JPH10200U - Disk cartridge - Google Patents

Abstract

(57) [Problem] To smoothly open and close a shutter of a disk cartridge. SOLUTION: A slider 6 of a disk cartridge has
A portion is provided that protrudes from the mounting position of the shutter 5 in the closing direction of the shutter. At the end of the protruding part, a case 1
A protrusion 15b that slides on the guide surface 11 of the slider provided in the case 1 is formed. And a connecting portion 13 extending to connect these guide surfaces. At both ends of the slider 6, projections 21, 2 which penetrate inside the case 1 from the surface of the connecting portion 13 and engage with the ridges in the case 1 are provided.
2 is provided.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a disk cartridge containing a disk-shaped recording medium, and more particularly to a 3.5-inch disk cartridge.

[0002]

[Prior art]

 The disk-shaped recording medium used in the recording / reproducing device is protected by storing this disk-shaped recording medium in a disk cartridge to prevent it from being damaged when not in use and from adhering dust. doing. Such disc cartridges include, for example, those shown in FIGS. In FIG. 8, reference numeral 101 denotes a case, in which a disk-shaped recording medium (not shown) is stored. The case 101 has a rotary hole (not shown) for rotating the disk-shaped recording medium when the disk cartridge is mounted on the recording / reproducing apparatus, and a head insertion hole for accessing the head for reading and writing information. (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, a shutter 102 is attached to the case 101 as shown in FIG. The shutter 102 is formed with a pair of open / close plate portions 103 and 104 bent from a substantially center, and a guide plate portion 105 for guiding the shutter 102 so as to be slidable is formed at the substantially center. Further, 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. When the shutter 102 is opened and closed, as shown in FIG. 9, guide projections 105a and 105a are provided on one side of the guide plate 105 to prevent the shutter 102 from coming off the case 101 and guide the shutter 102 in the opening and closing directions. 105b is formed. The guide protrusions 105a and 105b are fitted into guide grooves 106a and 106b formed on one side of the case 101 in the sliding direction.

[0005]

[Problems to be solved by the invention]

 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 105a and 105b are fitted into the guide grooves 106a and 106b. There was a problem that it was difficult to slide the shutter 102 smoothly with respect to the case 101.

[0006]

[Means for Solving the Problems]

 The 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-shaped recording medium. A shutter (5) attached to the case to open and close the rotary hole (4), and formed by bending a thin sheet into a substantially U-shaped cross section; A slider (6) that comes into contact with the case so as to slide in the opening and closing direction. The slider (6) is provided with a portion protruding from the mounting position of the shutter (5) in the closing direction of the shutter, and the tip of the protruding portion is provided on the case (1). A protrusion (15b) that slides on the guide surface (11) of the slider is formed, and two ends of the slider in the opening and closing direction are provided at portions of the case (1) that contact the slider (6). A pair of guide surfaces (11, 12) for guiding the sliders, respectively, and a connecting portion (13) extending so as to connect the guide surfaces are provided. The connecting portions are provided at both ends of the slider (6). Protrusions (21, 22) are provided which enter the case (1) from the surface of (13) and engage with the ridges in the case (1).

The disk cartridge according to the second aspect of the present invention rotates a case (1) containing a disk-shaped recording medium (2), a head insertion hole (3) formed in the case, and a disk-shaped recording medium. A shutter (5) bent and attached to the case to open and close a rotation hole (4) for opening and closing; a slider (6) slidingly contacting the case; and a slider (6) for fixing the slider to the shutter. A connection member (16), and a substantially mortar-shaped recess (26) formed in a bent portion of the shutter for accommodating the head of the connection member.

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 smoothly slid with respect to the case.

[0009]

[Embodiment of the invention]

 Hereinafter, the present invention will be described with reference to the drawings.

FIGS. 1 to 7 are views showing an embodiment of a 3.5-inch disk cartridge according to the present invention.

In FIG. 1 and FIG. 2, reference numeral 1 denotes a case of a disk cartridge. The case 1 is made of a synthetic resin and is composed of an upper half 1a and a lower half 1b which are entirely rectangular and have a flat plate shape. I have. 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, there is formed a rotary hole 4 for rotating the optical disk 2 in the case 1 by a spindle motor (not shown) when the optical disk is mounted on the recording / reproducing apparatus. The hub 2a provided at the center of the optical disk 2 is exposed from the rotation hole 4. A head insertion hole 3 is formed in the upper and lower halves 1a and 1b of the case 1 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 attached to the case 1 in order to prevent dust from entering the case 1 through the rotation hole 4 and the head insertion hole 3. . As shown in FIG. 3, the shutter 5 is formed by bending a thin metal plate made of stainless steel or the like into a substantially U-shape from substantially the center, and includes 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. A guide plate portion 8 is formed at a bent portion (upper portion in the figure) of the shutter 5 at a leading end of the case 1 on the recording / reproducing device insertion side.

Here, the guide portion G formed at the distal end portion of the recording / reproducing device of the case 1 is formed on the left side in the figure and is positioned at a position which is lowered from the upper end surface of the case 1 in the horizontal direction as shown in FIG. The first guide surface 11 has a second guide surface 12 formed on the opposite side to the head insertion hole 3. A connecting portion 13 is formed between the guide surfaces 11 and 12.

An escape recess 14 is formed in the first guide surface 11 on the side of the head insertion hole 3 so that an opening / closing pin P for opening and closing the shutter 5 drops when the shutter 5 is opened. . When the head insertion hole 3 is opened in this way, the opening / closing pin P falls into the escape recess 14.

A slider 15 made of 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 (the upper surface side in FIG. 4) of the slider 15, and the substantially mortar-shaped second dent 26 that can be fitted into the first dent 25 is provided with the shutter 5. Are 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 according to the 3.5-inch optical disk 2. It is smaller than the width of the part. For this reason, it becomes 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-work 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 this 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. Therefore, a finger or the like is not hooked on the head of the tapping screw 16.

A substantially right half of the slider 15 is provided with a second sliding contact surface portion 15a that 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 15 a has lubricity with respect to the second guide surface 12.

Further, a first spring receiving portion 17 is formed at a 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. One end and the other end of the torsion coil spring 18 are engaged with the first and second spring receiving portions 17 and 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. . Further, a first sliding contact surface portion 15b, which is in sliding contact with the first guide surface 11, is formed on a left end side portion of a substantially left half of the slider 15, and the first sliding contact surface portion 15b is formed by the first sliding contact surface portion 15b for the same reason as described above. It has lubricity with respect to one guide surface 11.

Further, as shown in FIGS. 6 and 7, first and second fitting protrusions 21 and 22 each having a substantially arrow-shaped cross section are integrally formed at both ends of the slider 15 in the sliding direction. When the slider 15 is slid, the first and second fitting protrusions 21 and 22 are press-fitted into the first and second fitting grooves 23 and 24 formed in the case 1 along the sliding direction. Moreover, the case 1 is prevented from coming off easily. Further, the opening / closing plate portion 6 and the auxiliary opening / closing plate portion 7 of the shutter 5 are slightly narrowed toward the inner side as they approach the tip side (lower end side in FIG. 3). The case 6 and the auxiliary opening / closing plate 7 also prevent the case 1 from being easily detached.

When the disk cartridge is mounted on the recording / reproducing apparatus, the opening / closing pin P of the apparatus pushes the upper left end of the slider 15 in FIG. Slide 5 to the right. 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 15a and 15b having sliding properties 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 projections 21 and 22 made of synthetic resin are pressed into the first and second fitting grooves 23 and 24. However, 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, when the shutter 5 is pushed by the open / close pin P, the shutter 5 can be smoothly slid with respect to the case 1.

By the way, in order to attach the shutter 5 to the case 1 when assembling the disk cartridge, the first and second fitting projections 21 and 22 of the slider 15 fixed to the shutter 5 are attached to the first and second The shutter 5 can be attached to the case 1 with one touch by press-fitting into the two fitting grooves 23 and 24.

[0023]

[Effect of the invention]

 As described above, according to the present invention, since the slider that 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. Therefore, the shutter can be slid smoothly with respect to the case. In addition, if a mortar-shaped recess for accommodating the head of the connecting member is pressed in the bent portion of the shutter, this pressing can be applied to 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 ... Second dent

Claims (2)

[Utility model registration claims] 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 shutter attached to the shutter and sliding in the opening and closing direction of the shutter. Slider (6) in contact with
The slider (6) is provided with a portion that protrudes from the mounting position of the shutter (5) in the closing direction of the shutter, and a tip of the protruding portion is attached to the case (1). A protrusion (15b) that slides on the guide surface (11) of the slider provided is formed. A portion of the case (1) that contacts the slider (6) is provided in the opening and closing direction of the slider. A pair of guide surfaces (11, 12) for guiding both end portions, respectively, and a connecting portion (13) extending so as to connect the guide surfaces are provided. The connecting portions are provided at the both end portions of the slider (6). (1
Projections (21, 22) that enter the case (1) from the surface of 3) and engage with the ridges in the case (1).
A disk cartridge, characterized by having: 2. A case (1) containing 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) bent and attached to the case for opening and closing; a slider (6) slidingly contacting the case; a connecting member (16) for fixing the slider to the shutter; A disc cartridge comprising a substantially mortar-shaped recess (26) formed in a bent portion of the shutter for accommodating a head of a member.