JP2559565Y2 - Magnetic disk drive - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk drive, and more particularly to a slider damper mechanism.

[0002]

2. Description of the Related Art FIG. 10 shows a damper mechanism for a slider of a conventional 3.5-inch magnetic disk drive.

In FIG. 1, reference numeral 10 denotes a slider which is provided on a chassis (not shown) so as to be slidable in X ₁ and X ₂ directions, and is urged in a X ₁ direction by a return spring 11. .

[0004] The slider 10 has a startup piece 10a, is engaged by the arm of the latch lever 12 is latched in a position slid in X ₂ direction.

[0005] Reference numeral 13 denotes an oil damper, which has a structure in which fins rotate in oil enclosed in a case, and mesh with the rack portion 10b of the slider 10.

[0006] 3.5 inch magnetic disk cartridge 2
When the cartridge 20 is inserted into a holder (not shown) to the final position, the cartridge 20
2b is pressed and rotated clockwise against the spring 14.

As a result, the arm portion 12a is raised from the rising piece 10a.
The slider 10 is unlatched and the spring 11
By sliding the X ₁ direction.

[0008] With the X ₁ direction sliding of the slider 10, a holder (not shown) is moved toward the chassis (not shown), a magnetic disk cartridge 20 is mounted to the predetermined position.

[0009] during sliding of X ₁ direction of the slider 10, the oil damper 13 is operated, the slider 10 slides at a slower rate as shown by line I in Fig. 9 while being braked, the magnetic disk cartridge 20 is suitable Mounted at speed.

[0010]

The oil die 13 uses oil, and the viscosity of the oil changes depending on the temperature. Therefore, the performance of the oil damper 13 varies depending on the temperature of the atmosphere in which the magnetic disk device is used.

For this reason, for example, when the temperature is low and the braking force of the oil damper 13 is increasing, the moving speed of the slider 10 becomes slow as shown by the line Ia, and the magnetic disk cartridge is mounted on the turntable 15. Momentum is reduced.

Therefore, in some cases, as shown in FIG. 11, the center hole 23 of the hub 22 of the magnetic disk 21 is
The motor shaft 16 could not be fully fitted, and could be caught halfway through the motor shaft 16, possibly causing an accident of incomplete mounting.

The oil damper 13 is relatively expensive.

In FIG. 9, line III represents the oil damper 1.
3 shows the moving speed of the slider 10 when there is no 3.

Therefore, an object of the present invention is to provide a magnetic disk drive which solves the above-mentioned problems.

[0016]

According to the first aspect of the present invention, a chassis, a holder provided on the chassis, for holding an inserted magnetic disk cartridge, and slidably provided on the chassis. A slider that is urged in one direction by a return spring, slides in the one direction by the spring, moves the holder, and mounts a magnetic disk cartridge held in the holder; In a magnetic disk drive having a damper mechanism provided for the slider and for reducing the force of sliding of the slider by the spring, the damper mechanism is formed on a torsion coil spring provided on the chassis and the slider. A first slit extending in a direction in which the slider slides, and a second slit orthogonal to the first slit. An opening having a guide edge formed in a portion of the chassis corresponding to the L-shaped slit of the slider, the guide edge being inclined with respect to the sliding direction of the slider; And one arm of the torsion coil spring passes through the L-shaped slit and the opening to lock the edge of the second slit of the L-shaped slit, and the slider is As the return spring slides in the one direction, the one arm is moved toward the first slit while being guided by the guide edge of the opening. The one arm portion comes out of the second slit portion and enters the first slit portion, and thereafter, the one arm portion relatively moves in the first slit portion to move the slider. But with the above one arm It is obtained by the structure to move independently.

[0017]

The L-shaped slit of the slider, the opening of the chassis, and the one arm of the torsion coil spring allow the damper action to be performed halfway during the sliding of the slider, and thereafter the damper action to be prevented. Act on.

[0018]

2 to 4 show a magnetic disk drive 50 according to an embodiment of the present invention.

The magnetic disk drive 50 includes a magnetic disk drive main body for a 5-inch disk cartridge (hereinafter referred to as a 5-inch magnetic disk drive main body) 51 and a magnetic disk drive main body for a 3.5-inch magnetic disk cartridge (hereinafter referred to as 3). (It is called the magnetic disk drive body for .5 inch)
52, a front bezel 5 having an insertion port 53 for a 5-inch magnetic disk cartridge 40 and an insertion port 54 for a 3.5-inch magnetic disk cartridge 41.
5 is attached.

The magnetic disk drive main body 51 for 5 inches is
As shown in FIG. 3, a chassis 56 made of die-cast
It has a general configuration in which a magnetic disk rotation motor 57, a magnetic head carriage device 58, and a magnetic disk clamp device 59 are assembled.

The 5-inch magnetic disk drive main body 51
Does not have a top plate (cover).

3.5 inch magnetic disk drive main body 52
As shown in FIG. 1 and FIG.
, A slider 71, a holder 72, and a cover 73.

The holder 72 and the slider 71 have a size corresponding to the 3.5-inch magnetic disk cartridge 41.

The holder 72 holds the inserted 3.5-inch magnetic disk cartridge 41.

The slider 71 has X ₁ , X
_The holder 72 is slidably provided in _two directions, and slides to move the holder 72 up and down.

The holder 72 is located at a high position,
Is provided so as to be able to move up and down between a low position approaching.

The high position is a position for receiving the magnetic disk cartridge or a position for detaching the magnetic disk cartridge, and is a height corresponding to the insertion opening 54 of the front bezel 55.

The lower position is where the magnetic disk cartridge is mounted.

The chassis 70 has projections 77 and 78 projecting outside holder holders 75 and 76 supporting the holder 72, and is wider than the holder 72. Approximately the same width W
_{With one} .

The chassis 70 is provided with a motor 80 for rotating a 3.5-inch magnetic disk and a magnetic head carriage device 79.

[0031] The slider 71 is biased with a force F ₁ in the arrow X ₁ direction by the return coil spring 90.

As shown in FIG. 5, the slider 71
Is a locking surface 92 formed by the cut-and-raised portion 91 downward.
And it is locked by the locking arms 93a of the latch lever 93, in a position which slides in X ₂ direction is limited sliding of the X ₁ direction.

The latch lever 93 is pivotally supported by a shaft 94 on the chassis 70, and is urged to rotate counterclockwise by a spring 95.

Further, the overhang portion 78 is provided with a damper mechanism 100 utilizing a spring which is a main part of the present invention.
This damper mechanism 100 will be described later.

The magnetic disk device 50 having the above-described configuration has 3.5
When the inch magnetic disk cartridge 41 is inserted and pushed in, the latch lever 93 is pushed and rotated, and the latch is released.

[0036] When the latch is released, slide in the X ₁ direction by the slider 71 spring 90. At this time, the slider 71 slides while damping the sliding force by the damper mechanism 100. With the above sliding of the slider 71, the holder 72 is moved downward in the Z ₁ direction 3.5-inch magnetic disk cartridge 41 is mounted.

Next, the damper mechanism 10 which is an essential part of the present invention will be described.
0 will be described.

FIG. 6 shows the damper mechanism 100 of FIG.
FIG. 6 is a view as seen from the direction of VI-VI, in which side walls of the chassis are omitted.

FIGS. 7A to 7D and FIGS. 8A to 8D respectively show the damper mechanism 10 when the slider 71 slides.
It is a figure explaining change of a state of 0. FIGS. 7A and 8
(A) corresponds.

FIGS. 7A and 8A show a state before the operation.

FIGS. 7 (D) and 8 (D) show the state when the sliding of the slider 71 is completed.

FIGS. 7B and 7C and FIGS.
(C) shows the state in which the slider 71 is in the middle of sliding, respectively, and corresponds.

FIGS. 7 (C) and 8 (C) show a state when the damper function is eliminated.

A torsion coil spring 101 has a coil portion 101a and arms 101b and 101c extending from the end of the coil portion 101a.

In the torsion coil spring 101, the coil portion 101 a is fitted to a pin 102 on the chassis 70, and is prevented from coming off by a screw 103.

The arm 101b is provided on the side wall 70b of the chassis 70.
It is locked to.

The arm 101c is bent in a U-shape.
101c- ₁ is a U-shaped bent portion.

As shown in FIG. 6, the arm 101c
Once started on the way, the tip side is three-dimensionally downward,
It is bent in a crank shape. 101c- ₂ is a crank-shaped bent portion. Of the crank-shaped bent portion 101c- ₂ , 1
01c- ₃ is a vertical bar, and 101c- ₄ is a horizontal tip.

At the left end of the slider 71, an L-shaped slit 104 is formed.

The L-shaped slit 104 is
The first slit portion 104a extends in the sliding direction (X ₁ , X ₂ direction), and extends from the end of the first slit portion 104a in a direction (Y ₂ direction) orthogonal to the first slit portion 104a. It comprises the second slit portion 104b.

The first slit portion 104a is provided with the slider 7
It has a length longer than one sliding stroke.

The second slit portion 104b is
_{Has -1} .

The chassis 70 has an opening 105.

The opening 105 is formed at the position of the L-shaped slit 104.

The opening 105 has a guide edge 105a. The guide edge 105a is linear, and the slider 71
Angle in the clockwise direction with respect to X ₁ direction is a sliding direction of the α
(Approximately 50 degrees) and is substantially along an arc centered on the U-shaped bent portion 101c- ₁ .

When the slider 71 is located at the position S ₁ before sliding, the damper mechanism 100 operates as shown in FIGS.
It is in the state shown in FIG.

That is, the second slit portion 104b has the opening 1
05. The crank-shaped bent portion 101c- ₂ of the arm portion 101c is formed by the second slit portion 104b and the opening 105.
And the horizontal tip portion 101c- ₄ is
And is restricted from coming off.
Vertical rod portion 101c _-3, among the edges 104b _-1 of the second slit portion 104b, which engages part of the inner part of the second slit 104b, i.e. the X _2, Y ₂ direction.

[0058] arm unit 101c in FIG. 1, X ₁ direction is elastically deformed, the damper mechanism 100 urges the force F ₂ the slider 70 in the X ₂ direction. F ₂ <F ₁ .

3.5 inch magnetic disk cartridge 4
1 is inserted, the latch is released, the slider 71 starts to slide in the X ₁ direction by the coil spring 90.

As will be described below, the slider 71
It slides while being braked by the damper mechanism 100 (the middle line in FIG. 9).
IIa), the damper mechanism 100 stops operating halfway, and then slides at a speed required for sufficient chucking without braking (indicated by IIb in FIG. 9). (1) Step (S ₁ → S ₂ ) Halfway The slider 71 is moved to the edge 104 of the second slit portion 104b.
Pressing the vertical bar portion 101c- ₃ at b- ₁ causes the arm portion 101c to move as shown in FIG.
(A) while bending the middle X ₁ direction, i.e., slid while resisting the spring force of the spring 101.

That is, the damper mechanism 100 applies a braking force to the sliding of the slider 71, and while the braking force is applied to the slider 71 by the damper mechanism 100, as shown by the line IIa in FIG. Sliding while being suppressed.

When the slider 71 slides, the vertical bar 10
1C- _{3 corresponds} to the guide edge 105a, and FIG. 7 (B) and FIG.
(B), the guided by the guide edge 105a is closer to the Y ₁ direction.

When the slit 71 slides to the position S ₂ ,
As shown in FIGS. 7C and 8C, the vertical bar 101
c _-3 is Italian the end edge 104b _-1, disengaged from the edge 104b _-1. (2) Stage from the middle to the end (S ₂ → S ₃ ) When the vertical bar portion 101c- ₃ comes off the edge 104b- ₁ , the damper mechanism 100 stops acting on the slider 71, and the slider 71 as indicated by line IIb, vigorously slides gaining speed than ever, reaches the final position S _3.

At this time, the vertical rod portion 101c- ₃ enters the first slit portion 104a, and
04a relatively enters the back.

[0065] The slider 71 to slide in the final stage in a predetermined momentum, Z ₁ direction movement of the holder 72 is also made at the desired momentum.

As a result, the 3.5-inch magnetic disk cartridge is normally mounted without being caught in the middle as shown in FIG.

The reason why the damper mechanism 100 is not driven halfway is to make the slider 71 have a desired momentum in the final stage.

Since the damper mechanism 100 has a structure using a spring, there is no influence of the temperature on the characteristics, and the damper mechanism 100 has the same characteristics under any temperature conditions, so that the magnetic disk device 50 is used in any environment. The magnetic disk cartridge is normally mounted.

[0069] Note that the eject button is pressed, the slider 71 is slid in the X ₂ direction, when moving from the position S ₃ to the position S _1, the damper mechanism 100, and the via reverse operation sequence 7 (A) and FIG. 8 (A).

At this time, the damper mechanism 100 does not apply a braking force, and accordingly, the pressing force of the eject button is light.

Next, another effect associated with the provision of the damper mechanism 100 will be described.

In the initial state, the slider 71 has
In addition to the force F ₂ of the force F ₁ is used.

For this reason, the force in the X ₁ direction is smaller than the force F ₁ by the force F ₂ .

For this reason, the force by which the locking surface 92 pushes the locking arm 93a is smaller than in the prior art.

Therefore, the following two effects are obtained.

When the latch is released, the locking arm 93 shown in FIG.
The degree to which a rubs the locking surface 92 is reduced. For this reason, even after the magnetic disk drive has been used for many years, the locking surface 92
In addition, friction of the locking arm 93a can be reduced. Therefore, the reliability of the latch mechanism of the slider 71 is high.

As the spring 95, a spring having a small spring force can be used.

Thus, the insertion force at the final stage of the magnetic disk cartridge when the latch lever 93 is rotated can be reduced.

Since the damper mechanism 100 has a simple structure using a spring, it is less expensive than an oil damper.

[0080]

As described above, according to the first aspect of the present invention, the damper function is exerted from the beginning to the middle of the entire length of the slider slid by the return spring. Since the slider slides without being affected by the damper action, the optimal speed that the magnetic disk cartridge is not mounted too fast or too slow without being affected by the temperature as in the case of the oil damper. And can be done with momentum. As a result, the magnetic disk cartridge is securely mounted, the occurrence of defective mounting can be eliminated, and the magnetic head is protected from contact with the magnetic head without excessively vigorous contact. Can be done.

In the first stage, the force of the torsion coil spring acts in the opposite direction to the force of the return spring.
The pressing force of the slider on the latch lever that latches the slider is weaker than usual due to the force of the torsion coil spring. Therefore, the latch lever can be unlatched more smoothly when the magnetic disk cartridge is inserted to the final position, and the problem of wear of the portion where the latch lever and the slider are engaged can be solved.

[Brief description of the drawings]

FIG. 1 is a plan view showing a damper mechanism of a main part of the present invention.

FIG. 2 is a perspective view of the magnetic disk drive according to one embodiment of the present invention;

FIG. 3 is an exploded perspective view of the magnetic disk drive of FIG. 2;

FIG. 4 is an exploded perspective view of the 3.5-inch magnetic disk device main body in FIG. 3;

FIG. 5 is a diagram showing the latch mechanism of the slider in FIG. 3;

FIG. 6 is a view of the damper mechanism of FIG. 1 as viewed from the line VI-VI.

[7] The slider is a perspective view showing the operation of the damper mechanism when sliding in the X ₁ direction.

FIG. 8 is a plan view showing a relationship among an L-shaped slit, an opening, and an arm of a torsion coil spring in FIG. 7;

FIG. 9 is a diagram illustrating a relationship between a moving distance of the slider and a moving speed of the slider.

FIG. 10 is a diagram showing a part of a conventional magnetic disk drive.

FIG. 11 is a diagram illustrating incomplete mounting of a magnetic disk cartridge which can occur with a conventional magnetic disk device.

[Explanation of symbols]

12 Latch lever 40 Magnetic disk cartridge for 5 inch 41 Magnetic disk cartridge for 3.5 inch 50 Magnetic disk device 51 Magnetic disk device main body for 5 inch magnetic disk cartridge 52 3.5 inch Magnetic disk device main body for magnetic disk cartridge 53 5 inch Insertion opening for magnetic disk cartridge 54 Insertion opening for 3.5-inch magnetic disk cartridge 55 Front bezel 70 Chassis 70a, 70b Side wall 71 Slider 72 Holder 73 Cover 77, 78 Overhang portion 79 Magnetic head carriage device 80 Mounting foot 90 Returning coil Spring 91 Lower cut-and-raised portion 92 Locking surface 93 Latch lever 93a Locking arm portion 93b Rising piece 94 Shaft 95 Spring 100 Damper mechanism 101 Torsion coil spring 101a Ill part 101b Arm part 101c Arm part 101c _-1 U-shaped bent part 101c _-2 Crank-shaped bent part 101c _-3 Vertical rod part 101c _-4 Horizontal tip part 102 Pin 103 Screw 104 L-shaped slit 104a First Slit portion 104b Second slit portion 104b- ₁ edge 105 Opening 105a Guide edge

Claims (1)

(57) [Scope of request for utility model registration] 1. A chassis, a holder provided on the chassis and holding an inserted magnetic disk cartridge, slidably provided on the chassis, and urged in one direction by a return spring. A slider that slides in the one direction by the spring to move the holder and mount a magnetic disk cartridge held in the holder; and a slider provided with respect to the slider. In a magnetic disk drive having a damper mechanism for reducing the force of sliding by a spring, the damper mechanism is formed on a torsion coil spring provided on the chassis and the slider, and a direction in which the slider slides. An L-shaped slit composed of a first slit portion extending in a direction, and a second slit portion orthogonal to the first slit portion; An opening having a guide edge inclined with respect to a sliding direction of the slider, formed in a portion of the chassis corresponding to the L-shaped slit of the slider; One arm portion is inserted through the L-shaped slit and the opening to lock an edge of a second slit portion of the L-shaped slit, and the slider is slid in the one direction by the return spring. As the arm moves, the one arm is moved toward the first slit while being guided by the guide edge of the opening. During the sliding of the slider, the one arm is moved toward the first slit. Then, the first arm portion moves out of the second slit portion and enters the first slit portion. Thereafter, the one arm portion relatively moves within the first slit portion, and the slider is moved independently of the one arm. Moved configuration Magnetic disk apparatus according to claim and.