• 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:
    Longitudinal structural member (30a) for a windscreen wiper blade (10 '), in particular a motor vehicle, said structural member having a non-metallic main body, characterized in that said main body comprises at least a portion ( 39) made of a thermally conductive material or covered with a layer of non-metallic thermally conductive material.
    公开号:FR3018248A1
    申请号:FR1451844
    申请日:2014-03-07
    公开日:2015-09-11
    发明作者:Lionel Cros；Vincent Izabel；Gerald Caillot；Jean-Michel Jarasson
    申请人:Valeo Systemes dEssuyage SAS；
    IPC主号:
    专利说明:

    [0001] The present invention relates in particular to a longitudinal structure element for a windscreen wiper blade, in particular a motor vehicle blade. STATE OF THE ART Typically, a wiper blade of a window such as the windshield of a motor vehicle comprises a first longitudinal cover member carrying an aerodynamic deflector, and a second longitudinal support member of a wiper blade, usually made of rubber, intended to rub against the window of the vehicle to evacuate water by bringing it out of the driver's field of vision. The second member also serves to support a longitudinal vertebra which stiffens the wiper blade, so as to promote the application of this blade on the windshield. The broom is carried by an arm which is driven by a motor in an angular back and forth motion. The linkage means of the brush to the arm generally comprise a connector which is integral with the brush and an adapter which is articulated on the connector and fixed to one end of the arm.
    [0002] The second member or support member defines a first longitudinal housing for receiving the stiffening vertebra and a second longitudinal housing for receiving a heel of the wiper blade. Each of these housing is delimited by a bottom wall, generally horizontal (in the service position), and two side walls, generally vertical, connected to said bottom wall. At rest, the stiffening vertebra has a concave curved lower face and a convexly curved upper face. The vertebra is mounted in the first housing of the support member so that its concave face is located on the side of the windshield of the vehicle.
    [0003] Heaters for wiper blades are known having a heating element integrated in the wiper blade and extending generally along the length thereof. The heating element melts ice or snow that may form or clump on the wiper blade. Such a heating element is particularly useful for equipping a wiper blade provided with a windshield washer fluid delivery ramp. In this case, the heating element makes it possible to heat the distribution ramp, and in particular the distribution holes, to allow the liquid to come out and wash the windshield of the vehicle. When the heating element is in the form of a heating film or a heating coating, this heating element may be disposed by gluing or other adhesion means on the concave lower surface of the vertebra. In the present art, the wiper blade support member is made of a non-heat-conducting plastic material. It is made, for example, of polypropylene (PP), the thermal conductivity of which is clearly less than 1 mW. K1 (at 20 ° C). To improve the heating of the brush, one solution is to increase the thermal power of the heating film. However, this solution is unsatisfactory because it may degrade the material of the support member which is not adapted to withstand high temperatures, especially when the heating film is directly in contact with the substrate. aforesaid bottom wall of the support member. The invention proposes a simple, effective and economical solution to this problem. SUMMARY OF THE INVENTION The invention proposes a longitudinal structural element for a wiper blade, in particular a motor vehicle, said structural element comprising a non-metallic main body, characterized in that said main body comprises minus a portion made of a thermally conductive material, preferably non-metallic, or covered with a layer of non-metallic thermally conductive material.
    [0004] The invention can be applied to any longitudinal structural element of a wiper blade, such as for example its support member or its cover member. The invention is however not applicable to a stiffening vertebra whose main body or core is metallic. According to the invention, although the main body of the structural element is made of a non-metallic material, it is made at least in part of heat-conducting material or it is covered at least in part by a layer of non-conductive thermally conductive material. -metal (which, she, can be metallic). In what follows, a thermally conductive material is understood as a non-metallic thermoconductive material, which may be non-resistive (not intended to produce thermal energy when it is supplied with electrical energy). In the present application, the term thermally conductive material, a material capable of transmitting thermal energy. Preferably, the thermally conductive material has a thermal conductivity greater than or equal to 1 W.m-1.K1, preferably greater than or equal to 5 K and more preferably greater than or equal to 10 W.m-1.K1 (at 20 ° C).
    [0005] The thermally conductive material may comprise thermally conductive fillers (such as graphite, carbon fibers, ceramic fillers, etc.). These fillers may be embedded in a binder (for example a homopolymer or copolymer based on polypropylene or polyethylene).
    [0006] Structural element means an element rigid enough to participate in the structure itself and for example in the holding of a wiper blade. The structural elements of a wiper blade generally comprise the cover and support members, the deflector when it is independent of the support member and attached to the latter, and the stiffening vertebra.
    [0007] The main body of such a structural element is understood as the essential part of this element. In the case of a vertebra, its main body is its soul. In the case of a support member, it is the support member as such, and in the case of a cover member, it is the cover member as such. In the case where one of these members carries a particular element, such as a heating element, this particular element may not be considered as part of the main body of the organ. According to one embodiment of the invention, the main body of the structural element comprises a longitudinal housing for receiving a longitudinal stiffening vertebra, said housing being delimited at least in part by a bottom wall and two side walls. connected to said bottom wall, at least a portion of said bottom wall being made of said thermally conductive material or covered with said layer of a non-metallic heat-conductive material. The main body of the structural element may further comprise a longitudinal housing for receiving a bead of a wiper blade. The main body may further comprise at least one longitudinal fluid passage channel and / or an aerodynamic deflector. In the case where the main body comprises one or more fluid passage channels such as windshield washer fluid, the invention facilitates its or defrosting especially in winter. The present invention also relates to an assembly comprising a structural element as described above and a heating element, such as a heating film, said heating element being configured to heat said at least one part or said layer. The assembly may further comprise a longitudinal stiffening vertebra, said vertebra being mounted in said housing of the body and comprising, at rest, a concave curved lower face, said heating element being interposed between said lower face of the vertebra and said wall of the body. bottom of the body. The heating element is preferably attached to said lower face of the vertebra and is either spaced from or in contact with said bottom wall. Alternatively, the heating element is fixed on said bottom wall. The main body can be made in its entirety thermally conductive material. Alternatively, the main body can be made, preferably by coextrusion, from two materials including said thermally conductive material. The present invention further relates to a wiper blade, particularly a motor vehicle, comprising a structural element as described above or an assembly as described above. The present invention finally relates to a method of manufacturing a structural element as described above, characterized in that it comprises: a step of extruding its main body from a thermally conductive material, or a step of co-extruding its main body from a thermally conductive material and another non-heat-conducting material, or a step of extruding its main body from a non-heat-conducting material, then a step of depositing a layer of non-resistive thermoconductive material on a portion of said body. DESCRIPTION OF THE FIGURES The invention will be better understood and other details, characteristics and advantages of the invention will become apparent on reading the following description given by way of nonlimiting example with reference to the appended drawings, in which: 1 schematically represents a perspective view of a wiper blade 30 connected to a wiper arm; FIG. 2 schematically represents a sectional view of an embodiment of the wiper blade according to FIG. the invention, and - Figures 3 to 12 schematically show sectional views of alternative embodiments of the wiper blade according to the invention.
    [0008] DETAILED DESCRIPTION It should be noted that the figures disclose the invention in detail to implement the invention, said figures can of course be used to better define the invention where appropriate. In the following description, the longitudinal or lateral names refer to the orientation of the wiper blade according to the invention. The longitudinal direction corresponds to the main axis of the blade in which it extends, while the lateral orientations correspond to intersecting straight lines, that is to say which intersect the longitudinal direction, in particular perpendicular to the longitudinal axis of the blade. broom in his plane of rotation.
    [0009] For the longitudinal directions, the outer or inner names are assessed relative to the point of attachment of the blade on a brush arm, the inner denomination corresponding to the part where the arm and a half-brush extend. Finally, the directions referenced as upper or lower correspond to orientations perpendicular to the plane of rotation of the wiper blade, the lower denomination containing the plane of the windshield. With reference to FIGS. 1 to 12, identical or functionally equivalent elements are identified by identical reference numerals.
    [0010] FIG. 1 shows a windscreen wiper, in particular a motor vehicle windshield, this wiper comprising a wiper blade 10 and a wiper arm 12 which is partially shown and intended to be driven by a motor to follow a back-and-forth angular movement to evacuate the water and possibly other undesirable elements covering the windshield.
    [0011] The blade 10 here comprises a longitudinal cover member 14, a longitudinal scraper blade 16, generally of rubber, and at least one longitudinal vertebra 18 which gives the blade 16 stiffening so as to promote the application of this blade to the blade. windshield.
    [0012] The covering member 14 of the blade 10 comprises an upper aerodynamic deflector 20 intended to improve the operation of the wiper, the purpose of this deflector 20 being to improve the plating of the blade on the windshield and therefore the performance aerodynamic system. The blade 10 further comprises hooks or hooking clips 22 of the blade 16 and the vertebra 18 on the cover member 14, these clips 22 being located at each of the longitudinal ends of the cover member 14. L Cover member 14 of the brush is here made in two independent parts which are arranged substantially end to end and separated from one another by an intermediate connector 24. This connector 24 is thus interposed between the two parts of the cover member 14 and may comprise means for fluidically connecting the washer fluid supply means of the connector 24 to the conduits of the member 14.
    [0013] To ensure its mounting on the arm 12, the blade 10 comprises an adapter 26 mounted on the connector 24 and allowing an articulation of the blade 10 relative to the arm 12. The articulation of the blade 10 relative to the arm 12 is a hinge according to a rotational movement about an axis of rotation Y perpendicular to the longitudinal axis of the blade 10. The blade 10 must in fact have at least one degree of freedom in rotation relative to the arm 12, and more specifically with respect to a part terminal 28 of the arm 12, to allow the blade 10 to follow the curvature of the windshield. FIG. 2 shows an embodiment of the wiper blade 10 'according to the invention, this wiper 10' comprising, in addition to the features described above with reference to FIG. 1, a longitudinal support member 30a. of the blade 16 and the vertebra 18. The support member 30a comprises two lateral longitudinal hooks 46. These hooks 46 are substantially coplanar, each hook 46 extending laterally from the opposite side to the other hook. The hook 46 located at the front of the blade 10 'thus extends forwardly and the hook 46 located at the rear of the blade extends rearwardly. Each hook 46 comprises at its free end a longitudinal tooth 48 hooking. The cover member 14 may comprise a longitudinal channel 45 for windscreen washer fluid, which is connected to appropriate distribution means, for example at the level of connector 24. The cover member 14 of the wiper further comprises at its lower end hooking means on the support member 30a. In the example shown, the cover member 14 comprises two lateral longitudinal hooks 50 which are intended to cooperate with the hooks 46 of the support member 30a. The hooks 50 are substantially coplanar and extend towards each other to define between them a slot in which can slide and is mounted the support member 30a. The hook 50 located at the front of the blade 20 thus extends rearwardly and the hook 46 located at the front of the blade extends forward. Each hook 50 comprises at its free end a longitudinal attachment tooth 52 intended to cooperate with the tooth 48 of the corresponding flange 46 of the support member 30a to limit the risk of accidental detachment of the cover member 14 screw-to -vis 25 of the support member 30a. The support member 30a of the blade 10 also comprises a first housing or lower housing 32 for receiving a longitudinal bead 34 of the blade 16. The blade 16 is for example fir type, well known to those skilled in the art. Its upper end is connected by a hinge 36 and a damping member 38 to the heel 34. In known manner, in operation, the blade 16 can abut on the member 38 which dampens its reversal to the front or to the rear. The housing 32 is configured to receive by longitudinal sliding the heel 34 of the blade 16. This housing 32 is defined by a longitudinal bottom wall 39 and two side walls 40. The upper ends of the side walls 40 are connected to the wall of the bottom 39 and their lower ends are each connected to a longitudinal flange 41. These flanges 41 are substantially coplanar and extend towards one another. They delimit between them a slot in which can slide and is mounted a lower portion of the heel portion 34, which has a substantially T-shaped section. The support member 30a comprises a second housing or upper housing 42 for receiving the vertebra. 18, which thus extends above the heel 34 of the blade.
    [0014] The housing 42 is configured to receive by longitudinal sliding the vertebra 18. This housing 42 is delimited by the aforesaid bottom wall 39 and by two side walls 43. The lower ends of the side walls 43 are connected to the bottom wall 39 and their upper ends are each connected to a longitudinal flange 44. These flanges 44 are substantially coplanar and extend towards one another. The support member 30a comprises, in the housing 42, an upper longitudinal shoulder 47 along each lateral longitudinal edge of the bottom wall 39. The vertebra 18 has a curved shape at rest and comprises a convex curved upper face and a concave curved lower face. As is also visible in the drawing, in the mounting position of the vertebra 18 in its housing 42 (in which the vertebra 18 is resting on the shoulders 47), the lower face of the vertebra 18 is located opposite the wall bottom 39 and away from it.
    [0015] A heating element 49, such as a heating film, is fixed on the lower face of the vertebra 18 and extends away from the bottom wall 39. This heating element 49 is made of resistive material and is supplied with electricity by the The spacing of the heating element 49 from the bottom wall 39 prevents its thermal degradation when the heating is activated. The support member (and in particular its bottom wall 39) is made of polypropylene (PP) in the prior art, which is a poor thermal conductor material. To increase the heat energy transmitted to the brush, it is therefore necessary to increase the thermal power of the heating film, which is particularly not economical. The invention overcomes this problem through the use of a thermally conductive material, for example for the realization of the support member 30a, as shown in Figure 2. In the example shown, parts of the support member 30a, namely the bottom wall 39 and the shoulders 47, are made of thermally conductive material while the rest of the support member 30a is made of non-heat-conducting material, such as PP for example. This support member 30a can be made by coextrusion from both materials. Figures 3 to 7 show alternative embodiments of the invention. The foregoing description relating to the blade 10 'of FIG. 2 applies to the blade 10' of FIGS. 3 to 7 so long as it does not contradict the following. In the embodiment shown in Figure 3, it is the support member 30b in its entirety, which is made of thermally conductive material. This support member 30b may be made by extrusion from the thermally conductive material. In the embodiment shown in FIG. 4, the upper face of the bottom wall 39 of the support member 30c is covered with a layer 60 of thermally conductive material which may be in contact with the heating element 49 or distance from it.
    [0016] The embodiment shown in FIG. 5 differs from that of FIG. 3 essentially in that the support member 30d does not comprise a shoulder and that the heating element 49 is in contact with the bottom wall 39. support member 30d is entirely made of thermally conductive material, for example by extrusion. In the embodiments shown in Figures 6 and 7, the heating element 49 is not attached to the vertebra 18, but on the cover member 14a, 14b of the brush 10 '. The heating element 49 may be in the form of a heating film. It can be fixed on a wall 62 of the cover member 14a, 14b which, in the mounting position, is substantially parallel to the vertebra 18 and substantially facing it. In the case of the cover member 14a of Figure 6, a layer 60 of heat-conducting material is interposed between the heating element 49 and the wall 62 of the cover member 14a which is made of a non-heat-conductive material. In the case of the cover member 14b of FIG. 7, this cover member is made entirely of a thermally conductive material, for example by extrusion. Figures 8 to 12 show other variants according to the invention. In FIG. 8, the cover element 14c is entirely made of a thermally conductive material, for example by extrusion. The heating element (film) 49 is here located on the upper convex face of the vertebra 18 of the blade 10 '. The cover element 14c here is devoid of windshield washer fluid passage channel. The cover element 14d of FIG. 9 differs from that of FIG. 8 in that it comprises a longitudinal channel 45 for windshield washer fluid passage. The cover element 14d is entirely made of a thermally conductive material, for example by extrusion. The cover element 14e of FIG. 10 differs from that of FIG. 9 in that only the part of the cover element comprising the longitudinal channel 45 is made of a thermally conductive material. The remainder of the cover element 14e is made of a non-heat-conducting material. This 14th bi-material cover element can be produced by coextrusion. The channel 45 is circular in cross section and is entirely surrounded, over 360 °, of the thermally conductive material. The cover element 14f of FIG. 11 differs from that of FIG. 10 in that the channel channel 45 is partly surrounded, over about 90-100 °, by thermally conductive material, and partly surrounded, over about 260-270.degree. of non-thermally conductive material. The heat conductive material is disposed substantially between the channel 45 and the heating element (film) 49 so that the heat generated by the heating element is efficiently transmitted to the channel 45. The cover member 14g of FIG. of that of Figure 10 in that it comprises two longitudinal channels 45 namely one on each side of the brush 10 '. As in FIG. 10, only the parts of the covering element 14g comprising the channels 45 are made of a thermally conductive material. The remainder of the cover element is made of a non-heat-conducting material. This bi-material 14g cover element can be produced by coextrusion.
    权利要求:
    Claims (14)
    [0001]
    REVENDICATIONS1. Longitudinal structural element (14a-14f, 30a-30d) for a windscreen wiper (10 '), in particular a motor vehicle, said structural element comprising a non-metallic main body, characterized in that said main body comprises at least one portion (39) made of a thermally conductive material or covered with a layer (60) of a non-metallic thermally conductive material.
    [0002]
    2. Structure element (14a-14f, 30a-30d) according to claim 1, characterized in that the thermally conductive material or the non-metallic thermally conductive material has a thermal conductivity greater than or equal to 1 W. m-1. Kl.
    [0003]
    3. Structural element (14a-14f, 30a-30d) according to claim 1 or 2, characterized in that the thermally conductive material or the non-metallic thermoconductive material comprises thermally conductive fillers.
    [0004]
    4. Element of structure (14a-14f, 30a-30d) according to one of the preceding claims, characterized in that said main body comprises a longitudinal housing (42) for receiving a longitudinal vertebra 20 (18) for stiffening, said housing being delimited at least in part by a bottom wall (39) and two side walls (43) connected to said bottom wall, at least a part of said bottom wall being made of said heat-conducting material or covered with said layer; (60) non-metallic heat conducting material. 25
    [0005]
    5. Element structure (14a-14f, 30a-30d) according to one of the preceding claims, characterized in that said main body further comprises a longitudinal housing (32) for receiving a heel (34) of a wiper blade (16).
    [0006]
    6. Structure element (14a-14f, 30a-30d) according to one of the preceding claims, characterized in that said main body further comprises at least one longitudinal channel (45) of fluid passage and / or an aerodynamic deflector (20).
    [0007]
    An assembly comprising a structural element (14a-14f, 30a-30d) according to one of the preceding claims and a heating element (49), such as a heating film, said heating element being configured to heat said at least one part (39) of the main body or said layer (60).
    [0008]
    8. An assembly according to claim 7, in dependence on claim 3, characterized in that it further comprises a longitudinal vertebra (18) of stiffening, said vertebra being mounted in said housing (42) of the main body and comprising, at rest, a concave curved lower face, said heating element (49) being interposed between said lower face of the vertebra and said bottom wall (39) of the body.
    [0009]
    9. An assembly according to claim 8, characterized in that the heating element (49) is fixed on said lower face of the vertebra (18) and is spaced from said bottom wall (39) or in contact therewith .
    [0010]
    10. The assembly of claim 9, characterized in that the heating element is fixed on said bottom wall (39).
    [0011]
    11. Assembly according to one of claims 7 to 10, characterized in that the main body is made in its entirety thermally conductive material.
    [0012]
    12. Assembly according to one of claims 7 to 10, characterized in that the main body is made, preferably by co-extrusion, from two materials including said thermally conductive material.
    [0013]
    13. Wiper blade (10 '), in particular a motor vehicle, comprising a structural element (14a-14f, 30a-30d) according to one of claims 1 to 6 or an assembly according to one of the Claims 7 to 12.
    [0014]
    14. A method of manufacturing a structural element (14a-14f, 30a-30d) according to one of claims 1 to 6, characterized in that it comprises: - a step of extruding its main body from of a thermally conductive material, or - a step of co-extruding its main body from a thermally conductive material and another non-thermally conductive material, or - a step of extruding its main body from a non-thermally conductive material, then a step of depositing a layer of non-resistive thermoconductive material on a portion of said body.
    类似技术:
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    同族专利:
    公开号 | 公开日
    WO2015132049A1|2015-09-11|
    FR3018248B1|2016-03-11|
    CN106103213A|2016-11-09|
    EP3113989A1|2017-01-11|
    US20170072910A1|2017-03-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE10234267A1|2002-07-27|2004-02-05|Robert Bosch Gmbh|Wiper blade for cleaning motor vehicle windscreens has a flexible ribbon-type elongated supporting element and an element for heating the wiper blade to ensure movement in winter conditions|
    EP1566317A2|2004-02-19|2005-08-24|Kässbohrer Geländefahrzeug AG|Wiper unit for a vehicle|
    DE102009004943A1|2009-01-16|2010-07-22|Daimler Ag|Wiper device, particularly for pane of motor vehicle, comprises wiper sheet, wiper arm, and spraying nozzle arranged at wiper arm for spraying of washing liquid|
    WO2011003613A1|2009-07-08|2011-01-13|Valeo Systèmes D' Essuyage|Flat wiper blade|
    US20130193129A1|2010-07-06|2013-08-01|Hwb, Llc|Heated wiper blade for motor vehicles and the like|
    FR2984256A1|2011-12-19|2013-06-21|Valeo Systemes Dessuyage|PLASTIC AND THERMOCONDUCTIVE COMPONENT OF A SYSTEM FOR THE SUPPLY AND / OR DISTRIBUTION OF ICE WASTE LIQUID OF A MOTOR VEHICLE|
    US5065471A|1990-11-09|1991-11-19|Sylvain Laplante|Antifreeze self-spraying and -warming windshield wiper|
    US5488752A|1993-12-23|1996-02-06|Randolph; Norman C.|Heat conducting apparatus for wiper blades|
    US5957384A|1997-08-26|1999-09-28|Lansinger; Jere Rask|Windshield heated wiping system|
    FR2929215B1|2008-03-26|2010-04-02|Valeo Systemes Dessuyage|WIPER BLADE FOR VEHICLE WINDOWS|
    WO2012006363A2|2010-07-06|2012-01-12|Hwb, Llc|Improved heated wiper blade for motor vehicles and the like|
    CN202728172U|2012-09-10|2013-02-13|余姚市鼎鑫模塑有限公司|Electrical-heating automotive wiper|
    CN103507765A|2013-09-29|2014-01-15|国家电网公司|Automobile windshield wiper with electric heating function|FR3057836B1|2016-10-20|2019-05-10|Valeo Systemes D'essuyage|CONNECTION MODULE FOR A WIPING DEVICE OF A MOTOR VEHICLE|
    FR3057834B1|2016-10-25|2018-11-09|Valeo Systemes D'essuyage|AUTOMOBILE WINDOW WIPING DEVICE COMPRISING A WIPER BLADE AND A PIEZOELECTRIC FILM|
    FR3057833B1|2016-10-25|2018-11-09|Valeo Systemes D'essuyage|AUTOMOTIVE VEHICLE WINDOW TOWING DEVICE COMPRISING A WIPER BLADE, A SIGNAL RECEIVER AND A PIEZOELECTRIC ELEMENT|
    DE102018222242A1|2018-12-19|2020-06-25|Robert Bosch Gmbh|Wiper blade, in particular for a motor vehicle|
    法律状态:
    2015-03-31| PLFP| Fee payment|Year of fee payment: 2 |
    2016-03-31| PLFP| Fee payment|Year of fee payment: 3 |
    2017-03-31| PLFP| Fee payment|Year of fee payment: 4 |
    2018-03-29| PLFP| Fee payment|Year of fee payment: 5 |
    2020-03-31| PLFP| Fee payment|Year of fee payment: 7 |
    2021-03-30| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1451844A|FR3018248B1|2014-03-07|2014-03-07|LONGITUDINAL STRUCTURE ELEMENT FOR A WIPER BLADE|FR1451844A| FR3018248B1|2014-03-07|2014-03-07|LONGITUDINAL STRUCTURE ELEMENT FOR A WIPER BLADE|
    EP15703581.7A| EP3113989A1|2014-03-07|2015-02-09|Longitudinal structural element for a windscreen wiper|
    US15/123,302| US20170072910A1|2014-03-07|2015-02-09|Longitudinal structural element for a windscreen wiper|
    CN201580011908.5A| CN106103213A|2014-03-07|2015-02-09|Vertical structure element for windshield wiper|
    PCT/EP2015/052666| WO2015132049A1|2014-03-07|2015-02-09|Longitudinal structural element for a windscreen wiper|
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