JP2515313Y2 - Disk cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk cartridge containing a disk-shaped recording medium.

[Conventional technology]

The disc-shaped recording medium used in the recording / reproducing apparatus is protected by storing the disc-shaped recording medium in a disc cartridge in order to prevent the disc-shaped recording medium from being damaged or dust being attached when not in use. There is. An example of such a disc cartridge is shown in FIG. 9 and FIG.
There are some as shown in Fig. 10. In FIG. 9, reference numeral 10
1 is a case composed of an upper half piece 101a and a lower half piece 101b,
A disc-shaped recording medium (not shown) is housed in the case 101. The case 101 has a rotation hole (not shown) for rotating the disk-shaped recording medium and a head insertion hole for approaching the head for reading / writing information when the disk cartridge is mounted in the recording / reproducing apparatus. (Not shown) is formed.

Here, in order to prevent dust from entering the inside of the case 101 through the rotation hole or the head insertion hole, the case 10
A shutter 102 is attached to 1 as shown in FIG. The shutter 102 is constantly urged by a torsion coil spring 103 housed in the case 101 to close the rotation hole and the head insertion hole. When the shutter 102 is slid against the biasing force of the torsion coil spring 103, the rotation hole and the head insertion hole are opened.

By the way, if the front and back of the disk cartridge are mistakenly mounted on the recording / reproducing apparatus in reverse, the opening / closing pin P of the recording / reproducing apparatus faces the opposite side of the case 101. When the opening / closing pin P is located on the opposite side of the case 101 as shown in FIG. 9, the opening / closing pin P tends to move the shutter 102 in the closed state in the closing direction.
Then, the shutter 102 and the case 1 are opened by the opening / closing pin P.
01 may be damaged. Therefore, in such a case, in order to prevent the operation of the opening / closing pin P, a blocking wall 104 is formed on the case 101 so as to project upward.

[Problems to be solved by the device]

However, in such a conventional disc cartridge, since the metal shutter 102 is in direct sliding contact with the case 101, there is a problem that it is difficult to smoothly slide the shutter 102 with respect to the case 101. .

Therefore, for example, as shown in FIG. 10, it is conceivable to attach a slider 105 to the shutter 102, which slides against the case 101. In order to open the shutter 102 with the slider 105 attached in this way, the slider 1
When 05 is slid to the lower right against the urging force of the torsion coil spring 103, a blocking wall 104 is formed at the upper end of the case 101, so that the slider 105 contacts the blocking wall 104 and This causes a new problem that the sliding is blocked and the shutter 102 cannot be completely opened.

[Means for solving the problem]

In order to solve such a problem, according to the present invention, a case 1 accommodating a disk-shaped recording medium 2 and a biasing member attached to the case 1 are biased in the closing direction to A shutter 5 that is pushed in the opening direction by a separate opening and closing pin P and that can be opened and closed on the case 1, a slider 15 that is attached to the shutter 5 and is in sliding contact with the case 1, and the slider 15 in the case 1. And a blocking wall 25 for blocking the movement of the opening / closing pin P in the closing direction with respect to the shutter in the closed state, which is formed at the sliding contact portion of the slider 15
In addition, the disk cartridge is formed with the escape portion 27 that does not come into contact with the blocking wall 25 in the opening direction of the shutter.

[Action]

When the disk cartridge is installed in the recording / playback device,
The opening / closing pin of this device pushes and slides the 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,
It is in sliding contact with the slider. Therefore, the shutter can be slid smoothly on the case.

Also, if the slider is slid to open the shutter, the blocking wall will enter the clearance formed in the slider. Therefore, the slider does not come into contact with the blocking wall and its sliding is not blocked.

〔Example〕

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

1 to 8 are views showing one embodiment of a 3.5-inch disk cartridge according to the present invention.

In FIGS. 1 and 2, reference numeral 1 is a case of a disk cartridge, and the case 1 is made of synthetic resin and is composed of an upper half piece 1a and a lower half piece 1b of a rectangular flat plate-like casing. Optical information was recorded in Case 1.
A 5-inch optical disc 2 (disc-shaped recording medium) is stored. A rotation hole 4 for rotating the optical disc 2 in the case 1 by a spindle motor (not shown) when the optical disc 2 is mounted on the recording / reproducing apparatus is formed in the center of the lower half piece 1b of the case 1. The hub 2a provided at the center of the optical disc 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 disc 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 such as stainless steel into a U-shaped cross section, and an opening / closing plate portion 6 for opening and closing the rotation hole 4 and the head insertion hole 3. It has an auxiliary opening / closing plate portion 7 having a bending length shorter than that of the opening / closing plate portion 6. Further, a guide plate portion 8 located at the tip of the recording / reproducing device insertion side of the case 1 is formed in the bent portion (the upper portion in the figure) of the shutter 5.

Here, as shown in FIG. 4, the guide portion G formed at the tip of the recording / reproducing apparatus of the case 1 is formed on the left side of the drawing and extends horizontally at a position dropped from the upper end surface of the case 1. The first guide surface 11 and the second guide surface 11 are formed on the opposite side to the head insertion hole 3.
And a guide surface 12. A connecting portion 13 is formed between the guide surfaces 11 and 12.

On the head insertion hole 3 side of the first guide surface 11,
An opening recess 14 is formed so that the opening / closing pin P for opening / closing the shutter 5 can be dropped when the shutter 5 is opened. The opening / closing pin P moves the shutter 5 to the right above the head, and opens the head insertion hole 3. In this way, 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 is in sliding contact with the guide portion G is attached to the inner surface side of the guide plate portion 8 having a substantially U-shaped cross section.
The right half of the figure is the tapping screw on the inner surface of the guide plate 8.
It is fixed by 16. A second sliding contact surface portion that is in sliding contact with the second guide surface 12 is provided on the substantially right half of the slider 15.
Since the second sliding contact surface portion 15a and the second guide surface 12 are both made of synthetic resin, the second sliding contact surface portion 15a is provided.
Are lubricious with respect to the second guide surface 12.

Further, the first spring receiving portion is provided on the right end portion of the substantially right half.
17 are formed. Torsion coil spring in case 1
A storage room 19 for storing 18 is provided.
A second spring receiving portion 20 is formed on the case 1 at the upper right end of the. A torsion coil spring 18 is provided in the first and second spring receiving portions 17 and 20.
The one end and the other end of the
The slider 15 is biased to the left in FIG. 4 by 18.

On the other hand, the approximately left half of the slider 15 is formed thin so that a head (not shown) of the recording / reproducing apparatus can approach the head insertion opening 3 from the side as shown in FIG. In addition, a first sliding contact surface portion 15b which is in sliding contact with the first guide surface 11 is formed on the left end side portion of the substantially left half of the slider 15, and the first sliding contact surface portion 15b is the first sliding contact surface portion 15b for the same reason as described above. 1 It has a slipperiness with respect to the guide surface 11.

Further, as shown in FIGS. 6 and 7, first and second fitting projections 21 and 22 each having a substantially arrowhead-shaped cross section are integrally formed on both ends in the sliding direction of the slider 15 downward in FIG. Has been done. A split groove 21b is formed in the center line portion of the first fitting protrusion 21 downward in FIG. 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, and the slider 15 is slid. Sometimes, it is prevented from coming off from the case 1 easily.

The above-mentioned first spring receiving portion 17 is connected to the first fitting projection 21 at the upper portion of the slider 15 in FIG. 4, and the first spring receiving portion 17 is bent at a right angle to the torsion coil spring 18. The formed tip 18a is formed so as to be housed. Further, as shown in FIG. 6, the first spring receiving portion 17 has a pulling protrusion for preventing the torsion coil spring 18 from easily coming off.
17a is formed, and the first spring receiving portion 17 is
It communicates with the split groove 21b. When the slider 15 is slid to the right in FIG. 4, the torsion coil spring 18 is pressed to the same right, but one end arm portion 18b of this torsion coil spring 18 is pressed.
Rotates around the tip 18a that engages with the first spring receiving portion 17 toward the first fitting protrusion 21 and enters into the first split groove 21b.

By the way, if the front and back of the disk cartridge are mistakenly mounted in the recording / reproducing apparatus in the reverse direction, the opening / closing pin P is inserted as described above.
Causes the shutter in the closed state to be pushed further in the closing direction. In order to prevent the operation of the opening / closing pin P, as shown in FIGS. 4 and 8, the insertion end portion of the upper half piece 1a is blocked on the opposite side to the guide surface 11 and the head insertion hole 3. The wall 25 is formed so as to partially project upward in FIG. Further, a notch 26 into which the opening / closing pin P is inserted is formed adjacent to the blocking wall 25 (on the right side in the figure). Therefore, when the slider 15 is slid to the right in FIG. 5 to open the shutter 5, the slider 15 comes into contact with the blocking wall 25 and the sliding is blocked, so that the shutter 5 is completely removed. You will not be able to open it.

Therefore, on the right end side in FIG. 5 of the slider 15 and on the upper end side thereof, the length l ₁ of the notch portion 26 of the upper half piece 1a and the blocking wall are shown.
The relief portion 27 is formed by cutting out a length (l ₁ + l ₂ ) that is substantially the same as the length obtained by adding the length l _{2 of} 25. Also, the escape section 27
As shown in FIG. 6, the slider 15 is formed on the right end side of the slider 15 in the same figure by being cut out by substantially the same amount as the blocking wall 25 having a substantially flat cross section. Therefore, even if the slider 15 is slid to the lower right in order to open the shutter 5 as shown in FIG. 8, the blocking wall 25 enters the escape portion 27. Therefore, the slider 15 can be slid to the end without contacting the blocking wall 25 and being prevented from sliding, and the shutter 5 can be completely opened.

[Effect of device]

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 on the case via the slider having the sliding property. Therefore, the shutter can be slid smoothly on the case.

Further, since the sliding wall of the slider is provided with a blocking wall for blocking the operation of the opening / closing pin in the closing direction with respect to the shutter in the closed state, even if this disk cartridge is loaded into the recording / reproducing device in the reverse direction. It is possible to prevent the shutter, the case and the like from being damaged by the opening and closing pin.

Further, since the escape portion is formed in the slider so as not to come into contact with the blocking wall, even if the slider is slid to open the shutter, the blocking wall will enter the escape portion. Therefore, the slider can be slid to the end without coming into contact with the blocking wall and being prevented from sliding, and the shutter can be completely opened.

[Brief description of drawings]

1 to 8 are views showing an embodiment of a disc cartridge according to the present invention. FIG. 1 is a front perspective view of the disc cartridge, and FIG. 2 is a rear perspective view thereof.
FIG. 3 is a sectional view of the shutter, FIGS. 4 and 5 are a partially enlarged front view of the lower half piece of the disk cartridge and a plan view of the disk cartridge, respectively.
6 and 7 are sectional views taken along line VI-VI and VII-VII in FIG. 4, respectively, and FIG. 8 is a partial perspective view of this case. 9 and 10 are views showing a conventional disc cartridge, FIG. 9 is a perspective view of the back side of this disc cartridge, and FIG. 10 is a partial perspective view of this case. 1 ... Case, 2 ... 3.5-inch disk-shaped recording medium, 3 ... Head insertion hole, 4 ... Rotation hole, 5 ... Shutter, 15 ... Slider, 17 ... First spring receiver, 21 ,twenty two
...... Mating protrusion, 25 …… Blocking wall, 27 …… Escape part.

Claims (1)

(57) [Scope of utility model registration request] 1. A case in which a disk-shaped recording medium is housed, and a biasing member attached to the case biases the disk in the closing direction and pushes it in the opening direction by an opening / closing pin which is separate from the case. A shutter that can be opened and closed by means of a shutter, a slider that is attached to this shutter and that slides in contact with the case, and the opening and closing pin formed in the portion of the case that slides in contact with the slider in the closing direction with respect to the shutter in the closed state And a blocking wall for blocking the operation of the disk cartridge, wherein the slider is formed with an escape portion that does not come into contact with the blocking wall in the opening direction of the shutter.