JPH01184772A - Disk cartridge - Google Patents

Abstract

PURPOSE:To remove the sliding of a cartridge at the time of opening/closing a shutter, to prevent the generation of ground powder and to improve the reliability and workability of the title disk cartridge by using a buckling spring type spring to be buckled only at the time of opening a shutter to press a pressure plate. CONSTITUTION:The buckling spring type spring is used, and at the time of opening the shutter 2, the free end of a buckling spring part 2c is hooked on a projection 1b formed on a cartridge 1, and when the shutter 2 is opened, the spring is buckled and the disk 6 is pressed. When the shutter 2 is closed, the spring goes straight again and does not press the disk 6. Consequently,the generation of ground powder due to sliding between the shutter and the cartridge can be prevented and the reliability of the cartridge can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a disk cartridge, and more particularly to an improvement in its pressing mechanism.

[Conventional technology]

Conventionally, in this type of disk cartridge, a spring made of a shutter is used as a cantilever type spring to press down on the pressure plate, so as the shutter opens and closes, sliding occurs between the spring (shutter) and the cartridge. As a result, there was a drawback that abrasion powder was generated.

In addition, the cantilever type has the disadvantage that it is difficult to incorporate the shutter because it needs to be displaced (bent) in advance.

[Problem that the invention seeks to solve]

The purpose of this invention is to solve the drawbacks of the above-mentioned conventional products, such as generation of abrasion powder due to sliding between the shutter and cartridge and difficulty in assembling the shutter, and thereby provide a disk cartridge with excellent reliability. shall be.

Means for Solving Problem c] To this end, in the present invention, a part of the shutter is not a cantilever type spring, but is used as a buckling spring type spring that buckles only when the shutter is opened and presses the pressure plate. This eliminates the sliding movement between the spring and the cartridge when opening and closing the shutter, preventing the generation of abrasion powder, and also makes it easy to assemble the shutter as there is no need to bend (displace) the spring in advance.

Example C] When the disk cartridge itself is inserted into the drive, it presses the disk to provide a cleaning effect and the effect of increasing the running stability of the disk, and when it is removed from the drive,
In order to provide a mechanism that prevents deformation of the disk and re-adhesion of dirt without pressing the disk, a part of the shutter is processed to act as a spring that presses the disk through the pressure plate, but at this time the spring is buckled. It is a spring type, and when the shutter is opened, the free end of the buckling spring part is hooked on a protrusion provided on the cartridge, so that when the shutter opens, the spring buckles and presses the disk, and when the shutter closes, the spring straightens again. , so as not to press the disc.

In addition, reliability will be improved if the protrusion provided on the cartridge for supporting one end of the spring has an oblique groove so that the spring always buckles in only one direction.

1 to 6 show one embodiment thereof.

In FIGS. 1 and 2, 1 is a cartridge body, 2 is a shutter, 2a is the main body, 2b is a head window opening that matches the head window 3, and 2C is a buckling spring portion.

1 shows a state in which the shutter 2 is closed, and FIG. 2 shows a state in which the shutter 2 is opened, that is, a drive state.

3 and 4 are main part sectional views corresponding to FIGS. 1 and 2, respectively, and in the figures, 1a is a cartridge case, 1b is a protrusion provided on the cartridge body l, 4 is a pressing plate, 5 is a liner, and 6 is a disc.

In the closed state of the shutter 2 shown in FIG. 3, the buckling spring portion 2C extends horizontally and is separated from the pressing plate 4, so that the disk 6 is not pressed.

However, when the shutter 2 is open as shown in FIG. 4, the buckling spring portion 2C enters the inclined groove of the projection 1b and is buckled downward, pushing the pressing plate 4.
As a result, the disk 6 is pressed.

FIG. 5 is an enlarged view of the shutter 2, and shows the buckling spring portion 2c.
are formed by punching out a pair with the tips as free ends.

Although the protrusion 1b is shown in FIG. 6, in order to reliably buckle the buckling spring portion 2c downward, it is necessary to provide an inclined groove whose free end enters upward.

〔Effect of the invention〕

As explained above, in the present invention, since a part of the shutter is used as a buckling spring to apply a load to the pressing plate, reliability and workability are improved.

[Brief explanation of the drawing]

Fig. 1 is an external view of the disk cartridge according to the present invention showing the state in which the shutter is closed, Fig. 2 is an external view showing the state in which the shutter is open, Fig. 3 is a cross-sectional view of the main parts with the shutter closed, Figure 4 is a cross-sectional view of the main part with the shutter open, Figure 5 is an external view of the shutter, and Figure 6 is an enlarged view of the main part of a projection for supporting one end of the buckling spring provided on the cartridge. . 1...Cartridge body, 1a...Cartridge case, tb...Protrusion, 2...Shutter, 2a...
-Shutter body, 2b...opening, 2c...buckling spring part, 4...pressing plate, 5...liner, 6...
··disk. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] In a disc cartridge equipped with a pressing plate for pressing the disc and a mechanism for pressing the pressing plate using a part of the shutter as a spring, a part of the shutter is formed with a buckling spring part whose tip is a free end, and on the other hand,
The cartridge body side facing this free end is provided with a protrusion that comes into contact with the free end when the shutter is opened, and when the shutter is opened, the buckling spring part is buckled and the pressing plate is pressed. disc cartridge.