JPH04119554A - Disk device - Google Patents

Abstract

PURPOSE:To make the device thin by first abutting a disk cartridge with the side face of a first link when pushing it, simultaneously engaging the engaging part with the prescribed spot of a shutter and moving the engaging part in a direction for opening this shutter together with the pushing-in operation. CONSTITUTION:When pushing in a cartridge 4, the cartridge 4 is first abutted to the side face of a first link 11 and simultaneously, an engaging part 12 is engaged with the prescribed spot of a shutter 5. Next, when the cartridge 4 is moved in the pushing-in direction against the energizing of a torsion spring 16 inserted at a part corresponding to rotation between a second link 14 and a housing frame, the first link 11 is parallelly moved with lateral movement by guiding members 17-20 and by this parallel movement, the shutter 5 is opened through the engaging part 12. When pulling the cartridge 4 out, the first link 11 is moved reversely to the case of pushing-in, and the shutter is closed through the engaging part 12.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a device in which a disk protection shutter of a disk cartridge is opened when a disk cartridge is pushed into a storage frame for mounting, and in particular to a disk device that can be made thinner. Note that the disk device is a magnetic disk device, an optical disk device, a magneto-optical disk device, or the like.

[Conventional technology]

A conventional example will be described below with reference to the drawings. Figure 8 shows the main parts of the conventional disk cartridge and disk drive (hereinafter referred to as
Fig. 9 is a side view of the cartridge when it is inserted (simply referred to as a cartridge). Note that FIGS. 8 and 9 are common to the embodiments described below. 1 is an optical henode, 2 is a disk rotation motor, 3 is an optical disk (hereinafter simply referred to as a disk), and 4 is a disk 3
It is a cartridge that stores. In FIG. 8, the disk 3 and thus the cartridge 4 have only been inserted into the device and have not yet been attached to the motor 2. In FIG. 9, the disk 3 is mounted on the motor 2 and is closely opposed to the objective lens IA of the optical head 1.
It becomes possible to write and read data. FIG. 6 is a plan view of a conventional general cartridge when it is not installed, and FIG. 7 is a plan view of the conventional cartridge when it is installed. Note that FIGS. 6 and 7 are common to the embodiments described below. The cartridge 4 that stores the disk 3 has a shutter 5.
is provided. The shutter 5 closes when the cartridge 4 is not installed to shield the writing/reading area of the disc 3, and opens when the cartridge 4 is installed to expose the writing/reading area of the disc 3. That is, in FIG. 6, a rectangular window 6 formed in the shutter 5 and a rectangular window 7 formed in the cartridge 4 are as follows.
The shutters 5 are at different positions, and the shutters 5 are in a closed state. In FIG. 7, when the shutter 5 is opened by moving to the right against the leftward (closed) bias, the positions 6 and 7 coincide and the writing and reading locations on the disk 3 are aligned. be exposed. Note that the hub 8 is fixed to the center of the disk 3, and is attracted by the motor 2 when attached (see FIG. 9). Further, the recess 9 formed on the lower side of the cartridge 4 serves to open the shutter 5 by pushing the lower left corner of the shutter 5 to the left, as will be described in detail later. FIG. 6 corresponds to FIG. 8, and FIG. 7 corresponds to FIG. 9. FIG. 4 is a plan view of the conventional example, and FIG. 5 is a front view thereof, showing a mechanism for automatically opening and closing the shutter of the cartridge. In FIG. 4, a link 41 is rotatably supported at its right end on the front surface of the peripheral wall of the holder 10 into which the cartridge 4 is to be inserted, and is rotated clockwise by a spring 43. Forced. A pin 44 is provided upright at the left end of the link 41, and this pin 44 engages with an arcuate guide hole 45 formed in the peripheral wall of the holder 10. Therefore, when the cartridge 4 is inserted into the holder 10 downward in FIG. 4, the pin 44 fits into the recess 9 in contact with the lower left corner of the shutter 5. As the cartridge 4 moves downward, that is, is inserted into the holder IO, the link 41 rotates counterclockwise, and this rotation causes the pin 4 to
4 has a component that moves to the right. The rightward movement component of the pin 44 pushes the shutter 5 to the right and opens it. When the cartridge 4 is fully inserted, the link 41 assumes the position shown by the dashed line, and the pin 44
The position corresponds to the fully open position of the shutter 5. Thereafter, by a mechanism not shown, the holder 1-0 is moved parallel to and at right angles to the plane of the paper to move the cartridge 4 to the motor 2.
(See Figure 9). When the cartridge 4 is taken out, the link 44 is rotated clockwise by the bias of the spring 43, and the accompanying leftward movement component of the pin 44 causes the shutter 5 to rotate as follows.
It will close according to the leftward bias.

[Problem to be solved by the invention]

As described above, in the conventional technology, the link on which the cartridge shutter opening/closing pin is erected is rotatably supported on the outer side of the circumferential wall in the thickness direction of the holder. Therefore,
The dimension of the holder in the thickness direction increases, which hinders the ability to make the device thinner. An object of the present invention is to provide a disk device that can solve the problems of the conventional technology and can be made thinner.

[Means to solve the problem]

In order to solve this problem, the disk device according to claim 1 is a device in which when a disk cartridge is pushed into a storage frame for mounting, a disk protection shutter of the disk cartridge is opened in conjunction with the pushing operation. , a first member having an engaging portion at one end thereof that engages with a predetermined portion of the shutter;
a second link having one end forming a rotational pair with the other end of the first link, and the other end forming a rotational pair with a predetermined location of the storage frame; A first elongated hole in the shape of an arc, which is provided in the peripheral wall of the housing frame and whose radius is the distance between each end of the first link, is provided in the peripheral wall of the housing frame in order to restrain the housing frame so as to be able to move in parallel; a second elongate hole provided parallel to the first elongate hole; and a second elongate hole provided coaxially with the rotating pair at each end of the first link; Second
a guide means consisting of a guide pin that engages with each elongated hole; and a torsion member inserted in a rotationally coupled position of the second link and the housing frame to urge the second link in a direction opposite to the push-in direction. a spring; when the disk cartridge is pushed in, the disk cartridge first contacts the side surface of the first link, and at the same time, the engaging portion engages with a predetermined portion of the shutter, and along with the pushing operation;
The engaging portion moves in the direction of opening the shutter. The disk device according to claim 2 is the device according to claim 1, further comprising: a torsion spring inserted in a rotationally coupled position of the second link and the first link and urging the first link in a direction opposite to the direction of insertion. Equipped with The disk device according to claim 3 is a device in which, when a disk cartridge is pushed into a housing frame for mounting, a disk protection shutter of the disk cartridge is opened in conjunction with the pushing operation, wherein a part of the housing frame is opened. a parallel crank mechanism comprising: a fixed link, and a parallel moving link that faces the fixed link and has an engaging portion at one end that engages with a predetermined portion of the shutter; at least one of each rotating pair of the fixed links; a torsion spring inserted into the parallel movement link to urge the parallel movement link in a direction opposite to the pushing direction; the disc cartridge first contacts a side surface of the parallel movement link when the disk cartridge is pushed in, and at the same time the engagement The engaging portion engages with a predetermined portion of the shutter, and the engaging portion moves in the direction of opening the shutter along with the pushing operation. Each guide pin is installed in two places on the link, and the surrounding wall of the storage frame is installed.
The first guide pin engages with the first guide pin. and a second elongated hole. The disk device according to claim 5 is the device according to claim 1 or 4, wherein either the inner circumferential surface of each of the first and second elongated holes or the outer circumferential surface of the guide pin has a low friction coefficient. plastic is coated.

[Effect]

In the disk device according to the first aspect, when the disk cartridge is pushed in, the disk cartridge first contacts the side surface of the first link, and at the same time, the engaging portion thereof engages with a predetermined portion of the shutter. Next, when the disk cartridge moves in the pushing direction against the bias of a torsion spring inserted at a rotationally coupled position between the second link and the storage frame, the first link is moved in parallel with lateral movement by the guide means. , this parallel movement opens the shutter via the engaging portion. When the disk cartridge is pulled out, the first link moves in the opposite direction to when it is pushed in, and the shutter is closed via the engaging portion. In the disk device according to the second aspect of the present invention, the first link is biased in the opposite direction to the insertion direction of the disk cartridge by the torsion spring inserted at the rotationally coupled position of the first link and the first link. 1. When pushed the most. Even if the second links may take an overlapping position, the first link will not take a consideration point. In the disk device according to the third aspect of the present invention, when the disk cartridge is pushed in, the disk cartridge first comes into contact with the side surface of the parallel movement link, and at the same time, the engaging portion thereof engages with a predetermined portion of the shutter. Next, when the disk cartridge moves in the pushing direction against the bias of the torsion spring, the parallel movement link moves in parallel with a lateral movement by the parallel crank mechanism, and this parallel movement opens the shutter via the engaging portion. . When the disk cartridge is pulled out, the parallel movement link moves in the opposite direction to when it is pushed in, and the shutter is closed via the engaging portion. In the disk device according to the fourth aspect, since the first link is guided by the guide means, its movement becomes smoother. In the disk device according to claim 5, the first. Since either the inner circumferential surface of each second elongated hole or the outer circumferential surface of the guide pin is coated with a plastic having a low coefficient of friction, the friction at the engagement point between each elongated hole and the guide pin is small. Movement becomes smoother.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. In the first embodiment, all members for opening and closing the shutter of the cartridge are housed inside a holder serving as a cartridge housing frame, so that the thickness is not increased. FIG. 1 is a plan view of the first embodiment, and FIG. 2 is a front view thereof. In FIG. 1, a link 11 (first link in the invention) has a pin 12 as an engaging part for the shutter 5 on its left end, an abutting part 13 for the cartridge 4 on its upper surface, and a left end. A pin 17 is set upright. The link 14 (second link in the invention) forms a rotating pair with the lower left part of the holder IO via the shaft 15 at one end, and rotates with the right end of the link 11 via the shaft pin 18 at the other end. form a contraposition. Pin 17. The shaft pin 18 is inserted into each guide hole 19 of the holder 10.
．． 20. One guide hole 20 is formed along an arc with the axis 15 as the center and the effective length of the link 14 as a radius, and the other guide hole 19 is formed parallel to the guide hole 20 in the left direction by the effective length of the link 11. It has been moved. Further, tear springs 16 are inserted into each of the shafts 15 and 18, and these bias the links 14 counterclockwise around the shaft 15 and the links 11 clockwise around the shaft pin 18, respectively. do. The initial position of the link 14 is determined by the stopper 14A, and thus the initial position of the link 11 is also determined. By the way, since all the above members are configured to fit inside the holder 10, the thickness does not increase. Therefore, the operation of this first embodiment is as follows. When the cartridge 4 is pushed in, it first comes into contact with the contact portion 13, which is the upper surface of the link 11, and at the same time, the pin 12 engages with the lower left corner of the shutter 5. Then, when the cartridge 4 moves in the pushing direction against the bias of the torsion spring 16 inserted into the shaft 15, the link 11 moves from the dashed line position to the dashed line position with the pin 17. It is guided by the engagement between the shaft pin 18 and each corresponding guide hole 19, 20, and undergoes parallel movement with a leftward movement component. This parallel movement opens the shutter 5 via the pin 17. When the cartridge 4 is taken out, the link 11 moves in the opposite direction to when it is pushed in, and the shutter 5 closes. By the way, the torsion spring 16 inserted into the location of the shaft pin 18
The need for this is that when link 11 comes to the position indicated by the dashed line,
In other words, this is to prevent link 11 from causing a consideration point when it overlaps link 14. In other words, without the torsion spring 16, when the link 14 rotates counterclockwise at the position indicated by the dotted chain line, the link 11 would move counterclockwise around the pin 17, although it should normally move upward in parallel. This is because there is a risk that normal parallel movement may not be possible due to rotation in this direction. Therefore, by the torsion spring 16, the link 1
It is necessary to apply a clockwise rotational bias to the shaft pin 18 around the shaft pin 18. However, if the design is such that the links 11 and 14 do not overlap at the final position of the cartridge 2 4 in the closet, in other words, when there is no risk of creating a problem, a torsion spring may be installed at the shaft pin 18. 16 is not necessarily required. However, even in such a case, the torsion spring 1
6 has the effect of making the movement of the link 11 smoother and more reliable. The above configuration corresponds to the disk device according to claim 2. Also, each guide hole 19.20 or pin 17. Axis pin 18
By coating this surface with Teflon (registered trademark of DuPont), it is possible to make the engagement smoother and, in turn, to make the insertion operation of the cartridge smoother. The above configuration corresponds to the disk device according to claim 5. FIG. 3 is a plan view of the second embodiment. In this second embodiment, the link that comes into contact with the cartridge is configured as one link of a parallel crank mechanism. In FIG. 3, link 21. Link 24. The link 25 and part of the holder 10 constitute a parallel crank mechanism. Each rotational pair of the parallel crank mechanism is connected to the shaft 26. Axis 27. pin 30
and shaft 33. Each shaft 26, 27 rotatably connects the holder 10 as a fixed link and one end of each link 24,25. Pin 30 is pin 2
9 and is installed upright on a link 21 which is a parallel movement link. Also, pin 30. The axis 33 has each link 24.25
is rotatably connected to the link 21. Each pin 29.30 is guided in engagement with a respective guide hole 31.32 formed in the front side of the peripheral wall of the holder 10 in FIG. The guide hole 31 has an arc shape with the axis 26 as the center and the effective length of the link 24 as the radius, and the guide hole 32 is obtained by moving the guide hole 31 in parallel to the right by the distance between the pins 29 and 30. be. Further, a torsion spring 28 is inserted at the shaft 26 to urge the link 24 to rotate in a counterclockwise direction. Note that the torsion spring 28 may be inserted into at least one of the shafts 26 and 27. The initial position of the link 24 is determined by the stopper 34, and thus the initial position of the link 21 is also determined. By the way, since all the above members are configured to fit inside the holder 10, the thickness does not increase. The operation of the second embodiment is as follows. Cartridge 4
However, when the link 21 is pushed in, it first comes into contact with the abutting portion 23 which is the upper surface of the link 21, and at the same time, the pin 22 which is the engaging portion engages with the lower left corner of the shutter 5. Next, when the cartridge 4 moves in the pushing direction against the bias of the torsion spring 28, the link 21 moves in parallel with a rightward movement component due to the parallel crank mechanism, and this rightward movement component causes The shutter 5 is opened via the pin 22. When the cartridge 4 is taken out, the link 21 moves to the left in the opposite direction to when it is pushed in, and the shutter 4 is closed. By the way, each pin 29.30 and each guide hole 31.3
Although the guide means consisting of 2 is not necessarily necessary for the movement of the parallel crank mechanism, its presence has the effect of making the movement smoother. The above configuration corresponds to the disk device according to claim 4. Furthermore, by coating the surface of each guide hole 31, 32 or each pin 29, 30 with Teflon, as in the first embodiment, the engagement is made smoother, and the pushing operation of the cartridge is smoother. It can be done. This configuration corresponds to the disk device according to claim 5.

【Effect of the invention】

In the disk device according to any one of claims 1 to 5, the member commonly provided with an engaging portion for opening and closing the shutter, for example, the first link in claim 1.2 or 5, and the first link in claim 3,
In No. 4 or No. 5, the parallel movement link is located inside the storage frame of the disk cartridge, so unlike the conventional example where it is located outside, the dimension in the thickness direction does not increase. Therefore, the device can be made thinner. The disk device according to claim 1.2 has the advantage that the number of parts can be reduced, especially since the parallel movement of the first link is restrained based on the engagement between the elongated hole and the guide pin. In the disk device according to claim 2, in particular, even if the first and second links take an overlapping position when the disk is pushed in the farthest, the first link does not take the position. The movement is restrained to ensure smooth ejection of the disk cartridge. In the disk device according to claim 3.4, since the parallel movement of the parallel movement link is based on a parallel crank mechanism connected by four rotating pairs, the structure is simple and the movement is smooth. There is an advantage. In the disk device according to the fourth aspect, since the first link is guided by the guide means, there is an advantage that the movement thereof becomes smoother. In the disk device according to the fifth aspect, the friction at the engagement portion between each elongated hole and the guide pin is particularly small, and the engagement operation becomes smooth, so that the reliability of the device can be improved and the life of the device can be extended.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a first embodiment according to the present invention, FIG. 2 is a front view thereof, FIG. 3 is a plan view of a second embodiment according to the present invention, and FIG. 4 is a plan view of a conventional example. , Figure 5 is the front view, Figure 6 is the plan view when the cartridge is not installed, and Figure 7 is the front view.
8 is a side view of the main part of the conventional example when the cartridge is inserted, and FIG. 9 is a side view of the cartridge when it is installed. Symbol explanation 1: Optical head, 2: Motor, 3: Disk, 4: Cartridge, 5: Shutter, 6, 7: Window, 8: Hub, 9:
Recessed portion, 10: Holder, 11.14: Link, 12: Pin, 13: Contact portion, 15: Shaft, 16: Torsion spring, 17: Pin, 18: Shaft pin, 19.20 Ni guide hole, 21.24, 25: Link, 22: Pin, 23: Contact portion, 26, 27, 33: Shaft, 28: Torsion spring, 29.30
: Pin, 31.32 Ni guide hole. Takuzu

Claims (1)

[Scope of Claims] 1) In a device in which, when a disc cartridge is pushed into a storage frame for mounting, a disc protection shutter of the disc cartridge is opened in conjunction with the pushing operation, the shutter is connected to a predetermined location. a first link having an engaging portion at one end; one end forming a rotational pair with the other end of the first link; and a second link having the other end forming a rotational pair with a predetermined location of the storage frame. a link that is provided on the peripheral wall of the housing frame in order to restrain the first link so as to be able to move in parallel; an arc shaped link whose center is the other end of the first link and whose radius is the distance between each end of the first link; a first elongated hole, a second elongated hole provided parallel to the first elongated hole, and a second elongated hole provided coaxially with the rotating pair at each end of the first link; a guide means consisting of a guide pin that engages with each of the second elongated holes; the guide means being inserted into a rotationally coupled position of the second link and the housing frame, and biasing the second link in a direction opposite to the insertion direction; and a torsion spring that causes the disk cartridge to first contact the side surface of the first link when being pushed in, and at the same time, its engaging portion engages with a predetermined portion of the shutter, and along with the pushing operation,
A disk device characterized in that the engaging portion moves in a direction in which the shutter is opened. 2) The device according to claim 1, wherein the second link and the first
A disk device characterized by comprising a torsion spring inserted in a rotationally coupled position with the link and biasing the first link in a direction opposite to insertion. 3) In a device in which a disk protection shutter of a disk cartridge is opened in conjunction with the pushing operation when a disk cartridge is pushed into a housing frame for mounting, a fixed link forming a part of the housing frame;
a parallel crank mechanism including a parallel movement link facing the fixed link and having at one end an engagement portion with a predetermined portion of the shutter; a torsion spring that biases the translation link in a direction opposite to the pushing direction; the disc cartridge first comes into contact with a side surface of the translation link when the disc cartridge is pushed in, and at the same time, the engaging portion is pushed into a predetermined position of the shutter. A disk device characterized in that the engaging portion is configured to engage with a portion and move in a direction to open the shutter along with a pushing operation. 4) A device according to claim 3, in which the two on the fixed link
1. A disk device comprising a guide means comprising guide pins erected at locations and first and second elongated holes provided in a peripheral wall of a housing frame and engaged by the guide pins. 5) The device according to claim 1 or 4, wherein either the inner circumferential surface of each of the first and second elongated holes or the outer circumferential surface of the guide pin is coated with a plastic having a low coefficient of friction. A disk device characterized by: