EP0447182B1 - Dispositif de commande d'extension et de rétraction d'une antenne à moteur - Google Patents

Dispositif de commande d'extension et de rétraction d'une antenne à moteur Download PDF

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Publication number
EP0447182B1
EP0447182B1 EP91302063A EP91302063A EP0447182B1 EP 0447182 B1 EP0447182 B1 EP 0447182B1 EP 91302063 A EP91302063 A EP 91302063A EP 91302063 A EP91302063 A EP 91302063A EP 0447182 B1 EP0447182 B1 EP 0447182B1
Authority
EP
European Patent Office
Prior art keywords
motor
drive
driven
shock absorber
substrate
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 - Lifetime
Application number
EP91302063A
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German (de)
English (en)
Other versions
EP0447182A1 (fr
Inventor
Masaki Shinkawa
Kiyoshi Tetsuka
Koji Arata
Misao Kimura
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.)
Harada Industry Co Ltd
Original Assignee
Harada Industry Co Ltd
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 Harada Industry Co Ltd filed Critical Harada Industry Co Ltd
Publication of EP0447182A1 publication Critical patent/EP0447182A1/fr
Application granted granted Critical
Publication of EP0447182B1 publication Critical patent/EP0447182B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/27—Adaptation for use in or on movable bodies
    • H01Q1/32—Adaptation for use in or on road or rail vehicles

Definitions

  • the present invention relates to a drive control apparatus for an electrically-driven type extensible/retractable antenna as mounted on, for example, an automobile, etc.
  • An electrically-driven type extensible/retractable antenna mounted on an automobile, etc. is generally so formed that, when an associated motor is rotated in a normal or a reverse direction, a telescopic antenna element is extended or retracted.
  • the antenna element upon being brought to an extension or retraction motion limit, is not further moved. In this case an excessive load is abruptly applied to the motor. With such a situation left continued, an excessive current continues to flow in the motor winding, causing its burning.
  • a clutch is usually interposed between the motor side and the antenna side.
  • the clutch is of such a type that a clutch plate on a driving side (a motor side) and clutch plate on a driven side (an antenna side) are so oppositely arranged that they are slidably moved relative to each other with a given frictional resistance.
  • the driving-and driven-side clutch plates are subject to a slip motion, temporarily releasing their motor- and antenna-side coupling.
  • the clutch as set out above produces a louder noise upon the slip motion of its clutch plates and causes a severe friction, resulting in a drop in pressure of the clutch in a relatively shorter period of time. Therefore, no rotational force is transmitted from the driving-side to the driven-side, failing to obtain a reliable operation over a longer period of time.
  • GB-A-2187597 discloses a motorised antenna apparatus which comprises a motor the output of which is ultimately transmitted to a rack which drives an extensible antenna rod.
  • the transmission is via a damper which principally comprises a coil of resilient metal wire which, when the antenna reaches the extent of its movement in one direction or the other, deforms thereby reducing the stress on the motor.
  • US-4514670 discloses a motor and control circuitry.
  • the circuitry comprises means for sensing when the motor current is indicative that a positioned element has reached a limiting position.
  • Such a motor and control apparatus can be used, according to this document, for instance for driving vehicle antenna.
  • An alternative arrangement is shown in US-4749924.
  • the control circuit in this document also senses when a limiting position is reached by sensing when a load on the motor exceeds a reference level. At this level the motor is de-activated.
  • WO 83/03715 discloses a motorised vehicle antenna drive system which incorporates a clutch, again for the purpose of reducing the strain on the drive motor.
  • a drive control apparatus for an electrically-driven extensible/retractable antenna, comprising: a control circuit connected to a power supply; a motor controllable by the control circuit to be rotated in a normal or a reverse direction; a multi-threaded type worm provided on an output shaft of the motor; a worm wheel engaging with the worm; a drive gear receiving a rotational force of the worm wheel to allow it to be rotatably driven; a drive rope having a rack in mesh with the drive gear and adapted to be moved in a longitudinal direction upon the rotation of the drive gear; an extensible/retractable antenna element driven by the drive rope to be extended or retracted; stopper means for mechanically stopping an extending or a retracting motion of the antenna element when the extensible/retractable antenna element reaches an extension or a retraction limit; a shock absorber for alleviating an impact force by which the extensible/retractable antenna element is stopped upon collision with the stopper means, the shock absorber
  • the aforementioned means has the following functions.
  • a rotational force on the motor side is transmitted to the antenna side through a shock absorber made up principally of an elastic member present partway on a movable system leading to the impact portions from the motor output shaft.
  • a shock absorber made up principally of an elastic member present partway on a movable system leading to the impact portions from the motor output shaft.
  • the mechanism of a drive system leading to the motor side from the shock absorber is stopped after the elastic member of the shock absorber has been somewhat further compressed by an inertial moment.
  • This action absorbs the inertial moment on the driving side including the motor and hence alleviates an impact involved upon the stopping of the action. Further, an abrupt increase in the load involved can be alleviated on the motor side.
  • the motor's power supply is interrupted. Therefore, the present invention detects a final sharp rise of the lead current as motion stop information and uses it as a power supply interruption instruction so that it is possible to stably and properly interrupt the power supply to the motor.
  • the present invention obviates the need to provide any clutch plates which would be required on the conventional apparatus, there is no slip involved between the clutch plates and hence no loud clutch noise resulting from such a slip. Since the present invention uses a multi-threaded worm, a greater lead can be imparted to the thread. Therefore the motor can be rotated from the worm wheel through the worm. At the time when the motor is stopped, the antenna element can be manually extended or retracted, imparting an added operability to the antenna element.
  • an electrically-driven type extensible/retractable antenna drive control apparatus comprises a control circuit 3 incorporated in a casing 2 of an apparatus body 1 and connected to a power supply, not shown; a motor 4 reversibly controlled by the control circuit 3; a multi-threaded worm 5 provided on an output shaft of the motor 4; a worm wheel 6 engaging with the worm 5; a drive gear 8 to which the rotational force of the worm wheel 6 is transmitted through a relay gear 7; a drive rope 9 moved in its longitudinal direction in accordance with the rotation of the drive gear 8 and made of, for example, a rigid synthetic resin; and a telescoping-type extensible/retractable antenna element 10 driven by the drive rope 9 in an extensible/ retractable fashion.
  • first and second stoppers 12A and 12B are provided, the first stopper 12A being provided in an antenna storage cylinder 11 relative to the casing 2 and the second stopper 12B being provided in the casing 2 at a location where the base end of the storage cylinder 11 is mounted.
  • a shock absorber 13 and switching means 14 are provided in the present embodiment.
  • the shock absorber 13 is provided partway on a route from the motor's output shaft to the impact portion 10A or 10B and made up principally of an elastic member.
  • the switching means 14 are arranged in the control circuit 3 so that, when the shock absorber 13 stops its elastic deformation, the supply of electric power to the motor may be interrupted.
  • the shock absorber 13 of the present invention includes a movable type variation restriction stopper, not shown in Fig. 1, which is of such a type that, when an amount of elastic deformation of the elastic member reaches a preset value, any further deformation is mechanically prevented.
  • the shock absorber 13 of the present embodiment is of such a type as to be applied to, or incorporated into, the drive gear 8 which constitutes one component of a rotation mechanism. That is, the shock absorber 13 includes a disc-like substrate 20 on the driving side which is given a drive force from the motor side and a disc-like substrate 30 on the driven side which is arranged concentric with the substrate 20 to transmit a rotational force to the antenna side.
  • the shock absorber 13 further includes a coil spring 40 disposed between these substrates 20 and 30 and engaged at one end with a projection 23 of the driving-side substrate 20 and at the other side with a projection 33 of the driven-side substrate 30 to transmit the rotational force of the substrate 20 to the substrate 30.
  • the shock absorber 13 also includes the aforementioned displacement restriction stopper 50 (hereinafter referred to a movable stopper 50) which is rotatably provided in an annular spring insertion area present in the substrates 20 and 30 to allow an amount of elastic deformation of the coil spring 40 to be restricted to a value below the preset value.
  • a movable stopper 50 which is rotatably provided in an annular spring insertion area present in the substrates 20 and 30 to allow an amount of elastic deformation of the coil spring 40 to be restricted to a value below the preset value.
  • the driving-side substrate 20 is one piece molded of, for example, a rigid synthetic resin and has a cylindrical axial section 21 at its central area and a gear section 22 at its outer periphery which engages with the aforementioned relay gear 7.
  • a projection 23 is provided on the substrate 20 at an area facing the substrate 30 and serves as a rotational force transmission element.
  • the projection 23 is sector-like in configuration and hollow-cylindrical as shown in Fig. 3 and engages with both the ends of the coil spring 40 as set out in more detail below.
  • the driven-side substrate 30 is one piece molded of, for example, a rigid synthetic resin and has a cylindrical axial section 31 at its central area and a gear section 32 at its outer periphery which engages with a rack of the drive rope 9 to allow a motion of an antenna element.
  • a projection 33 is provided on the driven-side substrate 30 at an area facing the driving-side substrate 20 and serves as a rotational force transmission element.
  • the projection 33 is formed, as a circular sector-like one, along a peripheral direction of the substrate 30 as indicated by a broken line in Fig. 3, and engages with both the ends of the coil spring 40.
  • the coil spring 40 is placed between these substrates 20 and 30 and comprised of a spiral spring of a few turns with both the end portions bent toward the center axis of the substrate, the spiral spring being made of, for example, a piano wire. Both the bent end portions of the spiral spring are located with the projections 23 and 33 of the substrates 20 and 30, respectively, sandwiched therebetween.
  • the coil spring 40 presses its one end 41 into pressure contact with the projection 23 or 33, and its other end 42 into pressure contact with the projection 33 or 23, upon the relative rotation of the projections 23 and 33 of both the substrates 20 and 30. By so doing, the rotational force of the substrate 20 is transmitted to the substrate 30. Since the shock absorber 13 has the coil spring 40 located between the substrates 20 and 30, it can be made compact as a whole.
  • the movable stopper 50 is one piece molded of, for example, a rigid synthetic resin and, is formed so that its top view has a part-circular as shown in Fig. 6 and its cross section has a lattice-shape as shown in Fig. 7.
  • the stopper 50 has a gap G corresponding to an included angle ⁇ of about 120° and both the end faces of the gap G provide stopper faces 51 and 52.
  • reference numeral 61 shows a slidable washer interposed between the connection surfaces of the cylindrical axial section 21 of the substrate 20 and the cylindrical axial section 31 of the substrate 30; and 62, a slidable ring interposed between the facing surfaces of the outer periphery of the substrate 20 and inner periphery of the substrate 30.
  • the slidable washer and ring as set out above perform a lubrication function.
  • Fig. 8 shows a state of a major area of the shock absorber 13, in the extending state of the antenna element 10.
  • one side surface (left side surface in the Figure) of the driving-side projection 23 is placed in pressure contact with the inner side surface of the bent end portion 41 of the coil spring 40, and the one end face (right end face in the Figure) of the driven-side projection 33 is placed in pressure contact with the inner side surface of the bent end other portion 42 of the coil spring 40.
  • the angular relation of these parts are so set as shown in Fig. 8.
  • Fig. 9 shows the state of the major area of the shock absorber 13 with the extending motion of the antenna element 10 being completed and the motor power supply being interrupted.
  • the motor 4 continues its rotation and the driving-side projection 23 tries to rotate in a direction away from the driven-side projection, that is, in the counter-clockwise direction in Fig. 9.
  • the coil spring 40 is compressed in an inner direction. Since, however, the ends 41 and 42 of the spring abut against stops faces 51 and 52 of the stopper 50, respectively, its elastic deformation is restricted, enhancing the withstand characteristic of the coil spring 40 under the elastic deformation restriction action and thus using it for an extended period of time.
  • the control circuit 3 includes a resistor 77 connected to a motor drive circuit MDC, an integrator 78 for calculating the integration value of a motor drive current flowing through the resistor 77, and a comparator 79 for comparing a past integration current value which is calculated by the integrator 78 with a preset value to see whether or not the former value exceeds the latter value.
  • the circuit 3 as set out above is characterized in that the motor drive circuit MDC is interrupted in accordance with an output result of the comparator and that, after interrupting the current of the motor drive circuit MDC, the motor is open-circuited at both the ends and then reverse-rotated through the release of an energy stored in the drive mechanism system.
  • reference numeral 70 denotes a battery mounted on an automobile and 71, a key switch.
  • the key switch 71 sends a +B output when the key position of the key switch 71 is OFF, sends +B and Acc outputs when the key position of the key switch is Acc, sends +B, Acc and Ig outputs when the key position of the key switch is ON and sends +B and Ig outputs when the key position of the key switch is ST.
  • 72 shows a switch operated in association with the ON and OFF of, for example, a radio; 73, a trigger pulse generator triggered when the antenna is extended or moved upward; 74, a trigger pulse generator triggered when the antenna is retracted or moved downward; 75, a timer; 76, a relay; 76A and 76B, relay contacts; 77, the resistor for current detection; 78, the integrator; 79, the comparator; 79a, a preset-input terminal; 14A and 14B, NPN type transistors serving as a switching means 14; IV1 to IV3, inverters; D, a diode; NAND, a NOT-AND gate; OR, an OR gate; AND, an AND gate; +B, Acc, Ig, GND, MA and MB, terminals.
  • the aforementioned control circuit 3 can be made compact because the motor drive circuit MDC is comprised of the switching means 14 made of a semiconductor. Further, since the motor is open-circuited at its ends upon the interruption of a power supply to the motor, it is easy to rotate the motor 4, for example, manually from the worm wheel 6 side. An increase in the current of the motor is detected as a practical value corresponding to a past performance value through the use of the integration element, whereby when the practical value exceeds the preset value the current in the motor is interrupted. Therefore, there is no possibility that the motor will be stopped by an operation error originating in a disturbance such as a variation in a power supply level.
  • a coil spring 81 interposed between the first stopper 12A and an enlarged base end 101 of the antenna element 100 as shown in Fig. 11.
  • a coil spring 84 interposed between a forward end 9A of the rope 9 and a reduced-diameter base end 111 of the antenna element 110 with a pair of joints 82, 83 provided one at the base end 111 side of the antenna element and one at the forward end 9A side of the rope 9 as shown in Fig. 12.
  • the movable stopper 50 has been explained as the deformation restriction stopper for the coil spring 40, a fixed stopper may be used which is formed integral with the driven-side substrate 30.

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  • Details Of Aerials (AREA)

Claims (4)

  1. Appareil de commande d'entraînement pour une antenne extensible/rétractable entraînée électriquement, comprenant:
       un circuit de commande (3) connecté à une source d'énergie électrique;
       un moteur (4) pouvant être commandé par le circuit de commande (3) de manière à être entraîné en rotation en sens normal ou en sens inverse;
       une vis sans fin (5) du type à filets multiples prévue sur l'arbre de sortie du moteur (4);
       une roue (6) de vis sans fin engrènant avec la vis sans fin (5);
       un pignon d'entraînement (8) recevant une force de rotation de la roue (6) de vis sans fin pour être entraîné en rotation;
       un câble d'entraînement (9) comportant une crémaillère engrènant avec le pignon d'entraînement (8) et adapté pour être déplacé dans une direction longitudinale lors de la rotation du pignon d'entraînement (8);
       un élément (10), formant antenne extensible/rétractable, entraîné par le câble d'entraînement (9) de manière à être amené en position sortie ou en position rentrée;
       un moyen d'arrêt (12A, 12B) pour arrêter mécaniquement le mouvement de sortie ou le mouvement de rentrée de l'élément (10) d'antenne quand l'élément formant antenne extensible/rétractable atteint une limite de sortie ou une limite de rentrée;
       un amortisseur (13) de choc pour atténuer la force d'impact par laquelle l'élément (10) formant antenne extensible/rétractable est arrêté lors de la collision avec le moyen d'arrêt (12A, 12B), l'amortisseur de choc étant positionné dans la ligne de transmission allant de l'arbre de sortie du moteur (4) jusqu'aux parties d'impact qui entrent en collision avec le moyen d'arrêt (12A, 12B); et
       une moyen d'interruption (14) disposé dans le circuit de commande (3) et adapté pour couper l'alimentation en énergie électrique du moteur (4) quand la déformation élastique de l'amortisseur (13) de choc cesse,
       l'amortisseur (13) de choc comprenant:
       un substrat (20) analogue à un disque disposé sur le côté entraînement d'un mécanisme de rotation menant au pignon d'entraînement (8) depuis la roue (6) de vis sans fin et adapté pour être entraîné en rotation quand une force d'entraînement est reçue du côté moteur (4);
       un substrat (30) analogue à un disque, disposé sur le côté entraîné, concentriquement au substrat (20) du côté entraînement pour transmettre une force de rotation reçue sur le côté antenne (10); et
       un ressort hélicoïdal (40) disposé concentriquement entre le substrat (20) du côté entraînement et le substrat (30) du côté entraîné et en contact, à une de ses extrémités, avec une partie du substrat (20) du côté entraînement et, à son autre extrémité, avec une partie du substrat (30) du côté entraîné, de manière à transmettre ainsi la force de rotation du substrat (20) du côté entraînement au substrat (30) du côté entraîné;
       caractérisé en ce que l'amortisseur (13) de choc comprend, en outre, une butée (50) du type mobile disposé de façon tournante dans une zone annulaire d'insertion de ressort présente entre les substrats (20, 30) du côté entraînement et du côté entraîné, de manière à limiter la quantité de déformation élastique du ressort hélicoïdal (40) pour la maintenir en dessous d'une valeur prédéterminée par limitation mécanique de la déformation du ressort hélicoïdal (40) quand la quantité de déformation élastique du ressort hélicoïdal (40) atteint une valeur prédéterminée.
  2. Appareil de commande d'entraînement selon la revendication 1, dans lequel ledit circuit de commande (3) comprend:
       une résistance électrique (77) interposée dans un circuit d'entraînement de moteur (MDC);
       un intégrateur (78) destiné à trouver une valeur d'intégration d'un courant d'entraînement de moteur dans la résistance (77); et
       un comparateur (79) pour comparer la valeur d'intégration correspondant à un courant d'entraînement antérieur, trouvée par l'intégrateur (78), avec la valeur prédéterminée et pour déterminer si oui ou non il dépasse la valeur prédéterminée;
       le circuit d'entraînement de moteur étant interrompu en fonction du résultat de sortie du comparateur (79).
  3. Appareil de commande d'entraînement selon la revendication 1, dans lequel le circuit de commande (3) fonctionne de manière telle qu'après l'interruption du courant dans le circuit d'entraînement de moteur (MDC), le moteur (4) est en circuit ouvert à ses deux extrémités pour que ce moteur (4) puisse tourner en sens inverse grâce à la libération d'une énergie qui est stockée dans un système de mécanisme d'entraînement.
  4. Appareil de commande d'entraînement selon la revendication 1, dans lequel ledit circuit de commande (3) est disposé dans un boîtier du corps (1) de l'appareil.
EP91302063A 1990-03-16 1991-03-12 Dispositif de commande d'extension et de rétraction d'une antenne à moteur Expired - Lifetime EP0447182B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2064410A JP2533217B2 (ja) 1990-03-16 1990-03-16 電動伸縮形アンテナ駆動制御装置
JP64410/90 1990-03-16

Publications (2)

Publication Number Publication Date
EP0447182A1 EP0447182A1 (fr) 1991-09-18
EP0447182B1 true EP0447182B1 (fr) 1995-11-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP91302063A Expired - Lifetime EP0447182B1 (fr) 1990-03-16 1991-03-12 Dispositif de commande d'extension et de rétraction d'une antenne à moteur

Country Status (5)

Country Link
EP (1) EP0447182B1 (fr)
JP (1) JP2533217B2 (fr)
KR (1) KR940000690B1 (fr)
DE (1) DE69114157T2 (fr)
ES (1) ES2081430T3 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5959593A (en) * 1995-02-06 1999-09-28 Nippon Antenna Company Limited Device for telescoping a power antenna
JPH11125314A (ja) * 1997-10-24 1999-05-11 Harada Ind Co Ltd スパイラルロープ及び駆動力伝達装置
MX2010008830A (es) * 2008-02-11 2010-12-20 Amphenol Corp Antena de multi-haz con unidad de control de multi-dispositivo.
CN113071709A (zh) * 2021-03-17 2021-07-06 哈尔滨工业大学 一种空间大型自展开伸展臂

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2512791C3 (de) * 1975-03-22 1981-12-03 Richard Hirschmann Radiotechnisches Werk, 7300 Esslingen Überlastschalteinrichtung für Antriebe von Fahrzeugteleskopantennen
EP0106882A4 (fr) * 1982-04-09 1984-09-11 Nat Ind Inc Antenne escamotable actionnee par un moteur.
DE3226614A1 (de) * 1982-07-16 1984-01-19 Robert Bosch Gmbh, 7000 Stuttgart Schaltungsanordnung zum ein- und ausfahren einer motorgetriebenen antenne
DE3425391C2 (de) * 1984-07-10 1993-11-18 Yokowo Seisakusho Kk Vorrichtung zum Ausschieben und Einziehen eines Antennenstabes
JPS62206902A (ja) * 1986-03-06 1987-09-11 Asmo Co Ltd 電動アンテナ装置
JPH0770894B2 (ja) * 1986-06-27 1995-07-31 日本電装株式会社 車両用車室外備品駆動装置
JPH066570Y2 (ja) * 1987-07-10 1994-02-16 原田工業株式会社 電動伸縮アンテナ駆動制御装置
EP0320242B1 (fr) * 1987-12-08 1993-12-01 Harada Industry Co., Ltd. Dispositif d'antenne à moteur pour véhicules

Also Published As

Publication number Publication date
DE69114157T2 (de) 1996-04-04
EP0447182A1 (fr) 1991-09-18
KR910017695A (ko) 1991-11-05
ES2081430T3 (es) 1996-03-16
JP2533217B2 (ja) 1996-09-11
DE69114157D1 (de) 1995-12-07
KR940000690B1 (ko) 1994-01-27
JPH03266505A (ja) 1991-11-27

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