JPS62229568A - Head supporting mechanism for floppy disk drive - Google Patents

Abstract

PURPOSE:To facilitate the adjustment of the initial position of an arm by providing a pressing tongue on an arm spring and providing an adjusting member on a carriage main body so as to adjust the pressing position between the adjusting member and the pressing tongue. CONSTITUTION:The arm spring 28 has an arm fixed part 28a fitted to an arm body 24 and has a depressing tongue 28b prolonged to the opposite side to the arm fixed part 28a. Carriage fixed parts 28c, 28d are fixed to the carriage main body to a retaining plate 36 by screws 38, 40. The tip of the screw 42 of the adjusting member is pressed onto the upper face of the tongue 28b while the screw is screwed to the retaining plate 36, the pressing tongue 28b is displaced by a prescribed amount to deliver the displacement force to the arm spring 28. Thus, the standstill position of the arm 24 is decided to a prescribed value. Thus, the initial position of the arm is facilitated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a head support mechanism of a 70 disk drive;
In particular, it relates to improvements in the double-sided head support mechanism.

[Prior Art] Magnetically reading desired data onto the surface of a flexible floppy disk that is rotated at a constant speed/J1 included tal
Floppy disk drives are well known and are widely used as external storage devices for computers and the like.

As is well known, the surface of a floppy disk is coated with a magnetic thin film that enables magnetic recording.Recently, the double-sided recording method became common for floppy disks in India to increase the recording density on one disk. ICK Wl is widely used in 1-copy disk drives, which have magnetic heads arranged on both sides of a floppy disk.

The double-sided head follows the rotational surface displacement of the 70° disc.
Minimize the off-track liS by radially displacing both heads in the radial direction.
As an improved device for this purpose, a system has been proposed in which an arm body consisting of an upper arm and a lower arm is fixed to a carriage body using a single arm spring, as shown in FIG.

In FIG. 3, the carriage body 10 is connected to the guide rail 1.
2 by a stepping motor (not shown), and the feeding direction is set in the radial direction of the 70-tip disk 14.

The upper head 1 is in close contact with both sides of the floppy disk 14.
6 and the lower head 18 are respectively fixed to the upper arm 20 and the lower arm 22, and both arms 20 and 22 integrally form an arm body 24.

In the embodiment, the upper arm 20 supports the floppy disk 14.
The upper head 16 is pivotally engaged with the lower arm 22 by a spring 26 in order to move the upper head 16 to the H1 position.

The arm body 24 formed as described above is attached to the Killeridge body 10 by one arm spring 28.
As a result, both heads 16 and 18 are capable of following the rotational center of the floppy disk 14, that is, movement in the seven directions shown in the figure. Since this is carried out by displacement, both heads 16, 18 have the advantage that the radial movement, or off-track movement, of the disk 14 can be suppressed to a very small value.

FIG. 4 has a configuration similar to that of FIG. 3, and corresponding members are given the same reference numerals and explanations will be omitted.

What is distinctive about FIG. 4 is that the arm spring 28
It is fixed to the carriage body 10 by extending in the opposite direction to that shown in the figure, and as a result, in FIG.
The center of gravity of the cantilevered arm shown in the figure can be set close to the fulcrum.

In other words, the cantilevered structure in Figure 3 has the disadvantage that its center of gravity is far away from the fulcrum, making it vulnerable to vibrations applied from the outside, but in Figure 4, the center of gravity and the fulcrum are This has the advantage of improving earthquake resistance by placing the ground in close proximity.

[Problems to be Solved by the Invention] However, in any of the above-mentioned proposed devices, both heads 16 and 18 easily follow the Z-axis displacement of the 70-tube disc 14, and the off-me Although there is an advantage that the rank suspension can be reduced, there is a problem that initial positioning of the arm body 24 is extremely troublesome.

That is, in the apparatus shown in FIGS. 3 and 4, the arm body 24
The initial position, that is, the rest position is the shape of the arm spring 28,
It is determined by parallelism or flatness, and adjusting this requires a great deal of effort or skill during assembly.

In particular, the position of the arm body 24, that is, the head 16, 18, is directly related to the penetration of the device, and its adjustment is small and essential in order to determine the basic performance of the floppy disk drive, and conventionally, the adjustment was extremely troublesome. There was a problem with this.

The present invention was made in view of the above-mentioned conventional problems, and its purpose is to simultaneously support both arms with arm springs.
While taking advantage of the advantage of making the off-track product smaller while following the Z@displacement of the 0-tsupi disk, we also provide an improved head support structure that allows easy adjustment of the initial position of the arm body (static 1st position). It's about doing.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a pressing tongue piece extending in the opposite direction to the arm fixing portion for fixing the arm body to the arm spring, and a pressing tongue piece provided on the carriage body. [Embodiment] The rest position of the arm body can be arbitrarily adjusted by pressing the pressed adjustment member against the pressing tongue piece and changing the pressing position. [Example] The following is based on the drawing. A preferred embodiment of the present invention will be described.

FIG. 1 shows a preferred embodiment of the present invention, and similarly to FIG. 3, the arm body 24 is connected to the carriage body 10 by the arm spring
8 and is supported in a cantilevered manner in one direction.

In the embodiment, the arm body 24 has an upper arm 20.degree. and a lower arm 22, with each arm 20, 22 having an upper head 16. The lower head 18 is fixed with at least one side gimbal supported.

The upper arm 20 and the lower arm 22 are separably fixed to each other by a leaf spring 26, and for this reason, in the embodiment,
One end of the leaf spring 26 is fixed to the upper arm 20, and the other end is fixed to a holder 30, and the holder 30 is fixed to the lower arm 22 by screws with the arm spring 28 in between.

A characteristic feature of the present invention is that the arm spring 28 has an arm fixing portion 28a fixed to the arm body 24, and a pressing tongue piece 28b extending on the opposite side from the arm fixing portion 28a. That is, the pressing tongue piece 28b in the embodiment has slits 32 and 34 with respect to the carriage fixing parts 28C and 28d of the arm spring 28.
It is formed from tongue pieces separated by.

The 11/ridge fixing portions 28c and 28d are fixed with screws 38. with a temporary presser 36. /lo is firmly fixed to the carriage body 10.

In the present invention, the position of the pressing tongue piece 28b is determined by an adjustment member provided on the carriage body 10, and in the embodiment, it is formed of a screw 42 on the adjustment member t, and this screw 42 is connected to the presser plate 36. The tip thereof presses down the tail end of the pressing tongue piece 28b.

FIG. 2 shows the arm body stationary position adjustment operation in the assembled state of FIG. 1.

In the figure, the screw 42, which is an adjustment member, is screwed into the presser plate 36, and its tip is pressed against the upper surface of the pressing tongue piece 28b, displacing the pressing tongue piece 28b by a predetermined amount Uo, and applying this displacement force to the arm spring 28. By transmitting arm body 2
The rest position of No. 4 can be set to a predetermined value.

83 in the present invention, the pressing tongue piece 28 by this WJ adjustment member
The pressing force b acts as a pie scar to determine the rest position.

As described above, according to the present invention, by arbitrarily adjusting the pressing amount of the pressing tongue piece 28b, it is possible to set the entire position of the arm body 24 at a desired initial position,
Penetration and other adjustments can be made extremely easily with the device assembled.

In the embodiment described above, the arm body 24 is supported in one direction by a cantilever from the carriage body 10 as shown in FIG. Pressing tongue piece and m
! f! Combinations of members are similarly applicable.

Furthermore, although in the embodiments described above the adjustment member consists of a screw provided on the carriage body, it is also possible to form this adjustment member in any other configuration, such as a cam, an eccentric pin, or the like.

Further, according to this embodiment, the pressing tongue piece is provided on the arm spring with the slit Jζ, but its shape can be arbitrarily selected.

[Effects of the Invention] As explained above, according to the present invention, an arm body having an upper arm and a lower arm is fixedly held on a carriage body by a single arm spring, and the arm body is held stationary at this time. In order to arbitrarily adjust the position, a pressing tongue is provided on the arm spring, and an adjusting member is provided on the carriage body, and the pressing amount between the adjusting member and the pressing tongue is V1'JA! II! This has the advantage that the stationary position of the arm body can be adjusted arbitrarily.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view showing a preferred embodiment of the head support mechanism according to the present invention, Fig. 2 is a sectional view of main parts showing the assembled state of Fig. 1, m3.4
The figure is a dimensional explanatory view showing the structure of the head support mechanism that forms the basis of the present invention. 10... Carriage body 14... Floppy disk 16... Upper head 18... Lower head 20... Upper arm 22... Lower arm 24... Arm body 28... Arm spring 28a... - Arm fixing part 28b...Press tongue piece 42...Adjustment member. Applicant Shizizunji 81 Co., Ltd. Agent Patent attorney Kenji Furuta [7-76] (and 2 others) Figure 2 Figure 3 Figure 4 Hand K N City iE-Sai (Type 5) % Formula % 2. Defense Name 70 41 parts of the disk drive head support mechanism
Nishi-Shinjuku 2-1?11, Shinjuku-ku, Tokyo Name (196)
) Citizen 11.1 Total Co., Ltd. 5, as shown in the attached document with the date of the amendment order.

Claims (1)

[Claims] (1) A carriage body movable in the radial direction of the floppy disk, an arm body having an upper arm and a lower arm supporting an upper head and a lower head that can be brought into close contact with both sides of the floppy disk, respectively, and the arm body are integrated into one body. an arm spring that swingably supports the carriage body, the arm spring having an arm fixing part fixed to the arm body and a pressing tongue extending in a direction opposite to the arm fixing part. A head support mechanism for a floppy disk drive, characterized in that the adjustment member fixed to the carriage body is pressed by the pressing tongue of the arm spring to apply a predetermined bias force to the arm spring to adjust the resting position of the arm body. .