JPH01105366A - Carriage mechanism for floppy disk device - Google Patents

Abstract

PURPOSE:To fit a head arm without fail in respect of a carriage main body and to set the relative position of each magnetic head with high accuracy by providing a screw mechanism and a washer member in respect of the head arm. CONSTITUTION:The fitting part of a head arm 11 is mounted on a fitting part 21 of a carriage main body 20 so that magnetic heads 12 and 13 may face each other. A washer 22 is fitted so that holes 24a and 24b of the washer 22 may correspond to screw hole parts 15a and 15b of the main body 20. Next, the screws 14a and 14b penetrate the respective holes 24a, 24b and the hole of the arm 11, respectively fit into the hole part 15a and 15b, the arm 11 is thrust-pressured to the washer 22, and fixed at the horizontal surface of the main body 20. Thereafter, after the adjustment of the relative position of the heads 12 and 13, when the screws 14a and 14b are tightened, the rotation of the arm 11 due to a twisting torque is prevented, and the misregistration of the heads 12 and 13 is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a carriage mechanism of a floppy disk device equipped with a double-sided magnetic head.

(Prior Art) Conventionally, in a double-sided floppy disk device, as shown in FIG. 5, the carriage mechanism consists of a carriage body 10 and a head arm 11. The carriage body 10 has a side 0 magnetic head 12 mounted on one end via a gimbal. Further, the head arm 11 supports the magnetic head 12 on the side 0 and the magnetic head 13 on the side 1 opposing the magnetic head 12 on the side 0 via a gimbal at one end thereof. During read/write, each magnetic head 12, 13 comes into contact with the lower and upper surfaces of the disk, which is a magnetic recording medium.

By the way, in a floppy disk device, in order to maintain compatibility, it is necessary to set the relative positions of the magnetic heads 12 and 13 with high accuracy (error of several μm or less) when they face each other. However, when connecting the carriage body ■0 and the head arm 11, as shown in FIG.
Usually, there are two screws 14a.

14b is used. For this reason, the screw 14a.

When tightening 14b, torsional torque is generated, and this torsional torque acts to rotate the head arm 11. Therefore, after the relative positions have been adjusted, the screws 1.4a and 14b are tightened, resulting in a situation where the relative positions of the magnetic heads 12, 13 are shifted.

(Problems to be Solved by the Invention) In the conventional carriage mechanism, the head arm 11 is attached to the carriage body 10 by screws 14a and 14b. When tightening the screws 14a and 14b, the screws L4a and 14 are sometimes tightened against the head arm 11.
Torsional torque from tightening b acts, and a rotating force acts. Therefore, after the relative positions of the magnetic heads have been adjusted, there is a problem in that positional deviation occurs due to rotation of the head arm 11.

SUMMARY OF THE INVENTION An object of the present invention is to provide a carriage mechanism for a floppy disk device that is capable of reliably attaching a head arm to a carriage body and setting the relative positions of opposing magnetic heads with high precision. be.

[Structure of the Invention] (Means and Effects for Solving the Problems) The present invention provides a screw mechanism and a screw member for attaching a head arm to a carriage body using a screw member in a carriage mechanism equipped with a double-sided magnetic head. A washer member is provided which is arranged as a washer for the member. The washer member is a member that engages with a stopper portion provided at the mounting portion of the carriage body and has the function of preventing rotational action on the head arm when the screw member is tightened.

With this configuration, even if the screws for fixing the head arm to the carriage body are tightened after adjusting the relative position of each magnetic head,
Rotational action on the head arm can be prevented. Therefore, deviations in the relative positions of the respective magnetic heads can be prevented.

(Example) The present invention will be described in detail below with reference to the drawings. FIG. 1 is a perspective view showing the structure of a carriage mechanism according to a first embodiment of the present invention. In FIG. 1, the carriage body 2
The magnetic head 12 of the side 0 is mounted on the side 0, and the head arm 11 is attached as a part 21 on the other side. For installation, screw 14 on the horizontal surface of part 21.
Screw holes 15a and 15b corresponding to a and 14b
is formed. The screws 14a, 14b and the screw holes 15a, 15b constitute a screw mechanism for fixing the head arm 11 to the carriage body 20. In addition, the mounting is done on each side of the section 21.
A groove-shaped stopper portion 23 is formed to engage with a portion of the washer 22 . In addition, the stopper part 23
may have a square hole shape.

The washer 22 is a thin metal part, and the screw 14
each person 24a, 2 to penetrate a, +4b
It has 4b. The washer 22 includes a main body portion corresponding to the horizontal surface of the carriage main body 20 and a protrusion portion 25 bent from the main body portion. The protrusion 25 is attached to the carriage body 20
It has a shape that fits into the stopper part 23 of. still,
The other configurations are the same as those shown in FIG. 3, so their explanation will be omitted.

Next, the effects of this embodiment will be explained. First, the magnetic head 12 on side 0 is attached to the carriage body 20 via a gimbal. In addition, the head arm 11 has
The magnetic head 13 on side 1 is attached via a gimbal. Such a carriage body 20 and head arm 1
1 are assembled. That is, the mounting section 21 of the carriage body 20 is connected to the mounting section 21 so that the magnetic heads 12, 13 face each other. In this state, the screw hole 15a of the carriage body 20
, 15b, the washer 22 is attached so that the holes 24a, 24b of the washer 22 match with the holes 24a, 24b. In this case, the washer 22 is in a state in which each protrusion 25 fits into the groove of the stopper part 23, and the stopper part 23 prevents the washer 22 from rotating in the horizontal direction.

In this state, the screws 14a and 14b pass through each member 24a and 24b of the washer 22 and each member of the head arm 11, and the screw holes 1 of the carriage body 20 are inserted.
5a.

15b. As a result, the head arm 11 is fixed to the horizontal surface of the carriage body 20 while being pressed by the washer 22 . In this case, the screws 14a and 14b are tightened using a tool such as a screwdriver, but are only temporarily tightened.

In this temporarily tightened state, the head arm 11 is normally slightly rotated in the horizontal direction, and each magnetic head 12, 13
The relative position between them is adjusted.

When the adjustment of the relative position between each magnetic head 1, 2, and 13 is completed, each screw 14a is temporarily tightened with a screwdriver.

14b is tightened. At this time, the rotational torque of the screws 14a, 14b by the driver is transmitted to the washer 22, and torsional torque is generated in the washer 22. However, since the protrusion 25 of the washer 22 is fitted into the stopper tab 23, rotation in the horizontal direction is prevented. Therefore, head arm 11
No torsional torque is transmitted to the head arm 11, and the head arm 11 is attached to the carriage body 20 by using the washer 22 with respect to the section 21.
It is in a state where it is only being pressed by.

In this way, after adjusting the relative position of each magnetic head 12, 13, the tightening of the screws 14a, 14b can prevent rotation of the head arm 11 due to torsional torque when performing the work. That is, since the rotation of the washer 22 is prevented by the stopper portion 23, the head arm 11 is fixed in a suppressed state toward the carriage body 20 side by the washer 22 without rotating in the horizontal direction. Therefore, it is possible to reliably prevent a situation in which the respective magnetic heads 12, 13 are misaligned after adjusting their relative positions.

FIG. 2 is a perspective view showing a partial configuration according to a second embodiment of the present invention. The second embodiment uses two independent washers 3 instead of the washer 22 in the first embodiment.
This is the case when 0.31 is used.

Each of the washers 30, 31 is formed with projections 30a and 31a corresponding to the projection 25, respectively.

Note that the other configurations and effects are the same as those of the first embodiment shown in FIG. 1, so their explanations will be omitted.

FIG. 3 is a perspective view of a third embodiment of the present invention.

In the third embodiment, the carriage body 20 is attached to the section 21.
There are protruding (cylindrical) stopper portions 40a, 40.
b is provided. Furthermore, in the third embodiment, in place of the washer 22 in the embodiment shown in FIG.
is provided. This washer 41 has each recess 41a,
41b is fitted into the stopper parts 40a, 40b, and is mounted in a state where rotation in the horizontal direction is prevented by the stopper parts 40a, 40b.

Note that the other configurations and effects are the same as those of the first embodiment shown in FIG. 1, so explanations will be omitted.

FIG. 4 is a perspective view showing a partial configuration according to a fourth embodiment of the present invention. The fourth embodiment is a case in which two independent washers 43 and 44 are used in place of the washer 41 in the third embodiment shown in FIG. Also, a cylindrical stopper portion 40a.

40b is replaced by a prismatic stopper portion 42a.

42b is provided. Each washer 43, 44 has four portions 43a, 44a formed at each end that fit into the stopper portions 42a, 42b.
, 42b prevents horizontal rotation. It should be noted that the other configurations and effects are the same as those of the first embodiment shown in FIG. 1, so explanations thereof will be omitted.

[Effects of the Invention] As described in detail above, according to the present invention, when tightening the screws when attaching the head arm to the carriage body, the rotation of the head arm is performed after adjusting the relative position of each magnetic head. It is possible to reliably prevent positional displacement of each magnetic head due to the action.

Therefore, the carriage mechanism can be reliably assembled, and the relative positions of the magnetic heads can be adjusted with high precision.

As a result, for example, when tightening a screw, a positional shift occurs due to the work, which conventionally required work to perform relative position adjustment again, but such work can be made unnecessary. Further, since the screw tightening operation after the above-mentioned position adjustment operation can be made unnecessary, the number of screw tightening operations can be reduced as a result. therefore,
Screw tightening can improve work efficiency and can also provide excellent effects such as reducing wear on the surfaces of the head arm and carriage body due to screw tightening.

[Brief explanation of the drawing]

1 is a perspective view showing the configuration of a carriage mechanism according to a first embodiment of the present invention, FIG. 2 is a perspective view showing a partial configuration of a carriage mechanism according to a second embodiment of the present invention, and FIG.
The figure is a perspective view showing the structure of a carriage mechanism according to a third embodiment of the present invention, FIG. 4 is a perspective view showing a partial structure of a carriage mechanism according to a fourth embodiment of the invention, and FIG. FIG. 2 is a perspective view showing the configuration of a conventional carriage mechanism. DESCRIPTION OF SYMBOLS 10, 20... Carriage main body, 11... Head arm, 12, 13... Magnetic head, 14a, 14
b...screw, 22.30°31, 41.43.44
...Washer, 23.40a, 40b. 42a, 42b...stopper parts. Applicant's agent Patent attorney Takehiko Suzue

Claims (5)

[Claims] (1) In a carriage mechanism of a floppy disk device, in which a head arm carrying a second magnetic head facing the first magnetic head is attached to a carriage body carrying a first magnetic head, the carriage A screw mechanism for tightening and fixing each attachment part with a screw member when attaching the head arm to the main body, and a screw mechanism that fits into a stopper part provided on the attachment part of the carriage body to tighten the screw member. a washer member disposed as a washer for the screw member to prevent rotational action of the head arm on the head arm. (2) The stopper portion includes a groove formed in a side surface of the mounting portion of the carriage body, and the end portion of the washer member fits into the groove and rotates with respect to the head arm when the screw member is tightened. 2. The carriage mechanism of a floppy disk device according to claim 1, wherein the carriage mechanism is configured to prevent the operation. (3) The stopper portion includes a protrusion provided on the attachment portion of the carriage main body, and a recess formed at the end of the washer member fits into the protrusion so that the 2. The carriage mechanism of a floppy disk device according to claim 1, wherein the carriage mechanism is configured to prevent rotational action on the head arm. (4) The groove forming the stopper portion and the washer member are combined into two sets, and are configured to prevent rotational action on the head arm when tightening the screw member. The carriage mechanism of a floppy disk device according to claim (2). (5) The protrusion forming the stopper portion and the washer member are combined into two sets, and are configured to prevent rotational action on the head arm when tightening the screw member. A carriage mechanism for a floppy disk device according to claim (3).