EP1022804A2 - Reflektoranordung - Google Patents
Reflektoranordung Download PDFInfo
- Publication number
- EP1022804A2 EP1022804A2 EP00100799A EP00100799A EP1022804A2 EP 1022804 A2 EP1022804 A2 EP 1022804A2 EP 00100799 A EP00100799 A EP 00100799A EP 00100799 A EP00100799 A EP 00100799A EP 1022804 A2 EP1022804 A2 EP 1022804A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- reflector
- collar
- arrangement according
- hollow cylinder
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/14—Reflecting surfaces; Equivalent structures
- H01Q15/141—Apparatus or processes specially adapted for manufacturing reflecting surfaces
- H01Q15/142—Apparatus or processes specially adapted for manufacturing reflecting surfaces using insulating material for supporting the reflecting surface
Definitions
- the application relates to a reflector arrangement with a Reflector, in particular a parabolic mirror, with a Plastic layer on which a plastic film with a Structure made of metal is provided and with a housing consisting of two hollow cylinders arranged one inside the other can be between which the reflector is held.
- the parabolic mirror in the cast housing between an outer and an inner cylinder with a gasket inserted between them is also known, the parabolic mirror in the cast housing between an outer and an inner cylinder with a gasket inserted between them.
- the one circumferential inward flange has a Gasket placed against this flange, then the reflector inserted and then an inner cylinder of the reflector and the seal against the flange of the outer cylinder presses.
- the reflector arrangement according to the invention has one Reflector with a first plastic layer on which a plastic film with a metal structure is provided and a further plastic layer, which on Reflector edge a substantially hollow cylindrical Collar forms, as well as a housing that consists of two inside each other can be arranged hollow cylinders, the collar of the second plastic layer between the hollow cylinders of the Housing is held. Since the collar of the reflector on the End facing away from the reflector and not directly the edge of the Reflector is clamped between the hollow cylinders, tensions between the collar and hollow cylinders only slightly due to different thermal expansions the reflector itself.
- the hollow cylinder and the plastic layers of the Reflectors are made of different materials manufactured. These different materials exhibit also different coefficients of thermal expansion, causing a different expansion of housing and Reflector results. Because the hollow cylindrical collar is received between the hollow cylinders of the housing, must the different extent of these components to be caught. It is particularly beneficial in the collar to provide substantially axially extending slots that are distributed over the scope. Is in these slots Material cut out from the collar. Now stretch the collar and the hollow cylinder differently, so this can through the slits will be caught and tensions will be avoided.
- one of the Hollow cylinder has a shoulder behind which Latch engages and that the second hollow cylinder one Has stop for the edge of the collar. This is the Location of the collar relative to the hollow cylinders in the axial Direction defined.
- This flange serves as a seal seat for a seal between the outer hollow cylinder and the collar and Flange of the reflector is arranged. It is about advantageously a low-pressure seal, which does not exert a high force on the collar of the reflector and can absorb the different thermal expansions. Is located between the flange and the outer hollow cylinder also part of the seal. Is in this area a rib is provided on the outer hollow cylinder, which for a splash-proof attachment of the reflector on serves outer hollow cylinder.
- FIGS. 1 to 5 An exemplary embodiment will now be used with reference to FIGS. 1 to 5 the invention will be explained.
- the reflector arrangement shown in a plan.
- Figure 2 shows a corresponding section along the line A-A according to Figure 1.
- the reflector arrangement consists of a Reflector 2 and a housing 3.
- the housing 3 is used for Mounting the reflector on a plate, for example the electronic components and also a transmitter for example for radar waves.
- the reflector 2 can be, for example a parabolic mirror or a transreflector, such as those used in radar systems.
- To mount the housing it has a mounting flange 4 on with holes 5 for mounting on a plate.
- the Mounting flange 4 is formed in one piece with a outer hollow cylinder 6, with its axis perpendicular to Mounting flange 4 is oriented.
- the housing 3 has further an inner hollow cylinder 7, which is within the outer hollow cylinder 6 is located. It is special Advantage of using a cast aluminum housing.
- the reflector 2 is constructed as follows. He has one Plastic film 8, which has a structure made of aluminum wearing. The plastic film is with a first Injection molded plastic layer 9, the plastic film 8th their shape gives. This first plastic layer 9 in turn is overmolded by a second plastic layer 10. The second plastic layer 10 is not only in Area of the first plastic layer 9, that is actual reflector, but has one hollow cylindrical collar 11 on the edge of the first plastic layer and thus the actual one Connects the reflector.
- the reflector or the second plastic layer 10 also one outside the collar 11 in the radial direction extending circumferential flange 12.
- This flange 12 is over individual ribs 13 which are perpendicular to the flange 12 are arranged and distributed over the scope with which outer plastic layer 10 of the reflector connected.
- the Ribs 13 serve to stiffen and set the angle between the flange 12 and the actual reflector.
- the collar 11 of the reflector 2 has several axially Direction slots 14 on. The function of this Slots would also be guaranteed if the slots were slanted to the axial direction.
- the slots 14 are over the circumference of the collar 11 is arranged and are distributed important to have a different thermal expansion between the collar 11 and the inner and outer cylinders 6, 7 to compensate for the housing.
- the collar 11 of the reflector 2 also has several Latching fingers 15, which are distributed over the circumference.
- the Locking fingers 15 are from the other through the slots 14 Collar separated.
- the locking fingers 15 carry the collar 11 outward protruding tabs 16.
- the Latching finger 15 extends from its free end 17 extending resilient elements 18.
- the outer hollow cylinder 6 has a mounting flange 4 facing connected end 19 and a free end 20.
- the outer cylinder has a circumferential rib 21 with a shoulder oriented towards the tied end 19 22.
- Each locking arm 17 of the collar 11 has axially extending Ribs 24, which are oriented inwards.
- the assembly and construction of the reflector arrangement is now as follows. First, on the reflector 2 between the collar 11 and flange attached a low pressure seal 25. Then becomes the reflector from above, that is from the Mounting flange 4 opposite end of the housing 3 pushed the outer cylinder 6. The Locking finger 15 with the locking hook 16 over the circumferential Rib 21 deflected and locked behind shoulder 22 of the outer cylinder 6. Between the upper free end 20 of the outer cylinder 6 and the flange 12 of the Reflector, and the collar 11 of the reflector forms a cavity in which a low pressure seal is provided is. This low pressure seal 25 is located expediently already in a sealing seat of the Reflector 2 when this on the outer hollow cylinder 6th is assembled.
- the low pressure seal 25 prevents on the one hand that a seal puts direct pressure on the Exerts reflector, but on the other hand secures one Splash-proof connection between the outside Hollow cylinder 6 and flange 12.
- An additional rib 26, on the free end 20 of the outer hollow cylinder 6 is arranged, improves the sealing effect.
- the inner hollow cylinder 7 After the reflector has been placed on the outer hollow cylinder 6 is mounted, the inner hollow cylinder 7 by the Inserted on the mounting side.
- the two hollow cylinders 6 and 7, are assembled to each other such that the lower one End face 27 of the inner hollow cylinder with the Mounting surface 28 of the mounting flange 4 coincides.
- the Rastfinger 15 strike with their free end 17 against the Stop 23 of the inner hollow cylinder.
- the free ends 17 of the locking arms 15 with the elastic elements 18 now between the shoulder 22 of the outer hollow cylinder 6 and the stop 23 of the inner hollow cylinder 7 clamped.
- the resilient element 18 serve Manufacturing tolerances between the two cylinders and of course also to catch the collar of the reflector.
- the radius of the hollow cylinder and the collar changes different due to thermal expansion, so this can be compensated for due to the slots 14. While the locking fingers 15 firmly between the hollow cylinders 6, 7 are clamped, the other parts of the Collar 11 due to the slots relative to each other move.
- the reflector Due to the special design of the collar 11 of the The reflector is defined between the inner one Hollow cylinder 7 and the outer hollow cylinder 6 integrated, taking manufacturing tolerances into account and also different thermal expansion of the components been taken into account. The collar catches this different thermal expansions, without one Influence on the central position of the actual reflector exercise.
- thermal expansion is in axial direction, whereby the position of the reflector in axial direction is changed, but they have none significant impact, since the permitted tolerance in this direction is much greater than tolerance in terms of the center of the reflector.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Aerials With Secondary Devices (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
Claims (12)
- Reflektoranordnung mit einem Reflektor (2), insbesondere einem Parabolspiegel, mit einer Kunststoffschicht (9) auf der eine Kunststoffolie (8) mit einer Struktur aus Metall vorgesehen ist und mit einem Gehäuse (3) bestehend aus zwei Hohlzylindern (6,7), die ineinander angeordnet werden können, zwischen denen der Reflektor (2) gehalten ist, dadurch gekennzeichnet, dass der Reflektor (2) eine weitere Kunststoffschicht (10) aufweist, die am Reflektorrand einen im wesentlichen hohlzylindrischen Kragen (11) bildet, und dass dieser Kragen (11) zwischen den Hohlzylindern des Gehäuses (3) gehalten ist.
- Reflektoranordnung nach Anspruch 1, dadurch gekennzeichnet, dass der Kragen (11) über den Umfang verteilt mehrere Rastfinger (15) mit einer Rastnase (3) aufweist, die durch axial verlaufende Schlitze (14) vom Kragen (11) getrennt sind.
- Reflektoranordnung nach Anspruch 2, dadurch gekennzeichnet, dass einer der Hohlzylinder (6) des Gehäuses (3) eine Schulter (22) aufweist, hinter die die Rastnase (16) greift und dass der zweite Hohlzylinder (7) einen Anschlag (23) für den Rand des Kragens (11) aufweist.
- Reflektoranordnung nach Anspruch 3, dadurch gekennzeichnet, dass am Kragen (11) federnde Elemente (18) vorgesehen sind, die zwischen Schulter (22) und Anschlag (23) der Hohlzylinder (6,7) eingespannt sind.
- Reflektoranordnung nach Anspruch 1, dadurch gekennzeichnet, dass der Kragen (11) in im wesentlichen axialer Richtung verlaufende Schlitze (14) aufweist, die über dem Umfang verteilt sind.
- Reflektoranordnung nach Anspruch 1 bis 5, dadurch gekennzeichnet, dass der Kragen (11) Rippen (24) aufweist, die beim Einbringen des Kragens (11) zwischen die Hohlzylinder (6,7) des Gehäuses (3) verformt werden.
- Reflektoranordnung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass am Rand des Reflektors (2) ausserhalb des Kragens (11) ein sich in radialer Richtung erstreckende umlaufender Flansch (12) vorgesehen ist.
- Reflektoranordnung nach Anspruch 7, dadurch gekennzeichnet, dass der Flansch (12) sich gegen den äusseren Hohlzylinder (6,7) des Gehäuses (3) abstützt.
- Reflektoranordnung nach Anspruch 8, dadurch gekennzeichnet, dass zwischen Flansch (12), Kragen (11) und äusserem Hohlzylinder (6) eine Niederdruckdichtung (25) vorgesehen ist.
- Reflektoranordnung nach Anspruch 8, dadurch gekennzeichnet, dass der Flansch (12) einen Dichtungssitz aufweist.
- Verfahren zur Herstellung einer Reflektoranordnung nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass das Teil bestehend aus einer Kunststoffschicht (9) und einer Kunststoffolie (8) mit einer Struktur aus Metall mit einer weiteren Kunststoffschicht (10) überspritzt wird, aus der in einem Arbeitsgang auch der Kragen hergestellt wird.
- Verfahren nach Anspruch 11, dadurch gekennzeichnet, dass der Reflektor (2) mit einer Niederdruckdichtung (25) versehen wird, dass der Reflektor mit dem Kragen (11) in den äusseren Hohlzylinder (6) und dann der innere Hohlzylinder (7) vom entgegengesetzten Ende in den äusseren Hohlzylinder (6) eingebracht wird.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00100799A EP1022804A3 (de) | 1999-01-21 | 2000-01-17 | Reflektoranordung |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99101155 | 1999-01-21 | ||
EP99101155 | 1999-01-21 | ||
EP00100799A EP1022804A3 (de) | 1999-01-21 | 2000-01-17 | Reflektoranordung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1022804A2 true EP1022804A2 (de) | 2000-07-26 |
EP1022804A3 EP1022804A3 (de) | 2003-11-05 |
Family
ID=26070432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00100799A Withdrawn EP1022804A3 (de) | 1999-01-21 | 2000-01-17 | Reflektoranordung |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP1022804A3 (de) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4154788A (en) * | 1971-03-16 | 1979-05-15 | The United States Of America As Represented By The Secretary Of The Navy | Process for making a plastic antenna reflector |
GB2120854A (en) * | 1982-04-16 | 1983-12-07 | Fastwool Limited | Antennas |
US4937425A (en) * | 1989-08-29 | 1990-06-26 | Hughes Aircraft Company | Method of making a polarizing parabolic dish antenna reflector |
US5455589A (en) * | 1994-01-07 | 1995-10-03 | Millitech Corporation | Compact microwave and millimeter wave radar |
DE19703095C1 (de) * | 1997-01-29 | 1998-06-04 | Bosch Gmbh Robert | Gehäuse oder Gehäuseteil für eine Mikrowellen-Sende- und/oder Empfangseinrichtung, insbesondere für ein Kraftfahrzeug-Radarsystem |
US6006419A (en) * | 1998-09-01 | 1999-12-28 | Millitech Corporation | Synthetic resin transreflector and method of making same |
-
2000
- 2000-01-17 EP EP00100799A patent/EP1022804A3/de not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4154788A (en) * | 1971-03-16 | 1979-05-15 | The United States Of America As Represented By The Secretary Of The Navy | Process for making a plastic antenna reflector |
GB2120854A (en) * | 1982-04-16 | 1983-12-07 | Fastwool Limited | Antennas |
US4937425A (en) * | 1989-08-29 | 1990-06-26 | Hughes Aircraft Company | Method of making a polarizing parabolic dish antenna reflector |
US5455589A (en) * | 1994-01-07 | 1995-10-03 | Millitech Corporation | Compact microwave and millimeter wave radar |
DE19703095C1 (de) * | 1997-01-29 | 1998-06-04 | Bosch Gmbh Robert | Gehäuse oder Gehäuseteil für eine Mikrowellen-Sende- und/oder Empfangseinrichtung, insbesondere für ein Kraftfahrzeug-Radarsystem |
US6006419A (en) * | 1998-09-01 | 1999-12-28 | Millitech Corporation | Synthetic resin transreflector and method of making same |
Also Published As
Publication number | Publication date |
---|---|
EP1022804A3 (de) | 2003-11-05 |
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