JPH0664878B2 - Disco Cartridge - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge which is a magnetic recording medium.

Structure of Conventional Example and Its Problems In recent years, the entry of floppy disks into the magnetic recording field has been remarkable, and recently, in particular, a type in which a floppy disk is stored and protected in a hard case has become widely used to make it easier to use. .

Hereinafter, the conventional disc cartridge as described above will be described with reference to the drawings.

1A and 1B are external views of a conventional disc cartridge. A cartridge 1 stores a recording medium 2 in a rotatable state, and the cartridge 1 is made of synthetic resin. The recording medium 2 is recorded and reproduced through the head window 3. The head window 3 enables the recording / reproducing on the recording medium 2 by opening / closing the metallic shutter plate 4 or protects the recording medium 2 when it is not used for the recording / reproducing. The shutter plate 4 is connected to one end of a slider 5, and a protrusion 6 is provided at the other end of the slider 5, and the shutter plate 4 is rotated by the movement of the protrusion 6 in the direction of arrow 7. The head window 3 is opened.
The slider 5 is made of synthetic resin. Reference numeral 8 denotes a U-shaped groove located on both side surfaces of the cartridge 1, into which the convex portion 6 of the slider 5 is fitted. FIG. 1b shows an enlarged view of the U-shaped groove portion 8. The protrusion 6 of the slider 5 is shown in FIG.
The load in the direction of the arrow 7 is applied to the shutter plate 4, the shutter plate 4 rotates, the head window 3 opens, and recording and reproduction on the recording medium 2 are possible. FIG. 3 shows the positional relationship between the recording / reproducing device 9 and the cartridge 1. Cartridge 1
Is inserted by inserting the head window 3 side into the recording / reproducing device 9 first and pushing the other end. 4A and 4B are a plan view and a side view of the positional relationship between the cartridge 1 and the recording / reproducing apparatus 9, respectively. The hatched portion 10 is a protrusion on the recording / reproducing apparatus side that engages with the protrusion 6 of the slider 5. When the cartridge 1 is inserted into the recording / reproducing apparatus 9, the protrusion 10 and the convex portion 6 of the slider 5 are engaged with each other, and by further inserting the cartridge 1, the convex portion 6 slides in the U-shaped groove 8, and The shutter plate 4 is rotated via the slider 5 by the sliding of the portion 6, and the head window 3 is opened in the recording / reproducing apparatus 9, and the recording medium 2 is exposed at the head window 3. This is shown in FIGS. 5a and 5b.

Now, when inserting the cartridge 1 into the recording / reproducing apparatus 9,
The cartridge 1 and the recording / reproducing device 9 rarely become completely parallel to each other, and in many cases, the protrusion 10 in the recording / reproducing device 9 collides with the insertion end surface of the U-shaped groove portion 8 of the cartridge 1 into the recording / reproducing device 9. However, there is a drawback that the insertion end surface of the cartridge 1 is damaged. This is shown in FIG.

SUMMARY OF THE INVENTION In view of the above drawbacks, the present invention provides a disk cartridge having a structure that improves the insertability when inserted into a recording / reproducing apparatus and significantly reduces damage to the cartridge.

In order to achieve this object, a disk cartridge of the present invention is a disk cartridge containing a disk-shaped recording medium, and has a U-shaped cross section that engages with a protrusion inside the apparatus when inserted into a recording / reproducing apparatus. Grooves are provided on both side surfaces parallel to the insertion direction into the recording / reproducing apparatus, and on the insertion end surface side of the U-shaped groove, both side surfaces and the bottom surface of the groove portion are chamfered to obtain a chamfered portion having a U-shaped cross section. Is provided. With this configuration, when the disc cartridge is inserted into the recording / reproducing apparatus, damage to the cartridge can be eliminated.

Description of Embodiments An embodiment of the present invention will be described below with reference to the drawings. FIG. 7 shows an external view of a disk cartridge according to an embodiment of the present invention. In FIG. 7, reference numeral 11 is a cartridge, which accommodates the recording medium 12 in a rotatable state. The recording medium 12 is recorded and reproduced through the head window 13. The head window 13 is a shutter plate made of metal
The opening and closing of 14 enables recording and reproduction, and protects the recording medium 12 when not in use. The shutter plate 14 is connected to one end of a belt-shaped slider 15 made of synthetic resin.
At the other end of 15, a convex portion 16 fitted in a groove on the side surface of the cartridge 11 described later is coupled, and the movement of the convex portion 16 in the direction of arrow 17 causes the shutter plate 14 to rotate and the head window 13 to be opened and closed. Become. Reference numeral 18 denotes a U-shaped groove located on both side surfaces of the cartridge 11. Partial views of the U-shaped groove portion 18 are shown in FIGS. As shown in FIG. 8a, a chamfered chamfer 20 is formed on the bottom of the end of the groove 18 inserted into the recording / reproducing apparatus. Next, as shown in FIG. 8B, linear chamfers 21 are formed on both side surfaces of the groove portion 18 on the insertion end surface side. Fig. 8c
FIG. 8 is an external perspective view of FIGS. FIG. 9 shows the relationship between the insertion end surface of the cartridge 11 and the projection 19 of the recording medium storage space on the inner surface of the recording / reproducing apparatus (not shown). By inserting the cartridge 11 into the recording / reproducing apparatus, the protrusion 19 in the recording / reproducing apparatus is guided into the U-shaped groove portion 18 of the cartridge 11, but the chamfered edges 20 and 2 are formed on the end faces of the U-shaped groove portion 18.
Because there is 1, the projection 19 is chamfered on the chamfered 20 and 21 parts
It is smoothly introduced along the 20th and 21st copies.

As described above, according to the present embodiment, the insertion of the cartridge into the recording / reproducing apparatus is achieved by chamfering 20, 21 on the insertion end surface side of the groove portion 8 having a U-shaped cross section on both sides of the disk cartridge. Therefore, the damage to the cartridge can be significantly reduced.

Effects of the Invention As described above, the present invention has a disc-shaped recording medium built-in, and has groove portions having a U-shaped cross section on both side surfaces parallel to the insertion direction when the disc-shaped recording medium is inserted into a recording / reproducing apparatus. By chamfering the insertion end surface into the recording / reproducing device inside the U-shaped groove, the insertability of the disk cartridge is improved and the disk cartridge can be inserted smoothly, and damage to the outer surface of the disk cartridge is reduced. It is possible and its practical effect is great.

[Brief description of drawings]

1a and 1b are schematic views of a conventional disc cartridge, FIG. 2 is a schematic view showing the head window open state of FIG. 1,
FIG. 3 is a schematic external view showing the insertion position relationship between the recording / reproducing apparatus and the disk cartridge, FIGS. 4A and 4B are plan and side views of FIG. 3, and FIGS. 5A and 5B are recording and reproducing apparatus for the disk cartridge. FIG. 6 is a partial view showing a state in which a projection of a recording / reproducing apparatus is inserted into a U-shaped groove portion of a conventional disk cartridge when inserted into a conventional disk cartridge, and FIG. 7 shows an embodiment of the present invention. External views, FIGS. 8a, 8b, 8c are side views, front views, and perspective views of the U-shaped groove, respectively, and FIG. 9 is a portion showing the protrusion of the recording / reproducing device in the U-shaped groove of the disk cartridge. It is a figure. 1 ... Disk cartridge, 2 ... Recording medium, 3 ...
Head window, 4 ... Shutter plate, 5 ... Slider, 6 ... Slider tip protrusion, 7 ... Arrow, 8 ...
U-shaped groove, 9 ... Recording / reproducing device, 10 ... Protrusion, 11 ...
Disk cartridge, 12 …… Recording medium, 13 …… Head window, 14 …… Shutter plate, 15 …… Slider,
16 …… Slider tip protrusion, 17 …… Arrow, 18 …… U-shaped groove, 19 …… Protrusion, 20,21 …… Chamfer.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Ishii 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-57-212669 (JP, A) JP-A-58-130475 (JP, A)

Claims (1)

[Claims] 1. A disc cartridge containing a disc-shaped recording medium, wherein when inserted into a recording / reproducing device, a groove having a U-shaped cross section that engages with a protrusion in the device is inserted in the recording / reproducing device. And a chamfered portion having a U-shaped cross section by chamfering both side surfaces and the bottom surface of the groove portion on the insertion end surface side of the U-shaped groove.