JPH0345342Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is such that a disk is rotatably stored in a cartridge consisting of an upper and lower half, and the disk is recorded and/or played back by being attached to a disk player. This relates to a disk cartridge.

[Prior art]

Conventionally, a disk is rotatably housed in a cartridge consisting of upper and lower halves, and at least one of the upper and lower halves has a circular center hole facing the center hole of the disk and an approximately rectangular shape connected to the center hole. A shutter for opening and closing only the head insertion opening is stacked on one of the upper and lower halves, and one end of the shutter is attached to a sliding guide provided along one edge of the cartridge. When the shutter is moved back and forth between the closing position where the head insertion opening is closed and the closing position where the shutter is moved to the side, the shutter faces the center hole. The reciprocating locus of the end portion is configured to cross the central hole, and when attached to the disk, the shutter is moved from the closed position to the open position to open the opening, and the head is inserted into the opening. Some discs are designed to perform recording and/or playback on a disc.

[Problem that the invention attempts to solve]

However, in this type of disk cartridge, since the opening is connected to the central hole, even if the sliding guide can be provided at one end of the shutter, it is not provided at the opposite end. On the free end side facing the center hole on the side, it is not possible to provide a free end guide of the shutter that extends across the center hole of the half and reaches the closed lid position of the shutter. For this reason, especially at the free end of the shutter, the corner part tends to unexpectedly float up from the half in the direction of return movement from the open lid position to the closed lid position, resulting in a really poor finish. Conventionally, the corner of the free end of the shutter in the forward movement direction from the closed position to the open position is connected to a lifting prevention guide provided on the one half in parallel with the reciprocating direction of the shutter. It is pressed down from above to prevent the corners from lifting up.

The present invention prevents the corner of the free end of the shutter on the side in the return movement direction from the open lid position to the closed lid position from floating up from the half when the shutter is moved back to the closed lid position. This makes it possible to prevent this from happening.

[Means for solving problems]

The present invention provides the above-mentioned disk cartridge, in which the free end of the shutter is guided and slid by the corner on the forward movement side from the closed position to the closed position. a free end guide provided from the lid open position to the center hole, and a state in which the shutter is returned to the lid closed position;
In order to prevent the corner of the shutter from the opening position to the closing position on the return direction side from floating above the half, the end of the head insertion opening of the half on the return direction side. This is a disk cartridge equipped with a floating guide provided at a portion of the cartridge.

[Effect]

The present invention prevents floating of the half of the corner on the side of the return movement from the open position to the closed position at the free end of the shutter when the shutter is moved back to the closed position. can be prevented.

〔Example〕

An embodiment of the disk cartridge of the present invention will be described below with reference to the drawings. In this embodiment, a disk called a draw disk (DRAW-DISC) is used that can be written (recorded) and read (reproduced) by an optical method, a magneto-optical method, or the like.

First, a disk cartridge 1 has a disk 5 horizontally housed in a cartridge 4 consisting of upper and lower halves 2 and 3 molded from synthetic resin or the like, and the upper and lower halves 2 and 3 are fitted from above and below. They are fitted together and secured with screws, etc. The disk cartridge 1 is constructed as a so-called A and B double-sided disk cartridge in which recording surfaces are formed on both the upper and lower surfaces of the disk 5.

Next, the upper and lower halves 2 and 3 have a pair of upper and lower circular central holes 7 corresponding to the central hole 6 of the disk 5, and a pair of upper and lower approximately rectangular head insertion openings 8 connected to the central holes 7. is provided. The openings 8 are located between the front edge 4a of the cartridge 4 and the center holes 7 on both the left and right edges 4 of the cartridge 1.
It is provided at the center position between b and 4c. Further, on both upper and lower surfaces 2a and 3a of the upper and lower halves 2 and 3, a pair of upper and lower recesses 9 with wide widths are provided which are lowered one step lower from both openings 8 to the one end edge 4b side.

Next, the shutter 11 is molded from a metal plate such as a stainless steel plate or a hard synthetic resin, and has a roughly rectangular cross section, and is integrated with a pair of upper and lower shutter plates 12 at the side surfaces. and a side plate 13 connected to the side plate 13. The shutter 11 is arranged such that both shutter plates 12 are stacked in the recesses 9 of the upper and lower halves 2 and 3 from above and below. A guide shaft 14 is installed horizontally between the upper and lower halves 2 and 3 along the front edge 4a of the cartridge 4, and the side plate of the shutter 11 is attached to a sliding guide 15 that is guided and slid by the guide shaft 14. 13 is fixed by a pair of screws 16 or the like. Therefore, the shutter 11 is
One end 11 which is the front edge 4a side of the cartridge 4
a is guided by the sliding guide 15 along the front edge 4a of the cartridge 4 to the closing position where both openings 8 are closed as shown in FIG. It is configured to be able to freely reciprocate in the directions of arrows a and b between the lid opening position moved to the one end edge 4b side). Also, both center holes 7 of the shutter 11
An arcuate edge 17 having the same radius as both central holes 7 is formed at the end edge of both shutter plates 12 at the free end portion 11b facing the shutter plate 12 .

By the way, according to the disk cartridge 1 configured in this way, when not in use such as during storage, the shutter 11 is moved in the direction of the arrow by a double-acting urging spring (not shown) built into the cartridge 4. b
direction and returned to the closed position, opening both openings 8.
is closed from above and below by both shutter plates 12. When this disk cartridge 1 is used, this is a disk player (not shown).
When the shutter 11 is attached to the lid, the shutter 11 is slid in the direction of the arrow a against the spring and reciprocated to the lid opening position, and both openings 8 are opened. Then, a head or the like is inserted into one or both of the openings 8, and the disk 5 is rotated within the cartridge 1 by a turntable (none of which is shown) to perform desired recording or reproduction.

Therefore, in the disk cartridge 1 of the present invention, as shown in FIGS. 2 and 4, the free end 11b of the shutter 11 is moved from the open lid position to the closed lid position in the backward movement direction (direction of arrow b). A pair of upper and lower floating prevention guides 19 that prevent one pair of upper and lower corners 12a of both shutter plates 12 from floating are attached to the edge 8a of both openings 8 of the upper and lower halves 2, 3 on the side opposite to the open position side. and are integrally provided at the ends facing both central holes 7. At this time, both corner portions 12a are cut inward from the shutter plate 12 so as to be one step lower by approximately the thickness of the plate. Further, as shown in FIGS. 3 and 5, the other pair of upper and lower corner portions 12b of both shutter plates 12 are located at the free end 11b of the shutter 11 in the reciprocating direction (direction of arrow a) from the closed lid position to the open lid position. teeth,
These are a pair of upper and lower free end guides made of synthetic resin plates or the like that are parallel to the reciprocating direction (directions of arrows a and b) of the shutter 11 fixed to the upper and lower surfaces 2a and 3a of the upper and lower halves 2 and 3 by adhesive or the like. Anti-surfacing guide 20
It is held down from above and below by As shown in FIG. 4, there are two grooves between the edges 8a of the openings 8 of the upper and lower halves 2, 3 on the side opposite to the opening position of the center hole 7 and the floating prevention guides 19. A notch 21 is provided between one edge 12c of the shutter plate 12 and the corner 12a into which the bent portion 12e is inserted. Further, as shown in FIGS. 2 and 5, shutters 11 are placed on the ends of the openings 8 of the upper and lower halves 2 and 3 on the open position side edges 8b on the center hole 7 side, and move the shutters 11 to the open position. A pair of upper and lower recesses 22 are provided into which the one corner portion 12a can fit when the recesses 22 are bent.

According to the disk cartridge 1 of the present invention constructed as described above, as shown in FIGS. 2 and 4, when the shutter 11 is moved back to the closed lid position, both shutter plates at the free end 11b are closed. 1
Since both corner portions 12a, 12b in the reciprocating direction of 2 are inserted under the floating prevention guides 19, 20, there is absolutely no possibility that these corner portions 12a, 12b will unexpectedly float above and below the upper and lower halves 2, 3. do not have. In addition, when the shutter 11 is returned to the closed position, both edges 1 of both shutter plates 12 in the reciprocating direction are
2c and 12d are stacked on both end edges 8a and 8b of both openings 8, so both shutter plates 1 are moved by external force.
2 is prevented from accidentally falling inside both openings 8. Therefore, the rigidity of both shutter plates 12 of the shutter 11 in the closed state is extremely high.

As shown in FIGS. 3 and 4, when the shutter 11 is moved from the closed position to the open position in the direction of arrow a, both raised surfaces are formed on the other two corners 12b of both shutter plates 12. It is slid along the lower surface of the prevention guide 20. Then, when the shutter 11 is moved forward to the lid open position, one of both corner portions 12a of both shutter plates 12 enters into both recessed portions 22.

Although one embodiment of the present invention has been described above, various effective modifications can be made based on the technical idea of the present invention.

For example, in the embodiment, since the disk cartridge 1 is shown using both sides A and B, the upper and lower halves 2 and 3 are
An opening 8 is provided in the disc 5, and the opening 8 is opened and closed by a shutter 11 having a substantially rectangular cross section. For example, an opening 8 is provided in only one half of the upper and lower halves 2 and 3, and only this one opening 8 is used for the shutter 11.
It is fine as long as it has a structure that opens and closes.

Further, the sliding guide 15 that guides the one end portion 11a of the shutter 11 is not limited to that shown in the embodiment, and may have any other structure or shape.

Furthermore, the present invention is not limited to disk cartridges that house draw disks, but can be applied to disk cartridges that house various types of recording and/or playback disks.

[Effects of the invention] The present invention has a circular central hole facing the central hole of the disk in the half of the cartridge, and an approximately rectangular head insertion opening connected to the central hole. A shutter that opens and closes only the half is placed on top of the half, and when the shutter is moved back and forth between the opening position where the head insertion opening is opened and the opening position where it is moved to the side of the opening. Since this is a disc cartridge configured so that the reciprocating movement of the free end facing the central hole of the shutter crosses the central hole, the shutter's free end guide can be moved across the central hole of the half to open the shutter. Although the disk cartridge cannot be installed up to the lid closing position, when the shutter is moved back to the closed lid position, the free end of the shutter can be moved from the opening position to the closing position. Since it is possible to prevent the corner from floating up from the half, the raised corner may accidentally get caught on another object or cause damage to the shutter, and the opening and closing operations of the shutter (especially when the disk cartridge is removed from the disk player) There is no inconvenience caused at all, such as when the device is attached to the device and opened/closed, resulting in extremely high safety and reliability. Further, as shown in the embodiment, the floating prevention guides at the corners can be easily integrally molded into the upper and lower halves, so manufacturing is very easy and low cost.

[Brief explanation of drawings]

The drawings show an embodiment of a disk cartridge to which the present invention is applied, in which Fig. 1 is a perspective view, Figs. 2 and 3 are plan views of the main parts showing the shutter in the open and closed state, 4 and 5 are enlarged cross-sectional views taken along the line in FIG. 2 and the line in FIG. 3, respectively. In addition, in the symbols used in the drawings, 1...Disk cartridge, 2...Upper half, 3...Lower half, 4...Cartridge, 5...Disk,
6... Center hole, 7... Center hole, 8... Opening, 11
... Shutter, 12 ... Shutter plate, 12a
...Corner part on the backward movement direction side of the shutter, 12b...
A corner portion on the backward movement direction side of the shutter, 15...sliding guide, 19... floating prevention guide, 20... floating prevention guide which is a free end guide.

Claims (1)

[Claim for Utility Model Registration] A disk is rotatably housed in a cartridge consisting of upper and lower halves, and at least one of the upper and lower halves has a circular center hole facing the center hole of the disk and is connected to the center hole. a roughly rectangular head insertion opening, and a shutter that opens and closes only the head insertion opening is stacked on one of the upper and lower halves, and one end of the shutter is provided along one end edge of the cartridge. When the shutter is guided by a sliding guide and reciprocated between a closed position where the head insertion opening is closed and a closed position where the shutter is moved to the side thereof,
In a disk cartridge configured such that the reciprocating locus of the free end of the shutter facing the central hole crosses the central hole, the forward movement direction of the free end of the shutter from the closed position to the closed position. a free end guide provided on the half from the lid opening position to the central hole in order to guide and slide the side corners; and a free end guide provided on the half from the lid opening position to the central hole; , In order to prevent the corner of the shutter from the opening position to the closing position on the return direction side from floating above the half, the head insertion opening of the half is closed on the return direction side. What is claimed is: 1. A disk cartridge characterized by comprising a floating prevention guide provided at an end.