SU1270792A1 - Device for shielding manetic heads - Google Patents

Abstract

1. A DEVICE FOR SCREENING MAGNETIC HEADS, containing a screen fixedly mounted on the base, and a curtain of magnetically soft material, installed through an elastic holder on the swivel lever of the pressure roller, so as to increase the service area of the head, a hinge and a spring are inserted into it, the shutter is made in the form of an unequal arm connected through a hinge to the side of the holder, which is coupled through the spring facing the base of the device with the short end of the unequal arm yeah. 2. The device according to Claim 1, which means that, in order to improve the installation accuracy of the shutter, longitudinal grooves are made in the side of the holder, and perpendicular perforations in the pressure roller lever (L adjusting holes.

Description

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About CO Is9

This invention relates to a magnetic recording t-frame, which is useful for shielding of heads.

It is known a device containing a screen and a curtain of stiffened soft material j which is mounted on a spring-loaded column and embedded in a crypt} on which a magnetic head is mounted in the screen.

A disadvantage of the known device is the complexity of the connection of the node moving the B1: c.

The closest to the pitch is the mustache; the broach; 1 ;; the holding screen, still STYLO-lent on the basis of; and a curtain of magnetite gxg; and: -1tterkala ,, installed through an elastic holder on the swivel arm of the prilimik roller.

This device is structurally simpler, but it does not provide sufficient free access to the working surface of the magnetic head during operation, for example, when filling up the magnetic tape, cleaning the head clearances or visual: controlling the quality of the head alignment using various devices.

The purpose of the inventions is to increase the service area of the head. connected through a hinge; with the side of the brakes, which is matted through the spring facing the device by the short end of an unequal arm.

In addition, for installing TO-JHOCI, the curtain installation in the side of the holder is made 1: 1E longitudinal grooves, and in the firing roller lever there are perpendiculars to the opening of the curtain roller.

Fig. 1 shows the device, general view; figure 2 - tape mechanism., top view; on frgg. Z - view A in FIG. 1,

The device contains a shutter i of a magnet magni magnet, ala5 located in front of the working surface 2 of the magnet-unit head Zz lever 4 of the roller 5 and an elastic holder b connecting the shutter with the lever 4. The holder 6 is of P-shaped. The side 7 of the holder 6 is fixed on the lever 4 "At the bottom (figure 1)

parts of the other side 8 of the holder 6 are fitted with a hinge 9 with a curtain 1. The latter at the connection point with the hinge forms a double-arm 9 lever. Short shoulder 10 last

located at the base 1 1 of the magnetic head 3; A flat spring I2 is also fixed on the holder 6 and is associated with the short arm 10 of the curtain 1. The large arm 13 of the curtain 1 rests

o the upper part of the side 8 of the holder 6 and forms an angle of 14 with the working surface 2 of the head 3.

The elastic holder b has, at the junction with the presser lever 4

roller 5 longitudinal grooves 15, made on the side 7 of the derlshtel 6, and the lever 4.- oval adjustment holes 16 located perpendicular to the grooves 5, which gives

the ability to adjust with screws 17 the position of the shutter 1 relative to the working surface 2 of the magnetic head 3 in two directions. The magnetic head 3 with the screen 18 is mounted on the board 9 of the block of magnetic heads. The latter, using racks, is mounted on the chassis 20 of the tape recorder, on which the drive shaft 21 and the axis 22 of the lever 4 of the presser are also mounted.

roller 5.

The device works as follows.

With the inclusion of the working mode of the tape recorder under the action of

an electromagnet (not shown) lever 4, turning around axis 22, presses the roller 5 (not shown) on the drive roller 2 to the drive 2, carrying it out. Shutter 1 when

this rotates with the lever 4, approaching the screen 18 of the head 3, and with the support 10 rests against the edge of the screen 18 at the base II of the magnetic head 3, turning around the axis of the hinge 9 and overcoming the force of the spring 12, closes the window of the screen 18. When retracting the lever 4 from the drive shaft 21, the holder 6 with the shutter 1 moves away from the screen 18, opening

access to the working surface 2 of the head 3. In this case, under the influence of the spring 2, the shutter takes up its original position, i.e. set under

angle 14 to the working surface 2 head 3, leaning with a large shoulder 13 on the upper part of the side 8 of the holder 6.

The invention will significantly simplify the process of adjusting the head unit by increasing the area around 1279 724.

serving the working surface of the magnetic head without increasing the angle of rotation of the pressure roller arm. This, in turn, will allow to use the electromagnets of the drive of the pressure roller lever of smaller dimensions and power consumption.

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Claims (2)

1. A device for shielding magnetic heads, comprising a screen fixedly mounted on the base and a soft magnetic curtain mounted through an elastic holder on the pivot arm of the pressure roller, characterized in that, in order to increase the head service area, a hinge and a spring are inserted into it , the shutter is made in the form of an unequal lever connected through a hinge to the side of the holder, which is interfaced through a spring with the short end of the unequal lever facing the base of the device. 2. The device according to claim 1, wherein the, in order to increase the accuracy of the curtain installation, longitudinal grooves are made in the side of the holder, and adjustment holes perpendicular to them in the pressure roller lever. ..SU 1270792