JPH1139824A - Disc cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disc cartridge for an information recording medium which has a shutter opening/closing mechanism of a smaller and thinner magnetic recording medium driver. SOLUTION: A pressing means is arranged to press a shutter 2 to one side part of a cartridge body 1 when the shutter 2 mounted to close or open a bored part 6 for a head access is at a closing position and a guide means 3 to guide the shutter 2 to the opened position from the closed position. In this case, the guide means have a function to open or close the shutter 2. One of the guide means 3 is directly retained on the shutter 2 while the other thereof is exposed from a hard cartridge and the exposed part is inserted and engaged with a protrusion provided of an information recording medium driver to open or close the shutter 2. A protrusion is formed near almost the center part of a guide part to retain almost the center part of the pressing means. One end of the pressing means is retained near the retained location of the guide part on the shutter 2 and the other end thereof is retained on the hard cartridge.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge for storing a disk-shaped information recording medium.

[0002]

2. Description of the Related Art In a floppy disk, an optical disk or the like, a disk-shaped information recording medium for magnetic recording and optical recording is housed in a hard disk cartridge to protect the surface of the medium. Such a disk cartridge is provided with an opening for head access when recording or reading information on or from an information recording medium stored therein.

The opening is opened and closed by a shutter in order to prevent dust from entering the disk cartridge. The shutter is slidably mounted on a cartridge body constituting a disc cartridge so as to open an opening when recording or reading information on or from an information recording medium. The shutter closes the opening when the floppy disk or optical disk is not used, and slides in conjunction with the mechanism of the drive device to slide the opening when the floppy disk or optical disk is inserted into the drive during use. It is designed to be open. FIG. 5 shows an opening / closing mechanism of a shutter 52 in a conventional disk cartridge 51 of this type. The shutter 52 is fitted into a claw-like member (not shown) provided on the shutter 52, whereby the surface of the cartridge body 53 is It is attached so that it can move linearly along.

A torsion spring 54 is disposed inside the cartridge body 53, one end of which is locked by a locking portion 55 provided at a corner of the cartridge body, and the other end is formed at one end of the shutter 52. The locking portion 56 is locked so that an urging force for constantly moving the shutter 52 in the closing direction is applied to the shutter 52.

[0005] In FIG. 5, the shutter 52 is opened by hooking the upper right of the shutter 52 with a claw shape from the information recording medium driving device side. In recent years, as the size of disk-shaped recording media and information recording medium drive devices has been reduced, this method may cause problems in the reliability of operation and the like. For reasons such as difficulty, a mechanism for opening and closing the shutter without any problem even if the size is reduced has been studied. For example, JP-A-8-30
According to Japanese Patent No. 6150, the shutter opening / closing mechanism is such that when a disc cartridge is inserted, an operation section provided as one end of a cam moves on the side face of the disc cartridge along the side face of the cartridge. It has been proposed to move the slider engaged with the other end of the cam and open the shutter engaged with the slider.

[0006]

However, the small size,
Demands for thinner and lighter weight are increasing, and such a shutter opening / closing mechanism is no longer sufficient.

[0007]

That is, an object of the present invention is to develop a disk cartridge suitable for miniaturization and thinning, and an object of the present invention is to provide a space for storing a disc-shaped information recording medium therein. A hard cartridge body formed, an opening for head access when recording or reading information on or from an information recording medium stored in the cartridge body, and the cartridge body for closing or opening the opening. A shutter movably mounted with respect to the shutter, when the shutter is in the closed position, pressing means for pressing the shutter against the-side of the cartridge body, and for guiding the shutter from the closed position to the open position. In a disk cartridge having guide means, one of the guide means is directly locked to the shutter, The other end is exposed from the rigid cartridge, and a projection for locking the substantially central portion of the pressing means is formed near the substantially central portion of the guide means. One end of the means is near a locking portion between the guide means and the shutter, and the other end is locked to the hard cartridge, respectively. This is easily achieved by a disk cartridge in which a concave portion or a hole for directly locking the guide means is formed on a surface that closes and sandwiches the open portion of the cartridge of the shutter.

Hereinafter, the present invention will be described in more detail. The present invention provides a hard cartridge body having a space for storing a disc-shaped information recording medium therein, and an opening for head access when recording or reading information on or from an information recording medium stored in the cartridge body. A hole, a shutter movably attached to the cartridge body to close or open the opening, and when the shutter is in the closed position, pushes the shutter toward the side of the cartridge body. The present invention relates to a disc cartridge having a contact means and a guide means for guiding the shutter from the closed position to the open position, and various known ones can be used without particular limitation.

The characteristics of the disk cartridge of the present invention are as follows.
One of the guide means is directly locked to the shutter without a slider or the like, and the other end is exposed from the hard cartridge. A projection provided on the information recording medium driving device at this exposed portion engages with the insertion of the cartridge into the driving device, and functions to open and close the shutter. Further, a projection for locking the substantially central portion of the pressing means is formed near the substantially central portion of the guide portion, and one end of the pressing means is engaged with the shutter of the guide portion. In the vicinity, the other ends are respectively locked to the rigid cartridges. More preferred embodiments include simplified assembly,
From the viewpoint of reducing the number of parts, in order to directly lock the guide means on the shutter, a concave portion or a hole is formed on a surface that closes and sandwiches the open portion of the cartridge of the shutter, and the guide portion is formed using the concave portion or the hole. The shutter should be locked.

[0010] More preferably, a projection for locking the substantially central portion of the pressing means is formed by at least two or more projections near a substantially central portion of the guide means. More preferably, one of the projections has an arch shape (a wall-like structure having a curved surface, not a columnar shape as shown in FIG. 3). As a result, the possibility that the pressing means comes off the guiding means can be reduced. It is preferable that the arch-shaped projection is provided on the outside where the pressing means is bent when the shutter is opened.

If an opening for inserting the pressing means is formed on at least one side surface of the cartridge, the pressing means can be easily inserted from the outside of the cartridge at the final stage of the assembly process. is there. Further, if the pressing means is a bending spring, insertion from the outside of the cartridge can be further simplified, and the advantages are increased.

The disk cartridge of the present invention is particularly excellent for accommodating a small-sized information recording medium, and is generally suitable for an information recording medium of 5.25 inches or less, preferably 3.5 inches or less, particularly preferably 3 inches or less. I have. This is because the guide portion and the shutter are directly locked without the intervention of the slider, and if the movement amount of the shutter when opening and closing the shutter is too large, a problem may occur in the reliability of the operation.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The magnetic disk cartridge of the present invention will be described in detail below, but the present invention is not limited to the embodiments unless it exceeds the gist.

(Embodiment 1) FIGS. 1, 2, 3 and 4 show an example of a disk cartridge of this embodiment. A hard cartridge body 1 in which a space for storing a disc-shaped information recording medium is formed, and a head access for recording or reading information on or from an information recording medium (not shown) stored in the cartridge body 1 Opening 6 for opening and closing the cartridge body 1 so as to close or open the opening.
And a shutter 2 movably mounted with respect to the shutter 2 when the shutter 2 is in the closed position.
Means 4 for pressing the cartridge against the side of the cartridge body 1.
And a guide cartridge 3 for guiding the shutter 2 from the closed position to the open position. One of the guide means 3 has an arm-shaped projection 3-1 extending in the thickness direction of the cartridge, and is engaged with and engaged with a recess 2-1 formed in the shutter 2. The other end 3-5 is exposed to the outside of the cartridge as 3-5 and engages with the projection of the information recording medium drive. Also,
The end 4-1 of the pressing means is connected to the pressing means end locking portion (A) 3-2 of the guiding means 3 and the other end 4-3 is
The center part 4-2 is provided at the pressing means end locking part (c) 5.
It is locked and held in a space between the projections 3-3 and 3-4 formed in the center of the guide means and between the cartridges. At the upper part of the cartridge body, a pressing means insertion portion 7 indicated by oblique lines in FIG. 4 is formed.

(Example 2) The configuration was the same as that of Example 1 except that the guide locking portion (S) 2-1 formed on the shutter 2 was formed in a hole shape. (Example 3) Except that the projection formed in the central part of the guide means was arch-shaped, the configuration was the same as that of Example 1.

[0016]

According to the present invention, it is possible to provide a disk cartridge which is easy to manufacture and suitable for miniaturization.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of the structure of a disk cartridge according to the present invention.

FIG. 2 is an explanatory diagram showing an example of the structure of a disk cartridge according to the present invention.

FIG. 3 is an explanatory diagram showing an example of the structure of a disk cartridge according to the present invention.

FIG. 4 is an explanatory diagram showing an example of the structure of a disk cartridge according to the present invention.

FIG. 5 is an explanatory diagram showing an example of the structure of a conventional disk cartridge.

[Explanation of symbols]

 1: Cartridge main body 2: Shutter 2-1: Guide means locking part (S) 3: Guide means 3-1: Shutter locking part 3-2: Pushing means end part locking part (A) 3-3: Pushing means central locking part 1 3-4: Pushing means central locking part 2 3-5: Guide means exposed part 4: Pushing means 4-1: End locking part 1 4-2: Center Part locking part 4-3: End locking part 25: Pressing means end locking part (C) 6: Opening part 7: Pressing means insertion hole 51: Disk cartridge 52: Shutter 53: Cartridge Main body 54: Torsion spring 55: Locking portion 56: Locking portion

Claims (5)

[Claims] 1. A hard cartridge body in which a space for storing a disc-shaped information recording medium is formed, and a head access for recording or reading information on or from an information recording medium stored in the cartridge body. An aperture, a shutter movably attached to the cartridge body to close or open the aperture, and when the shutter is in the closed position, pushes the shutter against a portion of the cartridge body. In a disc cartridge having a pressing means to be applied and a guide means for guiding the shutter from a closed position to an open position, one of the guide means is directly locked to the shutter, and the other end is provided with the hard end. And near the approximate center of the guide means, near the approximate center of the pressing means. A locking projection is formed, and one end of the pressing means is locked near the locking portion between the guide means and the shutter, and the other end is locked to the rigid cartridge. A disk cartridge characterized by the above-mentioned. 2. The disk cartridge according to claim 1, wherein a concave portion or a hole for directly locking said guide means is formed on a surface of said shutter that closes an open portion of said cartridge and sandwiches said open portion. 3. The projection according to claim 1, wherein the projection formed near the center of the guide unit and locking the substantially center of the pressing unit is formed by at least two projections. Disk cartridge. 4. A projection according to claim 1, wherein at least one of the projections formed near the center of the guide means and locking the center of the pressing means is formed as an arch-shaped projection. The disk cartridge according to any one of the above. 5. The disk cartridge according to claim 1, wherein said pressing means is a bending spring.