JPH1040626A - Shutter opening/closing mechanism for disk cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce resistance to insertion by forming a slot section and others, the end surface of a sliding part being exposed thereto, in a shutter to be slid in a horizontal direction orthogonal to a cartridge inserting direction with respect to the sliding part of a cartridge main body. SOLUTION: A cylindrical body 38 includes two rollers 43 and 44 rotated in a supporting shaft 37 independently of each other, and these rollers 43 and 44 are located in both sides sandwiching turning arms 34 and 35. A cartridge 1 is inserted into a cartridge holder 14, the roller 43 is abutted on side part 40a of a slider 40 and prevented from being slid in contact with an end surface 42. The roller 44 is slid in contact with the end surface 42 and is not abutted on the side part 40a of the slider 40. The turning arm 34 is turned by the insertion of a disk cartridge and, by its turning force, a shutter 2 is opened against an energizing spring force. In this case, one selected from the rollers 43 and 44 acts to contribute to the opening/closing of the shutter and insertion resistance to a disk drive device is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk drive device for rotating a disk cartridge containing a disk-shaped recording medium such as a magneto-optical disk, and more particularly, to a disk drive device for the disk drive device. The present invention relates to a disk cartridge shutter opening / closing mechanism capable of reducing insertion resistance.

[0002]

2. Description of the Related Art A disk drive apparatus using a disk cartridge storing a disk-shaped recording medium such as a magneto-optical disk has been known. There are various types of disk cartridges, and FIG. 1 shows an example of the disk cartridge 1. The disk cartridge 1 has a shutter 2, a head access window 3, a motor access window 4, and will be described later. An engagement recess 1A or the like that engages with the cartridge hook is provided. The shutter 2 is provided with a shutter opening / closing slot 5. The shutter 2 is urged by a spring (not shown) in a direction (arrow A 'direction) to close the head access window 3. For example, a magneto-optical disk 6 shown in FIG. 2 is housed in the disk cartridge 1. The magneto-optical disk 6 includes a hub 7 mounted on a turntable of a spindle motor (not shown) and a disk-shaped magneto-optical disk substrate 8. It consists of The disk-shaped magneto-optical disk substrate 8 has an A surface and a B surface.

As shown in FIG. 3, the disk drive has a loading mechanism. The loading mechanism includes a base unit 11, a fixed cam plate 12 fixed on the base unit 11, and slides in the directions of arrows A1 and A2. It is roughly constituted by a movable slide cam plate 13 and a cartridge holder 14 which holds a disk cartridge and can reciprocate in directions of arrows A1 and A2 and arrows D1 and D2. The dotted cam portion in the base unit 11
A drive unit 15 for driving the motor 3 is provided (FIG. 4).
The drive unit 15 includes a drive motor 16, a worm gear 18 fixed to an output shaft 17 thereof, a worm wheel 19 meshed with the drive motor 16, an intermediate gear train 20, and a pinion 2.
1. A rack 22 is fixed to a bottom plate 13 ′ of the sliding cam plate 13 by screws 23, and the pinion 21 is engaged with the rack 22.

The sliding cam plate 13 is provided with a cam groove 25 in a side plate 24 thereof. A cam follower 26 is provided on the outer surface of the cartridge holder 14. A guide groove 28 is formed in the side plate 27 of the fixed cam plate 12. The guide groove 28 is substantially L-shaped, and includes a horizontal groove 28a extending in the insertion direction of the disk cartridge 1 and a vertical groove 28b extending in the vertical direction. The cam follower 26 is slidably fitted in the cam groove 25 and the guide groove 28. The fixed cam plate 12 is provided with a guide protrusion 29, and the sliding cam plate 13 is provided with a guide groove 30.
The sliding cam plate 13 slides on the fixed cam plate 12 while being guided by the guide projection 29.

The detailed configuration of the cartridge holder 14 will be described later. Assuming that the disk cartridge 1 is already mounted on the cartridge holder 14 and the sliding cam plate 13 moves forward in the direction A1, the cam follower 26 tilts. While being pushed by the cam wall of the cam groove 25b, it is moved forward in the direction of the arrow A1 along the horizontal groove 28a,
When the cam follower 26 reaches the end of the horizontal groove 28a in the A1 direction, while being pushed by the cam wall of the inclined cam groove 25b,
It descends vertically in the direction of arrow D1 along the vertical groove 28b, and is positioned at the lower end of the vertical groove 28b by the bottom cam groove 25c. As a result, the disk cartridge 1 is set at the load position where writing and reading are possible.

When the sliding cam plate 13 moves backward in the direction of arrow A2, the cam follower 26 is vertically pushed in the direction of arrow D2 along the vertical groove 28b while being pushed by the cam wall of the inclined cam groove 25b. When reaching the upper end of the vertical groove 28b, it is pushed by the cam wall of the inclined cam groove 25b,
The cam follower 26 moves in the direction of arrow A2 along the horizontal groove 28a, reaches the end of the horizontal groove 28a in the direction A2, and becomes an unloading position (discharge position) where the disc cartridge 1 projects a predetermined amount from the insertion slot.

On both lateral sides of the cartridge holder 14, locking pieces 30 'for mounting the disk cartridge 1 are provided as shown in FIGS. 5A and 5B in an enlarged manner. The upper plate 31 of the cartridge holder 14 is provided with an opening 32 for setting a magnetic generator (not shown). A pair of support shafts 3 are provided at the back corner of the cartridge holder 14.
3 and 33 are provided. A pair of synthetic resin cartridge hooks 14A are provided near the support shafts 33, 33. The cartridge hook 14A has elasticity and can be engaged with the engagement recess 1A of the disk cartridge 1.

The pivot shafts 33, 33 are provided with a rotating arm 3 which constitutes a part of a shutter opening / closing mechanism of the disk cartridge.
4 and 35 are pivotally supported. A guide pin 36 projects from an intermediate portion between the rotating arms 34 and 35. The guide pins 36 are fitted in arcuate guide grooves 37 formed in the upper plate 31. The rotating arms 34 and 35 are curved in a U-shape, and a support shaft 37 is provided at a tip portion thereof. A column 38 is rotatably provided on the support shaft 37. The cylindrical body 38 is mounted on the rotating arms 34 and 35 such that one of the cylindrical bodies 38 engages with the shutter opening / closing slot 5 when the disk cartridge 1 is inserted into the cartridge holder 14 and the other slides on the front surface of the shutter 2. The height from the plate 31 is made different, so that when the A side is inserted upward, the corresponding cylindrical body 38 is inserted.
Engages with the shutter opening / closing slot 5, and when the B-side is inserted upward, the corresponding cylindrical body 38 is engaged with the shutter opening / closing slot 5.

When the disc cartridge 1 is inserted into the cartridge holder 14 from the direction indicated by the arrow in FIG. 5A, the rotating arms 34 and 35 are moved to the arrows E1 and E2, respectively.
5B, the disc cartridge 1 is inserted into the inner side of the cartridge holder 14 and the cartridge ridge hook 14A engages with the engaging recess 1A, and the cartridge holder 14 and the disc are inserted. The cartridge 2 is integrated with the cartridge 1, the shutter 2 is completely opened, the driving motor 16 is driven by a sensor (not shown), and loading is started. The rotating arms 34 and 35 are urged in a return direction by a rotating urging spring (torsion spring) (not shown), and the tip of the cartridge hook 14A is shaped so that the disk cartridge 1 can be removed. .

[0010]

The shutter 2 has an integral structure of a metal cover plate 39 and a slider 40, as shown in FIG. 6 to FIG.
The cartridge main body 41 is provided with a sliding portion of the slider 40, and an end surface 42 of the sliding portion is exposed to the shutter opening / closing slot portion 5. The slider 40 is slidably held by a cartridge body 41, and a conventional shutter opening / closing mechanism is such that a cylindrical body 38 is
The shutter 2 is opened while pressing the slider 40 in the lateral direction while moving along the end face 42 of the first shutter 42. The details of the mechanism are as described below.

Assuming now that the disk cartridge 1 is inserted into the cartridge holder 14 with the side B facing upward, as shown in FIG. 9A, the rotating arm 34 is moved from the shutter closed position to the shutter open position. Angle θ
When the shutter cartridge 2 is rotated only by this distance, the shutter 2 is displaced in the horizontal direction orthogonal to the insertion direction by the stroke L. The force for pushing the shutter 2 in the horizontal direction is, as shown in FIG. The insertion force is F1, and the turning power of the rotating arm 34 generated based on the insertion force F1 is F2.
Then, the lateral component F3 of the rotational power F2 is obtained. F4 is a force for pushing the support shaft 33 of the rotating arm 34.

The cylindrical body 38 is rotated in a direction indicated by an arrow shown in FIG. 6 with the support shaft 37 as a fulcrum due to the frictional force of the end face 42 acting on the peripheral surface 38a and the displacement accompanying the rotation of the rotary arm 34. However, since a lateral component force F3 is applied to the local portion 38b of the peripheral surface 38a that contacts the side portion 40a of the slider 40 of the cylindrical body 38, the side portion 40a and the local portion 38b are based on the lateral component force F3. The frictional force generated between the cylindrical member 38 acts as a force that hinders the rotation of the cylindrical member 38. Therefore, a slip occurs between the peripheral surface 38a of the cylindrical member 38 and the end surface 42, and the insertion of the disk cartridge 1 becomes heavy. In addition, cylindrical body 3
8 and the end face 42 are easily worn. Further, there is a disadvantage that the opening of the shutter 2 is not performed smoothly.

Therefore, it is conceivable to devise the shapes, dimensions, and the like of the rotating arms 34 and 35, but the general specifications of the disk drive device are fixed. The position is also determined by the standard, and the degree of freedom in designing the size and shape of the disk drive device is small.
However, the conventional shutter opening / closing mechanism is designed so that the disc cartridge 1 of a product of a certain company can be smoothly inserted into the cartridge holder 14 even if the conventional shutter opening / closing mechanism is designed so that it cannot be used. The problem of inserting a disk cartridge is heavy, that is, inserting a certain type of disk cartridge is light,
There is a problem that insertion of other types of disk cartridges is heavy.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a disk cartridge capable of reducing insertion resistance of various types of disk cartridges into a disk drive as much as possible. To provide a shutter opening and closing mechanism.

[0015]

According to a first aspect of the present invention, a shutter opening / closing mechanism for a disk cartridge includes a shutter slidable in a horizontal direction perpendicular to a cartridge insertion direction with respect to a sliding portion of a cartridge body. A rotating arm formed with a slot where an end surface of the sliding portion is exposed and rotated based on a rotating force generated by insertion of a disk cartridge reciprocated between an unloading position and a loading position; A cylindrical body engaged with a slot for opening and closing the shutter of the disk cartridge is rotatably supported at the tip of the rotating arm, and the cylindrical body moves the shutter in a horizontal direction based on a horizontal component of the rotating power. To be opened by pressing
The cylindrical body is composed of a plurality of rollers divided in the axial direction, and the plurality of rollers are rotatable independently of each other. The disk cartridge shutter opening / closing mechanism according to claim 2 of the present invention is the disk cartridge shutter opening / closing mechanism according to claim 1, wherein the number of the rollers is two, and the rollers are on both sides of a plate of the rotating arm. It is provided in. According to a third aspect of the present invention, there is provided a disk cartridge shutter opening / closing mechanism.
, One of the rollers is in contact with the shutter, and the other of the rollers is in sliding contact with the end surface. According to a fourth aspect of the present invention, in the disk cartridge shutter opening / closing mechanism according to the third aspect, the shutter has a slider, and one of the rollers is in contact with the slider. And

[0016]

FIG. 10 shows a cylinder 3 according to the present invention.
Embodiment 8 is shown, and the cylindrical body 38 here is
It is composed of two rollers 43,44. The rollers 43 and 44 are rotatably supported on the support shaft 37 independently of each other. The rollers 43 and 44 are provided on both sides of the rotation arms 34 and 35 here. In FIG. 10, as shown in FIG. 10A, a disc cartridge 1 (a general popular product) manufactured by a certain company is inserted into the cartridge holder 14, and a roller 43 is provided.
Is the side portion 4 of the slider 40 as shown in (b) and (c).
0, and the roller 43 is not in sliding contact with the end face 42. The roller 44 is in sliding contact with the end surface 42 and the slider 4
0 is not in contact with the side portion 40a. In FIGS. 10A to 10C, reference numeral 40b denotes an inclined surface of the slider 40.

FIGS. 11A and 11B are explanatory views for explaining the operation of the rollers 43 and 44. FIG. 11A shows the attitude of the rotating arm 34 with respect to the shutter opening / closing slot 5 when the shutter is closed. The angle formed between the rotation arm 34 and a direction orthogonal to the direction G1 is θc.
(B) shows the attitude of the rotating arm 34 with respect to the shutter opening / closing slot portion 5 when the shutter is opened. The angle formed between the direction perpendicular to the insertion direction G1 and the rotating arm 34 is θ0, and the shutter 2 is During the movement from the fully closed position to the fully open position, the rotation arm 34 changes its attitude with respect to the disc cartridge 1 by Δθ = θ0−θc, that is, more precisely, the plurality of rollers 43, 4
4 is designed so that the posture changes with respect to the central axis.

In FIG. 11A, when the disc cartridge 1 is pushed while being inserted in the direction of arrow G1, the insertion arm F is rotated by the insertion force F1, and the rotation arm 34 is rotated.
Starts rotating, the local portion 43b of the peripheral surface 43a of the roller 43 contacting the side portion 40a of the slider 40 is
0a, and the shutter 2 starts to be opened against the biasing force of a biasing spring (not shown) due to the lateral component F3 of the rotating power F2. With the rotation of the rotation arm 34, the roller 43 starts to rotate relative to the support shaft 37 in the direction of the arrow M1, and the rotation arm 34 is displaced from the posture at the shutter closed position to the posture at the shutter open position. In the meantime, the roller 43 rotates relative to the rotation arm 34 about the support shaft 37 by an angle △ θ, but the local portion 43b of the split roller 43 remains in contact with the side portion 40a, and the roller 43 is No relative rotation with respect to 40. On the other hand, the roller 44 uses the support shaft 37 as a fulcrum by the frictional force of the end face 42 acting on the peripheral surface 44a and the displacement caused by the rotation of the rotation arm 34 as shown in FIG. (The same direction as the rotation direction of the roller 43). As described above, two rollers are shared so that one of the rollers 43 and 44 functions as a roller that opens and closes the shutter 2 and the other functions as a roller that slides along the end surface 42. The insertion resistance to the drive device can be reduced.

FIG. 12 is an explanatory view showing a case where another type of disc cartridge 1 is inserted into the cartridge holder 14. In the case of this disc cartridge 1, the roller 4
3A, the local portion 43b of the peripheral surface 43a contacts the side portion 40a of the slider 40 as shown in FIG. 3A, and the local portion 43c of the peripheral surface 43a contacts the bottom portion 40c of the slider 40 as shown in FIG. Touched. The peripheral surface 44 a of the roller 44 is in a non-contact state with the side portion 40 a of the slider 40 and is in a non-sliding state in which the roller 44 floats from the end surface 42. When the disk cartridge 1 is inserted, only the roller 43 rotates the relative rotation with respect to the support shaft 37 and pushes the slider 40 laterally to open the shutter 1.
In this case, the roller 44 does not rotate and does not contribute to the opening of the shutter 2.

FIG. 13 is an explanatory view showing a case where another type of disc cartridge 1 is inserted into the cartridge holder 14. In the case of this disc cartridge 1, FIG.
As shown in (b), the local portion 43b of the roller 43 is in contact with the side portion 39a of the metal cover plate 39, and as shown in (b), the peripheral surface 44a of the roller 44 is in contact. The local portion 43c of the roller 43 is in a non-sliding state floating from the bottom portion 40b of the slider 40.
4 is in a state of sliding contact with the end surface 42.

When the disk cartridge 1 is inserted, the roller 43 pushes the metal cover plate 39 in the lateral direction while rotating relative to the support shaft 37, and the roller 44 rotates while sliding on the end surface 42 and simultaneously rotates the metal cover plate. Board 39
In the lateral direction, in which case the rollers 43,
The shutter 2 is opened by the lateral component force F3 of 44. Note that the local portion 43a is a side portion 39a of the metal cover plate 39.
, The roller 43 does not rotate relative to the metal cover plate 39, while the roller 44
The whole 4a is relatively rotated while slidingly contacting the metal covering plate 39. In this case, although the insertion resistance of the disk cartridge 1 cannot be reduced, the disk cartridge 1 can be inserted as before.

FIG. 14 is an explanatory view showing a case where another type of disc cartridge 1 is inserted into the cartridge holder 14. In the case of this disc cartridge 1, FIG.
As shown in FIG. 5, the local portion 43b of the roller 43 is in contact with the side portion 40a of the slider 40, and the peripheral surface 44a of the roller 44 is in contact. Local part 43 of roller 43
c and the peripheral surface 44a of the roller 44 are in sliding contact with the end surface 42 of the sliding portion. In this case, when the disk cartridge 1 is inserted, the roller 43 pushes the slider 40 in the lateral direction while rotating relatively to the support shaft 37, and the roller 44 rotates about the support shaft 37 independently of the roller 43 while rotating. By pressing 40, shutter 2
Is opened. Also in this case, the disc cartridge 1
Although the insertion resistance cannot be reduced, the disk cartridge 1 can be inserted as in the related art.

FIGS. 15A and 15B show a modification of the cylindrical body 38 according to the present invention. FIG. 15A shows a configuration in which rollers 43 and 44 are constituted by ball bearings. Denotes a ball, and 47 denotes an outer cylinder that is rotatable relative to the inner cylinder 45 via the ball 46. (b)
Are provided with annular sliding contact portions 48, 49 at the bottoms of the rollers 43, 44 and rotatably supported on the support shaft 37 by a washer 50. The number and shape of the rollers 43, 44 are not limited to this. Absent.

[0024]

The shutter opening / closing mechanism for a disk cartridge according to the present invention is constructed as described above. Therefore, it is possible to reduce the insertion resistance of various types of disk cartridges into the disk drive as much as possible. Play.

[Brief description of the drawings]

FIG. 1 is an external view showing an example of a disk cartridge.

FIG. 2 is a perspective view showing an example of a magneto-optical disk.

FIG. 3 is an exploded perspective view illustrating an example of a loading mechanism of the disk drive device.

FIG. 4 is a plan view showing a relationship between a drive unit of the disk drive device and a rack.

5A and 5B are plan views of the cartridge holder shown in FIG. 3 as viewed from the back side, wherein FIG. 5A shows a state before the cartridge is inserted, and FIG. 5B shows a state after the cartridge is inserted.

FIG. 6 is a plan view showing an engagement state between a rotating arm and a shutter opening / closing slot.

FIG. 7 is a partial cross-sectional view showing an engagement state between a rotating arm and a shutter opening / closing slot.

FIG. 8 is a front view showing an engagement state between a rotating arm and a shutter opening / closing slot.

FIGS. 9A and 9B are explanatory diagrams for explaining the operation of the rotating arm, wherein FIG. 9A is a rotation angle of the rotating arm which is rotated while the shutter moves from the shutter closed position to the shutter opened position; FIG. 7B is a diagram for explaining a lateral component force generated with the turning force of the rotating arm.

10A and 10B are diagrams illustrating an example of a shutter opening / closing mechanism according to the present invention, wherein FIG. 10A is a plan view illustrating an engagement state between a roller and a shutter opening / closing slot, and FIG. FIG. 4C is a partial cross-sectional view showing an engaged state with the roller, and FIG. 4C is a front view showing an engaged state between the roller and the shutter opening / closing slot.

11A and 11B are diagrams illustrating an example of a shutter opening / closing mechanism according to the present invention, wherein FIG. 11A is an explanatory diagram for explaining an operation of a roller, and FIG. 11A is a rotation arm when the shutter is closed. The attitude of the disk cartridge relative to the
FIG. 6B is a diagram illustrating a posture of the rotating arm with respect to the disk cartridge when the shutter is opened.

12A and 12B are diagrams for explaining a relationship between a shutter opening / closing mechanism according to the present invention and another type of disc cartridge, wherein FIG. 12A is a plan view showing an engagement state between a roller and a shutter opening / closing slot portion; FIG. 4B is a partial cross-sectional view showing an engagement state between the roller and the shutter opening / closing slot.

13A and 13B are diagrams for explaining a relationship between a shutter opening / closing mechanism according to the present invention and a still another type of disc cartridge, and FIG. 13A illustrates an engagement state between a roller and a shutter opening / closing slot. FIG. 4B is a partial cross-sectional view illustrating an engagement state between a roller and a shutter opening / closing slot.

14A and 14B are diagrams for explaining the relationship between a shutter opening / closing mechanism according to the present invention and still another type of disc cartridge, and FIG. 14A illustrates an engagement state between a roller and a shutter opening / closing slot. FIG. 4B is a partial cross-sectional view illustrating an engagement state between a roller and a shutter opening / closing slot.

15A and 15B are diagrams showing a modified example of the roller according to the present invention, wherein FIG. 15A shows a case where the roller is constituted by a ball bearing, and FIG. 15B shows an example in which an annular sliding contact portion is provided. .

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Disc cartridge 2 ... Shutter 5 ... Shutter opening / closing slot part 34, 35 ... Rotating arm 41 ... Cartridge main body 42 ... End face F2 ... Rotating power F3 ... Lateral component 43, 44 ... Roller

Claims (4)

[Claims] 1. A slot which exposes an end surface of a sliding portion is formed in a shutter which is slidable in a lateral direction perpendicular to a cartridge inserting direction with respect to a sliding portion of a cartridge body. A rotating arm that is rotated based on a rotating force generated by insertion of a disk cartridge that is reciprocated between,
A cylindrical body engaged with a shutter opening / closing slot of the disk cartridge is rotatably supported at the tip of the rotating arm, and the cylindrical body opens the shutter based on a lateral component of the rotating power. In a shutter opening / closing mechanism for a disk cartridge that is opened by being pushed in a lateral direction, the cylindrical body includes a plurality of rollers divided in an axial direction thereof, and the plurality of rollers are configured to be rotatable independently of each other. Features a shutter opening and closing mechanism for disk cartridges. 2. The disk cartridge shutter opening / closing mechanism according to claim 1, wherein the number of the rollers is two, and the rollers are provided on both sides of the plate of the rotating arm. 3. The disk cartridge shutter opening / closing mechanism according to claim 2, wherein one of the rollers is in contact with the shutter, and the other of the rollers is rotatably in contact with the end face. . 4. The disk cartridge shutter opening / closing mechanism according to claim 3, wherein the shutter has a slider, and one of the rollers is in contact with the slider.