JPS60258774A - Magnetic head driver - Google Patents

Abstract

PURPOSE:To fix a belt to a head carriage without requiring much labor and time by supporting the head carriage to a guide member freely reciporcatedly, and fixing both ends of the belt to the head carriage with one locking member. CONSTITUTION:Since both ends of the steel belt 8 are fixed to the head carriage 2 by one locking member 9, the locking member 9 plas a role of a lock and the steel belt 8 is fixed to the head carriage 2 in a proper state without deformation and elongation. A proper tension is given always to the steel belt 8, the turning angle of the pulley 6 is delivered accurately as the slide distance of the head carriage 2 and highly accurate scanning of the magnetic head 3 is attained. Since the slide resistance is obtained by pressing the locking member 9 into contact with the guide plate 11 provided to the frame, the magnetic head 3 is not rocked, smooth scanning is attained and an error in the azimuth angle of the magnetic head 3 is prevented.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention uses a magnetic head that records and reproduces information on a rotating hunting sheet or magnetic disk to scan in the radial direction of a magnetic disk or magnetic disk. The present invention relates to an improvement in a driving device for driving.

<Prior art> There are magnetic recording and reproducing devices that use magnetic sheets or magnetic disks. These devices scan the magnetic sheet or magnetic disk in the radial direction with a magnetic head that is in sliding contact with the magnetic sheet or magnetic disk that rotates at high speed. Image information, audio information, various numerical information, etc. are converted into magnetic signals, recorded on a magnetic sheet or magnetic disk, and then reproduced. In recording and reproducing devices using magnetic sheets and magnetic disks, since a lot of information is recorded at high density on the magnetic sheets and magnetic disks, the magnetic head must be scanned and positioned with high precision with respect to the magnetic sheets and magnetic disks. This is required.

Conventionally, there are various types of driving devices for scanning and positioning this magnetic head, and one of them is one that uses a steel belt.

This supports a head caliper that holds a magnetic head so that it can slide back and forth on a kite shaft, wraps a steel belt around a pulley that is rotationally driven by a drive motor, and attaches a 7)' = T-yaring to this steel belt. The steel belt is stretched along the direction of movement of the head carriage, and both ends of the steel belt are fixed to the head carriage. This device rotates a pulley to move the longitudinal position of a steel belt wound around the pulley, thereby driving the head carriage along a guide shaft.

In a drive device using such a belt, the state in which the belt is attached to the head carriage has a direct effect on the scanning accuracy of the magnetic head. Must be mounted along the direction of carriage movement.

However, in the past, the belt was generally fixed to the hend carriage by screws through a holding member such as a wand, so during the screw tightening process, the steel There was a risk that the belt would be twisted and deformed, causing it to stretch.

Therefore, as a countermeasure to the above-mentioned problem, the present practice is to provide a bottle protruding from the head carriage that penetrates the holding member of the steel belt to prevent the holding member from shifting, thereby preventing deformation and elongation of the steel belt. However, with such measures, it is necessary to provide pins and screw holes that have a highly accurate positional relationship with the head carriage, which requires a lot of labor and time for assembly, resulting in high costs. , it was not a reasonable measure.

<Objective of the Invention> The present invention has been made in view of the above circumstances, and provides a magnetic head drive device in which both ends of the belt can be easily fixed to a head carriage without the belt being twisted and deformed or stretched. It is an object of the present invention to enable a belt to be fixed to a head carriage in a normal state without requiring much labor and time for assembly.

<Structure of the Invention> The structure of the present invention to achieve the above object is that the head carriage is attached to a head carriage, moves in the radial direction with respect to a magnetic diskette housed in a magnetic sheet puncture, and records data on the magnetic diskette. Alternatively, in a drive device for a magnetic head that performs reproduction, the head carriage is supported by a guide member so as to be able to reciprocate, is integrally attached to a pulley that is driven by a drive source for multiple rotations, and is attached to a hend carriage, and furthermore, both ends of the belt are attached to a pulley. The head carriage is fixed to the head carriage by one locking member.

<Effects of the Invention> According to the magnetic head drive device of the present invention, both ends of the belt are
Since the belt is fixed to the head carriage by two locking members, the locking members serve to prevent the belt from rotating, and the belt can be tensioned on the head carriage without deformation or stretching. In addition, by bringing the locking member into contact with the frame of the magnetic head drive device or the like via a lubricating member, it is possible to prevent the device from swinging and to prevent the unmass angle of the magnetic head from being out of alignment.

<Embodiment> An embodiment of the magnetic head drive device according to the present invention will be described in detail below with reference to the drawings. A.

FIG. 1 is a perspective view of the entire magnetic head drive device according to an embodiment of the present invention, FIG. 2 is a perspective view of the belt drive section in FIG. 1, and FIG. 3 is a perspective view of another mechanism for applying tension to the belt. It is a perspective view showing the aspect.

Two kite shafts 1 which are parallel to each other are provided in 7 frames (not shown) of the magnetic recording/reproducing device, and the radial direction of the guide shaft 1 and the magnetic sheet or magnetic disk (not shown) are parallel to each other. . A head carriage 2 is supported on the guide shaft 1 so as to be able to freely reciprocate, and the head carriage 2 holds a magnetic head 3 that comes into sliding contact with a magnetic disk and a magnetic disc. As the head carriage 2 slides, the magnetic head 3 scans the magnetic disk and the magnetic disk in the radial direction.
Various types of information are recorded on these magnetic sheets or magnetic disks, and then played back.

Kite Il! A wide dogleg part 4 and a narrow small groove s5 are formed adjacent to each other on the side surface 2a of the head carriage 2 parallel to 1I11.
A pulley 6 having a rotating shaft in a direction perpendicular to the direction is provided. This nori 61d is connected to a drive source (not shown) and is driven and rotated. A steel belt 8 bifurcated at the center of the pulley 6 is integrally wound so as to be drivable. is provided parallel to the moving direction of the head carriage 2, and both ends thereof are
It is fixed by one locking member 9 with screws 10 and 10.

The locking member 9 consists of two locking portions 9a that hold down the steel belt 8, and a leaf spring portion 9b that connects the locking portions 9a and applies a pressing force to the kite plate 11 provided on the frame. A lubricating member 12 is provided at the contact portion of the leaf spring portion 9b with the kite plate 11.

In the magnetic head drive device according to the present invention, the driving force for moving the head carriage 2t'' along the guide@1.1 is applied to the single force guide shaft side, so the driving force is applied to the head carriage 2. A rocking force acts to cause the side that has been moved to lead, that is, to tilt the head carriage 2 from the direction of movement within the plane formed by the guide shafts 1, 1.

In this embodiment, the locking member 9 holds down the steel belt 8, and also so that when the carriage 2 slides, the magnetic hand 3 moves straight without moving in a zigzag manner with respect to the guide shafts 1, 1. Head carriage 2 is guide 4
In order to offset the sliding resistance directly received by the drive source, the pulley 6, that is, the point of application of the driving force, is narrowed and the locking member 9 is pressed against the guide plate 1 to reduce the sliding resistance as a counterbalance against the driving source. The structure is such that the swinging force is reduced or eliminated.

In addition, in this embodiment, the engaging member 9 prevents the head carriage 2 from pivoting (in the direction of the arrow in FIG. 1) on the guide shaft on the side to which the driving force is applied. Since it also serves as a member, the amount of protrusion of the magnetic hand 3 relative to the magnetic note is accurately defined without fluctuation.

First, a steel belt 8 is attached to the locking member 9 on the small neck portion 5 side.
A tension spring part 9C is integrally formed to apply the necessary tension by pressing the steel belt 8 to the small groove part 5, and when the steel belt 8 moves relatively due to the rotation of the pulley 6 and the head carriage 2 slides, the steel belt 8 This prevents the scanning accuracy of the magnetic hand 3 from deteriorating due to bending. Furthermore, steel belt 8
In addition to this mechanism, as shown in FIG. 3, a mechanism for applying tension to the next bin 13.
Alternatively, a fixed coil spring 15 may be used to wrap around the coil spring 15, and a roller 16 attached to the coil spring 15 may press the sister belt 8 toward the small wing portion.

In the above embodiment, the plate spring portion 9b is provided on the locking member 9 to also have the role of providing a barrier and dynamic resistance by contacting the guide plate 11, but the two locking portions 9a are integrally formed. If so, the invention is not limited to the above embodiments.

As has been fraudulently explained based on the embodiments above.

In the magnetic head drive device having the above configuration, the steel belt 8
Since both ends of the head are fixed to the hend carriage 2 by a single locking member 9, the locking member 9 serves as a rotation stopper, and the steel belt 8 is held in an appropriate state without deformation or stretching. It comes to be fixed to the carriage 2.

The magnetic head 3 is transmitted accurately as the sliding distance, and the magnetic hand 3 is scanned with high viscosity. Further, in the above embodiment, the locking portion 9
Since the sliding resistance is obtained by making contact with the guide plate 11 provided on the frame, the sliding resistance that the V ridge 2 which narrows the pulley 6 receives from the guide shaft is canceled out, and the magnetic head 3 Smooth scanning can be performed without swinging, and there is no possibility that the azimuth angle of the magnetic head 3 will be out of order.

[Brief explanation of the drawing]

FIG. 1 is an overall perspective view of a magnetic head drive device according to an embodiment of the present invention, FIG. 2 is a partial perspective view of the belt drive section in FIG. 1, and FIG. 3 is a mechanism for applying tension to the belt. FIG. 1 in the drawing is the guide shaft. 2 is a belly button carriage, 3 is a magnetic head, and 4 is a large groove. 5 is Kotakebu. 6 is a pulley. 8 is Snarlbelt. 9 is a locking member. Patent applicant: Fuji Photo Film Co., Ltd. Fuji'4. Shinkoki Co., Ltd.

Claims (1)

[Claims] In a magnetic head driving device that is attached to a head carriage and moves in a radial direction with respect to a magnetic sheet housed in a magnetic sheet pack to perform recording or reproduction on a magnetic sheet, the head carriage is attached to a guide member. A pulley supported in a reciprocally slidable manner and driven by a drive source for multiple rotations is attached to the hend carriage, and both ends of the belt are fixed to the hend carriage by one locking member. magnetic head drive device.