JPH0734523Y2 - Disk cassette mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in the following order.

A. Industrial fields of use B. Overview of the device C. Conventional technology D. Problems to be solved by the device E. Means for solving the problem F. Action G. Example G ₁ ． Configuration of the embodiment G ₂ . Operation and operation of the embodiment H. Effect of the invention A. Field of industrial application The present invention relates to a mounting device for a disc cassette, and more particularly to a brake mechanism at the time of ejecting the disc cassette.

B. Outline of the Invention The present invention relates to a device for mounting a disc cassette having a cassette holder into which a disc cassette is inserted. A shutter opening / closing lever for pivoting the shutter as the disc cassette is inserted and opening the shutter is provided, and a notch is provided on the front side of the cassette holder, one end of which engages with the shutter opening / closing lever. Is urged in the direction in which the disc cassette is ejected, and the other end is urged so as to face the inside of the cassette holder through the notch, so that the corner portion of the disc cassette when the disc cassette is erroneously inserted into the cassette holder. Since the cassette holder is provided with a torsion coil spring that makes contact with the And the effect return of the lever,
The braking action when ejecting the disc cassette 1
It can be played with two springs.

C. Conventional Technology Conventionally, as a mounting device for this type of disc cassette,
The technique described in Japanese Utility Model Laid-Open No. 62-57955 is known.

In this conventional example, as shown in FIG. 5, a chassis 1 is provided with guide portions 2L and 2R having guide grooves 3L and 3R for vertically guiding a cassette holder, which will be described later, on both left and right sides, and a disc to be described later is provided. A lock lever 4 having a rotation operation pin 5 which is pressed by the cassette is supported rotatably rearward. A torsion spring 6 that urges the lock lever 4 so as to rotate in the clockwise direction is stretched between the chassis 1 and the rotation operation pin 5.

Reference numeral 7 denotes an eject plate attached to the chassis 1 slidably in the directions of arrows A and B, and an eject button 8 is attached to the front. Then, the first cut-and-raised parts 9L and 9R provided with tapered surfaces 9LT (not shown) and 9RT on the left rear side and the right front side, respectively.
Is provided, and the front side on the left side and the rear side on the right side have a tapered surface 10LT.
(Not shown), second cut-and-raised parts 10L and 10R provided with 10RT,
Second cut and raised portions 10L, 10R and guide grooves 12L (not shown), 12R
And the third cut-and-raised parts 11L and 11R that form Further, a pin (not shown) that engages and disengages with the lock lever 4 is provided at the rear end portion, and a first spring 13 that urges the eject plate 7 in the direction of arrow B is stretched between the pin and the chassis 1. There is.

The tapered surfaces 9LT and 10LT and the guide groove 12L (not shown) are configured similarly to the tapered surfaces 9LT and 10LT and the guide groove 12R.

Reference numeral 14 denotes a cassette holder whose left and right sides are U-shaped, and taper surfaces 9LT, 9RT, 10LT, and 1 on the front and rear of the left and right side surfaces.
Guide pin 15L guided by 0RT and entering the guide groove 12L, 12R
F, 15LB, 15RF, 15RB are provided, and a notch 16 is provided on the right front side. And an arc-shaped guide hole on the upper surface
The second spring 19 is provided with a stopper 18 at the rear end thereof and urges the cassette holder 14 downward between itself and the chassis 1.
L and 19R are stretched.

Reference numeral 20 denotes a rotating arm rotatably attached to the right side of the upper surface of the cassette holder 14, and has an abutting portion 21 that enters the cutout portion 16 at one end and a pressed portion 22 at the other end. There is.

Reference numeral 23 denotes a shutter opening / closing lever having a substantially L-shape, one end of which is rotatably attached to the central portion of the upper surface of the cassette holder 14, and which moves in the guide hole 17 and faces the inside of the cassette holder 14. 24 is planted downward, and a pressing piece 25 for pressing the pressed portion 22 is formed at the other end.
Then, the shutter opening / closing lever is connected to the cassette holder 14.
A third spring 26, which urges 23 to rotate clockwise, is tensioned. Therefore, when the pressing piece 25 of the shutter opening / closing lever 23 urged by the third spring 26 abuts against the pressed portion 22 of the rotating arm 20, the rotating arm 20 also rotates in the clockwise direction. The mating portion 21 faces the notch 16 of the cassette holder 14 and abuts the cassette holder 14.

FIG. 6, FIG. 7, FIG. 7A, and FIG. 7B regarding the case where the disc cassette is inserted into the cassette holder 14 of the disc cassette mounting apparatus configured as described above and mounted, and the case where the mounted disc cassette is ejected. This will be described with reference to FIGS. 8A and 8B.

Reference numeral 31 in the drawing denotes a disc cassette, a window portion 32 is provided in the front portion, a tapered surface 33 is formed in the front right corner, and the other corners are substantially orthogonal corner portions 34. Then, a shutter 35 for opening and closing the window 32 is attached, and a disc (floppy disk) 36 is housed inside, and a disc cassette mounting device for inserting and mounting in a cassette holder 14 in the state shown in FIG. Is usually designed.

When the taper surface 33 is located on the right side of the disc cassette 31 as shown by the solid line in FIG. 6, when it is inserted into the cassette holder 14, the taper surface 33 is shown by the chain double-dashed line.
Of the rotary arm 20 and the shutter opening / closing lever 23 is rotated counterclockwise against the urging force of the third spring 26 of the shutter opening / closing lever 23. Disk cassette 31 into the cassette holder 14
Can be inserted inside. The shutter opening / closing pin 24 of the shutter opening / closing lever 23 is connected to the side end portion 35a of the shutter 35.
Abut. When the disk cassette 31 is further pressed in this state, the shutter opening / closing lever 23 further rotates counterclockwise against the urging force of the third spring 26 to open the shutter 35, so that the disk 36 is opened in the window 32. To expose as shown in FIG. 7A. Then, the front end of the disc cassette 31 pushes the rotation operation pin 5 to rotate the lock lever 4 counterclockwise against the biasing force of the torsion spring 6 and abut against the stopper 18. 4 and the pin (not shown) provided on the eject plate 7 are released, and the eject plate 7 moves in the direction of arrow B by the urging force of the first spring 13. Therefore, guide pin 15LF, 1
5LB and 15RB are guided by the tapered surfaces 9LT, 9RT, 10LT, 10RT, and are lowered in the guide grooves 3L, 3R by the urging force of the second springs 19L, 19R, and the disc cassette 31 is in the state of FIG. 7A, B. Is mounted and positioned.

At this time, since the rotating arm 20 and the shutter opening / closing lever 23 are separated from each other, the force of the pressed portion 22 pressing the side surface of the disk cassette 31 is released, and the disk cassette 31 is provided on the chassis 1 in a free state. Positioning pins (not shown) are used to position in the vertical and horizontal directions.

When the disc cassette 31 is inserted into the cassette holder 14 in a state other than the state shown in FIG. 6, that is, when the corner portion 34 of the disc cassette 31 is located on the lower front side in the drawing, the corner portion 34 of the disc cassette 31 rotates. Abutting part of arm 20
Since it abuts against 21, it is possible to prevent erroneous insertion of the disk cassette 31 and prevent damage to a magnetic head (not shown).

When the disc cassette 31 is ejected after recording or reproduction is completed, the eject plate 7 slides against the urging force of the first spring 13 by pressing the eject button 8 in the direction of arrow A, and the lock is performed. It is locked by the lever 4. Then, the guide pins 15LF, 15LB, 15RF, and 15RB are guided by the tapered surfaces 9LT, 9RT, 10LT, 10RT, and the second spring 19
When the shutter opening / closing lever 23 urged by the third spring 26 is rotated clockwise by the upward movement against the urging force of L and 19R, the disc cassette 31 is ejected from the cassette holder 14 and pressed. To press the pressed portion 22 with the piece 25,
The pivot arm 20 pivots clockwise and the abutment portion 21 is cut out 16
It goes inside and presses the side surface of the disc cassette 31. Therefore, the disc cassette 31 is supported by the cassette holder 14 in the state shown in FIGS. 8A and 8B, and the disc cassette 31 can be prevented from falling out of the cassette holder 14.

D. Problem to be Solved by the Invention However, in such a conventional disc cassette mounting apparatus, the shutter opening / closing lever 23 and the rotating arm 20 rotated by the shutter opening / closing lever 23 are provided in the cassette holder 14. Since the disc cassette is prevented from falling off at the time of ejecting, there is a problem that the number of parts is increased and labor is required for assembling / manufacturing.

Further, since the rotating arm 20 is formed by resin molding, the cost is high.

The present invention has been made in view of such conventional problems, and an object of the present invention is to obtain a disk cassette mounting device which can reduce the number of parts and which is low in assembly and manufacturing costs.

E. Means for Solving the Problems Accordingly, the present invention relates to a disc cassette mounting apparatus having a cassette holder into which a disc cassette is inserted, and a shutter of the disc cassette pivotally supported by the cassette holder and inserted at the tip end portion. A shutter opening / closing lever for opening the shutter while pivotally engaging with the insertion of the disc cassette, a notch is provided on the front side of the cassette holder, and one end of the shutter opening / closing lever engages with the shutter opening / closing lever. When the disc cassette is erroneously inserted into the cassette holder, the shutter opening / closing lever is urged in the direction in which the disc cassette is ejected, and the other end is urged to face the inside of the cassette holder through the notch. The solution to this problem is that the cassette holder is provided with a torsion coil spring that comes into contact with the corner of the disc cassette. It is set to.

F. Action One end of the torsion coil spring is engaged with the shutter opening / closing lever and urges the shutter opening / closing lever in the direction in which the disc cassette is ejected. Further, the other end of the torsion coil spring is biased so as to face the inside of the cassette holder through a notch provided on the front side of the cassette holder. Therefore, the other end of the torsion coil spring prevents the disc cassette from being inserted into the cassette holder by coming into contact with the corner portion of the disc cassette when the disc cassette is erroneously inserted into the cassette holder. Further, when the disc cassette is ejected from the cassette holder, the other end of the torsion coil spring has a function of pressing the side portion of the disc cassette and preventing the disc cassette from falling out of the cassette holder.

G. Embodiment Hereinafter, the details of the disc cassette mounting apparatus according to the present invention will be described based on an embodiment shown in the drawings. The same parts as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

G ₁ . Configuration of Embodiment FIG. 1 to FIG. 4B show an embodiment of the present invention.

In the present embodiment, as shown in FIG. 1, a substantially L-shaped shutter opening / closing lever 23 is provided on the upper surface of the cassette holder 14 with its one end pivotally supported. On the lower surface of the other end of the shutter opening / closing lever 23, a shutter opening / closing pin 24 projecting downward is planted. An arcuate guide hole 17 is cut out in the cassette holder 14 so that the shutter opening / closing pin 24 can be moved along with the pivotal movement of the shutter opening / closing lever 23. Further, an engaging piece with which one end of a torsion coil spring described later is engaged with the intermediate portion of the shutter opening / closing lever 23.
23a is standing.

On the other hand, a notch 16 is provided on the front right side of the cassette holder 14.
Are formed. The other end of a torsion coil spring described later engages with the cutout portion 16.

In the figure, 37 is a torsion coil spring (torsion spring), one end 37a of which engages with an engagement piece 23a of the shutter opening / closing lever 23, and the other end 37b of which is bent downward to form the cutout 16
The coil portion 37c at the middle portion is held by the holding member 39 on the upper surface of the cassette holder 14. The torsion coil spring 37 urges the shutter opening / closing lever 23 in the clockwise direction at one end 37a, and urges the other end 37b so as to face the inside of the cassette holder 14 from the cutout portion 16. In the figure, 38 indicates a protrusion that locks the other end 37b of the torsion coil spring 37.

The rest of the configuration of the mounting device of the present embodiment is substantially the same as the above-mentioned conventional example.

G ₂ . Operation / Operation of Embodiment Next, the operation and operation of the disc cassette mounting apparatus will be described.

2, 3 and 4A, 4B, and 4A, 4B, 4C, 4D, 4D, 4E, and 4B for the case of inserting the disk cassette into the cassette holder 14 of the disk cassette mounting apparatus configured as described above, and the case of ejecting the mounted disk cassette. This will be explained with reference to FIGS. 4A and 4B.

In the figure, 31 indicates a disc cassette, and a window is provided on the front part.
32 is provided, a tapered surface 33 is formed at the front right corner, and the other corners are substantially orthogonal corner portions 34. A shutter 35 that opens and closes the window 32 is attached, and a disk (floppy disk) 36 is housed inside and inserted into the cassette holder 14 in the state shown in FIG.
The disc cassette loading device is usually
Is designed.

When the disc cassette 31 is inserted into the cassette holder 14 with the taper surface 33 located on the right side of the drawing as shown by the solid line in FIG. 2, the taper surface 33 is shown at the other end 37b of the torsion coil spring 37 as shown by the chain double-dashed line. Butt and twist coil spring 37
The other end 37b is rotated counterclockwise against the urging force of the disk, and the other end 37b moves to the outside of the cassette holder 14, so that the disc cassette 31 can be inserted into the cassette holder 14. it can. Then, the shutter opening / closing lever 23
The shutter opening / closing pin 24 contacts the side end portion 35a of the shutter 35. When the disc cassette 31 is further pressed in this state, the shutter opening / closing lever 23 rotates counterclockwise against the urging force of the torsion coil spring 37, and the shutter 35 is opened. Expose as shown in FIG. Then, the front end of the disc cassette 31 presses the rotation operation pin 5 to rotate the lock lever 4 counterclockwise against the biasing force of the torsion spring 6 and abut against the stopper 18. 4 and the pin (not shown) provided on the eject plate 7 are released, and the eject plate 7 is moved by the urging force of the first spring 13 to the arrow B
Move in the direction. Therefore, guide pins 15LF, 15LB, 15
RF and 15RB are guided by the tapered surfaces 9LT, 9RT, 10LT, 10RT, and are lowered in the guide grooves 3L, 3R by the urging force of the second springs 19L, 19R, and the disc cassette 31 is in the state of FIG. 3A, B. Is mounted and positioned.

When the disc cassette 31 is inserted into the cassette holder 14 in a state other than the state shown in FIG. 2, that is, when the corner portion 34 of the disc cassette 31 is located on the lower front side in the drawing, the corner portion 34 of the disc cassette 31 is twisted by a coil spring. Since it abuts against the other end portion 37b of the 37, erroneous insertion of the disk cassette 31 can be prevented, and damage to a magnetic head (not shown) or the like can be prevented.

When the disc cassette 31 is ejected after recording or reproduction is completed, the eject plate 7 slides against the urging force of the first spring 13 by pressing the eject button 8 in the direction of arrow A, and the lock is performed. It is locked by the lever 4. Then, the guide pins 15LF, 15LB, 15RF, and 15RB are guided by the tapered surfaces 9LT, 9RT, 10LT, 10RT, and the second spring 19
When the shutter opening / closing lever 23 urged by the torsion coil spring 37 rotates clockwise by ejecting the disc cassette 31 from the cassette holder 14 by rising against the urging force of L and 19R, the torsion coil spring 37 The other end 37b of the disk presses the side surface of the disk cassette 31. Therefore, the disc cassette 31 is supported by the cassette holder 14 in the state shown in FIGS. 4A and 4B, and the disc cassette 31 can be prevented from falling out of the cassette holder 14.

Although the embodiments have been described above, it is needless to say that the present invention can be applied to other types of mounting devices in which the shutter opening / closing lever is substantially provided on the cassette holder, and various design changes can be made. Yes.

H. Effect of the Invention As is apparent from the above description, in the disc cassette mounting apparatus according to the present invention, the returning action of the shutter opening / closing lever of the disc cassette and the braking action when the disc cassette is ejected are It can be played with two torsion coil springs, which has the effect of reducing the number of parts.

Further, since the number of assembling and manufacturing steps is suppressed, there is an effect that the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a disc cassette mounting apparatus according to the present invention, FIG. 2 is a plan view for inserting the cassette of the embodiment, and FIG. 3A is a state in which the cassette of the embodiment is mounted. FIG. 3B is a side view of the same, FIG. 4A is a plan view showing a state where the cassette of the embodiment is ejected,
4B is a side view of the same, FIG. 5 is a perspective view of a conventional example, FIG. 6 is a plan view for inserting a conventional cassette, and FIG. 7A.
Is a plan view showing a state in which a conventional cassette is mounted,
FIG. B is a side view of the same, FIG. 8A is a plan view showing a state in which a conventional cassette is mounted, and FIG. 8B is a side view of the same. 14 ... Cassette holder, 16 ... Notch, 23 ... Shutter opening / closing lever, 23a ... Engagement piece, 37 ... Torsion coil spring, 37a ... One end, 37b ... Other end.

Claims (1)

[Scope of utility model registration request] 1. A disc cassette mounting apparatus having a cassette holder into which a disc cassette is inserted, wherein the disc cassette is inserted by engaging with a shutter of the disc cassette pivotally supported by the cassette holder and inserted at a tip portion thereof. A shutter opening / closing lever for pivotally moving the shutter to open the shutter is provided, and a notch is provided on the front side portion of the cassette holder, one end of which engages with the shutter opening / closing lever so that the shutter opening / closing lever is Twist that is biased in the ejecting direction and biased so that the other end faces the inside of the cassette holder through the notch so that the disc cassette comes into contact with the corner of the disc cassette when the disc cassette is erroneously inserted into the cassette holder. An apparatus for mounting a disk cassette, wherein a coil spring is provided on the cassette holder.