JPH0424534Y2 - - Google Patents

Description

[Detailed explanation of the invention] [Industrial application field] The invention is a writable disk.
The present invention relates to a disk cartridge that is optimal for use with disks capable of both recording (writing) and reproducing (reading) such as optical disks and magneto-optical disks called "discs".

[Summary of the idea]

In this invention, a disk, which is a recording medium, is housed in a cartridge consisting of upper and lower halves, and a pair of upper and lower recording and reproducing head insertion holes provided in the upper and lower halves are formed by bending a metal plate into a substantially U-shaped cross section. The vertical plate portion connecting one end of the pair of upper and lower horizontal plate portions of the shutter is slid along a guide shaft horizontally installed between the upper and lower halves. In a disk cartridge which is screwed to the side surface of the sliding member with a plurality of screws, the vertical plate portion of the shutter is screwed to the side surface of the sliding member without pressure. The opening and closing operations can be performed smoothly with a small amount of force.

[Conventional technology]

Example of an earlier application filed by the applicant of the present invention (Utility Application 1983-
138278) will be explained with reference to FIGS. 4 and 5.

In this prior application, a writable disk 1 such as an optical disk or a magneto-optical disk as a recording medium is rotatably housed in a cartridge 4 consisting of upper and lower halves 2 and 3 made of synthetic resin. , 3 are screwed together with a plurality of screws 5 at the periphery. A circular turntable insertion hole 6 is provided in the center of the upper and lower halves 2 and 3, and a rectangular head insertion hole for recording and playback is provided from the center to the outer periphery on one side of these holes. A pair of upper and lower optical head insertion holes 7 are configured to be opened and closed by shutters 8 having a substantially U-shaped cross section.

The shutter 8 is formed by bending a metal plate such as a stainless steel plate into a substantially U-shaped cross section, and has a pair of upper and lower rectangular horizontal plate parts 9.
and a vertical plate part 1 that vertically connects one end of these parts.
0. Both horizontal parts 9 of this shutter 8 are the upper and lower outer surfaces 2 of the upper and lower halves 2 and 3.
A pair of upper and lower horizontal recesses 11 provided in a and 3a
The vertical plate 10 is arranged in a vertical recess 1 provided in one end surface 2b, 3b of the upper and lower halves 2, 3.
It is located within 2. Note that both optical head insertion holes 7 are provided in both recesses 11. A sliding member 14 such as a rack made of synthetic resin or the like is slidably attached to a guide shaft 13 horizontally installed along the inside of the recess 12 between the upper and lower halves 2 and 3. The vertical plate portion 10 of the shutter 8 is fixed to the side surface 14a of the sliding member 14 with two screws 15 for self-tapping. Furthermore, the free ends 9a of both horizontal plate portions 9 of the shutter 8 are bent inward and lower. is inserted between the guide groove 16 and a pair of upper and lower guide plates 17 fixed to the upper and lower halves 2 and 3 by adhesive or the like. and a shutter opening/closing mechanism in the cartridge 4 (not shown)
By sliding the sliding member 14 along the guide shaft 13, the shutter 8 is moved between the open lid position shown by the solid line in FIG. 4 and the closed lid position shown by the dashed line in FIG. The horizontal plate portions 9 are configured to open and close both optical head insertion holes 7 by reciprocating in the direction of arrow a.

[Problem that the invention attempts to solve]

By the way, in the example of the prior application, the vertical plate part 10 of the shutter 8 is screwed in such a way that it is strongly tightened (pressurized) to the side surface 14a of the sliding member 14 using the screw heads 15a of the two screws 15. When the shutter 8 was stopped, the shutter 8 was forcibly distorted and easily attached to the upper and lower halves 2 and 3. In addition, the processing accuracy of the shutter 8, which is bent from a stainless steel plate, and the mounting accuracy of the sliding member 14 are not sufficient, whereas the shutter 8 is fixed to the sliding member 14 in an immovable state. The shutter 8 was easily attached to the upper and lower halves 2 and 3 in a distorted state.

As a result, as shown in FIG. 5, the shutter 8 is likely to be mounted in a state in which the horizontal plate portion 9 presses the recess 11, the guide groove 16, or the guide plate 17 more strongly than necessary. If the shutter 8 is slid in the direction of arrow a in FIG. 4 in this state, the recesses 11, guide grooves 16, or guide plates 17 in the upper and lower halves 2 and 3 may be scratched prematurely. Not only that, but the sliding resistance of the shutter 8 is so large that the shutter 8 cannot be opened and closed smoothly with a small force.

The present invention allows the shutter to be slidably mounted parallel to the upper and lower halves so that the shutter is not forcibly distorted when mounted to the upper and lower halves.

[Means for solving problems]

The present invention includes a cartridge formed with an opening that exposes a part of the disk to the outside and shaped to rotatably accommodate the disk, a horizontal plate portion that opens and closes the opening, and a horizontal plate portion that opens and closes the opening. a shutter having a substantially U-shaped cross section and a vertical plate part connected to the shutter part; The vertical plate portion of the shutter is provided with a sliding member fixed by a plurality of screws to a portion exposed from one side of the cartridge, and the vertical plate portion of the shutter is provided with a plurality of screw insertion holes. A plurality of spacers having a thickness greater than the thickness of the vertical plate portion of the shutter are inserted into the plurality of holes, and the plurality of screws are inserted through the plurality of spacers from the outside of the vertical plate portion of the shutter. The screw heads of the plurality of screws are screwed into the sliding member, and the screw heads of the plurality of screws are tightened to the end faces of the plurality of spacers, and the vertical plate portion of the shutter is free of play between the screw heads of the plurality of screws and the sliding member. It is caught in a certain state.

[Effect]

In the present invention, the vertical plate portion of the shutter is screwed to the side surface of the sliding member without applying pressure.
The shutter is mounted so that it can move somewhat relative to the sliding member. Thereby, the shutter can be mounted slidably in parallel along the upper and lower halves, and the shutter is not forcibly distorted and mounted with respect to the upper and lower halves.

〔Example〕

Hereinafter, an embodiment in which the present invention is applied to a disk cartridge using a writable disk such as an optical disk or a magneto-optical disk will be described with reference to FIGS. 1 to 3. Note that the same structural parts as in the prior application example shown in FIGS. 4 and 5 are given the same reference numerals, and their explanations are omitted.

In the present invention, as shown in FIGS. 1 and 2, two spacers 21 are integrally molded and provided on the side surface 14a of a sliding member 14 such as a rack made of synthetic resin, etc. The inner diameter A of the two holes 22 for screw insertion provided in the vertical plate part 10 is constructed to be slightly larger than the outer diameter B of the spacer 21, and the thickness C of the spacer 21 is set to the plate thickness D of the vertical plate part 10. It has a slightly larger structure, and a prepared hole 23 for screwing is formed in the center of the two spacers 21.

When installing the shutter 8, insert the two blank holes 22 into the outer peripheries of the two spacers 21, respectively, screw the two screws 15 for self-tapping into the two pilot holes 23, and screw the screw heads into the two pilot holes 23. 15a
the end surface 2 of the spacer 21 at the outer periphery of each hole 22.
1a, the vertical plate 10 is screwed to the side surface 14a of the sliding member 14 in a non-pressurized state using these two screws 15.

That is, the vertical plate portion 10 of the shutter 8 is screwed with some play between the screw heads 15a of the two screws 15 and the sliding member 14.

Therefore, according to the present invention, as shown in FIG. 1, the shutter 8 moves slightly in the vertical direction (in the direction of arrow b) and in the longitudinal direction (in the direction of arrow c) with respect to the sliding member 14 in the state in which the shutter 8 is fixed with the screws. Because you can
If the shutter 8 is forcibly distorted relative to the upper and lower halves 2 and 3 by tightening the screw 15,
Depending on the processing accuracy of the shutter 8 and the installation accuracy of the sliding member 14, the shutter 8 may be
It will not be installed in a distorted state with respect to 3. Then, set shutter 8 to upper and lower half 2,
3 can be slidably mounted in parallel.

That is, the pair of upper and lower horizontal plate portions 9 of the shutter 8 tend to always be in a horizontal state parallel to the upper and lower halves 2 and 3, and when the shutter 8 slides in the direction of arrow a in FIG. is upper and lower half 2,
3 recess 11, guide groove 16 or guide plate 17
It will not be pressed too hard and slide.

FIG. 3 shows a modification of the present invention, in which the spacer 2 is a separate member from the sliding member 14.
5, the shutter 8 is fixed with screws in the same manner as in FIG.

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and various effective changes can be made based on the technical idea of the present invention.

For example, the disc used in the present invention does not have to be a double-sided recording disc, but may be a single-sided recording disc.

Further, the shutter may be made of a bent metal plate other than a stainless steel plate.

Furthermore, the present invention is not limited to those using writable disks such as optical disks and magneto-optical disks, but can be applied to various disk cartridges using various recording and/or reproducing disks.

[Effect of idea]

This invention allows the shutter to be installed parallel to the upper and lower halves, so that the shutter is not forcibly distorted when installed with respect to the upper and lower halves. There is no possibility of sliding due to strong pressure. Therefore, the sliding resistance of the shutter can be minimized, and the shutter can be opened and closed smoothly with a small force. Further, it is possible to prevent the upper and lower halves from being scratched at an early stage due to the horizontal plate portion of the shutter being strongly pressed against and sliding against the upper and lower halves.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the disk cartridge of the present invention, in which Figure 1 is an enlarged sectional view of the main part, Figure 2 is a perspective view of the main part, and Figure 3 is a perspective view of the main part. FIG. 7 is an enlarged sectional view of a main part of a modification. FIG. 4 is a perspective view of the entire disk cartridge of the prior application, and FIG. 5 is an enlarged sectional view taken along the line of FIG. 4. In the symbols used in the drawings, 1...Disk, 2...Upper half, 3...Lower half, 4...Cartridge, 7...Optical head insertion hole, 8...Shutter, 9...Horizontal plate part, 10... Vertical plate part,
13...Guide shaft, 14...Sliding member, 14a...
...Side surface of sliding member, 15...screw, 15a...screw head, 21...spacer, 22...blind hole, 25...
It is Maza.

Claims (1)

[Claims for Utility Model Registration] A cartridge formed with an opening that exposes a portion of the disk to the outside and shaped to rotatably accommodate the disk, and a horizontal plate that opens and closes the opening. a shutter having a substantially U-shaped cross section and having a vertical plate part connected to the horizontal plate part, a portion of which is exposed from one side of the cartridge, and provided slidably within the cartridge The vertical plate portion of the shutter is provided with a sliding member fixed by a plurality of screws to a portion exposed from one side of the cartridge, and the vertical plate portion of the shutter is provided with a plurality of screw insertion holes. At the same time, a plurality of spacers having a thickness greater than the thickness of the vertical plate of the shutter are inserted into the plurality of holes, and the plurality of screws are inserted into the spacers from the outside of the vertical plate of the shutter. is inserted into the sliding member, and the screw heads of the plurality of screws are tightened to the end faces of the plurality of spacers, and the screw heads of the plurality of screws and the sliding member are connected vertically to the shutter. A disk cartridge that is characterized by a plate part that is sandwiched in a loose manner.