direction of arrow a, the front end 1a of the inserted cassette 1 pushes the opening/closing lid 5, and the opening/closing lid 5 resists the first spring 26. The cover is pushed open in the direction of arrow b from the closed position shown by the solid line to the open position shown by the chain line in FIG. 2A.

Next, after the cassette is inserted, the cassette mounting operation described above is performed, and at this time, when the cassette holder 4 is slightly horizontally moved in the direction of arrow c from the cassette insertion position, the cassette holder 4 is moved as shown in FIG. 1B. The first contact portion 9b of the second lever 23 is separated from the arm 23a of the second lever 23 in the direction of the arrow c, and during this time the second lever 23 is instantaneously rotated in the direction of the arrow g to the return position by the strong second spring 27. be done.
Then, the arm 23b of this second lever 23
The first lever 22 is brought into contact with the other end 22b of the lever 22 from the direction of the arrow g, and is rotated in the direction of the arrow f' against the weak first spring 26 to the forward position. The opening/closing lid 5 is completely driven in the direction of arrow b to the opening position shown in FIG. 2B, and the opening/closing lid 5 is completely separated above the cassette 1.

Next, as described above, after the cassette holder 4 is pulled in horizontally in the direction of arrow c to the cassette retracting position, it is lowered vertically in the direction of arrow d and moved forward to the cassette mounting position, as shown in FIG. 1D. As shown, the second contact portion 9a of the cassette holder 4 is connected to the second lever 2.
3 from the direction of arrow d, and rotates this second lever 23 against the strong spring 27 again to the forward movement position in the direction of arrow g'. Then, the first lever 22 is rotated again in the direction of the arrow f by the weak first spring 26 to the return position, and the opening/closing lid 5 is rotated to the closing position as shown in FIG. 2D via the partial gears 28 and 29. The lid is driven to close in the b' direction, and the opening/closing lid 5 closes the cassette insertion opening 3 again from the inside.

Next, during the above-described cassette ejection operation, when the cassette holder 4 is slightly raised from the cassette mounting position in the direction of the arrow d', the second abutting portion 9a of the cassette holder 4 is pressed against the second lever as shown in FIG. 1C. separated from the arm 23c of 23 in the direction of arrow d',
During this time, the second lever 23 is instantaneously rotated in the direction of arrow g by the strong spring 27 to the return position. Then, the arm 23b of the second lever 23 comes into contact with the other end 22b of the first lever 22 from the direction of arrow g, and instantaneously moves the first lever 22 in the direction of arrow f' against the weak spring 26 to the forward position. The opening/closing lid 5 is rotated through the partial gears 28 and 29 to the fifth position.
In Fig. C, the lid is opened instantly in the direction of arrow b from the closed lid position indicated by the chain line to the opened position indicated by the solid line.

When the cassette holder 4 is returned to the cassette insertion position as shown in FIG. 1A, the rear end 1b of the cassette 1 is projected out of the cassette insertion slot 3 as shown by the chain line in FIG. Gotoku 1
The second lever 23 is rotationally driven to the forward position by the contact portion 9b, and the first lever 22 is free to rotate. Therefore, after the cassette holder 4 moves back,
When the cassette 1 is pulled out of the cassette insertion slot 3 in the direction of arrow a' in FIG. 2A, the opening/closing lid 5 is driven to close by the first spring 26 in the direction of arrow b' in FIG. 2A.

According to this cassette attachment/detachment device that drives the opening/closing lid 5 to open and close as described above, the cassette holder 4 is moved back from the cassette loading position to the cassette insertion position by moving from the cassette loading position to the arrow
By being slightly raised in the direction d', the opening/closing lid 5 can be instantly driven to open in the direction of the arrow b from the closed position to the open position by the strong second spring 27.

Therefore, as shown in FIG. 2C, even if the opening/closing space _S1 of the opening/closing lid 5 is made to overlap the rear end 1b of the cassette 1 mounted at the cassette mounting position _S2 in the front-rear direction, the cassette holder 4 will Therefore, when the cassette 1 is moved back from the cassette mounting position to the cassette insertion position, the opening/closing lid 5 that is driven to open can be constructed so as not to interfere with (collide with) the rear end 1b of the cassette 1.

As a result, the longitudinal length _l2 of the entire cassette attaching/detaching device can be made shorter than the longitudinal length _l1 of the entire conventional cassette attaching/detaching device shown in FIG. 4 by an amount corresponding to the overlap _S2 .

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and various effective changes can be made based on the technical idea of the present invention.

Furthermore, the present invention is not limited to the cassette attachment/detachment device of a cassette type VTR, but can be applied to various cassette attachment/detachment devices of various other cassette type recording/reproducing devices, information processing devices, etc.

H. Effects of the invention The present invention allows the opening and closing space of the opening/closing lid to overlap the rear end (front panel side) of the cassette installed in the cassette mounting position in the front-rear direction. When moving back from the installation position to the cassette insertion position, the opening/closing lid that is driven to open does not interfere with (collide with) the rear end of the cassette, so the entire cassette loading/unloading device moves forward and backward by the amount of overlap described above. The length can be made shorter than the front-to-back length of the entire conventional cassette attachment/detachment device. Therefore, there is an advantage that the front-to-back length of a cassette-type VTR or the like in which this cassette attaching/detaching device is incorporated can be greatly reduced.

[Brief explanation of drawings]

Figures 1A to 3 show an embodiment of the present invention, and Figures 1A to 1D also illustrate the operation in Figure 3 - arrow view, and Figures 2A to 2D. FIG. 3 is a view in the direction of arrows for explaining the operation, and FIG. 3 is a perspective view of the entire device. FIG. 4 is a schematic diagram showing a conventional example. In addition, in the symbols used in the drawings, 1...Cassette, 2...Front panel, 3...Cassette insertion slot, 4...Cassette holder, 5...Opening/closing lid, 9a
...Second contact part, 9b...First contact part, 21...
Fulcrum shaft, 22...first lever, 23...second lever, 24...fulcrum shaft, 25...fulcrum shaft, 26...
The first spring, 27... is the second spring.

Claims (1)

[Scope of claim for utility model registration] A cassette insertion position where the cassette is horizontally inserted facing the cassette insertion slot on the front panel, and a vertical position after the inserted cassette is pulled horizontally to the rear of the cassette insertion slot. The cassette holder has a cassette holder that can reciprocate between a cassette mounting position where the cassette is lowered and installed horizontally, and a rotatable opening/closing lid that opens and closes the cassette insertion opening of the panel from the inside in synchronization with the reciprocating movement of the cassette holder. In the cassette attachment/detachment device configured to be driven to open and close, the cassette attachment/detachment device includes: a first lever that drives the opening/closing lid between a closed lid position and an open lid position by rotating between a backward movement position and a forward movement position; and a first spring that biases the opening/closing lid from the open-cover position to the closed-cover position by rotationally biasing the first lever from the forward-moving position to the backward-moving position, and from the forward-moving position to the backward-moving position. The first
While the lever is rotationally driven from the backward movement position to the forward movement position against the first spring, the first lever is rotated from the forward movement position by the first spring due to the rotation from the backward movement position to the forward movement position. a second lever that rotates the lever to the forward movement position; and a second spring configured of a spring stronger than the first spring that rotationally biases the second lever from the forward movement position to the return movement position; It is provided in the cassette holder, and when the cassette holder is moved back to the cassette insertion position, it comes into contact with the second lever and moves the second lever from the backward movement position to the forward movement position against the second spring. a first abutting portion that is rotatably driven; and a first abutting portion provided on the cassette holder, which abuts the second lever when the cassette holder is moved forward to the cassette mounting position and causes the second lever to engage the second spring. and a second abutting portion which is rotationally driven from the backward movement position to the forward movement position, and the cassette holder is slightly raised from the cassette installation position in order to be moved back from the cassette installation position to the cassette insertion position. The second contact portion is separated from the second lever by the second spring, and during this time, the second lever is instantly rotated from the forward position to the backward position by the second spring, and the opening/closing lid is closed. A cassette attachment/detachment device characterized in that it is configured to instantaneously drive a lid open from a position to an open position.