JPH0725906Y2 - cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a cartridge such as a hard disk, particularly a disk cartridge in which a magnetic disk is rotatably housed in a case.

[Conventional technology]

For handling compact discs, video discs, or digital compact cassettes that are generally used in video and other digital data storage devices and video cameras, a tray system or cartridge system that uses a case is used to prevent dust and dirt from being scratched during handling. In addition, a metal shutter for sliding is provided to cover the head insertion window provided in the case when not in use and expose the door when the head insertion window is open.

This shutter is a plate body having a U-shaped cross-section, and upper and lower plate surfaces are provided with projecting retaining pieces that are inserted into guide grooves formed in the case so as to slide while holding the cassette. The guide is made on the case, but since the retaining piece was made of a cut-and-raised piece bent into an L-shape on the shutter, the edge of the retaining piece abuts the bottom or side wall of the guide groove, and the shutter slides. However, there was a problem that it was not smooth and the guide groove was scraped.

For this reason, conventionally, in addition to the retaining piece, it has been attempted to use a protruding piece together with a guide piece that can surely prevent the shutter from coming off and smoothly slide the shutter.

[Problems to be solved by the invention]

However, even in this conventional disk cartridge equipped with an improved shutter, the guide piece that is also used as the stopper piece is a cut-and-raised member that breaks and separates both sides, so that there are notched holes on both sides of the guide piece. There is a problem that the guide groove of the case is scraped when sliding. Especially when the shutter is tilted either upwards or downwards, it is easy to have a problem of scraping the side surface of the guide groove of the case, and there is also a problem that burrs at the breaks on both ends also scrape the bottom surface of the case guide groove. However, there was a lot of dust generation in the case, which was not satisfactory.

The present invention is intended to eliminate these drawbacks of the related art, does not have a shaving phenomenon that is likely to occur, guarantees a smooth sliding operation of the shutter, and can reliably prevent the shutter from being pulled out. The purpose is to provide a high cartridge.

[Means for solving problems]

According to the present invention, a case 2 for accommodating a recording medium 1 so that information can be recorded or reproduced, and a guide groove 5 in which the upper and lower surfaces of the case 2 are sandwiched to open and close a recording / reproducing head insertion window portion 3 formed in the case 2. And a shutter 4 that slides along the guide groove 5, and a slide guide protrusion 6 and a retaining piece 7 that are inserted into the guide groove 5 project inside the shutter 4. 6 are provided on both sides of the shutter 4, and the entire circumferences of the base ends of the sliding guide protrusions 6 are continuous with the shutter wall to be bulged to form a rectangular shape having long sides in the longitudinal direction of the guide groove 5. a cartridge which is characterized by being configured the circumference edge of the sliding guide projections 6 in the curved portion _61.

〔Example〕

An embodiment in which the present invention is applied to a video disk cartridge will be described. A circular magnetic disk (recording medium) 1, a case 2 composed of an upper case and a lower case for rotatably housing the disk 1, A shutter 4 that slides along the guide groove 5 while holding the upper and lower surfaces of the case to open and close the recording / reproducing head insertion window portion 3 formed in the case 2 is provided, and a retaining piece 7 that is inserted into the guide groove 5 is also provided. a slide guide protrusion 6 projecting from the inner side of the shutter 4 and, sliding guide projections 6, the guide groove 5 continuously in the shutter wall peripherally thereof by a curved surface portion ₆₁ with no corners The disk cartridge is bulged into a rectangular shape having long sides in the longitudinal direction.

As the sliding guide projections 6 each other bulges formed in a rectangular shape having a longitudinal direction in a long side of the guide groove 5 in the press in a hollow protrusion having a certain recess 6 ₂ between the straight portion and an arc portion, group those end entire periphery continuously shutter wall and a cutout or breakage portion without protrusions on the peripheral surface of the recess 6 _2, the sliding guide protrusion 6
However, it is provided with R on the outer peripheral edge of the top surface thereof and is provided along with the retaining pieces 7 on both sides of the shutter, but one may be provided on one side.

Further, in the case 2, the center core 11 of the disk 1 is arranged in a circular opening 12 formed in the center thereof, and the rectangular head insertion window portion 3, the pin insertion hole 13 and the shutter 4 can slide. The head insertion window 3 is covered by the shutter 4 when not in use, and when the disc cartridge is inserted, the lock is released and the head insertion window 3 is opened. It is equipped with slides.

The shutter 4 has a U-shaped cross section and is formed by pressing a thin metal plate that holds the case between the upper and lower plate surface portions. To be done. In this case, the retaining piece 7 is bent and projected at a height that does not come into contact with the bottom of the guide groove 5, and projections 6 are provided on both sides thereof, and the projection 6 has a width substantially equal to the groove width of the guide groove 5. Both ends are formed into circular curved surfaces so that they do not come into contact with the inner bottom surface of the guide groove 5 when sliding, and also slide when they come into contact.

Reference numeral 8 in the drawing denotes a shutter lock claw that prevents the shutter 4 from moving due to a shock or the like when the shutter 4 is locked when the shutter 4 covers the head insertion window portion 3 and is unlocked by pushing the shutter lock claw inward. 9 is a hole, 10
Is a tongue for locking.

[Effect of device]

According to the present invention, the sliding guide projection is bulged into a rectangular shape having a curved surface with no corners, the entire base end being continuous with the shutter wall, and a long side in the longitudinal direction of the guide groove. Due to
The sliding guide of the shutter is performed at the rounded corners and straight parts and at the fractured part or the protrusion without a notch hole, and it is possible to generate dust without scraping the inner surface of the case guide groove. It surely prevents it, guarantees a smooth sliding operation, and greatly improves the reliability of the cartridge, and even if the shutter tilts in the sliding direction, the cut-and-raised part of the retaining piece does not get caught in the guide groove. This guide can be used to prevent dust generation, and is safe to use without the risk of adversely affecting the disk or the appearance of the case.

[Brief description of drawings]

FIG. 1 is a perspective view of an embodiment of the present invention in a separated state, FIG. 2 is a plan view, FIGS. 3A and 3B are side and plan views of a shutter, and FIG. 4 is a line II of FIG. 3B. FIG. 5 is an enlarged vertical sectional view showing a conventional example of the portion. DESCRIPTION OF SYMBOLS 1 ... Disk (recording medium), 2 ... Case, 3 ... Head insertion window, 4 ... Shutter, 5 ... Guide groove, 6 ... Sliding guide projection, 6 ₁ ... Curved surface, 6 ₂ ... Recess, 7 ... Retaining One piece.

Continuation of the front page (56) Reference JP-A-59-72687 (JP, A) Actually opened 61-132572 (JP, U) Actually opened 61-174077 (JP, U) Actually opened 61-170176 (JP , U)

Claims (1)

[Scope of utility model registration request] 1. A case 2 for accommodating a recording medium 1 so as to record or reproduce information, and a recording / recording formed on the case 2.
A shutter 4 that slides along the guide groove 5 while holding the upper and lower surfaces of the case 2 to open and close the playback head insertion window 3.
And a slide guide protrusion 6 inserted into the guide groove 5 and a retaining piece 7 protruding from the inside of the shutter 4, the slide guide protrusion 6 is provided on both sides of the shutter 4. The slide guide projections 6 are provided on the side, and the entire circumferences of the base ends of the slide guide projections 6 are continuous with the shutter wall so as to bulge into a rectangular shape having long sides in the longitudinal direction of the guide grooves 5. cartridge, characterized in that to constitute a circumference edge of the 6 curved portion _61.