JPH09288876A - Disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disk cartridge which the cost and the time/labor for taking care of components are reduced, by unnecessitating the work to stick a guide plate pressing the surface of the free end part of a shutter, to a cartridge case and making the existing shutter usable. SOLUTION: The cartridge is provided with a synthetic resin cartridge case 2 for freely rotatably housing a recording medium 3 therein, recessed parts 6, 7 with the depth of (d) formed along one side edge of both surfaces of the cartridge case, an opening part 8 for head provided in the recessed parts, a shutter 10 with U-shaped section for opening/closing the head opening part mounted along the recessed parts so as to freely slide in the state across over one side edge of the cartridge case, and the guide plate 16 provided on at least one side for pressing the surface of the free end part of the shutter. In this case, the guide plate is formed integrally with the cartridge case, and also the depth of the part around the guide plate on the recessed parts is formed to be larger than (d).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disc cartridge used as a recording medium of an information recording / reproducing device such as a floppy disc device or an optical disc device.

[0002]

8 and 9 are perspective views showing an example of a conventional disk cartridge. The disc cartridge 101 is made of a synthetic resin cartridge case 102 that rotatably accommodates a disc-shaped recording medium 103 therein.
And one side edge 102a on both sides of the cartridge case 102.
A recess 104, 105 having a depth d formed along the groove, a head opening 106 provided in the recess 104, 105 for a recording / reproducing head of an information recording / reproducing apparatus to approach the recording medium 103, and a cartridge case. One side edge 102
A shutter 107 having a U-shaped cross section, which is slidably mounted along the concave portions 104 and 105 while straddling a, and which opens and closes a head opening 106, and a cartridge case 102.
And a guide plate 108 that is provided on one surface of the shutter 107 and presses the surface of the free end portion of the shutter 107. Guide plate 1
08 is formed of a member (for example, a metal plate) separate from the cartridge case 102, and is attached to the cartridge case 102 via a double-faced tape or the like. Since the guide plate 108 cannot be made too thick in terms of cost, it has a thickness of about 0.15 mm.

[0003]

In the above-mentioned conventional disc cartridge, the work of attaching the guide plate 108 to the cartridge case 102 is very time-consuming, which causes a cost increase.
It is considered that the guide plate 108 is integrally molded with the cartridge case 102. When the guide plate 108 is integrally molded, it is difficult to perform injection molding with the above thickness and there is also a problem in strength, so it is necessary to thicken the guide plate 108. In this case, if the guide plate 108 is thickened to the outside, the guide plate 108 may be caught when the disc cartridge is loaded in the information recording / reproducing apparatus. Therefore, the guide plate 108 must be thickened to the inside. However, if the shutter 107 is newly designed in accordance with this, cost such as mold cost is increased and cost rises, and the newly-made shutter has to be used separately from the existing shutter, so that management of parts is complicated. There is a problem that becomes.

The present invention has been made for the purpose of providing a disk cartridge which solves the above problems and reduces the cost and labor of parts management.

[0005]

In order to achieve the above object, a disk cartridge according to a first aspect of the present invention comprises a cartridge case made of a synthetic resin for rotatably accommodating a disk-shaped recording medium therein, and the cartridge. A recess having a depth d formed on both sides of the case along one side edge, a head opening provided in the recess, and the recess along the one side edge of the cartridge case along the recess. A disk provided with a shutter that is slidably mounted and has a U-shaped cross section that opens and closes the head opening, and a guide plate that is provided on at least one surface of the cartridge case and presses the surface of the free end of the shutter. In the cartridge, the guide plate is integrally molded with the cartridge case, and the concave portion of the surface on which the guide plate is provided,
It is characterized in that the peripheral portion of the guide plate is formed to have a depth larger than the above d.

According to a second aspect of the present invention, there is provided the disk cartridge according to the first aspect, wherein the bottom surface around the guide plate in the recess of the surface provided with the guide plate is the guide plate. It is characterized in that it is formed in a state of being inclined inward.

By doing so, the flow of the molten resin at the time of injection molding becomes smooth, and the moldability is improved. Moreover, since the depth of the recess changes continuously, the mechanical strength of the recess is improved, and the appearance of the recess is improved because the change in the depth of the recess is less noticeable.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. 1 to 7 are views showing an embodiment in which the present invention is applied to a 3.5-inch disk cartridge. FIG. 1 is a plan view, FIGS.
4 is a view of the half forming the bottom side of the cartridge case viewed from the front side, FIG. 5 is a view of the half of FIG. 4 viewed from the back side, FIG. 6 is a sectional view taken along the line AA ′ of FIG. 4, and FIG. B- in FIG.
It is a sectional view taken on the line B '.

As shown in FIGS. 1 to 3, the disc cartridge 1 is provided with a cartridge case 2 in which a disc-shaped recording medium 3 is rotatably accommodated. The cartridge case 2 is formed by a pair of upper and lower hard synthetic resin halves 4 and 5 facing each other.
Rectangular recesses 6 and 7 are formed along a. The recesses 6 and 7 are provided with a head opening 8 for allowing the recording / reproducing head of the information recording / reproducing apparatus to approach the recording medium 3. Further, in this embodiment, the drive shaft opening 9 for inserting the drive shaft of the information recording / reproducing apparatus which is attached to / detached from the center hole of the recording medium 3 is provided in the recess 7 on the bottom surface side. The drive shaft opening 9 is formed integrally with the head opening 8.

At one side edge 2a of the cartridge case 2,
A shutter 10 for opening and closing the head opening 8 and the drive shaft opening 9 is attached. The shutter 10 is made of a stainless steel plate having a thickness of 0.3 mm, and is formed in a U-shaped section including a pair of rectangular facing walls 11 and 12 facing each other and a connecting wall 13 connecting one ends of these to each other. A slider 14 made of a synthetic resin is slidably attached along one side edge 2a of the cartridge case 2 and is screwed while straddling the one side edge 2a. As the shutter 10, the conventional disc cartridge shown in FIGS. 8 and 9 is used as it is.

The shutter 10 is moved by the slider 14
It is slidably guided along the recesses 6, 7 and closes the head opening 8 and the drive shaft opening 9 when in the position of FIG. 2 and the head opening when in the position of FIG. 8 and the drive shaft opening 9 are opened. The slider 14 is elastically biased in the closing direction (leftward in FIG. 2) by a spring 15, and the head opening 8 and the drive shaft opening 9 are closed by a shutter 10 when not in use.

Reference numeral 16 is a guide plate for pressing the surface of the free end 12a of the opposing wall 12 of the shutter 10 and is integrally formed with the half 5. The guide plate 16 has a thickness of 0.4 mm,
It is provided at one end of the recess 7 so as to be flush with the surface of the half 5. The recess 7 is provided with a through hole 17 facing the guide plate 16, and the through hole 17 is provided.
Is slightly larger than the guide plate 16 as shown in FIGS. By providing the through hole 17, the guide plate 16 can be formed only by butting the fixed side and the movable side of the mold, and the mold does not need to have a sliding structure, so the cost of the mold can be reduced. be able to.

The concave portion 7 has a solid portion 7a shown in FIG.
At the same depth (0.6 mm) as the depth d of the concave portion 105 of the conventional disc cartridge 101 shown in FIGS. 8 and 9, the dot portion 7b is inward in the direction in which the bottom surface faces the guide plate 16 (direction of arrow). It is formed in an inclined state with a depth of 0.6
The depth gradually increases from 0.8 mm to 0.85 mm (see FIGS. 6 and 7), and the mesh portion 7c has a depth of 0.85 mm.

The shutter 10 is the same as the shutter 107 of the conventional disc cartridge 101 shown in FIGS. 8 and 9, and the guide plate 16 is thicker than the guide plate 108 of the conventional disc cartridge 101. When the slider 14 is attached in the same manner as the cartridge 101, the opposing wall 1 of the shutter 10
Although the tip end surface of the free end portion 12a of No. 2 hits the tip end surface of the guide plate 16, the shutter 10 cannot be attached.
Since the dot portion 7b and the mesh portion 7c are deep, the portion of the facing wall 12 on the side of the free end 12a can be inclined inward as shown in FIG.
Can be inserted into the back side of the guide plate 16.

Further, in the present embodiment, the dot portion 7b
Is formed so as to be inwardly inclined toward the guide plate 16, so that the flow of the molten resin during injection molding is smooth and the moldability is good. Further, since the recess 7 is formed in this manner, the depth of the recess 7 changes continuously, so that the bottom surface of the recess 7 has high mechanical strength and the change in the depth of the recess is not noticeable. Is good.

[0016]

As described above, according to the present invention,
Since the work of attaching the guide plate to the cartridge case is unnecessary and the shutter need not be newly formed, the cost and the labor required for parts management can be reduced.

According to the second aspect of the invention, the bottom surface around the guide plate in the concave portion of the surface provided with the guide plate is formed so as to be inclined inwardly toward the guide plate. The flow of molten resin during injection molding becomes smooth, and moldability is improved. Further, since the depth of the recess changes continuously, the mechanical strength of the bottom surface of the recess is improved, and the change of the depth of the recess is less noticeable, so that the appearance is improved.

[Brief description of drawings]

FIG. 1 is a plan view of a disk cartridge according to an embodiment of the present invention.

FIG. 2 is a bottom view of the disk cartridge of FIG. 1;

3 is a bottom view of the disc cartridge shown in FIG. 1. FIG.

FIG. 4 is a view of a half forming the bottom surface side of the cartridge case as seen from the front side.

FIG. 5 is a view of the half of FIG. 4 viewed from the back side.

6 is a cross-sectional view taken along the line A-A ′ of FIG.

7 is a sectional view taken along line B-B ′ of FIG.

FIG. 8 is a perspective view of a conventional disk cartridge viewed from the front side.

FIG. 9 is a perspective view of the disk cartridge of FIG. 8 as viewed from the back side.

[Explanation of symbols]

 1 Disc Cartridge 2 Cartridge Case 3 Recording Medium 6, 7 Recess 8 Head Opening 10 Shutter 16 Guide Plate

Claims (2)

[Claims] 1. A cartridge case made of synthetic resin for rotatably accommodating a disk-shaped recording medium therein, a recess having a depth d formed along one side edge on both sides of the cartridge case, and the recess. An opening for the head provided inside,
Provided on at least one surface of the cartridge case, a shutter having a U-shaped cross section, which is slidably attached along the concave portion while straddling one side edge of the cartridge case and opens and closes the head opening. In a disk cartridge provided with a guide plate for pressing the surface of the free end portion of the shutter, the guide plate is integrally molded with the cartridge case, and the concave portion of the surface on which the guide plate is provided has the guide plate. A disk cartridge characterized in that the peripheral portion of the disk cartridge is formed to have a depth larger than the above-mentioned d. 2. The bottom surface around the guide plate in the recess of the surface on which the guide plate is provided is formed so as to be inclined inward toward the guide plate. The described disc cartridge.