JPH03268281A - Magnetic recording and reproducing device - Google Patents

Abstract

PURPOSE:To facilitate an adjustment of a reference position detecting device for a carriage by forming an optical sensor integrally with the carriage for holding a magnetic head and providing also a flag integrally turnably with a lead screw. CONSTITUTION:The carriage 3 holding the magnetic head 4 is guided by a guide shaft 5 to move in the radial direction of a magnetic disk via the lead screw 7 which is driven by a stepping motor 6. The optical sensor 10 is formed integrally with this carriage 3, while the flag 16 for interrupting light to the sensor 10 in the reference position of the carriage 3 is provided to the screw 7 to be capable of turning integrally with the screw 7. Consequently, a moving amt. of the carriage 3 by one revolution of the screw 7 is obtained by calculation, and a distance capable of interrupting the light, which is transmitted through a slit of the sensor 10 when the carriage 3 is in the reference position, by means of the flag 16 is replaced by a rotary angle of the screw 7, and the position of the flag 16 is adjusted, and hence the adjustment of the reference position detecting device is easily and securely performed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a magnetic recording/reproducing device used in an external storage device such as a computer, and more particularly to a carriage reference position detecting device.

2. Description of the Related Art Conventionally, this type of magnetic recording/reproducing apparatus is equipped with a device for detecting a reference position of a carriage in order to align a magnetic head with an O track of a magnetic disk. below,
The above-mentioned conventional magnetic recording/reproducing device will be explained with reference to the drawings.

2 and 3 show a conventional magnetic recording and reproducing device,
FIG. 2 is a plan view of the main part, and FIG. 3 is a perspective view of the main part.

In FIG. 2, 1 is a substrate, 2 is supported on the substrate 1,
3 is a carriage; 4 is a magnetic head mounted on the carriage 3 for recording information on the magnetic disk and reproducing information recorded on the magnetic disk; 5 is a substrate 1; Supported by
A guide shaft that guides the carriage 3 so that the magnetic head 4 and the carriage 3 can be moved in the radial direction of the magnetic disk, 6 a stepping motor supported by the substrate 1, and 7 a lead screw, one end of which is connected to the stepping motor. 6, the other end is rotatably supported by a bearing part 8 on the base plate 1, and the middle three page part is engaged with the bearing part 9 of the carriage 3. Then, the carriage IJ jig 3, which is rotated by the driving of the stepping motor 6 and in which the bearing part 9 is engaged, is moved along the guide shaft 5 in the radial direction of the magnetic disk and positioned. 10 is a magnetic head 4, that is, an optical sensor for detecting the reference position of the carry Fuji 30 (
As is clear from FIG. 3, it has a light emitting part 11 and a light receiving part 12 facing each other vertically at the tip, and the light receiving part 12 has a slit 13 for transmitting light. The base portion is attached to the substrate 1 with a screw 15 using a long hole 14 formed along the moving direction of the carriage 3 so that the position can be adjusted. 16 is provided so as to be able to move together with the carriage 3, and is a flag (
track 0 flag).

In the above configuration, the optical sensor 10 is
To adjust the detection position to the reference position, loosen the screw 15 and move the optical sensor 10 so that the flag 16 blocks the light passing through the slit 13 when the carry nozzle 3 is in the specified position. After moving it using the elongated hole 14 and adjusting the position, it is fixed to the base 1 by tightening the screw 15.

Problems to be Solved by the Invention However, in the configuration of the prior art as described above, the edge of the light transmitting slit 13 of the optical sensor 10 and the edge of the flag 16 on the light transmitting slit 13 side is Since they are arranged at right angles and the adjustment distance between them is short, and the frictional resistance when sliding the optical sensor 10 on the substrate 1 is large, the optical sensor 10- is moved over a short distance. There was a problem that it was difficult to adjust the position.

The present invention solves the problems of the prior art as described above, and even if the distance for adjusting the position of the optical sensor with respect to the flag in the moving direction of the carriage is short, the moving distance of the optical sensor with respect to the flag is small. The object of the present invention is to provide a 5-page magnetic record book main device that can take a long time and easily adjust its position.

Means for Solving the Problems The technical solution of the present invention for achieving the above object is as follows:
A carriage that holds a magnetic head, a lead screw that can move and position the carriage in the radial direction of the magnetic disk, a stepping motor that rotationally drives this lead screw, and a carriage that can be moved integrally with the carriage. an optical sensor having a light transmission slit for detecting the reference position of the carriage; and an optical sensor provided so as to be able to rotate together with the lead screw; It is equipped with a flag that blocks light passing through the slit.

According to the present invention, the optical sensor is provided so as to be able to move together with the carriage, and the flag is provided so as to be able to rotate together with the lead screw, so that the movement of the carriage by one rotation of the lead screw is reduced. It would take six pages to calculate the amount, so we calculated the distance between the lead screws that would allow the flag to block the light that passes through the light transmission slit of the optical sensor when the carriage is in a predetermined position. The position can be adjusted by calculating and replacing the rotation angle and, based on this, providing the flag at a predetermined angular position so that it can rotate together with the lead screw.

EXAMPLES Hereinafter, examples of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of the main parts of a magnetic recording and reproducing apparatus according to an embodiment of the present invention.

In this embodiment, the same parts as those in the conventional example described above are given the same reference numerals, and the explanation thereof will be omitted, and the different configuration will be explained. As shown in FIG. 1, the optical sensor 10 is provided integrally with the carriage 3 so that it can move together with the carriage 3. On the other hand, the flag 16 is integrally provided on the outer periphery of the large diameter portion 17 at its base so as to be able to rotate together with the lead screw 7.

As described above on page 7, the optical sensor 10 is provided integrally with the carriage 3, and the flag 16 is provided integrally with the outer periphery of the inner diameter portion of the base of the lead screw 7.

On the other hand, the carriage 3 due to one rotation of the lead screw 7
That is, the amount of movement of the optical sensor 1o can be calculated. Therefore, when the carriage 3 is in a predetermined position, the light transmission slit 1 of the optical sensor 10
3 (see Figure 3), the distance between each other at which the flag 16 can block the light passing through is calculated and replaced with the rotation angle of the lead screw 7, and based on this, the flag 16 is set at the base of the lead screw 7. The position can be adjusted by providing it at a predetermined angular position on the large diameter portion 17 of.

Effects of the Invention As described above, according to the present invention, the optical sensor is provided so as to be able to move together with the carriage, and the flag is provided so that it can be rotated together with the lead screw. The amount of carriage movement can be calculated by calculating the distance between the lead screws that allows the flag to block the light that passes through the optical sensor's light transmission slit when the carriage is in a predetermined position. The position can be adjusted by calculating and replacing the rotation angle with the rotation angle, and then providing the flag at a predetermined angular position so as to be able to rotate together with the lead screw based on this. Therefore, the position of the carriage reference position detection device can be easily adjusted.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the main parts of a magnetic recording and reproducing apparatus according to an embodiment of the present invention, FIGS. 2 and 3 show conventional magnetic recording and reproducing apparatuses, and FIG. 2 is a plan view of the main parts. FIG. 3 is a perspective view of the main parts. 3... Carriage, 4... Magnetic shaft, 5... Guide shaft, 6... Stepping motor, 7...
Guide screw 10... optical sensor, 13...
- Light transmission slit, 16...flag.

Claims (1)

[Claims] A carriage that holds a magnetic head, a lead screw that can move and position the carriage in the radial direction of the magnetic disk, a stepping motor that rotationally drives this lead screw, and is provided so as to be able to move integrally with the carriage. , an optical sensor having a light-transmitting slit for detecting the reference position of the carriage, and an optical sensor provided so as to be able to rotate together with the lead screw, and when the carriage is at a predetermined position, the slit is A magnetic recording and reproducing device equipped with a flag that blocks transmitted light.