JPH0636292B2 - Disco Cartridge - Google Patents

Description

Description: TECHNICAL FIELD 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 insertion opening. The present invention relates to a disk cartridge having a shutter to perform.

[Conventional technology]

FIG. 16 is an exploded perspective view of a conventional magnetic disc cartridge, FIG. 17 is a partial plan view showing a state when the magnetic disc cartridge is not used, and FIG. 18 is a relation between a spring member and a cartridge case. No. 19 which is a partial plan view showing a combined state
The figure is a partial front sectional view of the same portion.

The magnetic disk cartridge is composed of a cartridge case 101 formed of a hard synthetic resin, a magnetic disk 102 rotatably housed therein, and a shutter 103 slidably supported by the cartridge case 101. It is mainly composed.

A circular opening 1 is formed in the center of the cartridge case 101.
04 is formed, and the head insertion port 105 is provided near it. Since the shutter 103 slides on the head insertion opening 105, the upper surface in the vicinity of the head insertion opening 105 is slightly lowered to form a concave portion 106, and the shutter 103 slides near the front surface of the concave portion 106. A guide groove 107 extending along the direction is provided.

The shutter 103 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 108 having substantially the same size as the head insertion opening 105 and the head insertion opening 105 adjacent to the opening 108. The closing portion 109 is formed, and the two protruding pieces 110 are protruded downward by cutting and raising. The protrusion 110 is fitted in the guide groove 107 of the cartridge case 101, and when the head 103 is opened and closed by the shutter 103, the protrusion 110 slides in the guide groove 107 and the shutter 103 Does not come off from the cartridge strip case 101.

When not using the magnetic disk cartridge, the shutter 1
Since the head insertion opening 105 must be closed by the closing portion 109 of No. 03, a torsion coil spring 111 is provided in the cartridge case 101 as shown in FIG.
And the shutter 103 is biased in the closing direction by a spring 111.

18 and 19 show the engagement relationship between the spring 111 and the cartridge case 101. The spring 111 is a space 1 provided between both side walls of the cartridge case 101.
01a, one arm 111a (not shown) abuts and fixes the cartridge case 101, and the other arm 111b is bent at a right angle in the horizontal direction, and this bent portion 111c is located above the gap 101a. Is located on a rib 101b that protrudes so as to partially close the opening of the shutter 103, engages with a portion of the shutter 103 at this position, and constantly biases the shutter 103 in the closing direction.

[Problems to be solved by the invention]

In this conventional magnetic disk cartridge, one arm 111 of a spring 111 that moves together with the shutter 103 is used.
The position b is restricted, that is, the deflection of the arm 111b in the thickness direction of the cartridge case is prevented by the rib 101b. Therefore, the spring 111 is attached to the cartridge case 1.
When inserting into the void 101a of No. 01, especially rib 101b
Has a drawback in that the coil portion of the spring 111 is inserted, and the insertion work efficiency is not improved.

The object of the present invention is to eliminate such drawbacks of the prior art,
It is an object to provide a high-quality disk cartridge which can easily attach a spring for urging a shutter and can secure the position of the device and improve the efficiency of assembling work.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention has a cartridge case consisting of an upper case and a lower case in which a disk is rotatably accommodated, and a head insertion opening of the cartridge case slidably attached to the side surface of the cartridge case. A spring for energizing the shutter in one direction at all times by enclosing it in a space provided between the upper case and the lower case, and holding one arm in the cartridge case and the other arm in the shutter. A disk cartridge including a member,
A torsion coil spring is used for the spring member, and one arm that engages with the shutter is integrally formed with a bent portion that abuts both inner wall surfaces of the gap and restricts a shake in a direction orthogonal to the moving direction of the arm. It has a feature.

〔Example〕

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

FIG. 1 is a plan view of a magnetic disk cartridge according to an embodiment of the present invention when not in use, FIG. 2 is a plan view of the magnetic disk cartridge in use, and FIG. 3 is a plan view of an upper case. FIG. 4 is a bottom view of the upper case, FIG. 5 is a bottom view of the upper case with a cleaning sheet attached, FIG. 6 is a plan view of the lower case, and FIG. 7 is a state with the cleaning sheet attached. Fig. 8 is a plan view of the lower case, Fig. 8 is a bottom view of the lower case, Fig. 9 is an enlarged plan view of the shatter, Fig. 10 is an enlarged front view of the shatter, and Fig. 11 is an enlarged right side view of the shatter. Is an enlarged perspective view of the light protector, first
FIG. 3 is a partial cross-sectional view of the portion where the spring member is arranged.

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 molded of a hard synthetic resin such as ABS resin.

A rectangular head insertion opening 5 is provided near one side of the cart case 1, and a circular opening 4 is formed substantially in the center of the lower case 1b as shown in FIGS. 6 to 8. ing. In the vicinity of the front surfaces of the upper case 1a and the lower case 1b, trapezoidal recesses 6 which are slightly lowered are formed in order to regulate the sliding range of the shutter 3. The head insertion port 5 is opened in the recess 6.

As shown in FIG. 3, a plate pressing port 7 having a substantially rectangular shape is formed on the upstream side of the head insertion port 5 in the upper case 1a in the disk rotation direction, and a label attaching portion which is further lowered is formed behind the plate pressing port 7. 8 is provided, and a label 9 is attached to that portion as shown in FIG. As shown in FIG. 4, the disc housing portion 12 is formed inside the regular ribs 11 provided at the four corners of the inner surface of the upper case 1a. At a location inside the disk storage portion 12 and excluding the head insertion opening 5 and the plate pressing opening 7, one or more arcuate ribs 10 are formed substantially concentrically with the rotation center of the magnetic disk 2 stored in the disk storage portion 12. , Preferably a plurality of them are formed.

After the pressing plate 13 is inserted into the plate pressing port 7 as shown in FIG. 5, a cleaning sheet 16 made of, for example, polypropylene-rayon mixed paper having substantially the same shape as that of the pressing plate 13 is placed in the disk storage portion 12, and The peripheral portion of is partially heat-sealed to the upper case 1a.
Therefore, the pressing plate 13 is covered with the cleaning sheet 16 and has a shape.

As shown in FIG. 6, the inner surface of the lower case 1b is the upper case 1a.
At a position opposed to the plate pressing port 7, a receiving portion 18 which is higher than the general one is formed. Similar to the upper case 1a, the disk housing portion 12 is formed inside the lower case 1b by the regular ribs 11 provided at the four corners of the inner surface of the lower case 1b, and the magnetic disk is provided at a portion excluding the head insertion opening 5 and the receiving portion 18. Rib 1 that is concentric with the center of rotation 2
One or more 0s, preferably a plurality of 0s are provided.

As shown in FIG. 7, the disk storage portion 1 of the lower case 1b.
A cleaning sheet 16 having a substantially C-shape is also placed inside 2 so as to cover the receiving portion 18, and the peripheral portions thereof are partially heat-sealed 17.

As shown in FIGS. 6 and 7, small chevron protrusions 19 facing each other are formed near one corner of the lower case 1b, and a rectangular operation port 20 is formed in the vicinity thereof. A write protector 21 for preventing erroneous erasure is arranged from the operation port 20 to the chevron projection 19. As shown in FIG. 12, the light protector 21 has a main body 2
2 and a leg portion 23, the leg portion 23 elastically engages with the chevron protrusion 19 of the lower case 1b, and the operation protrusion 24 provided on the main body portion 22 is inserted into the operation port 20. There is.
The position of the light protector 21 shown in FIG. 7 is, for example, in a state in which writing (erasing) is not possible, and by sliding this light protector 21 along the longitudinal direction of the operation port 20, the tip end of the leg portion 23 has a chevron shape. The write protector 21 moves, for example, over the two ridges of the protrusion 19 to a writable (erasable) position.

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 26, a second face plate portion 27 provided so as to face the first face plate portion 26, and a connecting portion for connecting the front end portions of the double face plate portions 26, 27 to each other. 28, the side shape is U-shaped, and the planar shape is trapezoidal. The first face plate portion 26 and the second face plate portion 27 are
It is large enough to close the head insertion port 5.

The inner surface of the connecting portion 28 facing the cartridge case 1 is provided with two elastically deformable engaging projections 29 at predetermined intervals along the sliding direction of the shutter 3.
The engaging protrusion 29 includes a columnar portion 30 extending substantially vertically from the connecting portion 28 and an upper locking claw 31 provided at the tip of the columnar portion 30.
And a lower locking claw 32.

As shown in FIGS. 9, 10, and 11, a recess 34 is formed from a portion of the first face plate portion 26 to a portion of the connecting portion 28, and a contact wall 35 is formed at a side end thereof. It is provided.
The contact wall 35 is integrally connected to the inner surfaces of the first face plate portion 26, the second face plate portion 27, and the connecting portion 28 to reinforce the contact wall 35. This contact wall 35
As shown in FIG. 9, the outer surface of the shutter 3 which faces the recessed portion 34 is an opening member 36 of the shutter 3 provided in the recording / reproducing apparatus.
Is the contact surface against which the contact occurs. On the other hand, the inner surface of the contact wall 35 is a contact surface with which one end of a spring member 37 for elastically biasing the shutter 3 in the closing direction elastically contacts. Since the contact wall 35, the first face plate portion 26, the second face plate portion 27, and the connecting portion 28 form a blind path-shaped recess, the end of the spring member 37 inserted therein does not come off. .

FIG. 13 is a cross-sectional view showing the relationship between the distal end of one arm of the spring member 37 and the cartridge case. The spring member 37 has a space 38 provided between the upper case 1a and the lower case 1b.
In the torsion coil spring arranged inside, one arm 37a (not shown) engages with a part of the upper case 1a or the lower case 1b, and the other arm 37b has a gap of about 45 degrees with respect to the base. It has a bent portion 37c that is bent, reaches the inner wall surface side of the lower case 1b from the inner wall surface of the upper case 1a, is bent again 45 degrees, and extends upward. Therefore, the spring member 37 has an arm portion along the inner wall surface of the upper case 1a and an arm portion along the inner wall surface of the lower case 1b, and the bent portion 37c formed by the arm portion has a gap 38. Of the arm 37b in the width direction (thickness direction of the cartridge case) is regulated. The tip portion of the arm 37b is further bent by about 90 degrees and is positioned above the upper end portion of the upper case 1a, and the bent portion 37d engages with a part of the shutter 3 not shown.

FIG. 14 shows a modified example of the spring member 37.
(A) The figure shows a bent portion 37c formed in a semicircular shape,
The figure (b) shows the bent portion 37c formed in a triangular projecting shape, and the figure (c) shows the bent portion 37c formed in a quarter circle shape. In any of these embodiments, the arm 3
By virtue of the base portion 7b facing one side wall surface of the upper case 1a and the lower case 1b, and the tip of the bent portion 37c facing the other side wall surface, the deviation of the gap 38 in the width direction is prevented.

Next, the mounting of the spring member 37 and the shutter 3 will be described.

First, for the gap 38 formed between the joined upper and lower cases 1a and 1b, the torsion coil spring 37
Insert. At this time, since the opening has the same width as the width of the gap 38, the coil portion of the torsion coil spring 37 can be easily inserted. The torsion coil spring 37 has substantially the same width as the gap 38 due to the presence of the bent portion 37c, and therefore the position of the arm 37b is regulated in the gap 38 along one inner wall surface without shaking. . After inserting the torsion coil spring 37 and engaging one arm 37b with the upper case 1a or the lower case 1b, the shutter 3 is mounted from above.

In the shutter 3, the pair of face plate portions 26 and 27 are the upper case 1a,
Fitting on the recess 6 on the side surface of the lower case 1b, the locking claw 31,
32 is pushed and spread by the elasticity of the shutter 3 itself, gets over the ridge 33 and engages. As a result, the shutter is pulled out and held slidably in the recess 6. When the shutter 3 is attached, a part of the shutter 3 comes into contact with one arm 37b of the spring member 37, and the shutter 3 is always urged by the spring member 37 in the closing direction.

FIG. 15 shows a modified example of the mounting structure portion of the shutter 3, in which the notch 33a is formed in the protrusion 33 with which the locking claws 31 and 32 are engaged, and the protrusion 33 itself is provided with the cartridge case 1. The structure has elasticity in the plane direction. The notch 33a is of an oblique direction as shown in the figure, and the locking claws 31 and 32 of the shutter 3 are deformed from the oblique direction with respect to the cartridge case 1 inward. When a force in the falling direction is applied to the shutter 3 after mounting, for example, even if the elastic protrusion 33 is deformed outward, the protrusion 33 is fixed to the protrusion. Abut against each other to prevent further deformation, and eventually prevent the locking claws 31 and 32 from coming off.

By doing so, the elastic force of the shatter is deteriorated by mounting the face plate parts 26 and 27 of the shatter 3 while spreading the shatter 3, and the shatter face plate part 26, The holding power of 27 can be maintained sufficiently, and the shutter 3 does not fall off unnecessarily.

In the above-described embodiment, the case where the shutter 3 opens and closes only the head insertion 5 has been described, but it is also possible to make the shutter 3 that opens and closes both the head insertion opening 5 and the opening 4.

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.

The spring member may not always be biased in the closing direction but may be biased in the opening direction.

〔effect〕

According to the present invention, as described above, the bending portion is provided on one arm of the torsion coil spring that biases the shutter to regulate the position of the arm within the space.

Therefore, it is not necessary to form a rib for restricting the position of the spring member in the upper portion of the gap, and the opening of the gap can be made large, so that the spring member can be inserted easily and the assembly work efficiency is improved. Moreover, since the arm of the spring member does not shake, it can be reliably engaged with the shutter, and the operation of the shutter is also ensured.

[Brief description of drawings]

1 to 15 are views for explaining a magnetic disk cartridge according to an embodiment of the present invention. FIG. 1 is a plan view of the disk cartridge not in use, and FIG. FIG. 3 is a plan view of the upper case, FIG. 4 is a bottom view of the upper case, FIG. 5 is a bottom view of the upper case with a cleaning sheet attached, and FIG. FIG. 7 is a plan view of the lower case with a cleaning sheet attached, FIG. 8 is a bottom view of the lower case, FIG. 9 is an enlarged plan view of the shutter, and FIG. FIG. 11 is an enlarged front view, FIG. 11 is an enlarged right side view of the shutter, FIG. 12 is an enlarged perspective view of the light protector, and FIG. 13 is a partial cross-sectional view of a spring member arrangement portion.
14 (a), (b), and (c) are views showing a modification of the bent portion of the spring member, and FIG. 15 is a plan view showing a modification of the shutter engaging portion. 16 to 19 are for explaining a conventional magnetic disc cartridge, FIG. 16 is a perspective view of the magnetic disc cartridge, and FIG. 17 is a magnetic disc cartridge for explaining the position of a spring member. Top view of the lizard, 1st
FIG. 8 is a top view showing the relationship between the spring member and the cartridge case, and FIG. 19 is a similar front sectional view. 1 ... Cartridge case, 1a ... Upper case, 1b ...
… Lower case, 2… Magnetic disk, 3… Shatter, 5
...... Head insertion port, 37 ...... Spring member, 37a, 37b
……… Spring member arm, 37c …… Bending part, 38 …… Gap.

Claims (1)

[Claims] 1. A cartridge case including an upper case and a lower case that rotatably accommodate a disk, and a shutter that is slidably attached to a side surface of the cartridge case and that opens and closes a head insertion opening of the cartridge case. And a spring member that is housed in a space provided between the upper case and the lower case and has one arm engaged with the cartridge case and the other arm engaged with the shutter to constantly urge the shutter in one direction. A disc cartridge, wherein a torsion coil spring is used for the spring member, and one arm that engages with the shutter is
A disc cartridge which is integrally formed with a bent portion which is in contact with both inner wall surfaces of the gap and restricts a shake in a direction orthogonal to the movement direction of the arm.