FR2751283A1 - SIMPLIFIED DASHBOARD - Google Patents

Abstract

The dashboard of the invention, for a motor vehicle, comprises: - an indicating movement (4, 9), - a serigraphy of indicating characters (8), - a source (12) of illumination of serigraphy characters ( 8), - a printed circuit board (3) which supports conductive tracks (20), - electronic components and character screen printing (8).

Description

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  Simplified instrument panel A dashboard, like that of a motor vehicle, also called a combined instrument, may include, inter alia, a front side, indicator movements, such as speedometer, tachometer, odometer and other gauges. attached to the rear of the front face, a silkscreen mask, attached to the front of the front face and representing, at the right of openings in the front face, symbols (witnesses) and other characters of indication, lighting sources arranged in light boxes and intended to illuminate symbols and characters in circumstances determined to attract the attention of the driver, often a flexible connection or power supply circuit and, at the rear, a printed circuit board, with conductive tracks, electrical and electronic components, lamps and connectors for connection to the flexible circuit and to a vehicle interface, all of which is dressed in a room called, in the language of the trade, flush and protected, at the front, by a window

  transparent mounted on the flange and, at the rear, by a hood.

  The printed circuit thus ensures, on the one hand, the supply of the lighting sources, the power supply of the motion motors and the connection with the flexible circuit and the interface and, on the other hand, other electronic functions. so-called noble and protected against electromagnetic waves, such as calculation functions, motor control and other LEDs. For reasons of standardization, more and more often, we break the circuit board into a small card, called card heart, ensuring the noble functions, and another support for other power functions

and connection.

  The silkscreen mask is often made on a flexible film in

  polycarbonate, usually of the Lexan protected brand.

  The flexible circuit is often made of a flexible polyester film. In short, a vehicle dashboard today has many elements and supports, or substrates in the etymological sense of the term. Too, and the plaintiff sought to reduce its

s number.

  For this purpose, the present invention relates to a simplified dashboard, in particular for a motor vehicle, comprising at least - indicator means, - screen printing medium means of indication characters, - means for illuminating the indication characters, - Conductive tracks support means and electronic components, dashboard characterized in that it comprises a common substrate for conductive tracks, on the one hand, and for

  serigraphy indication characters, on the other hand.

  The invention thus made it possible to dispense with the conventional screen printing medium. This is the printed circuit board that is directly screen printed. Preferably, the indication characters are silkscreened on one side of the substrate, the other side of the substrate carrying the tracks

conductive.

  Still preferably, the illumination means of the indication characters of the common substrate are in front of the common substrate. Advantageously, there is provided a dressing flange forming with the common substrate a light chamber for the means

  illumination of the indication characters of the common substrate.

  The invention will be better understood with the aid of the following description

  of the preferred embodiment of the dashboard, with reference to the single figure in the appendix which is a cross-sectional view. The dashboard which will now be described here is that of a motor vehicle. It comprises, from the front to the rear, a protective front window 1, a casing flange 2, a dual function circuit board 3, an indicator motor 4

and other components.

  The printed circuit board 3 is attached to the rear of a central area

  6 of the flange through which is cleared an indication window 7.

  The card 3, in the area of the window 7, on the side facing forward, supports a screen printing layer 8 to display indicia characters, especially the scales of the dial associated with

  the indicator hand 9 of the movement 4.

  The side skirt of the flange, in its upper part 10 and in front of the card 3, comprises a recess 11 for receiving a light source 12, for the illumination from the front of the screen printing 8 and the needle 9, here not luminous, the flange skirt 10 and the printed circuit board 3 forming an enclosure, or box, with a light 13 for

the source 12.

  The motor 4 is fixed at the rear of the card 3, just like a connector 14, a core box 15 of electronic components for the noble functions of the dashboard and, here, a LED 16 for lighting a screen printing of symbols 17 supported on the printed circuit board 3, the side facing forward, next to the LED 16. The card 3 thus also forms a substrate for a track circuit

  conductive 20 printed on the side facing back.

  The window 1 is simply clipped onto the flange skirt 10.

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  The supply of the source 12, here a set of SMT lamps, or LEDs, is effected by means of a flexible flexible circuit 5, fixed to the skirt 10 of the flange 2 and pinched on the card 3 in the zone 19 from the edge of the

central range 6 of the flange 2.

Claims (4)

  1. Simplified dashboard, especially for a motor vehicle, comprising at least - indicator means (4, 9), - means (3) silkscreen characters indicative (8), - means (12) of illumination of the indication characters (8), - means (3) supporting conductive tracks (20) and electronic components (4, 14-16), characterized in that it comprises a common substrate ( 3) for conducting tracks (20), on the one hand, and for   serigraphy indicating characters (8), on the other hand.   2. Simplified dashboard according to claim 1, wherein the indication characters (8) are silkscreened on one side of the substrate (3), the other side of the substrate (3) carrying the tracks. conductive (20).   3. Simplified instrument panel according to one of claims 1 and 2,   in which the means (12) for illuminating the indication characters   (8) of the common substrate (3) are in front of the common substrate (3).   4. Simplified dashboard according to one of claims 1 to 3,   in which there is provided a covering flange (2) forming with the common substrate (3) a light chamber (13) for the means (12) for illuminating the indicating characters (8) of the common substrate (3). ).