JPS61182683A - Magnetic head supporting device - Google Patents

Abstract

PURPOSE:To reduce the contact pressure fluctuation of the magnetic head with respect to a recording medium easily and reliably by sticking a damper material to a supporting device. CONSTITUTION:The head 17 is attached to the supporting part 15c of a plate spring 15 such as the gimbal spring of a magnetic head moving member. The damper 19 such as foam material is stuck between the side wall of the arm 13 of a moved member and the upper surface of the supporting part 15c. The vibrations of the head 17 are absorbed by the damper 19 even when the vibrations are caused by vibration force such as the frictional force with the magnetic recording medium. Hence, fluctuations in the contact pressure of the magnetic head relative to the magnetic head can be easily and surely reduced to assure the stable recording and reproduction.

Description

[Detailed description of the invention] Industrial applications The present invention is a floppy disk drive device.

The present invention relates to a magnetic head support device used in fixed disk drives, tape drives, etc.

BACKGROUND OF THE INVENTION FIG. 3 shows a conventional magnetic head support device for a floppy disk drive.

In FIG. 3, reference numeral 1 denotes an L-shaped carriage, and this carriage 1 is slidably supported by a guide shaft 2. The carriage 1 is driven by a drive mechanism (7 not shown) consisting of a stepping motor or the like, and slides in the radial direction of the magnetic recording medium 3. An arm 4 is supported at one end of the carriage 1 via a leaf spring 5. A hole is formed at the tip of the arm 4, and a leaf spring 6 such as a gimbal spring is attached to the lower edge of the hole. There is. Reference numeral 7 denotes a magnetic head provided on the lower surface of the central movable portion of the leaf spring 6, and this magnetic head 7 comes into contact with the upper surface of the magnetic recording medium 3. 8 is a pressure spring that presses the arm 4 downward; 9
is a magnetic head fixed to the other end of the carriage 1,
This magnetic head 9 contacts the lower surface of the magnetic recording medium 3.

The magnetic recording medium 3 is rotationally driven by a motor (not shown).

FIG. 4 shows the structure of the tip of the arm 4. As shown in FIG. 1
0 is a protrusion formed in the hole at the tip of the arm 4, and the tip of the protrusion 10 is in contact with the center of the upper surface of the leaf spring 6. 11 is a viscoelastic body attached to the contact portion between the protruding piece 10 and the plate spring 6, and 12 is a viscoelastic body attached to the plate spring 6.

Problems to be Solved by the Invention However, in the conventional example described above, the plate spring 6 is
There is also the problem that the magnetic head 7 vibrates and the contact pressure of the magnetic head 7 with the medium fluctuates, making recording or reading of information unstable.

The present invention solves the above problems of the conventional magnetic head support device, and provides a magnetic head support device that can damp vibrations of the magnetic head and perform stable recording or reading.

Means for Solving the Problems In order to solve the above-mentioned conventional problems, the present invention provides a damper material on a leaf spring (or a moving body such as an arm) that supports a magnetic head, and uses this damper material on the arm or the like. It contacts or adheres to the moving body (or leaf spring).

According to the present invention, with the above-described configuration, the vibration force generated by friction between the magnetic recording medium and the magnetic head is damped by the damper material, vibration of the magnetic head is suppressed, and stable recording and reading can be performed.

Example FIG. 1 shows the configuration of an embodiment of the present invention.

In FIG. 1, 13 is an arm, and this arm 13
A square hole 14 is formed at the tip.

Further, the lower surface of the tip end of the arm 13 is inclined.

Reference numeral 15 denotes a plate spring whose one end is attached to the edge of the square hole 14 of the arm 10 with a screw 16.

The leaf spring 15 consists of a frame 15a, a head support part 15c connected to the inside of the frame 15a by a connecting part 15b, and a protrusion 15d formed on the outer periphery of the frame 15a. A hole 15e head is formed in the hole 15d. 17 is the plate spring 15≧γ holding portion 15
This is a magnetic head supported on the bottom surface of c.

A screw 18 is inserted into the hole 15e of the leaf spring 5 and screwed onto the arm 13, and this screw 18 restricts the downward displacement of the tip of the leaf spring 15.

Reference numeral 19 denotes a damper material made of an elastic foam material or the like. is in contact with the inner wall surface of the square hole 14 of the arm 13. Note that in FIG. 1, the arrow indicates the direction of movement of the magnetic recording medium, and the damper material 19 is placed at a portion of the head support portion 15c that vibrates most, that is, on the inflow side of the magnetic recording medium of the head support portion 15c. It is glued.

In this embodiment, when recording or reading information by bringing the magnetic head 17 into contact with a rotating magnetic recording medium, the magnetic head 17 vibrates due to an excitation force caused by friction between the magnetic recording medium and the magnetic head 17. This vibration is absorbed by the damper material 19.

In the above embodiment, the damper material 19 is provided only on the magnetic recording medium inflow side of the head support portion 15c of the leaf spring 15, but the damper material 19 is also provided on other sides of the head support portion 15c or the frame portion 15a. Glue the material 19 and make the square hole 14.
The damper material 1 may be contacted with or adhered to the hole edge of the damper material 1.
The side surface of the damper material 1 is glued to the edge of the square hole 14.
9 may be brought into contact with the head support portion 15c. Further, the damper material 19 is attached to the head support portion 15c,
Alternatively, it may be attached to the hole wall of the square hole 14 using a fixture without adhesive.

FIG. 2 shows another embodiment of the invention. In FIG. 2, 13 is an arm, 14 is a square hole formed at the tip of the arm 13, and 20 is a leaf spring whose outer periphery is attached to the edge of the lower surface of the square hole 14. , C-shaped slit) 20a.

20b, 20c, and 20d are formed. 17 is a magnetic head provided on the lower surface of the center of the leaf spring 20;

Reference numeral 21 denotes a protruding piece formed integrally with the arm 13, and this protruding piece 21 contacts the center of the leaf spring 20.

Reference numeral 19 denotes a damper material, and the lower surface of the damper material I9 is adhered to the head support portion 20e of the leaf spring 20, and the side surface of the damper material 19 is in contact with or adhered to the hole wall of the hole I4. In this embodiment as well, the vibration of the magnetic head 17 is damped as in the previous embodiment.

In the above embodiment, a foamed material having elasticity is used as the damper material 19, but other material such as a material having a large internal mechanical loss or a fibrous material having a large surface friction may also be used.

Further, although the above embodiment is an example in which a damper material is provided in the magnetic head support mechanism on the arm side, it may be similarly adopted in the magnetic head support mechanism in which the magnetic head on the carriage side is supported by a spring material. be.

Effects of the Invention According to the present invention, vibrations of the magnetic head caused by friction between the magnetic recording medium and the magnetic head are absorbed by the damper material, so there is an advantage that the magnetic head can stably contact the magnetic recording medium.

[Brief explanation of the drawing]

FIG. 1 is a cutaway perspective view of a part of a magnetic head support device according to an embodiment of the present invention, FIG. 2 is a top view of main parts of another embodiment of the present invention, and FIG. 3 is a conventional FIG. 4 is a side view of the magnetic head support device of FIG. 13... Arm, 14... Square hole, 15... Leaf spring, 17... Magnetic head, 19... Damper material, 20
...Plate spring, 20a, 20b, 20c, 20d-xlit.

Claims (1)

[Claims] A moving body that moves parallel to the surface of a magnetic recording medium, a plate spring such as a gimbal spring attached to this moving body, a magnetic head supported by a head support portion of this plate spring, and the moving body or the above. A magnetic head support device comprising: a damper material attached to a head support portion by adhesive or the like, and a portion of which is in contact with or adhered to the head support portion or the movable body.