JPH0543360U - Disk Cartridge - Google Patents

Abstract

(57) [Abstract] (Correction) [Purpose] To improve the accuracy of maintaining the predetermined angle of the lifter, reduce the number of parts, and improve the assemblability, even if the case is equipped with a lifter that presses and holds the disk-shaped medium. . [Configuration] The disk-like medium 1 in the synthetic resin case 2 rotatably accommodated, erected integrally and continuously with the root portion 3 ₂ a plate-shaped lifter 3 perpendicularly to the casing 2, the A disk cartridge in which the disk-shaped medium 1 is pressed by the free end 3 ₁ of the lifter 3, and the lifter 3 is attached to the case 2.
Is provided at a predetermined angle, and the lifter 3 is tilted and fixed to the angle setting table 12
The number of parts is reduced, the assembly is good, and it can be manufactured at low cost.
Accurately maintain the lifter's predetermined angle and maintain stable pressing force for a long period of time on a rotating disk-shaped medium, and prevent damage to the disk surface accurately, greatly improving durability and reliability. It can be improved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a disk cartridge in which a disk-shaped medium such as a magnetic disk or a floppy disk, a hard disk, a cleaning disk, an optical disk, a magneto-optical disk is rotatably housed in a case.

[0002]

[Prior Art]

 Generally, floppy disks, compact discs, or video discs used in digital data storage devices and video equipment are rotatably housed in a case to prevent dust and dirt from being scratched during handling. The lifter, which is an elastic member provided on the inner surface of the case and can be biased in one direction, contacts the sheet-like liner on the disk surface. In this conventional disc cartridge, the lifter in the case is made of a material different from that of the case, and for example, a metal plate having a fixing portion to the inner surface of the case bent or a synthetic resin film such as PET is used. It is fixed by crimping to the case, and the PET plate is attached to the case with double-sided adhesive tape.

[0003]

[Problems to be solved by the device]

 However, conventionally, as shown in FIG. 9, since the case a and the lifter b are configured as separate parts, the number of parts is increased and the assemblability is poor, and the fixing means c such as caulking or bonding is used to perform the fixing process. There is also a problem with the property, the cost is also expensive, and if it is a metal plate, the tip edge presses the disc, so even if there is a slight burr on the edge, the disc surface will be damaged. However, there is a problem in durability and reliability, and if the bent part is used for a long time with a PET plate, creep deformation occurs, the height of the pressing part becomes low and the pressing force of the disk decreases, and There was a drawback that the amount of deformation increased. The present invention is intended to properly eliminate these conventional defects, reduces the number of parts, is easy to assemble, and can be manufactured at low cost. (EN) Provided is a disc cartridge capable of maintaining a constant pressing force for a medium for a stable period of time, stably preventing damage to the disc surface, and significantly improving durability and reliability. The purpose is.

[0004]

[Means for Solving the Problems]

This invention is a synthetic resin case 2 for accommodating the disk-like medium 1 is rotatably and vertically integrally and continuously with the root portion 3 _second plate of the lifter 3 perpendicularly to the casing 2, A disc cartridge that presses the disc-shaped medium 1 with the free end 3 ₁ of the lifter 3, and an angle setting table 12 that holds the lifter 3 at a predetermined angle is provided in the case 2, and the angle setting table 12 is provided on the angle setting table 12. The lifter 3 is tilted and fixed.

[0005]

[Action]

In the disk cartridge of the present invention, the disk 1 in the case 2 is interposed between the pair of liners 4 and 4 and is fused on the angle setting table 12, respectively, and the free end 3 _{1 of the} lifter 3 maintaining a predetermined angle. It is pressed in a state of being held by, and maintains a constant pressing force for a long time at its contact portion, there is little local deformation of the disc 1, and it is used safely without damaging the recording surface of the disc 1. Recording and reproduction can be easily performed up to the outermost circumference of the disk 1, and reliability and accuracy can be sufficiently improved.

[0006]

【Example】

An embodiment in which the present invention is applied to a floppy disk cartridge will be described with reference to FIGS. 1 to 6, which is composed of a circular disk 1 serving as a recording medium, and an upper case and a lower case that rotatably accommodate the disk 1. In order to open and close the case 2 and the opening 6 for inserting the recording / reproducing head formed in the case 2, the cross section is made of metal (SUS) or plastic that opens and closes the opening 6 while holding the upper and lower surfaces of the case. A shutter 7 having a substantially U-shape is provided, and at least inner surface of the upper case and the lower case are provided with lifters 3 which are elastic and can be biased in one direction. 4 is configured to contact the surface of the disk 1. Immediately Chi, erected integrally and continuously with the root portion 3 _second plate of the lifter 3 perpendicular to the synthetic resin case 2, press the disc-shaped medium 1 at the free end 3 ₁ of the lifter 3 Therefore, the case 2 is provided with an angle setting table 12 for holding the lifter 3 at a predetermined angle, and the lifter 3 is laid down on the angle setting table 12 and fused by ultrasonic bonding or the like.

As the lifter 3, when the case 2 made of a synthetic resin such as polypropylene is molded, the lifter 3 is molded integrally with the case 2 into a plate shape so that one end becomes a free end 3 ₁ . it is constituted to root portion 3 ₂ of the other end it is continuous with the casing 2. In this case, the lifter 3 is vertically formed on the inner surface of the case 2, is bent by post-processing, and is fused on the angle setting base 12, and its free end 3 ₁ is brought close to the inner surface of the case. The disc is set to a predetermined angle so that a constant pressing force can be maintained for a long period of time without partial deformation or creep deformation of the disk. It should be noted that the angle setting table 12 is arranged so that the lifter 3 is located at a position where the free end 3 ₁ of the lifter 3 is separated so that the lifter 3 does not press the disk 1 at the table when the lifter 3 is fused. The deployment position is set.

Further, the root portion 3 ₂ of the lifter 3 is formed on a surface lower than the inner surface of the case, that is, a step portion or a slope 13 which forms a step for absorbing the thickness of the lifter 3 and is easily bent when the lifter 3 is fused. The shell is preferably formed in the recess 11. In order to facilitate a predetermined angle by bending the lifter 3 in post-processing, it is also Ru consideration is given to the elastic hinge portion includes a V groove on one or both sides of the root portion 3 ₂ of the lifter 3. Further, the lifter 3 which is a member different from the case 2 may be fixed, and the lifter 3 may be fixed on the angle setting table 12.

Further, as the angle setting table 12, when the length from the welding end to the tip of the lifter 3 is 10 mm and the plate thickness is 0.25 mm, the angle of the lifter fixing portion is 1 to 3 °. The proper angle for lightly contacting the free end 3 ₁ of the lifter 3 with the liner 10 is set in consideration of other dimensional relationships. In particular, the amount of displacement of the free end 3 ₁ of the lifter 3 is taken into consideration so that the disc 1 is optimally pressed through the liner 4 so that the amount of change of the disc 1 can be satisfactorily dealt with so that it is constant over a long period of time. The pressing force is kept. It is preferable that the angle setting table 12 is provided with welding ribs 14 as shown in FIGS. 4 and 5 at the time of molding and at the time of fusion as shown in FIG. The base 12 can be selected, or can be extended in the width direction.

In the embodiment of FIG. 7, the angle setting base 12 is provided with a doweled projection 15, and a fitting hole 16 for fitting and engaging with the projection 15 is provided on the lifter 3 side and fixed by a press-fitting method. In addition, as in the embodiment of FIG. 8, after the fitting hole 16 is inserted into the projection 17 provided on the angle setting base 12, the flange 18 is formed by caulking and fixed. You can also

In the figure, 5 is a slide area for the shutter, which is provided as a concave surface on the case surface. 7 ₁ shutter windows, 8 are used by adhering to the disk hub. 10 is a center plate.

[0012]

[Effect of the device]

 According to the present invention, in a synthetic resin case that rotatably accommodates a disk-shaped medium, a plate-shaped lifter is vertically arranged with respect to the case at the base portion thereof so as to be continuously erected upright, and a free end of the lifter is provided. It is a disc cartridge that presses the disc-shaped medium with an angle setting base that holds the lifter at a predetermined angle in the case, and the lifter is tilted and fixed to the angle setting base to reduce the number of parts. It is easy to assemble and can be manufactured at low cost, and the lifter can be maintained at a predetermined angle with good accuracy, and it is possible to maintain stable pressing and maintenance of a rotating disk-shaped medium for a long period of time with a constant pressing force. It is possible to prevent damage to the disc surface properly and greatly improve durability and reliability, and to use it without causing the lifter to press the liner against the disc for a long period of time. It can be used in a stable state without deteriorating the cleaning effect and head touch, and even when the disk-shaped medium moves up and down in the case, the level difference with the lifter is small and the amount of disk deformation is reduced to damage the disk surface. It is safe to use, practically useful, and easy to mold, and can be used without the risk of adverse effects on disk media.

[Submission date] May 14, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

Further, as the angle setting table 12, when the length from the welding end to the tip of the lifter 3 is 10 mm and the plate thickness is 0.25 mm, the angle of the lifter fixing portion is 1 to 3 °. proper angles for contacting lightly liner 10 to the free end 3 ₁ of the lifter 3 are set in consideration of the other dimensional relationships. In particular, the amount of displacement of the free end 3 ₁ of the lifter 3 is taken into consideration so that the disc 1 is optimally pressed through the liner 4 so that the amount of change of the disc 1 can be satisfactorily dealt with so that it is constant over a long period. The pressing force is kept. It is preferable that the angle setting table 12 is provided with welding ribs 14 as shown in FIGS. 4 and 5 at the time of molding and at the time of fusion as shown in FIG. The base 12 can be selected, or can be extended in the width direction. In this case, although the welding rib 14 is one chevron rib, a plurality of chevron ribs may be arranged, for example, the tips of the ribs may be thinned to form a saw-toothed notch to facilitate melting.

[Brief description of drawings]

FIG. 1 is a plan view of a lower case according to an embodiment of the present invention.

FIG. 2 is an enlarged vertical sectional view taken along the line AA of FIG.

FIG. 3 is a perspective view of a lifter unit according to the embodiment.

FIG. 4 is a vertical cross-sectional view of a lifter portion at the time of molding of an example.

5 is a plan view of the embodiment of FIG.

FIG. 6 is a perspective view of an embodiment in a separated state.

FIG. 7 is an enlarged view of a part of a lifter unit according to another embodiment of the present invention, in which A is a vertical sectional view when fixed, B is a vertical sectional view when molded, and C is a plan view of B.

FIG. 8 is an enlarged view of a part of a lifter unit according to still another embodiment of the present invention, in which A is a vertical sectional view at the time of fixing, B is a vertical sectional view at the time of molding, and C is a plan view of FIG.

FIG. 9 is a vertical sectional view of a conventional lifter section.

[Explanation of symbols]

1 Disc 2 Case 3 Lifter 3 ₁ Free End 3 ₂ Root 4 Liner 5 Slide Area 6 Opening 7 Shutter 11 Concave 12 Angle Setting Base 13 Slope 14 Welding Rib 15 Protrusion 16 Fitting Hole 17 Protrusion

Claims (4)

[Scope of utility model registration request] 1. A synthetic resin case rotatably accommodating a disk-shaped medium, and a plate-shaped lifter which is perpendicular to the case and is continuously provided upright at its root portion, and a free end of the lifter. And a disk cartridge for pressing the disk-shaped medium, wherein the case is provided with an angle setting base for holding the lifter at a predetermined angle, and the lifter is tilted and fixed on the angle setting base. . 2. The angle of inclination of the angle setting table is from 1 degree to 3 degrees.
The disk cartridge according to claim 1, wherein the disk cartridge is formed once. 3. The disc cartridge according to claim 1, wherein the angle setting table is provided with a fusion rib or an engaging projection for fixing a lifter on an upper surface thereof. 4. The disk cartridge according to claim 1, wherein the lifter is formed on an inclined surface of a recess provided in the case.