JPH0715786B2 - Disco Cartridge - Google Patents

Description

The present invention relates to a disk cartridge such as a magnetic disk cartridge, an optical disk cartridge, and an optical-magnetic disk cartridge, and more particularly to opening and closing a head insertion opening. The present invention relates to a disk cartridge having a shutter to perform.

[Conventional technology]

FIG. 4 is a schematic top view of this type of magnetic disc cartridge, FIG. 5 is a side sectional view, and FIGS. 6 and 7 are partially enlarged sectional views. Explain the ledge.

The magnetic disk cartridge is mainly composed of a cartridge case 1 made of a hard synthetic resin, a magnetic disk 2 rotatably housed in the case 1, and a shutter 3 slidably supported by the cartridge case 1. It is configured.

The cart case 1 is formed by joining an upper case 1a and a lower case 1b. An opening 4 is formed at the center of the lower case 1b, and a head insertion port 5 is provided near the opening 4. Since the shutter 3 slides on the head insertion opening 5, the upper surface in the vicinity of the head insertion opening 5 is somewhat lowered to form a concave portion 6, and further in the concave portion 6 in the vicinity of the end surface of the cartridge case 1. A guide groove 7 extending along the sliding direction of the shutter 3 is provided.

The shutter 3 is made of, for example, a metal plate such as a stainless steel plate and has a U-shaped lateral shape. Both sides are located in the recess 6 of the cartridge case 1, and the head insertion opening 5 is opened and closed. Further, as shown in FIG. 6, two pairs of claws 3a are provided on the inner walls of both sides of the shatter 3, and the claws 3a are fitted into the guide grooves 7 of the cartridge case 1, and the shatter 3 is slid. It guides the moving direction and holds the shutter 3 so as not to drop it from the cartridge case 1.

The spring member 8 for urging the shutter 3 in the closing direction is
As shown in the figure, it is housed in the cartridge case 1. The spring member 8 is composed of a torsion coil spring and has one arm 8a.
Is engaged with the inside of the cartridge case 1, and the other arm 8b is bent so that the tip 8c is locked in the lateral groove 3c of the foot 3b hanging from the upper wall of the shutter 3 as shown in FIG. It is a thing.

[Problems to be solved by the invention]

For the conventional magnetic disk cartridge as described above,
When the shutter 3 is assembled, either side of the U-shape is somewhat widened, or both side walls of the cartridge case 1 are slightly closed and fitted into the cartridge case 1, and the claw 3a is fitted into the guide groove 7. However, since both side walls of the cartridge case 1 are extremely thin, their elastic force is small and the shutter 3 is easily detached.

The object of the present invention is to eliminate such drawbacks of the prior art,
The purpose is to provide a disk cartridge that does not easily come off.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention has, on the inner wall of the cartridge case, a restricting portion which is engaged with a part of the arm of the spring member that engages with the shutter and is formed along the sliding direction of the shutter. The spring member is prevented from coming off by the restricting portion, so that the shutter engaged with the spring member is also prevented from coming off via this spring member.

〔Example〕

FIG. 1 is a plan view of a magnetic disk cartridge according to an embodiment of the present invention, FIG. 2 is an enlarged view of an essential portion of the embodiment, and FIG. 3 is an enlarged sectional view of an essential portion of the embodiment.

The basic structure of the cartridge case 1, the magnetic disk 2, the shutter 3, the opening 4, the head insertion opening 5, the recess 6, the guide groove 7, the spring member 8 and the like is the same as that of the conventional magnetic disk cartridge described above. Therefore, detailed description is omitted.

In the embodiment, the shutter 3 is made of a synthetic resin such as polyacetal resin or polyamide resin, which is slightly softer than the cartridge case 1 and elastically deformable. Two pairs of inwardly projecting claws 3a are integrally formed on the upper inner surface of both side walls of the shutter 3, and the claws 3a are slidable in the guide groove 7 formed above the concave portion of the cartridge case 1. Is fitted to.

At the center of the connecting part that connects both sides of this shutter 3,
Feet 3b as shown in FIG. 2 and FIG.
A lateral groove 3c is provided on one side of the foot 3b.

On the other hand, the end of the cartridge case 1 covered with the connecting portion of the shutter 3 is an opening, and the spring member 8 is housed in the space 9 inside the opening. The spring member 8 is a torsion coil spring, and one arm 8a engages with the inner wall of the case above the space 9, and the other arm 8b has a tip 8c bent into a lateral groove 3c provided in the foot 3b of the shutter 3. Engaged. The twisted portion 8d of the spring member 8 is free in the space 9 and the shutter 3
Moves along with the sliding movement of the air gap 9, and the bent portion 8e is formed by a bent portion 8e between the twisted portion 8d and the tip portion 8c.
Lateral movement is prevented by the inner wall surfaces on both sides of the space 9 on both sides.

Further, a groove 10 is formed on one inner wall of the void 9 so as to extend along the sliding direction of the shutter 3. The tip portion 8c of the spring member 8 is engaged in the groove 10, and the upper wall of the groove 10 serves as a restricting portion 11 that prevents the spring member 8 from moving upward.

Therefore, when the shutter 3 is slid against the elastic force of the spring member 8, the claw 3a of the shutter 3 is guided and moved by the guide groove 7 to open the head insertion port 5. At this time, the tip portion 8c of the spring member 8 slides in the groove 10 and is prevented from moving upward by the regulating portion 11. Even if force is applied to the shutter 3 in the direction of removing the shutter, the spring member 8
However, since the movement is blocked by the restricting portion 11 as described above, the shutter 3 engaged with the spring member 8 at the lateral groove 3c does not fall out of the cartridge case 1. Also, the spring member 8
A foot 3b provided with a lateral groove 3c that engages with is formed near the central portion of the shutter 3 in the moving direction (left-right direction in FIG. 1). Therefore, the shutter 3 has a head insertion opening 5
Is closed (because of the head insertion port 5 there is no guide groove 7 for engaging the claw 3a of the shutter 3 at this portion, and the tip portion of the shutter 3 is held specially at this portion). In this case, the central part of the shutter 3 is locked to prevent the shutter 3 from coming off, and the retaining effect is more reliable than the one locked at a position biased to either the front or back. It is said.

In the above embodiment, the tip end portion 8c of the spring member 8 is grooved.
Although the restriction portion 11 that engages in the inside of the groove 10 and prevents the upper wall of the groove 10 from coming off is provided, the groove 10 is not necessarily provided, and the point is that the spring member 8
It suffices to form a restricting portion that prevents upward movement of the tip portion of the.

Further, although the torsion coil spring 8 is used as the spring member 8 in this embodiment, it is obvious that a leaf spring may be used.

[Effect]

As described above, according to the present invention, the tip of the spring member for urging the shutter is engaged with the inner wall of the cartridge case so as to prevent the shutter itself from engaging with the spring member through the spring member. It was done. Therefore, even if the engagement holding force between the shutter and the cartridge case is lowered due to deformation of both sides of the shutter or the deformation of the cartridge case when the shutter is attached to the cartridge case, the spring member causes the shutter to fall. Is securely held in the cartridge case, and its opening and closing operation is stable. Moreover, as a structure for that purpose, it is sufficient to extend the tip of the spring member to some extent as compared with the conventional one, and to simultaneously form the restriction portion at the time of molding the cartridge case, so that the manufacturing cost is extremely simple. Will never rise.

[Brief description of drawings]

FIG. 1 is a partial plan view of a magnetic disk cartridge according to an embodiment of the present invention, FIG. 2 is an enlarged view showing an engaging portion between a shutter and a spring member according to an embodiment of the present invention, and FIG. 3 is an enlarged sectional view of the same portion. 4 and 5 are plan views showing the outline of a magnetic disk cartridge of this type, FIG. 5 is a sectional view showing the outline of a similar magnetic disk cartridge, and FIG. 6 is a schematic diagram of a magnetic disk cartridge of this type. FIG. 7 is an enlarged cross-sectional view of the engaging portion between the cartridge member and the cartridge case, and FIG. 7 is an enlarged sectional view of the engaging portion between the spring member and the shutter in the same magnetic disk cartridge. 1 ... Cartridge case, 2 ... Magnetic disk, 3 ...
... Shutter, 3a ... Claw, 5 ... Head insertion port, 7 ... Guide groove, 8 ... Spring member, 8a, 8b ... Spring member arm, 8c
...... Spring member tip, 11 …… Regulator.

Claims (1)

[Claims] 1. A cartridge case that rotatably stores a disk, a shutter that is slidably attached to a side surface of the cartridge case, and that opens and closes a head insertion opening of the cartridge case, and is housed in the cartridge case. It is equipped with a spring member that engages one arm with the cartridge case and the other arm with the shutter, and always biases the shutter in one direction.The guide groove formed on the outer surface of the cartridge case is used as the shutter. In a disk cartridge in which the provided claw is engaged to slidably hold the shutter in the cartridge case, the cartridge case includes the other arm of the spring member engaged with the shutter. A disk car, in which a spring member slip-out preventing restricting part to which a part of the disk is locked is formed along the sliding direction of the shutter. Ritsuji.