JP2558801B2 - Disk cartridge - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for a recording / reproducing apparatus for recording, reproducing or erasing information on a disc-shaped disc, for example, a disc is housed inside like a floppy disc or an optical disc. It relates to a disk cartridge.

2. Description of the Related Art As a conventional disk cartridge, for example,
There is one such as shown in Japanese Patent No. 61-236083.

FIG. 5 is an external perspective view of this conventional disk cartridge. FIG. 6 is a perspective view of the internal structure of the conventional disk cartridge.

Reference numeral 31 denotes a disk, and a driving hole 31a is formed in the center of the disk so as to engage with a rotary driver for driving the disk 31 to rotate. Numeral 32 denotes a disk cartridge housing which houses the disk 31 rotatably. The disk cartridge housing 32 is formed by an upper half 33a and a lower half 33b.

Center halves 34a and 34b for inserting a rotational driving body (not shown) and a head (not shown) for recording, reproducing or erasing information are inserted into the upper half 32a and the lower half 33b. Hole-shaped head insertion holes 35a and 35b and concave portions 36a and 36b into which a shutter described later can be inserted are provided so as to face each other.

A shutter 39 closes the center holes 34a and 34b and the head insertion holes 35a and 35b. Reference numeral 40 denotes a projection formed by bending a part of the shutter 39 inward, and a guide groove.
It is inserted into 37 and moves in the groove 37 to guide the shutter 39. Reference numeral 41 is a claw formed by bending a part of the shutter 39 inward, and is configured to be insertable into an elongated opening 38 formed when the upper half 33a and the lower half 33b are overlapped. .

42 is a slider, which is inside the shutter 39 and
The shutter 39 is moved to a position where it is closed or opened with respect to the center holes 34a and 34b and the head insertion holes 35a and 35b by moving inside the disk cartridge housing 32. slider
A claw 41 of the shutter 39 is inserted in the center of the shutter 42, and an engaging hole 43 for coupling the shutter 39 and a protrusion 44 for moving the slider 42 by engaging with an external member (not shown). And are provided. A tension spring 45 is locked at the center of the slider 42. When the engagement between the external member and the projection 44 is released, the slider 42 is moved in the direction of arrow H by the urging force of the tension spring 45.

That is, when the slider 42 is moved in the arrow G direction by an external member, the shutter 39 moves in the arrow E direction in conjunction with the movement of the slider 42, and thus the center hole 34.
The a / 34b and the head insertion holes 35a and 35b are opened to enable the insertion of the rotary drive body and the head described above.

When the slider 42 is disengaged from the external member, the shutter 39 is pulled in the direction of the arrow F by the urging force of the shutter 45, and the center holes 34a and 34b and the head insertion holes 35a and 3a.
Block 5b.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-described structure, the upper half 33a is more conventional than the conventional one.
The lower half 33b is generally formed by injection molding a resin, and the shutter 39 is made of metal and is made of an elastic body such as a leaf spring having a thickness of 0.2 mm to 0.3 mm. Therefore, when the projection piece 40 of the shutter 39 moves in the groove 37, a catch is generated, which causes a problem that the shutter 39 cannot be moved smoothly.

Therefore, a method has been proposed in which a slider is partially rail-shaped to increase rigidity, and the rail-shaped slider also serves as a guide for the movement of the shutter, but it is not easy to assemble and disassemble between the slider and the shutter, and ,
It was very difficult to securely fix the shutter to the slider so that there was little backlash.

In view of such a point, the present invention allows the shutter to be moved smoothly, and the shutter to be incorporated,
An object of the present invention is to provide a disk cartridge which can be easily disassembled and can be securely fixed.

Means for Solving the Problems According to the present invention, a slider and a shutter constitute a moving portion of a shutter, and an elastic portion having a projection for positioning the shutter and preventing slippage, and a guide groove for positioning the shutter are provided on the slider. The shutter is provided with a claw that engages with the guide groove of the slider, and the shutter is engaged with and held by the slider by the elastic portion having the protrusion and the guide groove.

Effect of the Invention With the above-described structure, the present invention makes it easy to assemble and disassemble the shutter by engaging and holding the shutter with the elastic portion having the projection and the guide groove in the linking portion between the slider and the shutter. , The shutter can be fixed securely.

Embodiment FIG. 1 shows an exploded perspective view of a disk cartridge according to an embodiment of the present invention. FIG. 2 is a perspective view of the connecting portion between the slider and the shutter. Similarly, FIG. 3 shows a perspective view of a connecting portion between the slider and the slide band. FIG. 4 is a perspective view of the outer appearance of the disk cartridge.

Reference numeral 1 denotes a disk, and a drive hole 1a that engages with a rotary drive body (not shown) for rotationally driving the disk 1 is formed in the central portion.

Reference numeral 2 denotes a disk cartridge housing which houses the disk 1 rotatably. The disk cartridge housing 2 is formed by an upper half 3a and a lower half 3b. The upper half 3a and the lower half 3b are formed, for example, by injection molding a polyacetal resin or the like. Center holes 4a and 4b for inserting a rotation driving member in the upper half 3a and the lower half 3b, and a head for recording, reproducing or erasing information (not shown)
Slot-shaped head insertion holes 5a and 5b into which is inserted and concave portions 6a and 6b into which a shutter described later can be inserted are provided to face each other. Also, the upper half 3a and the lower half 3b have screws 24
Fixed by.

A shutter 11 closes the center holes 4a and 4b and the head insertion holes 5a and 5b. Shutter 11 is made of metal and is thick
It consists of an elastic body such as a leaf spring of 0.2 mm to 0.3 mm.

Reference numeral 12 denotes a slider, and the groove portion 13 is engaged with and guided by a convex guide portion 14 of the lower half 3b (the upper half 3a also has a convex guide portion at a position opposed thereto). The elastic portion 25 has a protrusion 18. The slider 12 is made, for example, by injection molding a polyacetal resin or the like. Therefore, the elastic portion 25 has a structure that is elastically movable in the arrow I and arrow J directions. The protrusion 18 is provided for positioning the shutter 11, and in the embodiment shown in FIGS. 1 and 2, it is a circular protrusion, but the present invention is not limited to this.

Since the elastic portion 25 is elastically configured, the protrusion 18
And the shutter 11 can be disengaged. Further, the slider 12 is provided with a guide groove portion 16, and the guide groove portion 16 and the claw 15 formed by bending a part of the shutter 11 inward are engaged with each other. The elastic part 25 is a shutter.
11 can be configured so as to be always biased in the direction of arrow J. This is the guide groove 16 of the slider 12 and the shutter.
Slider 12 and shutter in engagement with 11 claws 15
The gap with 11 is eliminated by the elastic force of the elastic portion 25.

When the shutter 11 is incorporated in the slider 12, it suffices to push the shutter 11 in the direction of arrow I and insert it. At this time, until the claw 15 reaches the position where it engages with the guide groove portion 16,
A notch 26 is provided so that 15 expands elastically.

When disassembling the shutter 11 from the slider 12,
18 is pushed in the direction of the arrow I to bend the elastic portion 25 to disengage the projection 18 from the hole 17 of the shutter, and the shutter 11 is moved in the direction of the arrow K to move the claw 15 of the shutter 11 and the slider.
After the engagement of the guide grooves 16 of 12 is released, the shutter 11 is moved in the direction of arrow J and removed.

Reference numeral 19 is a slide band that is thin and easy to bend. A protrusion 22 for moving the slide band 19 is engaged with an external member (not shown) at the other end of the slide band 19.
Is provided. A tension spring 23 is locked at the center of the slider 12, and when the external member is disengaged from the protrusion 17, the slider 12 is moved in the direction of arrow D by the urging force of the tension spring 23. That is, when the slide band 19 is moved in the arrow C direction by an external member, the shutter 11 moves in the arrow A direction in conjunction with the movement of the slider 12, and the center holes 4a, 4b and the head insertion holes 5a.
5b is opened to allow the insertion of the rotary drive body and the head described above. When the slide band 19 is disengaged from the external member, the shutter 11 is pulled in the direction of the arrow B by the urging force of the tension spring 23, and the center holes 4a and 4b and the head insertion hole 5a.
・ Close 5b.

Although the slider 12 and the slide band 19 can be integrally configured,
In manufacturing, in this embodiment, as shown in FIG. 3, a cylindrical convex portion 20 is formed at one end of the slide band 19, a cylindrical concave portion 21 is provided in the slider 12, and a relationship between the cylindrical convex portion 20 and the cylindrical concave portion 21 is provided. The slider 12 and the slide band 19 are connected together.

FIG. 7 shows another embodiment. Those having the same functions as those shown in FIG. 2 have the same numbers and a is added to the end. The different points will be mainly explained. The slider 12a is provided with two elastic portions 25a having protrusions 18a. Elastic part 25
By providing a in two places, a more stable state can be achieved against eliminating the above-mentioned gap between the slider 12a and the shutter 11a.

The positioning of the shutter 11a can be performed at the end of the shutter 11a without using the hole 17 of the shutter 11 as shown in FIG. 2, and the shutter 11a can have a simpler shape. When the shutter 11a is disassembled from the slider 12a, the protrusion 18a on the right side in FIG. 2 is pushed in the direction of arrow I to release the engagement between the protrusion 18a and the shutter 11a.

As described above, according to the present invention, the shutter and the slider can be easily assembled and disassembled, the shutter and the slider can be surely connected, and the shutter can be moved smoothly.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a disk cartridge according to an embodiment of the present invention, FIG. 2 is a perspective view of a connecting portion between the slider and a shutter, and FIG. 3 is a perspective view of a connecting portion between the slider and a slide band. FIG. 4 is an external perspective view of the disc cartridge, FIG. 5 is an external perspective view of a conventional disc cartridge, FIG. 6 is a perspective view of the internal structure of the conventional disc cartridge, and FIG. 7 is a slider and a shutter. It is a perspective view of the 2nd Example of the connection part with. 1 ... Disc, 2 ... Disc cartridge housing, 11
...... Shutter, 12 ...... Slider, 15 ...... Nail, 16 ......
Guide groove, 17 …… hole, 18 …… projection, 19 …… slide band,
25: Elastic part.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akifumi Nakata 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Takuji Nakano, 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Within the corporation

Claims (1)

(57) [Claims] 1. A center hole having an upper half and a lower half for rotatably accommodating a disk therein, into which a rotary drive for rotating the disk is inserted, and information is recorded / reproduced on / from the disk. Alternatively, the cartridge housing has a head insertion hole into which a head for erasing is inserted, and the cartridge housing is movably mounted on the outer surface of the cartridge housing to close the center hole and the head insertion hole. A shutter, a slider that engages with the shutter and guides the shutter to a position where the shutter is opened and a position where it is closed with respect to the center hole and the head insertion hole, one end is inside the cartridge housing, and the other end is the slider. , Elastic members that are respectively locked to bias the slider in a direction to close the center hole and the head insertion hole. The slider is provided with an elastic portion having a projection for positioning and preventing the shutter from coming off and a guide groove for positioning the shutter, and the shutter has a pawl that engages with the guide groove of the slider. A disk cartridge, wherein the shutter is engaged with and held by the slider by an elastic portion having the protrusion and the guide groove.