JPH01224980A - Head guiding mechanism for magnetic memory - Google Patents

Abstract

PURPOSE:To attain an accurate and stable forward and backward movement by making the length direction of a plate spring loosened and folded back at its center parallel to the driving direction of a magnetic head, respectively fixing both edges of the plate spring to a fixed block and a movable block, and guiding the movable block in the driving direction of the magnetic head by a fluctuation at the folded back part of the plate spring. CONSTITUTION:A plate spring 13 having a prescribed length, which is loosened and folded back at its center, is arranged under a state in which the length direction of the plate spring 13 is made parallel to the driving direction of the magnetic head, and both edges of the plate spring 13 are respectively fixed to a fixed block 12 and a movable block 11. Thereafter, the movable block 12 is guided in the driving direction of the magnetic head by the fluctuation at the folded back part of the plate spring 13. Thus, since only a mechanical load occurs due to a deflective fluctuation at the plate spring 13, and no friction occurs, spatial backlash in a driving part can be eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a support and guide mechanism for a movable portion of a head carriage in a fixed magnetic disk device or a floppy disk device.

BACKGROUND OF THE INVENTION Conventionally, the helad carriage of a magnetic storage device as described above is configured to move in one direction using a combination of a sliding bearing and a guide shaft, a rolling bearing and a guide shaft, or a guide plate. Therefore, a certain amount of allowance, or play, was required in the direction perpendicular to the direction of movement.

Problems to be Solved by the Invention Therefore, according to the above-mentioned head carriage guide mechanism, lateral wobbling occurs depending on the play, and it is also possible to reduce the play in an attempt to prevent such lateral wobbling. This caused problems as friction occurred and movement became slow.

SUMMARY OF THE INVENTION The present invention aims to provide a magnetic head guide mechanism for a head carriage that has virtually no play, has extremely low frictional force, and has an excellent guiding effect without lateral runout.

Means for Solving the Problems In order to achieve the above objects, the present invention has a movable block that supports a magnetic head, a fixed block provided on the side of the movable block, and a predetermined block folded back with slack at the center. At least one leaf spring having a length of A head guide mechanism for a magnetic storage device is configured, characterized in that the movable block is guided in the driving direction of the magnetic head by the movement of a folded portion.

Operation According to the above configuration, since the mechanism of the present invention does not include a sliding part, only mechanical load is generated due to deflection fluctuations of the leaf spring, and no friction is generated. Play can be virtually eliminated. Therefore, in a movable head magnetic storage device, it is possible to exhibit an access action that realizes high-speed response with high accuracy.

Embodiment FIG. 1 shows the basic principle of the present invention, (11)
A movable block corresponding to the Herad carriage, (12)
is a fixed block fixed on the side of this movable block, and (13) is a leaf spring made of a suitable elastic material and has a predetermined length, with both halves folded back with some slack. They are opposed to each other, and their respective ends are fixed to opposite side surfaces of the movable block (11) and the fixed block (12).In this case, the folded portion (13a) of the leaf spring (13) is connected to the block (11), ( 12) A movable block (
11) allows forward and backward movement.

Fig. 2 shows an example in which the principle of the guide mechanism explained in Fig. 1 is applied to four locations.
) and (15) are fixed between the movable block 21) and the fixed block shown on the left side thereof, and each folded portion protrudes from the rear end and front end of the blocks (21) and (22), respectively. Similarly, the leaf springs (16) and (17) are fixed between the movable block ('21) and the fixed block (23) shown on the right side of the movable block ('21), and each folded portion is connected to the block (21), (23), respectively. It protrudes from the rear and front ends. A head support (
A magnetic head (25) is fixed to the tip of the support (24).

According to the configuration shown in FIG. 2 above, the movable block (21) is supported between the fixed blocks (22) and (23) by the leaf springs (14) to (17) at the front and rear parts of both sides thereof. Therefore, due to the balance of their spring support forces, it is possible to move linearly only in the direction of the reciprocating arrow A, that is, only in the driving direction of the magnetic head, and this movement is only affected by an elastic load. Since there are no sliding parts, extremely accurate and stable back and forth movement is possible.

Figure 3 omits one of the both-side guide mechanisms shown in Figure 2,
Opposing the fixed block (33) only on the other side;
A leaf spring (34) similar to the leaf springs (16) and (17) above.
and (35). According to this embodiment, a one-turn belt transmission mechanism is provided on the side where the leaf spring guide mechanism is omitted. This is a suitable drive box (
36) Protrude the rotational drive shaft (37) upward from above,
The winding fixed to this has an end, and each tip of a pair of steel leaf springs (38) and (39) that extend in the front and back direction in the same plane after going around this axis in opposite directions. They are fixed to the front and rear ends of the side surfaces of the movable block (31), respectively. According to this embodiment, in order to further prevent lateral movement of the movable block (31), at least one leaf spring (16
), (17) are provided, and the other end of the leaf spring (40) is fixed to an appropriate fixing means, although not shown in the drawing.

In the embodiment shown in FIG. 3 above, the pair of leaf springs (38) and (39) wound around the drive shaft (37) constitute an elastic single-wound drive belt, and as the drive shaft (37) rotates, one of the leaf springs (38) and (39) rotates. The movable block (31) is driven in the head driving direction when the other end is wound and the other end is released, and at the same time it also somewhat functions as a guide plate spring.

Effects of the Invention As described above, the present invention improves positional accuracy by using a support and guide mechanism with extremely low mechanical friction and high rigidity in the direction perpendicular to the head driving direction for the helad carriage of a magnetic storage device. High memory access can be achieved. Furthermore, since there are no sliding parts, it has the excellent effect of producing very little noise.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the basic principle of the present invention, Figures 2 and 3 are diagrams showing the basic principle of the present invention.
This figure is a perspective view showing an embodiment of a head carriage guide mechanism employing the principle shown in FIG. 1. (11)・・・・・・・・・・・・・・・Movable block (12)・・・・・・・・・・・・・・・
Fixed block (13)・・・・・・・・・・・・・・・
・・・Plate spring (13a)・・・・・・・・・・・・・・・
...Folded part (14) to <17)...Plate spring (21)...Moveable block (22), ( 23)・・・・・・Fixed block (24)・・・・・・・・・・・・・・・・・・
・Support (25)・・・・・・・・・・・・・・・・・・
・Magnetic head (33)・・・・・・・・・・・・・・・
...Movable blocks (34), (35)...
・・Plate spring (36)・・・・・・・・・・・・・・・・
・・Drive source (37)・・・・・・・・・・・・・・・・
・・Drive shaft (38), (40)・・・・・・・・・Plate spring Figure 1 Figure 2 Figure 3 No. 7

Claims (1)

[Claims] A movable block supporting a magnetic head, a fixed block provided on the side of the movable block, and at least one leaf spring having a predetermined length folded back with a slack in the center are arranged in the longitudinal direction and in the above-mentioned direction. By arranging the magnetic head in parallel with the driving direction of the magnetic head and fixing both ends to the fixed block and the movable block, respectively, the movable block is guided in the driving direction of the magnetic head by the movement of the folded portion. A head guide mechanism for a magnetic storage device, characterized in that: