JPH08227562A - Magnetic disk driver - Google Patents

Abstract

PURPOSE: To make a magnetic disk driver thin by screwing a guide bar clamp for fixing a guide bar on the surface of a frame to a supporting body erected on the surface of the frame by a screw. CONSTITUTION: A guide bar clamp 18 is fixed to a frame 13 by inserting machine screw 19 through the side wall 131 of the frame 13 and screwing it to the female screw section 186b of a fixed section 186. In this case, in order to prevent a main body 185 from floating from the surface of the frame 13 by means of pressing it against the surface of the frame 13, a catch 137 is provided in the frame 13. By this constitution, protruding of the machine screw 19 for fixing the guide bar clamp 18 to the frame 13 from the back surface of the frame 13 is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk driver for driving a magnetic disk, and more particularly to a magnetic disk driver characterized by a structure around a guide bar for guiding a magnetic head in a predetermined direction.

[0002]

2. Description of the Related Art FIG. 4 shows the structure of a conventional magnetic disk driver. The magnetic disk driver is a device for driving a magnetic disk (not shown) such as a flexible disk. The magnetic disk is inserted into the magnetic disk driver from the direction shown by arrow A in FIG. The inserted magnetic disk is held by the disk table assembly 11 with their central axes aligned with each other. The disk table assembly 11 is rotatably supported on the surface of the frame 13 via a spring 12. The disk table assembly 11 is rotationally driven by a motor (not shown) provided on the back surface of the frame 13, and thereby the magnetic disk is rotated. Also, on the back surface of the frame 13,
A board (not shown) on which a large number of electronic components are mounted is attached.

The magnetic disk driver has a magnetic head 14 for reading / writing data from / to the magnetic disk. The magnetic head 14 is held by a head carriage 15. A combination of the magnetic head 14 and the head carriage 15 is called a carriage assembly.
The head carriage 15 is arranged on the surface of the frame 13 so as to be separated from the frame 13 as described later,
The magnetic head 14 is held so as to be movable with respect to the magnetic disk along a predetermined radial direction (direction shown by arrow B in FIG. 4).

The frame 13 has a side wall 131,
The stepping motor 16 is fixed to the side wall 131. The stepping motor 16 drives the head carriage 15 along a predetermined radial direction B. More specifically, the stepping motor 16 has a rotary shaft (drive shaft) 161 extending in parallel with a predetermined radial direction B, and the rotary shaft 161 is provided with a male screw. This rotating shaft 16
The front end 161a of No. 1 has a hole 132a formed in a bent portion 132 that is erected on the surface of the frame 13 by cutting and raising.
It is inserted into the steel ball 162 fitted in. By the hole 132a and the steel ball 162, the rotating shaft 1
61 is regulated so as to extend parallel to a predetermined radial direction B, and its tip 161a is rotatably held. On the other hand, the head carriage 15 is the head carriage body 15
an arm 151 extending from a to the rotating shaft 161;
The tip of the arm 151 is bent so that it fits into the trough of the male screw of the rotary shaft 161.
Have. Therefore, the rotary shaft 1 of the stepping motor 16
When 61 rotates, the hook 151 of this arm 151
a is moved along the portion of the valley of the male screw of the rotary shaft 161, so that the head carriage 15 itself moves along the predetermined radial direction B. In this way, the stepping motor 16 moves the head carriage 15 in the predetermined radial direction B
Acts as a drive means for moving along.

Since the rotary shaft 161 of the stepping motor 16 is provided on one side of the head carriage 15, one side of the head carriage 15 is provided on this rotary shaft 16.
It is movably supported in a state of being separated from the frame 13 by 1. However, only the support by the rotary shaft 161 is enough to cover the entire head carriage 15 in the frame 1.
It cannot be placed away from the surface of No. 3. Therefore, it is necessary to provide a guide for supporting the head carriage 15 on the other side of the head carriage 15. The guide bar 17 is used for guiding.
That is, the guide bar 17 is provided on the opposite side of the stepping motor 16 from the rotating shaft 161 with the head carriage 15 interposed therebetween. The guide bar 17 extends parallel to the predetermined radial direction B, is fixed to the surface of the frame 13 by a guide bar clamp 18 and a locking body described later, and moves the head carriage 15 along the predetermined radial direction B. invite. As a result, the entire head carriage 15 is arranged apart from the surface of the frame 13. A lead wire 15b extends from the head carriage 15 to the guide bar 17 side, and the lead wire 15b is electrically connected to a substrate mounted on the back surface of the frame 13.

The guide bar 17 is held on the surface of the frame 13 by a guide bar clamp 18 and a locking body. The guide bar clamp 18 is fixed to the surface of the frame 13 by binding machine screws 19. In the illustrated conventional example, the guide bar clamp 18 has a rectangular fixing member 180 that is slightly longer than the guide bar 17, and a hole for allowing the male screw portion 190 of the binding machine screw 19 to pass therethrough at approximately the center of the rectangular fixing member 180. 180a is vacant. One end 180b and the other end 180 of the rectangular fixing member 180
From c, a pair of arms 181 and 182 for holding one end 171 and the other end 172 of the guide bar 17 respectively.
Has been extended. Further, a locking piece 183 is provided on the edge of the rectangular fixing member 180 on the guide bar side. A locking body for sandwiching the guide bar 17 in cooperation with the locking piece 183 and locking the guide bar 17 on the surface of the frame 13 is provided on the surface of the frame 13.

As this locking body, conventionally, a frame 13 is used.
A pair of locking pieces 133 and 134 formed by cutting and raising a part of them on the surface side of the frame 13 are used.

The head carriage 15 has a support frame 152 for slidably supporting the head carriage body 15a along the guide bar 17.

[0009]

As described above, in the conventional magnetic disk driver, the guide bar clamp 18 is used.
Is fixed to the surface of the frame 13 by machine screws 19, but the tip of the machine screw 19 is configured so as not to project from the back surface of the frame 13. Therefore, in the prior art, in order to align the tip end surface of the machine screw 19 on the same plane as the back surface of the frame 13, the guide bar clamp 1
The concave portion 135 was formed on the back surface of the frame 13 by press molding in the portion of the frame 13 to which 8 was attached.
With this configuration, the mounting position of the machine screw 19 is shifted upward so that no protrusion is formed on the back surface of the frame 13.

However, since the concave portion 135 is formed by press molding, it is a convex portion when viewed from the front side of the frame 13, and the guide bar clamp 1 is formed on the convex portion.
8 will be fixed. Therefore, the conventional magnetic disk driver has a problem that it is difficult to reduce the thickness, which is a recent tendency.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a magnetic disk driver which is free from protrusions on the back surface of the frame and can be made thin.

[0012]

According to a first aspect of the present invention, there is provided a magnetic disk driver for driving a magnetic disk, the magnetic disk driver including a frame,
A magnetic head for reading / writing data from / to the magnetic disk and a magnetic head arranged on the surface of the frame and spaced from the frame, the magnetic head being arranged in a predetermined radial direction with respect to the magnetic disk. A head carriage that is movably held; a drive unit that is fixed to the frame and has a drive shaft that extends parallel to the predetermined radial direction; and a drive unit that moves the head carriage along the predetermined radial direction, A guide bar fixed on the surface of the frame so as to extend parallel to the predetermined radial direction and fixed on the surface of the frame, and a guide bar for guiding the head carriage along the predetermined radial direction. A guide bar clamp having a locking piece for locking the guide bar on the surface of the frame; and a guide bar clamp provided on the surface of the frame for cooperating with the locking piece. In the magnetic disk driver having a locking body that holds the guide bar on the surface of the frame, the guide bar clamp is screwed to a support body provided upright on the surface of the frame. A magnetic disk driver is obtained.

According to a second aspect of the present invention, there is provided the magnetic disk driver according to the first aspect, wherein the support is a side wall of the frame.

According to a third aspect of the present invention, the magnetic disk driver according to the first aspect is characterized in that the supporting body is a supporting piece formed by cutting and raising a part of the frame on the front side. Is obtained.

According to a fourth aspect of the present invention, the magnetic disk according to the first to third aspects is characterized in that the frame is provided with a hook for preventing the support from being lifted from the surface. You get a driver.

[0016]

In the case of the magnetic disk driver of the present invention, the guide bar clamp is fixed to the supporting member standing on the surface of the frame by machine screws, so that the tip of the machine screw should protrude to the back surface of the frame. In addition, there is no need for a recess on the back surface of the frame (projection when viewed from the front side of the frame) to align the tip surface of the machine screw on the same plane as the back surface of the frame, unlike in the conventional case. The disk driver can be thinned.

[0017]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a perspective view of an essential part of an embodiment of a magnetic disk driver of the present invention, FIG. 2 is a side view of the essential part of the magnetic disk driver shown in FIG. 1, and FIG. 3 is a line III--III of FIG. FIG.

Referring to FIGS. 1 to 3, the magnetic disk driver of this embodiment is the same as the magnetic disk driver shown in FIG. 4 except for the guide bar mounting structure. The same reference numerals as those of the magnetic disk driver shown in FIG.

In the case of this embodiment, the guide bar clamp 18
Is composed of a main body 185, a fixing portion 186, and a locking piece 187. The main body 185 is placed on the surface of the frame 13. The fixing portion 186 is integrally connected to one end of the main body 185 and extends in a direction perpendicular to the main body 185. The fixing portion 186 has a female screw portion 186a that is screwed with the machine screw 19.
Are formed. The locking pieces 187 are integrally provided on the guide bar side edge of the main body 185 and are inclined with respect to the surface of the frame 13.

This guide bar clamp 18 has a small screw 1
9 is inserted through the side wall 131 of the frame 13 to secure the fixing portion 18
It is fixed to the frame 13 by being screwed into the female screw portion 186 a of No. 6. At this time, the main body 185 is pressed against the surface of the frame 13 so that the main body 185 can
Hook 1 to prevent it from rising above the surface of the
37 is provided on the frame 13. This catch 13
7 is formed by cutting and raising a part of the frame 13 to the front side. The locking piece 187 of the guide bar clamp 18 fixed in this manner cooperates with a locking piece (an example of a locking body) 138 formed by cutting and raising a part of the frame 13 to the front side, One end of the bar 17 is pressed against the surface of the frame 13 and fixed on the surface of the frame 13.

In this embodiment, the guide bar clamp 18 is screwed to the side wall 131 of the frame 13, that is, in this embodiment, the side wall 131 is a support member for screwing the guide bar clamp 18. However, the present invention is not limited to this, and as a support, for example, the frame 1
It is also possible to use a support piece formed by cutting and raising a part of 3 to the front side and screw the guide bar clamp 18 to this support piece. Further, in the present embodiment, only the one end portion around the guide bar 17 is shown, but the other end portion of the guide bar 17 may be fixed by using the same one as the guide bar clamp 18, or, for example, shown. The two guide bar clamps 18 may be integrated and integrated, and both ends of the guide bar 17 may be fixed.

As described above, the guide bar clamp 18
Is fixed to the frame 13 with machine screws 19,
The tip of the machine screw 19 is attached to the side wall 131 of the frame 13.
Since it is formed so as to project inward, it does not become a factor that increases the height of the magnetic disk driver, and the magnetic disk driver can be thinned.

[0024]

According to the present invention, the machine screw for fixing the guide bar clamp to the frame does not project to the back surface of the frame, and for this reason, the position of the machine screw is increased as in the conventional case. Since it is not necessary to shift the magnetic disk driver, the magnetic disk driver can be made thinner than before.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of an embodiment of a magnetic disk driver of the present invention.

FIG. 2 is a side view of a main part of the magnetic disk driver shown in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an exploded perspective view of a conventional magnetic disk driver head.

[Explanation of symbols]

 13 frame 17 guide bar 18 guide bar clamp 19 machine screw 131 side wall (support) 185 main body 186 fixing part 186a female screw part 187 locking piece (locking body)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiaki Aboshi, No. 1-1 Bandai, Tendo City, Yamagata Prefecture, inside Neutronics Co., Ltd.

Claims (4)

[Claims] 1. A magnetic disk driver for driving a magnetic disk, the magnetic disk driver comprising a frame, a magnetic head for reading / writing data from / to the magnetic disk, and a surface of the frame. And a head carriage that is arranged apart from the frame and that holds the magnetic head movably along a predetermined radial direction with respect to the magnetic disk, and is fixed to the frame,
Drive means for moving the head carriage along the predetermined radial direction, the drive means having a drive shaft extending parallel to the predetermined radial direction, and extending parallel to the predetermined radial direction. A guide bar fixed on the surface of the frame for guiding the head carriage along the predetermined radial direction, and a lock fixed on the surface of the frame for locking the guide bar on the surface of the frame. A magnetic disk driver comprising: a guide bar clamp having a piece; and a locking body that is provided on the surface of the frame and that clamps the guide bar on the surface of the frame in cooperation with the locking piece. A magnetic disk driver, wherein a bar clamp is screwed to a support member provided upright on the surface of the frame. 2. The magnetic disk driver according to claim 1, wherein the support is a side wall of the frame. 3. The magnetic disk driver according to claim 1, wherein the support body is a support piece formed by cutting and raising a part of the frame on the front side. 4. The magnetic disk driver according to claim 1, wherein a hook is provided on the frame to prevent the support from being lifted from the surface.