JPS62110683A - Disk cartridge - Google Patents

Abstract

PURPOSE:To easily open and close a reading hole and to improve the strength and the life of a shutter by constituting the shutter which shields the reading hole at the side plane of a cartridge main body in such a way that the shutter can turn setting the outer part of a disc within the cartridge main body as a fulcrum. CONSTITUTION:In the normal state of a disk cartridge 10, a shutter 16 shields all of a reading hole 14, a driving hole 13, and a sensor reading hole 15 formed on the cartridge main body by the function of a spring 19. When the cartridge is used, the cartridge is inserted only into a recording and reproducing device in the direction shown as arrow head A. Following an insertion, a pin at the recording and reproducing device presses an abutting piece 18C at an operating member 18, then moving it in arrow head B direction. Following a movement, the shutter 16 turns in a clockwise direction, opening each of the holes, and normal recording and reproduction can be performed. Also, when the cartridge is taken out from the recording and reproducing device, the shutter 16 returns automatically to its original closing position by the spring 19, closing each hole and protecting a disc inside. Thus, the opening closing of the shutter can be easily performed, and the strength is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a disk cartridge containing a disk for recording information such as a magnetic disk or an optical disk.

BACKGROUND OF THE INVENTION In general, information recording disks such as magnetic disks and optical disks have an opening (hereinafter referred to as 1 drive hole) for inserting a drive device in the center of both sides, and a slot (hereinafter referred to as 1 drive hole) for inserting a reading head on one or both sides. It is housed and held in a cartridge body having a reading hole (hereinafter referred to as a reading hole). In such a disc cartridge, dust and dirt enter the reading hole and adhere to the disc, which tends to cause dropouts in the signal reproduced from the disc. Therefore, in order to prevent dust, dirt, etc. from entering the cartridge, a cartridge equipped with a shutter has been proposed (for example,
8-130475, JP-A-58-102370, JP-A-59-107466, etc.).

The shutters that have been proposed in the past can be roughly divided into a rotating type shown in FIG. 5 and a sliding type shown in FIG. 6. To explain this simply, in Fig. 5, 1 is the cartridge body, 2 is the shutter, and the shutter 2
is provided so as to be able to rotate concentrically with the disk (not shown) and move between a position where the reading hole 3 is covered and a position where it is opened.

Further, in FIG. 6, a shutter 5 having a hole 4 having the same shape as the reading hole 3 is provided so as to be movable in a straight line, and as the shutter 5 moves, the hole 4 overlaps the reading hole 3.
is open, and in other cases, the reading hole 3 is blocked by the shutter 5.

The problem that the invention aims to solve However, all of the above configurations had problems.

That is, in the one shown in FIG. 5, since the center of rotation of the shutter 2 is at the drive hole of the cartridge body, the mechanism for rotatably holding the shutter is arranged in the narrow part between the disk and the side plate of the cartridge body. Must be,
The strength cannot be made strong enough, it is easy to break, and
The cartridge becomes thicker. Furthermore, it is not possible to shield the drive hole with this construction. In addition, in the mechanism shown in Fig. 6, the shutter moves in a straight line, so the movement is slow, and in particular, since it is biased in one direction by a spring, the movement often causes poor opening/closing. In the mechanism shown in FIG. 6, it is possible to block the central drive hole by making the shutter larger, but as the shutter becomes larger, the movement of the shutter becomes worse, making it extremely difficult to put it to practical use.

The present invention was made in view of such conventional problems, and an object of the present invention is to provide a disk cartridge equipped with a shank that can easily open and close the reading hole and has sufficient strength and life. do.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a shutter that is rotatable about a fulcrum located radially outward of the disk, and that at least has a position that blocks the reading hole. The first driving hole and the reading hole are movably provided in a position where they are not blocked, and one end of the operating member is fixed to the shutter, and the other end of the operating member is movable along the side of the cartridge body. It is equipped with a configuration in which it is placed.

According to the above-described structure, the portion of the present invention that rotatably supports the shutter is the outer portion of the disk inside the cartridge body, so the usable space is large. It is easy to design and can be designed to have sufficient strength, reducing damage during use. Further, since the shutter does not move linearly but rotates, the movement is extremely smooth, and the necessary turning angle is smaller than when the turning center is centered on the disk, making it easy to move. Furthermore, by increasing the area of the shutter, it becomes possible to shield not only the reading hole but also the drive hole and the sensor reading hole for detecting the disk position.

EXAMPLES The present invention will be described in detail below. FIGS. 1 and 2 are plan views showing a disk car 1-1 according to an embodiment of the present invention. FIG. In Figure 2, the disk is also shown removed. Further, FIG. 1 shows a state in which the shutter is closed, and FIG. 2 shows a state in which the shutter is opened. In FIGS. 1 and 2, 10 indicates the entire disk cartridge. The disk cartridge 10 has a flat box-shaped cartridge body 11 formed by a pair of side plates 11A (only one shown) facing each other and fixed thereto, and a disk 12 housed inside the cartridge body 11. Each side plate 11A has a drive hole 13 for inserting a drive mechanism for driving the disk 12, and a reading hole 14 for inserting a reading head.
A sensor reading hole 15 is formed into which a position detection sensor is inserted. Reference numeral 16 denotes a shutter, one end of which is rotatably held at a corner of the cartridge body 11 via a pin 17, and an operating member 18 is attached to its fulcrum. To explain in more detail, as shown in FIG.
8 is attached, and the pin 17 is rotatably held by the side plate 11A. The shutter 16 and the operating member 18 are provided with a groove 18A on the side of the operating member 18 facing the shutter,
By raising and inserting a portion 16A of the shutter 16 into the groove 18A, the shutter 16 can be rotated together. Note that the pin 17 may be fixed to the side plate 11A, and the operating member and shutter may be rotatable with respect to the pin 17. Further, the pin 17 may be integrally constructed with the operating member 18.

A spring 19 is arranged around the pin 17, one end of the spring 19 is restrained by the car 1-IJ body 11, and the other end is fixed to the rising portion 16A of the shutter 16.

This spring 19 serves to keep the shutter 16 normally in the position shown in FIG. 1, ie, in the closed position. .

The operating member 18 has an elongated flexible portion 18B extending from a portion overlapping the shutter 16 and an abutment piece 18C at the tip thereof. The abutting piece 18C is movable along the side of the cartridge main body 11, and when the cartridge 10 is installed in a recording/reproducing device (not shown) in the direction of arrow A, it is attached to a pin of the recording/reproducing device. It engages and moves in the direction of arrow B along the side of the cartridge main body, and acts to open the shutter 16. The shape of the shutter 16 is such that when it is in the closed position, as shown in FIG. 1, it closes the reading hole 14, drive hole 13, and sensor reading hole 15, but in the open position, as shown in FIG. 2, it can open each hole. A presser plate 20 is provided near the end of the shutter 16 on the opposite side from the pin 17 . This presser plate 20
supports the edge of the shutter to prevent the shutter from contacting the disk 12, as shown in FIG.

The illustrated shutter 16 opens and closes each hole of the lower side plate 11A, and although not shown, a similar shutter is also provided on the upper side plate. The shutters for the upper side plates are arranged symmetrically in FIGS. 1 and 2 with respect to the illustrated shutter 16.

In the disk car IJ jig 10 having the above structure, in the normal state, the shutter 16 is in the closed position as shown in Fig. 1 due to the action of the spring 19. The holes, sensor reading holes, etc. are all shielded to ensure that dust and dirt cannot enter the cartridge. When using a cartridge, simply insert the cartridge into the recording/reproducing apparatus in the direction indicated by arrow A in FIG. As the cartridge is inserted, a pin of the recording/reproducing device pushes the abutting piece 18C of the operating member 18 and moves the abutting piece 18C in the direction of arrow B. With this move,
The shutter 16 rotates clockwise, and the shutter 16
is rotated clockwise and moved to the open position shown in FIG. 2, each hole is opened, and normal recording and playback are performed. Also, when the cartridge is removed from the recording/playback device, the shutter 16
The spring 19 automatically returns to the original closed position, closing each hole and protecting the discs inside.

In the above embodiment, the pin 17, which is the center of rotation of the shutter 16, is placed at the corner of the rectangular cartridge body 11, but the fulcrum position is not limited to the corner, and is located at the radial direction of the disk 12. Anywhere outside is fine. however,
If the corner is used as in the embodiment, the distance from the outer periphery of the disk can be increased, and the turning angle of the shutter can be reduced. Further, in the above embodiment, the drive hole and the sensor reading hole are also covered by the shutter, but it goes without saying that a shutter large enough to cover only the reading hole 14 may be used if it is not necessary.

Effects of the Invention As explained above, in the present invention, the shutter that shields the reading hole on the side surface of the cartridge body can be rotated using the outer part of the disk in the cartridge body as a fulcrum, so that a structure that supports the shutter in a rotatable manner is provided. The usable space is large, which makes it easy to design the structure that supports the shutter so that it can pivot, and it can be designed to have sufficient strength, reducing shutter failures and extending the service life. It is possible. In addition, since the shutter does not move in a straight line but rotates, the movement is extremely smooth, and the required turning angle is smaller than when the turning center is around the disk center, making it easier to move. , the shutter can be opened and closed reliably. Furthermore, by increasing the area of the shutter, it is possible to shield not only the reading hole but also the drive hole and the sensor reading hole for detecting the disk position, ensuring the protection of the internal disk. can.

[Brief explanation of drawings]

FIG. 1 shows a disk cartridge 7 according to an embodiment of the present invention, and is a plan view with one side plate (upper side) of the cartridge main body removed, and FIG. 2 shows the disk cartridge described above. , force t-'J A plan view showing one (upper) side plate of the nozzle main body and the disk removed, and FIG. 3 is a cross section of the above-mentioned disk cart nozzle as seen in the direction of the t'' arrow in FIG. 2. 4 is a cross-sectional view of the disk cartridge as seen in the direction of the IV-IV arrow in FIG. 2, and FIG. 5 shows an example of a conventional disk cartridge, with the upper side plate and disk removed. FIG. 6 is a plan view showing another example of the conventional disker h IJ. 10 Disk cartridge, 11... Cartridge body, IIA... Side plate, 12... Disc, 13...
Drive hole, 14... Reading hole, 15 ・Sensor reading hole,
16. Nya soter, 17.. Pin, 18.. Operating member, 18B.. Flexible portion, 18C.. Contact piece, 1
9. Spring, 20. Holding plate. Name of agent: Patent attorney Toshi Nakao (only 1 person!) 2
~ Di Mata 7 /3- 96th shift■ /4--*Gripping hole 2 2 "[: ''3 Figure 4 Circle Figure 5 Figure 6

Claims (2)

[Claims] (1) An information recording disk and a cartridge body containing this disk, which has a drive hole in the center of both sides for insertion of a drive mechanism that drives the information recording disk, and at least one side has a drive hole in the radial direction of the disk. a cartridge body having a reading hole extending therein; and a cartridge body disposed within the cartridge body and pivotable about a fulcrum located radially outward of the disk, the cartridge body having at least a position that covers the reading hole and the drive hole; and a shutter movable to a position that does not block the reading hole, and an operating member for opening and closing the shutter, one end of which is fixed to the shutter and the other end of which is movable along the side of the cartridge body. A disc cartridge characterized by having a member. (2) The disk cartridge according to claim 1, wherein the shutter has an area that covers the reading hole and the drive hole.