JPS63152066A - Magnetic disk device - Google Patents

Abstract

PURPOSE:To precisely adjust the direction of a shaft by integrally forming the base placing the shaft for guiding a magnetic head carrier and a shaft pressing member. CONSTITUTION:The base stand 4 placing a shaft and the shaft pressing member 17 combining with the upper part of the base stand 14 at its both ends are integrally formed as a shaft fixing member. The pressing member 17 is not removed even if a screw 21 is loosened and a shaft 7 can be pressed continuously. And yet even if the loosening of the screw 21 be slight the whole shaft pressing member 17 is moved in the state of just as temporarily fixing the shaft 7 on the shaft pressing member 17 and the relative position to the base plate 5 of the shaft 7 can be changed. The fixing position of the shaft can thus be adjusted easily.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a magnetic disk device.

BACKGROUND OF THE INVENTION Magnetic disk drives are increasingly being used in personal computers and various types of equipment, and are becoming increasingly smaller and cheaper. One such means has been developed in which a spindle motor for rotating a magnetic disk, a stepping motor for moving a magnetic head gear rear, and a magnetic head carrier are mounted on a single base plate. In such a structure, it is necessary to fix the magnetic head carrier on the base plate in a slidable manner, and one of the simple ways to do this is to fix a shaft for guiding the magnetic head carrier on the base plate, There is a method in which a magnetic head carrier is slidably attached to this shaft. FIG. 3 shows the fixing member for fixing this shaft onto the base plate and its fixing form. In Fig. 3, 25 is a base plate;
26 is a shaft. 27 is a synthetic resin fixing base for fixing the shaft 26 in a predetermined position; 28 is a metal pressing plate for pressing the shaft 26 onto the fixing base 27; and 29 is a metal holding plate for pressing the shaft 26 onto the fixing base 27. These screws are used to press down and fix the entire body onto the base plate 25.

When assembling this device, the sliding direction of the magnetic head carrier will be corrected by the operator to the optimal direction. Therefore, when installing the fixing base 27, the mounting position of the fixing base 27 is adjusted so that the position can be slightly shifted. The holes for inserting screws are made somewhat larger. Additionally, the holes for screw insertion in the holding plate 28 are also formed to be larger accordingly.

Problems to be Solved by the Invention In the above configuration, even if the screw 29 is used to press down, the side of the holding plate 28 that contacts the shaft 26 tends to lift up, and the holding plate 28 does not touch the bottom surface of the head 30 of the screw 29. It is slightly tilted. To correct the sliding direction, it is necessary to slightly loosen the screw 29 and move the fixed base 27 together with the holding plate 28, but when the screw 29 is loosened, the angle between the lower surface of the head 30 and the holding plate 28 becomes even larger. In this case, it becomes difficult for the presser plate 28 to move relative to the fixed base 27. Therefore, there was a possibility that the presser plate 28 would slip on the fixing base 27 and separate from the shaft 26. In this case, the shaft 26 will wobble on the fixing base 27, making it impossible to accurately adjust the position of the magnetic head carrier slidably held on the shaft 26. It is also possible to embed the holding plate 28 in the fixed base 27 to prevent the position from shifting, but in this case, when the fixed base 27 is made by molding, the work of fitting the presser plate 28 into the mold becomes unnecessary. , which complicates the work and increases costs.

The present invention has been made in view of the above problems, and
It is an object of the present invention to provide a magnetic disk device which has a simple configuration and can very easily adjust the fixing position when fixing a shaft for guiding a magnetic head carrier onto a base plate.

Means for Solving the Problems In order to solve the above problems, the present invention integrally forms, as a shaft fixing member, a base on which the shaft is placed, and a shaft holding member that is connected to the upper part of the base at both ends. .

Effect With the above structure, even if the screw is loosened, the holding member will not come off or shift and will continue to hold the shaft.Furthermore, even if the screw is loosened slightly, the shaft can be held in place by the shaft holding member. The relative position of the shaft with respect to the base plate can be changed by moving the entire shaft holding member while it remains temporarily fixed on the top.

EXAMPLES The present invention will be described in detail below. In FIG. 2, 1 is a magnetic head carrier, and 2 is a magnetic head fixed to the magnetic head carrier 1. In FIG. Reference numeral 3 designates a spiral cam for moving the magnetic head carrier 1 by wire, and a connecting member of the magnetic head carrier 1 is fitted into its spiral groove.

4 is a rotating shaft of a motor for rotating the magnetic disk. 5 is a magnetic head carrier 1. Motor for rotating magnetic disks.

A base plate 6 that holds the motor for moving the magnetic head carrier and other parts is a case that covers the entire body. 7,8
1 is a stainless steel shaft that slidably holds the magnetic disk carrier 1, and 9 and 10 are fixing members that fix the shafts 7 and 8, respectively, on the base plate. The fixing member 9 is provided with shaft fixing parts 11, 12 at both ends, and a holding part 13 for suppressing shaft deflection in the center. On the other hand, the fixing member 10 also has a similar configuration.

Next, the configuration of the fixing part 9 will be explained based on FIG. In FIG. 1, 14 is a base having a concave cross section. 15 is a bottom surface of the shaft accommodating portion, and 16 is a side wall surface formed at right angles to the bottom surface 15. Reference numeral 17 denotes a shaft holding member provided above the shaft accommodating portion of the base 14 so as to span the shaft, and is molded integrally with the base 14. Reference numeral 18 denotes an inclined surface formed on the shaft holding member 17 so as to be inclined with respect to both the bottom surface 15 and the side wall surface 16 of the shaft accommodating portion. Reference numeral 19 indicates a hole for passing a fixing screw provided in the base 14, and numeral 20 indicates a hole for passing a fixing screw provided in the shaft holding member 17. The holes 19 and 20 are configured to be large enough to allow the main fixing member to be slightly shifted in position when being fixed onto the base plate 5. Reference numeral 21 denotes a screw for fixing the main fixing member onto the base plate 5, and the screw 21 is inserted into the hole 19, 20 and screwed into a screw hole provided in the base plate 5. By tightening the screw 21, the shaft holding member 17 is bent downward, and the inclined surface 18 of the shaft pressing member 17 comes into contact with the shaft 7, so that the shaft 7 is fixed. When the screws 21 are only lightly tightened, the shaft 7 is pressed against the bottom surface 15 and the side wall surface 16, positioned on the base 14, and temporarily fixed on the fixing member 9.

On the other hand, in this state, the fixing member 9 is not completely fixed, so it is possible to move the fixing member 9 somewhat on the base plate 5. As described above, since the shaft 7 is temporarily fixed on the fixing member 9, the shaft 7 can be moved by an amount corresponding to the direction of the fixing member 9. When assembling this magnetic disk device, the sliding direction of the magnetic head carrier 1 is adjusted with the screws 21 lightly tightened in this manner. After the adjustment is completed, screw 21
is completely tightened, the shaft 7 is completely fixed on the fixing member 9, and the fixing member 9 is completely fixed on the base plate. When the screw 21 is completely tightened, the shaft 7 is supported by the bottom surface 15 and the side wall surface 16 and does not move from the temporarily fixed position. There is no possibility that it will shift.

Effects of the Invention In the present invention, by integrally forming a base on which a magnetic head carrier guiding shaft is mounted and a shaft holding member connected to the base at both ends, the shaft fixing member can be attached to the base by loosening the fixing screw. Even if the shaft holding member is moved on the board, the shaft holding member will not deviate significantly from its predetermined position on the base, and when the shaft is temporarily fixed on the shaft fixing member without wobbling, the shaft holding member can be moved on the base plate to precisely adjust the direction of the shaft.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a fixing member for fixing a magnetic head carrier guide shaft of a magnetic disk device according to the present invention, FIG. 2 is a plan view of the same magnetic disk device, and FIG. 3 is a diagram of a conventional shaft fixing member. FIG. 1...Magnetic head carrier

Claims (1)

[Claims] It has a base plate, a magnetic head carrier disposed on the base plate, a shaft for guiding the magnetic head carrier, and a fixing member for fixing the shaft onto the base plate, and the shaft is attached to the fixing member. A holding member is formed integrally with the base to form a base on which the shaft is to be placed, and is coupled to the base at both ends, and is used for inserting fixing screws so as to face the shaft holding member and the base with a space between them, respectively. A magnetic disk device characterized by having holes.