SU1312640A1 - Reversible tape transport - Google Patents

Abstract

The invention can be used in the apparatus of magnetic information recording on a magnetic contribution. The purpose of the invention is to promote the functionality of the mechanism by increasing the number of ranges of transport speeds of mites. In the path of movement of the magnetic tape 2, along with Vedush, the shaft 3, transporting it in the area of low speeds, has a driving shaft 4 large speeds. The drive blocks are symmetrically located in the form of the joint cams 13 mounted on the common axes 16 and 17 and connected in pairs by springs 18 and 19 of the L-shaped levers 5, 6 and 7, 8. Both pairs of levers sv - zapa between as a drive cable 20. When transporting the tape in the required speed mode, the corresponding cam occupies the position regulated by microswitches 21, and a definite L-shaped lever introduces the tape 2 in contact with the appropriate shaft. By changing the shape of the cams, the number of microswitches, leading va, 1s and L-shaped levers, you can change the speed of transportation of the magnetic, penta. 3il. 5 (L 2} / ff 2f О5 to 05 4 Fig. 2

Description

The invention relates to instrumentation, in particular to a reversible tape mechanism, which can be used in magnetic recording devices on magnetic tape.

The purpose of the invention is to extend the functionality of the mechanism by increasing the number of speed ranges for transporting a magnetic tape.

In FIG. 1 shows a reversible tape mechanism, top view; in fig. 2 shows the position of the levers and drive shafts for the slow transport mode of the magnetic tape; in fig. 3 is a section A-A in FIG. one.

On the coils 1 there is a magnetic tape 2, which is transported by the drive shafts 3 and 4, of which the first transports the tape in the area of low speeds, and the second - large. But the other side of the tape is mounted L-shaped levers 5-8, on which the clamping rollers 9 and roller elements 10, for example of ball bearings. Roller elements mate with cam

ten

15

20

The 5th lever 5 will bring the tape into contact with the shaft 3, and the remaining levers will in this case be retracted from the magnetic tape. At the end of this mode of work, for example, there is a need for a rapid reversal of the tape. Then it comes into contact with the shaft 4, rotating at high speed, and the belt is transported in the opposite direction. In this case, lever 8 is involved in the operation. The cams, which receive the corresponding angular position according to a given program and act on the corresponding microswitches, contribute to obtaining such a mode.

By combining the shape of the cams, the number of microswitches, driving shafts and L-shaped levers, a large number of magnetic tape transport speeds can be obtained.

Claims (1)

Invention Formula A reversible tape drive mechanism containing coils for a magnetic tape is the drive shaft, springs and two blocks with the drivers 11 and 12, which play the role of 25 and the levers of the pressure rollers located on the drive lever of the pressure rollers symmetrically with respect to the lead. Each cam mechanism containing shaft, characterized in that, with the aim of there are cams 13 and 14, as well as a reducer 15. expansion of its functional possible-shaped levers in pairs of identifications due to an increase in the number of dianes of axes 16 and 17, and each pair has st-ranges of transportation speeds maggivy springs 18 and 19. Between 30 nitny tapes are inserted into it; pairs are connected by a drive cable 20. Sny in the path of the magnetic tape the second drive shaft and cable, with the drive unit made in the form of two coaxial cams and two mounted on a common axis, connected by a spring, L-shaped levers, at one end of each of which is located the roller element, on the other pressure roller, the axis D -shaped levers of both drive units are connected by a cable, and each slide mechanisms 11 and 12, while they, and 40 pairs of roller elements are matched with rather their cams, will not occupy the position, the working surface of the corresponding Regulated microswitch m.kulachka.  / Micro switches 21 are installed on the outer side of the cam mechanisms, and magnetic heads 22 and guide elements 23 are mounted on the outer side of the belt 2. The entire mechanism is mounted on the plate 24. When the magnetic tape is slowly transported in the direction indicated by arrow 25, the shaft 3 rotates. At the same time, the cu35 starts to rotate. The 5th lever 5 will bring the tape into contact with the shaft 3, and the remaining levers will in this case be retracted from the magnetic tape. At the end of this mode of work, for example, there is a need for a rapid reversal of the tape. Then it comes into contact with the shaft 4, rotating at high speed, and the belt is transported in the opposite direction. In this case, lever 8 is involved in the operation. The cams, which receive the corresponding angular position according to a given program and act on the corresponding microswitches, contribute to obtaining such a mode. By combining the shape of the cams, the number of microswitches, driving shafts and L-shaped levers, a large number of magnetic tape transport speeds can be obtained. Invention Formula 35 23 FIG. H