JPH0351817Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a head mechanism for a flexible magnetic disk device that brings a magnetic head into contact with and separates from the magnetic surface of a flexible magnetic disk.

Prior Art A conventional head mechanism 1 is shown in FIGS. 4 and 5, for example.
As shown in the figure, the base 4 supports the fixed head 2 and is rotatably supported via a leaf spring 5 on the wall 4a of the base 4, which slides in the directions of arrows X ₁ and X ₂ guided by the guide rail 3. The structure was such that a rotating plate 7 was provided with a head 6. Therefore, when the magnetic disk 8 is attached to the magnetic head mechanism 1, the movable plate 9 moves in the direction of the arrow.
The rotating plate 7 is displaced in _one direction (arrow _A ) and clamps the magnetic disk 8, and is energized by the torsion spring 10 and the leaf spring 5, which attempts to return to its original linear shape. 8, and when ejecting the magnetic disk 8, the movable plate 9 is displaced in the direction of arrow _Y2 , and the rotating plate 7
The head 6 is separated from the magnetic disk 8 by pressing the protruding piece 7a of the head 6 along with the rotary plate 7 which rotates in the direction of arrow _A2 .

Problems to be solved by the invention As shown in FIG.
Since the head 6 is moved in the direction away from the fixed head 2 by rotating in _two directions A, space is required for the upper tip 7b to move in _{the two} directions of arrow Y by rotating the rotating plate 7. The drawback was that it was difficult to make the device thinner.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a head mechanism that eliminates the above-mentioned drawbacks.

Means and Effects for Solving the Problems The present invention provides a head mechanism for a flexible magnetic disk device that brings a magnetic head into contact with and separates from the magnetic surface of a flexible magnetic disk. A head support having a rotatable roller at an end opposite to the magnetic head; a rotating member on which the head support is supported; and a rotating member on which the rotating member is supported and the roller is constantly rolling. and a base having a guide surface, and when the magnetic head comes into contact with and separates from the magnetic disk by rotation of the rotating member with respect to the base, the roller is guided by the guide surface and moves toward the head. The support rotates with respect to the rotating member, so that the head support moves in a substantially parallel state.

Embodiment FIGS. 1 and 3 show an embodiment of the head mechanism according to the present invention. In FIG. 1, the head mechanism 11 includes a head support 13 which supports the head 6 and has a rotatable roller 12 at the end opposite to the head 6, and when the head 6 is brought into contact with or separated from the magnetic disk 8. A rotating member 14 that rotates and supports the head support 13 at its rotating end 14a, a base 15 that supports the rotating member 14 and has a guide surface 15a that causes the roller 12 to roll, and the head support 13 as shown by the arrows. It is generally composed of a plate spring 16 that biases the roller 12 in the _Y1 direction and biases the roller 12 against the guide surface 15a.

As shown in FIGS. 2 and 3, the head support 1
3 is a head 2 fixed on the lower surface side of the head support part 13a.
It supports the head 6 facing the. Further, the head support body 13 is moved from the head support portion 13a by the arrow
An arm portion 13b extending horizontally in the _X2 direction and an arm portion 1
It has a shaft portion 13c that protrudes outward from both sides of the shaft portion 3b.

A bifurcated cylindrical portion 13d, 1 is provided at the tip of the arm portion 13b.
3e is provided, and the roller 12 is attached to this cylindrical portion 13.
d and 13e, and the cylindrical portions 13d, 13
The shaft 1 inserted and fitted into the center holes 13d ₁ and 13e ₁ of e
It is rotatably supported by 7.

As shown in FIG. 2, the rotating member 14 has a substantially H-shape, with rotating arms 14b and 14c extending along opposite sides of the head support 13 and separated from each other.
and 14c, and a connecting portion 14d that connects the rotating arm portions 14b and 14c by horizontally extending the upper portions of the rotating arm portions 14b and 14c. Note that the connecting portion 14d is connected to the arm portion 13 of the head support 13.
It does not come into contact with b and is separated from it.

In addition, the holes 14 at the ends of the rotating arms 14b and 14c
b ₁ and 14c ₁ have holes 15 in the wall 15b of the base 15.
The shaft 19 inserted through c is fitted. Therefore, the rotating member 14 is rotatably supported by the shaft 19. Furthermore, U-shaped grooves 14e and 14f are formed in the rotating ends 14a of the rotating arms 14b and 14c, and the shaft portion 13c of the head support 13 is fitted into the grooves 14d and 14e.

The rotating member 14 protrudes to the side of the rotating arm 14b and has a protruding piece 14g facing the end 9a of the movable plate 9.
has. Therefore, before the magnetic disk 8 is attached, the protruding piece 14f is pressed against the end 9a of the movable plate 9 which is displaced in _{the two} directions of the arrow Y, and the rotating member 14 is rotated in _{the two} directions of the arrow A. There is.

Further, by rotating the rotating member 14 in the direction of arrow _A2 , the head support 13 is displaced in the direction of arrow _Y2 in a substantially horizontal state via the shaft portion 13c that engages with the grooves 14e and 14f.

The base 15 has an arc-shaped guide surface 15a that guides the rolling of the roller 12 provided on the front side of the wall portion 15b and restricts the movement of the head support 13.
and insertion holes 15b and 15e through which the guide rail 3 on the base 20 is inserted.

Note that the guide surface 15a is formed in an arc shape having substantially the same radius as the locus of the shaft portion 13c as the rotating member 14 rotates.

As shown in FIG. 1, the leaf spring 16 is a substantially W-shaped flat plate, and a central portion 16c connecting the inner flexible portions 16a and 16b is connected to the arm portion 13b of the head support 13.
The bent portion 16f, which is fitted into the lower surface side recess and fixed by adhesive, and is bent so as to connect the outer flexible portions 16d and 16e, is connected to the wall portion 15b of the base 15.
It is fixed to the rear side with screws. Therefore, when the rotating member 14 rotates in the ₂ directions of arrow A and displaces the head support 13 in the ₂ directions of arrow Y, the leaf spring 16 moves from the inner flexible portion 16 which was on the same plane.
a, 16b and outer flexible parts 16d, 16e are the third
As shown in the figure, it is elastically bent and opened, and its elastic force urges the head support 13 in the direction of arrow _Y1 , and also presses and urges the roller 12 against the guide surface 15a.

When the magnetic disk 8 is installed in the device, the movable plate 9 moves along the arrow Y ₁ as the connecting members 21 on both sides rotate.
The magnetic disk 8 inserted between the movable plate 9 and the base 20 by being displaced in the direction is clamped. Movable plate 9
Due to this displacement, the rotation member 14 is released from the restriction of the protruding piece 14g. Therefore, due to the engagement of the shaft portion 13c of the head support 13, which is displaced in the direction of arrow _Y1 due to the elastic force of the leaf spring 16 to return to its original flat plate shape, with the grooves 14e, 14f of the rotation end 14a, The rotating member 14 rotates in the direction of arrow _A1 .

As the rotating member 14 rotates, the head support 13
is displaced in the direction of arrow _Y1 , but since the roller 12 at the tip of the arm portion 13b rolls on the guide surface 15a, which has approximately the same shape as the rotation locus of the shaft portion 13c, while being pressed by the leaf spring 16 without any rotation loss, the roller 12 moves horizontally. Move almost parallel in this state.

Therefore, the head 6 is in a substantially horizontal state as shown by the arrow.
It is displaced together with the head support 13 which is displaced in the _Y1 direction, and comes into contact with the magnetic surface of the magnetic disk 8 in a substantially perpendicular direction, so that the contact with the magnetic surface is good.

As the head support 13 is displaced in the direction of arrow _Y1 , the rotating member 14 rotates in the direction of arrow _A1 to gradually reduce the inclination angle, and when the head 6 comes into contact with the magnetic disk 8, it is approximately horizontal. In this state, it forms a substantially straight line with the head support 13.

Further, the fixed head 2 and the head 6 are operated by a motor 2.
2, the steel belt 24 whose both ends are fixed to the base 15 is wound up via the pulley 23, and the arrows X ₁ and X ₂ are rotated according to the rotation angle of the motor 22.
record or playback by moving in the direction.

Also, when ejecting the magnetic disk 8,
The operation is the opposite of that when it is attached. Therefore, when the movable plate 9 is displaced in the _two directions of arrow Y to release the clamp on the magnetic disk 8, the end 9a of the movable plate 9
comes into contact with the protruding piece 14g of the rotating member 14 and rotates the rotating member 14 in the direction of arrow _A2 . Rotating member 1
4, the head support 13 is moved by the leaf spring 16.
is displaced in the _two directions of arrow Y against the repulsive force of.

Note that the head support 13 is moved substantially parallel in the direction of the arrow _Y2 while remaining horizontal due to the roller 12 rolling on the guide surface 15a, as in the case of the above-mentioned movement.
The position shown in FIG. 3 is reached.

Therefore, when the head 6 is separated from the magnetic disk 8, the head support 13 is moved away from the rotating member 14.
Since it is sufficient to have the space necessary for the head 6 to be spaced apart from the magnetic disk 8 without protruding beyond the rotation end 14a of the magnetic disk 8, the height of the device can be reduced accordingly, and the device can be made thinner.

Effects of the Invention As described above, the head mechanism according to the present invention rotatably supports the head support at the rotating end of the rotating member, and moves the head support in a substantially parallel state. moving the head support the distance necessary to separate the head from the magnetic disk;
It is possible to reduce the thickness of the device by not protruding beyond the rotating end of the rotating member, and by setting the moving space of the head support to the minimum necessary.Moreover, the head can be moved in a direction approximately perpendicular to the magnetic surface. Since the head is brought into contact with or separated from the magnetic disk, it is advantageous for stably recording and reproducing the head in contact with the magnetic surface, and also because of variations in the dimensional accuracy of each member Even if the position of the moving shaft deviates in the height direction, the contact of the head with the magnetic surface can be maintained in a stable state. Further, the roller provided at the end of the head support having the magnetic head rolls on the guide surface of the base to stably and smoothly move the head support in parallel.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an embodiment of the head mechanism according to the present invention, FIGS. 2 and 3 are a plan view and a side view showing the mechanism according to the present invention together with a flexible magnetic disk device,
4 and 5 are a plan view and a side view for explaining a conventional head mechanism. 1, 11...Head mechanism, 2...Fixed head,
3... Guide rail, 4, 15... Base, 5...
Leaf spring, 6... Head, 7... Rotating plate, 8... Magnetic disk, 9... Movable plate, 10... Torsion spring, 12... Roller, 13... Head support,
14... Rotating member, 16... Leaf spring, 17, 19
... Axis, 20 ... Base.

Claims (1)

[Claims for Utility Model Registration] In a head mechanism of a flexible magnetic disk device that brings a magnetic head into contact with and separates from the magnetic surface of a flexible magnetic disk, a The head support has a rotatable roller at its end, a rotating member on which the head support is supported, and a guide surface on which the rotating member is supported and on which the roller is constantly rolled. and a base, and when the magnetic head comes into contact with and separates from the magnetic disk due to the rotation of the rotation member relative to the base, the roller is guided by the guide surface and the head support is guided by the rotation. A head mechanism that rotates relative to a member and moves the head support in a substantially parallel state.