JPS63119073A - Carriage driver for floppy disk drive - Google Patents

Abstract

PURPOSE:To save a screw and a spring each by forming a screw retainer and side pressing spring unitedly in the form of coating it to a carriage. CONSTITUTION:The screw retainer and side pressure spring 1 are fixed to the carriage 3 by a fastening screw 51. A guide rail 4 is inserted to the carriage 3 and the carriage 3 is slided along the guide rail 4. In this case, the screw retainer and side pressing spring 1 formed unitedly with a screw retaining spring and a side pressing spring is folded in a form to be coated to the carriage 3 and fixed by the fastening screw 51. Thus, the carriage 3 is in press contact with a lead screw 2 and the guide rail 4 by the screw retainer and side pressing spring 1 at the same time. A screw pin 2 provided to the carriage 3 is pressed into contact with the slot of the lead screw 2. Thus, when the lead screw 2 is turned, the screw pin 11 is driven and the carriage 3 is moved by a distance in response to a rotary angle along the guide rail 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a carriage drive device for a floppy disk drive.

[Conventional technology]

Floppy disks, which are flexible disks with a magnetic recording coating applied to their surfaces, are well known and have become widespread as simple magnetic recording media for computers in recent years. Floppy disk drives that dynamically load/read information are well known.

DESCRIPTION OF THE PREFERRED EMBODIMENTS A conventional carriage drive device for a 70-speed disk drive will be described below with reference to the drawings.

2 to 4 are perspective views showing essential parts of a conventional carriage. FIG. 5 is a sectional view of the main part of the carriage. In the figure, a carriage 6 is moved along a guide rail 4 by rotation of a lead screw 2 that is directly connected to a stepping motor (not shown). The lateral pressure spring 7 is attached to the carriage 6
and the guide rail 4. As shown in FIGS. 2 and 3, the lateral pressure spring 7 is fixed to the carriage 6 by a set screw 52. As shown in FIGS. Then, it comes into pressure contact with one guide rail 4, and presses the carriage 3 in the direction of the other guide rail 4. This eliminates backlash that occurs between the carriage 6 and the guide rail 4. Furthermore, the lateral pressure metal 6 that engages with the lateral pressure spring 7 does not allow the lateral pressure spring 7 to directly contact the guide rail 4, but allows the carriage 3 to slide freely with low friction.
is being pressed.

The screw presser spring 10 and the screw pin 11 shown in FIGS. 4 and 5 are respectively fixed to the carriage 6 with setscrews 56 and 54, and hold the lead screw 2 therebetween. The screw bottle 11 engages with the groove of the lead screw 2 and controls the rotation of the stepping motor from the carriage 6.
It has the function of converting it into a round trip.

As is clear from the above explanation, the carriage 6 is supported by the lateral pressure spring 7.
The guide rail 4 is pressed by the screw presser spring 10, and the lead screw 2 is pressed by the screw presser spring 10. A lead screw S in which a screw pin 11 fixed to a protrusion of the carriage 6 with a set screw 54 is directly connected to a stepping motor.
The carriage 6 can be moved back and forth by receiving the -2 rotation.

[Problems to be Solved by the Invention] However, when the carriage is made thinner (smaller), the guide rail hole of the carriage and the magnetic head support part become close to each other, and the space required for a spring with the spring constant required for the lateral pressure spring is reduced. Problems have arisen in that it is extremely difficult to create a space between the carriage and the guide rail, and that there is not enough thickness to machine the screw holes for fixing the lateral pressure springs.

SUMMARY OF THE INVENTION An object of the present invention is to provide a small and inexpensive carriage drive device for a floppy disk drive by solving the above-mentioned problems and reducing the number of parts and the screw hole machining process.

[Means for solving problems]

In order to achieve the above object, the present invention is directed to Suff IJ.

- The carriage holds the guide rail and the screw by threading the screw presser/lateral pressure spring, which is formed by integrating a presser spring and a lateral pressure spring to cover the carriage, into the carriage.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings. 1st
The figure is a perspective view of a carriage drive device showing one embodiment of the present invention. In the figure, the screw retainer/lateral pressure spring 1 is fixed to the carriage 6 with a set screw 51. A guide rail 4 is inserted through the carriage 6, and the carriage 6 slides along this guide rail 4. However, since there is play between the guide rail 4 and the carriage 6, a lateral pressure spring is required to remove this play, as in the conventional case. In the present invention, a screw retainer/lateral pressure spring 1, which is an integrally molded screw retainer spring and a lateral pressure spring, is bent into a shape that covers the carriage 6 and is fixed with a set screw 51. Therefore, the carriage 6 is pressed against the lead screw 2 and the guide rail 4 at the same time by the screw presser/side pressure spring 1.

The groove of the lead screw 2 is also provided in the carriage 6.
The screw pin 11 is engaged and pressed in the same way as in the conventional example shown in FIG.

With the above configuration, when the lead screw 2 rotates,
The screw bin 11 receives the rotation, and the carriage 6
moves along the guide rail 4 a distance corresponding to the rotation angle.

〔Effect of the invention〕

As is clear from the above explanation, according to the present invention, by integrally molding the screw retainer and lateral pressure spring to cover the carriage, it is possible to save one screw and one spring part, and at the same time, the carriage parts can be saved. It becomes possible to find a margin in the mounting space, and it is possible to obtain a carriage drive device that is effective in shortening the parts processing process and assembly process, reducing costs, and reducing the size.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of essential parts of a carriage drive device showing an embodiment of the present invention, Figs. 2 to 5 show a conventional example, and Figs. 2 and 3 show a state in which a lateral pressure spring is attached to a carriage. FIG. 4 is an external view showing the main part of the screen with the screen presser spring attached to the carriage, and FIG. 5 is a sectional view of the main part of the carriage. 1...Screw holder lid side pressure spring, 2...
...Lead screw, 6...Carriage, 4...Guide rail, 6...Side pressure metal, 7...Side pressure spring, 10...・Screw presser spring, 11...
・Screw pin, 51.52.55.54...Set screw. Figure 1 et al. 1 Figure 2 Figure 3 Figure 4 Figure 51&

Claims (1)

[Claims] In a floppy disk drive carriage drive device in which a carriage carrying a magnetic head is slidably supported on a guide rail and driven by a lead screw stepping motor, a presser spring presses a screw pin against the lead screw and the carriage is attached to the guide rail. 1. A carriage drive device for a floppy disk drive, characterized in that a lateral pressure spring that presses a screw holder and a lateral pressure spring that is integrated with the lateral pressure spring is formed so that the carriage is covered with the lateral pressure spring.