RU2338344C1 - Protective jacket for radio-electronic devices - Google Patents

Abstract

FIELD: radio electronics.

SUBSTANCE: protective jacket made of polymer material, internal cavity of which follows the shape of protected radio-electronic device, for instance, radio-electronic circuit board, and on its internal side there are reinforcing ribs, and top part of jacket is made convex.

EFFECT: increase of protective properties of radio-electronic items against external mechanical effects, and also protection against environmental impact.

4 cl, 6 dwg

Description

The invention relates to the field of radio electronics, in particular, it can be used as a product that protects radio electronic transponders of an automatic identification system located on the outside of land vehicles from external mechanical influences and chemically aggressive environments, ensuring radio transparency requirements.

Known protective casing [RF patent for utility model No. 42149], containing a base and a cover in the form of a monolithic structure of a translucent polymer material that is resistant to chemically active agents.

The disadvantage of this technical solution is the lack of strength of the housing.

Known protective casing for an electronic board [RF patent No. 2132788], consisting of a base and a cover, forming an internal cavity to accommodate the board. The cover is fixed to the base with a threaded element with a tear-off head.

The disadvantage of this technical solution is the lack of strength of the housing.

Known casing [RF patent No. 2215347], consisting of one flat and side walls made with the formation of the internal cavity and the side walls are made with edge bending for fixing the casing on the base.

The disadvantage of this technical solution is the lack of strength of the housing.

Known casing [RF patent No. 2209326], consisting of a polymeric material and containing stiffeners and supports for mounting.

The disadvantage of this technical solution is the lack of strength of the housing.

The closest invention is a casing [RF patent No. 21449414] containing a flat box-shaped case with stiffeners, at the ends of which there is a L-shaped protrusion around the perimeter, which serves to fasten the cover.

The disadvantage of this technical solution is the lack of strength of the housing.

The aim of the invention is to increase the protective properties of the casing.

The goal is achieved due to the fact that the protective casing is made of a polymeric material, the internal cavity of which follows the shape of the protected electronic device, for example, an electronic circuit board, and there are stiffening ribs on the inside, the upper part is convex.

The technical result, the achievement of which the claimed product is directed, is to increase the protective properties of electronic devices from external mechanical influences, as well as protection against environmental influences.

Figure 1 shows the General appearance of the protective casing.

Figure 2 shows a view of the casing from the bottom.

Figure 3 shows a top view of the casing.

Figure 4 shows from the end in section a protective casing with the installed device 4 of the automatic identification system based on 6.

Figure 5 shows (side view) in the context of a protective casing with the installed device 4 of the automatic identification system on the basis of 6.

In Fig.6. shows the option of attaching a protective casing using the bracket 11.

The protective casing is a flat box-shaped case with stiffening ribs (Fig. 1 and Fig. 2), at the ends of which there is a L-shaped protrusion 10 around the perimeter, intended for fastening the casing to the surface. The protective casing itself is made of a translucent polymer thermoplastic material that is resistant to mechanical and climatic effects, as well as to chemically aggressive environments. The stiffening ribs 2 are located on the inside of the case so that there is a gap 5 between them and the upper surface of the protected electronic device 4, and the upper surface of the body is convex and there are holes on the L-shaped protrusion 10 for fixing to the base on which the protected electronic device is fixed .

On the casing, in this solution, there are six holes 1 for attaching the casing to the base, stiffeners 2, two channels 3 for draining the condensate and precipitation from the inner cavity of the casing.

The label, in this embodiment in the form of the inscription “Top”, shows the installation position of the casing so that the channels 3 are at the bottom.

Figure 2 shows an example of the implementation of the ribs 2 stiffness in the form of a grid with a certain step. In Fig. 4 and in Fig. 5, the stiffening ribs 2 are located along the casing.

The electronic device 4 can be attached to the base 6 by a mount 7. The protective casing is attached to the base 6 by a mount 8.

The upper surface 9 of the protective casing is made in the form of a convex surface.

The internal cavity formed by the upper part of the casing, the side walls and the base, which can be the side surfaces of the vehicle, repeats the shape of the protected electronic device 4, but is made larger. The size of the gap 5 between the upper surface of the lid and the inner surface of the electronic device 4 reaches several millimeters.

To reduce the deflection of the upper part of the casing upon impact, the upper part of the casing is made in the form of an arch. The convex upper surface gives an additional result in the form of a point impact, for example, with a crowbar in a direction different from the perpendicular, impact on the tangent.

A protective casing is installed on top of the electronic device 4, located on the metal surface of the railway carriage, locomotive or side of any vehicle (the mounting of the electronic device is not shown in the figure), and is attached to the same metal base. As fasteners 7 and 8, for example, blind rivets or threaded elements with a tear-off head can be used.

To increase the tightness of the casing can be installed on the base 6 through the gasket, in particular, rubber or polymer.

To increase the strength of the casing can be pressed with a clamping metal bracket 11. Figure 6 shows a variant of the protective casing with eight holes for mounting and a clamping metal bracket 11.

Under mechanical loads, the casing works as a shock absorbing agent. When attempting a mechanical impact in the form of pressure or impact of a hard object on the protective casing, the casing perceives the load. Due to the elasticity of the polymer used, the upper part of the protective casing bends, but due to the gap does not transmit the impact force to the electronic device, as a result of which the device 4 itself is protected from failure due to destruction.

The pitch, type and dimensions of the stiffeners, the gap between the inner surface of the casing and the outer surface of the sensor, the dimensions of the "arch", the number of holes for attaching the casing are calculated based on technical requirements for the strength of the mechanical impact. According to the simulation results, for the mechanical loads required by the technical requirements, the gap is of the order of 4.5 ... 5.0 mm.

Structurally, the protective casing can have a wall thickness of the order of 4 mm, stiffeners are available on the inside, the thickness of the ribs is 1 ... 3 mm, the height is 1 ... 4 mm in the central part, the step size of the ribs is selected from the interval 5 ... 15 mm, based on design considerations and calculating the consumption rate of the material, the outer and inner faces can be rounded, the radii are selected from the interval of 3 ... 20 mm, depending on the intersection of which planes a face is formed, which improves the casting process of the part, its strength and gives an improved external view, stiffeners can also have fillets (0.5 ... 1 mm) when switching to the inner plane of the casing, which improves the casting process during manufacture. The maximum height of the arch with respect to the edges can reach 2 ... 8 mm.

The casing can be made of any thermoplastic polymer material that meets the requirements for radio transparency and resistance to mechanical and climatic effects, as well as to the effects of chemically aggressive environments.

As a material, for example, Armamide, Zaitel, Krastin, Heitrel or any other polymers with high elasticity, resistance to repeated alternating loads, high impact resistance with a notch, high oil-gas resistance, including at elevated temperatures, can be used. high notch resistance.

The protective casing can be manufactured by injection molding on injection molding machines.

The claimed technical solution meets the patentability criterion of "industrial applicability", since its implementation can be carried out using known means and methods.

Claims (4)

1. A protective casing for electronic devices, comprising a box-shaped case with stiffening ribs, at the ends of which there is a L-shaped protrusion along the perimeter, intended for fastening the casing, characterized in that the casing is made of a translucent polymer thermoplastic material that is resistant to mechanical and climatic effects, as well as to the effects of chemically aggressive environments, while the stiffeners are located on the inside of the case so that between them and the upper surface of the protected electronic stroystva a gap, and the upper surface of the housing is convex and T-shaped protrusions have holes for fixing to the base, on which an avionics device to be protected. 2. The protective casing according to claim 1, characterized in that when attaching the protective casing to the base, a gasket is installed between them. 3. The protective casing according to claim 1, characterized in that when attaching the protective casing to the base, a clamping metal bracket is mounted on the protective casing. 4. The protective casing according to claim 1, characterized in that the casing is attached to the base with a threaded element with a tear-off head or an exhaust rivet.

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