JP5886604B2 - Window shade device for vehicle - Google Patents

Description

  The present invention relates to a vehicle window shade device that covers a vehicle window so as to be shieldable and openable.

  A typical vehicle window shade device includes a winding shaft disposed along a lower edge of the window, and a shade wound around the winding shaft. And the shade pulled out from the winding shaft shields the window.

  By the way, when the side edge part of a window inclines with respect to the lower edge part of a window, the clearance gap between the side edge part of a shade and the side edge part of a window changes according to the pulling-out degree of a shade. For this reason, depending on the pulling-out degree of a shade, a big clearance gap will arise between the side edge part of a shade, and the side edge part of a window.

  Therefore, Patent Documents 1 and 2 disclose a technique for moving the winding shaft along the axial direction in accordance with the withdrawal of the shade.

  In patent documents 1 and 2, the winding shaft is rotatably supported by screwing a screw into a screw hole formed in the winding shaft. When the winding shaft rotates in accordance with the withdrawal of the shade, the winding shaft moves along the axial direction by the screwed structure of the screw and the screw hole. As a result, the winding shaft is moved along the axial direction in accordance with the degree of withdrawal of the shade, so that the gap between the side edge of the shade and the side edge of the window is made as small as possible.

Japanese Patent Laid-Open No. 2-16284 JP 2006-274792 A

  However, in Patent Documents 1 and 2, since the winding shaft is supported by a screwed structure of screws and screw holes, the support strength of the winding shaft may be weakened.

  Therefore, it is an object to be able to move the winding shaft in the axial direction with the rotation thereof and to improve the support strength of the winding shaft.

  In order to solve the above-mentioned problem, a first aspect is a vehicle window shade device that covers a window so that the window can be shielded and opened, and a window shade that can shield the window, and a winding that can wind the window shade. A shaft, a pair of support shafts that rotatably support the winding shaft and move along the axial direction thereof, and a biasing mechanism that biases the winding shaft in a direction of winding the window shade, A relay transmission member formed in a long member disposed along the axial direction of the winding shaft and movable along with the winding shaft along the axial direction of the winding shaft; A transmission mechanism that converts the rotational motion of the shaft into a linear motion and moves the winding shaft in the axial direction thereof.

A second aspect is the vehicle window shade device according to the first aspect, wherein one of the pair of support shafts is an interlocking support shaft that is rotatable together with the winding shaft, and the relay transmission member is The transmission mechanism includes a first gear that is rotatably disposed in conjunction with the interlocking support shaft, and is capable of meshing with the first gear and orthogonal to the first gear. further comprising a second gear having an axis of rotation, and a third gear rotatably provided in association with the rack gear portion component engageable with a and the second gear to.

  A third aspect is the vehicle window shade device according to the second aspect, wherein the interlock support shaft is movable in the axial direction with respect to the winding shaft, and the first gear is the interlock. It is a member integrated with the support shaft.

  A fourth aspect is a vehicle window shade device according to any one of the first to third aspects, wherein an annular groove is formed in the winding shaft, and the relay transmission member is fitted in the annular groove. The winding shaft is rotatable with respect to the shaft coupling portion, and the shaft coupling portion is restricted in the axial direction with respect to the winding shaft. In the state, the shaft connecting portion is fitted in the annular groove.

  According to the vehicle window shade device according to the first aspect, when the winding shaft is rotated, the rotational motion is converted into a linear motion via the transmission mechanism and transmitted to the winding shaft. Thereby, a winding shaft can be moved to the axial direction with the rotation. At this time, since the take-up shaft is moved in the axial direction via the relay transmission member, the pair of support shafts do not need to be formed with a thread groove or the like, and the support strength of the take-up shaft is improved. Can be made.

  According to the second aspect, the rotational motion of the winding shaft can be transmitted to the winding shaft via the interlocking support shaft, the first gear, the second gear, the third gear, and the relay transmission member.

  According to the third aspect, the interlocking support shaft can be arranged at a fixed position along the axial direction regardless of the movement of the winding shaft. Thereby, the interlocking support shaft and the first gear can be configured integrally.

  According to the fourth aspect, the winding shaft is rotatable with respect to the relay transmission member, and the relay transmission member and the winding shaft are movable together along the axial direction of the winding shaft. can do.

It is explanatory drawing which shows the state with which the window shade apparatus for vehicles was attached to the vehicle. It is explanatory drawing which shows the state with which the window shade apparatus for vehicles was attached to the vehicle. It is explanatory drawing which shows the state with which the window shade apparatus for vehicles was attached to the vehicle. It is a permeation | transmission perspective view which shows the window shade apparatus for vehicles. It is a permeation | transmission perspective view of the one end side part of the window shade apparatus for vehicles. It is sectional drawing of the window shade apparatus for vehicles. It is a disassembled perspective view of the other end side part of the window shade apparatus for vehicles. It is a disassembled perspective view of the one end side part of the window shade apparatus for vehicles. It is explanatory drawing which shows operation | movement of the window shade apparatus for vehicles. It is explanatory drawing which shows operation | movement of the window shade apparatus for vehicles. It is explanatory drawing which shows operation | movement of the window shade apparatus for vehicles. It is explanatory drawing which shows operation | movement of the window shade apparatus for vehicles.

  Hereinafter, the window shade device for vehicles concerning an embodiment is explained.

  For convenience of explanation, the overall operation of the vehicle window shade device will be described first. 1 to 3 are explanatory views showing a state in which the vehicle window shade device 20 is attached to the vicinity of the window 10 of the vehicle, FIG. 1 is a state in which the window shade 30 is completely wound, and FIG. FIG. 3 shows a state where the shade 30 is pulled out partway, and FIG. 3 shows a state where the window shade 30 is completely pulled out. In the present embodiment, the case where the window 10 is a side window on the side of the rear seat, that is, a side window between the B pillar and the C pillar will be described. It may be.

  The window 10 has an upper edge 12a of the door panel 12 that is a first frame, and one side frame that is a second frame that is inclined with respect to the edge 12a (here, inclined at an obtuse angle). 14a is disposed inside.

  More specifically, the window 10 is disposed in a window frame 14 above the door panel 12 so as to be opened and closed. That is, a window frame 14 is disposed above the upper edge portion 12a of the door panel 12 so as to surround both sides and the upper three sides of the upper region. One side frame portion 14a of the window frame 14 (the left side in FIGS. 1 to 3 and the rear side in the vehicle) has an oblique posture that forms an obtuse angle from the rear end portion of the upper edge portion 12a of the door panel 12, in this case, the vehicle rear side. It extends upward in a posture inclined to the side. Further, the other side frame portion 14b of the window frame 14 (the right side in FIGS. 1 to 3, the front side in the vehicle) has an oblique posture that is an acute angle from the front end portion of the upper edge portion 12a of the door panel 12, here the vehicle rear It extends upward in a posture inclined to the side. That is, one side frame portion 14a and the other side frame portion 14b are in a parallel posture. However, it is not essential that the side frame portions 14a and 14b are in a parallel posture. The upper frame portion 14c of the window frame 14 is disposed in an oblique (slightly oblique) posture with respect to the upper edge portion 12a of the door panel 12 and spaced from the upper edge portion 12a. But the upper frame part 14c of the window frame 14 may be a parallel attitude | position with respect to the edge part 12a.

  The window 10 is provided so as to be openable and closable from the door panel 12 into the window frame 14. In a state where the window 10 is closed so as to cover the entire inside of the window frame 14, the exposed area of the window 10 is an internal area surrounded by the edge 12 a of the door panel 12 and the window frame 14.

  Usually, with the occupant seated in the rear seat, the occupant's face is positioned inside the one side frame portion 14a, so that the occupant's face can be shielded from the outside in the vicinity of the one side frame portion 14a. It is preferable to do. The vehicle window shade device 20 relates to a technique for reducing the gap between the window shade 30 and the one side frame portion 14a in the vicinity of the one side frame portion 14a as much as possible.

  That is, in this embodiment, the winding shaft 40 that winds up the window shade 30 is disposed along the edge portion 12 a of the door panel 12. The take-up shaft 40 moves in the axial direction, that is, along the upper edge 12 a of the door panel 12 in accordance with the degree of drawing out of the window shade 30. That is, in a state where the window shade 30 is completely wound around the winding shaft 40, the winding shaft 40 exists at a position away from the one side frame portion 14a. In this state, a gap is formed between the winding shaft 40 and the one side frame portion 14a, and the window shade 30 is wound around the winding shaft 40 in a state of extending to the gap. (See FIG. 1).

  When the window shade 30 is pulled out from this state and the window shade 30 closes partway in the vertical direction of the window 10, the winding shaft 40 moves toward the one side frame portion 14a along the axial direction. In accordance with this movement, the edge portion along the one side frame portion 14a of the window shade 30 moves to the one side frame portion 14a side. By this movement, a gap between the side edge portion on the one side frame portion 14a side of the window shade 30 and the one side frame portion 14a can be narrowed (see FIG. 2).

  When the window shade 30 is further pulled out from the above state and the window shade 30 shields almost the entire window 10, the winding shaft 40 further moves toward the one side frame portion 14a along the axial direction thereof. Concurrently with this movement, the edge portion of the window shade 30 along the one side frame portion 14a further moves to the one side frame portion 14a side. By this movement, a gap between the side edge portion on the one side frame portion 14a side of the window shade 30 and the one side frame portion 14a can be narrowed (see FIG. 3).

  For this reason, the gap between the side edge part on the one side frame part 14a side of the window shade 30 and the one side frame part 14a in both the state where the window shade 30 is being pulled out and the state in which the window shade 30 is completely pulled out. Can be made as small as possible.

  In order to realize the above, a configuration for moving the winding shaft 40 according to the pulled-out state of the window shade 30 in the vehicle window shade device 20 according to the present embodiment will be described. 4 is a transparent perspective view showing the vehicle window shade device 20, FIG. 5 is a transparent perspective view of one end side portion of the vehicle window shade device 20, and FIG. 6 is a sectional view of the vehicle window shade device 20. As shown in FIG. FIG. 7 is an exploded perspective view of the other end portion of the vehicle window shade device 20, and FIG. 8 is an exploded perspective view of the one end portion of the vehicle window shade device 20. In addition, the window shade 30 is abbreviate | omitted in each following figure.

  The vehicle window shade device 20 includes a window shade 30, a winding shaft 40, support shafts 50 and 60 as a pair of support shafts, an urging mechanism 70, and a transmission mechanism 80.

  The window shade 30 is a sheet-like member formed by cutting and sewing materials such as a mesh-like cloth and a resin sheet (see FIG. 3). Here, the window shade 30 is formed in a size and shape that covers an exposed portion surrounded by the edge 12 a of the door panel 12 and the window frame 14 in the window 10. The window shade 30 preferably has a size and a shape that can shield almost the entire window 10, but can have a shape and size that shields a part of the window 10, or a plurality of windows can be shielded collectively. It may be formed in a shape and size. The drawer length of the window shade 30 is, for example, 400 mm to 500 mm.

  A stay 32 is attached to the end of the window shade 30 in the drawing direction. Here, since the window shade 30 is wound up by the winding shaft 40 and is drawn upward along the window 10 from the winding shaft 40, the upper end portion of the window shade 30 is the drawing direction side end portion. . When the window shade 30 is wound up, the stay 32 is disposed in a drawer slit 46h of the case 46 described later or in an opening thereof. By pulling the stay 32 along the window 10 from this state, the window shade 30 is pulled out along the window 10 through the drawing slit 46h. Further, the stay 32 is provided with a hook portion (not shown) that can be locked to a locked portion provided in the upper frame portion 14 c of the window frame 14. And in the state which pulled out the window shade 30, the window shade 30 is maintained in the state pulled out by latching the said hook part to the said to-be-latched part.

  The winding shaft 40 is configured to be able to wind the window shade 30. More specifically, the winding shaft 40 includes a shaft main body portion 41, a bearing 42, and a shaft connection receiving member 43. The length dimension of the winding shaft 40 is smaller than the length dimension of the edge 12a of the door panel 12 and the length dimension of the case 46 described later. Therefore, the winding shaft 40 can be moved along the longitudinal direction of the edge portion 12a and the case 46 in a state where the winding shaft 40 is disposed in a posture along the longitudinal direction of the edge portion 12a and the case 46.

  The shaft main body 41 is formed in a cylindrical member made of metal or the like. A plurality of protrusions extending along the longitudinal direction are formed on the inner peripheral portion of the shaft main body 41.

  The bearing 42 is formed in a cylindrical shape that can be inserted into the other end of the shaft body 41 (see FIGS. 4 and 7). A spline groove 42 a is formed in the outer peripheral portion of the bearing 42 along the axial direction thereof. With the main bearing 42 inserted into the other end of the shaft main body 41, the protrusion on the inner peripheral portion of the shaft main body 41 fits into the spline groove 42a, and the bearing 42 rotates with respect to the shaft main body 41. It has come to be stopped. A flange 42 b is formed at one end of the bearing 42. With the bearing 42 inserted into the other end of the shaft main body 41, the flange 42b abuts on the other end opening of the shaft main body 41, thereby positioning the bearing 42 in the axial direction. . Further, an insertion hole 42h through which the support shaft 50 can be rotatably inserted is formed in the inner peripheral portion of the bearing 42.

  The shaft connection receiving member 43 is formed in a cylindrical shape that can be inserted into one end of the shaft main body 41 (see FIGS. 4 and 8). A spline groove 43 a is also formed in the outer peripheral portion of the shaft connection receiving member 43 along the axial direction thereof, similarly to the bearing 42. Thus, the shaft connection receiving member 43 is prevented from rotating with respect to the shaft main body 41 in a state where the shaft connection receiving member 43 is inserted into one end of the shaft main body 41. A flange 44 is formed at one end of the shaft connection receiving member 43, and the flange 44 is connected to the shaft main body 41 in a state where the shaft connection reception member 43 is inserted into one end of the shaft main body 41. The shaft connection receiving member 43 is positioned in the axial direction by contacting the one end side opening. In addition, an insertion hole 43h into which the support shaft 60 can be inserted without being relatively rotatable is formed in the inner peripheral portion of the shaft connection receiving member 43. A plurality of protrusions extending along the longitudinal direction are formed on the inner peripheral portion of the insertion hole 43h.

  An annular groove 44 a extending along the circumferential direction is formed on the outer peripheral portion of the flange portion 44. A shaft connecting portion 96 described later is connected to the annular groove 44a. The annular groove 44a may be formed at the shaft main body 41 itself, particularly at its end.

  The take-up shaft 40 is accommodated in the case 46. The case 46 is a long member formed of a metal such as aluminum, a cylindrical portion 47 that can accommodate the winding shaft 40 and the window shade 30 wound around the winding shaft 40, and a pair of flange portions. 48 (see FIGS. 7 and 8). A slit is formed in one side portion of the cylindrical portion 47, and a pair of flange portions 48 are formed so as to extend outward from both side edge portions sandwiching the slit. An extraction slit 46 h is formed by the space formed between the slit formed in the tubular portion 47 and the pair of flange portions 48. The window shade 30 is pulled out and wound up through the main drawing slit 46h, and the stay 32 is disposed in the opening of the drawing slit 46h or inside the window shade 30 in a state where the window shade 30 is completely wound up.

  The case 46 is formed with a screw stop 45 to which the screw S can be screwed (see FIG. 8). Here, in order to easily process the case 46 by making the cross-sectional shape of the case 46 the same, the screwing portion 45 projects a part of the case 46 into a narrow cylindrical shape extending along the longitudinal direction thereof. This is not essential. And the structure part for supporting the support shafts 50 and 60 mentioned later is screwed and fixed to the both ends of the case 46 using this screw fastening part 45. That is, the case 46 has a role of fixing the support shafts 50 and 60 at a fixed position and a fixed posture on both ends of the winding shaft 40.

  A transmission slit 47S along the longitudinal direction is formed at one end of the case 46. A shaft connecting portion 96 described later is connected to the annular groove 44a via the transmission slit 47S.

  The other end portion of the vehicle window shade device 20, that is, the portion on the support shaft 50 side will be described.

  As shown in FIGS. 4, 6, and 7, the support shaft 50 is configured to support the other end of the winding shaft 40 so as to be rotatable and movable along the axial direction thereof.

  More specifically, the support shaft 50 is formed as a rod-shaped member made of resin. The support shaft 50 is a round bar-like member, and is formed on a smooth cylindrical surface on which no thread groove or the like is formed.

  The support shaft 50 is integrally formed with resin together with the shaft support portion 54.

  The shaft support portion 54 is a member that can be fixed to the other end portion of the case 46 by screws or the like. The support shaft 50 is integrally formed in a projecting posture with respect to the shaft support portion 54, thereby supporting the winding shaft 40 so as to be rotatable and movable along the axial direction thereof.

  Here, the shaft support portion 54 is formed as a plate-like member capable of closing the opening on the other end side of the case 46. More specifically, the shaft support portion 54 is formed in a plate shape in which the protruding plate portion 54b protrudes from the outer peripheral portion of the disc portion 54a. The disc portion 54a is formed in a plate-like portion that can close the other end of the cylindrical portion 47, and the protruding plate portion 54b is formed in a plate-like portion that can close the other end side opening of the pair of flange portions 48. ing. The support shaft 50 protrudes from the central portion of the disc portion 54a in a posture orthogonal to the disc portion 54a. Further, a screw retaining piece 54c having a screw insertion hole is provided on the outer periphery of the shaft support portion 54 so as to project. Then, with the shaft support portion 54 disposed so as to close the other end side opening of the case 46, the screw S is inserted into the screw fastening piece 54c and screwed into the screw fastening portion 45 of the case 46. The shaft support portion 54 is attached and fixed to the other end portion of the case 46. In this state, the support shaft 50 protruding from the shaft support portion 54 is disposed along the central axis of the tubular portion 47. The support shaft 50 is inserted into the insertion hole 42h of the bearing 42 of the take-up shaft 40, so that the other end of the take-up shaft 40 can rotate within the cylindrical portion 47 and in the axial direction along with the rotation. It is supported movably.

  As shown in FIGS. 4, 6, and 7, the winding shaft 40 is attached to the end of the winding shaft 40 that is supported by the support shaft 50 in the direction in which the window shade 30 is wound. An urging mechanism 70 for urging is provided. The urging mechanism 70 includes a coil spring 72 as an urging member and an elastic tube 76 that covers the coil spring 72.

  One end portion of the coil spring 72 is connected to one end portion of the support shaft 50 in the shaft main body portion 41 of the winding shaft 40. Here, the distal end portion (see FIG. 7) of the L-shaped portion at one end portion of the coil spring 72 is inserted into a hole formed in the distal end portion of the support shaft 50, so that one end portion of the coil spring 72 is supported by the support shaft 50. It is connected to the tip of the non-rotatable portion.

  The other end of the coil spring 72 is connected to the inside of the winding shaft 40 so as not to be relatively rotatable. Here, the connection is performed using a spring connecting member 78. The spring connecting member 78 is formed as a long member that can be inserted into the shaft main body 41. A spline groove 78a is formed in at least a part of the outer peripheral portion of the spring connecting member 78 along the axial direction thereof. Then, in a state in which the spring connecting member 78 is disposed in the shaft main body 41, the protrusion on the inner peripheral portion of the shaft main body 41 is fitted into the spline groove 78a. Further, a hole extending along the radial direction is formed in one end portion of the spring coupling member 78, and the tip end portion (see FIG. 7) of the L-shaped portion of the other end portion of the coil spring 72 is inserted into the hole. As a result, the other end of the coil spring 72 is connected to the spring connecting member 78 so as not to rotate relative thereto.

  Then, with the end portions of the coil spring 72 connected to the support shaft 50 and the spring connection member 78, the spring connection member 78, the coil spring 72, and the tip end portions of the support shaft 50 are inserted into the shaft main body 41. In this state, when the winding shaft 40 rotates with respect to the support shaft 50, the spring connecting member 78 also rotates together with the winding shaft 40. Thereby, the coil spring 72 is twisted between the support shaft 50 and the spring connecting member 78. The spring connecting member 78 and the take-up shaft 40 are urged in the opposite direction to the support shaft 50 by a force for returning the twist of the coil spring 72 to the original state. This urging force acts as a force for winding the window shade 30.

  The elastic tube 76 is a member formed of an elastomer such as rubber, and is formed in a cylindrical member that covers the coil spring 72. The elastic tube 76 is formed in a length dimension that is larger than the natural length of the coil spring 72.

  An annular groove 52g is formed at a position intermediate from the portion of the support shaft 50 to which the coil spring 72 is connected (see FIG. 7), and an elastic ring 72r formed of an elastomer such as rubber is formed in the annular groove 52g. Positioning is fixed. The spring connecting member 78 is formed with a step 78s facing the coil spring 72 between a portion where the spline groove 78a is formed and a portion where the coil spring 72 is connected. In a state where the elastic tube 76 is externally fitted to the coil spring 72, both ends of the elastic tube 76 are externally fitted to one end of the spring connecting member 78 and the end of the support shaft 50 on the side where the coil spring 72 is connected, It is disposed between the step 78s and the elastic ring 72r. The elastic tube 76 is regulated so as to be positioned between the stepped portion 78s and the elastic ring 72r. The elastic tube 76 has a role of suppressing abnormal noise due to contact between the coil spring 72 and the shaft main body 41.

  The one end side portion of the vehicle window shade device 20, that is, the portion on the support shaft 60 side will be described.

  As shown in FIGS. 4, 6, and 8, the support shaft 60 is configured to support one end portion of the winding shaft 40 so as to be rotatable and movable along the axial direction thereof.

  More specifically, the support shaft 60 is formed as a rod-shaped member made of resin. The support shaft 60 is connected to the winding shaft 40 so as not to rotate relative to the winding shaft 40, and rotates together with the winding shaft 40. In this respect, the support shaft 60 is an interlocking support shaft. Here, one end portion of the support shaft 60 is provided with a shaft insertion portion 61 having a spline groove 61a formed on the outer periphery. Then, when the shaft insertion portion 61 of the support shaft 60 is inserted into one end portion of the shaft main body portion 41 through the shaft connection receiving member 43, the spline groove 61a becomes a groove on the inner peripheral portion of the shaft connection reception member 43. Fit together. As a result, the support shaft 60 is connected to the shaft body 41 via the shaft connection receiving member 43 so as not to rotate relative to the shaft body 41 and to move along the axial direction. In addition, the structure which connects the support shaft 60 with respect to the shaft main-body part 41 so that relative rotation is impossible is not restricted to the said example, For example, even if it is a structure fitted to the groove | channel formed in the inner peripheral part of the shaft main-body part 41. Good.

  Further, a portion of the support shaft 60 on the other end side of the shaft insertion portion 61 is formed in a shaft portion 62 whose outer peripheral shape of the cross section is circular. The support shaft 60 is rotatably supported by the shaft support portion 64 via the shaft portion 62.

  The shaft support portion 64 is a member that can be fixed to one end portion of the case 46 by screws or the like. The support shaft 60 is inserted through the shaft support portion 64 so as to rotatably support the winding shaft 40.

  Here, the shaft support portion 64 is formed as a plate-like member capable of closing the opening on the one end side of the case 46, similarly to the shaft support portion 54. More specifically, the shaft support portion 64 is formed in a plate shape in which the protruding plate portion 64b protrudes from the outer peripheral portion of the disc portion 64a (see FIG. 8). The disc part 64a is formed in a plate-like part capable of closing the other end of the cylindrical part 47, and the projecting plate part 64b is formed in a plate-like part capable of closing one end side opening of the pair of flange parts 48. Yes. An insertion hole 64h through which the shaft portion 62 of the support shaft 60 can be rotatably inserted is formed in the central portion of the disc portion 64a. Further, a screw retaining piece 64c having a screw insertion hole is provided on the outer peripheral portion of the shaft support portion 64 so as to project. Then, with the shaft support portion 64 disposed so as to close the opening on the one end side of the case 46, the screw S is inserted into the screw stop piece 64c and screwed into the screw stop portion 45 of the case 46, The shaft support 64 is fixedly attached to one end of the case 46. In this state, the shaft portion 62 of the shaft support portion 64 is disposed in the insertion hole 64h. Thereby, the one end part of the winding shaft 40 is rotatably supported within the cylindrical part 47.

  That is, the support shaft 60 can be rotated together with the take-up shaft 40 and moved in the axial direction with respect to the take-up shaft 40 by inserting the shaft insertion portion 61 into the shaft connection receiving member 43. The support shaft 60 is configured to rotatably support the winding shaft 40 by inserting the shaft portion 62 into the insertion hole 64 h of the shaft support portion 64.

  The other end portion of the support shaft 60 protrudes from the outer surface of the shaft support portion 64, and an attachment piece 64 d for attaching the transmission mechanism 80 protrudes from the outer surface of the shaft support portion 64. A transmission mechanism 80 is provided in these portions.

  The transmission mechanism 80 includes a relay transmission member 94, and is configured to convert the rotary motion of the winding shaft 40 into a linear motion and move the winding shaft 40 in the axial direction thereof.

  More specifically, the transmission mechanism 80 includes a shaft side bevel gear 81 as a first gear, a rack bevel gear 82 as a second gear, and a third gear 83 in addition to the relay transmission member 94. These parts are assembled in housings 98 and 99 fixed to the outer surface side of the support shaft 60.

  The relay transmission member 94 is formed as a long member, is disposed along the axial direction of the winding shaft 40, and is formed to be movable together with the winding shaft 40. More specifically, the relay transmission member 94 is a member formed of resin or the like, and has a long rod-like main body portion 95 and a shaft coupling portion 96 provided at one end portion of the main body portion 95. ing. Here, the main body 95 is formed in a square bar shape, and a rack gear portion 95a is formed on one side thereof. The rack gear portion 95 a is configured by a plurality of gear teeth formed along the longitudinal direction of the main body portion 95. Further, the shaft connecting portion 96 is formed in a shape extending from one end portion of the main body portion 95 to the side thereof, and an arc-shaped concave portion 96a is formed at the distal end portion thereof (see FIG. 8). The arc-shaped recess 96a has an arc-shaped portion having a radius of curvature corresponding to the outer periphery radius of the groove portion of the annular groove 44a. The thickness dimension of the shaft connecting portion 96 is set to be the same (substantially the same) as the groove width of the annular groove 44a. Then, by fitting the arc-shaped recess 96a into the annular groove 44a, the shaft connecting portion 96 can be rotated with respect to the take-up shaft 40 while the take-up shaft 40 is rotatable with respect to the shaft connecting portion 96. They are connected in a state where the position is restricted in the axial direction.

  In the housings 98 and 99, an accommodation space for supporting the main body 95 movably along the longitudinal direction of the winding shaft 40 is formed outside the case 46. By means of the housings 98 and 99, the relay transmission member 94 arranges the main body portion 95 along the outer periphery of the case 46, and arranges the shaft coupling portion 96 in the case 46 through the transmission slit 47S of the case 46. In the installed state, it is supported so as to be movable along the longitudinal direction of the winding shaft 40.

  The shaft side bevel gear 81 is rotatably arranged in conjunction with the support shaft 60. Here, the shaft-side bevel gear 81 is directly connected and fixed to the outer end portion of the support shaft 60 so as to rotate integrally with the support shaft 60 as a member integrated with the support shaft 60. It has become. Here, the shaft-side bevel gear 81 is formed separately from the support shaft 60 and is fixed to the support shaft 60 later from the necessity in the work process for inserting the support shaft 60 into the insertion hole 64h. However, these may be integrally formed from the beginning with a resin or the like. Further, another spur gear, a transmission belt, or the like may be interposed between the support shaft 60 and the shaft side bevel gear 81. That is, the shaft side bevel gear 81 only needs to be provided so as to rotate in conjunction with the support shaft 60.

  The rack-side bevel gear 82 is configured as a bevel gear that can mesh with the shaft-side bevel gear 81 and has a rotation axis that is orthogonal to the shaft-side bevel gear 81. That is, the shaft side bevel gear 81 and the rack side bevel gear 82 mesh with each other at an axial angle of 90 degrees. Here, the reference cone angle of the rack-side bevel gear 82 is larger than the reference cone angle of the shaft-side bevel gear 81. Further, the rack side bevel gear 82 has more teeth than the shaft side bevel gear 81. The rack-side bevel gear 82 is disposed between the shaft-side bevel gear 81 and the relay transmission member 94 so as to be rotatable around a rotation axis orthogonal to the rotation axis of the shaft-side bevel gear 81. It is arranged so that it can be meshed from one side.

  Note that the shaft-side bevel gear 81 and the rack-side bevel gear 82 only need to mesh with each other at an axial angle of 90 degrees. For example, a crown gear and a spur gear may be used.

  The third gear 83 is provided so as to be able to mesh with the rack gear portion 95 a and to rotate in conjunction with the rack side bevel gear 82. Here, the third gear 83 is configured as a spur gear that has the same rotational axis as the rack-side bevel gear 82 and is integrated with the rack-side bevel gear 82. The third gear 83 has fewer teeth than the rack side bevel gear 82. The third gear 83 is disposed on the large-diameter side portion of the rack-side bevel gear 82 so as to be able to mesh with the rack gear portion 95 a of the relay transmission member 94. Note that another spur gear, a transmission belt, or the like may be interposed between the rack side bevel gear 82 and the third gear 83. That is, the third gear 83 may be rotated in conjunction with the rotation of the rack side bevel gear 82. The size of the gear, the number of teeth, and the like are examples, and may be appropriately designed according to the relationship between the amount of rotation and the amount of movement of the shaft.

  The shaft-side bevel gear 81, the rack-side bevel gear 82, and the third gear 83 are disposed in housing spaces of housings 98 and 99 formed of resin or the like. Further, the pin P1 is inserted into the shaft side bevel gear 81, and the pin P2 is also inserted into the rack side bevel gear 82 and the third gear 83, and these pins P1 and P2 are the joint portions between the housings 98 and 99. By being fitted in a recess formed in the same manner, the rotor is supported so as to be rotatable at the position and posture described above.

  The housings 98 and 99 are maintained in a united state using screws S, and are attached and fixed to the shaft support portion 64.

  The operation of the vehicle window shade device 20 configured as described above will be described.

  First, in the initial state, the window shade 30 is completely wound around the winding shaft 40, and the entire window 10 is exposed (see FIGS. 1, 4 and 5). In this state, the winding shaft 40 exists at a position away from the one side frame portion 14a. Here, one end portion of the take-up shaft 40 reaches one end portion of the case 46, and the relay transmission member 94 is extended from the one end side of the case 46.

  When the window shade 30 is pulled out along the window 10 from the initial state, the winding shaft 40 is rotated along with the pulling out. Then, the shaft side bevel gear 81 rotates together with the support shaft 60. As a result, the rack-side bevel gear 82 that meshes with the shaft-side bevel gear 81 rotates, and the third gear 83 rotates together with the rack-side bevel gear 82. The relay transmission member 94 moves toward the other end side of the winding shaft 40 by meshing the third gear 83 with the rack gear portion 95a. Then, the relay transmission member 94 allows the winding shaft 40 to rotate while the relay transmission member 94 permits the rotation of the winding shaft 40 due to the connection between the shaft coupling portion 96 of the relay transmission member 94 and the annular groove 44a. Move (see FIGS. 2, 9 and 10). And the winding shaft 40 is located in the intermediate part of case 46, and the window shade 30 will be in the state pulled out to the up-down direction intermediate part of the window 10. FIG.

  When the window shade 30 is further pulled out along the window 10, the winding shaft 40 is further rotated along with the drawing. The winding shaft 40 is further moved to one side frame portion 14a side by meshing of the shaft side bevel gear 81, the rack side bevel gear 82, the third gear 83, and the rack gear portion 95a (FIGS. 3, 11, and 12). reference). The take-up shaft 40 reaches the other end of the case 46 and is located near the shaft support 54. In this state, the window shade 30 is pulled out so as to cover almost the whole of the window 10, and the stay 32 at the leading end side in the pulling direction is attached to the upper frame portion 14c, so that the window shade 30 is maintained in the pulled-out state. Is done.

  The rotational movement of the take-up shaft 40 is transmitted at a reduced speed through the shaft side bevel gear 81, the rack side bevel gear 82, the third gear 83, and the rack gear portion 95a. Thus, the winding shaft 40 is set to move from one end portion of the case 46 to the other end portion.

  When the window shade 30 is pulled out as described above, the winding shaft 40 is relatively rotated with respect to the support shaft 50, so that the spring connecting member 78 is attached to the winding shaft 40 so as not to be relatively rotatable. The coil spring 72 is twisted between the support shaft 50 and the coil spring 72. Accordingly, when the force for pulling out the window shade 30 is released, the winding shaft 40 is rotated in the winding direction of the window shade 30 by the force for eliminating the twist of the coil spring 72, and the window shade 30 is rotated. Rolled up. At this time, when the transmission mechanism 80 operates in the opposite direction, the take-up shaft 40 moves in the opposite direction and returns to the initial position.

  Further, along with the movement of the winding shaft 40, the bearing 42 on the winding shaft 40 side moves with the support shaft 50 as an axis. At this time, since the elastic tube 76 is restricted so as to be positioned between the step 78s and the elastic ring 72r, the state of covering the coil spring 72 is more reliably maintained.

  According to the vehicle window shade device 20 configured as described above, when the winding shaft 40 is rotated, the rotational motion is converted into a linear motion via the transmission mechanism 80 and transmitted to the winding shaft 40. Thus, the winding shaft 40 can be moved in the axial direction along with the rotation thereof. Thereby, when the winding shaft 40 is disposed along the edge portion 12a which is the first frame portion, one side frame portion which is the second frame portion which is inclined with respect to the edge portion 12a. It is possible to make the gap between the side edge portion on the side frame portion 14a side of the window shade 30 as small as possible.

  At this time, the take-up shaft 40 is moved in the axial direction via the relay transmission member 94. Specifically, the rotational movement of the winding shaft 40 is transmitted via the relay transmission member 94 having the shaft-side bevel gear 81, the rack-side bevel gear 82, the third gear 83, and the rack gear portion 95a. As a linear motion, the winding shaft 40 is moved along its axial direction. For this reason, it is not necessary to form a screw groove etc. in support shafts 50 and 60 grade. For this reason, the support strength of the winding shaft 40 can be improved.

  Thereby, sufficient strength can be obtained even if the support shafts 50 and 60 are made of resin. And the weight reduction etc. can be achieved by forming the support shafts 50 and 60 with resin.

  Further, since the support shaft 60 is connected to the winding shaft 40 so as to be movable in the axial direction, the support shaft 60 is fixed along the axial direction regardless of the movement of the winding shaft 40 in the axial direction. Can be arranged in position. Thereby, the support shaft 60 and the shaft side bevel gear 81 can be integrated, and the transmission mechanism 80 having the shaft side bevel gear 81 can be easily configured.

  Further, the winding shaft 40 is formed with an annular groove 44a, and the relay transmission member 94 is formed with an arcuate recess 96a that fits into the annular groove 44a, so that the winding shaft 40 is rotated with respect to the relay transmission member 94. The relay transmission member 94 and the winding shaft 40 can be easily connected so that the winding shaft 40 can be moved along the axial direction by the relay transmission member 94 while enabling.

  As described above, the present invention has been described in detail. However, the above description is illustrative in all aspects, and the present invention is not limited thereto. It is understood that countless variations that are not illustrated can be envisaged without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Window 20 Vehicle window shade apparatus 30 Window shade 40 Winding shaft 41 Shaft body part 42 Bearing 43 Shaft connection receiving member 46 Case 50, 60 Support shaft 54 Shaft support part 61a Spline groove 62 Shaft part 64 Shaft support part 64h Insertion hole DESCRIPTION OF SYMBOLS 70 Energizing mechanism 80 Transmission mechanism 81 Shaft side bevel gear 82 Rack side bevel gear 83 Third gear 94 Relay transmission member 95 Main body part 95a Rack gear part 96 Shaft connection part 96a Arc-shaped recessed part

Claims (4)

A vehicle window shade device for covering and releasably covering a window,
A window shade capable of shielding the window;
A winding shaft capable of winding the window shade;
A pair of support shafts for supporting the winding shaft so as to be rotatable and movable along the axial direction;
An urging mechanism that urges the winding shaft in a direction in which the window shade is wound;
A relay transmission member formed in a long member disposed along the axial direction of the winding shaft and movable along with the winding shaft along the axial direction of the winding shaft; A transmission mechanism that converts the rotational motion of the shaft into a linear motion and moves the winding shaft in its axial direction;
A vehicle window shade device. The vehicle window shade device according to claim 1,
One of the pair of support shafts is an interlocking support shaft that can rotate together with the winding shaft,
The relay transmission member has a rack gear portion,
The transmission mechanism has a first gear that is rotatably arranged in conjunction with the interlocking support shaft, and a first rotation shaft that can mesh with the first gear and is orthogonal to the first gear. 2 further comprising a gear and a third gear rotatably provided in association with the rack gear portion component engageable with a and the second gear,
Vehicle window shade device. The vehicle window shade device according to claim 2,
The interlocking support shaft is movable in the axial direction with respect to the winding shaft;
The vehicle window shade device, wherein the first gear is a member integrated with the interlocking support shaft. The vehicle window shade device according to any one of claims 1 to 3,
An annular groove is formed in the winding shaft,
The relay transmission member has a shaft coupling portion having an arcuate recess that fits into the annular groove,
In a state where the winding shaft is rotatable with respect to the shaft coupling portion and the shaft coupling portion is positioned in the axial direction with respect to the winding shaft, the shaft coupling portion is formed in the annular groove. A window shade device for a vehicle that is fitted.

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