JPS63241771A - Carriage mechanism for floppy disk device - Google Patents

Abstract

PURPOSE:To adjust the position of a carriage with an easy operation, by constituting a mechanism in such a way that the carriage is moved by fitting a mounting member fixed on the carriage moved by the rotation of a lead screw in a sliding part. CONSTITUTION:The lead screw 11 motor-rotated with the needle 14 and the stopper 21 of a positioning shaft member 20 pinched by the supporting part 25 of the mounting part 24 fixed on the carriage 12 is pinched from upside and downside. A position adjusting tool 30 is inserted to a hole 28, and a gear 31 is fitted in the screw shaped part 23 of the member 20, and the carriage 12 is moved relatively by the rotary shaft of the gear 31, and after positioning the carriage at position corresponding to tracking adjustment, the members 24 and 20 are fixed with screws 26. Therefore, it is possible to perform the fine adjustment of the carriage 12 directly without rotating a stepping motor, and to perform the positioning of the carriage accurately with the easy operation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a carriage mechanism of a lead screw type floppy disk device.

(Prior Art) Conventionally, a lead screw type carriage mechanism is often used in small floppy disk devices. As shown in FIG. 3, in this type of carriage mechanism, a lead screw 11 connected to the rotating shaft of a stepping motor 10 rotates, and the rotational motion of the lead screw 11 is converted into linear motion and transmitted to the carriage 12. is configured to do so.

The carriage 12 is attached to the needle 14 via the member 13.
It is equipped with As shown in FIG. 4, this needle 14 comes into contact with the groove of the lead screw 11, converts the rotational motion of the lead screw 11 into linear motion, and transmits the linear motion to the carriage 12. The carriage 12 is guided by a guide rail 15 and moves linearly in the radial direction of a disk (not shown).

By the way, when assembling the carriage mechanism, it is necessary to adjust the tracking of the magnetic head mounted on the carriage 12 on the disk. That is, it is necessary to set the reference position of the carriage 12 so that the magnetic head is correctly positioned on the track on the disk. in particular,
The fixing screw 16 of the stepping motor 10 is loosened, and the stator is mechanically rotated to rotate the lead screw 11.

This causes the needle 14 to move and the position of the carriage 12 to be adjusted.

However, in the tracking adjustment method as described above, if the rotation angle of the lead screw 11 does not accurately follow the rotation angle of the stator of the stepping motor 10, the accuracy of the adjustment will deteriorate. Therefore, by electrically rotating the stepping motor 10, the carriage 1
It is necessary to perform position adjustment again for 2. Also,
To loosen the fixing screw 16 of the stepping motor 10,
There are drawbacks such as the lead screw 11 being miscentered.

(Problem to be solved by the invention) Conventionally, in the lead screw type carriage mechanism,
When performing position II adjustment of the carriage 12 for tracking adjustment, it is necessary to mechanically and electrically rotate the stepping motor 10, loosen the fixing screw of the stepping motor 10, etc. Therefore, the adjustment work is complicated and inefficient, resulting in a problem that the efficiency of the assembly process of the carriage mechanism is reduced. Further, there is also the problem that the lead screw is likely to be miscentered, resulting in a decrease in adjustment accuracy.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a carriage mechanism for a floppy disk device that allows for easy and highly accurate carriage position adjustment using a lead screw method.

[Structure of the Invention] (Means and Effects for Solving the Problems) The present invention provides a positioning shaft member having a conversion member such as a needle and a positioning shaft member in a movable state or A mechanism equipped with a member is used to attach the device to the fixed state. The positioning shaft member has an adjustment screw-shaped portion for adjusting the moving distance of the carriage. The mounting member is fixed to the side surface of the carriage, and has a mounting portion for mounting the adjustment member that fits into the adjustment screw-shaped portion of the positioning shaft member.

With this configuration, the position of the carriage can be directly adjusted without adjusting the rotation of the stepping motor.

(Example) The present invention will be described in detail below with reference to the drawings. FIG. 1 is a perspective view showing a partial configuration of the same embodiment. In FIG. 1, the positioning shaft member 20 is an L-shaped member,
It consists of a plate-shaped portion 20a and a cylindrical portion 20b. Plate portion 20
A needle 14 and a stopper 21 are attached to a. Furthermore, the cylindrical portion 20b is formed with a fixing elongated hole 22 and a screw-shaped portion 23 for position adjustment.

The mounting member 24 has a support portion 2 that fits into the cylindrical portion 20b of the positioning shaft member 20 so that the positioning shaft member 20 can slide.
This is a member that is held so as to be held between the two parts.

The mounting member 24 is fixed to the side surface of the carriage 12. For installation, the member 24 has a screw hole 2 through which a screw 26 corresponding to the fixing elongated hole 22 of the positioning shaft member 20 is passed.
7 is formed. Further, the mounting member 24 is formed with a tool hole 28 through which the tip of a tool for adjusting the position of the carriage 12 is passed. Position adjustment instrument 30
As shown in FIG. 2, there is a positioning shaft member 20 at the tip.
A gear 31 that fits into the screw-shaped portion 23 is formed, and a stabilizing pin 32 is coupled to the tip of the gear 31.

Next, the effects of this embodiment will be explained. First, as shown in FIG. 1, the positioning shaft member 20 is fitted into the mounting member 24. That is, the cylindrical portion 20 of the positioning shaft member 20
b is mounted and held in a slidable manner by a support portion 25 of the member 24. In this state, the needle 14 of the positioning shaft member 20 contacts the groove of the lead screw 11 on the lower side,
The stopper 21 comes into contact with the lead screw 11 so as to press it from above. Incidentally, the lead screw 11 is connected to the rotating shaft of the stamping motor as shown in FIG. 3 above.

Next, the positioning shaft member 20 is semi-fixed by the screw 26 passing through the screw hole 27. Then, the distal end of the positioning tool 30 is inserted into the tool hole 28, and the gear 31 is set so as to fit into the threaded portion 23 of the positioning shaft member 20. In this case, until the stabilizing pin 32 of the position adjustment device 30 enters the hole 29 formed in the mounting member 24,
The tip of the position adjustment instrument 30 is inserted into the instrument hole 28. In this case, the outer diameter of the main body of the position adjustment instrument 30 and the inner diameter of the instrument hole 28 are approximately the same. When the position adjustment tool 30 is rotated in this state, the gear 31 fitted into the screw-shaped portion 23 rotates, and the carriage 12 is moved in a direction corresponding to the direction of rotation. In this case, the needle 14 is in contact with the groove of the lead screw 11,
The lead screw 11 is connected to the rotating shaft of the stepping motor and is in a non-rotating state.

That is, when the positioning tool 30 is rotated, the carriage 12 relatively moves linearly because the positioning shaft member 20 is fixed by the contact between the needle 14 and the lead screw 11. The amount of movement at this time is determined by the outer diameter of the screw 26 and the size of the fixing elongated hole 22. As a result, the carriage 12 is slightly moved linearly in the radial direction of the disk, and is set at a position corresponding to the tracking adjustment of the magnetic head.

When the position adjustment of the carriage 12 is completed, the screw 26 is tightened to fix the positioning shaft member 20 to the mounting member 24. In this state, when the lead screw 11 rotates,
The positioning shaft member 20 to which the needle 14 is fixed converts the rotational motion of the lead screw 11 into linear motion and transmits it to the carriage 12.

In this way, during tracking adjustment, the carriage 12 can be directly slightly moved using the position adjustment instrument 30. At this time, the amount of movement of the carriage 12 can be controlled by the amount of rotation of the position adjustment instrument 30. Therefore, it is possible to directly adjust the movement of the carriage 12 without rotating the stepping motor.
The troublesome work required to adjust the rotation of the stepping motor can be omitted. Furthermore, since the position of the carriage 12 can be adjusted with the lead screw 11 in a fixed state, there is no possibility of the lead screw 11 being miscentered, and the accuracy of the entire adjustment work can be improved. . Furthermore, after adjusting the position, the carriage 12 can be moved to the lead screw 11 by simply tightening the screw.
It is possible to move it linearly by rotating it.

[Effects of the Invention] As detailed above, according to the present invention, in a lead screw type carriage mechanism, minute movement adjustment of the carriage can be performed directly and easily without rotating the lead screw. . Therefore, the position of the carriage can be adjusted easily and with high precision. Further, after position adjustment, a mechanism for moving the carriage in accordance with the rotational drive of the lead screw can be constructed by simply tightening the screw. As a result, the efficiency of the assembly process of the carriage mechanism of the floppy disk device can be improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a partial preparation according to an embodiment of the present invention, FIG. 2 is a perspective view showing the configuration of a position adjustment device of the same embodiment, and FIG. 3 is a perspective view showing the configuration of a conventional carriage mechanism. FIG. 4 is a plan view showing the structure of a conventional lead screw. 10...Stepping motor, 11...Lead screw, 12...Carriage, 14...Needle, 2
0...Positioning shaft member, 22...Elongated hole for fixing, 23
...Screw-shaped part, 24...Member for installation, 26...
Screw, 28... hole for instrument, 30... position adjustment instrument, 31... gear. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] In a lead screw type carriage mechanism that converts the rotational motion of a lead screw into linear motion to drive a carriage on which a magnetic head is mounted, the rotational motion of the lead screw comes into contact with a groove of the lead screw. a positioning shaft member that holds a conversion member for converting the motion into a linear motion and has an adjustment screw-shaped portion for adjusting the moving distance of the carriage; A freely attachable mechanism that supports the positioning shaft member so that it can be moved linearly, has an attaching portion for attaching an adjusting member that fits into the adjusting screw-shaped portion, and puts the positioning shaft member in a movable state or a fixed state. 1. A carriage mechanism for a floppy disk device, comprising: a mounting member having a mounting member;