JPH0330162A - Disk cartridge - Google Patents

Abstract

PURPOSE:To improve the strength of a spring storing part weak in terms of the strength by providing a reinforcement rib on the enclosure wall of the spring storing part along the moving locus of the coil part of the spring attended with the opening/closing of a shutter. CONSTITUTION:The reinforcement rib 9 is provided along with the moving locus of a coil 8a of the spring 8 attended with the switching of a shutter 5. The shutter 5 is opened against the force of the spring 8 with a switching pin at a driving device side when a disk cartridge is in use and a head inserting opening 4 is opened. Moreover, in the case of the switching of the shutter 5, the switching of the shutter 5 is smoothed by the reinforcement rib 9 provided on an upper half piece and a lower half piece along the moving locus of the coil 8a of the spring 8. Through the constitution above, the strength of the part of a spring storing part weak especially in terms of the strength is reinforced and then the deformation or the damage of the disk cartridge is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk cartridge for accommodating an optical disk or a magnetic disk.

[Conventional technology]

In general, a disk cartridge includes a cartridge body in which an upper half piece 1 and a lower half piece 2, which are molded synthetic resin parts, are joined facing each other, as shown in FIG. Also,
A spindle opening 3 for disk rotation is formed in the center of this lower half piece 2.

Adjacent to this spindle opening 3 is a head insertion opening 4 for reading and writing. On the other hand, the upper piece 1 is also provided with a head insertion opening 4 at a location facing the head insertion opening 4 of the lower half piece 2. Further, a shutter 5 for opening and closing the spindle opening 3 and the head insertion opening 4 is slidably provided on the cartridge body. Further, each of the upper half piece 1 and the lower half piece 2 is provided with a shallow recess 6 at a portion where they come into sliding contact with the shutter 5, and this recess 6 prevents an increase in the thickness of the cartridge due to the provision of the shutter 5. It has the function of guiding the shutter 5 and the function of guiding the shutter 5. Further, a spring housing portion 7 is formed in one corner of the cartridge body. and,
As shown in FIG. 8, the spring housing portion 7 houses a spring 8 that biases the shutter 5 in the direction of closing the spindle opening 3 and the head insertion opening 4. As shown in FIG. Here, this spring 8 is inserted into the spring storage part 7 from the spring insertion opening 7a opened in the spring storage part 7.
Insert and install it inside.

[Problem to be solved by the invention]

However, the cartridge configured as described above is simply made by joining two upper and lower halves molded from synthetic resin, and therefore has low mechanical strength. Further, since the spring insertion port remains open even after the spring is installed, the strength of this spring insertion port is particularly low, and there is a problem that it may be deformed or damaged during use.

SUMMARY OF THE INVENTION An object of the present invention is to provide a disk cartridge that solves the above-mentioned problems and strengthens the strength of the spring accommodating portion, which is particularly weak.

[Means to solve the problem]

The present invention includes a plate-shaped cartridge housing, a shutter slidably attached to the cartridge housing for opening and closing a head insertion opening formed in the cartridge housing, and a shutter that is moved in a direction to close the head insertion opening. In the disk cartridge having a spring that biases the spring, a reinforcing rib is formed on the housing wall of the spring storage part that houses the spring, and the reinforcing rib is formed in the movement locus of the coil portion of the spring as the shutter is opened and closed. It was designed to be installed along the line.

[Effect]

When the disk cartridge is not in use, the shutter is biased by a spring and closes the spindle opening and the head insertion opening. Further, when the disk cartridge is used, the shutter is opened by the opening/closing pin on the drive device side against the force of the spring, and the head insertion opening is opened.

Furthermore, when the shutter 5 opens and closes, the reinforcing ribs provided on the upper and lower halves allow the shutter 5 to smoothly open and close along the locus of movement of the coil portion of the spring, causing deformation of the disk cartridge. etc. can be prevented.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a diagram showing a disk cartridge according to the present invention. This cartridge body consists of an upper half piece 1 and a lower half piece 2, which are molded from synthetic resin, and are joined to face each other. Further, a spindle opening 3 for rotating the disk is formed in the center of the lower half piece 2. A head insertion opening 4 for reading and writing is provided adjacent to the spindle opening 3. On the other hand, the upper half piece 1 is also provided with a head insertion opening 4 at a location facing the head insertion opening 4 of the lower half piece 2. Further, a shutter 5 for opening and closing the spindle opening 3 and the head insertion opening 4 is slidably provided on the cartridge body.

Further, each of the upper half piece 1 and the lower half piece 2 is provided with a shallow recess 6 at a portion where they come into sliding contact with the shutter 5, and this recess 6 prevents an increase in the thickness of the cartridge due to the provision of the shutter 5. It has the function of guiding the shutter 5 and the function of guiding the shutter 5. Further, a spring housing portion 7 is formed in one corner of the cartridge body. The spring housing portion 7 houses a spring 8 that biases the shutter 5 in the direction of closing the spindle opening 3 and the head insertion opening 4.

Here, the spring 8 is inserted and installed into the spring housing part 7 through a spring insertion opening 7a opened in the spring housing part 7. Here, in the upper half piece 1 and the lower half piece 2, as shown in FIGS. 2 to 4, a spring storage portion 7 is provided.
Reinforcing ribs 9a and 9b are formed along the locus of movement of the coil portion 8a of the spring 8 as the shutter 5 opens and closes, respectively. FIG. 5 is a partial view taken along arrows -■ in FIG. That is, the coil portion 8a of the spring 8 is housed between the reinforcing rib 9a of the upper half piece 1 and the reinforcing rib 9b of the lower half piece 2.

When the disc cartridge configured in this manner is not in use, the shutter 5 is biased by a spring 8 to close the spindle opening 3 and the head insertion opening 4, as shown in FIG. In addition, when using a disk cartridge, an opening/closing pin (not shown) on the drive unit allows
The shutter 5 is opened against the force of the spring 8, and the head insertion opening 4 is opened.

Furthermore, since reinforcing ribs 9 are provided on the upper half piece 1 and the lower half piece 2 along the locus of the coil portion 8a of the moving spring 8 during the opening/closing operation of the shutter 5, There is no deformation of the disk cartridge, the shutter 5 is prevented from coming off from the cartridge, and the shutter 5 can be opened and closed smoothly.

FIG. 6 shows another embodiment of the present invention. In this case, reinforcing ribs 9 are provided only on the upper half piece 1 on the locus of movement of the coil portion 8a of the spring 8 as the shutter 5 opens and closes.

Note that the reinforcing ribs 9 having the shape described above may be provided only on the lower half piece 2.

〔Effect of the invention〕

By configuring the present invention as described above, it is possible to strengthen the strength of the spring storage portion, which is particularly weak, and it is also possible to prevent deformation and damage of the disk cartridge. .

[Brief explanation of drawings]

FIG. 1 is a perspective view of a disk cartridge according to the present invention, FIG. 2 is a perspective view of a spring insertion port according to the present invention, FIG. 3 is a perspective view of an upper half piece of the present invention, and FIG. 4 is a perspective view of a lower half piece of the present invention. A perspective view; FIG. 5 is a partial side view taken from the ■-■ arrow in FIG. 1;
FIG. 6 is a side view of another embodiment of the present invention, FIG. 7 is a front view of a conventional disk cartridge, and FIG. 8 is a perspective view of a conventional spring insertion port. ■... Upper half piece, 2... Lower half piece, 4... Head insertion opening, 5... Shutter, 7... Spring storage part,
8...Spring, 8a...Coil part, 9...Reinforcement rib.

Claims (1)

[Claims] A plate-shaped cartridge housing, a shutter slidably attached to the cartridge housing for opening and closing a head insertion opening formed in the cartridge housing, and urging the shutter in a direction to close the head insertion opening. In the disk cartridge having a spring, a reinforcing rib is formed on a housing wall of a spring housing portion that houses the spring, and the reinforcing rib is provided along a locus of movement of the coil portion of the spring as the shutter is opened and closed. A disc cartridge characterized by: