DD301468A7 - ECKLOESUNG OF THE SEALING BETWEEN A HOUSING AND A DOOR AGAINST HIGH FREQUENCY ELECTROMAGNETIC WAVES - Google Patents

Abstract

The invention relates to a corner solution for the sealing between a housing and a door against high-frequency electromagnetic waves. The invention has the aim of providing a corner solution of the door seal for electromagnetically shielded cabins or rooms, which allows attenuation of electromagnetic pulses in the Hz and GHz wave range. According to the invention, a corner solution for space shielding is provided by the special arrangement and design of the corner joint of a door seal consisting of an elastic metal strip arranged around a polymeric core, which enables effective damping of electromagnetic pulses in the Hz and GHz wave ranges , According to the invention the object is achieved in that the ends of the door seal made of polymeric core and elastic metal sheath mitred at a certain angle and are arranged without positive connection at the corner of the door on impact and this corner joint is formed with a certain offset. The electromagnetic waves are effectively shielded during their propagation at the corner joint according to the invention by the achieved chimney effect between the abutting ends of the door sealing strips. The invention is explained in more detail in a drawing with two figures. Fig. 1 and 2 {sealing; Space shield; Damping; High frequency technology; Pulse; Waveband; Metal strip; Contact pressure; Contact surfaces; Corner; Casing; Door}

Description

embodiment

The invention will be explained in more detail using an exemplary embodiment. In the drawing show

Fig. 1: a view of the present invention formed corner joint

Fig. 2: the schematic representation of an equivalent circuit diagram, at which the operating principle of the inventive corner solution of an electromagnetic door seal is to be explained.

The illustration of the door seal in Fig. 1 refers to the information in the deposited patent with the patent number GP H 05 K / 304140-3.

The invention is based on the idea that the mitred ends of Türabdichtstreifen that are formed without frictional connection with a certain offset as a corner joint, a durable functional seal against high-frequency electromagnetic waves in the corner of the door seal represent the preparation of this corner solution without great constructive and technological expenditures is feasible. The shielding effect against high-frequency electromagnetic waves is not based in this corner solution on the direct metallic contact whose permanent functioning would be questioned in a non-positive connection by soldering or welding.

A non-positive connection of the ends of Türabdichtstreifen in the corner region would significantly reduce the elasticity of the door seal, so that it comes with frequent use by deformation or breakage of frictional connection to functional impairment and an undefined residual gap between the parallel surfaces of the door joint or the ends of Türabdichtstreifsn arises ,

The electromagnetic shielding effect of the corner joint formed according to the invention is based on the chimney effect between the abutting ends of the door sealing strips. In particular, in the area (22) of the corner joint creates a chimney or waveguide whose length is at least three times greater than its inside width. (Z2) of Fig. 2 is intended to characterize the high-impedance that causes such a chimney or waveguide in the propagation of electromagnetic waves. (Z1) and (Z3) are the low-resistance impedances that form in the area of the corner joint due to the remaining chimney effect. (Z4) characterizes the remaining radiation impedance of the radiation source in the equivalent circuit diagram. The electromagnetic waves are effectively shielded in the area (Z2) by the chimney effect achieved and derived in the areas (Z 1) and (Z3) with low impedance to ground.

Claims (3)

A corner solution of sealing between a housing and a door against high-frequency electromagnetic waves, in which the seal consists of a deformable core of a polymeric material, such as rubber, and a resilient metal strip disposed about said core, characterized in that the ends of the seal made of polymeric core (4) and elastic metal sheath (3) separated at a certain angle miter and without frictional connection at the corner of the door (1) on impact, for example by means of a fastening strip (2), and this corner joint (5) with a certain offset (a) is formed. 2. Arrangement according to claim 1, characterized in that the angle of the miter is at least 30 ° and at most 60 °. 3. Arrangement according to claim 1, characterized in that the offset (a) of the corner joint (5) in the closed (1) is at least 3 mm and at most one third of the length of the miter cut (Fig. 1). For this 1 page drawings Application of the invention The invention relates to the corner solution of a seal between the housing and the door for an electromagnetically shielded cabin or an electromagnetically shielded room. Shielded enclosures, cabins and rooms are used for telecommunications transmission and reception equipment, data processing equipment, control and measuring equipment, as well as equipment used for military purposes. Such systems and devices are susceptible to interference from electromagnetic pulses. An effective space shield against such electromagnetic pulses calls for a high attenuation in the Hz and GHz wave range in order to keep the environment of the equipment and devices disturbing field. Characteristic of the known technical solutions In electromagnetically shielded cabins and rooms, the door joints are inhomogeneities, which are known to adversely affect the attenuation of electromagnetic frequencies. These inhomogeneities are caused, inter alia, by defects in the contact springs and poor contact in the door joint area. A focal point is the structural design of the corner solution in the door joint area. In the present patent specifications, door seals are described which are characterized by specially designed shielding profiles (DE 2522186 C2, DE 221 904 AD, the wounding of special metal bands (DE 2608921 AD or the use of metal braids (DE 2328951 B2), such shielding profiles, metal bands or metal braids usually very rigid and not dimensionally stable, so that frequent use of deformation leads to functional impairments and a residual gap arises between parallel surfaces of the door joint Other patents include entire housing arrangements, including the door joint sealing (eg DE 3204274A1, DT 2134815 B2, DE 2601 277 A1 ), in which in particular perpendicular to the frame double-contact or Z-springs are used, between which engages an angled edge of the door leaf.Double contacts with a small suspension travel are completely exposed to the effects of unavoidable in massive doors tolerances and gewä Over time no longer make perfect contact. For all mentioned patents it should be noted that a special representation or description of the corner solution for the door seal is not given. Object of the invention The aim of the invention is to provide a corner solution of the door lock for electromagnetically shielded cabins or rooms, which allows improved damping of electromagnetic pulses in the Hz or GHz wave range. The sealing of the door with a mechanical locking device should remain reliable over a long period of time and be produced using suitable materials without major structural and technological difficulties. Explanation of the essence of the invention The invention is based on the object by the special arrangement and design of the corner joint of a door seal, which consists of a resilient metal strip disposed around a polymeric core, to provide a corner solution for space shield, the effective damping of electromagnetic pulses in the Hz and GHz Wave range allows. According to the invention the object is achieved in that the ends of the seal made of polymeric core and elastic metal sheath mitred at a certain angle and are arranged without kraftschiüssige connection at the corner of the door on impact and this corner joint is formed with a certain offset. The electromagnetic waves are effectively shielded during their propagation at the corner joint according to the invention by the achieved chimney effect between the abutting ends of the door sealing strips.