JPS6122478A - Magnetic disc driver - Google Patents

Abstract

PURPOSE:To adjust after assembling by contacting a carriage to the stopper of a chassis to form a 00 track stopper and fitting a 00 track sensor at a position adjusted from the opposite side of the carriage fitting. CONSTITUTION:The 00 stopper is constituted that a stopper contact part 16 of the carriage 5 contacts a projection 17 of a chassis 1 when a magnetic head (carriage 5) is shifted toward the outer peripheral from the 00 track within the specified track and the adjustment is omitted. Then the 00 track sensor 10 is fitted to a mounting plate 18 by tightening for one side as fitting of a projection 24 to a mounting hole and for the other as mounting by a screw 26 from the lower side. When the screw 26 is loosened and the screw 26 is moved and adjusted in the track direction, the mounting plate 18 is moved and adjusted interlockingly, the position of the sensor 10 is adjusted and a series of adjustments are attained in the assembling on the upper board.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a magnetic disk drive device, and particularly to adjustment thereof.

[Background of the invention]

Generally, a magnetic disk drive (hereinafter abbreviated as FDD)
A magnetic head is installed at the tip of a carriage, and the carriage and a stepping motor are connected by means such as a steel belt.The carriage moves in parallel along the surface of the magnetic disk, and the magnetic head moves to a specified track on the magnetic disk. The fact that it has a positioning structure is disclosed in Japanese Patent Publication No. 53-1239.
This is well known from No. 11. Based on the well-known configuration of the FDD described above, it is also well-known that the following adjustments can be made to the FDD.

(1) Head positioning adjustment: Adjustment to ensure that the magnetic head is positioned on a specified track within a specified error range.

(2) 00 track stopper adjustment: If the carriage (magnetic head) is sent beyond the 00 track to the outer circumference by more than the specified track, it will not be able to return to the 00 track (unable to start). In order to prevent this, a 00 track stopper is installed and adjusted so that the 00) rack does not move more than a specified track to the outer circumference.

(3)00) Rack detection sensor adjustment 00 so that the 200 track sensor detects the 00 track at the specified position
This adjusts the position of the track sensor in the track direction.

Current FDDs based on the above-mentioned well-known configuration generally have a structure in which a cover is attached to the upper side of the carriage attachment side, which has the following problems.

0 Adjustments in (2) and (3) above cannot be made with the upper cover attached. (It is not possible to make a series of adjustments in the completed state with the upper cover attached.) O As above, it will be necessary to connect to the side cover and make adjustments.
it takes time.

[Purpose of the invention]

An object of the present invention is to eliminate the problems of the current configuration (prior art) described above, and to make the series of adjustments described above possible or unnecessary in an assembled finished product with an upper cover.

[Summary of the invention]

The features of the present invention are that a part of the carriage is provided with a stopper on a part of the chassis (a part of the carriage is placed on a part of the chassis, making it a 00 track stopper, eliminating the need for adjustment), and that the mounting position of the 00 track sensor is fixed on the chassis. This allows adjustment to be made from the opposite side of the carriage mounting side.

[Embodiments of the invention]

An embodiment of the present invention will be described below based on the drawings.

FIG. 1 schematically shows the overall configuration of the FDD. 1
is a chassis to which each component of the device is attached. 4
is a drive device for rotating the magnetic disk 10, and a hub receiver 12 on which the magnetic disk 10 is mounted is provided at the tip of the center portion thereof. Numeral 6 is a magnetic head for writing to and reading from the magnetic disk 10, and is attached to the carriage 5 by adhesive or other means. 3
is a stepping motor for moving the magnetic head 6 (carriage 5) in parallel along the surface of the magnetic disk 10, and is connected to the carriage 5 via a steel belt 7, and the carriage 5 is slidable via a guide shaft 11. is attached to chassis 1. Further, the stepping motor 3 is attached to the chassis 1 from the side opposite to the side where the carriage 5 is attached. Reference numeral 2 is an upper cabinet for controlling each part, which is finally attached to the chassis 1 after each part is attached.

Next, the configuration of the adjustment section to which the present invention relates will be explained first starting from the current configuration.

First, head positioning adjustment is performed by adjusting the angle at which the stepping motor 3 is attached to the chassis 1. Since the stepping motor 3 is attached to the chassis 1 from the side opposite to the side where the carriage 5 is attached, adjustment is possible even after the upper rack 2 is attached.

Next, regarding the OO track stopper adjustment, when the magnetic head 6 (carriage 5) deviates from the 00 track to the outer periphery within the specified track, the cylindrical screw 13 for attaching the steel belt 7 of the stepping motor 3 to the approximately sector-shaped stopper 8.
This is done by tightening and fixing the stopper 8 to the chassis 1 with the mounting screw A14.

Finally, the 00 track detection sensor adjustment is carried out when the 00) rack detection arm 9 provided on a part of the carriage 5 crosses the detection part of the 00 track sensor 10 at a specified position.
The mounting position of the 00 track sensor 10 on the chassis 1 is adjusted so as to detect a track, and the mounting screw B15 is tightened and fixed.

Adjustment of the 00 track stopper and 00 track detection sensor is impossible after the upper part 2 is installed because the upper part 2 gets in the way.

Next, the configuration of the adjustment section according to the present invention will be explained.

First, the 00 track stopper is magnetic head 6 (
When the gear ridge 5) deviates from the 00) rack to the outer circumference within the specified track, the stopper contact portion 16 of the carriage 5
is configured so as to come into contact with a protrusion 17 provided on a part of the chassis 1. Therefore, no adjustment is necessary.

Next, the 00 track detection sensor adjustment section will be explained. 00 track sensor 10 is attached to the sensor mounting plate 18,
One side is attached by fitting the extrusion 24 into the attachment 19, and the other side is attached by tightening and fixing the attachment screw C26 from below. Next, the sensor mounting plate 18 is mounted to the chassis 1 from the side opposite to the carriage 5 mounting side via the groove B20 with the mounting screws C16 so that the extrusion 25 enters the groove A21 of the chassis 1. Groove C22 is the mounting screw C
It is for the escape of 26 heads. Also groove A21. Groove B
The reason why 20 is an elongated hole is for adjusting the movement in the track direction. This configuration is similar to the current configuration except that a 00 track detection arm 9 is provided in a part of the carriage 5.

When the mounting screw C26 on the side that identifies the sensor mounting plate 18 to the chassis 1 is loosened and the mounting screw C26 is moved and adjusted in the track direction, the sensor mounting plate 1
8 is moved and adjusted, and the position of the 00 track sensor 10 is also adjusted. Adjustment can be made from the side of the chassis 1 where the carriage 5 is attached, that is, adjustment can be made with the upper cover 2 attached.

〔Effect of the invention〕

As described above, the present invention has the following effects.

1.00) The rack stopper does not require adjustment.

2. A series of adjustments can be made in the completed state with the upper cover attached. Therefore, the process of connecting to a dummy switch becomes unnecessary, and the adjustment time is shortened.

Adjustment of the 3.00 track detection sensor can be easily done with one hand.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the overall configuration of the current FDD, Fig. 2 is a diagram showing the structure of the current 00 track stopper adjustment and 00-track detection sensor adjustment section, and Fig. 3 is the 00) rack stopper section according to the present invention. FIG. 4 is a perspective view showing the structure of the 00 track detection sensor and adjustment section, and FIG. 4 is a view from A in FIG. 3. DESCRIPTION OF SYMBOLS 1... Chassis, 4... Drive device, 5... Carriage, 6... Magnetic head, 9...00 Track detection arm, 10...00 Track sensor, 12... Hub holder, 16...Stopper contact portion, 17...Protrusion,
18...Sensor 1st drawing Z diagram

Claims (1)

[Claims] 1. A drive device for rotationally driving a magnetic disk and a magnetic head for writing and reading data on the magnetic disk are provided above and below or on one side of the carriage, and a hub holder is provided at the tip of the drive device, In a magnetic disk drive device in which a magnetic disk is mounted and the magnetic head is moved parallel to the surface of the magnetic disk, a part of the carriage is placed against a stopper provided in a part of the chassis, and the carriage (magnetic head) is moved. 00 to prevent movement beyond a specified track to the outer circumference from the 00 track, and to detect the 00 track.
A magnetic disk drive device characterized in that a track sensor is fixed to a sensor mounting plate, and the sensor mounting plate is mounted on a chassis so that the track direction can be finely adjusted from the side opposite to the carriage mounting side. 2. In claim 1, when the screw that attaches the sensor mounting plate to the chassis is loosened and the screw is moved and adjusted in the track direction, the sensor mounting plate (00 track sensor) is moved and adjusted in conjunction with this. A magnetic disk drive device characterized by: