JPH0740421B2 - Disco Cartridge - Google Patents

Description

The present invention relates to a disk cartridge such as a magnetic disk cartridge, an optical disk cartridge, and an optical-magnetic disk cartridge, and more particularly to opening and closing a head access port. The present invention relates to a disk cartridge having a shutter to perform.

[Conventional technology]

FIG. 8 is an exploded perspective view of a conventional magnetic disc cartridge, and FIG. 9 is a partial sectional view of the magnetic disc cartridge.

The magnetic disk cartridge is composed of a cartridge case 51 formed of a hard synthetic resin, a magnetic disk 52 rotatably housed therein, and a shutter 53 slidably supported by the cartridge case 51. It is mainly composed.

A circular opening 54 is formed substantially in the center of the cartridge case 51, and a head insertion port 55 is provided in the vicinity thereof. Since the shutter 53 slides on the head insertion port 55, the upper surface in the vicinity of the head insertion port 55 is slightly lowered to form a recessed portion 56, and the shutter 53 slides near the front surface of the recessed portion 56. A guide groove 57 extending along the direction is provided.

The shutter 53 is made of, for example, a metal plate such as a stainless steel plate, and has a U-shaped side surface, and has an opening 58 having substantially the same size as the head insertion port 55 and the head insertion port 55 adjacent to the opening 58. A closed portion 61 is formed, and the two protruding pieces 59 are protruded downward by cutting and raising. As shown in FIG. 9, the projecting piece 59 is fitted in the guide groove 57 of the cartridge case 51, and when the head 53 is opened and closed by the shutter 53, the projecting piece 59 is set in the guide groove 57. Slide.

[Problems to be solved by the invention]

This conventional magnetic disk cartridge is based on the
The protruding piece 59 of 53 is provided so as to protrude downward from the face plate portion 60 that forms the opening portion 58 and the closing portion 61. Therefore, when the shutter 53 is incorporated into the cartridge case 51, the shutter insertion position is regulated, and the cartridge 62 is provided with a slit in a portion 62 where the protrusion 59 contacts the cartridge case 51, thereby forming a flexible structure. It was possible to embed. However, if the shutter insertion position shifts, the protrusion 59 bends and deforms due to the contact with the cartridge case 51, so that when sliding in the guide groove 57, the slidability is poor and the abrasion powder of the cartridge case 51 is poor. Is easily generated, and it adheres to the magnetic disk 52 to adversely affect magnetic characteristics and the like.

Further, when the insertion position of the shutter 53 is displaced, a force is easily applied in the direction of increasing the distance between the double-sided plate portions 60, 60 of the shutter 53,
Especially when the metal shutter 53 is deformed, it becomes wide open. Therefore, when the shutter 53 is mounted on the cartridge case 51, the dimension of the projecting piece 59 inserted into the guide groove 57 becomes short, and as a result, the engagement between the guide groove 57 and the projecting piece 59 becomes uncertain, and a slight impact is generated. However, the shutter 53 easily comes off from the cartridge case 51.

Further, since the projecting piece 59 is cut and raised downward from the face plate portion 60, the cartridge 53 is attached to the shutter 53 respectively.
When an external force is applied in a direction away from 51, the projecting piece 59 is likely to return to its original flat state, so that the shutter 53 is easily removed from the cartridge case 51.

The object of the present invention is to eliminate such drawbacks of the prior art,
The purpose of the present invention is to provide a high-quality disc cartridge with a reliable and reliable engagement between the cartridge case and the shutter.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention is provided with a cartridge storage case that rotatably accommodates a disk and a shutter for opening and closing at least a head access opening such as a magnetic head insertion opening of the cartridge storage case. In the cartridge, the shutter opens and closes the head access opening.
Side face shape including a face plate portion, a second face plate portion that faces the first face plate portion and opens and closes the head access port, and a connecting portion that connects the end portions of the first face plate portion and the second face plate portion Is formed of a synthetic resin molded body having a U-shape, an engaging claw is provided on the inner side of the connecting portion facing the cartridge case, and extends in the sliding direction of the shutter at the end of the cartridge case. An engaging portion is provided, and by engaging the engaging claw of the shutter and the engaging portion of the cartridge case,
The shutter is slidably retained in the cartridge case, and a notch is formed in the vicinity of the root of the connecting portion of the first face plate and the second face plate facing the engaging claws of the shutter. It is characterized by that.

〔Example〕

 Next, each embodiment of the present invention will be described with reference to the drawings.

1 to 7 are for explaining a magnetic disk cartridge according to a first embodiment of the present invention. FIG. 1 is a bottom view of the disk cartridge and FIG. 2 is a schematic view of the disk cartridge. A partial plan view of the cartridge case used, FIGS. 3 and 5 are a partial front view and a partial plan view of the disk cartridge, and FIG. 4 is a view of FIG. 3C.
6 is a sectional view taken along line -C, FIG. 6 is a sectional view taken along line AA of FIG. 5 and taken along line BB of FIG. 5, and FIG. 7 is a state before the shutter of the disk cartridge is assembled in the cartridge case. It is a partial cross section figure for demonstrating.

Magnetic Disc Cartridge is a Cartridge Case 1
And a magnetic disk 2 rotatably housed in it,
It is mainly composed of a shutter 3 slidably supported by the cartridge case 1.

The cartridge case 1 is composed of an upper case 1a and a lower case 1b, which are made of a hard synthetic resin such as ABS resin.

A circular opening 4 for inserting the drive shaft is provided at approximately the center of the lower case 1b.
Is formed, and a rectangular head insertion opening 5 is provided near it. In the vicinity of the front surfaces of the upper case 1a and the lower case 1b, trapezoidal recesses 6 having a slightly lower shape are formed in order to restrict the sliding range of the shutter 3. The head insertion port 5 is opened in the recess 6. As shown in FIGS. 2, 5, and 6, near the front surface of the lower case 1b, a guide groove 7 and a ridge 10 extending along the sliding direction of the shutter 3 and opening upward are formed,
The ridge 10 is provided with a perspective surface 11 which is gradually lowered toward the front side.

Further, as shown in FIG. 1, a rib 20 is provided on the inner surface of the cartridge case 1 so as to extend around the entire circumference thereof, and a disk storage chamber 21 is formed inside the rib 20. In this way, by providing the continuous ribs 20 to isolate the disk storage chamber 21 from the outside, even if abrasion powder is generated due to sliding contact between the cartridge storage case 1 and the shutter 3, the disk storage chamber
No wear debris will enter the 21.

As shown in FIG. 1, the magnetic disk 2 is a disk storage chamber.
A hub 8 made of metal, which is rotatably housed in 21 and is connected to the center of the hub 21, is arranged in the opening 4 of the upper case 1a.

The shutter 3 is formed of a synthetic resin, such as polyacetal resin or polyamide resin, which is slightly softer than the cartridge case 1 and elastically deformable. The shutter 3 includes a first face plate portion 3a, a second face plate portion 3b provided so as to face the first face plate portion 3a, and double face plate portions 3a, 3b.
And a connecting portion 3c connecting the front end portions of the
The lateral shape is U-shaped and the planar shape is trapezoidal. First
The face plate portion 3a and the second face plate portion 3b are the head insertion port 5
Has a sufficient area to occlude.

On the side of the connecting portion 3c facing the cartridge case 1 (see FIGS. 5 and 6), two elastically deformable engaging claws are arranged at a predetermined interval along the sliding direction of the shutter 3. 12 are projected. The engaging claw 12 includes a bending part 13 extending substantially vertically from the connecting part 3c and a claw part provided at the tip of the bending part 13.
It is composed of 14 and. The side surface of the claw portion 14 facing the cartridge case 1 is rounded so that it can be easily inserted along the inclined surface 11 of the protrusion 1 of the lower case 1b when the shutter is inserted.

Further, as shown in FIG. 6, notches 23a, 23b are formed in the vicinity of the roots of the first claw 12 and the first surface plate 3a and the second surface plate 3b facing the connecting portion 3c facing each other. This notch 23a, 23b
By forming the above, only the vicinity of the root portion is deformed, and the shutter 3 can be easily inserted into the cartridge case 1.

As shown in FIG. 3, a spring hooking projection 15 is horizontally formed on the inner surface of the connecting portion 3c at a substantially middle position in the height direction thereof. As shown in FIG. 5, a torsion coil spring 17 is interposed between the spring hooking projection 15 and the spring insertion groove 16 formed in the cartridge case 1, and the spring elasticity of the torsion coil spring 17 causes the shutter 3 to move to the head insertion opening. 5 is elastically biased in the direction of closing. The positions of the shutter 3 and the torsion coil spring 17 shown by the one-dot chain line in FIG.
The positional relationship is shown when the head insertion opening 5 is opened by the movement of.

In FIGS. 3 and 4, reference numeral 22 denotes a spring insertion opening, which is used by inserting the shutter 3 into the cartridge case 1 and then inserting the torsion coil spring 17 in a compressed state from the spring insertion opening 22 to release it. One end engages with the spring hooking projection piece 15 of the shutter 3 and the other end engages with the spring insertion groove 16 of the cartridge case 1.

FIG. 6 shows a state before the shutter 3 is assembled in the cartridge case 1. It is not necessary to open the double-sided plate parts 3a, 3b of the shutter 3 as shown in the figure when installing, and the front side of the cartridge case 1 can be directly inserted between the double-sided plate parts 3a, 3b. Good. Then, first, the claw portion 14 of the engaging claw 12 comes into contact with the inclined surface 11 of the protrusion 10 of the cartridge case 1, and further the cartridge case 1
By inserting the claw portion 14, the bending portion 13 of the engaging claw 12 is bent by the elasticity of the engaging claw portion 14 so that the claw portion 14 goes over the projection 10 and finally the claw portion 14 moves into the guide groove as shown in FIG. It is inserted in 7 and engages the side surface of the protrusion 10. In this way, the shutter 3 is slidably supported by the cartridge case 1.

As in the first embodiment, if the inclined surface 11 of the cartridge case 1 is provided over the entire length of the ridge 10,
It is characterized in that the insertion position of the shutter 3 into the cart case 1 is not restricted. However, the present invention is not limited to this, and a plurality of inclined surfaces 11 may be formed at predetermined positions instead of the entire length of the protrusion 10.

In the above-described embodiment, the case where the shutter 3 opens and closes only the head insertion port 5 has been described, but it is also possible to use a shutter that opens and closes both the head insertion port 5 and the opening 4 into which the hub 8 is inserted.

Further, in the above-mentioned embodiment, the case of the magnetic disk cartridge was explained, but the present invention is not limited to this, and can be applied to other disk cartridges such as an optical disk cartridge and an optical-magnetic disk cartridge. Is.

〔effect〕

As described above, the present invention has a structure in which engaging portions are provided on the connecting portion of the shutter and the end surface of the cartridge case, and the shutter is slidably supported on the cartridge case by the engagement of both engaging portions. ing.

Therefore, when installing a shutter in the cartridge case,
Since the notch is formed in the vicinity of the root of the connecting portion of the first surface plate and the second surface plate facing the engaging claw, only the vicinity of the root is deformed and the shutter is inserted into the cartridge case. Is easy.

Further, the engaging portion provided on the shutter extends to the cartridge case side, and this direction coincides with the direction in which the shutter is disengaged from the cartridge case. Therefore, when the shatter is about to be disengaged from the cartridge case by an external force, the engaging part tends to be stretched by the force, but the shatter is highly resistant to this direction. It does not come off from the toritsuji case.

As described above, it is possible to provide a reliable disk cartridge with which the cartridge case and the shutter are securely engaged with each other.

[Brief description of drawings]

1 to 6 are for explaining a magnetic disk cartridge according to a first embodiment of the present invention. FIG. 1 is a plan view of the disk cartridge, and FIG. 2 is a schematic view of the disk cartridge. A partial plan view of the cartridge case used, FIGS. 3 and 5 are a partial front view and a partial plan view of the disk cartridge, and FIG. 4 is a view of FIG. 3C.
6 is a sectional view taken along line -C, FIG. 6 is a sectional view taken along line AA of FIG. 5 and taken along line BB of FIG. 5, and FIG. 7 is a state before the shutter of the disk cartridge is assembled in the cartridge case. FIG. 8 is an exploded perspective view of a conventional magnetic disc cartridge, and FIG. 9 is a partial sectional view of the disc cartridge. 1 ... Cartridge case, 2 ... Magnetic disk, 3 ...
... Shutter, 3a ... First face plate part, 3b ... Second face plate part, 3c
...... Connecting part, 5 ...... Head insertion port, 7 ...... Guide groove, 12
...... Engagement claws, 23a, 23b ...... Notches.

Claims (1)

[Claims] 1. A disk cartridge including a cartridge storage case rotatably storing a disk and a shutter for opening and closing a head access opening of the cartridge storage case, wherein the shutter is the head access opening. First to open and close
Side face shape including a face plate portion, a second face plate portion that faces the first face plate portion and opens and closes the head access port, and a connecting portion that connects the end portions of the first face plate portion and the second face plate portion Is formed of a synthetic resin molded body having a U-shape, an engaging claw is provided on the inner side of the connecting portion facing the cartridge case, and extends in the sliding direction of the shutter at the end of the cartridge case. An engaging portion is provided, and by engaging the engaging claw of the shutter and the engaging portion of the cartridge case,
The shutter is slidably retained in the cartridge case, and a notch is formed in the vicinity of the root of the connecting portion of the first face plate and the second face plate facing the engaging claws of the shutter. Disc Cartridge which features that.