JPH044678B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a head transfer device that can be used in optical recording/reproducing devices and the like.

2. Description of the Related Art In recent years, disk files have been put into practical use as information recording media in which access for recording and reproduction can be arbitrarily selected. In these devices, improvements in recording density and precision in operation are particularly required.

A conventional writing/reading head feeding device which seeks to improve operational accuracy will now be described with reference to the drawings. As shown in FIGS. 4, 5, and 6, there is a transfer table 2 to which the write/read head 1 is attached, guide shafts 3a and 3b that guide the transfer table in a predetermined direction, and a transfer table 2. A driving means 6 is provided which engages with the rotation of the pulse motor 4 to drive the transfer table 2 in a predetermined direction via the screw screw 5. A spring 7 is provided on the drive transmission path of the drive means 6 as a backlash prevention means for biasing the transfer table 2 in one direction. In this case, the play space interposed in the means for converting the rotation of the pulse motor into the driving direction of the transfer table impedes the accuracy of the movement, and together with the vibration caused by the impulsive transmission of the movement, the accuracy is reduced. As a means of overcoming the above-mentioned obstacles, a spring is used to bias the transfer table in one direction on the drive transmission path to prevent rattling.

Problems to be Solved by the Invention As described above, in the rattling prevention means in which a spring is used on the drive transmission path to bias the transfer table in one direction, the motor is operated correctly in order to access the record at an arbitrary position on the disk.・It rotates in both opposite directions, and in order for the drive transmission means that is biased in one direction to move in the opposite direction when it rotates in the opposite direction, it first rotates through the play space and then comes into contact with the next transmission means, which can be harmful. There is a problem of impact.

The present invention solves these conventional problems, and provides a head transfer device that has a simple structure, absorbs slight vibrations and shocks generated in the drive section of the transfer table, and enables highly accurate tracing. It provides:

Means for Solving the Problems The head transfer device of the present invention has an armature coil attached to one end so as to be part of a linear motor.
This head transfer device is provided with a head housing at the other end, connected in the middle by a plurality of hollow structural parts, and in which the hollow part of the honeycomb structure is filled with a substance that absorbs vibration energy, such as vibration-proof rubber.

Function In the head transfer device of the present invention, armature coils forming a part of a linear motor are attached to both ends of the transfer table, and the other end is provided with a head housing, so that the driving part of the transfer table and the head housing can be connected to each other. By increasing the distance and connecting them with multiple hollow structures, the micro vibrations and micro shocks generated in the drive part are dispersed, and vibration energy such as anti-vibration rubber is transferred to the hollow parts of the multiple hollow structures. It is filled with an absorbing material to greatly reduce the transmission of vibrations and shocks to the head housing.

Embodiment A head transfer device according to an embodiment of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1, 2, and 3, the base 11
A motor 12 attached to the head 15 directs light from a laser light source onto the disk 14. A large number of bits are lined up on the disk 14, and records are expressed by changes in bit length and intervals. The device picks up the reflection of light that hits the bits on the disk 14 and plays back audio and video.In order to move the head 15 to a desired position in order to play back any recording on the disk 14, a transfer table 16 is used. Attach it to one end of the An armature coil 17 is attached to the other end of the transfer table to form part of a linear motor. The head mounting and the linear motor section are connected by a plurality of hollow structures, and the hollow sections 18 of this honeycomb structure are filled with a material that absorbs vibration energy, such as vibration isolating rubber 19. The transfer table 16 uses bearings 20 to ensure smooth transfer, and the field section 21 of the linear motor is fixed to the base 11.

With this configuration, there are multiple hollow structures between the head mounting part and the linear motor part, so the slight vibrations and shocks of the linear motor part are dispersed by the plural hollow structures, and are further distributed to the hollow parts of the plural hollow structures. By filling it with a material that absorbs vibration energy, such as vibration-proof rubber, the vibrations generated by the linear motor of the drive section can be further reduced. Furthermore, by making the distance between the drive part and the head mounting part as long as possible,
This can enhance the anti-vibration effect.

Effects of the Invention As described above, according to the head transfer device of the present invention, an armature coil is attached to one end of the transfer table to form a part of a linear motor, a head is attached to the other end, and a honeycomb structure is formed between them. By filling the hollow parts of the multiple hollow structures with a material that absorbs vibration energy, such as vibration-proof rubber, the distance from the linear motor part, that is, the drive part of the transfer table to the head can be increased, and the distance between them can be increased. By combining multiple hollow structures, the vibrations of the drive part are dispersed, and by filling the multiple hollow parts with a material that absorbs vibration energy, such as anti-vibration rubber, we have reduced the weight, ensured rigidity, and created an even finer structure. It is possible to obtain a head transfer device that can absorb vibrations and slight shocks and improve the tracing performance of the head.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of a transfer table according to an embodiment of the present invention, Fig. 2 is a plan view of the same, Fig. 3 is a sectional view of the same side, and Figs. 4, 5, and 6 show a transfer device in a conventional example. FIG. 16... Transfer table, 17... Armature coil of linear motor, 18... Hollow part of honeycomb structure, 19
... Anti-vibration rubber.

Claims (1)

[Claims] 1. An armature coil is attached to one end to make it part of the linear motor, and the other end is equipped with a head housing for mounting an optical head. The intermediate part of the transfer table is movably supported on the base via a bearing. The head transfer device has a structure in which the intermediate portion of the transfer table is divided into a plurality of hollow portions in a width direction perpendicular to the driving direction of the linear motor, and the hollow portions are filled with a material absorbing vibration energy such as vibration-proof rubber.