JPH087570Y2 - Disc cartridge with shutter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a disc cartridge with a shutter that accommodates a disc that is a recording medium such as an optical disc or a magnetic disc.

[Conventional technology]

Generally, the magnetic disk or the optical disk is housed in a disk cartridge composed of two upper and lower halves as shown in FIG.

A turntable insertion hole 1 into which a turntable for disc rotation is inserted in the center of the disc cartridge 1
And a head insertion hole 2 into which a read / write head is inserted so as to cross the recording surface of the disk.

A hub provided at the center of the disc is located in the turntable insertion hole 1, and the turntable (not shown) on the recording / reproducing apparatus side is attracted to the hub.

Turntable insertion hole 1 for the disc cartridge
The head insertion hole 2 can be opened and closed by the lateral movement of the shutter 3.

The shutter 3 is bent in the middle to cover the turntable insertion hole 1 and the head insertion hole 2 over the front and back of the disc cartridge, and the front end portion 4 of the shutter 3 for inserting the cartridge into the recording / reproducing apparatus is Slide left and right on the guide part 5 at the front end of the cartridge,
It is designed to open and close 2.

Further, the shutter 3 is provided with a torsion coil spring, and
It is always urged to close 1 and 2.

[Problems to be solved by the device]

However, since the shutter 3 of the conventional disc cartridge is directly attached to the disc cartridge, one end of the torsion coil spring is locked to the shutter 3. Since the shutter 3 is made of a thin metal plate,
The engagement force with the thin end of the torsion coil spring is weak, and the shutter 3
There is a possibility that one end of the torsion coil spring may come off the shutter 3 during the repeated opening and closing operations. Also, the engaging operation is troublesome.

In view of the above point, the present invention aims to provide a disc cartridge in which the torsion coil spring and the shutter 3 can be easily coupled with the opening and closing of the shutter 3 and which is not loosely removed after the coupling. And

[Means for solving the problem]

Therefore, in the present invention, a shutter 10 for opening and closing the holes 8 and 9 formed in the disk cartridge C is slidably attached to the disk cartridge C, and the shutter 10 is formed by the torsion coil spring 23. In the disk cartridge C with a shutter urged in the closing direction of 9 and 9, the shutter 10 is attached to the disk cartridge C via a slider 14, and one end of the slider 14 has a bent end 23a of the torsion coil spring 23. Groove 24 that can fit
Is provided on the lower side, the insertion hole 26 of the bent end 23a of the torsion coil spring 23 is provided in the depth below the eaves portion of the slider 14 so as to be continuous with the concave groove 24, and the insertion Hole 26
In the floor portion, a protrusion 28 for narrowing the opening of the insertion hole 26 to prevent the bent end 23a of the torsion coil spring 23 from coming out and a straight portion near the bent end 23a of the torsion coil spring 23 are inserted. And a bent end portion of the torsion coil spring 23 is provided at a boundary portion between the groove 24 and the insertion hole 26.
The inclined surface 2 that guides 23a from the groove 24 to the insertion hole 26
It adopts the configuration with 5.

[Action]

The bent end portion of the torsion coil spring is guided by the concave groove and the inclined surface of the eave portion of the slider, and is inserted into the insertion hole so as to pass over the protrusion from the opening portion of the insertion hole. Further, at that time, the straight portion near the bent end of the torsion coil spring is inserted into the notch. Therefore, the engagement operation between the torsion coil spring and the slider is simplified and speeded up. Also, the bent end of the torsion coil spring engages with the protrusion after it is inserted into the insertion hole. Therefore, even if the opening / closing operation of the shutter is repeated and the torsion coil spring makes a bending movement, the bent end portion does not drop out of the insertion hole.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 5 and 6, a disc cartridge C for an optical disc is formed by combining an upper half piece 6 and a lower half piece 7, and a turntable insertion hole 8 is formed in the center thereof. The head insertion hole 9 is connected to the turntable insertion hole 8.

A shutter 10 is provided slidably in the left-right direction in order to open and close both the holes 8 and 9.

As shown in FIG. 3, the shutter 10 is formed by folding a single stainless steel plate in two, and includes two vertical plates 11 and 11 facing each other and the tops of the vertical plates 11 and 11. And a top plate 12 formed on the.

At the lower end of the vertical plate 11, a slide portion 13 slidably engaged with a guide plate 30 attached to the wall surface of the disc cartridge C is provided. The top plate 12 of the shutter 10 is fixed by screws 15 and 15 so as to cover the elongated slider 14, and the screws 15 and 15 are screwed into the receiving holes 17 and 17 of the slider 14 through the openings 16 and 16. ing. Also, the top plate 12
An opening / closing pin receiving hole 18 into which the opening / closing pin P ₁ provided on the drive unit side of the recording / reproducing device is inserted is provided in the tail portion of FIG. 4 (FIG. 4). A receiving hole 19 is provided in the slide 14 corresponding to the opening / closing pin receiving hole 18, and a roller r of the opening / closing pin P ₁ as shown in FIG. 4 is engaged in the receiving hole 19.

Guide grooves 20, 20 are provided on both the left and right sides of the slider 14, and the guide grooves 20 are formed on a guide portion G formed at a front end of the recording / reproducing apparatus side of the cartridge C as shown in FIG. It is designed to engage with 21,21.

An inclined surface 22 is provided at the tip of the slider 14 so that the roller r of the opening / closing pin P ₂ on the drive side of the recording / reproducing apparatus can smoothly pass therethrough as shown in FIG. Has become.

When the disc cartridge C is inserted into the recording / reproducing apparatus, one opening / closing pin P ₁ enters into the receiving hole 18 of the shutter 10 and the receiving hole 19 of the slider 14, and as shown in FIG. 10 is moved to the left above the head to open the turntable insertion hole 8 and the head insertion hole 9.
At that time, the other opening / closing pin P ₂ is attached to the inclined surface 22 of the slider 14.
Both pins P ₁ and P ₂ come to cross each other by crossing over there. By providing the inclined surface 22 on the slider 14 in this manner, the unnecessary opening / closing pin P ₂ called a discarding pin is smoothly guided.

On the left side of the front end in the disk cartridge C, there is a fifth
As shown in FIG. 7, FIG. 8 and FIG.
The torsion coil spring 23 is interposed between the inner wall of the disk cartridge C and the slider 14 and the shutter 10 is stored.
Is urged in a direction to close the both holes 8 and 9.

As shown in FIGS. 1 and 2, the slider 14 has the inclined surface 22 on the upper side of the eave portion at one end thereof, and a concave groove 24 is formed on the lower side of the inclined surface 22. An inclined surface 25 is provided on the inner side of the groove 24 in the other end direction of the slider 14, and an insertion hole 26 for the bent end portion 23a of the torsion coil spring 23 is provided further on the inner side of the inclined surface 25. Further, a notch 27 extending in the longitudinal direction of the slider 14 is provided in the floor portion of the insertion hole 26. Further, a projection 28 is provided at the opening of the insertion hole 26 to prevent the bent end 23a of the return coil spring 23 from coming out by narrowing the opening.

In order to store the bent end 23a of the torsion coil spring 23 in the insertion hole 26, as shown in FIGS. 1 and 2, the linear portion near the bent end 23a of the torsion coil spring 23 is notched 27. Insert the bent end 23a into the insertion hole 26 while
You can get over eight. At this time, if the bent end portion 23a is slid along the inclined surface 25, a smooth insertion operation can be performed.

The torsion coil spring 23 repeats the bending operation as shown in FIGS. 7 and 8 with the reciprocating movement of the shutter 10, but the bending end portion 23 a of the torsion coil spring 23 fits inside the insertion hole 26. After that, since it is caught by the protrusion 28, it is difficult to fall out of the slider 14.

In addition, in addition, in FIGS. 5 and 6, what is denoted by reference numeral 29 is a double writing prevention portion provided on the left and right of the rear end in the insertion direction of the recording and reproducing apparatus of the disk cartridge C.

[Effect of device]

According to the present invention, the bent end portion of the torsion coil spring is guided by the concave groove and the inclined surface of the eaves portion of the slider, and is inserted into the insertion hole so as to pass over the protrusion from the opening portion of the insertion hole. The straight part near the bent end of is inserted into the notch. Therefore, there is an effect that the engaging operation between the torsion coil spring and the slider is simple and quick. Also, since the bent end of the torsion coil spring engages with the protrusion after it is inserted into the insertion hole, even if the opening / closing operation of the shutter is repeated and the torsion coil spring bends and expands, the bending end moves out of the insertion hole. As a result, it is difficult to fall off, the proper connection between the torsion coil spring and the slider is maintained, and the closing operation of the shutter is always ensured.

[Brief description of drawings]

1 to 8 show an embodiment of a disk cartridge with a shutter of the present invention, FIG. 1 is a perspective view of one end of a slider, FIG. 2 is a sectional view taken along line II-II in FIG. 3 is an exploded perspective view of the shutter and slider, FIG. 4 is a perspective view showing a guide portion of the disc cartridge together with a part of the shutter, FIG. 5 is a perspective view of the disc cartridge with the shutter closed, and FIG. FIG. 7 is a perspective view of the disc cartridge when the shutter is opened, FIG. 7 is a partially cutaway plan view of a portion of the disc cartridge where the torsion coil spring is attached when the shutter is closed, and FIG. 8 is the same as when the shutter is opened. FIG. 9 is a plan view of a conventional disc cartridge. C ... Disk cartridge, 8, 9 ... Hole, 10 ... Shutter, 14 ... Slider, 23 ... Torsion coil spring, 23a ...
… Bending end, 26 …… insertion hole, 28 …… protrusion.

Claims (1)

[Scope of utility model registration request] 1. A shutter for opening and closing a hole formed in a disc cartridge is slidably attached to the disc cartridge, and the shutter is biased by a torsion coil spring in a closing direction of the hole. In the disk cartridge, the shutter is attached to the disk cartridge via a slider, and an eave portion having a recessed groove on the lower side into which the bent end of the torsion coil spring can enter is provided at one end of the slider. An insertion hole at a bent end of the torsion coil spring is provided in a deep position below the eaves portion so as to be continuous with the recessed groove, and an opening portion of the insertion hole is narrowed in a floor portion of the insertion hole to form the torsion coil spring. A protrusion for preventing the bent end of the coil spring from slipping out and a notch into which a straight portion near the bent end of the torsion coil spring is inserted, and Serial with shutters disc cartridge, wherein the inclined surface is provided at the boundary between the insertion hole for guiding the bent end portion of the torsion coil spring from said groove to said insertion hole.