LT5647B - Telescopic antenna - Google Patents

Abstract

The invention is related to navigation field, for link between flying objects and on earth being operator and for the position correction of the object in the space. This telescopic antenna consists of corps (1) with a gear, telescoping-extruding mechanism and antenna composed of n concentric narrowing diameter tubes (2) with retainers on the ends (3). The telescoping- extruding mechanism comprise cylindrical form reel (4) with ends clamped by disks (5), on it by one side is fixed and rolled profiled metal strip (6), its other end is fixed to the antennas least diameter tube (2). The gear is piezoelectrical and compose of piezoelement (8) fixed in the holder (7), with electrodes connected to electrodic exciter, which through friction resistant element (9), is grinded into circular surfaces of one of real disks (5) and through springs (10) to the holders (7) horizontal stock fixed in the corps (1). Profiled strip (6) is convex to the rolling side and its form matches concentric narrowing diameter t

Description

The invention relates to the field of navigation devices for automatic communication between flying objects and the ground operator and for position correction of the object in space.

There is known a telescopic antenna consisting of a housing containing an electric motor, a worm gear reducer, a push-and-drop mechanism controlling an antenna consisting of a flexible cable and interconnecting hollow tubes of different cross-sections (see U.S. Patent No. 5,189,435, H01). Q 1/10, 1993).

There is a known telescopic antenna consisting of hollow concentric tubes with threads on the outer surface, which are mounted asymmetrically on a threaded rod (see U.S. Patent No. 7225694, F16 B 1/01, 2000).

There is known a telescopic antenna with an electromechanical actuator consisting of a housing incorporating a worm-screw helical gear which transmits motion to a gear coupled to a displacement-displacement mechanism consisting of three pinion drums of different diameters, a damping drum and a toothed drum, an annular spring mounted on a damping drum, having a flexible rack mounted on a toothed drum connected to the smallest diameter tube of an antenna consisting of n decreasing cross-sections with locking ends at each end (U.S. Patent No. 4,864,322, H 01 Q 1 / 10,1989). .

The disadvantage of the invention is that the telescopic antenna has a very complex push-and-pull mechanism, which requires a worm gear reducer and an electric motor, which are quite complex, bulky and weight consuming, to control the rack.

The object of the present invention is to simplify the construction by reducing the dimensions, weight and energy consumption.

The object of the invention is achieved by the fact that in the telescopic antenna consisting of the actuator housing, the push-eject mechanism and the antenna consisting of n concentric tubes of decreasing cross-section with latches at the ends, the ejection mechanism consists of a cylindrical drum with , one end, fixed and twisted metal profiled strip, the other end of which is fixed to the antenna's smallest cross-sectional tube, and the actuator is piezoelectric, consisting of a piezo-element mounted in a holder with electrodes connected to one of the abrasion-resistant elements the circumferential surface of the drum discs and through the springs to the horizontal base of the bracket fixed in the housing. In addition, the profiled strip is convex to the inside of the coil and has a shape corresponding to the inside dimensions of the concentric tubes of decreasing cross-section, whereas the cross-section of the drum discs depends on the length of the profiled strip and the number of concentric, decreasing cross-sections.

BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention is illustrated in the figure: a - a general view of a telescopic antenna outstretched, b - a general view of a telescopic antenna outstretched;

The telescopic antenna consists of a housing 1 in which the actuator is mounted, a push-out mechanism and an antenna consisting of n concentric tubes of decreasing cross-section 2 with latches 3 at the ends. The push-and-drop mechanism consists of a cylindrical drum 4, bounded at one end by discs 5, with a metal profiled strip 6 secured and twisted at one end, the other end of which is mounted on the antenna's smallest cross-sectional tube 2 and actuated by a piezoelectric element. 8 with electrodes connected to an electronic excitation unit (not shown), which, through a friction-resistant member 9, is supported on a circular surface of one of the drum discs 5 and, through springs 10, on a horizontal base of the holder 7.

The telescopic antenna works as follows.

An electrical resonance frequency signal is applied to the piezoelectric electrode 8 from the electronic excitation unit (not shown), which causes directional mechanical deformation of the piezoelectric element 8. The mechanical deformations in the contact zone, through the abrasion-resistant member 9, give the disk 5, and thus the drum 4, a directional rotational movement. By rotating, the cylindrical drum 4 pushes the metal profiled convex strip 6 on its inner side 6. Moving in a directional direction, the metal profiled strip 6 pushes the antenna smallest diameter tube 2 attached to its end which, when fully extended, engages the latches 3. Pipe clamps 3 limited by the displacement positions of the cylindrical tubes. Next, the following tubes 2, which are supported on the ribs 6 of the profiled metal convex to the inner side, are pushed out. The edges of the profiled strip 6 rest on the lower circumferential portion of each cylindrical tube 2, thereby displacing each cylindrical tube 2 in the direction of movement of the profiled strip 6. The convexity of the ribbon 6 inwardly increases the stiffness of the ribbon for tripping, and thus the stability of the entire antenna in space. Applying an electrical signal to the opposite electrodes of the piezoelectric 8 produces an opposite movement which gives the cylindrical drum 4 a reversal. By rotating in the opposite direction, the cylindrical drum 4 turns the profiled, convex metal strip 6 into its original position, while pulling the end-mounted tube 2 of the smallest cross-section which collapses the subsequent tubes 2 to their original position.

Compared to the prototype, a new set of structural elements, using a twisted metal, profiled, convex ribbon and piezo actuator, simplifies the design of the push-to-slide mechanism, reducing its dimensions and weight, and reducing energy consumption.

Claims (3)

Definition of the Invention 1. A telescopic antenna consisting of an actuator housing, a push-out ejection mechanism and an antenna consisting of n concentric tubes of decreasing cross-section with latches at its ends, characterized in that the ejection-ejection mechanism consists of a cylindrical drum with a single disk at its ends, end-mounted and twisted metal profiled strip, the other end of which is attached to the antenna's smallest cross-sectional tube, the actuator being piezo-electric, consisting of a piezo-element mounted on a holder with electrodes connected to an electronic excitation block the circular surface of the discs and through the springs to the horizontal base of the bracket fixed in the housing. Telescopic antenna according to claim 1, characterized in that the profiled strip is convex to the inner coil side and its shape is stepped and corresponds to the internal dimensions of concentric tubes of decreasing cross-section. Telescopic antenna according to Claim 1, characterized in that the cross-section of the drum-limiting discs depends on the length of the profiled strip and the number of concentric, decreasing cross-sectional tubes.