SU801092A1 - Device for rotating flexible disk - Google Patents

Description

54) DEVICE FOR TURNING A FLEXIBLE DISK

one

The invention relates to instrumentation, namely, devices used as readout and indication means.

A device is known comprising a disk with a flexible gasket fixed to a rotating shaft and a vibration transducer associated with it mounted at an angle to the surface of the disk and carried out its periodic rotation by pushing 1.

However, the known device does not provide a high accuracy of the pitch of turning the disc, since the interaction between the disc and the pusher occurs due to the forces of friction.

It is also known a device for periodically rotating a disk, comprising a disk rotating unit and a fixing unit e, which is a ratchet mechanism:.

The disadvantages of the ratchet mechanism are the difficulty of ensuring accurate small disk movements, as well as the readjustment of the device to another pitch. In addition, the ratchet mechanism contains several kinematics, introduced during wear

errors that affect the accuracy of the rotation angle.

The purpose of the invention is to improve the accuracy of small angular displacements.

The goal is achieved by the fact that in a device for rotating a flexible disk fixed on the axis of rotation, containing a rotating unit of the flexible disk, its fixing unit and a control unit, the rotating unit contains a corrugator, on either side of which are fixed fixing contact clamps and electrically connected with

5 by the corrugator through the control unit.

To provide greater smoothness of rotation and preserve the configuration of the floppy disk, it can be equipped with

0 radially arranged corrugation, made with perforations, as well as with a hole in which a reamer is installed, connecting it with the axis of rotation.

five

FIG. 1-4 depict possible variants of the proposed device for rotating a floppy disk.

The device (Fig. 1) contains a flexible disk 1 fixed on the axis 2 of rotation, a turning unit consisting of a corrugator 3 connected to a drive (not shown in the drawing) and located on both sides of it contact clamps 4 and 5 associated with the respective drives (not shown in the drawing) and the same control unit as the corrugator 6.

The floppy disk 1 is made with perforation 7, and the contact clamps 4 and 5 are conical. The flexible disk 1 may be provided with a radially arranged corrugation 8 (Fig. 2) or have an opening 9 in which a jumper 10 is installed, connecting it with the axis 2 of rotation (Fig. 3).

In the device, the flexible disk 1 is fixed in its initial position from the node 4 of rotation by a retainer that enters the hole 7 of the perforation, while the corrugator 3 and the second contact retainer 5 are also retracted from the disk.

When a signal is sent from the control block b, the drive moves the corrugator 3 before it interacts with the floppy disk 1 and the disk deforms to form a corrugated corrugation (shown in dotted lines in Fig. 1). which leads to the appearance of resistance forces tending to turn the disk around axis 2, the corrugation.

Then, according to the signal of the control block b, the contact latch 5 moves and fixes the entrance to the hole 7 of the perforation, the flexible disk 1 in the deformed state. After that, the contact latch 4 and the corrugator 3 are returned to the initial state, thanks to the corresponding drives triggered by signals from the control unit 6. Simultaneously with the unclamping of the disk, the corrugation and the movement of a part of the flexible disk 1, which is a corrugation, occur around the axis 2 under the action of elastic forces, which tend to completely unfold the plane of the flexible disk.

The pitch of the angle of rotation of the flexible disk 1 is caused by the movement of the corrugator 3 (or the size of the corrugation) and the distance between the contact retainers 4 and 5. Then the cycle can be repeated.

If the flexible disk 1 is provided with a radially arranged corrugation 8 (Fig. 2, then after fixing the flexible disk 1 with the contact latch 4 and forming the corrugation 3 of the corrugation, the plane of the flexible disk 1 does not bend, as in the first embodiment, as corrugation radialio located corrugation 8, which allows you to directly use the flexible disk 1 as an indicator device, put on it the appropriate symbols.

To reduce the corrugation force and increase the speed of operation, the flexible disk 1 can be made with a hole 9 in which a jumper 10 is installed connecting the flexible disk 1 with the axis 2 of rotation (Fig. 3). The cycle of operation of the device in this case does not differ from the two previous options.

The use of the invention allows accurate small angular movements of the floppy disk. On the basis of this device, a watch with a movable dial, cycle counters with direct reading from a disk and other precise mechanisms consisting of a small number of parts with low accuracy requirements can be made.

Claims (2)

1. A device for rotating a flexible disk fixed on the axis of rotation containing a node of rotation of a flexible disk, a node for fixing it and a control unit, characterized in that, in order to increase the accuracy of small angular displacements, the turn node comprises a corrugator, on either side of which the contact locks of the fixation unit are located, which have a conical shape and are electrically connected to the corrugator through the control unit. 2. The device according to claim 1, wherein the flexible disk is provided with a radially arranged corrugation, is made with perforation, as well as with a hole in which a jumper is installed connecting it with the axis of rotation. Sources of information taken into account in the examination 1, USSR Author's Certificate No. 575689, cl. G 11 B 15/40, 1977. 2. Kozhevnikov S.N. and others. Mechanisms. Handbook, ed. 4. M., Mechanical Engineering, 1976, p. 440-452 (prototype).