JPH03142766A - Door mechanism for disk cartridge - Google Patents

Abstract

PURPOSE:To prevent a magnetic disk from being stained with generated dust by composing the shutter door of a cartridge of a rectangular tin plate, which can be freely bent, sliding the door in a longitudinal direction along the vicinity of the outer edge of a cartridge case and opening / closing the door. CONSTITUTION:The shutter door 7 of a cartridge 16 is composed of the rectangular thin plate, which can be freely bent, so as to be slid in the longitudinal direction along the vicinity of the outer edge of the cartridge case and opened / closed. In such a case, the shutter door 7 is arranged at a position different from a space to house the magnetic disk in the cartridge 16, namely, arranged so as to surround the outside of the magnetic disk and further since the door is formed in the shape of the thin plate to be freely bent, the door can be flexibly moved in a narrow space. Thus, the magnetic disk can be prevented from being stained by the generated dust.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cartridge shutter door mechanism in a cartridge type disk drive device.

(Prior Art) A conventional disk cartridge is constructed as shown in FIG. 9, for example. Reference numeral 1 denotes a cartridge case, which houses a magnetic disk 2.

3 is a shutter door, which opens and closes by rotating in the direction of the arrow. That is, when the cartridge is inserted into the drive main body, a lever attached to the drive main body pushes the knob 3a of the shutter door 3 to open the door. When the cartridge is pulled out, the door 3 is automatically closed by the force of the return spring 4.

(Problem to be solved by the invention) However, the shutter door mechanism with such a configuration,
There were the following problems.

■ The shutter door 3 and return spring 4 are housed in the cartridge case in the same space as the magnetic disk, and if the cartridge is inserted and removed repeatedly, these parts will rub against each other or the inside of the case, generating dust. , so the magnetic disk becomes contaminated.

- Since the shutter door 3 is easily opened by pressing the doorknob 3a with a finger, there is a possibility that the user may touch the magnetic disk.

The present invention solves the above-mentioned problems of the prior art by removing the shutter door from the same space as the magnetic disk, thus eliminating contamination of the magnetic disk by dust as in the conventional case, and Latch the door 1
To provide a door mechanism for a disk cartridge that does not easily open manually and further eliminates the need for an expensive torsion spring to reduce costs.

(Means for Solving the Problems) In order to achieve the above object, the disk cartridge door mechanism of the present invention first comprises a shutter door of the cartridge made of a rectangular thin plate that is bendable, and a door mechanism that extends along the vicinity of the outer edge of the cartridge case. so that it can be opened and closed by sliding it in its longitudinal direction.

Further, a slider is provided at the end of the shutter door, and this slider has a first hook portion that is hooked on a claw provided on the receiver when the cartridge is inserted into the disk drive device main body, and a first hook portion that is hooked on the claw provided on the receiver when the cartridge is inserted into the disk drive device main body. and a second hook portion that catches the wind.

Further, the portion of the slider having the second hook portion is formed of a leaf spring member, and the leaf spring member is displaced toward the center of the cartridge with respect to the first hook portion, while
The cartridge case corresponds to the starting end of the straight part of the guide groove, which consists of an arc part and a straight part on which the shutter door slides.
A latch part consisting of a recess is provided when the shutter door is closed.

The plate spring member of the slider is latched by the latch portion.

(Function) According to this configuration, first, the shutter door is located at a position different from the space in which the magnetic disk of the cartridge is stored, that is,
It is arranged so as to surround the outside of the magnetic disk, and since it has a bendable thin plate shape, it can move flexibly in a narrow space. Additionally, when a cartridge is inserted or removed, the door opens and closes when the hook provided on the slider of the shutter door catches the receiver claw, eliminating the need for a conventional return spring, eliminating dust generation, and reducing costs at the same time. be able to. moreover.

Since the leaf spring member of the slider is latched to the latch portion when the shutter door is closed, it is possible to prevent the shutter door from being easily opened by hand.

(Example) Hereinafter, embodiments will be described in detail with reference to the drawings.

FIG. 1 shows the configuration of a disc cartridge equipped with a door mechanism according to an embodiment of the present invention, in which 1 is a lower case, 2 is an upper case, 3 is an armature hub, 4 is a disc protector, and 5 is a disc cartridge. A magnetic disk, 6 a clamp plate, 7 a shutter door of the present invention, 8 a slider, 9a, 9
b is an amateur clamp, 10 is a guide groove, lla, l
lb is a torsion coil spring, 12 is a write protect plug, 13 is a filter, 14 is a circulation filter, and 15 is an air duct cover.

In the lower case 1 and the upper case 2, a guide groove 10 consisting of an arcuate part and a straight part is provided on the outside of the magnetic disk storage part, and the shutter door 7 fits into this guide groove 10. The shutter door 7 is made of a bendable rectangular thin plate, for example, polyacetal with a thickness of about 0.5 m.
Arc portion of guide groove 10.

Slides along a straight section. For shutter door 7.

A slider 8 is attached to its terminal end, so that the slider 8 slides only on the straight portion of the guide groove 10.

As shown in FIG. 2, the cartridge 16 is installed in the disk drive device main body 17, but at that time, the cartridge insertion slot 21 of the front bezel 20 of the device main body 17 is inserted.
It is loaded into the receiver 18 through it and pulled out.

At this time, a hook provided on the slider 8 is hooked on the claw 19 of the receiver 18 to open and close the shutter door 7.

As shown in FIG. 3, the slider 8
2 and a second hook part 23, and when inserting the cartridge 16 into the apparatus main body 17, the claw 19 is attached to the first hook part 2.
2, the shutter door 7 moves toward the straight section along the guide groove 10, and is therefore loaded with the shutter door 7 open. on the other hand.

When the cartridge is pulled out, the claw 19 is hooked on the second hook 23, so the shutter door 7 moves from the straight part to the arcuate part, and as a result, the shutter door 7 is taken out in a closed state.

Here, as shown in FIG. 4, the part of the slider 8 having the second hook part 23 is composed of a leaf spring member 25, and in the normal state, the part of the slider 8 that has the second hook part 23 is ,
In other words, it is displaced toward the center of the cartridge. On the other hand, as shown in FIG.
4 is provided. Therefore, as shown in Figure 5(a),
With the shutter door 7 closed, the leaf spring member 25 of the slider 8 falls into the latch portion 24 and is latched. Fifth
Figure (b) shows a state in which the shutter door 7 is slightly opened, and at this time, the plate spring member 25 of the slider 8 is pulled out from the latch portion 24 against the spring force.

As described above, by providing the latch portion, the leaf spring member 25 of the slider 8 is latched when the shutter door 7 is in the closed state, and the latch release force can be adjusted by appropriately selecting the material and plate thickness of the spring member. If set arbitrarily, it is possible to prevent the shutter door from being easily opened manually.

Although it is possible to attach a latch mechanism to the conventional configuration, since the means for closing the shutter door is the spring force of the return spring, if the spring force is too strong for latching, the operability will deteriorate significantly. become,
In the end, the spring force could not be strengthened, so it had to be opened with one's fingers.

FIG. 6 shows another embodiment of the slider 8, in which cut grooves 26 are formed on both sides of the hook portion 23 of the leaf spring member 25 to form tongue pieces 27. By configuring the hook portion 23 to be freely set relative to the leaf spring member 25 in this way, the dimension a in FIG. 6(b)
(the dimension where the hooks 22 and 23 overlap in the horizontal direction) can be minimized, and one dimension b (the difference in height between the hooks 22 and 23) can be made relatively large. In other words, when opening the shutter door 7, make the dimension a as small as possible so that the claw 19 does not come into strong contact with the hook 23, and conversely, when closing the shutter door 7, make the dimension a as small as possible so that the claw 19 does not come into strong contact with the hook 23. This is because it is desirable to make the size of the chair large so that it can be hung by its width.

FIG. 7 shows still another embodiment of the slider 8, in which cut grooves 2 are formed on both sides of the hook 23 in the leaf spring member 25.
6 is provided with a wire spring 28 that presses the tongue piece 27 having the hook portion 23 downward. Since the slider 8 is generally made by molding plastic, for example, if the cartridge is left for a long time while being loaded into the main body of the disk drive device, the tongue piece 27 portion will also be left distorted for a long time, causing creep. This happens and the tongue does not return to its original position completely even when the shutter door is closed.Therefore, wire spring 2
8 can compensate for that resilience.

FIG. 8 shows still another embodiment of the slider 8, in which the portion of the slider supporting the leaf spring member 25, that is,
The back surface of both side portions of the hook portion 22 is chamfered with a dimension d. In this case as well, the problem of deformation due to creep is corrected.

In other words, in the initial state, if there is a clearance of dimension C between the tip of the claw 19 and the hook 23, and if the tongue piece 27 is deformed upward by a dimension C or more due to creep, then when the cartridge is removed from the drive device main body, A catch will occur. Therefore, if chamfering is performed as shown in FIG. 8, deformation due to creep will be allowed up to the dimension c+d.

Incidentally, if the configurations shown in FIGS. 7 and 8 are simultaneously applied to the slider 8 shown in FIG. 6, more stable operation can be expected.

(Effects of the Invention) As explained above, according to the present invention, (1) the shutter door is arranged so as to surround the outside of the magnetic disk of the cartridge, and has a bendable thin plate shape, so that it can be slid flexibly in a narrow space; can do.

■ When a cartridge is inserted or removed, the hook on the slider of the shutter door catches the receiver claw and the door opens and closes automatically, eliminating the need for a conventional return spring, eliminating dust generation, and contaminating the magnetic disk. It can be prevented.

■ Expensive torsion springs can be omitted and costs can be reduced.

- Since the leaf spring member of the slider is latched to the latch portion when the shutter door is closed, the shutter door cannot be easily opened manually, and the magnetic disk is no longer contaminated by touching it.

It has the following effects.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing the structure of a disk cartridge provided with a door mechanism according to an embodiment of the present invention, FIG. 2 is a perspective view showing the relationship between the cartridge and the main body of the disk drive device, and FIG. The figure is a perspective view of a slider provided on the shutter door, FIG. 4 is a configuration diagram of the slider, and FIG. 5 is a sectional view showing the relationship and operation of the slider and the latch part.
6 to 8 are diagrams showing the structure of sliders of other embodiments of the present invention, and FIG. 9 is a diagram showing the structure of a conventional cartridge. 5...Magnetic disk, 7...Shutter door. 8...Slider, 10...Guide groove, 16...
Cartridge, 17... Drive device main body, 8 Receiver, 9 Claw, 2 First hook portion, 3 Second hook portion, 4 Foot portion, 5 Leaf spring member, 7 Tongue piece.

Claims (3)

[Claims] (1) In a cartridge type disk drive device,
A door mechanism for a disc cartridge, characterized in that a shutter door (7) of a cartridge (16) is made of a rectangular thin plate that is bendable and is opened and closed by sliding in the longitudinal direction along the vicinity of the outer edge of the cartridge case. (2) A slider (8) is provided at the end of the shutter door (7), and this slider is attached to the claw (1) provided on the receiver (18) when inserting the cartridge into the disk drive device.
9), and the first hook (22) that is hooked on the claw (1) when the cartridge is pulled out from the disk drive device.
9). The disk cartridge door mechanism according to claim 1, further comprising a second hook portion (23) that is hooked on the door mechanism. (3) The portion of the slider having the second hook portion (23) is made of a leaf spring member (25), and the leaf spring member (25)
5) is displaced toward the center of the cartridge with respect to the first hook part (22), and on the other hand, the straight line of the guide groove (10) consisting of an arc part and a straight part on which the shutter door (7) slides. The cartridge case corresponding to the starting end is provided with a latch part (24) consisting of a recessed part, and the leaf spring member (25) of the slider is latched to the latch part (24) when the shutter door is closed. A door mechanism for a disk cartridge according to claim 2, characterized in that: