• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A control panel (10) for a motor vehicle comprises a front panel (12) having a control area (14); a printed circuit board (20); at least one capacitive sensing element (24) electrically conductive and extending along a vertical axis (V) from the rear face of the front face (12) to an electrical contact area (32) of the circuit board printed (20); a light source (22) mounted on the printed circuit board (20) and adapted to produce a backlight light beam (23) to the control area (14) through the capacitive sensing element; the capacitive sensing element (24) also comprises at least one rigid tubular part (52) forming a light guide for the light beam (23) and at least one elastic part (54) made in one piece with the part rigid tube (52) so as to compensate for clearances between the rear face and the sensing element (24) and between the printed circuit board (20) and the sensing element (24).
    公开号:FR3055258A1
    申请号:FR1658013
    申请日:2016-08-29
    公开日:2018-03-02
    发明作者:Artur Boron；Przemyslaw Madon；Janusz Lipka；Sebastian Melfried；Halina Niemiec；Grzegorz Szostek
    申请人:Delphi Technologies Inc；
    IPC主号:
    专利说明:

    TECHNICAL AREA
    The present invention relates to an automobile control panel and more particularly to a backlit control panel equipped with capacitive buttons.
    TECHNOLOGICAL BACKGROUND OF THE INVENTION
    Control devices or control panel with capacitive buttons are known in the prior art. Such devices generally include a transparent front face painted on its rear face and having a plurality of functional pictograms indicating specific areas of controls. A capacitive film is affixed against the rear face of the front panel so that the control zones form capacitive control buttons. An electronic printed circuit board is electrically connected to the capacitive film and includes means for controlling the capacitive film. To ensure the backlighting of the pictograms, light-emitting diodes are arranged on the printed circuit board. Generally a spacer is interposed between the capacitive film and the printed circuit electronic card, in which are arranged rectangular openings arranged facing the pictograms. Uprights extend towards the rear from the periphery of these openings, with their free ends which rest against the electronic card by surrounding each of the light-emitting diodes. These uprights make it possible to compartmentalize the light flux produced by the diodes and to avoid the dispersion of light throughout the control panel.
    This type of capacitive button control device requires a complex assembly of different parts of different technologies, in particular the assembly of plastic parts such as the front panel, with a capacitive film. The capacitive film also represents a constraint for the backlight, in particular by its light propagation properties.
    It is therefore important to offer a new solution to these problems.
    SUMMARY OF THE INVENTION
    According to the invention, a control panel for a motor vehicle comprises a front panel comprising a control zone, a printed circuit board, at least one electrically conductive capacitive detection element and extending along a vertical axis from the rear face of the panel. frontal to an electrical contact area of the printed circuit board, a light source mounted on the printed circuit board and capable of producing a light beam of backlight towards the control area through the capacitive detection element . The capacitive detection element comprises at least one rigid tubular part forming a light guide for the light beam and at least one elastic part produced in one piece with the rigid tubular part so as to compensate for the play between the rear face and the sensing element and between the printed circuit board and the sensing element.
    Preferably, the rigid tubular part may be an electrically conductive plastic. The capacitive sensing element may include an elastic part arranged in abutment with the electrical contact area of the printed circuit board. The capacitive sensing element may include an elastic part arranged to bear in direct contact with the rear face of the front panel.
    According to a preferred embodiment, the detection element may comprise a single elastic part arranged between the axial ends of the detection element so that the tubular part is divided into first and second portions on the side and d 'other of the elastic part, the first and the second portions being respectively in contact in abutment with the rear face of the front panel and in abutment with the electrical contact area of the printed circuit board. The elastic part may be a conductive elastomer collar overmolded with the rigid tubular part.
    According to another embodiment, the elastic part can comprise an elastic form formed integrally with the tubular part. The elastic form may comprise at least one leaf spring in the form of a 'V', the point of the 'V' of which is oriented towards the inside of the cavity of the detection element, the leaf spring being arranged between the ends of the sensing element so that the tubular part is divided into first and second portions on either side of the leaf spring, the first and the second portions being respectively in contact in abutment with the rear face of the front panel and in contact with the electrical contact area of the printed circuit board. The elastic shape may have a shape in Ύ 'turned over, the part in' V 'turned over ensuring contact with the electrical contact area of the printed circuit board, the vertical part of Ύ' turned over ensuring the connection between the tubular part and the elastic part.
    The capacitive sensing element can extend in an oblique direction to the vertical axis from the rear face of the front panel to the electrical contact area of the printed circuit board.
    BRIEF DESCRIPTION OF THE DRAWINGS
    Other characteristics, objects and advantages of the invention will appear on reading the detailed description which follows, and with reference to the appended drawings, given by way of non-limiting example and in which:
    Figure 1 is a perspective view of a control panel for a motor vehicle according to the invention comprising a first embodiment of the capacitive detection elements
    FIG. 2 is a schematic view in axial section along plane 2-2 of the control panel in FIG. 1.
    Figure 3 is a perspective view which shows a capacitive sensing element according to a second embodiment.
    Figure 4 is a perspective view which shows a capacitive sensing element according to a third embodiment.
    FIG. 5 is a partial perspective view of the elastic part of the detection element of FIG. 4, seen from the inside of the cavity.
    Figure 6 is a perspective view which shows a capacitive sensing element according to a fourth embodiment.
    DESCRIPTION OF THE PREFERRED EMBODIMENTS
    According to Figure 1 and Figure 2, a control panel 10 for a motor vehicle has a front panel 12 having pictograms 16. The term front panel 12 means the front panel of the control panel 10 accessible to a user. Capacitive detection elements are provided to be arranged against the rear face 40 of the front panel 12. Preferably, the front panel 12 is a single element covering the capacitive detection elements 24. Alternatively, the front panel 12 can be made of 'a plurality of elements each covering one or more capacitive detection elements 24. The control panel 10 also includes a printed circuit board 20 on which are arranged light sources 22 such as light emitting diodes. The diodes, the capacitive detection elements 24 and the pictograms 16 are aligned along a vertical axis V so that the light sources 22 can produce a light beam 23 which can backlight the pictograms 16 through the capacitive detection elements 24. The card with a printed circuit 20 comprises electrical contact zones 32 designed to be in electrical contact with the capacitive detection elements 24.
    The pictograms 16 indicate control zones 14 on which a user can press in order to trigger a vehicle function. The pictograms 16 can be produced by laser engravings on the front panel 12.
    According to a first embodiment, each capacitive detection element 24 is of tubular shape. Each capacitive detection element 24 has a cross-section of rectangular shape. Variants of the capacitive sensing element 24 having a cross-section of circular shape or ellipsoidal shape can be envisaged. Each capacitive detection element 24 extends along the vertical axis V from the rear face 40 of the front panel 12 to the electrical contact area 32 of the printed circuit board 20. Each detection element 24 comprises a first axial end 26 in direct contact with the rear face 40 of the front panel 12 and a second axial end 28 in contact with an electrical contact area 32 of the printed circuit board 20.
    Each first end 26 has a rim 30, the surface 31 of which is entirely in direct contact with the rear face 40 of the front panel 12. The surface 40 of the rim 30 of each first end 26 is inclined relative to the surface 21 of the card with a printed circuit 20 so as to be essentially parallel to the rear face 40 of the front face 12 inclined with respect to the printed circuit board 20 and therefore able to come to bear entirely on the rear face 40 of the front face 12. When the front face 12 of the control panel 10 is parallel to the printed circuit board 20, the surface 31 of the flange 30 of each first end 26 is essentially parallel to the printed circuit board 20. The flange 30 of each first end 26 surrounds each control area 14.
    Optionally, the capacitive detection elements 24 can extend in a direction oblique to the vertical axis V from the rear face 40 of the front panel 12 to the electrical contact area 32 of the printed circuit board 20, so as to be able to adapt to an arrangement for which the light sources 22 are not vertically aligned with the control zones 14.
    According to the embodiment represented by FIGS. 1 and 2, each capacitive detection element comprises a rigid tubular part 52 and also two elastic electrically conductive parts 54, 56.
    Each rigid tubular part 52 has a cross-section of rectangular shape. Variants of rigid tubular part 52 having a cross-section of circular shape or ellipsoidal shape can be envisaged. Each rigid tubular part 52 has a cavity 58 forming a light guide for the light source 22. The internal walls 60, 62 of the cavity 58 reflect the light and do not allow the light to scatter outside the cavity 58. Each rigid tubular part 52 is an electrically conductive plastic part. Preferably, these are parts formed from plastic loaded with metallic particles such as, for example, powder or flakes of aluminum, copper or zinc.
    Each elastic portion 54, 56 electrically conductive is in the form of a collar arranged at each axial end 26, 28 of the tubular portion 52 so as to compensate for the play between the rear face 40 and the detection element 24 and between the circuit board printed 20 and the detection element 24. In other words, one of the two elastic parts 54 is arranged in direct contact in abutment with the rear face 40 of the front face 12; this elastic part 54 being the first end 26 of the capacitive detection element 24. The other elastic part 56 is arranged in direct contact in abutment with the electrical contact zone 32 of the printed circuit board 20; this elastic part 56 being the second end 28 of the detection element 24. Each electrically conductive elastic element
    54, 56 eliminates play due to assembly or thermal expansion of the control panel 10, more particularly the tolerance of the distance separating the capacitive sensing element 24 with the printed circuit board 20 and also of the distance separating the capacitive detection element 24 with the rear face 40 of the front face 12. This solution therefore makes it possible to guarantee electrical contact between the capacitive detection element 24 and the printed circuit board 20, and also between the capacitive detection element 24 and the rear face 40 of the front face 12. Each elastic part 54, 56 of each detection element 24, makes it possible to maintain the latter in compression against the printed circuit board 20 and against the rear face 40 of the front panel 12.
    The two elastic parts 54, 56 are made in one piece with the rigid tubular part 52. Each of the elastic parts 54, 56 is formed by a collar of electrically conductive elastomer and more particularly of rubber.
    Each of the two elastic parts 54, 56 can preferably be overmolded with the rigid tubular part 52, or glued. Overmolding eliminates the need for a bonding step, since the adhesive can reduce the sensitivity of the capacitive detection.
    Although this is not essential to the invention, the control panel 10 of FIG. 1 also includes a housing 34. This housing 34 is provided for closing the control panel 10. The housing 34 includes a peripheral edge 36 provided for surround the printed circuit board 20 and extending vertically up to the front panel 12 so that the front panel 12 can close the housing 34. The housing 34 also includes opaque walls 41 arranged on the printed circuit board 20 and arranged between the light sources 22 so as to block any dispersion of light from one light source 22 to another and also which can serve to maintain the capacitive detection elements 24.
    Figures 3, 4 and 6 show other non-limiting examples of capacitive sensing elements 60, 70, 80 according to the invention.
    According to a second embodiment, the general geometric shape of the capacitive detection element 60 shown in FIG. 3 differs from that of FIG. 1 in that it only comprises a single elastic part 62 formed by a collar in electrically conductive rubber. This collar is placed between the first 64 and the second 65 end of the capacitive detection element 60, thus separating the rigid tubular part into a first 66 and a second 67 portions on either side of the elastic part 62, the the first 66 and the second 67 portions being respectively designed to be in contact in abutment with the rear face 40 of the front panel 12 and in abutment with the electrical contact zone 32 of the printed circuit board 20.
    According to a third embodiment, the elastic part 72 of the capacitive detection element 70 shown in FIG. 4 is located on the detection element 70 in a similar manner to that of FIG. 3. However, unlike FIG. 3 , the elastic part 72 came integrally with the first 76 and the second 77 portions of the rigid tubular part, that is to say preferably of rigid electrically conductive plastic. The elastic property of this elastic part 72 made of rigid plastic is obtained by the particular shape thereof. According to the embodiment shown in Figures 4 and 5, the elastic part 72 is formed by four leaf springs (3 springs shown in Figure 5) 90, 92, 94 in the form of 'V' each connecting the first 76 and the second 77 portions of the four walls of the capacitive sensing element 24, each point of the 'V' 96, 97, 98 of each of the springs 90, 92, 94 being oriented towards the interior of the cavity 78 of the detection element 70.
    More generally, the first 76 and the second 77 portions of the rigid tubular part can be connected by one or more leaf springs integrally formed with the rigid tubular part.
    According to a fourth embodiment, and in the same way as for FIG. 4, the elastic part 82 of the capacitive detection element 80 represented in FIG. 6 came integrally with the rigid tubular part 84. However, the figure 6 differs from FIG. 4 in that the elastic element 82 is arranged at the end of the detection element 80 intended to be in contact with an electrical contact zone 32 of the printed circuit board 20. In d In other words, this elastic part 82 made integrally with the tubular part 84 is designed to be kept in compression support on an electrical contact area 32 of the printed circuit board 20. The elastic part 82 is formed of two elastic elements 85, 86 vis-à-vis arranged in continuity with respectively two walls opposite the rigid tubular part 84. Each element 85, 86 has an inverted Ύ shape, each part in 'V returned 87, 88 for contacting the electrical contact area 32 of the printed circuit board 20, each vertical portion 81, 83 of Ύ 'returned providing the connection between the tubular portion 84 and each elastic member 85, 86.
    More generally, the rigid tubular part 84 can be electrically connected to an electrical contact zone 32 of the printed circuit board 20 by one or more leaf springs or elastic tabs 85, 86 made integrally with the rigid tubular part 84 .
    The invention is not limited to the examples of detection elements shown, but may extend to detection elements for which the tubular part may have a cross-sectional section of circular shape or of other shapes. The elastic shape of the elastic parts made of material with the rigid tubular part can also be different from those shown; the essential function of this elastic part is to ensure that the detection element is held in compression by pressing against the printed circuit board and against the rear face of the front panel of the control panel. The number of elastic parts can also be greater than two if the take-up of assembly play between the detection elements and the control panel requires it.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    CLAIMS:
    1. Control panel (10) for a motor vehicle comprising: a front panel (12) comprising a control zone (14); a printed circuit board (20);
    at least one capacitive detection element (24) electrically conductive and extending along a vertical axis (V) from the rear face (40) of the front panel (12) to an electrical contact area (32) of the printed circuit board (20);
    a light source (22) mounted on the printed circuit board (20) and capable of producing a light beam (23) of backlight towards the control area (14) through the capacitive detection element;
    characterized in that the capacitive sensing element (24) comprises at least one rigid tubular part (52) forming a light guide for the light beam (23) and at least one elastic part (54) made in one piece with the rigid tubular part (52) so as to compensate for the play between the rear face (40) and the detection element (24) and between the printed circuit board (20) and the detection element (24).
    [2" id="c-fr-0002]
    2. Control panel (10) according to claim 1 characterized in that the rigid tubular part (52) is an electrically conductive plastic.
    [3" id="c-fr-0003]
    3. Control panel (10) according to any one of the preceding claims, characterized in that the detection element (24) comprises an elastic part arranged (56) bearing against the electrical contact area (32) of the card with printed circuit (20).
    [4" id="c-fr-0004]
    4. Control panel (10) according to any one of the preceding claims, characterized in that the detection element (24) comprises an elastic part (54) arranged to bear in direct contact with the rear face (40) of the front panel (12).
    ίο
    [5" id="c-fr-0005]
    5. Control panel (10) according to any one of claims 1 to 2 characterized in that the detection element (60) comprises a single elastic part (62) arranged between the axial ends (64, 65) of the 'sensing element (60) so that the tubular part is divided into a first (66) and a second (67) portions on either side of the elastic part (62), the first (66) and the second (67) portions being respectively in contact in abutment with the rear face (40) of the front panel (12) and in abutment with the electrical contact area (32) of the printed circuit board (20).
    [6" id="c-fr-0006]
    6. Control panel (10) according to any one of the preceding claims, characterized in that the elastic part (54, 56, 62) is a conductive elastomer collar molded with the rigid tubular part (52, 66, 67).
    [7" id="c-fr-0007]
    7. Control panel (10) according to any one of claims 1 to 2 characterized in that the elastic part (72) comprises an elastic form formed integrally with the tubular part (76, 77).
    [8" id="c-fr-0008]
    8. Control panel (10) according to claim 7 characterized in that the elastic shape (72) comprises at least one leaf spring (90) in the shape of a 'V' whose tip of the 'V' (96) is oriented towards the inside of the cavity (78) of the detection element (70), the leaf spring (90) being arranged between the ends (74, 75) of the detection element (70) so that that the tubular part is divided into a first (76) and a second (77) portions on either side of the leaf spring (90), the first (76) and the second (77) portions being respectively in contact in support with the rear face (40) of the front panel (12) and support with the electrical contact area (32) of the printed circuit board (20).
    [9" id="c-fr-0009]
    9. Control panel (10) according to claim 7 characterized in that the elastic shape (85, 86) has an inverted Ύ shape, the inverted 'V' part (87, 88) ensuring contact with the area of electrical contact (32) of the printed circuit board (20), the vertical part of the inverted ((81, 83) ensuring the connection between the tubular part (84) and the elastic part (85, 86).
    [10" id="c-fr-0010]
    10. Control panel (10) according to any one of the preceding claims, characterized in that the capacitive detection element (54) extends in a direction oblique to the vertical axis (V) from the rear face (40 ) from the front panel (12) to the electrical contact area (32) of the circuit board
    5 printed (20).
    12 1/3
    2/3> - * - (N
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    同族专利:
    公开号 | 公开日
    CN107800420B|2021-03-12|
    CN107800420A|2018-03-13|
    FR3055258B1|2018-08-17|
    US20180056788A1|2018-03-01|
    US10556508B2|2020-02-11|
    EP3290253B1|2019-05-01|
    EP3290253A1|2018-03-07|
    引用文献:
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    法律状态:
    2017-08-25| PLFP| Fee payment|Year of fee payment: 2 |
    2018-03-02| PLSC| Publication of the preliminary search report|Effective date: 20180302 |
    2018-08-27| PLFP| Fee payment|Year of fee payment: 3 |
    2019-08-26| PLFP| Fee payment|Year of fee payment: 4 |
    2020-08-27| PLFP| Fee payment|Year of fee payment: 5 |
    2021-08-31| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1658013|2016-08-29|
    FR1658013A|FR3055258B1|2016-08-29|2016-08-29|CONTROL PANEL FOR MOTOR VEHICLE|FR1658013A| FR3055258B1|2016-08-29|2016-08-29|CONTROL PANEL FOR MOTOR VEHICLE|
    EP17187000.9A| EP3290253B1|2016-08-29|2017-08-21|Control panel for a motor vehicle|
    CN201710738933.4A| CN107800420B|2016-08-29|2017-08-25|Control panel of motor vehicle|
    US15/689,032| US10556508B2|2016-08-29|2017-08-29|Illuminated control panel capacitive sensor having rigid and flexible portions|
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