JP2500839Y2 - Structure of mounting part of shutter in disk cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a structure of a mounting portion of a shutter in a disk cartridge for accommodating an optical disk or a magnetic disk.

[Conventional technology]

Generally, a magnetic disk or optical disk is housed in a cartridge.

The cartridge includes a shell for accommodating the disc in which an upper shell portion and a lower shell portion are overlapped with each other, and at a predetermined position of the shell, a spindle insertion hole into which a spindle of a reading / writing device is inserted, and A head insertion hole into which the read / write head is inserted is provided.

A guide rail is provided at the front end of the shell, and a slider is configured to reciprocate along the guide rail. A shutter for opening and closing the head insertion hole and the spindle insertion hole is fixed to the slider. ing.

The slider has a substantially rectangular prism shape, and the top plate portion of the slider is fixed to the top surface of the slider.

The shutter includes side plate portions that project in parallel from both sides of the top plate portion, and the head insertion holes and the like are opened and closed by these side plate portions.

A torsion coil spring is provided between the head of the slider and the shell, and the shutter is always biased in the direction of closing the hole.

Further, an engaging hole used when opening and closing the shutter is formed at a connecting portion between the slider and the shutter.

That is, the read / write device is provided with two opening / closing pins, and when the disc cartridge is loaded to treat the disc surface, the opening / closing pin for the surface enters into the recess and resists the torsion coil spring. Move to open the shutter. Further, when the disk cartridge is loaded in the direction of the back surface processing, the opening / closing pin for the back surface moves into the concave portion to open the shutter.

Further, when the shutter is opened, the other opening / closing pin is unnecessary, but a concave portion for letting out such a so-called discarding pin is formed in the front end portion of the shell.

Thus, when the surface of the disc is processed, the opening / closing pin for the surface fits in the recess and moves in one direction, and the shutter opens. The discard pin enters the recess. When the processing is completed, both the opening / closing pin and the discarding pin escape from the recess and return to the original position. Then, the shutter returns to its closed position by the restoring force of the torsion coil spring. on the other hand,
When the back surface of the disk is processed, the opening / closing pin for the back surface fits in the recess to open the shutter, and the discarding pin escapes to the recess on the shell side.

[Problems to be solved by the device]

However, as shown in FIG. 6, the conventional shutter 1 rides over the tail portion 3 of the slider 2 and projects rearward.

Therefore, when the shutter 2 is closed, the shutter 1 intervenes as a vertically raised barrier against the discarding pin 4 which is about to return to its original position, and the discarding pin 4 is caught by the edge 5 there and the original state is generated. May not return to.

When the discarding pin 4 does not move, the reading / writing device does not work and the disk cartridge cannot be taken out of the device.

[Means for solving the problem]

In order to solve the above problems, the present invention provides a disk cartridge in which a shutter for opening and closing a shell of a disk cartridge is reciprocally connected to a front end portion of the shell via a slider, and the slider has a ceiling of the shutter. A curved surface portion is formed at a position where the top surface to which the plate portion is fixed and the rear end surface are in contact with each other, and at a portion in contact with the curved surface portion of the shutter, from the top plate portion to both side plate portions for opening and closing the shell A notch is formed, and the curved surface portion of the slider is projected outward from the notch.

[Operation] When the discarding pin returns to the original position, the pin hits the curved surface portion protruding outward from the notch.

Therefore, the pin is smoothly returned to the original position without being caught by the edge of the shutter.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 4 and 5, the disc cartridge 6 has a shell 7 for accommodating a disc (not shown).

The shell 7 is formed by combining the upper shell portion 7a and the lower shell portion 7b, and a spindle (not shown) of a reading / writing device should be inserted in the center of each shell portion 7a, 7b. A spindle insertion hole 8 and a head insertion hole 9 into which a read / write head (not shown) is to be inserted are provided.

A shutter 10 is put on the shell 7 to open and close the spindle insertion hole 8 and the head insertion hole 9.

As shown in FIG. 3, the shutter 10 is made by, for example, symmetrically bending a stainless steel plate, and has a top plate portion 11 at the center.
And side plates 12a and 12b that hang down in parallel from both edges of the top plate 11. The side plate portions 12a, 12b
Covers the two holes 8 and 9, and sliding portions 13 and 13 are provided at the lower ends thereof, respectively.

A top plate portion 11 of the shutter 10 is fixed to a slider 14, and the shutter 10 is attached to the shell 7 via the slider 14. The sliding portions 13 and 13 are pressed against the end plate portion of the shell 7 by the pressing plates 15 and 15.

This allows the shutter 10 to move along the outer wall surface of the shell 7, and when the shutter 10 moves in one direction and stops, the hole 8,
When 9 is closed and moved to the other side and stopped, the holes 8 and 9 are opened.

The slider 14 has a substantially quadrangular prism shape, and guide grooves 16 and 16 are provided on the left and right side surfaces thereof. This guide groove 1
As shown in FIG. 2, 6, 16 are adapted to engage with guide rails 17, 17 formed at the front end of the shell 7 on the recording / reproducing device side.

The top surface 18 of the slider 14 is parallel to the peripheral wall surface of the shell, and the top plate portion 11 of the shutter 10 is fixed thereto by screw screws 19 and 19. It should be noted that the portion where the top surface 18 contacts the top plate portion 11 is slightly depressed because it receives the top plate portion 11, and therefore steps 18a and 18a are formed.

The head of the slider 14 projects from the end of the top plate portion 11 of the shutter 10 for a long time, and an inclined surface 20 that descends from the top surface 18 to the shell peripheral wall surface is formed in this protruding portion.

A curved surface portion 22 is formed on the tail portion of the slider 14 at a position where the top surface 18 and the rear end surface 21 of the slider 14 are in contact with each other. On the other hand, at the location where it contacts the front curved surface portion 22 of the shutter 10,
A notch 23 in a shape cut by an inclined surface is formed from the top plate portion 11 to both side plate portions 12a and 12b, and the curved surface portion 22 of the slider 14 projects outward from the notch 23.

Further, the shutter 10 and the slider 14 are provided with an opening 24a and a recess 24b, respectively, at locations corresponding to the front end of the disk cartridge 6. These openings 24a
The recess 24b and the recess 24b are aligned with each other to form an engagement hole 24 to be engaged with the opening / closing pin 25a or 25b provided on the drive unit side of the recording / reproducing apparatus.

Further, so-called discarding pins 25a or 25b are provided at all the end portions of the shell 7 and exposed when the shutter 10 is opened.
A groove 26 is formed in which is inserted.

Between the head of the slider 14 and the inner wall of the shell 7,
As shown in FIG. 4, a torsion coil spring 27 is stored. The shutter 10 is constantly urged by the torsion coil spring 27 through the slider 14 in the direction of closing both the holes 8 and 9.

The reference numerals 27a and 27b provided in the vicinity of the pressing plate 15 attached to the shell 7 are double writing prevention devices for the front surface and the back surface of the disk, respectively.

Next, the operation when the disc cartridge 6 is inserted into the recording / reproducing apparatus will be described.

The two opening / closing pins 25a and 25b in the recording / reproducing apparatus correspond to the front surface and the back surface of the disc, respectively, and when the disc cartridge 6 is loaded for the surface treatment, as shown in FIG. The opening / closing pin 25a of the above is engaged with the engaging hole 24 to move the shutter 10 in the opening direction A. On the other hand, the opening / closing pin 25b for the back side becomes a discarding pin and enters the groove 26.

After that, when the surface of the disk is finished and a predetermined operation is performed on the recording / reproducing apparatus, the opening / closing pin 25a for the surface is disengaged from the engaging hole 24, moved toward the arrow B, and returned to the original position. To do.

Further, in synchronization with this, the discarding pin 25b also separates from the groove 26, moves in the direction of arrow A, and returns to the original position. At this time, as shown in FIG. 1, the discarding pin 25b moves along the curved surface portion 22 of the tail portion of the slider 14 and smoothly returns to the original position.

When the disk cartridge 6 is loaded for back side processing, the back side opening / closing pin 25b engages with the engaging hole 24, and the front side opening / closing pin 25a becomes a discarding pin and enters the groove 26.

When the opening / closing pin 25a or 25b is disengaged from the engagement hole 24, the shutter 10 automatically returns to the closed state by the action of the torsion coil spring 27.

[Effect of device]

Since the present invention has the above configuration,
When the discarding pin returns to its original position, it can be guided by the curved portion of the slider tail.

Therefore, the pin can be smoothly returned to the original position, and the operation of the reading / writing device can be ensured.

[Brief description of drawings]

1 to 5 are explanatory views of an embodiment of the present invention. FIG. 1 is a partially cutaway side view showing a mounting portion of a shutter in a disk cartridge together with a discarding pin, and FIG. 2 is an opening operation of the shutter. FIG. 3 is a partially cutaway perspective view of the mounting portion of the shutter in FIG. 3, FIG. 3 is an exploded perspective view of the slider and the shutter,
4 is a perspective view of the disk cartridge when the shutter is closed, FIG. 5 is a perspective view of the disk cartridge when the shutter is open, and FIG. 6 is a partially cutaway side view showing the conventional example corresponding to FIG. 6 ... Disk cartridge, 7 ... Shell, 7a ... Upper shell part, 7b ... Lower shell part, 8 ... Spindle insertion hole, 9 ... Head insertion hole, 10 ... Shutter, 11 ... Top plate part , 12a, 12b ... Side plate, 14 ... Slider, 16 ... Guide groove, 17 ... Guide rail, 18 ... Top surface, 21 ... Rear end surface, 22 ... Curved surface section, 23 ... Notch, 24 ...... Engagement holes, 25a, 25
b …… Opening / closing pin, 26 …… Groove.

Claims (1)

(57) [Scope of utility model registration request] 1. A disk cartridge in which a shell opening / closing shutter of a disk cartridge is reciprocally connected to a front end portion of the shell via a slider, and a top plate portion of the shutter is fixed to the slider. A curved surface is formed at a position where the top surface and the rear end surface of the shutter contact each other, and a notch is formed at a position of the shutter that contacts the curved surface from the top plate to both side plates for opening and closing the shell, A structure of a shutter mounting portion in a disk cartridge, wherein a curved surface portion of the slider protrudes outward from a notch.