JPH06180959A - Disk cartridge - Google Patents

Abstract

PURPOSE:To easily assemble the cartridge by a method wherein one end of a spring constituting an energizing means is supported on the side of a case, the other end is supported on the side of a shutter and the spring is interposed and loaded in a gap between a disk face and the shutter. CONSTITUTION:One end 7p of a spring 7 constituting an energizing means is supported on the side of a case 1, the other end 7r is supported on the side of a shutter 4, and the spring is interposed and loaded in a gap between the shutter 4 and a disk face S. The one end 7p is supported so as to be freely movable by a coupling part 1p along the face direction of the disk face S of the case 1. In such a disk cartridge, the spring 7 is interposed and loaded in the gap between the disk face S of the case 1 and the shutter 4, and the spring 7 which is interposed and loaded has nothing to do with a mechanism inside the case 1 and with a sliding and moving part such as a slider 6 or the like, and the energizing means of the shutter 4 can be formed to be a simple structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk cartridge, and more particularly to a disk cartridge which can be easily assembled because the shutter biasing means has a simple structure.

[0002]

2. Description of the Related Art A disk cartridge is an information recording medium in which a disk is enclosed in a case formed in a substantially rectangular flat plate shape to optically record and hold information. As is well known, the disc cartridge has a window that exposes the disc on the face of the case, and a shutter that is formed movably on the face of the disc parallel to the edge of the case close to the window to open and close the window. And urging means for urging the shutter in the closing direction with respect to the window.

Conventionally, the above-mentioned biasing means is composed of various springs and is arranged at an appropriate position of the case. Then, as an extra space inside the case is utilized, for example, a torsion spring is arranged at a corner of the case and one end is locked to the case side and the other end is locked to the shutter side to bias the shutter. Technology is disclosed (Japanese Patent Publication No. 63-30709)
Issue).

[0004]

By the way, when the biasing means is provided inside the case and the deformation amount corresponding to the movement amount of the shutter is secured in the biasing means as in the conventional disk cartridge. However, there is a problem that the structure becomes complicated due to the interaction with other members such as a disk, and labor saving cannot be achieved in the assembling process. Therefore, an object of the present invention is to provide a disk cartridge which can be easily assembled because the shutter biasing means has a simple structure.

[0005]

In order to solve the above-mentioned problems, according to the present invention, a case is formed which is formed in a substantially rectangular flat plate shape to enclose a disc and a window is formed on the disc surface to expose the disc. A shutter which is movably formed on the board surface in parallel with an edge portion of the case close to the window to open and close the window, and an urging means for urging the shutter in a direction to close the window are provided. In the provided disc cartridge, the urging means is composed of a spring having one end supported on the case side and the other end supported on the shutter side, and the spring is a gap between the disc surface and the shutter. It is characterized by being installed in.

[0006]

The spring constituting the urging means has one end supported on the case side and the other end supported on the shutter side, and is interposed in the gap between the board surface and the shutter, and moved in the opening direction. In this case, the shutter is elastically deformed following the movement of the shutter, and the shutter is always urged toward the window in the closing direction.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of a disk cartridge according to the present invention will be described with reference to FIGS. 1 is an overall external view showing an embodiment of a disk cartridge according to the present invention, and FIG. 2 is a plan view showing the behavior of a spring when a shutter is opened and closed. As shown in FIG. 1, the disk cartridge of this embodiment has a case (1) formed in a substantially rectangular flat plate shape.
The disk (2) is enclosed in the structure. The case (1) is formed by joining a pair of case members manufactured by injection molding from a thermoplastic resin such as ABS, and the disc (4) is formed of various conventionally known materials.

On the board surface (S) of the case (1), there is provided a window (3) for exposing the surface of the disk (2) when reading and writing information. This window (3)
Are usually provided on both sides (S) of the disc (2) for reading and writing information on both sides. In addition,
In the disc cartridge shown in FIG. 1, a hub operation hole for exposing the driving hub (2c) arranged at the center of the disc (2) is formed integrally with the window (3), but it is formed separately. May be provided.

The case (1) has a window (3).
In order to prevent the entry of dust from the inside, a shutter (4) that is movably formed on the board surface (S) and that opens and closes the window (3) is attached. The shutter (4) has a substantially vertical U-shaped cross section perpendicular to the moving direction.
The case (1) is attached via a slider (6) to an edge (1e) of the case (1) which is close to the window (3) while sandwiching the case (1) from both board surfaces (S). Further, the open end of the shutter (4) located on the board surface (S) is provided with a steady plate by a pressing plate (5) further attached from the outer surface side. The above-mentioned components are substantially the same as those of the conventional disc cartridge.

In the disk cartridge of this embodiment, the shutter (4) is closed with respect to the window (3) so that the window (3) is always closed when it is taken out from the information processing device or the like. An urging means for urging the device is provided. The above-mentioned urging means has one end (7
q) is supported by the case (1) side and the other end (7r) is supported by the shutter (4) side by the spring (7), and the spring is the board surface (S) and the shutter (4). ) Is installed in the gap.

The spring (7) constituting the urging means is usually formed of a thin wire such as spring steel, piano wire, phosphor bronze or the like into a torsion spring shape. Specifically, the spring (7)
It has a coil part wound about 1 to 3 times in the approximately central part, and both arm parts are formed to be substantially linear in a steady state. However, as the spring (7) of this embodiment, a linear bar or a bar bent in a substantially V shape can be used as well.

By the way, in the present embodiment, the board surface (S) of the case (1) is slightly recessed in a portion corresponding to the moving area of the shutter (4). A minute gap is formed with the shutter (4). Then, by utilizing the above-mentioned gap, as shown in FIG. 1, the spring (7) is inserted. The spring (7) inserted in such a gap, as shown in FIG.
In a state where the shutter (4) is closed, both of the arm portions are arranged so as to be oriented in a direction substantially perpendicular to the moving direction of the shutter.

One end (7q) of the spring (7) has an edge (1
In the vicinity of the window (3) on the (e) side, it is supported by a locking portion (1p) provided on the board surface (S) of the case (1). The locking portion (1p) is provided with a groove opened in the arrangement direction of the spring (7), and the one end (7q) is inserted into the groove, and the surface direction of the board surface (S) is It is formed so as to be movable along. In addition, the other end of the spring (7) (7
In r), the tip is locked to the side edge on the moving region side on the open end side of the shutter (4).

In the disk cartridge of this embodiment, as shown in FIG. 2A, the spring (7) constituting the urging means has one end (7p) supported on the case (1) side and the other end. (7r) is supported on the shutter (4) side and is interposed in the gap between the shutter (4) and the board surface (S).
The one end (7p) is movably supported by the locking portion (1p) along the surface direction of the board surface (S) of the case (1). Therefore, as shown in FIG. 2 (b), when the shutter (4) is moved in the opening direction, the spring (7) buffers the displacement generated at its end at one end (7p) and Since the shutter (4) is elastically deformed following the movement of the shutter (4), the shutter (4) is in the window (3)
Is always urged in the closing direction.

As described above, in the disc cartridge of this embodiment, the spring (7) is only interposed in the gap between the board surface (S) of the case (1) and the shutter (4), and furthermore, it is interposed. The spring (7) is not related to the mechanism inside the case (1) or the sliding part such as the slider (6), and the biasing means of the shutter (4) can be made a simple structure. Therefore, after the case (1) is joined, the spring (7) can be arranged when the shutter (4) is mounted, and the assembly is easy.

The spring (7) of the biasing means shown in this embodiment
May be formed of, for example, a so-called shape memory alloy containing Ti-Ni or Cu-Zn-Al as a main component. In that case, the composition is set in advance so that the temperature at which the phase change occurs is at or below room temperature in order to attain a steady state at about room temperature, and the shape is stored at a temperature higher than room temperature. As described above, when the spring (7) is made of a shape memory alloy, an elastic modulus of about 10 times that of a normal metal spring can be obtained. Therefore, the spring (7) is made into a fine wire having a smaller diameter. It can be formed by the above, and a stronger biasing force can be obtained.

In the disk cartridge of the present invention, the spring (7) which constitutes the biasing means is formed in the shape of a torsion spring, but it can be formed in various shapes that can be elastically deformed on a plane. Further, the biasing means as described above may be provided on both board surfaces of the case (1). Further, although FIG. 1 shows an MO type disc cartridge as an example, the present invention is also applicable to variously standardized WO type or MO type disc cartridges of various sizes. It is feasible.

[0018]

According to the disk cartridge of the present invention, the shutter urging means can have a simple structure and can be easily assembled.

[Brief description of drawings]

FIG. 1 is an overall external view showing an embodiment of a disc cartridge according to the present invention.

FIG. 2 is a plan view showing the behavior of the spring when the shutter is opened and closed.

[Explanation of symbols]

 1 Case 1e Edge 2 Disk 3 Window 4 Shutter 6 Slider 7 Spring 7q One end 7r Other end S Board surface

Claims (1)

[Claims] 1. A case, which is formed in a substantially rectangular flat plate shape, encloses a disk, and has a window opened to expose the disk on a board surface, and a case on the board surface parallel to an edge portion of the case proximate to the window. In a disk cartridge provided with a shutter that is movably formed to open and close the window, and a biasing unit that biases the shutter in a direction to close the window, the biasing unit has one end A disk cartridge, comprising a spring supported on the case side and the other end supported on the shutter side, the spring being interposed in a gap between the board surface and the shutter.