JPH10283748A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a projecting part from being deformed even if the thickness of a shutter is thinned or the shutter is formed, for example, by aluminum alloy by reinforcing the projecting part being connected to the short-side part of the end face plate part of the shutter with a reinforcing part. SOLUTION: A disk cartridge 1 has a disk 2, a shell 3 that accommodates the disk 2 rotatably, and a shutter 4 that is mounted to the shell 3 slidably. The shutter 4 has a square-shaped end face plate part 41 that moves along the front end face of the shell 3 and projecting parts 44 and 45 that are connected to the long-side part of the end face plate part 41, travel along the upper and lower surfaces of the shell 3, are provided at the short-side part of lower surface plate parts 42 and 43 and the end face plate part 41, and project toward the outside from the side part of the lower surface plate parts 42 and 43. The shutter 4 has reinforcing parts 51 and 52 for reinforcing the projecting parts 44 and 45.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter in which a shutter is slidably mounted on a shell which rotatably accommodates a disk, and an opening for recording / reproducing of the shell and an opening for driving rotation of the disk are opened and closed by the shutter. This is related to the disk cartridge that is being used.

[0002]

2. Description of the Related Art FIGS.
The one shown in FIG. 16 is known. The disk cartridge 101 includes a disk 102 as a recording medium.
And the shell 1 that rotatably houses the disk 102
And a shutter 104 slidably attached to the shell 103 to open and close a recording / reproducing opening 103a provided on the upper and lower surfaces of the shell 103 and a disk rotation driving opening 103b provided on the lower surface of the shell 103. It has.

[0003] The shutter 104 is connected to the shell 10.
3 that moves along the front end surface of the rectangular end surface plate portion 104a
Are connected to a pair of long sides of the end face plate portion 104a, and move along the upper and lower surfaces of the shell 103 to form recording / reproducing openings 103a and disks provided on the upper and lower surfaces of the shell 103. Upper and lower plate portions 104b and 104c for opening and closing the opening 103b for rotational drive;
The upper and lower plate portions 104b, 104c are provided with first and second protrusion portions 104d, 104e projecting outward from both side portions of the upper and lower plate portions 104b, 104c.

[0004] The first and second projections 104d, 104
e is a width W ₂ substantially half of the width W ₁ of the end face plate portion 104a.
Is formed. The first protrusion 104d is used as a slide guide for slidably attaching the shutter 104 to the shell 103. The second protrusion 104d is used as a slide guide in addition to the slide guide.
The shutter 104 is used as a lock member engaging portion for engaging with a shutter lock member (not shown) provided in the shell 103 and maintaining the shutter 104 in a closed state.

[0005] The shutter 104 is formed by bending a metal plate such as an aluminum alloy or stainless steel into a U-shape.

[0006]

As described above, the conventional disk cartridge 101 has the first and second protrusions connected to a pair of short sides of the rectangular end plate 104a of the shutter 104 as described above. Since the portions 104d and 104e are used as a slide guide portion and a lock member engaging portion of the shutter 104, there are the following problems (problems).

(1) The first and second protrusions 104d,
104e is easily deformed. In particular, when aluminum is used as the shutter material or the thickness of the shutter material is reduced to reduce the weight of the shutter 104, the first and second protrusions 104d and 104e are used.
Are more easily deformed, and are easily deformed by pressure at the time of opening and closing, impact at the time of dropping, and the like. The reason why the strength (rigidity) becomes extremely weak when the thickness of the shutter material is reduced is that the second moment of area decreases. For example, the thickness of the shutter material is reduced from 0.2 mm to 0.15 m.
If m, the strength is reduced by as much as 65%.

(2) The first and second protrusions 104d,
When the first projection 104e is deformed, the first and second projections 10
4d and 104e lose their function as a slide guide portion or a lock member engaging portion, and the shutter 104 cannot be opened or closed or the shutter 104 cannot be locked.

The present invention has been made to solve the above-mentioned conventional problems.

[0010]

SUMMARY OF THE INVENTION The present invention comprises a disk,
It has a shell that rotatably houses the disk and a shutter that is slidably mounted on the shell,
The shutter is connected to a rectangular end plate moving along the front end surface of the shell and a long side of the end plate, and moves up and down along the upper and lower surfaces of the shell. In a disk cartridge having a face plate portion and a protruding portion continuously provided on a short side of the end face plate portion and protruding outward from side portions of the upper and lower face plate portions, the shutter includes: A reinforcing portion for reinforcing the protruding portion is provided.

Accordingly, the protruding portion is reinforced by the reinforcing portion, so that the strength (rigidity) of the protruding portion is increased, and the protruding portion is hardly deformed.

[0012]

FIG. 1 to FIG. 6 show a first embodiment. FIG. 1 is a perspective view of the disk cartridge 1.

The disk cartridge 1 includes a disk 2 as a recording medium, a shell 3 for rotatably storing the disk 2, and a shutter 4 slidably mounted on the shell 3.

The shutter 4 includes a rectangular end plate 41 that moves along the front end surface (the end surface in the direction of insertion into the recording / reproducing apparatus) of the shell 3, and a pair of long sides of the end plate 41. The upper and lower plate portions 42 and 43, which move along the upper and lower surfaces of the shell 3, are connected to a pair of short sides of the end plate portion 41, and are connected to the upper surface. , Which protrude outward from the left and right side portions of the lower plate portions 42 and 43.
It has the second protrusions 44 and 45.

The shutter 4 is provided with the first protrusion 4
A first reinforcing portion 51 for reinforcing the first protrusion 4 and the second protrusion 4
5 has a second reinforcing portion 52.

Next, the disc 2, the shell 3, and the shutter 4 will be described in detail with reference to the exploded perspective view of FIG.

The disk 2 includes a recording medium main body (hereinafter, referred to as a disk main body) 21 and a disk main body 2.
1 and a center hub 22 attached to the central portion.

The disk body 21 is made of polycarbonate, polystyrene, polyolefin, norbornene,
It is made of a synthetic resin such as polymetal methacrylate, aluminum, or glass, and is formed in a disk shape having a hub mounting hole 21a at a central portion. A magnetic recording layer or an optical disk is formed on the main surface so as to surround the hub mounting hole 21a. A signal recording section 21b such as a magnetic recording layer or an optical recording layer is provided.

The center hub 22 is made of a metal such as stainless steel having magnetism (magnetic attraction) and is attached to the center of the disk main body 21 by using the hub mounting hole 21a. I have.

The shell 3 is formed in a flat casing shape by joining the peripheral walls 33, 33 of the upper half 31 and the lower half 32 while abutting each other.

The upper half 31 has a shutter mounting recess (shutter slide area) 34 on the upper surface (outer surface) on the front end surface side, and has a recording / reproducing opening 35 on one side of the recess 34. doing.

The lower half 32 has a recess (shutter slide area) 36 for mounting the shutter on the lower surface (outer surface) on the front end side, and is located on one side of the recess 36 for mounting the shutter. The half 31 has a recording / reproducing opening 37 at a position facing the recording / reproducing opening 35, and has a disk rotation driving opening 38 at the center. The lower half 32 has a circular rib 39 on the upper surface (inner surface) centered on the opening 38 for driving the rotation of the disk.

The shell 3 is formed by inserting the disk 2 into the circular rib 39 of the lower half 32, and then superimposing the upper half 31 on the lower half 32 and joining it. The disk 2 is rotatably accommodated, and the lower end of the center hub 22 of the disk 2 faces the disk drive opening 38 of the lower half 32.
The upper and lower halves of the signal recording section 21b
The recording / reproducing openings 35 and 37 of the recording / reproducing device 1 and 32 are exposed. The upper and lower halves 31, 32 are ABS
It is made of a thermoplastic synthetic resin such as polycarbonate or polycarbonate, and is joined to each other by ultrasonic welding.

Next, the shutter 4 will be described. As described above, the shutter 4 includes a rectangular end plate 41 that moves along the front end surface (the end surface in the direction of insertion into the recording / reproducing apparatus) of the shell 3, and a pair of long end plates 41. The upper and lower plate portions 42 and 43 moving along the upper and lower surfaces of the shell 3 and the pair of short sides of the end plate portion 41 are connected to the side of the shell 3. The first and first projections projecting outward from the left and right side portions of the upper and lower plate portions 42 and 43.
It has the second protrusions 44 and 45. Shell 4 above
Is a first reinforcing portion 51 for reinforcing the first projecting portion 44.
And a second reinforcing portion 52 for reinforcing the second projecting portion 45.

The first and second projecting portions 44 and 45 are formed to have a width W ₂ which is approximately の of the width W ₁ of the end face plate portion 41.

The second protrusion 45 is provided with the first protrusion 4
Several times a fourth length L ₁ is formed to a length L _2.

On the first and second protrusions 44 and 45,
The lower end has a pair of upper and lower first and second slide guides extending substantially parallel to the upper and lower plates 42 and 43.
Are provided at the tip of the second bent portion 47 as engaging claw portions extending substantially at right angles toward the first bent portion 46 side. A third bent portion 48 is provided.

At substantially the center of the first bent portion 46 of the second protruding portion 45, there is provided a lock member engaging portion 49 with which a shutter lock member described later is engaged.

The shutter 4 has upper and lower shutter mounting recesses 34 and 36 on the upper and lower surfaces of the shell 3 and upper and lower plate portions 4 respectively.
2 and 43 and the first and second protrusions 4
4, 45, the first bent portion 46 is sandwiched between the upper and lower halves 31, 32, and the second bent portion 47 is brought into contact with the lower surface of the lower half 32. By fitting the portion 48 into a groove (not shown) provided on the lower surface of the lower half 32, the portion 48 is slidably mounted on the shell 3 and slides to one side of the shutter mounting recesses 34, 36. Then, the recording and reproducing openings 35 and 37 are opened, and the recording and reproducing openings 35 and 37 are closed by the upper and lower plate portions 42 and 43, and the shutter lock is performed. It is designed to be locked by a member.

The first reinforcing portion 51 for reinforcing the first projecting portion 44 extends from the first projecting portion 44 to the end face plate portion 41. The second reinforcing portion 52 for reinforcing the second projecting portion 45 is formed so as to extend from the second projecting portion 45 to the end face plate portion 41.

The first and second reinforcing portions 51 and 52 are formed by providing the shutter 41 with ribs having a concave and convex shape having a substantially arc-shaped cross section. The uneven ribs are formed by denting the outer surface of the shutter 4 and projecting the inner surface of the shutter 4.

Next, a method of manufacturing the shutter 4 will be described. For manufacturing the shutter 4, a manufacturing apparatus 201 as shown in FIG. 5 is used.

The manufacturing apparatus 201 has a thickness of 0.15 to 0.1 mm such as stainless steel or aluminum wound in a roll shape.
A raw plate feeding device 203 that feeds a 3 mm thin metal raw plate 202, and a straightening device (leveler) that flattens the bending of the raw plate 202 sent out by the raw plate feeding device 203 and flattens it.
And a press device 205 that presses the raw material plate 202 corrected by the straightening device 204.

The press device 205 has a punch 206, a die 207, and a shutter accumulating unit 208, and performs the first to seventh steps as shown in FIG.

In the first step, a rectangular notch (a notch located at the center of the end plate 41 of the shutter 4) 61 in the raw material plate 202 and the raw material plate 202 in the press device 205 are precisely formed. The circular pilot holes 62 and 63 for feeding are punched out.

In the second step, the raw plate 202
Then, the first and second reinforcing portions 51 and 52 are formed. The first and second reinforcing portions 51 and 52 are formed by providing uneven ribs on the raw material plate 202. Therefore, when forming the uneven ribs, the first and second reinforcing portions 51 and 52 are used.
Since the elongation occurs slightly in 02, it is possible to manufacture the shutter 4 with high dimensional accuracy by forming the first and second reinforcing portions 51 and 52 at an early stage.

In the third step, the raw plate 202
, The front plate 41 and the upper and lower plate 4
A so-called outside punching step of punching 2, 43 is performed.

In the fourth step, the lower ends of the first projecting portion 44 and the 21st projecting portion 45 are bent at substantially right angles at the bent portion 61 to form the third bent portion 48.

In the fifth step, the upper ends of the first projecting portion 44 and the second projecting portion 45 are bent at substantially right angles at the bent portion 62 to form the first bent portion 46. ,
A lock member engaging portion 49 is formed substantially at the center of the first bent portion 46 of the second projecting portion 45.

In the sixth step, the upper end of the end plate 41 is bent at a substantially right angle at the bent portion 63 to form the upper plate 42, and the lower end of the end plate 41 is bent at the bent portion 64.
And the lower surface plate portion 43 is formed at the same time, and at the same time, the lower ends of the first and second protrusions 44 and 45 are bent at a substantially right angle by the bending member 65 to form the second fold. A curved portion 47 is formed.

In a seventh step (not shown), the shutters subjected to the above-described first to sixth steps are cut off from the original plate 202 and separated as individual shutters.

In FIG. 2, a shutter lock member 71 is rotatably attached to the lower half 32, and the shutter lock member 71 is engaged with the lock member of the second protrusion 45 of the shutter 4. The shutter 4 is maintained in a closed state by engaging with the joint 49. An erroneous erasure member 72 is slidably attached to the lower half 32.

The tape cartridge 1 according to the first embodiment
Has the configuration as described above, and the end face plate portion 4 of the shutter 4
The first and second reinforcing portions 51 and 52 for reinforcing the first and second projecting portions 44 and 45 provided continuously on the short side of the first end plate from the first and second projecting portions 44 and 45 are provided. The first and second protrusions 44 and 45 are bent and deformed at the boundary between the end plate 41 and the shutter 4 when the shutter 4 is assembled to the shell 3. Can be prevented. In addition, after the shutter 4 is assembled to the shell 3, it is possible to prevent the first and second protrusions 44 and 45 from being deformed when the shutter 4 is slid. If the disc cartridge 1 is accidentally dropped while the shutter 4 is locked by the shutter lock member 71, a lock member engaging portion 49 with which the shutter lock member 71 is engaged is provided. Although a large force (impact) is applied to the second protruding portion 45, the deformation of the second protruding portion 45 can be prevented by the second reinforcing portion 52. In addition, since the first and second reinforcing portions 51 and 52 are formed of uneven ribs protruding from the outer surface side to the inner surface side of the shutter 4, the first and second reinforcing portions 51 and 52 can be easily formed in the middle of the shutter manufacturing process as described above. First and second reinforcing portions 51 and 52 can be formed.

FIGS. 7 and 8 show a disk cartridge according to a second embodiment. In the disk cartridge of the second embodiment, the shutter 4 of the disk cartridge of the first embodiment is provided with third and fourth reinforcing portions 53 and 54 for reinforcing the upper and lower plate portions 42 and 43. Show the case.

The third reinforcing portion 53 is formed along the periphery of the upper surface plate portion 42 of the shutter 4, and has one end connected to the first reinforcing portion 51 and the other end connected to the second reinforcing portion 51. Are connected to the reinforcing portion 52.

The first to fourth reinforcing portions 51 to 54 are formed by denting the outer surface side of the shutter 4 and projecting it to the inner surface side to provide uneven ribs.
Other configurations are the same as those in the first embodiment.

The disk cartridge of the second embodiment has the above-described structure, and the upper and lower plate portions 42 and 43 of the shutter 4 are also reinforced by the third and fourth reinforcing portions 53 and 54. become. Further, the third and fourth reinforcing portions 5
The third and fourth reinforcing portions 53 and 54 are formed on the upper and lower surfaces of the shell 3 by forming the concave and convex ribs 3 and 54 on the outer surface side of the shutter 4 and on the inner surface side. The friction between the shutter mounting recesses 34 and 36 and the entire inner surface of the shutter 4 is brought into contact with the shutter mounting recesses 34 and 36, so that the shutter 4 slides smoothly with the shutter 4. be able to.

In the above-described first and second embodiments, the first to fourth reinforcing portions 51 to 54 are concave and convex ribs that depress the outer side of the shutter 4 and protrude toward the inner side. Although the case where the shutter 4 is formed is shown, as shown in FIG. 9, the shutter 4 may be formed by a concave-convex rib which is depressed on the inner side and protrudes on the outer side. In the first and second embodiments, the first and fourth reinforcing portions 51 to 54 are formed in an arc-shaped cross-sectional shape.
As shown in (C), the first to fourth reinforcing portions 51 to 51 are provided.
The cross-sectional shape of 54 may be a triangular shape, a trapezoidal shape, a shape in which two arcs are continuous, or a combination thereof.

FIGS. 11 to 12 show a disk cartridge according to a third embodiment. In the disk cartridge according to the third embodiment, the first reinforcing portion 51 includes the edge plate portion 55 of the end face plate portion 41 and the lower surface plate portion 43 of the shutter 4 and the first projecting portion 44 continuous with the edge line portion 55. Second
Is formed so as to straddle the ridge line portion 56 of the bent portion 47 of
The second reinforcing portion 52 is provided at the end face plate portion 41 of the shutter 4.
Line portion 55 of the lower surface plate portion 53 and the ridge line portion 55
Is formed so as to straddle the second protruding portion 45 and the ridge portion 57 of the second bent portion 47.

As shown in FIGS. 13 (A) and 13 (B), the first and second reinforcing portions 51 and 52 use a punch 211 and a die 212 having a flat tip end surface 211a. Ridge portions 55, 56 and ridge portions 55,
By compressing the shutter 57 at an angle of approximately 45 ° with respect to the end surface plate portion 41 and the lower surface plate portion 43 of the shutter 4, or by compressing the tip end as shown in FIGS. Using the punch 213 and the die 212 whose surfaces 213a are substantially perpendicular to each other, the ridges 55 and 56 and the ridges 55 and 57 of the shutter 4 are connected to the end plate 41 of the shutter 4.
And it is formed by compressing at a substantially right angle to the lower surface plate portion 43.

Due to the compression, the ridge portion is plastically deformed and hardened to become the first and second reinforcing portions 51 and 52, and the deformation of the first and second projecting portions 44 and 45 is prevented. Prevent it. Further, as shown in FIG. 13 (A), raw plate extension force F ₁ is generated on the outer surface side of the edge line portion formed by bending, compressive force F ₂ is generated on the inner surface In order to perform the operation, the shutter 4
Although the openings of the shutters 3 and 44 are easy to spread, the extension force F ₁ is reduced by the first and second reinforcing portions 51 and 52 formed by the compression, and the upper and lower plates 43 and 43 of the shutter 4 are reduced. The opening of the opening 44 can be prevented from expanding. Other configurations are substantially the same as those of the disk cartridges of the first and second embodiments, and therefore, the same components are denoted by the same reference numerals, and redundant description will be omitted.

[0052]

The disk cartridge of the present invention has the following effects.

(1) In the disk cartridge of the first aspect, since the protruding portion connected to the short side of the end face plate portion of the shutter is reinforced by the reinforcing portion, the thickness of the shutter can be reduced or the shutter can be made of aluminum. Even when formed of an alloy or the like, the deformation of the protruding portion can be prevented.

(2) In the disk cartridge of the second aspect, since the reinforcing portion is formed so as to extend from the projecting portion to the end face plate portion, deformation of the boundary portion between the projecting portion and the end face plate portion which is most easily deformed is prevented. can do.

(3) In the disk cartridge of the third aspect, since the reinforcing portion is formed by providing uneven ribs, it can be easily formed by subjecting the raw material plate to press working or the like.

(4) In the disk cartridge according to the fourth aspect of the present invention, the concave and convex ribs as reinforcing portions are formed by making the outer surface of the shutter concave and projecting to the inner surface thereof. The shutter can be slid smoothly by reducing the contact area (friction).

(5) In the disk cartridge according to the fifth aspect, not only the projecting portion of the shutter but also the upper and lower plate portions can be reinforced to prevent deformation of the upper and lower plate portions.

(6) In the disk cartridge of the sixth aspect, the reinforcing portions are formed at the ridge portions of the end plate, the upper and lower plate portions, and the bent portions of the protruding portions connected thereto, so that the presence of the reinforcing portions stands out. Can be none.

(7) In the disk cartridge according to the seventh aspect, since the reinforcing portion is formed by compressing the ridge portion and the bent portion connected thereto, it is possible to prevent the opening of the upper and lower plate portions of the shutter from expanding. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a perspective view (first embodiment).

FIG. 2 is an exploded perspective view.

FIG. 3 is a perspective view of a shutter.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a schematic side view of a shutter manufacturing device.

FIG. 6 is a manufacturing process diagram of the shutter.

FIG. 7 is a perspective view (second embodiment).

FIG. 8 is a perspective view of a shutter.

FIG. 9 is a sectional view taken along line AA of FIG. 8;

FIGS. 10A, 10B, and 10C are cross-sectional views of modified examples of the reinforcing portion.

FIG. 11 is a perspective view (third embodiment).

FIG. 12 is a perspective view of a shutter.

13A and 13B are process diagrams of forming a reinforcing portion.

14A and 14B are process diagrams of forming a reinforcing portion.

FIG. 15 is a perspective view of a conventional example.

FIG. 16 is an enlarged perspective view of a shutter.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Disc cartridge, 2 ... Disk, 3 ... Shell, 4 ... Shutter, 41 ... End face plate part, 42, 43 ...
Upper and lower plate parts, 44, 45 ... first and second projection parts, 5
1,52 ... First and second reinforcing portions.

Claims (7)

[Claims] 1. A disk comprising: a disk; a shell rotatably storing the disk; and a shutter slidably mounted on the shell, wherein the shutter moves along a front end surface of the shell. And an upper and lower plate moving along the upper and lower surfaces of the shell, and a short side of the end plate, A disk cartridge having a projection protruding outside of the side portions of the upper and lower plate portions, wherein the shutter has a reinforcing portion for reinforcing the projection. 2. The disk cartridge according to claim 1, wherein the reinforcing portion is formed so as to extend from the protruding portion to the end face plate portion. 3. The disk cartridge according to claim 2, wherein the reinforcing portion is formed by providing an uneven rib on the shutter. 4. The disk cartridge according to claim 3, wherein the concave and convex ribs are formed by denting the outer surface of the shutter and projecting the inner surface of the shutter. 5. The disk cartridge according to claim 1, wherein the reinforcing portion is formed so as to extend over the projecting portion of the shutter, the end face plate portion, and the upper and lower plate portions. 6. The method according to claim 1, wherein the reinforcing portion is formed at a ridge portion between the upper and lower plate portions and the end face plate portion of the shutter and a bent portion of a protruding portion connected to the ridge portion. Characterized disk cartridge. 7. The reinforcing portion according to claim 6, wherein the reinforcing portion is formed by pressurizing and compressing the ridge portions of the upper and lower plate portions and the end face plate portion of the shutter, and the bent portion of the projecting portion connected to the ridge portion. A disk cartridge characterized by the following.