EP0085786B1 - Antenne télescopique et dispositif pour l'actionner - Google Patents

Antenne télescopique et dispositif pour l'actionner Download PDF

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Publication number
EP0085786B1
EP0085786B1 EP82111954A EP82111954A EP0085786B1 EP 0085786 B1 EP0085786 B1 EP 0085786B1 EP 82111954 A EP82111954 A EP 82111954A EP 82111954 A EP82111954 A EP 82111954A EP 0085786 B1 EP0085786 B1 EP 0085786B1
Authority
EP
European Patent Office
Prior art keywords
flexible rod
telescopic antenna
antenna according
centre line
longitudinal centre
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.)
Expired
Application number
EP82111954A
Other languages
German (de)
English (en)
Other versions
EP0085786A1 (fr
Inventor
Richard Langheck
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wilhelm Sihn jr KG
Original Assignee
Wilhelm Sihn jr KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wilhelm Sihn jr KG filed Critical Wilhelm Sihn jr KG
Publication of EP0085786A1 publication Critical patent/EP0085786A1/fr
Application granted granted Critical
Publication of EP0085786B1 publication Critical patent/EP0085786B1/fr
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/08—Means for collapsing antennas or parts thereof
    • H01Q1/10—Telescopic elements
    • H01Q1/103—Latching means; ensuring extension or retraction thereof

Definitions

  • the starting point of the invention is a telescopic antenna with the features specified in the preamble of claim 1.
  • a telescopic antenna is known from DE-PS-881 965.
  • the known telescopic antenna has a flat steel band for extending and retracting inside, which has holes along its entire length, into which teeth of a driven gearwheel engage.
  • DE-PS-881 965 alternatively also mentions as an organ for pushing in and pushing out a helical spring running in the telescope interior, which is moved forwards or backwards by a driven nut engaging with its threads in the threads of the helical spring, and unspecified , generally referred to as sliding tongue organs, which can be made of plastic or other material in addition to steel and which are inevitably intermeshed with a drive wheel or in a frictional engagement.
  • the requirements for driving telescopic antennas for motor vehicles are essentially determined by the fact that thrust forces of up to approximately 100 N have to be applied and transmitted.
  • the drive known from DE-PS-881 965 does not reliably meet this requirement.
  • the perforated steel band inside the telescope namely in the outer telescopic tubes with the larger clear width, can kink;
  • the steel band in the outer telescopic tubes has more and more scope for kinking as the extension length increases.
  • Another problem is that metallic organs for inserting and removing a telescopic antenna change their electrical capacitance, which is why they have not been used in practice.
  • the invention has for its object to improve the operational safety of a telescopic antenna according to the preamble of claim 1, in particular to enable the actuating device to run with as little friction as possible and to prevent the extending member from kinking.
  • the selected shape and arrangement of the end faces of the slots, which cooperate with the tooth flanks of the teeth of the gearwheel, ensure that the teeth transmit the thrust force to the wire only in the region of the longitudinal center line, that is to say along its neutral fiber, so that its tendency to kink as a result is only minor.
  • a design of the tooth flanks is facilitated in such a way that during the entire rolling movement of a tooth on one end face of a slot, the tooth faces transferred thrust i. w. is only transmitted in the direction of the longitudinal center line of the wire.
  • the gearwheel tries to deflect the wire laterally with only a minimal force, and the wire is therefore only pressed with minimal force against an abutment opposite the end face of the gearwheel;
  • the abutment is needed in the actuator to hold the wire in engagement with the gear;
  • the abutment can be a flat wall piece opposite the tangent parallel wall or a concave wall piece partially enclosing the gear wheel;
  • the abutment is preferably a cylindrical wall which surrounds the gearwheel eccentrically and advantageously can be freely rotated about its axis. The newly shaped wire can move through the gap between the gear and the abutment with minimal friction.
  • the favorable effect of the shape of the slots is supplemented by a favorable cross-sectional shape of the wire.
  • the wire cross-section is limited by the clear width of the innermost, narrowest telescopic tube and should use the available clear width as fully as possible to achieve the greatest possible bending stiffness. Therefore, a wire with a round cross section or a cross section approximating the round cross section, e.g. B. with hexagonal or octagonal cross-section, which should consist of a plastic for reasons of ease of manufacture and lubricity.
  • a wire behaves particularly favorably in terms of manufacturability and function, in which the end faces of the slots are designed in the form of a circular arc, claims 3 to 7 specifying the most favorable dimensions for the wire.
  • the material for the wire is extruded polyformaldehyde, which is notch-sensitive and susceptible to breakage, but has a strength that is favorable for pushing out and a texture that runs in the longitudinal direction.
  • the slots are best milled into such a wire, the wire being passed step by step between the wire on both sides of the milling tool acting on it.
  • the height of the teeth of the gear that meshes with the wire should be greater than half the diameter of the wire so that the tooth flanks can reach the neutral fiber of the wire.
  • the height of the teeth, as far as they can dip into the slots, should however not be greater than the full diameter of the wire, so that the tooth heads do not come out of the Slits protrude, but the wire is allowed to abut its abutment, so that the wire is held and guided between the gear and the abutment.
  • FIG. 1 shows a telescopic antenna 1 with an actuating device 2.
  • a telescopic antenna 1 itself, only an inner telescopic tube 3 with an antenna head 4 and an outer telescopic tube 6 guided in a sleeve 5 are drawn.
  • the actuating device 2 only the parts essential for understanding the invention are shown, namely a cylindrical housing 7 with a tangential outlet opening 8 for a slotted plastic wire 9 of circular cross-section, the front end of which is fastened in the inner telescopic tube 3 and which is driven by an eccentric drive arranged in the housing 7 gear 10 can be pushed out of the housing 7 and brought back.
  • the longitudinal center line 13 of the wire 9 also runs through the longitudinal center planes of the slots 12.
  • each slot 12 is i. w. limited by cylindrical surfaces, which are generated by arcs 15 and 15 'with the radius R, the centers M and M' of which are at a distance D ⁇ R on both sides of the longitudinal center line 13, so that the arcs 15, 15 'or those generated by them Cylinder surfaces intersect in the plane containing the longitudinal center line 13 and running at right angles to the longitudinal center plane of the slots 12; in this plane, the slits 12 have their smallest length L in order to widen from there in the form of an arc to the wire surface.
  • the selected shape of the end faces 14a, 14b of the slots 12 on the one hand creates space for an unobstructed entry and exit of the teeth 16 of the gear 10 and enables the tooth flanks 17, the end faces 14a and 14b practically only in the area of the cutting edge 18 of the Touch end faces 14a, 14b delimiting cylinder surfaces.
  • the shear force is therefore transmitted to the gearwheel 10 practically only along the neutral fiber of the wire 12, the restricting word “being used practically because the cutting edge 18 will naturally wear out through use and will thereby round or widen.
  • the shape of the tooth flank and the radius of the gear wheel 10 are matched to the shape and arrangement of the slots 12 in the wire 9 in such a way that the transmission of the thrust i. During the entire rolling movement of the tooth flanks 17 onto the cutting edges 18. w. in the direction of the course of the neutral fiber of the wire 9.
  • the tendency of the wire 9 to kink can be kept extremely small by these measures according to the invention.
  • the wire 9 is held and guided in the housing 7 in a working gap located near the outlet opening 8 between the gear wheel 10 and the inner wall of the housing 7, which is flat in the area of the working gap with a tangential direction leading into the outlet opening 8.
  • the height h of the teeth 16 is slightly smaller than the diameter d of the wire 9, so that in the selected arrangement in the working gap with the wire 9 lying on the one hand against the inner wall of the housing 7 and on the other hand reaching to the root circle 19, the teeth 16 just do not yet enclose the inner wall of the housing touch.
  • the cylindrical housing 7 can be arranged rotatably about its axis.

Landscapes

  • Details Of Aerials (AREA)
  • Aerials With Secondary Devices (AREA)

Claims (10)

1. Antenne télescopique avec dispositif d'actionnement pour véhicules automobiles, ren- trable et déployable à l'aide d'un organe flexible allongé, se déplaçant à l'intérieur du télescope, lequel est, dans le sens longitudinal, doté de trous disposés les uns derrière les autres et régulièrement espacés, dans lesquels s'engagent les dents d'une roue dentée entraînée, caractérisée par le fait que l'organe flexible est un fil rond ou approximativement rond (9) en matière plastique dont les trous (12) sont des fentes qui traversent le fil (9) sur un plan contenant la ligne médiane longitudinale (13) du fil allongé (9) et dont le diamètre intérieur, mesuré dans le sens parallèle à la ligne médiane longitudinale (13) du fil (9) présente sa valeur la plus réduite (L), celle-ci augmentant de la ligne médiane longitudinale (13) vers la surface du fil.
2. Antenne télescopique d'après la revendication 1, caractérisée par le fait que les fentes (12) sont, sur le plan médian des fentes (12), contenant la ligne médiane longitudinale (13) du fil (9), et sur les plans parallèles à celui-ci et se trouvant dans la largeur des fentes, respectivement limitées par deux arcs de cercle (15, 15') se coupant sur la ligne médiane longitudinale (13), dont les points centraux (M, M') se trouvent sur ces plans de part et d'autre de la ligne médiane longitudinale (13) à une distance (D) de celle-ci qui est inférieure au rayon (R) de l'arc de cercle y afférent (15, 15').
3. Antenne télescopique d'après la revendication 1 ou 2, caractérisée par le fait que les rayons (R) des deux arcs de cercles (15, 15') concordent ainsi que les écarts (D) de leurs points centraux (M, M') de la ligne médiane longitudinale (13).
4. Antenne télescopique d'après l'une des revendications précédentes, caractérisée par le fait que le rapport entre le rayon de l'arc de cercle (R) et l'écart (D) du point central d'arc de cercle (M, M') de la ligne médiane longitudinale (13) se situe entre 1,1 : 1 et 1,3 : 1, de préférence à 1,14 : 1.
5. Antenne télescopique d'après l'une des revendications précédentes, caractérisée par le fait que la largeur des fentes (12) est comprise entre 20 % et 40 %, environ 25 % de préférence, du diamètre (d) du fil en matière plastique (9).
6. Antenne télescopique d'après l'une des revendications précédentes, caractérisée par le fait que le rayon (R) de l'arc de cercle (15, 15') est de 1,0 à 1,5 fois, de préférence environ 1,15-1,20 fois, le diamètre (d) du fil en matière plastique (9).
7. Antenne télescopique d'après l'une des revendications précédentes, caractérisé par le fait que l'écart (a) entre les fentes successives (12), mesuré le long de la surface du fil (9), est au minimum de 1 mm, de préférence d'environ 1,5 mm.
8. Antenne télescopique d'après l'une des revendications précédentes, caractérisée par le fait que le fil (9) est réalisé en polyformaldéhyde.
9. Antenne télescopique d'après l'une des revendications précédentes, caractérisée par le fait que les fentes (12) sont fraisées dans le fil (9).
10. Antenne télescopique d'après l'une des revendications précédentes, caractérisée par le fait que la hauteur (h) des dents (16) de la roue dentée (10) est supérieure à la moitié du diamètre (d) du fil (9) et au maximum équivalente au diamètre complet (d) du fil (9).
EP82111954A 1982-01-09 1982-12-23 Antenne télescopique et dispositif pour l'actionner Expired EP0085786B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3200444 1982-01-09
DE19823200444 DE3200444A1 (de) 1982-01-09 1982-01-09 Teleskopantenne mit betaetigungseinrichtung

Publications (2)

Publication Number Publication Date
EP0085786A1 EP0085786A1 (fr) 1983-08-17
EP0085786B1 true EP0085786B1 (fr) 1986-08-20

Family

ID=6152793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82111954A Expired EP0085786B1 (fr) 1982-01-09 1982-12-23 Antenne télescopique et dispositif pour l'actionner

Country Status (5)

Country Link
US (1) US4520365A (fr)
EP (1) EP0085786B1 (fr)
JP (1) JPS58130603A (fr)
DE (2) DE3200444A1 (fr)
ES (1) ES276313Y (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5521442A (en) * 1994-02-18 1996-05-28 General Motors Corporation Automatic power antenna retraction
US5714958A (en) * 1996-05-21 1998-02-03 Ericsson Inc. Antenna extender system
EP1014475A4 (fr) 1997-01-28 2000-10-18 Yokowo Seisakusho Kk Antenne actionnee par moteur
US7190319B2 (en) * 2001-10-29 2007-03-13 Forster Ian J Wave antenna wireless communication device and method
US6630910B2 (en) * 2001-10-29 2003-10-07 Marconi Communications Inc. Wave antenna wireless communication device and method
EP1446766B1 (fr) * 2001-10-29 2010-06-09 Mineral Lassen LLC Dispositif de radiocommunications a antenne ondulee, et procede correspondant
GB0318134D0 (en) * 2003-08-01 2003-09-03 Gatan Uk Specimen tip and tip holder assembly
US8284109B2 (en) * 2007-10-31 2012-10-09 Lockheed Martin Corporation Telescoping radar array
KR20090065345A (ko) * 2007-12-17 2009-06-22 현대자동차주식회사 신축 가능한 통합형 안테나
KR20160063017A (ko) * 2014-11-26 2016-06-03 권오성 진공 포장 장치
EP3208665B1 (fr) * 2016-02-18 2019-01-02 Blancpain SA. Affichage retrograde d'horlogerie a aiguille retractable

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2222588A (en) * 1940-06-07 1940-11-19 Timothy F Williams Extensible antenna
DE881965C (de) * 1951-12-09 1953-07-06 Hirschmann Radiotechnik Teleskopantenne mit Fernbetaetigung
DE1679512U (de) * 1952-03-04 1954-07-08 Anton Kathrein Fabrik Elektrot Auszugantenne.
US2709220A (en) * 1954-01-25 1955-05-24 Nat Electronic Mfg Corp Extensible and retractible antenna
FR2208204B1 (fr) * 1972-11-29 1978-02-10 Bellomayre Michel De
JPS5489548A (en) * 1977-12-27 1979-07-16 Harada Ind Co Ltd Automotive antenna

Also Published As

Publication number Publication date
DE3272776D1 (en) 1986-09-25
DE3200444C2 (fr) 1990-05-31
ES276313U (es) 1984-07-16
US4520365A (en) 1985-05-28
JPS58130603A (ja) 1983-08-04
ES276313Y (es) 1985-02-16
DE3200444A1 (de) 1983-07-21
EP0085786A1 (fr) 1983-08-17

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