JP3456402B2 - Recording medium recording / reproducing device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recording medium recording / reproducing apparatus, and more particularly to a recording medium recording / reproducing apparatus for recording / reproducing information by bringing a head close to a removable recording medium when recording / reproducing information.

[0002]

2. Description of the Related Art For example, an electronic device such as a personal computer or a word processor is equipped with a magnetic disk device as a means for recording information. As a magnetic disk device, for example, Japanese Patent Laid-Open No. 8-55 is used.
As seen in Japanese Patent Publication No. 402, when a disk cartridge as a recording medium is mounted, the magnetic disk housed in the disk cartridge is rotationally driven and the magnetic head slides on the magnetic disk to perform magnetic recording / reproduction. Some are configured to do.

Further, in the above magnetic disk device,
A disc holder into which the disc cartridge is inserted,
A structure having a recording medium transfer mechanism including a slider that slides by the insertion operation of the disk cartridge to move the disk holder from the cartridge insertion / ejection position to the cartridge mounting position, and a slider that loads the magnetic head to a position in contact with the magnetic disk. It has become.

The slider is biased in one direction by a coil spring or the like, and when the disk cartridge is inserted, the latch lever is pressed against the end portion of the disk cartridge to rotate, and the latching of the slider by the latch lever is released. To be done. As a result, the slider slides in the urging direction to move the disk holder to the cartridge mounting position. At this time, the disc holder lowers from the cartridge insertion / eject position to the cartridge mounting position, thereby chucking the disc in the disc cartridge on the turntable.

Further, the movement of the slider drives the head lift mechanism to bring the magnetic head into contact with the disk.
At this time, in the conventional head lift mechanism, the magnetic head approaches and separates from the disk by rotating a lift arm rotatably provided on the holder. The lift arm is rotated by the lifter.

FIG. 18 shows a block diagram of a conventional example. The lifter 100 is slidably provided on the disc holder 101, and slides on the disc holder 101 according to the slide of the slider. Further, the lifter 100 has the convex portion 1
02, and the convex portion 102 is inserted between the lift arm 103 and the disc holder 101 at one side end portion of the lift arm 103, whereby the lift arm 103 is rotated with respect to the disc holder 101, and lift is performed. Arm 10
The head arm 104 engaged with No. 3 is lifted upward to separate the magnetic head 105 from the disk. When the magnetic head 105 is brought close to the disk, the convex portion 1
By pulling 02 from between the lift arm 103 and the disc holder 101, the rotation of the lift arm 103 is released, and the head arm 104 is lowered.

[0007]

However, in the conventional recording medium recording / reproducing apparatus of this type, the convex portion of the lift is inserted between the disc holder and the lift arm at one side end of the lift arm, or Since the head arm was raised and lowered by controlling the rotation angle of the lift arm with respect to the disk holder by pulling it out, the driving force from the lift concentrates only on one side end of the lift arm, and the lift arm rotates. However, in some cases, the lift arm tilts, the head arm lowers below a predetermined level, the head contacts the recording medium, and the head is damaged.

The present invention has been made in view of the above points, and an object of the present invention is to provide a recording medium recording / reproducing apparatus capable of reliably moving a head closer to or away from a recording medium.

[0009]

According to a first aspect of the present invention, a head for recording / reproducing information on / from a recording medium is brought close to the recording medium when the recording medium is mounted at a predetermined mounting position. In a recording medium recording / reproducing apparatus that separates a recording medium from a predetermined mounting position, the head is held, and a head arm that moves the head close to or away from the recording medium is centered around a rotation axis. Rotatable
One end of the rotary shaft in the radial direction is attached to the head arm.
To engage with the arm and rotate about the rotation axis.
More, the lift arm causes rotation of the head arm as the head is proximate away from the said recording medium,
On the side of the one end of the lift arm having an engagement portion that match engagement with the lift arm, the pivot axis of the lift arm
It slid in a direction parallel, and having a lifter rotating the lifting arm in accordance with the engagement state between the lift arm and the front Symbol engaging portion.

According to a second aspect of the present invention, in the lifter according to the first aspect, the plurality of engaging portions are arranged in parallel with a rotation axis of the lift arm.

According to the second aspect, by arranging the plurality of engaging portions in parallel with the rotation axis of the lift arm, the force can be applied evenly over the entire rotation axis of the lift arm. Can be rotated smoothly, and the head can be reliably released.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a recording medium recording / reproducing apparatus according to the present invention will be described below with reference to the drawings. In this embodiment, a floppy disk device will be described as a recording medium recording / reproducing device.

FIG. 1 is an exploded perspective view of an embodiment of the present invention, FIG. 2 is an exploded perspective view of a cover, slider, holder and frame of the embodiment of the present invention, and FIG. 3 is a slider of the embodiment of the present invention. 3A and 3B show an assembly configuration diagram of a holder. In the floppy disk device 11 of this embodiment, a disk holder 12 into which a disk cartridge (not shown) is inserted and a slider (sliding member) 13 which slides in the front-rear direction to move the disk holder 12 up and down are superposed. It is mounted on the frame 14 in the closed state.

The slider 13 is provided on the disk holder 12 so as to be slidable in the A and B directions, and is slid in the A direction when the disk cartridge is inserted into the disk holder 1.
2 is lowered from the cartridge insertion / eject position to the cartridge mounting position. The disc holder 12 includes a top plate 12a and a cartridge guide portion 12 bent so as to hold the disc cartridge from both sides of the top plate 12a.
b and 12c. Therefore, the space surrounded by the top plate 12a and the cartridge guide portions 12b and 12c on both sides serves as a cartridge insertion portion. The top plate 12a of the disc holder 12 is provided with an opening 12d for moving the head carriage 18, and a pair of support portions 12h for rotatably supporting the lift arm 42 are cut and raised on the left side of the opening 12d. ing.

The slider 13 has a flat plate 13a which slides above the disk holder 12, side faces 13b and 13c bent downward from both sides of the flat plate 13a, and side faces 13b and 13b.
the inclined groove 13d, which is provided in c, and into which the engaging pin 12e of the disk holder 12 is fitted, and the side surfaces 14e of the frame 14,
An abutting portion 13e that abuts the upper end of 14f, and a hole 1 provided in the central portion of the disc holder 12 in the eject state.
And an engaging portion 13f that engages with 2g.

Then, on the flat plate 13a of the slider 13,
Coil springs 51 and 52 for urging the slider 13 in the A direction
Are provided with openings 13g and 13h. The openings 13g and 13h are formed so as to extend in the A and B directions, and hook portions 13i and 13j to which one ends of the coil springs 51 and 52 are hooked are projected at the end portions in the B direction. The other ends of the coil springs 51, 52 are hooked by hooking portions 12i, 12j protruding from the top plate 12a of the disc holder 12. Therefore, the slider 13 has the coil springs 51, 52.
Is urged in the direction A by the spring force of.

FIG. 4A is a plan view showing the structure of the frame 14. Further, FIG. 4B is a rear view showing the configuration of the frame 14. As shown in FIGS. 1 to 4, and on the plane 14 a of the frame 14, a circular opening 1 into which a turntable 15 for clamping a disc is inserted.
4b, and a carriage mounting portion 14c to which a head carriage 18 that supports the magnetic heads 16 and 17 is slidably mounted in the A and B directions. Further, a motor mounting portion 14d to which a motor 25 that drives the head carriage 18 is mounted is provided on the rear portion of the frame 14.

Both sides of the carriage mounting portion 14c and the motor mounting portion 14d are cut in a rectangular shape.
Therefore, the rear portion of the frame 14 has the carriage mounting portion 1
Only 4c and the motor mounting portion 14d have a shape protruding rearward. Also, both side surfaces 14e, 1 of the frame 14
Guide grooves 14g and 14h for guiding the up-and-down movement of the disk holder 12 are provided at intermediate positions of the inner wall of 4f. Further, a circuit board 20 on which a turntable 15 and a disk motor 19 that rotationally drives the turntable 15 are mounted is attached to the lower surface side of the frame 14.

The head carriage 18 has a carriage body 21 that supports the lower magnetic head 16 on the top surface of the tip and a carriage body 21 that supports the top magnetic head 17 on the bottom surface of the tip.
And a head arm 22 rotatably attached thereto. In addition, the head carriage 18 is guided by the guide shaft 23 and the lead screw 24 extending in the front-rear direction (directions A and B) and responds to the rotation amount of the lead screw 24 in a direction corresponding to the rotation direction of the lead screw 24. Move a distance. Guide shaft 23
Is a plate-shaped pressing member 2 on the flat surface 14 a of the frame 14.
It is held by 9 and is inserted into a fitting portion 21 a provided on the right side surface of the carriage body 21. Further, the lead screw 24 is screwed into a screwing portion (not shown) provided on the left side surface on the opposite side of the carriage body 21.

The motor 25 that rotationally drives the lead screw 24 is mounted on the lower surface of the motor mounting portion 14d provided on the rear portion of the frame 14. for that reason,
The head carriage 18 is guided by the guide shaft 21 and the guide shaft 24 by the rotational driving force of the motor 25 that rotationally drives the lead screw 24, and moves in the A and B directions. As a result, the magnetic heads 16 and 17 supported by the head carriage 18 can be brought into sliding contact with desired tracks of a magnetic disk (not shown) housed in the disk cartridge to perform magnetic recording / reproduction. .

On the plane 14a of the frame 14,
A protector 26 for preventing the end portion of the disk cartridge inserted in the disk holder 12 from colliding with the lower magnetic head 16 is provided slidably in the C and D directions by being guided by a pin 14i protruding above the flat surface 14a. Has been.
The protector 26 is connected to a pin 27a provided at one end of an L-shaped link 27, and a pin 27b provided at the other end of the link 27 is engaged with an engaging portion 13k of the slider 13.

Therefore, before the disc cartridge is inserted into the disc holder 12, the protector 26 is close to the side of the lower magnetic head 16. At that time, the protector 26 rides on the inclined portion 28 formed on the flat surface 14 a of the frame 14 and is lifted above the lower magnetic head 16. Therefore, the disk cartridge is prevented from slidingly contacting the protector 26 and moving above the lower magnetic head 16 and colliding with the lower magnetic head 16.

The slider 13 slides in the direction A and away from the lower magnetic head 16. Therefore, when the slider 13 slides in the A direction, the protector 26 slides in the D direction and descends below the inclined portion 28, and the lower magnetic head 16 is brought into contact with the magnetic disk. FIG. 5 is an exploded perspective view of the latch mechanism of the embodiment of the present invention.

As shown in FIGS. 1 and 5, at the rear portion of the upper surface of the disk holder 12, a latch mechanism 36 for locking the slider 13 is provided. This latch mechanism 36
Is a latch lever 38 rotatably supported on the upper surface of the disc holder 12, a coil spring 39 for biasing the latch lever 38 to rotate counterclockwise, and a cam portion provided on the top plate 13a of the slider 13. And 46.

FIG. 6 is a view for explaining the shape of the latch lever of one embodiment of the present invention. As shown in FIGS. 6A to 6E, the latch lever 38 has a shaft hole 38a at one end through which the shaft at the rear portion of the upper surface of the disc holder 12 is inserted.
The other end has a claw portion 38b for opening a shutter (not shown) of the disc cartridge. In addition, the latch lever 38
Has a latching portion 38c at one end of which the coil spring 39 is latched, and a sliding contact portion 38d which is in sliding contact with the cam portion of the slider 13. The coil spring 3
The other end of 9 is hooked on a hooking portion 12k provided on the top plate 12a of the disc holder 12.

A hooking portion 38e for preventing the slider 13 from coming off is bent at the upper end of the sliding contact portion 38d. Further, on the upper portion of the claw portion 38b, there is provided a regulation portion 38f which regulates the rotational height position so that the claw portion 38b is held at the insertion height position of the disc cartridge inserted into the disc holder 12. There is. Further, as shown in FIG. 5, a shaft for inserting the shaft hole 38a of the latch lever 38 into the rear portion of the top plate 12a of the disk holder 12 and supporting the latch lever 38 rotatably in the E and F directions. 1
2 m, and a slip-out preventing portion 12n that is inserted into the groove 38g of the latch lever 38 during assembly and then restricts the upward movement of the latch lever 38. Removal prevention unit 12
n is a protrusion 12 that regulates the height position of the upper surface of the latch lever 38 so that the latch lever 38 does not come off the shaft 12m.
n ₁ projects horizontally. Further, the top plate 12 a of the disc holder 12 is provided on the claw portion 38 of the latch lever 38.
b is an arc-shaped opening 1 through which the disc holder 12 is inserted.
2o is provided.

Further, on both sides of the disc holder 12,
A pair of engagement pins 12e that engage with the slider 13 are provided, and the guide portion 12 is provided at the center of both sides of the disc holder 12.
f is protruding. This guide portion 12f is the frame 1
Guide grooves 14g provided on the side walls 14e and 14f of
The disc holder 12 is fitted with 14h to guide the up-and-down movement of the disc holder 12.

A cover 45 is provided above the slider 13 so as to cover the upper portion of the frame 14. Next, the latch mechanism 36 will be described.
As shown in FIGS. 1, 2, 3, and 7, the slider 1
The flat plate 13a of No. 3 is provided with a cam portion 46 for locking the above-mentioned latch lever 38. Cam part 46
Passes through the arc-shaped portion 47 with which the sliding contact portion 38d of the latch lever 38 slides while moving in the rotating direction in the process of inserting the disc cartridge, and the arc-shaped portion 47 when the insertion of the disc cartridge is completed. It has an escape portion 48 formed in a direction away from the sliding contact portion 38d.

On the flat plate 13a of the slider 13,
The cam portion 46 is formed, and a fan-shaped opening 49 for moving the sliding contact portion 38d is provided. The latch lever 38 is provided outside the opening 49.
An arc-shaped opening 50 is provided at the tip of the disk, and faces the rotation range of the claw portion 38b that engages with the shutter of the disk cartridge.

Further, at the rear portion of the flat plate 13a of the slider 13, a contact portion 53 extending in the B direction is provided.
The contact portion 53 is provided on the rear side of the frame 14 while the slider 13 slides in the A and B directions.
The slider 1 contacts the guide wall 42 that stands above d.
3 Guide the sliding motion. 8 is a perspective view showing a state in which a latch lever is attached to a top plate of a disc holder according to an embodiment of the present invention, and FIG. 9 shows a state in which a slider is attached above the latch lever according to an embodiment of the present invention. The perspective view shown is shown.

As shown in FIG. 8, when the disc cartridge is inserted into the disc holder 12, the latch lever 38 rotates in the E direction against the spring force of the coil spring 39. At this time, the shutter of the disk cartridge engages with the claw portion 38b provided at the tip of the latch lever 38 and slides in the opening direction. Since the latch lever 38 is not provided with a cam portion on the rear portion thereof with which the protrusion of the slider 13 is slidably contacted, the latch lever 38 does not project rearward from the disc holder 12 even when rotated in the E direction.

Further, as shown in FIG.
Since the rear end of the disc holder 3 is located on the front side of the rear end of the disc holder 12, there is nothing that projects rearward from the disc holder 12. Therefore, the latch lever 3
It is not necessary to secure a space behind 8 and the shape of the frame 14 is correspondingly cut into a rectangular shape on both sides of the carriage mounting portion 14c and the motor mounting portion 14d as shown in FIG. There is. Therefore, the installation space of the frame 14 can be reduced, and the size and space of the floppy disk device 11 can be reduced.

Next, the disk loading operation of the floppy disk device 11 configured as described above will be described.
FIG. 10 is a diagram showing a positional relationship between the disc holder 12 and the slider 13 in a state where the disc cartridge is ejected. As shown in FIGS. 10A to 10D, since the engaging pin 12e of the disk holder 12 is fitted in the inclined groove 13d of the slider 13, the slider 1
By the sliding motion of 3, the engaging pin 12e is driven along the inclined groove 13d. Therefore, when the slider 13 slides in the B direction, the disc holder 12 moves up to the cartridge insertion / eject position, and when the slider 13 slides in the A direction, it moves down to the cartridge mounting position.

Therefore, in the eject state shown in FIG. 10, the disc cartridge (not shown) is moved to the disc holder 12.
When it is inserted into the inside, the claw portion 38b of the latch lever 38 is pressed and rotated in the clockwise direction (E direction). The sliding contact portion 38d of the latch lever 38 is attached to the top plate 13 of the slider 13.
The arcuate portion 47 of the cam portion 46 provided on a is slidably contacted.

The disc cartridge is the disc holder 1
When it is inserted all the way to the back, the shutter will
8, the sliding contact portion 38d of the latch lever 38 passes through the arc-shaped portion 47 of the cam portion 46 and faces the escape portion 48 of the cam portion 46. Therefore, the latch 13 is released from the latch lever 38, so that the slider 13 slides in the A direction by the spring force of the coil springs 51 and 52.

FIG. 11 is a view showing the positional relationship between the disk holder 12 and the slider 13 with the disk cartridge mounted. Since both sides of the disc holder 12 are supported so as to be movable only in the vertical direction with respect to the left and right side surfaces of the frame 14, when the slider 13 slides in the direction A as described above, the engagement pin 12e of the disc holder 12 is moved. It is driven downward along the inclined groove 13d of the slider 13 to descend from the cartridge insertion / ejection position shown in FIG. 10 to the cartridge mounting position shown in FIG.

In the ejecting operation, when the slider 13 is slid in the B direction, the disk holder 12 returns to the cartridge inserting / ejecting position shown in FIG. Along with this, the latch lever 3
8 is ejected in the A direction while rotating in the F direction by the spring force of the coil spring 39. By this ejecting operation, the disc cartridge is ejected from the disc holder 12 after the shutter is closed.

Next, the head arm lift mechanism 41, which is a feature of the present invention, will be described in detail. The head arm lift mechanism 41 is provided on the upper surface of the disc holder 12. The head arm lift mechanism 41 holds the head arm 22 in the raised position where it does not contact the disk cartridge when the disk cartridge is not inserted and is in the non-inserted state.

The head arm lift mechanism 41 includes a lift arm 42 that abuts the lower surface of the head arm 22, a lifter 43 that presses the lift arm 42 upward when the head arm 22 is not inserted, and a presser that presses the lift arm 42 downward. And a spring 44. FIG. 12 shows a configuration diagram of a lift arm according to an embodiment of the present invention. FIG. 12A shows the lift arm 42.
12B is a left side view of the lift arm 42, FIG. 12C is a right side view of the lift arm 42, and FIG.
2D is a sectional view of the lift arm 42 taken along the line AA.

The lift arm 42 is formed by punching and bending a single metal plate. The lift arm 42 is
The head arm pressing portion 42a is arranged mainly on the lower surface side of the protruding portion 22a of the head arm 22 and presses the head arm 22 upward from the lower surface when the disk is ejected, and is freely rotatable to the support portion 12h formed on the disk holder 12. Engaging portion 42b, head arm pressing portion 42a and engaging portion 42
It is composed of an arm portion 42c connecting with b. In addition,
The width W of the head arm pressing portion 42a is equal to the width W of the head arm 22.
Is set to a distance longer than the moving distance of the head arm 22
Is configured to be maintained in engagement with the protruding portion 22a of the head arm 22 regardless of the position.

The engaging portion 42b includes a convex portion 42d that engages with the supporting portion 12h of the disc holder 12, and the head arm 2
A pressing spring 44 that presses 2 toward the disc holder 12
The through hole 42e that engages with is integrally formed. The convex portion 42d engages with the support portion 12h of the disc holder 12 and rotatably holds the lift arm 42 on the holder 12. An end portion of the pressing spring 44 penetrates the through hole 42e and holds the pressing spring 44. Further, a through hole 42f that engages with the lifter 13 is formed in the arm portion 42c. Further, a stopper 42g for restricting the rotation of the head arm pressing portion 42a is formed at one side end of the head arm pressing portion 42a.

FIG. 13 shows a block diagram of a pressing spring according to an embodiment of the present invention. 13A is a plan view of the pressing spring 44, and FIG. 13B is a front view of the pressing spring 44. FIG. 13C shows a right side view of the pressing spring 44. The pressing spring 44 is bent in a rectangular wave shape in a plan view, and the end portion 44 a is inserted into the through hole 42 e of the lift arm 42, so that the lift arm 42
Held in. Further, the pressing spring 44 contacts the disk holder 12 and the pressing portion 44b that presses the arm portion 42c of the lift arm 42 due to the bent shape between the end portions 44a,
A fixing portion 44c that fixes the pressing spring 44 is configured.
Further, the fixed portion 44c is configured to be inclined by the angle θ.

FIG. 14 is an exploded perspective view of a lift arm, a pressing spring and a disc holder according to an embodiment of the present invention. As shown in FIG. 14, the support portion 1 of the disc holder 12
In 2h, a U-shaped notch 12p opened to the lower surface side is formed. Lift arm 42 to disk holder 1
14, the engaging portion 42b of the lift arm 42 is inserted into a through hole formed in a portion where the engaging portion 12h of the disc holder 12 is cut and raised to pass through the upper surface, as shown by a broken line in FIG. Side to bottom surface side, lift arm 42
The convex portion 42d of the engaging portion 42b is engaged with the cutout portion 12p of the disc holder 12 from the lower surface side of the disc holder 12.

Next, the pressing spring 44 is bent in the directions of arrows I and J, and the end portion 44a is passed through the through hole 42e of the lift arm 42.
To penetrate. The fixing portion 44c of the pressing spring 44 contacts the upper surface side of the disc holder 12, and the pressing portion 44b contacts the arm portion 42c of the lift arm 42 from the upper surface side. At this time, in the pressing spring 44, since the fixing portion 44c is bent at the angle θ, the pressing force in the arrow H direction acts on the fixing portion 44c and the pressing portion 44b due to this bending. Due to these pressing forces, a force in the arrow G direction acts on the end portion 44a of the pressing spring 44, the engaging portion 42b of the lift arm 42 is pushed up in the arrow G direction, and the convex portion 42d of the lift arm 42 of the disk holder 12 is pushed. Falling off from the cutout 12p is prevented. The arm portion 42c of the lift arm 42 is pressed in the arrow H direction, and the lift arm 42 is held rotatably in the arrow K direction against the pressing force of the pressing spring 44 on the upper surface side of the disk holder 12. .

The arm portion 42c is engaged with the lifter 43,
It is rotated in the directions of arrows K and L according to the insertion and ejection of the disc. Lifter 43 is provided in the lower portion of the lift arm 42, arrow A, and slides in the B direction, the arrow A direction of the peripheral portion and the arm portion 42c of <br/> through hole 42f of the lift arm 42
By engaging with the side end portion, the lift arm 42 is moved up and down according to the sliding movement of the slider 13 in the directions of arrows A and B.

[0046] shows the configuration diagram of a lifter of an embodiment of the present invention in FIG. 15. 15A is a plan view of the lifter 43, and FIG.
15B is a sectional view of the lifter 43 taken along the line AA, FIG. 15C is a sectional view of a main part of the lifter 43, and FIG. 15D is a front view of the lifter 43. The lifter 43 is formed by punching and bending a single metal plate, and is engaged with the slide portion 43 a that engages with the disc holder 12 and slides, and the through hole 42 f of the lift arm 42 to lift. The first elevating part 43b for rotating the arm 42, the lift arm 4
The second elevating part 43c that engages with the arrow A side end of the second arm part 42c to rotate the lift arm 42, slides the slide part 43a according to the slide of the slider 13, and slides the slide part 43a. Is composed of a pressing portion 43d for pressing the disk holder 12 side.

The first elevating part 43b is formed at one end of the slide part 43a, is inserted into the through hole 42f of the lift arm 42 when the disc is mounted, and is inserted on the lower surface side of the arm part 42c of the lift arm 42 when the disc is ejected. To be done. The second lifting part 43 c is formed at a substantially central portion of the slide portion 43a, at the time of disc loading A lift arm 42
From the side end of the arm portion 42c in the direction of arrow A, the arrow A
Direction, and disengaged from the lift arm 42,
When ejecting the disc, the arm portion 42 of the lift arm 42
It is inserted on the lower surface side of c.

The pressing portion 43d is bent upward from the other end of the slide portion 43a, and an engaging portion 43e which engages with the slider 13 is formed at the tip thereof. The pressing portion 43d has elasticity, and even when the disc is inserted into the disc holder 12, the disc holder 12 is lowered, and the gap between the disc holder 12 and the slider 13 is opened, the pressing portion 43d is elastic so that the pressing portion 43d is engaged. 43e is configured to securely engage with the slider 13.

FIG. 16 shows an exploded perspective view of a lifter and a disc holder according to an embodiment of the present invention. The slide portion 43a of the lifter 43 is guided by a guide 12q cut and raised on the upper surface of the disc holder 12, and is guided so as to be movable only in the directions of arrows A and B. The portion of the slider 13 facing the engaging portion 43e of the lifter 43 has an engaging portion 43e.
A claw portion 13l that engages with is formed. Pressing part 43d
By the elasticity of the slider 43 and the engaging portion 43e of the lifter 43
The engagement state with the claw portion 13l is always maintained.

Next, the operation of the head arm lift mechanism 41 will be described. FIG. 17 shows an operation explanatory view of the head arm lift mechanism of the embodiment of the present invention. FIG. 17A shows the state of the head arm lift mechanism 41 when the disc is ejected, and FIG.
7B shows the state of the head arm lift mechanism 41 when the disc is mounted. In the head arm lift mechanism 41, when the disc is ejected, the slider 13 is moved in the arrow B direction as shown in FIG. 17A, so that the lifter 43 is also moved in the arrow B direction.

When the lifter 43 moves in the direction of arrow B, the first elevating part 43b and the second elevating part 43c sneak into the lower surface of the arm part 43c of the lift arm 42, and the lift arm 42 rotates in the direction of arrow K. It is said to have moved.
When the lift arm 42 is rotated in the arrow E direction, the head arm 22 is rotated in the arrow G direction and is in the head-up state.

When the disc is mounted on the disc holder 12 and inserted in the direction of arrow B, the slider 13 slides in the direction of arrow A. When the slider 13 slides in the direction of arrow A, the lifter 43 moves in the direction of arrow A according to the sliding of the slider 13. When the lifter 43 moves in the direction of arrow A, the first elevating part 43b and the second elevating part 4
3c moves in the direction of arrow A, the first elevating part 43b engages with the through hole 42f of the lifter 43, and the second elevating part 43c disengages from the lower surface of the arm part 42c of the lift arm 42 . Therefore, in the lift arm 42, the holding of the lower surface by the first elevating part 43b and the second elevating part 43c is released, and it is pressed in the direction of arrow L by the pressing spring 44, as shown in FIG. Is rotated in the arrow L direction.

When the lift arm 42 is rotated in the direction of the arrow L, the head arm 22 is rotated in the direction of the arrow H and is in the head-down state. The head 17 comes into contact with the disk due to the head-down state. While the disc is being inserted into the disc holder 12, the disc holder 12 moves in the direction of the arrow H to separate the disc holder 12 from the slider 13. At this time, the lifter 43 is engaged by the pressing portion 43d. The portion 43e is pressed in the direction of arrow G,
The engagement state with the slider 13 is maintained.

At this time, the stopper 42g of the lift arm 42 contacts the disk holder 43, and the rotation of the lift arm 42 is restricted. Further, in FIG. 17A, since the disk holder 43 and the slider 13 are in close proximity to each other, the pressing portion 43d is in a pressed state, and the engaging portion 43 is in a pressed state.
17E is in a low position, and in FIG. 17B, the disc holder 43 and the slider 13 are separated from each other, so that the pressing portion 43d is opened and the engaging portion 43 is released.
e is in a high position.

As described above, according to the head arm lift mechanism 41 of this embodiment, the first arms are arranged in the direction parallel to the rotation axis of the lift arm 42, that is, in the directions of arrows A and B.
And the lift arm 4 by the second lifting units 43b and 43c.
By raising and lowering 2, the driving force can be uniformly applied by the two convex portions 42d of the lift arm 42, so that the lift arm 42 does not tilt and the lift arm 42 can smoothly rotate. Therefore, the head 17 can be surely moved up and down.

In the above embodiment, the magnetic disk device is described as an example. However, the present invention is not limited to this, and a card-shaped recording medium such as an optical disk device, a magneto-optical disk device or a memory card is mounted. It is needless to say that the present invention can be applied to a recording / reproducing device that is used. Further, in the above embodiment, the configuration in which the slider slides above the disk holder has been described as an example, but the present invention is not limited to this, and the present invention is also applied to a configuration in which the slider slides below the disk holder. can do.

[0057]

As described above, according to claim 1 of the present invention, the lift arm is fixed to one end in the radial direction of the rotary shaft.
When engaged with the saddle arm and rotated about the rotation axis,
By engaging with the engaging portion of the lift , the lift arm can be smoothly operated.

According to the second aspect, by arranging the plurality of engaging portions in parallel with the rotation axis of the lift arm, the force can be applied evenly over the entire rotation axis of the lift arm. It has features such as smooth rotation of the head and reliable escape of the head.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a cover, a slider, a holder, and a frame according to an embodiment of the present invention.

FIG. 3 is an assembly configuration diagram of a slider and a holder according to an embodiment of the present invention.

FIG. 4 is a configuration diagram of a frame according to an embodiment of the present invention.

FIG. 5 is an exploded perspective view of a latch mechanism according to an embodiment of the present invention.

FIG. 6 is a configuration diagram of a latch lever according to an embodiment of the present invention.

FIG. 7 is a configuration diagram of a slider according to an embodiment of the present invention.

FIG. 8 is a perspective view showing a state where a latch lever is attached to the top plate of the disc holder according to the embodiment of the present invention.

FIG. 9 is a perspective view showing a state in which a slider is attached above a latch lever according to an embodiment of the present invention.

FIG. 10 is a diagram showing a positional relationship between the disc holder and the slider in a state where the disc cartridge according to the embodiment of the present invention is ejected.

FIG. 11 is a diagram showing the positional relationship between the disc holder and the slider in the state where the disc cartridge of one embodiment of the present invention is mounted.

FIG. 12 is a configuration diagram of a lift arm according to an embodiment of the present invention.

FIG. 13 is a configuration diagram of a pressing spring according to an embodiment of the present invention.

FIG. 14 is an exploded perspective view of a lift arm, a pressing spring, and a disc holder according to an embodiment of the present invention.

FIG. 15 is a configuration diagram of a lifter according to an embodiment of the present invention.

FIG. 16 is an exploded perspective view of a lifter and a disc holder according to an embodiment of the present invention.

FIG. 17 is an operation explanatory view of the head arm lift mechanism of the embodiment of the present invention.

FIG. 18 is a configuration diagram of a conventional example.

[Explanation of symbols]

11 Disk device 12 holder 13 slider 14 frames 15 turntable 16,17 Magnetic head 18 head carriage 24 lead screw 25 drive motor 36 Latch mechanism 38 Latch lever 42 Lift arm 43 Lifter 44 Pressing spring 46 Cam part 47 Arc-shaped part 48 Runaway

Claims (2)

(57) [Claims] 1. A head for recording and reproducing information on a recording medium is brought close to the recording medium when the recording medium is mounted at a predetermined mounting position, and when the recording medium is separated from the predetermined mounting position, In a recording medium recording / reproducing apparatus for separating the head, the head is held, and a head arm for moving the head close to or away from the recording medium is rotatable about a rotation axis. Radius of
One end of the direction is engaged with the head arm,
A lift arm that rotates the head arm so as to move the head closer to and away from the recording medium by rotating about a shaft, and engages with the lift arm on the one end side of the lift arm. has an engagement portion that match, the rotation axis of the lift arm
It slid in a direction parallel to the recording medium recording and reproducing apparatus characterized in that it comprises a lifter rotating the lifting arm in accordance with the engagement state between the lift arm and the front Symbol engaging portion. Wherein said lifter is parallel to the front Symbol engaging portion rotation shaft of the lift arm, a plurality, a recording medium recording and reproducing apparatus according to claim 1, characterized in that it is arranged.