JP2945309B2 - 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 3.5-inch disk cartridge.

[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 composed of an upper half piece 101a and a lower half piece 101b. The case 101 stores a disk-shaped recording medium (not shown). 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 is 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.

Therefore, it is conceivable to attach a slider that slides on the case 101 to the shutter 102. In order to prevent the slider from coming off the case 101, it is necessary to slidably attach the slider to the case 101. . To this end, a method is conceivable in which an engagement projection is formed on the slider, and the engagement projection is sandwiched between a pair of upper half pieces 101a and lower half pieces 101b, and the slider is attached to the case 101. However, when the slider is attached to the case 101 in this manner, the engagement projections of the slider are
a and 101b must be inserted one by one, which causes a new problem that it is complicated and takes time for assembly.

[0007]

In order to solve such problems, the present invention provides a case in which a 3.5-inch disk-shaped recording medium is stored, and a head formed in the case. In a 3.5-inch disk cartridge provided with an insertion hole and a shutter for opening and closing a rotation hole for rotating a disk-shaped recording medium, a slider that is in sliding contact with the case is attached to the shutter, and the slider is divided. A fitting protrusion having a groove is formed, and a fitting groove in which the fitting protrusion can be fitted is formed in the case.

When a disk cartridge 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 contact with the case but in contact with the case via the slider. Therefore, the shutter can be slid smoothly with respect to the case.

Further, since a split groove is formed in the fitting protrusion of the slider, the fitting protrusion is easily elastically deformed when the fitting protrusion is pressed into the fitting groove of the case. And press fit into the fitting groove.

[0010]

DETAILED 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 3.5-inch disk cartridge according to the present invention.

In FIGS. 1 and 2, reference numeral 1 denotes a disk cartridge case. The case 1 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, 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-shaped cross section from substantially the center, and 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 the bent portion (upper portion in the figure) of the shutter 5 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. The opening / closing pin P moves the shutter 5 rightward above the head, and opens the head insertion hole 3. 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 polyacetal, which slides on the guide portion G, is attached to the inner surface side of the guide plate portion 8 having a substantially U-shaped cross section. It is fixed to the inner surface side of the guide plate 8 by a tapping screw 16. A substantially right half of the slider 15 is provided with a second sliding contact surface portion 15a that comes into sliding contact with the second guide surface 12, and the second sliding contact surface portion 15a is provided.
Since both a and the second guide surface 12 are made of synthetic resin, the second sliding contact surface portion 15 a has lubricity with respect to the second guide surface 12.

Further, a first spring receiving portion (first receiving portion) 17 is formed in the right end portion of the substantially right half. A storage chamber 19 for storing a torsion coil spring (biasing member) 18 is provided in the case 1, and the case 1 at the upper right end of the storage chamber 19 has a second spring receiving portion (second receiving portion). 20 are formed. 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 moved by the torsion coil spring 18 in FIG.
It is biased to the middle left.

On the other hand, the approximately left half of the slider 15 is formed 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 in the sliding direction of the slider 15 downward in the figure. Is formed. That is, raised gill portions 21a and 22a are formed on the tip side (the lower side in FIGS. 6 and 7) of the first and second fitting projections 21 and 22, respectively, from the gill portions 21a and 22a to the tip. Is gradually purging.

When the slider 15 is slid left and right in FIG. 4, the first and second fitting projections 21 and 22 are also slid at the same time, but the first and second fitting projections 21 and 22 are slid. The first and second fitting grooves 2
3, 24 are provided. First and second fitting grooves 23, 2
The edge of 4 is defined by protrusions 1c, 1d formed on the inner walls of the upper and lower halves 1a, 1b. The interval between the projections 1c, 1d is smaller than the width of the gills 21a, 22a. Therefore, it is difficult to press the gills 21a and 22a between the protrusions 1c and 1d.

Therefore, the first and second fitting projections 21, 22 are provided.
The first and second split grooves 21b and 22b are formed in the center line portions of FIGS. 6 and 7 downward in FIGS.
When the first and second split grooves 21b and 22b are formed as described above, when the gill parts 21a and 22a are pressed against the protruding parts 1c and 1d, the gill parts 21a and 22a are first and second. The fitting protrusions 21 and 22 can be elastically deformed toward the center line, and can easily pass through between the protrusions 1c and 1d. Therefore, the first and second fitting protrusions 21 and 22 can be pressed into the first and second fitting grooves 23 and 24 formed in the case 1 along the sliding direction, respectively. This prevents the slider 15 from easily coming off the case 1 when sliding.

The above-mentioned first spring receiving portion 17 is connected to the first fitting projection portion 21 at the upper portion of the slider 15 in FIG. 4, and the first spring receiving portion 17 is at right angles to the torsion coil spring 18. It is formed so that the front end 18a bent into a shape is housed. A hooking projection 17a is formed on the right side of the first spring receiving portion 17 in FIG. 4 to prevent the torsion coil spring 18 from easily coming off. 17 is a first split groove 21 as shown in FIG.
b. When the slider 15 is slid rightward in FIG. 4, the torsion coil spring 18 is pressed to the same right, but one end arm portion 18 b of the torsion coil spring 18
It rotates toward the first fitting protrusion 21 around the tip 18 a engaging with the first spring receiving portion 17. Since the first split groove 21b is formed in the first fitting protrusion 21, the one end arm 1
8b can enter the first split groove 21b even if it rotates as it is. Therefore, when the torsion coil spring 18 is pressed, the one-end arm portion 18b is connected to the first split groove 21b.
By entering the inside, it becomes more difficult to remove from the first spring receiving portion 17.

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
b and 15a 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 protrusions 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.

To attach the slider 15 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 connected to the case 1 as described above. 1st, 2nd
It can be pressed into the fitting grooves 23 and 24. For this reason,
In order to attach the slider 15 to the case 1, it is not necessary to sandwich the first and second fitting projections 21 and 22 of the slider 15 between the upper and lower halves 1 a and 1 b of the case 1. Therefore, the slider 15 can be attached to the case 1 with one touch only by press-fitting the first and second fitting protrusions 21a and 21b into the first and second fitting grooves 21 and 22 of the case 1 assembled in advance. it can.

[0024]

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. Therefore, the shutter can be slid smoothly with respect to the case.

Further, since a fitting projection having a split groove is formed on the slider, and a fitting groove in which the fitting projection can be fitted is formed in the case, the fitting projection of the slider is formed in the fitting groove of the case. Can be press-fit. Therefore, it is not necessary to sandwich the fitting projection of the slider between the upper and lower halves of the case when assembling the disk cartridge. Therefore, the slider can be attached to the case with one touch only by press-fitting the fitting protrusion of the slider into the fitting groove of the case assembled in advance.

In addition, the receiving portion of the biasing member is coupled to the slider together with the fitting projection, and the end of the biasing member can be accommodated in the split groove. It becomes more difficult to remove.

[Brief description of the drawings]

FIG. 1 is a perspective view of the front side of a disk cartridge.

FIG. 2 is a perspective view of the back side of the disk cartridge.

FIG. 3 is a sectional view of a shutter.

FIG. 4 is a partially enlarged front view of a lower half of the disk cartridge.

FIG. 5 is a plan view of the disk cartridge.

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

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

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

FIG. 9 is a perspective view of the back side of a conventional disk cartridge.

[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 17 ... 1st spring receiving part 21, 22 ... Fitting protrusion part 21b, 22b ... Split groove 23, 24 ... fitting groove

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

Claims (10)

(57) [Claims] 1. 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 disc cartridge comprising: a shutter (5) attached to the case for opening and closing; and a slider (15) attached to the shutter and contacting the case so as to slide in the opening and closing direction of the shutter. An urging member (18) for urging the shutter in the closing direction includes:
One arm is associated with a first receiving portion (17) provided at an end of the slider in the shutter opening direction, and the other arm is associated with a second receiving portion (20) provided on the case. The slider and the slider
The shutter closing direction is from the shutter to the shutter closing direction.
A disk cartridge characterized by being protruded from the disk cartridge. 2. The disk cartridge according to claim 1, wherein the second receiving portion (20) is formed in a groove shape that opens in a shutter closing direction and extends in the shutter closing direction. . 3. The arm of the urging member (18) engaging with the second receiving portion (20) has a tip bent at a right angle, and the tip bent at a right angle is: 3. The disc cartridge according to claim 2, wherein the disc cartridge is housed in the groove-shaped second receiving portion. 4. The first receiving portion and the second receiving portion,
At a position closer to the opening direction of the shutter (5), the shutter (5) is disposed closer to the recording / reproducing device insertion tip of the case than the second guide surface (12) of the case that slides on the slider (15). The disk cartridge according to claim 1, wherein 5. The device according to claim 1, wherein the first receiving portion is formed in a groove shape that opens in an opening direction of the shutter and extends in a closing direction of the shutter. Disk cartridge. 6. The arm of the urging member (18) engaging with the first receiving portion (17) has a tip bent at a right angle, and the tip bent at a right angle is: 6. The disk cartridge according to claim 5, wherein the disk cartridge is accommodated in the groove-shaped first receiving portion. 7. A guide groove (23, 24) extending in the opening and closing direction of the shutter is formed on a guide surface (11, 12) of the case which is in sliding contact with the slider, and the slider (15) is formed on the guide surface. , Split grooves (21b, 22
b) and formed with fitting protrusions (21, 22) to be fitted into the fitting grooves (23, 24), and connecting the second receiving portion (20) with the fitting protrusions. And the arm of the biasing member (18) is
2. The disc cartridge according to claim 1, wherein the disc cartridge can be accommodated in any one of b and 22b). 8. 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 disc cartridge comprising: a shutter (5) attached to the case for opening and closing; and a slider (15) attached to the shutter and contacting the case so as to slide in the opening and closing direction of the shutter. Fitting grooves (23, 24) extending in the opening and closing direction of the shutter are formed at the end of the case in the recording / reproducing device insertion direction , and the fitting grooves (2) are provided at both ends of the slider (15).
3. A disc cartridge characterized in that fitting projections (21, 22) to be fitted into the cartridge cartridges (3, 24) are formed. 9. A tip of the fitting projection (21, 22) is formed substantially in the shape of an arrow, and a protrusion (1) in the fitting groove is provided.
9. The disk cartridge according to claim 8, wherein said disk cartridge is engaged with said disk cartridge. 10. The fitting projection (21, substantially bar-shaped).
The disc cartridge according to claim 9, wherein a split groove (21b, 22b) is further formed on the fitting projection to elastically deform the fitting projection toward its center line.