JP2595375Y2 - Disk cartridge - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge containing a disk-shaped recording medium, and more particularly to a disk cartridge for 3.5 inches.

[0002]

2. Description of the Related Art A disc-shaped recording medium used in a recording / reproducing apparatus is housed in a disc cartridge in order to prevent the disc-shaped recording medium from being damaged when not in use and from adhering dust. Is protected by Such disk cartridges include, for example, those shown in FIGS. In FIG.
Reference numeral 101 denotes a case, in which a disk-shaped recording medium (not shown) is stored. A rotation hole (not shown) for rotating the disk-shaped recording medium and a head insertion hole for accessing the head for reading and writing information when the disk cartridge is mounted on the recording / reproducing apparatus are provided in the case 101. (Not shown) are formed.

Here, in order to prevent dust from entering the inside of the case 101 from the rotation hole or the head insertion hole,
In this case 101, as shown in FIG.
2 are installed. The shutter 102 has a pair of opening and closing plate portions 103 and 104 formed by being bent substantially from the center, and a guide plate portion 105 for slidably guiding the shutter 102 is formed substantially at the center. The shutter 102 is constantly urged by a torsion coil spring (not shown) housed in the case 101 to close the rotation hole and the head insertion hole.

When the shutter 102 is slid against the urging force of the torsion coil spring, the rotation hole and the head insertion hole are opened. In order to prevent the shutter 102 from coming off the case 101 and to guide the shutter 102 in the opening / closing direction when the shutter 102 is opened and closed, as shown in FIG.
105b is formed. Guide protrusions 105a, 1
05b is fitted into guide grooves 106a and 106b formed on one side of the case 101 in the sliding direction.

[0005]

However, in such a conventional disk cartridge, the metal shutter 102 is in direct sliding contact with the case 101, and the metal guide projections 10 are formed in the guide grooves 106a and 106b.
5a and 105b are fitted, the shutter 10
2 is difficult to slide smoothly with respect to the case 101.

[0006]

A disk cartridge according to the present invention comprises a case (1) containing a disk-shaped recording medium (2), a head insertion hole (3) formed in the case, and a disk. A shutter (5) attached to the case for opening and closing a rotation hole (4) for rotating the recording medium, and formed by bending a thin sheet into a substantially U-shaped cross section; provided, comprising a slider (15) in contact with the casing so as to slide open and close direction of the shutter, the slider (15), projecting from the mounting position of the shutter (5) in the closing direction of the shutter A protrusion (15b) that slides on the guide surface (11) of the slider provided in the case (1) is provided at the tip of the protrusion. Is formed, the end portions of the slider (15), projections for projection engages inside the case (1) enters the inside of the front Symbol Case (1) (21, 22) is provided, said shutter (2)
2) The shutter is more closed than the protrusion (15b).
It extends in the direction.

[0007]

When the disk cartridge of the present invention is mounted on a recording / reproducing apparatus, an opening / closing pin of the apparatus pushes and slides a shutter to open the rotation hole and the head insertion hole. At this time, the shutter is not in direct sliding contact with the case, but is in sliding contact with the case via the slider.
Therefore, the shutter can be slid smoothly with respect to the case.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

FIGS. 1 to 7 show an embodiment of a disk cartridge for 3.5 inches according to the present invention.

In FIGS. 1 and 2, reference numeral 1 denotes a disk cartridge case, which is made of a synthetic resin and has an upper half 1a and a lower half 1b which are entirely rectangular and have a flat plate shape. . The case 1 houses a 3.5-inch optical disk 2 (disk-shaped recording medium) on which optical information is recorded. In the center of the lower half 1b of the case 1, when the optical disc is mounted on the recording / reproducing apparatus,
A rotation hole 4 for rotating the optical disk 2 in the case 1 by a spindle motor (not shown) is formed, and a hub portion 2 a provided at the center of the optical disk 2 is exposed from the rotation hole 4. Also, the upper and lower halves 1a of the case 1
1b, a head insertion hole 3 is formed so that an optical head (not shown) for reading information recorded on the optical disk 2 can be approached.

When the optical disk 2 is not used, a shutter 5 is provided on the case 1 in order to prevent dust from entering the case 1 through the rotation hole 4 and the head insertion hole 3.
Is installed. As shown in FIG. 3, the shutter 5 is formed by bending a thin metal plate of stainless steel or the like into a substantially U-shape from substantially the center, and has an opening / closing plate portion 6 for opening and closing the rotary hole 4 and the head insertion hole 3. An auxiliary opening / closing plate portion 7 having a shorter bending length than the opening / closing plate portion 6 is provided. Also,
A guide plate portion 8 is formed at the bent portion of the shutter 5 (upper portion in the figure) at the end of the case 1 on the recording / reproducing device insertion side.

Here, the guide portion G formed at the leading end of the case 1 in which the recording / reproducing device is inserted is formed on the left side in FIG. And a second guide surface 12 formed on the opposite side of the head insertion hole 3 from the first guide surface 11. And
A connecting portion 13 is formed between the two guide surfaces 11 and 12.

An opening and closing pin P for opening and closing the shutter 5 is provided on the side of the first guide surface 11 on the side of the head insertion hole 3 so as to fall when the shutter 5 is opened.
Are formed. Thus, when the head insertion hole 3 is opened, the opening / closing pin P falls into the escape recess 14.

A slider 15 made of a synthetic resin such as polycarbonate, which slides on the guide portion G, is attached to the inner surface of the guide plate portion 8 having a substantially U-shaped cross section. That is,
A substantially mortar-shaped first dent 25 is formed on the front side (upper side in FIG. 4) of the slider 15, and a substantially mortar-shaped second dent 26 that can be fitted into the first dent 25 is a guide plate for the shutter 5. The portion 8 is formed by press working (so-called piercing press).

Incidentally, since the optical disk 2 accommodated in the case 1 is 3.5 inches, the width of the guide plate 8 is 5 inches in accordance with the 3.5-inch optical disk 2. It is narrower than the width. For this reason, it is difficult to press the second recess 26 in which the head of the tapping screw 16 can be housed in the guide plate portion 8.
However, since the substantially mortar-shaped second recess 26 is press-formed in the narrow guide plate portion 8, this press processing can be easily performed. When the first dent 25 and the second dent 26 are fitted, the slider 15 is positioned on the shutter 5. After the positioning, the tapping screw 16 (connecting member) is inserted through the first and second recesses 25 and 26, and the slider 15 is fixed to the cylinder 5 by the tapping screw 16. Since the head of the tapping screw 16 is housed in the second recess 26, the head does not protrude from the surface of the shutter 5. For this reason, tapping screw 16
There is no possibility of catching a finger or the like on the head.

A substantially right half of the slider 15 is provided with a second sliding contact surface portion 15a which is in sliding contact with the second guide surface 12, and both the second sliding contact surface portion 15a and the second guide surface 12 are made of synthetic resin. Therefore, the second sliding contact surface portion 15a
Has lubricity with respect to the second guide surface 12.

Further, a first spring receiving portion 17 is formed at the right end portion of the substantially right half. A storage chamber 19 for storing the torsion coil spring 18 is provided in the case 1, and a second spring receiving portion 20 is formed in the case 1 at the upper right end of the storage chamber 19. The first and second spring receiving portions 17,
One end and the other end of the torsion coil spring 18 are engaged with 20, respectively, and the slider 15 is biased to the left in FIG.

On the other hand, the approximately left half of the slider 15 is formed so as to be thin so that the head (not shown) of the recording / reproducing apparatus can approach the head insertion port 3 from the side as shown in FIG. . A first sliding contact surface portion 15 slidingly contacting the first guide surface 11 is provided on a left end side portion of a substantially left half of the slider 15.
The first sliding contact surface portion 15b has lubricity with respect to the first guide surface 11 for the same reason as described above.

As shown in FIGS. 6 and 7, first and second fitting projections 21 and 22 each having a substantially barbed cross section are integrally formed at both ends of the slider 15 in the sliding direction. When the first and second fitting projections 21 and 22 are pressed into the first and second fitting grooves 23 and 24 formed in the case 1 along the sliding direction, respectively, when the slider 15 slides. The case 1 is easily prevented from coming off. Further, the opening / closing plate portion 6 of the shutter 5 and the auxiliary opening / closing plate portion 7
Is slightly narrowed so as to approach inward as approaching the front end side (lower end side in FIG. 3). The slightly shrinkable opening / closing plate portion 6 and the auxiliary opening / closing plate portion 7 make it easy to remove from the case 1. Prevents coming off.

Here, when the disk cartridge is mounted on the recording / reproducing apparatus, the opening / closing pin P of the apparatus is used to open the rotary hole 4 and the head insertion hole 3 as shown in FIG.
The middle left upper end portion is pressed, and the shutter 5 is slid rightward.
At this time, the shutter 5 is not in direct sliding contact with the case 1 but is in sliding contact with the case 1 via the slider 15. That is, the first and second sliding contact surfaces 15 having lubricity
a and 15b are in sliding contact with the first and second guide surfaces 11 and 12. In order to prevent the slider 15 from easily coming off the case 1, the first and second fitting protrusions 21 and 22 made of synthetic resin are connected to the first and second fitting grooves 2.
The first and second fitting projections 21 and 22 also have lubricity with respect to the first and second fitting grooves 23 and 24. Therefore, if the shutter 5 is pressed by the opening / closing pin P, the shutter 5 can be slid smoothly with respect to the case 1.

Incidentally, in order to attach the shutter 5 to the case 1 when assembling the disk cartridge, the shutter 5
First and second fitting projections 2 of the slider 15 fixed to the
When the shutters 1 and 22 are pressed into the first and second fitting grooves 23 and 24 of the case 1, the shutter 5 can be attached to the case 1 with one touch.

[0023]

As described above, according to the present invention, since the slider which is in sliding contact with the case is attached to the shutter, the shutter can be slid with respect to the case via the slider having lubricity. it can. Therefore,
The shutter can slide smoothly with respect to the case. In addition, when a mortar-shaped recess for accommodating the head of the connecting member in the bent portion of the shutter is pressed,
This pressing can also be performed on the narrow bent portion.

[Brief description of the drawings]

FIG. 1 is a perspective view of a front side of a disk cartridge according to an embodiment of the present invention.

FIG. 2 is a perspective view of the back side of the disc cartridge of FIG. 1;

FIG. 3 is a sectional view of a shutter of the disk cartridge of FIG. 1;

FIG. 4 is a partially enlarged front view of a lower half of the disc cartridge shown in FIG. 1 and is a sectional view taken along line IV-IV of FIG. 5;

FIG. 5 is a plan view of the disc cartridge of FIG. 1;

FIG. 6 is a sectional view taken along line VI-VI in FIG. 4;

FIG. 7 is a sectional view taken along line VII-VII in FIG. 4;

FIG. 8 is a perspective view of the back side of a conventional disk cartridge.

FIG. 9 is a perspective view of a shutter of the disc cartridge of FIG. 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Case 2 ... 3.5 inch disk-shaped recording medium 3 ... Head insertion hole 4 ... Rotation hole 5 ... Shutter 15 ... Slider 26 ... 2nd recess

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G11B 23/03 G11B 23/033

Claims (1)

(57) [Scope of request for utility model registration] 1. A case (1) accommodating a disk-shaped recording medium (2), a head insertion hole (3) formed in the case, and a rotation hole (4) for rotating the disk-shaped recording medium. A shutter (5) attached to the case for opening and closing, and formed by bending a thin sheet into a substantially U-shaped cross section; and a case attached to the shutter and sliding in the opening and closing direction of the shutter. Slider ( 1
The slider ( 15 ) is provided with a portion protruding from the mounting position of the shutter (5) in a closing direction of the shutter, and the tip of the protruding portion is provided with the case (1). protrusion that slides the slider guide surface (11) on which is provided a) (15b) are formed at both ends of the slider (15) is pre-Symbol case (1)
Projections which projections engage in the casing (1) enters the interior of the (21, 22) is provided, the closing direction of the shutter
The protrusion (22) located on the side is closer to the protrusion (15b).
A disk cartridge extending in a closing direction of the shutter .