JP2805092B2 - Disk drive device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a disk drive device.

[Summary of the Invention] The present invention relates to a disk drive device, and in particular, a track position detection sensor (00 sensor) for detecting a reference track position (00 position) of a disk is provided on the head carriage side, and The signal is taken into the amplifier etc. on the chassis side by the harness for the head output signal, so that the harness for the head output signal and the harness for the track position detection sensor are integrated (shared), and parts It is possible to reduce the number of points and the number of assembling steps, simplify the structure, and the like.

[Prior Art] As shown in FIG. 3, in a conventional disk drive device, a photocoupler 102 as a track position detection sensor is mounted on a chassis 101 side, and a light shielding plate 104 as a detected part is mounted on a head carriage 103 side. , The head carriage 1
According to 03, when the head 105 has moved to the reference track position on the outermost periphery of the disk, the light shielding plate 104 enters the concave portion 106 of the photocoupler 102, detects the reference track position, and outputs a signal for the photocoupler. Harness and lead wire
At 107, it is taken into the chassis 101 side.

 Reference numerals 108 and 109 denote upper and lower head signal harnesses.

[Problems to be Solved by the Invention] By the way, in the above-mentioned conventional disk drive device, a photocoupler is used by using a photocoupler harness and a lead wire 107 which are independent from the upper and lower head signal harnesses 108 and 109. The configuration described below takes in the signal of 102, and thus has the following problems.

(1) Since the harness for the photocoupler and the lead wire 107 are used in addition to the harnesses 108 and 109 for the head signal, the number of parts increases accordingly.

(2) One end of the harness or lead wire 107 for the photocoupler must be connected to the photocoupler 102, and the other end must be connected to the chassis 101 via the connector 110 or the like, which complicates the connection work.

In particular, when the connector 110 is used, the chassis 101
A connector insertion portion must be provided on the side, which increases the number of components and is subject to space restrictions.

The present invention is intended to solve the above-mentioned conventional problems by providing a harness for a head signal with a function of a harness for a track position detection sensor.

Means for Solving the Problems A chassis, a head carriage movably provided with respect to the chassis and holding a head, and a track for detecting a positional relationship between the head and a track on the disk-shaped recording medium In the disk drive device provided with a device detection unit, the track position detection unit includes an electrically driven track position detection sensor, and a detected portion whose position is detected by the sensor. The track position detection sensor is provided with the detected portion on the chassis side, and a signal of the track position detection sensor and a head signal for the head are taken into the chassis side via the same portable cable.

Embodiment Next, a disk drive device of the present invention will be described with reference to FIGS.

Reference numeral 1 denotes a floppy disk drive device provided with a track position detecting means for detecting a positional relationship between a head and tracks on a disk-shaped recording medium (hereinafter, referred to as a disk), and a disk having a floppy disk cartridge 2 provided on a front bezel 3. When the floppy disk cartridge 2 is inserted from the insertion slot 4, the insertion opening
The floppy disk cartridge 2 enters the cartridge holder 7 attached to the chassis 6 by so-called escape rotation, and is opened and closed by the shutter opening / closing arm 8 provided on the upper surface of the cartridge holder 7. When the shutter 9 is opened and the floppy disk cartridge 2 is inserted to a predetermined position, the floppy disk cartridge 2 descends together with the cartridge holder 7, and the hub 11 of the floppy disk 10 in the floppy disk cartridge 2
The chuck is chucked on a turntable 12 provided at the, and rotates together with the turntable 12.

A head carriage 13 is slidably mounted on the chassis 6.

The head carriage 13 is provided with a head arm 15 that pivots vertically with a pivot 14 as a fulcrum,
An upper head is attached to the distal end (the distal end side of the head arm 15 is broken in FIG. 1 and is not shown together with the upper head), and the head carriage 13 at a position facing the head is On the upper surface, a lower head 16 is provided.

The head arm 15 is mounted on the cartridge holder 7.
Is raised by the upper surface plate of the cartridge holder 7 so as not to hinder the insertion of the floppy disk cartridge 2 and to insert the floppy disk cartridge 2 into the cartridge holder 7. When the cartridge holder 7 is lowered, the head arm 15 is also lowered, and the floppy disk 10 is moved between the upper head attached to the tip of the cartridge holder 7 and the lower head 16 attached to the tip of the head carriage 13. It is designed to sandwich it.

Then, with the floppy disk 10 sandwiched between these heads, the head carriage 13 is moved to the floppy disk.
The recording / reproducing is performed by moving the signal recorded on the floppy disk 10 to the chassis 6 by a head signal harness (hereinafter referred to as a portable cable) 17 by moving the disk from the radially outer side to the inner side of the disk 10. Has become.

The track position detecting means for detecting the positional relationship between the head and the tracks on the disk is constituted by an electrically driven track position detecting sensor 18 and a detected portion 19 whose position is detected by the sensor 18. I have. The track position detection sensor 18 is attached to the head carriage 13. A photocoupler is used for the track position detection sensor 18, and the head is a floppy disk.
When it has moved to the position of 10:00, the light-shielding plate as the detected portion 19 provided on the chassis 6 enters the concave portion 20 of the photocoupler as the track position detection sensor 18 to detect the position of the head or the like, and the signal thereof is transmitted. The head signal is taken into the chassis 6 through the portable cable 17 for the head signal.

The light shielding plate as the detected portion 19 is a head carriage 13
Is formed integrally with a guide shaft holding plate 22 that holds the slide guide shaft 21.

As shown in FIG. 2, the guide shaft presser plate 22 is configured to be mounted on the chassis 6 by a set screw 23, and a screw support provided on the guide shaft presser plate 22 for inserting the set screw 23 is provided. The hole 24 is formed in a long hole parallel to the length direction of the slide guide shaft 21, and can be displaced in the axial direction of the slide guide shaft 21 within the length of the long hole. I have.

A U-shaped recess 26 for inserting an eccentric driver 25 as a guide shaft holding plate position adjuster is formed at one end of the guide shaft holding plate 22, and the guide shaft holding plate 22 is located in the recess 26. In this state, a driver receiving hole 27 is formed in the chassis 6.

Then, an eccentric shaft 29 provided on the lower surface of the circular cam 28 of the eccentric driver 25 is inserted into the driver receiving hole 27, and the circular cam 28 is rotated right and left around the eccentric shaft 29. The guide shaft presser plate 22 is displaced to the left and right with
The position of the light shielding plate is adjusted.

Needless to say, the portable signal cable 17 for the head signal is integrally formed with a lead portion for receiving the signal from the track position detection sensor 18 into the chassis 6 side.

One end of the portable cable 17 for the head signal is connected to the lower head 16, an intermediate part thereof is connected to the track position detection sensor 18, and a connector 30 is provided at the other end.
Are connected to the chassis 6 via the connector 30. Reference numeral 31 denotes a portable cable for the upper head.

Since the disk drive device 1 of the embodiment has the configuration as described above, the set screw 24 is loosened and the eccentric driver
With 25, the position of the 00 track can be adjusted by moving the guide shaft holding plate 22 and the light shielding plate provided as the detected portion 19 provided on the guide shaft holding plate 22. And after adjusting the position, set screw 24
The guide shaft holding plate 22 may be fixed on the chassis 6 by tightening the screw (by controlling the torque of the set screw 24, it becomes unnecessary to tighten the set screw after the position adjustment).

In the embodiment shown in the drawings, a part of the guide shaft holding plate 22 is cut and raised, and the light shielding plate as the detected portion 19 is changed to the guide shaft holding plate 22.
Although the case where it is integrally formed is shown, a configuration in which a light shielding plate is attached to the guide shaft holding plate 22 may be adopted.

Further, the light shielding portion as the detected portion 19 does not necessarily need to be provided on the guide shaft holding plate 22.

Also, the track position detection sensor 18 is not limited to a photocoupler.

[Effects of the Invention] As described above, according to the present invention, a track position detection sensor is mounted on a head carriage, a detected portion is mounted on a chassis side, and a signal of the sensor is transmitted to a chassis side by a portable cable for head signals. The following effects can be obtained by taking in the data.

(1) Since the portable cable for the head output signal and the portable cable for the track position detection sensor are shared, the number of parts can be reduced and the cost can be reduced. In addition, since the above-mentioned portable cable is integrated, only one connector for connecting the portable cable to the chassis side is required, and a portable cable for the head signal and a portable cable for the track position detection sensor as before. Therefore, it is not necessary to separately attach connectors, and cost can be reduced accordingly.

(2) A light-shielding plate or the like as a portion to be detected can be easily formed by, for example, cutting and raising a part of the guide shaft pressing plate. In addition, since it is not necessary to connect the detected part to the control circuit board on the chassis side by a lead wire or the like, the number of parts and the number of assembly steps can be reduced accordingly.

(3) It is easy to cope with a substrate mounted above or below as in a thin and thick dual-purpose chassis.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a disk drive device of the present invention,
FIG. 2 is an enlarged perspective view of a main part, and FIG. 3 is a perspective view of a conventional example. 1 ... Disk drive device, 17 ... Portable cable for head signal, 18 ... Track position detection sensor, 19 ...
Detected part.

Claims (1)

(57) [Claims] 1. A chassis, a head carriage movably provided with respect to the chassis and holding a head, and track device detecting means for detecting a positional relationship between the head and a track on the disk-shaped recording medium. Wherein the track position detection means includes an electrically driven track position detection sensor, and a detected part whose position is detected by the sensor; and the head carriage has the track position detection sensor. Wherein the detected portion is provided on the chassis side, and a signal of the track position detection sensor and a head signal for the head are taken into the chassis side via the same portable cable. Drive device.