JP2599165Y2 - Head feed mechanism of magnetic 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 magnetic recording / reproducing apparatus using a magnetic disk as a recording medium, and more particularly to a head feed mechanism of the magnetic recording / reproducing apparatus.

[0002]

2. Description of the Related Art As is well known, in a magnetic recording / reproducing apparatus using a so-called "3.5 inch" floppy disk as a recording medium, a head feed mechanism as shown in FIGS. 4 to 6 is used. The symbol “1A” indicates the magnetic disk holder 2
The "0" side carriage 1A is a "0" side carriage guided along a guide rod 4A of the apparatus frame 3A extending in a direction parallel to the slot 2a of the "A".
Is formed as a rigid member by pressing a thin metal plate into a shallow dish shape.

The "0" side carriage 1A
A flexible leaf spring 6 is cantilevered to a base 1a via a spacer 5 by a mounting bracket 7A and a fixing screw 8A, and a free end 6a of the leaf spring 6 is also thin metal. The base 9a of the "1" side carriage 9A, which is pressed from a plate as a rigid member, is supported by mounting screws 10. Also, the mounting ear 7a of the mounting bracket 7A.
The support rod 11 is fixed to the support rod 11, and an urging spring 12A for pressing the "1" side carriage 9A toward the opening edge 2b of the magnetic disk holder 2A is attached to the support rod 11.

The "0" side carriage 1A and "0"
The "0" side magnetic head 15A and the "1" side magnetic head 16A are fixed to the surface near the tip of the 1 "side carriage 9A via gimbals 13A and 14A made of a flexible thin metal plate. "0"
Side magnetic head 15A and "1" side magnetic head 1
By 6A, information is recorded / reproduced on the surface of a magnetic disk (not shown).

Further, the "0" side carriage 1A
The feed motor 17 is provided on the surface of the device frame 3A adjacent to the
A is installed, and a feed screw 18A of the feed motor 17A extending in a direction parallel to the guide rod 4A is fixed to an extension 1b of the "0" side carriage 1A by using a holding plate 19 and a screw 20. The parallel pin 21 is engaged, and the rotation of the feed screw 18A causes the “0”
Side carriage 1A and "1" side carriage 9A
Is sent in the radial direction of the magnetic disk.

[0006]

The "1" side carriage 9 of the head feed mechanism in the conventional magnetic recording / reproducing apparatus.
A is fixed to the "0" side carriage 1A via the leaf spring 6 as described above.
Since it is necessary to use not only the leaf springs 6 but also the spacers 5 and the mounting screws 10, the number of parts is large, the assembling process thereof is complicated, and the reduction of the manufacturing cost has its own limit. An object of the present invention is to provide a head feeding mechanism of a magnetic recording / reproducing apparatus which has a small number of parts and simplifies an assembling process in view of the problems of the conventional head feeding mechanism as described above.

[0007]

In order to achieve this object, the present invention provides a magnetic disk in which a "0" side magnetic head is mounted on the tip surface and a magnetic disk is loaded by guide means provided on an apparatus frame. A "0" side carriage fed in the length direction of the slot of the holder, and a "1" side magnetic head mounted on the surface facing the "0" side magnetic head and having a base at the base of the "0" side carriage. "1" which is flexibly supported and driven in the opening edge direction of the slot by the urging of the urging spring.
In a head feed mechanism of a magnetic recording / reproducing apparatus including a side carriage, the "1" side carriage is thin.
Pressed as a rigid member with a metal plate
And the peripheral wall at the tip is bent into an L-shaped cross section.
An embossed part is formed on the surface of the tip, and the embossed part is
The “1” side magnetic head is attached via
Is, the "1" to the base of the side carriage the "0" and fixed to the side carriage by fixing screws, to the base side of the portion to be smaller than the section modulus of the section modulus other part of the portion of the base portion toward The present invention proposes a head feed mechanism of a magnetic recording / reproducing apparatus, which is provided with flexibility.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an embodiment of the present invention; FIG. The resin-molded “0” side carriage 1 integrally molded with a pedestal-shaped base has a driven portion 1 c at the lower portion of the intermediate portion, and the driven portion 1 c is moved in a direction parallel to the slot 2 a of the magnetic disk holder 2. It is guided along the guide rod 4 of the device frame 3 to be extended.

The base 1a of the "0" side carriage 1
A support pin 22 capable of supporting the biasing spring 12 described in detail later is integrally formed on the back surface of the first member. Since this support pin 22 extends in a direction parallel to the guide rod 4, the insertion of the coil portion 12a of the biasing spring 12 from its tip only causes the biasing spring 12 to move to the "0" side carriage 1. Can be fixed to the base 1a. In the center of the tip of the “0” side carriage 1, a thin portion 1 d which is made flexible by sufficiently reducing the thickness is formed, and is seated on the surface of the thin portion 1 d. "Side Magnetic Head 1
The fifth connection pin 15a is fixed to the flexible printed circuit board 23 with solder while sandwiching the thin portion 1d.

The base 1a of the "1" side carriage 9, which is pressed as a rigid member from a thin metal plate, is attached to the base 1a of the "0" side carriage 1 in the same manner as in the prior art. Fixed directly at 8. That is, the "1" side carriage 9 is formed as a rigid member by bending a peripheral wall 9c at an intermediate portion and a distal end portion into an "L" cross section, and forms an embossed portion 9d on the distal end surface. A "1" side magnetic head 16 is attached to the embossed portion 9d via a gimbal 14. A pair of driven ears 9b are cut and raised on a peripheral wall 9c at an intermediate portion of the "1" side carriage 9, and these driven ears 9b are brought into contact with an opening edge 2b of a slot 2a of the magnetic disk holder 2. .

Referring to FIG. 3, "0" side carriage 1
As for the mounting relationship between the "1" side carriage 9 and the "1" side carriage 9, the above-mentioned peripheral wall 9c is not formed on the base 9a of the "1" side carriage 9, and the fixing screw 8 is provided on the surface thereof.
Since the through hole 24 into which the screw portion of the side carriage 9 can be inserted is formed, the fixing is performed with the base 9a of the "1" side carriage 9 interposed between the base 1a of the "0" side carriage 1 and the mounting bracket 7. By tightening the screw 8, the base 9a of the "1" side carriage 9 can be firmly fixed to the base 1a of the "0" side carriage 1.

Further, a "U" -shaped cutout 25 is formed in a portion 9e near the base of the "1" side carriage 9, so that the sectional modulus of the portion 9e near the base is changed by the cutout 25. Is smaller than the part. For this reason, the portion 9e near the base has sufficient flexibility,
A state is obtained in which the tip of the 1 "side carriage 9 is flexibly supported by the base of the" 0 "side carriage 1.

Although the fixed end 12b of the biasing spring 12 in which the coil portion 12a is supported by the support pin 22 is locked to the back of the base 1a, the biasing end 1 of the biasing spring 12 is
2c is a "1" side carriage 9 as shown in FIG.
As a result, the driven ear 9b of the "1" side carriage 9 is driven by the opening edge 2b of the magnetic disk holder 2 by the force of the biasing spring 12.

Further, a feed motor 17 is provided on the surface of the apparatus frame 3 adjacent to the "0" side carriage 1, and a feed screw 18 of the feed motor 17 extending in a direction parallel to the guide rod 4 is provided. The driven protrusion 26 of the extension 1b integrally molded with the side of the "0" side carriage 1 is engaged, and the "0" side carriage 1 and the "1" side carriage are rotated by the rotation of the feed screw 18. 9 is sent in the radial direction of the magnetic disk.

Since the head feed mechanism according to the illustrated embodiment has the above-described structure, when a floppy disk (not shown) is inserted into the magnetic disk holder 2, the opening / closing mechanism attached to the magnetic disk holder 2 is provided. Releases the shutter of the floppy disk, but when the floppy disk is completely loaded into the magnetic disk holder 2, the magnetic disk holder 2 is lowered to the lower side in FIG. Therefore, as the magnetic disk holder 2 moves down, the force of the urging spring 12 causes the "1" side carriage 9 to move.
Are tilted toward the magnetic disk holder 2, and the “0” side magnetic head 15 and the “1” side magnetic head 16 supported by the “0” side carriage 1 and the “1” side carriage 9 are on both surfaces of the magnetic disk. The recording medium is resiliently contacted and information is recorded and reproduced on the surface of the magnetic disk by the activation of the feed motor 17.

In the head feed mechanism, "0" is fixed only by fixing the base 9a of the "1" side carriage 9 to the base 1a of the "0" side carriage 1 using the fixing screw 8 and the mounting bracket 7. With side carriage 1 "
Since the assembly with the 1 "side carriage 9 can be completed, a simple structure of the assembly process with a reduced number of parts can be obtained.

The urging spring 12 is attached to a support pin 22 integrally formed with the “0” side carriage 1 by a coil portion 12.
a, and fixed in advance to “0” side carriage 1 ”
Since the assembly is performed by merely applying the urging end 12c of the urging spring 12 to the surface of the 1 "side carriage 9, the assembling process is simple and the structure is inexpensive.

[0018]

As is apparent from the above description, according to the present invention, the section modulus of the portion near the base of the "1" side carriage is reduced, and the base of the "1" side carriage is set to "0". Since it is fixed to the base of the side carriage, the conventional plate spring and mounting screws are omitted, so that the cost of parts can be reduced and the labor of the assembly process can be saved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a head feed mechanism according to the present invention with a magnetic disk holder removed.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is an exploded perspective view showing a relationship between a “0” side carriage and a “1” side carriage of the head feed mechanism.

FIG. 4 is a perspective view of a conventional head feed mechanism without a magnetic disk holder.

FIG. 5 is a sectional view taken along line 5-5 in FIG. 4;

FIG. 6 is an exploded perspective view showing a relationship between a “0” side carriage and a “1” side carriage of the head feed mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 "0" side carriage 2 Magnetic disk holder 2a Slot 2b Opening edge 8 Fixing screw 9 "1" Side carriage 9a Base 9b Follower ear 9e Part near base 12 Bias spring 15 "0" side magnetic head 16 "1" side Magnetic head

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-2855061 (JP, A) JP-A-63-191384 (JP, A) Japanese Utility Model Sho 62-150760 (JP, U) Japanese Utility Model Sho 62- 202667 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) G11B 17/32 G11B 21/16

Claims (1)

(57) [Scope of request for utility model registration] 1. A "0" side carriage which has a "0" side magnetic head mounted on the front end surface thereof and is fed in a length direction of a slot of a magnetic disk holder in which a magnetic disk is loaded by guide means provided on an apparatus frame. The "1" side magnetic head is mounted on the surface facing the "0" side magnetic head, and the base is flexibly supported by the base of the "0" side carriage and biased by a biasing spring. In a head feed mechanism of a magnetic recording / reproducing apparatus having a "1" side carriage driven by a slot opening direction, the "1" side carriage is made of a thin metal.
Pressed as a rigid member on a plate,
The peripheral wall at the end is bent into an L-shaped cross section,
An embossed part is formed on the surface, and a gimbal is
The "1" side magnetic head is mounted via the "1" side carriage, and the base of the "1" side carriage is fixed to the "0" side carriage by a fixing screw. A head feeding mechanism for a magnetic recording / reproducing apparatus, wherein flexibility is given to a portion near a base by making the coefficient smaller than a coefficient.