JP2551713Y2 - Magnetic head mounting mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a magnetic head mounting mechanism. In particular, it relates to a magnetic head mounting mechanism for a double-sided magnetic recording / reproducing apparatus.

[Conventional technology]

With the rapid development of OA equipment, the reduction in size and size of portable equipment is progressing on an hourly basis. Magnetic recording and playback devices (hereinafter FD) used in word processors and laptop computers
Abbreviated as D. It goes without saying that the challenge of lighter, smaller, and smaller is being developed.

A conventional example of a thin FDD will be described in detail with reference to FIGS.

FIG. 6 is an explanatory view showing a configuration at the time of unloading when the cartridge 6 containing the floppy disk is inserted into the FDD.

In the figure, 1 is a carriage, 2 is a guide rail, and the guide rail 2 is fixed to a frame (not shown). Reference numeral 3 denotes an arm rotatably supported by the carriage 1. Reference numeral 4 denotes a magnetic head held at the tip of the arm 3 via a gimbal spring 20. Reference numeral 5 denotes a magnetic head held by the carriage 1 via a gimbal spring (not shown). Reference numeral 8 denotes a cartridge in which the floppy disk 7 is housed, and 8 denotes a cover for protecting the carriage device 10 sliding on the guide rail 2.

As shown in the drawing, a cartridge 6 can be inserted and removed between the upper and lower magnetic heads 4 and 5, and a gap H2 between the upper surface of the cartridge and the cover 8 is provided. There are two gaps so as not to contact the sliding of the device 10.

Although not shown, the configuration at the time of FDD read / write, that is, at the time of loading, will be described with reference to a part of FIG.

The cartridge 6 falls directly below the carriage 1 so that the magnetic head 5 and the floppy disk 7 come into contact with each other. Further, the arm 3 is closed and the magnetic head 4 is moved to the floppy disk 7.
And the upper and lower magnetic heads 4 and 5 clamp the floppy disk 7.

The magnetic heads 4 and 5 contacting the upper and lower surfaces of the rotating floppy disk 7 are clamped by the carriage 1 and the arm 3 and move in the axial direction of the guide rail 2. During this time, magnetic information is exchanged between the magnetic heads 4 and 5 and the floppy disk 7 to perform read / write.

[Problems to be solved by the invention]

In the above-described configuration, efforts have been made to reduce the thickness of the cartridge to the allowable limit with respect to the gap between the cartridge and the magnetic head, the gap between the arm and the cover, and the like.

However, the conventional configuration cannot reduce the weight and thickness.

The purpose of the present invention is a new configuration that is not
An object of the present invention is to provide a handy and easy-to-use magnetic recording / reproducing apparatus for OA equipment by realizing a light weight.

[Means for solving the problem]

The present invention took the following measures to realize thinner and lighter OA equipment. That is, a carriage slidably provided in a radial direction of a magnetic disk by a guide rail fixed to a frame, an arm rotatably supported by the carriage, and a magnetic head supported by the arm via a gimbal. The arm has two projections forming a concave portion at its tip, and the gimbal spring has an inner frame to which the magnetic head is fixed, and a gimbal spring connected to the inner frame by a first support shaft. A gimbal spring is mounted on the protrusion of the arm in a magnetic disk drive including a frame and a mounting portion connected to the middle frame and the second support shaft, and the gimbal spring is fixed to the protrusion of the arm by the mounting portion. In this state, a part of the middle frame was made to protrude toward the arm tip from the tip of the arm projection.

[Action]

In the present invention, the middle frame is located on the tip side of the arm with respect to the protrusion (arrow X).
(In the opposite direction to the arm), the arm's length in the longitudinal direction is shortened. The turning radius can be reduced, and the device can be made thin.
Furthermore, according to such a configuration, the gimbal spring can be positively brought into contact with the cover 8, in which case the device can be made thinner, and the arm is fixed in the unload position. In addition, the impact resistance can be absorbed by the elasticity of the gimbal spring, and the impact resistance of the device can be improved.

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an explanatory view showing the configuration of the embodiment of the present invention, showing a state in which the cartridge 6 is inserted and an unloading state.

FIG. 2 is an explanatory view showing the configuration of the embodiment of the present invention, in which the arm 3 is closed, and the floppy disk 7 is clamped by the magnetic heads 4 and 5 to allow reading / writing.

Although the conventional example has been described in detail with reference to FIGS. 6 to 8, the same parts and the same numbers will not be described repeatedly and will be omitted in the following description.

In FIG. 1, the arm 3 is configured to be shorter than the conventional one, and about half of the gimbal spring 20 extends from the tip of the arm 3 and is attached. The spacer 26 is fixed to the tip of the gimbal spring 20 and contacts the lower surface of the cover 8. I have.

A cartridge 6 containing a floppy disk 7 is disposed in a gap between the upper and lower magnetic heads 4 and 5 so as to be insertable and removable. The gap between the cartridge 6 and the cover 8 is indicated by H1,
In the gap H1, there is one gap where the upper surface of the cartridge 6 does not contact the upper magnetic head 4.

From the unloading state shown in FIG. 1, the cartridge 6 moves immediately below and the floppy disk 7
And the arm 3 is closed, and the upper and lower magnetic heads 4,
5 clamps the floppy disk 7 and enters the loading state.

FIG. 2 is an explanatory diagram showing a configuration during loading.
The carriage 1 driven by a skip motor rotates the floppy disk 7 by a motor (not shown).
Is guided by the guide rail 2 and reciprocates in its axial direction to seek a desired track position. Read / write is performed by exchanging magnetic information between each magnetic head and the floppy disk 7.

3 to 5 are an explanatory view and a perspective view illustrating a magnetic head mounting mechanism of the present embodiment.

Protrusions 31, 32 are formed at the tip of the arm 3, and a U-shaped concave portion 33 is formed.

The gimbal spring 20 is fixed at the periphery of the concave portion 33 of the arm 3.

 The gimbal spring 20 includes the following parts.

21 is an attachment portion, 22 is a middle frame, 23 is an inner frame, 24 is a middle frame support portion (hereinafter abbreviated as Y-axis bridge), 25 is an inner frame support portion (hereinafter abbreviated as X-axis bridge), 26 is a spacer It is.

Arrows shown in FIG. 5 indicate the X axis and the Y axis, and the inner frame is formed around the axis passing through the X axis bridge 25 and the Y axis bridge 24.
23, the middle frame 22 rotates, and a known gimbal action is possible.

On the other hand, in the conventional gimbal spring, as shown in FIG. 7, the mounting portion 21 wraps around the entire periphery of the middle frame 22 and supports the middle frame 22 with only the Y-axis bridge 24.

The gimbal spring 20 of this embodiment has a shape in which one side of the mounting portion 21 is cut off at the boundary of the Y-axis bridge, and the middle frame 22 extends from the tip of the arm 3 to be a free end.

A base 26 is fixed to the free end of the middle frame 22, which is a free end.

The magnetic head 4 is fixed to the inner frame 23 as in the conventional example.

The mounting portion 21 is fixed around the concave portion 33 of the arm 3 and is mounted so as not to interfere with the gimbal action of the inner frame 23 of the middle frame 22.

Therefore, the operation of the magnetic head at the time of loading shown in FIG. 2 receives the wave of the floppy disk 7 and performs a rotational movement about the X axis and the Y axis, just like the conventional example.

FIG. 3 is an enlarged explanatory view of the arm tip portion of FIG. 1, and shows the configuration of the gimbal spring 20 and the magnetic head when the arm is opened.

The spacer 26 is fixed to the free end of the inner frame 22 and contacts the lower surface of the cover 8, and a space is secured so that the arm tip or a wiring member (not shown) on the back of the magnetic head does not contact the cover 8. doing. It is also a point of application of a force for rotating the middle frame 22 about the Y-axis bridge 24.

The position of the magnetic head 4 shown in FIG.
On the other hand, the position of the magnetic head 4 in this embodiment is arranged horizontally since the Y-axis bridge 24 is twisted and the middle frame 22 is kept almost horizontal.

[Effect of the invention]

As is clear from the above description, according to the present invention, the length of the arm in the longitudinal direction is shortened, so that the cover can be arranged low even if the arm is rotated to a predetermined unload position, and the device can be made thin. Has an effect. According to such a configuration, it is also possible to make the gimbal spring positively abut on the cover, in which case the device can be made even thinner, and the arm is fixed in the unload position, The elasticity of the gimbal spring also has the effect of absorbing shocks and improving the shock resistance of the device.

[Brief description of the drawings]

FIG. 1 is an explanatory view of the embodiment of the FDD of the present invention at the time of unloading, and FIG. 2 is an explanatory view of the embodiment of the FDD of the present invention at the time of loading. 3 is an enlarged explanatory view of the arm tip shown in FIG. 1, and FIGS. 4 and 5 are perspective views of the arm tip shown in FIG. 2 as viewed from above and below. FIG. 6 is an explanatory view at the time of unloading of the conventional FDD,
FIG. 7 and FIG. 8 are perspective views of the front end of the arm of the conventional FDD viewed from above and below. 1 ... carriage, 2 ... guide rail, 3 ... arm, 4, 5 ... magnetic head, 20 ... gimbal spring.

Claims (1)

(57) [Scope of request for utility model registration] 1. A carriage slidably provided in a radial direction of a magnetic disk by a guide rail fixed to a frame, an arm rotatably supported by the carriage, and supported by the arm via a gimbal. The arm has two projections forming a concave portion at the tip thereof, and the gimbal spring has an inner frame to which the magnetic head is fixed,
The inner frame includes a middle frame connected by a first support shaft, and a mounting portion connected to the middle frame by a second support shaft, wherein the gimbal spring is fixed to the protrusion of the arm by the mounting portion. A magnetic head mounting mechanism in a disk drive, wherein a part of a middle frame protrudes from a tip end of a projection of an arm toward a tip end of the arm with a gimbal spring attached to a projection of the arm.