Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B60—VEHICLES IN GENERAL
  • B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
  • B60J3/00—Antiglare equipment associated with windows or windscreens; Sun visors for vehicles
  • B60J3/02—Antiglare equipment associated with windows or windscreens; Sun visors for vehicles adjustable in position
  • B60J3/0204—Sun visors

Definitions

• the invention relates to a sun visor for a motor vehicle, of the type comprising a support structure, an extension structure movable in translation relative to the support structure, and a connecting mechanism connecting the extension structure to the structure support and allowing translation of the extension structure between a retracted position and an extended position.
• EP-B-138 510 discloses a sun visor comprising a support structure and an extension structure movable in translation relative to the support structure between a retracted position within the support structure and an extended position in which the extension structure extends partly outside the support structure.
• the extension structure includes a mirror.
• the sun visor also includes a link mechanism comprising an attachment bar on the support structure, an attachment bar on the extension structure and two arms connecting the two bars.
• the two arms are articulated in their middle on one another in a purely rotational and X-shaped manner.
• the two arms are articulated in a purely rotary manner on one and the same side of the bars and are articulated to rotate and slide on an opposite side. bars.
• the attachment bar on the extension structure is mounted purely sliding inside the support structure. However, the difference in the occultation surface between the deployed position and the retracted position of the sun visor is not sufficient to be mounted to a narrow cross member.
• An object of the invention is to increase the concealment surface of the sun visor when the extension structure is deployed.
• the subject of the invention is a sun visor of the aforementioned type, characterized in that the connecting mechanism is such that it extends beyond the support structure when the extension structure is in position. deployed position.
• the sun visor comprises one or more of the following characteristics, taken in isolation or according to all the technically possible combinations:
• the sun visor comprises occulting means extending between the support structure and the extension structure when the extension structure is in the deployed position, the concealment means masking the connection mechanism;
• the occultation means comprise an occultation cloth and a canvas winder making it possible to adjust the length of the cloth to the position of the extension structure;
• the linking mechanism comprises two support arms articulated on the support structure and two extension arms distinct from the support arms, the extension arms being articulated on the extension structure, the extension arms being articulated to the support arm; - Each support arm is articulated purely rotary on the support structure, each extension arm being articulated purely rotary on the extension structure, and each support arm being articulated purely rotary to a single extension arm;
• each arm is articulated to a support arm and an extension arm by direct engagement of gear teeth provided on a toothed end of each arm;
• the connecting mechanism comprises two rigid arms articulated together in their middle, each arm being articulated to the support structure and the extension structure at two opposite ends;
• connection mechanism comprises differential friction means, the friction generated by said friction means when the extension structure is displaced towards its deployed position being smaller than the friction generated by said friction means when the extension structure is moved to its retracted position;
• said friction means comprise at least one slider slidably mounted on a rail of one of the support structure and of the extension structure, the slider being furthermore pivotable on the rail between a low friction position and a high friction position, one of the arms being articulated to the pad;
• the or each movable shoe has a groove mounted to slide and tiltable on the rail, the groove surrounding the rail, the groove having a throat and four walls converging two by two to the throat.
• FIG. 1 is a schematic sectional view of a portion of a motor vehicle, illustrating a sun visor according to the invention
• FIG. 2 is a schematic top view partially broken away of a sun visor according to a first embodiment, on which a shade screen has not been shown for better visibility;
• FIG. 3 is a sectional view along line I-111 of the sun visor of FIG. 2, the occulting fabric being shown;
• FIG. 4 is an enlarged view of detail IV of FIG. 2;
• FIG. 5 is a view similar to FIG. 2 of a sun visor according to a second embodiment of the invention;
• FIG. 6 is a view similar to FIG. 3 of the sun visor of FIG. 5;
• FIG. 7 is a view similar to Figures 3 and 5 of a sun visor according to a third embodiment.
• FIG. 8 is an enlarged view of a detail VIII of Figure 7.
• FIG. 1 illustrates a portion of a front windshield 2 and a roof 4 of a motor vehicle.
• the terms “front” and “rear” are understood by reference to the direction of movement of the vehicle in the forward direction, illustrated by an arrow S in FIG. 1.
• the roof 4 comprises a front cross member 6 along the windshield 2 and a glazed flag 8 at the rear of the crossbar 6.
• the vehicle comprises an extensible sun visor 10 articulated on the crossbar 6.
• the sun visor 10 is thus rotatable between a storage position in which the sun visor 10 is substantially parallel to the crossbar 6 and applied against the crossbar 6 , and a plurality of use positions in which the sun visor 10 provides a light concealment surface from the windshield 2 or the glazed flag 8.
• the sun visor 10 comprises a support structure 12 articulated at the rear on the crossmember 6 and an extension structure 14 that can move in translation relative to the support structure 12, following a direction XX, between a plurality of positions including a retracted position and an extended position.
• the retracted position is very compact, which allows the use of a cross member 6 of small width. It is thus possible to maximize the glass area of the windshield 2 and / or the roof 8.
• the support structure 12 comprises a reflection device of the illuminated courtesy mirror type.
• the sun visor 10 comprises a connecting mechanism 16 connecting the support and extension structures 12, 14.
• the extension structure 14 is carried only by the mechanism 16.
• the sun visor 10 comprises means 20 for concealing the light, illustrated in FIG. 3.
• the means 20 for concealment comprise a mask 22 concealing the mechanism 16 and extending between the structures 12 , 14, and a retractor 24 of fabric for adjusting the length of the fabric 22 to the position of the extension structure 14 so that the fabric 22 is always stretched, as shown in Figure 3.
• the fabric 22 extends on both sides of the mechanism 16 and surrounds.
• Support and extension structures 12, 14 respectively comprise a support shell 26 and an extension shell 28.
• Each shell 26, 28 is formed of two half-shells respectively lower and upper 34 substantially symmetrical with respect to each other and contiguous to each other (see Figure 3).
• the half-shells 30, 34 are for example glued, welded and / or nested with each other. Nevertheless, each shell 26, 28 is for example a single piece of material.
• the structures 12, 14 have the same length corresponding to the length of the shells 26, 28, measured transversely to the X-X direction.
• Each shell 26, 28 comprises an end edge 38 delimiting a mouth 40 towards the inside of the shell 26, 28.
• the shells 26, 28 have a generally U-shaped cross section. The U of each shell 26, 28 are turned towards each other and aligned. Thus, when the extension structure 14 is in the retracted position, the edges 38 of the two shells 26, 28 are contiguous. The mouths 40 of the two shells 26, 28 have the same dimensions. When the shells 26, 28 are contiguous, the edges 38 coincide and the sun visor 10 has a substantially smooth outer surface and continuous. In the retracted position, the connecting mechanism 16 and the fabric 22 are entirely inside the enclosure defined by the two shells 26, 28. They are therefore not visible.
• the width of the sun visor 10 in the retracted position, measured parallel to the extension direction X-X, is for example between 80 and 90 mm, preferably about 80 mm.
• the width of the sun visor 10 in the extended position is for example between 160 and 190 mm, preferably approximately equal to 160 mm.
• the linking mechanism 16 connects the support and extension shells 26, 28.
• the mechanism 16 comprises four arms 44, 46 of the same length, including two support arms 44 bearing on the support structure 12 and two extension arms 46 resting on the extension structure 14.
• the support and extension structures 12, 14 comprise means 50 for receiving the arms 44, 46.
• Each arm 44, 46 has a bearing end 52 hinged to the receiving means 50 and a toothed end 54 opposite the bearing end 52 and
• the toothed rings 56 of the four arms 44, 46 comprise teeth 58 and are engaged with each other by engagement of the teeth 58, as illustrated in FIGS. 2 and 4.
• mechanism 16 comprises a clamping base 60 carrying the four ends 54 in a purely rotary manner.
• the base 60 comprises a lower half-pedestal 62 provided with four rods 64 projecting towards an upper half-pedestal (not shown) and each through a bore 66 of a respective arm 44, 46, the four rods 64 being arranged at the four corners of a square.
• the teeth 58 of each arm 44, 46 are in direct contact with the teeth 58 of an extension arm 46 and with the teeth 58 of a support arm 44.
• a rotation of one of the arms 44, 46 around the associated rod 64 of the base 60 of an undirected angle causes a rotation of each of the arms 44, 46 around its rod 64 associated at the same angle.
• the upper half-base is for example screwed on the lower half-base 62.
• the friction of the base 60 on the toothed ends 56 of the arms 44, 46 are adjusted by tightening more or less the upper half-base on the lower half-base 62.
• the bearing ends 52 of a support arm 44 and an extension arm 46 adjacent to each other are mounted purely rotatably on the support structure 12 and the extension structure 14 respectively.
• the means 50 are each equipped with a pivot 68.
• the bearing ends 52 of the other support arm 44 and of the other extension arm 46 are rotatably articulated sliding respectively on the support structure 12 and the extension structure 14.
• the support means reception 50 comprise a slide rail 70 on each of the support and extension structures 12, 14, the support end 52 of the arm 44, 46 being articulated purely rotary on a profile 72 in I itself mounted purely sliding in the rail 70.
• the joints of the bearing ends 52 are substantially frictionless.
• the purely rotatable hinged arms 44, 46 are on the same side, i.e. they are adjacent and are meshed directly with each other.
• the sliding rotary arms 44, 46 are on the opposite side and engage directly with each other.
• Each arm 44, 46 is articulated directly or indirectly to each of the other arms 44, 46.
• the forces are transmitted to the set of arms 44, 46. In this way, the movement of the arms 44, 46 is fluid and will not become blocked.
• the reel 24 is mounted on the support structure 12, inside the shell 26.
• the fabric 22 has a width measured perpendicular to the direction of extension
• the fabric 22 has a first end 74 fixed on the reel 24 and a second end 76 fixed on the inside of the shell 26.
• the structure 12 comprises, inside the shell 26, on the upper half-shell 34, a guide slot 78 along the edge, while the extension structure 14 has upper slots
• the fabric 22 passes through the slot 78, then the slot 80, before making a half-turn around a tube 84 and through the slot 82. It then joins the support structure 12 to level of its second end 76.
• the fabric 22 thus forms two upper sections 86 and lower 88 parallel. The sections 86, 88 extend on either side of the arms 44, 46.
• the fabric 22 is made of a fabric suitable for the occultation of sunlight, for example of the glazed roof shade type 8 or door panel.
• the winder 24 comprises a winding shaft 90 rotatably mounted on the inside of the shell 26 and a torsion spring (not shown) permanently generating a torque on the shaft 90 so as to exert tension on the fabric 22
• the tensile force generated by the winder 24 on the fabric 22 is for example about 5 Newtons when the extension structure 14 is in the retracted position and about 10 Newtons when the extension structure 14 is in the deployed position. .
• the fabric 22 being secured to the support structure 12 and the fabric 22 pressing on the tube 84, the winder 24 generates, via the fabric 22, a tensile force on the extension structure 14 equal to the tensile force of the retractor 24 on the canvas
• the retractor 24 therefore tends to reduce the structure
• the extension structure 14, because of its mass and the vertical movements of the vehicle, may have to withstand an acceleration of up to about 3 G, which can be about 5 N in the example shown.
• the base 60 must generate sufficient friction forces to counter the combination of forces described above.
• the base 60 is thus for example tightened so as to prevent the displacement of the extension structure 14 for a force along the direction XX less than or equal to about 15 N.
• the user will have to generate a force in the X-X direction between 20 and 30 N to counter the combination of efforts of the reel 24 and friction forces.
• the user will instead generate a force in the X-X direction between 5 and 10 N, the forces of the retractor 24 assisting the displacement to the retracted position.
• the link mechanism 16 is adapted to maintain the extension structure 14 in any of the positions between the deployed and retracted positions.
• the reel 24 is not necessarily located on the support structure 12, it is for example on the extension structure 14.
• the link mechanism 16 extending at least partially beyond the support structure 12 when the extension structure 14 is in the deployed position, the extension structure 14 has dimensions independent of the structure 12, that is to say that in the plane of displacement of the extension structure, the mechanism extends between the structures 12 and 14.
• the lengths of the two structures 12, 14 are identical; which would not be possible if the linking mechanism did not extend beyond the support structure 12 as explained above.
• the sun visor 10 forms, thanks to this particular feature of the invention, substantially a rectangle and whatever the position of the extension structure 14. The occulting surface formed in the deployed position is important.
• the width of the sun visor 10 in the retracted position of the extension structure 14 is small and the size of the sun visor 10 is small.
• the sun visor 10 provides a discreet, aesthetic and adjustable occultation surface.
• the sun visor 10 does not "pass" in front of the user's face when it is moved to a position of use. The discomfort associated with the installation of the sun visor 10 is thus reduced and the risk of accident also.
• the sun visor 10 is partly identical but differs by its connecting mechanism 16 and the receiving means 50 of the support and extension structures 12, 14.
• the mechanism 16 comprises two distinct pairs of arms 44, 46 hinged to each other.
• Each pair 92 comprises a support arm 44 and an extension arm 46.
• Each arm 44, 46 of each pair 92 has a purely rotary rotational end 52 on the receiving means 50 and an opposite end 104 of a purely rotatable articulated connection at the connecting end 94 of the other arm 44. , 46 of the same pair 92.
• the receiving means 50 comprise pivots 68 receiving the bearing ends 52 in substantially friction-free rotation respectively on the upper half-shell 34 of the extension structure 14 and on the lower half-shell 30 of the support structure 12 .
• connection ends 94 comprise a bore 96.
• the bores 96 of the same pair 92 of arms 44, 46 are traversed by a connecting shaft 98.
• the shaft 98 also passes through a friction ring 100 made of elastomer material mounted between the two connecting joints 94.
• the two joints 94 are thus in contact with the ring 100. Nevertheless, the ring 100 is for example in all other suitable material.
• the shaft 98 further comprises two rings 102 on either side of the arms 44, 46.
• the position of the rings 102 makes it possible to tighten the arms 44, 46 more or less between them.
• the elastomeric ring 100 is tightened so as to prevent the displacement of the extension structure 14 for a force in the direction XX less than or equal to about 15 N.
• the ends 52 are preferably located near the longitudinal ends of the support and extension structures 12, 14, as illustrated in FIG. 5. In this way, the mechanism 16 has a more fluid displacement when the force of the user is applied to one end of the extension structure 14.
• the fabric 22, the reel 24, and the guide slots 78, 80, 82 are identical to those of the first embodiment.
• Figures 7 and 8 illustrate a third embodiment of the invention, which differs essentially from the other two embodiments by its connecting mechanism 16 and the receiving means 50. Elements similar to the previous embodiments bear the same numbers reference in Figures 7 and 8.
• the mechanism 16 comprises only two arms 110 hinged together in a purely rotational manner in their middle.
• the two arms 110 are identical and are arranged one on the other. They together form substantially an X.
• Each arm 110 is articulated at a first end 112 on the support structure 12 and at a second end 114 opposite to the extension structure 14.
• the articulation of the first end 112 of one arms 110 is purely rotary while the articulation of the second end 114 of the same arm 110 is slidingly rotating.
• the articulation of the first end 112 of the other of the arms 110 on the support structure 12 is slidingly rotatable while the articulation of the second end 114 of the same arm 110 on the extension structure 14 is purely rotary.
• the receiving means 50 of the support and extension structures 12, 14 each comprise a pivot 68 on which is articulated the purely rotary end of an arm 110.
• the receiving means 50 of one of the The arms are located on the respective lower half-shells while the receiving means 50 of the other arm 110 are located on the respective upper half-shells 34.
• the arms 110 constitute means of displacement in pure translation of the extension structure 14 relative to the support structure 12, the arms defining the diagonals of a rectangle.
• the connecting mechanism 16 further comprises means 116 for differential friction in the direction of movement of the extension structure 14 comprising two identical pads 118.
• Each sliding rotary end of the arms 110 is mounted purely rotatively on one of the shoes 118.
• Each shoe 118 is itself slidably mounted on a rail 120 of the receiving means 50.
• the shoe 118 has a groove 122 of which a section substantially forms a U surrounding the rail 120.
• the groove 122 comprises four flat walls 124 converging two by two to a throat 126 of the groove 122.
• the width "I" of the constriction 126 is substantially equal to the width of the rail 120. In this way, the groove 122 is slidably and tiltingly mounted on the rail 120, the tilting being effected around its throat 126.
• the shoe 118 further comprises a friction spring 128 projecting towards a friction surface 130 of the receiving means 50.
• the surface 130 is parallel to the rail 120.
• the shoe 118 is tilting between a large friction position in which the spring 128 is pressed into a substantial frictional position against the surface 130 and a low friction position in which the spring 128 is placed only in a position of low friction against the surface 130 or spaced from the surface 130.
• the articulation with the arm 110 and the constriction 126 are offset by a non-zero distance "d" along the longitudinal axis of the sun visor 10.
• the pad 118 tilts in its large frictional position.
• the arm “pulls” on the shoe 118 that is to say when the extension structure 14 is moved to its extended position, the shoe 118 switches to its low friction position.
• the differential friction means generate low friction, for example, able to counter a stress on the extension structure of less than or equal to 10 N, when the extension structure 14 is moved to its deployed position.
• the friction generated when the extension structure 14 is returned to its retracted position is important and is for example suitable to counter a force on the extension structure 14 in the X-X direction less than or equal to 15 N.
• the effort to be applied by the user on the structure 14 to move it to its deployed position is about 7 to 12 Newtons, and to move it towards its retracted position the effort required is also about 7 to 12 Newtons.
• the perceived quality of the sun visor 10 and its comfort are thus improved.
• the pad 118 does not necessarily include a groove 122 as described above. It comprises for example a rail, the receiving means 50 comprising a groove receiving the rail sliding and tilting.
• the rail comprises, for example, an enlarged zone and four walls converging two by two from the extended zone towards the ends of the rail.
• the link mechanism 116 is substantially identical to that of the first embodiment illustrated in FIGS. 2 and 3, but also comprises the differential friction means of the third embodiment, at the level of the rotary joints. sliding arms 44, 46.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Pivots And Pivotal Connections (AREA)

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• 2007
  • 2007-04-18 FR FR0754547A patent/FR2915139B1/fr not_active Expired - Fee Related
• 2008
  • 2008-04-03 EP EP08788113A patent/EP2137017A1/de not_active Withdrawn
  • 2008-04-03 WO PCT/FR2008/050589 patent/WO2008145879A1/fr active Application Filing

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