JPS6343636Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field This invention relates to a carrier drive device for a floppy disk.

2. Description of the Related Art In general, there are various methods for moving the head facing the magnetic sheet in a floppy disk. Among these, there is a method in which a carrier is provided on a linear guide shaft so as to be able to reciprocate, and the carrier is There are some with fixed heads.
There are various methods for driving this carrier, such as those using a cam, those using a lead screw, and those using a belt. Each of these drive methods has advantages and disadvantages, and is selectively adopted depending on the design purpose.

Problems that the invention aims to solve: Therefore, the belt-based drive method involves placing a belt on the side of the carrier, winding this belt around a drive wheel, and causing the carrier to be fed according to the rotation angle of the drive wheel. It is something that exists. Although such belts are installed with a predetermined tension in order to obtain driving stability, changes in temperature and humidity can cause elongation and reduce the tension. To solve this problem, conventional belts have one end fixed and a tension spring attached to the other end to pull the belt in the direction in which it is stretched. With this configuration, the belt tension is always maintained constant, but since the tensioning direction of the spring and the driving direction of the carrier are the same, a carrier moving force is applied to the spring, and this Therefore, there is a drawback that it is difficult to achieve accurate positioning of the track.

In addition, the belt has a certain width, and it is necessary to set the position in the width direction accurately and install it.
Conventionally, no particular countermeasures have been taken.

This idea was devised in view of these points, and was designed to help position the belt in the width direction, fix the belt,
To provide a carrier drive device for a floppy disk which can simultaneously absorb elongation of a belt easily.

Means for Solving the Problems This invention makes the width of the attachment end of the belt, the width of the carrier, and the width of the belt width guide match, and the belt width guide and the belt and the plate that absorbs the elongation of the belt. The fixing with the spring is performed at the same time.

Function The width of the mounting end of the belt matches the width of the carrier, and when it is mounted using a belt width guide, the belt width guide also matches the belt width, so the position in the width direction can be determined accurately. , the installation is extremely easy by attaching it together with the leaf spring.

Example An embodiment of this invention will be explained based on the drawings.

First, although only one is shown, two guide shafts 1 are provided in parallel, and a carrier 2 is provided on these guide shafts 1 so as to be able to slide back and forth. A head 3 that contacts a magnetic disk (not shown) is attached to the carrier 2, and a thin plate-shaped belt 5 is attached to the side surface 4. This belt 5
A single thread part 6 and a double thread part 7 are arranged in series, and a mounting hole 8 is formed at each end.
The mounting ends 9 and 10 at both ends of the belt 5 where the mounting holes 8 are formed are formed to have the same width as the plate thickness of the carrier 2, and especially the mounting end on the side of the multi-striped portion 7. At 9, the belt 5 is fixed by a fixing screw 12 while being positioned in the width direction by a U-shaped belt width guide 11 having a width matching the width of the belt 5. In addition, at the mounting end 10 on the side of the single thread part 6, a belt side guide 11 and a leaf spring 1 are attached.
3 are overlapped, and the pressing part 14 at the tip of the leaf spring 13 is positioned at a position corresponding to the recess 15 formed in the side surface 4 of the carrier 2, and the belt width guide 11, the leaf spring 13, and the belt 5 are aligned. It is fixed at the same time by a real fixing screw 16.

A drive wheel 17 connected to a pulse motor (not shown) is provided on the side of the carrier 2, and the belt 6 is wound around the outer peripheral surface 18 of the drive wheel 17 and fixed with screws 19. ing.

In such a configuration, when the drive wheel 17 rotates, the rotation axis of the drive wheel 17 is fixed, so the belt 6 moves the carrier 2 along the guide shaft 1.
moves back and forth. At this time, the belt 6 is connected to the leaf spring 13
Since it is pressed by the elastic force of the belt 4, it always maintains a constant tension, and the rotation angle of the drive wheel 17 corresponds precisely to the position of the carrier 2, that is, the position of the belt 4. Therefore, track accuracy is maintained at an extremely high level.

Therefore, when the belt 6 is attached, the attachment end 10
On the side, the belt width guide 11, leaf spring 13, and belt 5 are simultaneously fixed by a single fixing screw 15, so that the belt 5 can be reliably positioned and fixed in the width direction, and the leaf spring A predetermined tension based on the elastic force of No. 13 is applied. Therefore, three functions can be performed by connecting one fixing screw 16, and therefore the assembly work can be performed with high workability despite the simple structure.

Next, what is shown in FIG. 3 is a modified example of a belt width guide 11 in which a portion of a leaf spring 13 is integrally formed. Although such a device can be obtained by plastic molding or the like, the structure can be simplified and the number of parts can be reduced.

Effects of the invention This invention is based on the width of the attachment end of the belt and the width of the side of the carrier in which the belt provided on the side of the carrier is wound around the drive wheel to cause the carrier to reciprocate as described above. A belt width guide is formed with a width that matches the width of the belt, and the belt width guide is fixed together with a leaf spring that contacts the belt surface to absorb the elongation of the belt. Because of this, when installing the belt, it is possible to simultaneously achieve the positioning in the width direction and the function of absorbing elongation.This makes it possible to achieve good workability and a simple structure.
This has the advantage that the number of parts can be reduced.

[Brief explanation of the drawing]

The drawing shows one embodiment of this invention.
2 is an exploded perspective view, FIG. 2 is an assembled perspective view, and FIG. 3 is a perspective view showing a modification of the belt width guide. 1... Guide shaft, 2... Carrier, 4... Side, 5... Belt, 11... Belt width guide, 1
3... Leaf spring, 17... Drive wheel.

Claims (1)

[Scope of utility model registration request] A belt is stretched along the side surface of a carrier provided on a guide shaft so as to be able to slide back and forth, and the belt is wound around a drive wheel connected to a motor, the attachment end of the belt being wound around a drive wheel connected to a motor. and a side surface of the carrier, and a belt width guide that matches the width dimension of the belt and determines its position in the width direction, and the belt width guide is brought into contact with the belt to control its elongation. A carrier drive device for a floppy disk, characterized in that it is fixed together with a leaf spring that absorbs.