JP3216362B2 - Guide shaft support mechanism and disk 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 guide shaft support mechanism for supporting a guide shaft for guiding a head carriage in a disk device such as a micro floppy disk device (MFDD) or an optical disk device. The present invention relates to a used disk device.

[0002]

2. Description of the Related Art Conventionally, in a micro floppy disk drive (MFDD), a guide shaft for guiding a head carriage to which a magnetic head is fixed in a radial direction of a floppy disk mounted on a disk rotating portion and moving the head carriage is provided. ing. The guide shaft is supported by the chassis using a mechanism as shown in FIGS. FIG.
In the mechanism shown in (a) and (b), two flat head screws 2
2 is screwed to the chassis 23, and both ends of the guide shaft 21 are pressed against the engaging portions 23 </ b> A of the chassis 23 by the heads of the flathead screws 22, thereby supporting and fixing the guide shaft 21.

In the support mechanism shown in FIGS. 5 (a) and 5 (b), two leaf springs 25 are respectively attached to a chassis 23 with screws 24, and both ends of the guide shaft 21 are respectively attached to the ends of the leaf springs 25. Engagement part 23B of chassis 23
And the guide shaft 21 is supported and fixed.

In the support mechanism shown in FIGS. 6 (a) and 6 (b), two leaf springs 25 spaced from each other are integrally formed by a connecting portion 26, and the central portion of the connecting portion 26 is formed by one piece. The guide shaft 21 is attached to the chassis 23 by screws 24, and both ends of the guide shaft 21 are pressed against the engaging portions 23 </ b> B of the chassis 23 at the distal ends of the two leaf springs 25 to support and fix the guide shaft 21.

[0005]

According to the guide shaft support mechanism shown in FIG. 4 described above, since it is pressed by two flat head screws 22, the workability is good at low cost.
The pressing force changes depending on the tightening condition of 2, and it is difficult to press the guide shaft 21 with a uniform pressing force.

According to the guide shaft support mechanism shown in FIG.
Since the two leaf springs 25 and the screws 24 are used, the reliability at the time of fixing increases, but there is a problem that the cost is increased and the workability is poor.

According to the guide shaft holding structure shown in FIG.
Since the plate spring 25 and the single screw 24 having a single structure are used, the cost is not so large, and the reliability and workability at the time of fixing are improved.

As described above, from the viewpoint of cost, reliability, and workability, the guide shaft holding structure shown in FIG. 6 is the most excellent.

By the way, in order to meet the demand for thinner and smaller disk devices, disk devices have been made thinner.
In order to reduce the size, it is necessary to reduce the thickness of the leaf spring,
Therefore, in practice, the two leaf springs 25 and 2 shown in FIG.
The fact is that a method using a book screw 24 is adopted. Therefore, the cost of the structure for holding the guide shaft is increased, and the workability is poor. Therefore, some improvement has been desired.

[0010] The present invention has been made in view of the above circumstances, and an object of the present invention is to make it possible to reduce the thickness and size.
An object of the present invention is to provide a guide shaft holding structure capable of reducing costs and improving workability and reliability.

[0011]

To achieve the above object, a guide shaft support mechanism according to the present invention comprises: a guide shaft for guiding the movement of a head carriage holding a head portion;
A mounting portion formed so as to protrude from the chassis and provided on one side of the upper surface side with supporting surfaces substantially orthogonal to each other for supporting both ends of the guide shaft, and a positioning protrusion protruding from the upper surface of the mounting portion An elongated hole having a major axis extending in the direction of extension of the guide shaft, and a mounting piece having a screw insertion hole formed therein, and the support surface of the mounting portion projecting from the mounting piece. Mounting support portions provided with pressing support pieces for pressing both end portions of the guide shaft are provided at both end portions of the connecting portion, and at least a part of the connecting portion corresponds to a rising surface formed on the mounting portion. A holding member provided with a contacting piece that is in contact with the holding member. Here, the guide shaft is
Both ends are supported by the support surface provided on the mounting portion, and the pressing member contacts the contact surface with the rising surface, and engages the elongated hole with the positioning protrusion, and By extending a pressing support piece on the guide shaft supported by the support surface, and fixing the mounting piece to the mounting portion via a fixing screw inserted into the screw insertion hole, The guide shaft is positioned and supported on the mounting portion by pressing both ends of the support surface against the support surface.

The supporting surface provided on the mounting portion has a mounting surface on which the guide shaft is mounted, and a side surface of the guide shaft which stands up from the mounting surface and is mounted on the mounting surface. The guide shaft has a contactable upright surface, and the guide shaft is pressed against the boundary between the mounting surface and the upright surface by the pressing support piece of the pressing member.

[0013] Further, the pressing support piece of the pressing member is opposed to an extending portion extending on the guide shaft and a boundary portion between the mounting surface and the upright surface from an end of the extending portion. The guide shaft is bent so as to contact the guide shaft and press the guide shaft against the boundary.

Further, the present invention is a disk device having a guide shaft support mechanism for supporting a guide shaft for guiding the movement of a head carriage holding a head portion. The guide shaft support mechanism provided in the disk device is , With the configuration as described above.

[0015]

The guide shaft is mounted on the support surface on the mounting portion provided on the chassis side, the pressing member is mounted on the mounting portion, and the pressing member is positioned on the mounting portion by the positioning projection and the positioning long hole. And attached to the mounting part with screws. Thereby, both ends of the guide shaft are pressed and supported on the support surface of the mounting portion by the pressing support pieces of the pressing member.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A guide shaft support mechanism according to the present invention and a disk device provided with the guide shaft support mechanism will be described below with reference to the drawings.

In the following description, a case where the present invention is applied to a micro floppy disk device (MFDD) will be described.

FIGS. 1A and 1B are a plan view and a front view of a structure for holding a guide shaft, and FIGS. 2A and 2B are a plan view and a front view of a base provided on a chassis. , FIG.
(A), (b), (c) has shown the top view, front view, and side view of a holding member, respectively.

The chassis S of the micro floppy disk drive (MFDD) to which the present invention is applied is provided with a rotating unit for rotating the floppy disk, and a guide shaft 1 is provided along the radial direction of the rotating unit. , Guide shaft 1
Has a structure in which an engaging portion 2a of a head carriage 2 is slidably inserted, and the head carriage 2 is guided by a guide shaft 1 and can move in a radial direction of a floppy disk mounted on the rotating portion. ing.

As shown in FIGS. 1A and 1B, the guide shaft 1 is formed in a solid rod shape having a circular cross section.

The chassis S is provided with a pedestal 3 constituting a mounting portion for a guide shaft. The guide shaft 1 is supported by a support portion 4 provided on the upper surface side of the pedestal 3 and having substantially orthogonal support surfaces. The support member 4 is pressed and supported by the member 5.

The pedestal 3 has a length substantially equal to that of the guide shaft 1, as shown in FIGS. 2 (a) and 2 (b). The pedestal 3 has an upper surface portion 301 and an intermediate surface portion 305 continuous with the upper surface portion 301 via a rising surface portion 303.

The support portions 4 of the guide shafts 1 provided at both ends of the pedestal 3 are connected to an intermediate surface 30 near both ends in the longitudinal direction of the pedestal 3.
5, mounting surfaces 401 forming the support surfaces of the guide shafts 1 formed horizontally on the mounting surface 5, and upright surfaces 40 rising from the ends of the mounting surfaces 401 and also forming the support surfaces of the guide shafts 1.
3 is comprised.

Further, a columnar boss 311 and a columnar positioning projection 313 are provided at positions near both ends of the upper surface 301 of the pedestal 3, and a screw hole 315 is formed in the boss 311. .

As shown in FIGS. 3 (a), 3 (b) and 3 (c), a pressing member 5 for pressing and supporting both ends of the guide shaft 1 on a supporting portion 4 is provided in the longitudinal direction of the pedestal 3, that is, the pedestal. Connecting portion 50 extending in the extension direction of guide shaft 1 supported on
1 and the mounting support portions 503 are provided at both ends of the connecting portion 501.
Is provided.

At both ends of the connecting portion 501 constituting the holding member 5, the upper surface portion 3 near both ends in the longitudinal direction of the pedestal 3 is provided.
A mounting piece 501A that forms a mounting support portion 503 that is mounted and supported on the upper surface portion 301 located on the upper surface 01 is formed. When the holding member 5 is attached to the pedestal 3, the connecting portion 501 has a rising surface 303 on the pedestal 3 side.
And a contact piece 501B bent and formed so as to be parallel to the rising surface portion 303 contacting the contact piece 501B.

Each mounting piece 501A constituting the holding member 5
A screw insertion hole 505 is formed at a position corresponding to the screw hole 315 provided on the pedestal 3 side.
13 is formed with a positioning long hole 507 extending in the longitudinal direction of the connecting portion 501 with a width through which the positioning projection 313 is inserted, and a bent piece 509 on one side of the mounting piece 501A. Are formed.

The mounting support section 503 is a pressing support piece 503A extending slightly upward from the mounting piece 501A.
And a tip 503B extending obliquely downward from the end of the pressing support piece 503A. As shown in FIG. 1, each mounting support portion 503 is provided with a positioning projection 31.
3 is inserted into the positioning slot 507, and the mounting piece 501 </ b> A of the holding member 5 is placed on the upper surface 301 of the pedestal 3.
1 is screwed into the screw hole 315 and the holding member 5 is fixed to the pedestal 3, the leading end 503 </ b> B of the mounting support portion 503 elastically contacts both ends of the guide shaft 1 on the support portion 4, and
Are pressed diagonally from above on the boundary between the mounting surface 401 and the upright surface 403.

Next, a case where the guide shaft 1 is supported on the pedestal 3 by using the holding member 5 formed as described above will be described.

First, the guide shaft 1 is mounted on the support portion 4 of the pedestal 3, the mounting piece 501 A of the holding member 5 is mounted on the upper surface portion 301 of the pedestal 3, and the positioning projection 313 is inserted into the positioning long hole 507. Let it. In this state, the holding member 5 is moved in the longitudinal direction to adjust the positions of the screw insertion holes 505 and the screw holes 315, and the fixing screw 11 is screwed into the screw holes 315 through the screw insertion holes 505 to fix both ends of the holding member 5. Screw 1
1 and the upper surface of the boss portion 311.

As a result, both ends of the guide shaft 1 on the support portion 4 are connected to the mounting surface 4 by the front end 503B of the mounting support portion 503.
It is pressed and fixed to the boundary portion between the first surface 01 and the upright surface 403 from obliquely above.

Therefore, since the guide shaft 1 can be fixed with a uniform pressing force, the reliability can be improved.
The mounting support portions 503 are integrally connected to form one component, and the positioning projections 313 and the positioning long holes 50 are formed.
7 facilitates the positioning, so that the mounting workability is improved, the cost can be reduced, and the disk device can be made thinner and smaller.

Further, when the holding member 5 is placed on the pedestal 3, the contact piece 501B is attached to the rising surface 3 on the pedestal 3 side.
03, it is possible to position the guide shaft 1 in a direction orthogonal to the extension direction, so that the positioning projection 313 and the positioning long hole 507 are engaged, and the screw insertion hole 505 and the screw hole 315 are formed. Is easier to align.

[0034]

As described above, the holding members supporting both ends of the guide shaft supported on the mounting portion constituting the present invention are engaged with the positioning projections projecting from the upper surface of the mounting portion of the guide shaft. A long hole having a long diameter in the extension direction of the guide shaft to be drilled and having a mounting piece with a screw insertion hole drilled therein,
Attachment support portions are provided at both ends of the connection portion, the attachment support portions being provided from the attachment piece and provided with pressing support pieces for pressing both ends of the guide shaft on the support surface of the attachment portion, respectively, and the attachment portion is provided on at least a part of the connection portion. The contact shaft is provided with an abutment piece that contacts the rising surface formed on the guide shaft, so that the guide shaft can be pressed with a uniform pressing force, thereby improving the reliability of the support of the guide shaft. it can.

Further, the holding member is formed as a single component by connecting and integrating the mounting support portions at both ends by connecting portions, and furthermore, in a direction perpendicular to the direction in which the position of the guide shaft in the extending direction with respect to the mounting portion is adjusted. Since it has a contact part as a means for positioning, not only can it be easily mounted on the mounting part while pressing and supporting the guide shaft, but also parts management becomes easy and further mounting Work can be facilitated.

Further, since the pressing member can be formed by a plate-shaped member, it is possible to cope with the thinning and miniaturization of the disk device using the present invention.

[Brief description of the drawings]

FIG. 1 shows a guide shaft support mechanism according to the present invention, and (a)
Is a plan view, and (b) is a front view.

2A and 2B show a pedestal constituting a guide shaft support mechanism according to the present invention, wherein FIG. 2A is a plan view and FIG. 2B is a front view.

3A and 3B show a pressing member constituting the guide shaft support mechanism according to the present invention, wherein FIG. 3A is a plan view, FIG. 3B is a front view, and FIG. 3C is a side view.

FIG. 4 is a plan view and a front sectional view showing a conventional guide shaft holding mechanism.

FIG. 5 is a plan view showing another conventional id shaft holding mechanism;
It is a front sectional view.

FIGS. 6A and 6B are a plan view and a front sectional view showing still another conventional guide shaft pressing mechanism.

[Explanation of symbols]

1 guide shaft, 2 head carriage, 3 pedestal,
Reference Signs List 4 support part, 5 holding member, 313 positioning projection, 501 connecting part, 501B contact piece, mounting support part, 507 positioning long hole

Claims (4)

(57) [Claims] 1. A guide shaft for guiding the movement of a head carriage holding a head portion, and a guide shaft projecting from a chassis, and being substantially orthogonal to each other and supporting both ends of the guide shaft on one side of an upper surface side. A mounting portion provided with a support surface, and a long hole having a major axis extending in the extension direction of the guide shaft that engages with a positioning projection protruding from an upper surface of the mounting portion is formed, and a screw insertion hole is formed. The mounting support portion has a mounting piece provided with pressing support pieces that are provided protruding from the mounting piece and press the both ends of the guide shaft on the support surface of the mounting section, respectively. A holding member provided with a contact piece that abuts on a rising surface formed on the mounting portion on at least a part of the connecting portion; and the guide shaft has both ends provided on the mounting portion. Supported by the support surface The pressing member makes the contact surface abut on the rising surface, engages the elongated hole with the positioning projection, and holds the pressing support piece on the guide shaft supported by the support surface. And fixing the mounting piece to the mounting portion via a fixing screw inserted into the screw insertion hole, thereby pressing and supporting both ends of the guide shaft on the support surface, respectively. A guide support mechanism, wherein the guide support mechanism is positioned and supported on the mounting portion. 2. The support surface is capable of abutting on a mounting surface on which the guide shaft is mounted, and on a side portion of the guide shaft which stands on the mounting surface and is mounted on the mounting surface. Having an upright surface,
The guide shaft support mechanism according to claim 1, wherein the guide shaft is pressed against a boundary between the mounting surface and the upright surface by the pressing support piece of the pressing member. 3. The pressing support piece of the pressing member opposes an extending portion extending on the guide shaft, and a boundary portion between the mounting surface and the upright surface from an end of the extending portion. The guide shaft support mechanism according to claim 1, further comprising a tip portion bent so as to make contact with the guide shaft to press the guide shaft against the boundary. 4. A disk drive comprising a guide shaft support mechanism for supporting a guide shaft for guiding the movement of a head carriage holding a head portion, wherein the guide shaft support mechanism comprises a head carriage holding the head portion. A mounting shaft formed to protrude from the chassis, and provided on one side of the upper surface side with supporting surfaces that are substantially orthogonal to each other and support both ends of the guiding shaft; An elongated hole having a major axis extending in the extension direction of the guide shaft, which engages with a positioning projection protruding from the upper surface of the guide hole, is provided, and a mounting piece having a screw insertion hole formed therein is provided. Attachment support portions are provided at both end portions of the connection portion, wherein the attachment support portions are provided on the support surface of the attachment portion, and press support pieces for pressing both end portions of the guide shaft are provided. A holding member provided with a contact piece that comes into contact with a rising surface formed on the mounting portion, wherein the guide shaft has both ends supported by the support surface provided on the mounting portion, and The member makes the contact surface abut on the rising surface, engages the elongated hole with the positioning projection, and extends the pressing support piece on the guide shaft supported by the support surface, By fixing the mounting piece to the mounting portion via a fixing screw inserted into the screw insertion hole, both ends of the guide shaft are pressed and supported on the support surface, and the guide shaft is mounted on the mounting portion. A disk drive characterized in that the disk drive is positioned and supported.