FR2618396A1 - Device for heating a rear-view mirror and rear-view mirrors equipped with such a device - Google Patents

Device for heating a rear-view mirror and rear-view mirrors equipped with such a device Download PDF

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Publication number
FR2618396A1
FR2618396A1 FR8710447A FR8710447A FR2618396A1 FR 2618396 A1 FR2618396 A1 FR 2618396A1 FR 8710447 A FR8710447 A FR 8710447A FR 8710447 A FR8710447 A FR 8710447A FR 2618396 A1 FR2618396 A1 FR 2618396A1
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France
Prior art keywords
circuit
view mirror
mirror
heating
glass
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FR8710447A
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French (fr)
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FR2618396B3 (en
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Individual
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Priority to FR8710447A priority Critical patent/FR2618396B3/en
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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/84—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields
    • H05B3/845—Heating arrangements specially adapted for transparent or reflecting areas, e.g. for demisting or de-icing windows, mirrors or vehicle windshields specially adapted for reflecting surfaces, e.g. bathroom - or rearview mirrors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R1/00—Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
    • B60R1/02—Rear-view mirror arrangements
    • B60R1/06—Rear-view mirror arrangements mounted on vehicle exterior
    • B60R1/0602—Rear-view mirror arrangements mounted on vehicle exterior comprising means for cleaning or deicing

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Mechanical Engineering (AREA)
  • Surface Heating Bodies (AREA)

Abstract

The invention relates to a device for heating a rear-view mirror for a motor vehicle. The device according to the invention is characterised by the fact that it is made up of a flexible support 1 made of polyester or mylar cut to the shape of the glass 8 of the rear-view mirror and on which there is deposited, by silk screen printing, an electric circuit 2 using a resistive ink, the two ends 3 of the said circuit 2 each being provided with a terminal 4 for connection to an electric supply circuit, the face of the said support 1 provided with the said circuit 2 being covered by a double-sided adhesive 6 for welding it onto the back face of the glass 7 of the rear-view mirror. Application to the motor industry.

Description

Dispositif de chauffage d'un rétroviseur et rétroviseurs équipés d'un tel dispositif.Device for heating a rear-view mirror and rear-view mirrors equipped with such a device.

L'invention concerne un dispositif de chauffage d'un rétroviseur pour véhicule automobile ainsi que les rétroviseurs équipés d'un tel dispositif.The invention relates to a device for heating a rear-view mirror for a motor vehicle as well as to rear-view mirrors equipped with such a device.

Pour dégivrer ou désembuer rapidement la glace d'un rétroviseur de véhicule automobile, on a proposé depuis longtemps d'équiper le rétroviseur d'un système de chauffage à résistance électrique alimenté par la batterie du véhicule, sous la commande d'un interrupteur.To quickly defrost or demist the window glass of a motor vehicle mirror, it has long been proposed to equip the mirror with an electric resistance heating system powered by the vehicle battery, under the control of a switch.

Diverses solutions ont été proposées à cet effet. En particulier, on utilise des circuits imprimés ou gravés avec un matériau résistif sur un support rigide, ou des bandes découpées en aluminium ou en cuivre, ainsi que des résistances en céramique. Le matériau resistif, placé au voisinage de la glace, est très exposé aux agents atmosphériques qui pénètrent à l'intérieur du rétroviseur et est très rapidement oxydé. C'est ainsi qu'après des essais de vieillissement accéléré aux brouillards salins, le circuit est très vite attaqué et détruit.Various solutions have been proposed for this purpose. In particular, use is made of printed circuits or etched with a resistive material on a rigid support, or strips cut out of aluminum or copper, as well as ceramic resistors. The resistive material, placed in the vicinity of the glass, is very exposed to atmospheric agents which penetrate inside the mirror and is very quickly oxidized. Thus after accelerated aging tests with salt spray, the circuit was quickly attacked and destroyed.

La présente invention vise à obtenir un dispositif de chauffage ne présentant pas cet inconvénient et qui soit en outre de fabrication et de pose simples et économiques.The present invention aims to obtain a heating device which does not have this drawback and which is also simple and economical to manufacture and install.

A cet effet, le dispositif selon l'invention est caractérisé par le fait qu'il est constitué par un support souple en polyester ou mylar découpé à la forme de la glace du rétroviseur et sur lequel est déposé par sérigraphie un circuit électrique en une encre résistive, les deux extrémités dudit circuit étant munies chacune d'une cosse de raccordement à un circuit d'alimentation électrique, la face dudit support munie dudit circuit étant recouverte par un adhésif double face pour son collage sur la face postérieure de la glace du rétroviseur.  To this end, the device according to the invention is characterized in that it is constituted by a flexible polyester or mylar support cut out in the shape of the mirror glass and on which is deposited by screen printing an electrical circuit in ink resistive, the two ends of said circuit each being provided with a terminal for connection to an electrical supply circuit, the face of said support provided with said circuit being covered by a double-sided adhesive for its bonding to the rear face of the mirror glass .

Le dispositif selon l'invention assure une étanchéité totale du circuit résistif vis-à-vis de l'atmosphère ambiante puisque ce circuit est emprisonné entre la glace et le support souple. Ce support souple permet une adaptation sur des glaces non planes et sa souplesse permet de prévoir que les cosses de raccordement sont fixées, par exemple rivetées sur des languettes découpées dans le support souple lui-même, ce qui facilite le montage.The device according to the invention ensures complete sealing of the resistive circuit with respect to the ambient atmosphere since this circuit is trapped between the glass and the flexible support. This flexible support allows adaptation to non-flat glass and its flexibility makes it possible to provide that the connection lugs are fixed, for example riveted on tabs cut from the flexible support itself, which facilitates assembly.

Le contact direct entre la résistance et la glace assure un rendement calorifique maximal et le circuit est autorégulant. On détermine ce circuit de manière à lui donner une valeur ohmique permettant d'obtenir le point chaud qui est parfois exigé. Le circuit peut être muni d'une thermistance pour limiter la température atteinte. Avantageusement, le dispositif comprend deux circuits résistifs ayant leurs deux extrémités communes, de manière à assurer une diffusion de chaleur plus uniforme.Direct contact between the resistor and the glass ensures maximum heat output and the circuit is self-regulating. This circuit is determined so as to give it an ohmic value making it possible to obtain the hot spot which is sometimes required. The circuit can be fitted with a thermistor to limit the temperature reached. Advantageously, the device comprises two resistive circuits having their two common ends, so as to ensure a more uniform heat diffusion.

L'encre résistive est de préférence constituée d'argent et de carbone.The resistive ink is preferably made of silver and carbon.

L'invention sera bien comprise à la lecture de la description suivante faite en se référant au dessin annexé dans lequel: - la figure 1 est une vue schématique en coupe d'un miroir en cours d'équipement par un dispositif de chauffage selon un exemple de réalisation de l'invention, et - la figure 2 est une vue en plan du dispositif de chauffage de la figure 1.The invention will be clearly understood on reading the following description made with reference to the appended drawing in which: - Figure 1 is a schematic sectional view of a mirror being fitted by a heating device according to an example of the invention, and - Figure 2 is a plan view of the heating device of Figure 1.

Le dispositif selon l'invention est constitué par un support souple 1 en polyester ou mylar, sur lequel est déposé par sérigraphie un circuit 2 en encre résistive, par exemple en argent-carbone. Les extrémités 3 du circuit 2 sont munies chacune d'une cosse de contact 4 fixée par un rivet 5. La cosse 4 peut être, selon les besoins, sensiblement parallèle au support 1 (comme représenté au dessin) ou bien lui être orthogonale.The device according to the invention consists of a flexible support 1 made of polyester or mylar, on which is deposited by screen printing a circuit 2 in resistive ink, for example in silver-carbon. The ends 3 of the circuit 2 are each provided with a contact lug 4 fixed by a rivet 5. The lug 4 can be, as required, substantially parallel to the support 1 (as shown in the drawing) or else be orthogonal to it.

La face du support 1 sur laquelle est déposé le circuit 2 est recouverte d'une feuille adhésive double face 6 qui, avant montage sur la face interne d'un miroir 7, est recouverte d'une pellicule arrachable (non représentée) qui est enlevée juste avant le collage (selon les flèches) sur cette face interne. Le circuit 2 est ainsi parfaitement à l'abri des agents atmosphériques et directement en contact avec la glace qu'il doit chauffer. Le support souple 1 épouse parfaitement la forme courbée de la glace 7.The face of the support 1 on which the circuit 2 is deposited is covered with a double-sided adhesive sheet 6 which, before mounting on the internal face of a mirror 7, is covered with a removable film (not shown) which is removed just before bonding (according to the arrows) on this internal face. Circuit 2 is thus perfectly sheltered from atmospheric agents and directly in contact with the ice that it must heat. The flexible support 1 perfectly matches the curved shape of the glass 7.

Dans la forme de réalisation représentée à la figure 2, deux circuits 2 et 2' sont prévus afin de recouvrir plus uniformément la glace. Les deux extrémités 3 de chacun des circuits 2 et 2' sont communes et raccordées chacune à une cosse de contact 4.In the embodiment shown in Figure 2, two circuits 2 and 2 'are provided to more uniformly cover the ice. The two ends 3 of each of the circuits 2 and 2 'are common and each connected to a contact terminal 4.

En outre, chacune de ces extrémités 3 est entourée par une languette 8 découpée dans le support souple 1, cette languette 8 assurant une certaine facilite de déplacement élastique de la cosse de contact 4 en vue de sa connexion. In addition, each of these ends 3 is surrounded by a tongue 8 cut from the flexible support 1, this tongue 8 ensuring a certain ease of elastic movement of the contact terminal 4 for its connection.

Claims (6)

REVENDICATIONS 1.- Dispositif de chauffage d'un rétroviseur pour véhicule automobile, caractérisé par le fait qu'il est constitué par un support souple (1) en polyester ou mylar découpé à la forme de la glace (8) du rétroviseur et sur lequel est déposé par sérigraphie un circuit électrique (2) en une encre résistive, les deux extrémités (3) dudit circuit (2) étant munies chacune d'une cosse de raccordement (4)- à un circuit d'alimentation électrique, la face dudit support (1) munie dudit circuit (2) étant recouverte par un adhésif double face (6) pour son collage sur la face postérieure de la glace (7) du rétroviseur.1.- Device for heating a rear-view mirror for a motor vehicle, characterized in that it is constituted by a flexible support (1) made of polyester or mylar cut to the shape of the glass (8) of the rear-view mirror and on which is screen printed an electrical circuit (2) in a resistive ink, the two ends (3) of said circuit (2) being each provided with a connection terminal (4) - to an electrical supply circuit, the face of said support (1) provided with said circuit (2) being covered by a double-sided adhesive (6) for its bonding to the rear face of the mirror (7) of the mirror. 2.- Dispositif selon la revendication 1, caractérisé par le fait que les cosses de raccordement (4) sont fixées, par exemple rivetées, sur des languettes (8) découpées dans le support souple (1).2.- Device according to claim 1, characterized in that the connection lugs (4) are fixed, for example riveted, on tabs (8) cut from the flexible support (1). 3.- Dispositif selon l'une des revendications 1 et 2, caractérisé par le fait que le circuit (2) est muni d'une thermistance pour limiter la température atteinte.3.- Device according to one of claims 1 and 2, characterized in that the circuit (2) is provided with a thermistor to limit the temperature reached. 4.- Dispositif selon l'une des revendications 1 à 4, caractérisé par le fait qu'il comprend deux circuits résistifs (2,2') ayant leurs deux extrémités (3) communes.4.- Device according to one of claims 1 to 4, characterized in that it comprises two resistive circuits (2,2 ') having their two ends (3) common. 5.- Dispositif selon l'une des revendications 1 à 4, caractérisé par le fait que l'encre résistive est constituée d'argent et de carbone.5.- Device according to one of claims 1 to 4, characterized in that the resistive ink consists of silver and carbon. 6.- Rétroviseur pour véhicule automobile, caractérisé par le fait qu'il est muni d'un dispositif de chauffage selon l'une des revendications 1 à 5. 6. A rear-view mirror for a motor vehicle, characterized in that it is provided with a heating device according to one of claims 1 to 5.
FR8710447A 1987-07-23 1987-07-23 DEVICE FOR HEATING A MIRROR AND MIRRORS EQUIPPED WITH SUCH A DEVICE Expired - Lifetime FR2618396B3 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8710447A FR2618396B3 (en) 1987-07-23 1987-07-23 DEVICE FOR HEATING A MIRROR AND MIRRORS EQUIPPED WITH SUCH A DEVICE

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8710447A FR2618396B3 (en) 1987-07-23 1987-07-23 DEVICE FOR HEATING A MIRROR AND MIRRORS EQUIPPED WITH SUCH A DEVICE

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FR2618396A1 true FR2618396A1 (en) 1989-01-27
FR2618396B3 FR2618396B3 (en) 1990-03-23

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2671258A1 (en) * 1990-12-27 1992-07-03 Harman H Reydel Automobile Device for heating the rear-view (wing) mirror of motor vehicles
EP0496485A1 (en) * 1991-01-19 1992-07-29 Britax (Geco) S.A. Electrically heated vehicle mirror
FR2678466A1 (en) * 1991-06-27 1992-12-31 Navarra Componentes Electronic Heating device employing contact heat transfer
FR2874416A1 (en) * 2004-08-17 2006-02-24 Eric Muchembled Reflective thermal insulation heating device, has copper or metal alloy strips glued or soldered on surface of reflective thermal insulation, and having ends connected to low-voltage power supply by unit that conduct electricity
EP2393337A1 (en) 2010-06-07 2011-12-07 SMR Patents S.à.r.l. Heating device
DE102011108640A1 (en) 2011-05-20 2012-11-22 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Electrical heatable mirror component for outside mirror of motor car, has face portion for heating additional component and released relative to another face portion and arranged at component surface

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2671258A1 (en) * 1990-12-27 1992-07-03 Harman H Reydel Automobile Device for heating the rear-view (wing) mirror of motor vehicles
EP0496485A1 (en) * 1991-01-19 1992-07-29 Britax (Geco) S.A. Electrically heated vehicle mirror
FR2678466A1 (en) * 1991-06-27 1992-12-31 Navarra Componentes Electronic Heating device employing contact heat transfer
FR2874416A1 (en) * 2004-08-17 2006-02-24 Eric Muchembled Reflective thermal insulation heating device, has copper or metal alloy strips glued or soldered on surface of reflective thermal insulation, and having ends connected to low-voltage power supply by unit that conduct electricity
EP2393337A1 (en) 2010-06-07 2011-12-07 SMR Patents S.à.r.l. Heating device
DE102011108640A1 (en) 2011-05-20 2012-11-22 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Electrical heatable mirror component for outside mirror of motor car, has face portion for heating additional component and released relative to another face portion and arranged at component surface

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Publication number Publication date
FR2618396B3 (en) 1990-03-23

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