JPH05325436A - Information recording/reproducing head carriage mechanism - Google Patents

Abstract

PURPOSE:To provide the information recording/reproducing head carriage by which resonance is decreased to the utmost, and resonance peak can be minimized even if resonance is generated, and capable of smoothly advancing along guide rails without increasing the weight of a movable part so as to shorten the moving time. CONSTITUTION:In the information recording/reproducing head carriage provided with a carriage 7 for loading an information recording/reproducing head, and a bearing 13 fixed to the carriage 7 through elastic body 16 in order to carry the carriage 7 along guide rails 8, 9, damper 15 is added to a connecting part of the elastic body 16 between the carriage 7 and the bearing 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording / reproducing head carriage mechanism.

[0002]

2. Description of the Related Art Recent developments in information recording / reproducing devices have been remarkable, and have come to be used in all industrial fields and homes.

The information recording / reproducing apparatus is provided with a cartridge holder in the apparatus frame, in which a magneto-optical disk cartridge is set and rotationally driven.

FIG. 6 is a side view of a conventional carriage 50.

An information recording / reproducing head carriage (hereinafter referred to as a carriage) in which an information recording / reproducing head (hereinafter referred to as a head) is moved and a carriage mechanism is mounted with the head.
50 and a sliding member or bearing attached to the carriage for conveying the carriage in a predetermined direction along the guide rail.

Smooth movement of the carriage along the guide rails is important for reasons such as shortening of access time. However, since it is difficult to correctly attach the two guide rails in parallel to each other, the weight and center of gravity of the carriage, the magnitude of the frictional resistance between the bearing and the guide rail, the force point thereof, and the driving force of the carriage 50. It may be difficult to smoothly move on the guide rail due to the occurrence of resonance related to the size of the line and its action line. In that case, the access time becomes long. In order to prevent this, the following measures have been conventionally taken.

The carriage 50 is provided with six sliding members or bearings 51 (only two at the top and bottom in FIG. 6) so that the carriage 50 can move smoothly along the guide rails 49. The bearing 51 sandwiches two guide rails 49 from above and below and slides along them. ..

In Conventional Example 2 shown in FIG. 6, one of bearings 51, which is a sliding member, is an elastic body 54 such as stainless steel.
The other bearing 51 is directly connected to the carriage 50. This is because all of the bearings 51 are always in contact with the guide rails, so that the carriage 50 can be moved smoothly.

FIGS. 7 and 8 are sectional views of a part of a conventional carriage used in a high-end machine.

The carriage 50 is composed of an upper body 50a and a lower body 50b. Between the upper body 50a and the lower body 50b, which are not in direct contact with each other as in the conventional example shown in FIG. A ball 53 is provided, and the spring 52 biases the lower body 50b toward the upper body 50a. The lower body 50b becomes rotatable around the steel ball 53,
The bearing 51 is pressed against the guide rail 49 by the elastic force of the spring 52. This is all bearing 5
1 always comes into contact with the guide rail, so that the carriage 50
This is for smooth sliding.

[0011]

In each of the above-mentioned conventional examples, the carriage is devised so that it can slide smoothly on the guide rails without causing vibrations. However, these can obtain sufficiently satisfactory results. I couldn't do that.

There is also a device in which a weight is added to the carriage and the center of gravity of the carriage is moved for balancing so that resonance does not occur. However, the weight of the weight makes the entire carriage heavier and shortens the access time. There is a drawback that prevents the conversion.

The present invention has been made in view of the above points, and it is possible to reduce the resonance as much as possible, to suppress the resonance peak even if the resonance occurs, and to increase the weight of the movable part. It is an object of the present invention to provide an information recording / reproducing head carriage which can be smoothly moved along a guide rail and can be shortened in access time.

[0014]

In order to solve the above-mentioned problems, the present invention is directed to a carriage for mounting an information recording / reproducing head, and a carriage fixed to the carriage for conveying the carriage along a guide rail. In the information recording / reproducing head carriage including the bearing, a damper is added to the carriage and the elastic body or the connecting portion of the bearing and the elastic body between the carriage and the bearing.

Further, the present invention comprises a carriage comprising a divided body on which an information recording / reproducing head is mounted, and a bearing fixed to each divided body of the carriage for carrying the carriage along a guide rail. In the information recording / reproducing head carriage mechanism in which the divided bodies are connected by an elastic body, a damper is overlapped on the elastic body between the divided bodies of the carriage.

[0016]

[Function] By adding a damper to the connecting portion of the carriage between the upper body and the lower body by the elastic body or the connecting portion between the carriage and the bearing by the elastic body, the resonance of the carriage is eliminated or greatly reduced. To do.

[0017]

The present invention will be described with reference to the drawings.

1 to 5 are plan views showing a schematic structure of an information recording / reproducing head carriage of the present invention and an information recording / reproducing apparatus having the same.

A cartridge holder 2 is provided in the device frame 1. A magneto-optical disk cartridge 3 having information is set in the cartridge holder 2. The magneto-optical disk cartridge 3 is rotationally driven by the driving means 4.

A laser beam incidence means 5 including a semiconductor laser 5a, an objective lens 5b, an actuator 5c, etc. is provided. The objective lens 5b focuses the laser light on the magneto-optical disk, and the actuator 5c causes the spot of the laser light to follow the track of the magneto-optical disk.

The reflected light detecting means 6 for detecting the reflected light from the magneto-optical disk comprises an objective lens, an actuator, a light detecting element 6a and the like which are common to the laser light incident means 5.

A carriage 7 provided with a head for reading / writing data from / on an information recording medium is equipped with a laser light incidence means 5 and a reflected light detection means, and is mounted on a first guide rail 8 and a second guide rail 9. Along the track, the actuator moves to a track position on the magneto-optical disk so that the laser light can be followed by the actuator.

The carriage 7 is driven by the carriage moving means 10. The carriage moving means 10 is composed of a drive coil 10a provided on both sides of the carriage 7 and a magnetic circuit 10b provided along the first and second guide rails 8 and 9.

A bias magnetic field is applied to the magneto-optical disk by the magnetic field generating means 11.

An embodiment of the present invention in which the carriage 7 is constructed so as to move smoothly along the guide rails 8 and 9 without causing sharp peak resonance will be described below.

In the embodiment of the carriage mechanism according to the present invention shown in FIG. 2, one of the bearings 13 is replaced by the elastic body 1.
The bearing 13 is always in contact with the guide rails 8 and 9 so that the carriage advances smoothly. Although this structure has been conventionally available, in the present invention, the vibration of the carriage 7 is damped by further interposing the damper 15 at the connecting portion between the carriage 7 and the elastic body 16.

The carriage mechanism according to the present invention shown in FIGS. 1, 3 and 4 is used in a high-end machine, and in this embodiment, the carriage 7 is composed of an upper body 7a and a lower body 7b. Two pairs of bearings 12 are rotatably attached to the upper body 7a, which abut on the guide rail 9 so as to sandwich the guide rail 9 from above and below. Further, a guide rail 8 is provided on the upper body 7a.
A bearing 14a, which comes into contact with the above from an obliquely upper position, is rotatably attached. Shaft 1 penetrating lower body 7b
8 extends, and the shaft 18 penetrates the upper body a. Further, a spring 22 surrounding the shaft 18
Urges the lower body 7b toward the upper body 7a. The lower body 7b is rotatable around a steel ball 23, and the bearing 14b attached to the lower body 7b by the urging force of the spring 22 is connected to the guide rail 8b.
Is pressed against. Although such a structure has existed conventionally, in the present invention, the upper body 7a and the lower body 7b are further added.
By interposing the damper 15 between the above and the above, the vibration of the carriage 7 is damped.

[0028]

The carriage and bearing of the information recording / reproducing head carriage mechanism are connected by interposing the elastic body and the damper between them, and the carriage main body is divided into two parts and the elastic body is superposed with the damper therebetween. Therefore, even if resonance occurs in the carriage mechanism, its peak can be lowered, and design restrictions such as weight balance can be greatly reduced. In addition, the parts such as the bearing shaft, the bearing, and the guide bar that may cause resonance can be downsized, and thus the information recording / reproducing apparatus can be downsized.

[Brief description of drawings]

FIG. 1 is a perspective view of an information recording / reproducing head carriage mechanism of the present invention.

FIG. 2 is a side view of an information recording / reproducing head carriage mechanism of the present invention.

FIG. 3 is a side view of an information recording / reproducing head carriage mechanism of the present invention.

FIG. 4 is a sectional view of a portion of the information recording / reproducing head carriage mechanism of the present invention.

FIG. 5 is a plan view showing a schematic configuration of an information recording / reproducing apparatus having an information recording / reproducing head carriage mechanism of the present invention.

FIG. 6 is a side view of a conventional information recording / reproducing head carriage mechanism.

FIG. 7: 1 of conventional information recording / reproducing head carriage mechanism
It is a sectional view of a part.

FIG. 8: 1 of conventional information recording / reproducing head carriage mechanism
It is a sectional view of a part.

[Explanation of symbols]

 7 Carriage 8 Guide Rail 9 Guide Rail 12 Bearing 13 Bearing 14a Bearing 14b Bearing 15 Damper 16 Elastic Body

Claims (2)

[Claims] 1. An information recording / reproducing head carriage comprising: a carriage on which an information recording / reproducing head is mounted; and a bearing fixed to the carriage via an elastic body to convey the carriage along a guide rail. An information recording / reproducing head carriage mechanism characterized in that a damper is added to a connecting portion between the carriage and the elastic body or between the bearing and the elastic body between the carriage and the bearing. 2. A divided body of the carriage, comprising: a carriage formed of a divided body on which an information recording / reproducing head is mounted; and a bearing fixed to each divided body of the carriage for conveying the carriage along a guide rail. In an information recording / reproducing head carriage mechanism in which elastic members are connected to each other, a damper is added between the divided bodies of the carriage so as to overlap the elastic body.