Vehicular shade device

Abstract

To provide a vehicular shade device that can be made compact in a height direction and enables a movable range of a shade to be easily expanded.SOLUTION: A vehicular shade device comprises: a shade; a winding-up member that winds up the shade; a winding-around member that can rotate concentrically and integrally with the winding-up member; a first string that is fixed to the winding-around member and is wound around the winding-around member; a second string that is connected to a tip part of the shade; and a driving device. The driving device rotates a single drum member in a first direction, and while feeding out either of the first and the second strings from the winding-up groove of the drum member, winds up the other of the first and the second strings to a winding-up groove getting empty, and rotates the drum member in a second direction that is the opposite direction to the first direction, and winds up either of the first and the second strings to the winding-up groove getting empty while feeding out the other of the first and the second strings from the winding-up groove.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present disclosure relates to a shade device for a vehicle that is provided on a roof of a vehicle. [Background technology]

[0002] Conventionally, a roll shade device including a shading sheet (shade), a winding roller around which the shading sheet is wound so as to be able to be wound up and pulled out, and a pair of guide frames is known (see, for example, Patent Document 1). In this roll shade device, a garnish (shade bar) extending along the edge of the pull-out side of the shading sheet is connected to the edge, and a runner portion that can slide back and forth along the corresponding guide frame is provided at both ends of the garnish. The runner portion is connected to a geared cable, and the geared cable meshes with a drive gear that is driven to rotate by a motor. In addition, the winding roller has a built-in biasing mechanism including a spring or the like, and the shading sheet is constantly biased toward the winding side by the biasing mechanism. When the motor is rotated in one direction, the geared cable moves the runner portion so as to separate from the winding roller. As a result, the shading sheet is pulled out from the winding roller against the biasing force from the biasing mechanism, and the shading sheet is in a fully closed state. When the motor is rotated in the reverse direction, the geared cable moves the runner so that it approaches the take-up roller, causing the light shielding sheet to be wound up by the take-up roller due to the biasing force from the biasing mechanism, and the light shielding sheet is brought into a fully open state. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-216124 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional roll shade device, the outer diameter of the winding roller becomes large due to the built-in biasing mechanism, making it difficult to reduce the height dimension, and thus the mountability is deteriorated. In addition, in the roll shade device, it is necessary to regulate the path of the geared cable by a guide frame, but since losses due to frictional resistance and the like increase, it becomes difficult to downsize the motor that drives the geared cable and make the entire device compact. Furthermore, when expanding the movable range (shading area) of the shading sheet, the size of the springs and the like of the biasing mechanism must be increased to relieve the stress of the springs and the like, and the mountability of the roll shade device is deteriorated due to the increase in size of the biasing mechanism and the winding roller.

[0005] Therefore, a primary object of the present disclosure is to provide a shade device for a vehicle that is compact in height and can easily expand the movable range of the shade. [Means for solving the problem]

[0006] The vehicle shade device disclosed herein includes a shade and a winding member that winds up the shade, and is provided on the roof of a vehicle. The vehicle shade device includes a winding member that is coaxial with and can rotate integrally with the winding member, a first string that is fixed to the winding member and wound around the winding member, a second string that is connected to the tip of the shade, a single drum member that has a winding groove formed on its outer circumferential surface so as to extend spirally around an axis and is rotatable around the axis, and a rotational drive source that rotates the drum member in forward and reverse directions around the axis, and a drive device that rotates the drum member in a predetermined first direction and unwinds one of the first and second strings from the winding groove while winding the other of the first and second strings into the emptied winding groove, and rotates the drum member in a second direction opposite to the first direction, and unwinds the other of the first and second strings from the winding groove while winding one of the first and second strings into the emptied winding groove.

[0007] The vehicle shade device of the present disclosure includes a winding member, first and second strings, and a drive device. The winding member is coaxial with and can rotate integrally with a winding member that winds up the shade. A first string such as a thin wire or thread is fixed to the winding member, and the first string is wound around the winding member. A second string such as a thin wire or thread is connected to the tip of the shade. The drive device includes a single drum member that has a winding groove formed on its outer circumferential surface so as to extend spirally around the axis and is rotatable around the axis, and a rotary drive source that rotates the drum member in forward and reverse directions around the axis. The drive device rotates the drum member in a predetermined first direction, and while one of the first and second strings is unwound from the winding groove, the other of the first and second strings is wound around the emptied winding groove. Furthermore, the driving device rotates the drum member in a second direction opposite to the first direction, and winds one of the first and second strings into the vacant winding groove while unwinding the other of the first and second strings from the winding groove. As a result, the driving device winds the first string into the winding groove of the drum member and rotates the winding member and the winding member in the winding direction of the shade, so that the shade can be wound up on the winding member and opened. Furthermore, the driving device winds the second string into the winding groove of the drum member and separates the tip of the shade from the winding member, so that the shade can be pulled out from the winding member and closed. Therefore, the biasing mechanism (retractor) that biases the shade in the winding direction can be omitted from the winding member, and the diameter of the winding member can be reduced. Furthermore, by adopting a configuration in which the first string is wound up on the drum member to open the shade, the movable range of the shade is not limited by the constraints of the biasing mechanism. Furthermore, when the single drum member rotates in the first or second direction, the second or first string is unwound from the spirally extending winding groove of the drum member, and the first or second string is wound into the vacant winding groove accordingly. This allows the winding groove of the single drum member to be shared by the first and second strings, making it possible to reduce the height of the drum member.As a result, the vehicle shade device can be made compact in the height direction, improving the mountability of the vehicle shade device, and the movable range of the shade can be easily expanded. In addition, the omission of the biasing mechanism makes it possible to reduce the weight and cost of the entire device. Furthermore, the structure for regulating the paths of the first and second strings can be made lower in height and simpler than a geared cable, etc., thereby making it possible to make the entire device more compact. In addition, the loss associated with driving the first and second strings is also reduced compared to a geared cable, etc., so that the size of the drive device can be suppressed. In addition, by making the drum member and the rotary drive source into one each, the number of parts of the drive device can be reduced, thereby reducing costs, and the drive device and therefore the vehicle shade device can be made smaller and lighter. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view showing a main part of a vehicle including a vehicle shade device according to the present disclosure. [Diagram 2] 1 is an exploded perspective view showing a vehicle shade device according to the present disclosure; [Diagram 3] 1 is an enlarged cross-sectional view showing a vehicle shade device according to the present disclosure. [Figure 4] 2 is a perspective view showing a drum member included in the vehicle shade device of the present disclosure. FIG. [Diagram 5] 2 is a side view showing a drum member included in the vehicle shade device of the present disclosure. FIG. [Figure 6] 2 is a plan view showing a drum member included in the vehicle shade device of the present disclosure. FIG. [Figure 7] 2 is a schematic diagram showing a drum member included in the vehicle shade device of the present disclosure. FIG. [Figure 8] 4 is a schematic configuration diagram for explaining the operation of the vehicle shade device of the present disclosure. FIG. [Figure 9] 5A to 5C are schematic diagrams for explaining the operation of the vehicle shade device of the present disclosure. [Figure 10] 4 is a schematic configuration diagram for explaining the operation of the vehicle shade device of the present disclosure. FIG. [Figure 11] 4 is a plan view showing an example of a first slack absorbing mechanism included in the vehicle shade device of the present disclosure. FIG. [Figure 12] 12 is a rear view showing the first slack absorbing mechanism of FIG. 11. [Figure 13] 1 is an explanatory diagram showing a winding member included in a vehicle shade device of the present disclosure. [Figure 14] 11 is a schematic configuration diagram showing an example of a second slack absorbing mechanism included in the vehicle shade device of the present disclosure. FIG. [Figure 15] 15 is a partial cross-sectional view showing the second slack absorbing mechanism of FIG. 14. [Figure 16] 15 is a schematic diagram for explaining the operation of the second slack absorbing mechanism of FIG. 14. FIG. [Figure 17] 13 is a schematic configuration diagram showing another example of the first slack absorbing mechanism included in the vehicle shade device of the present disclosure. FIG. [Figure 18] 18 is a cross-sectional view taken along the line AA in FIG. 17. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Next, an embodiment of the present disclosure will be described with reference to the drawings.

[0010] FIG. 1 is a perspective view showing a vehicle V including a shade device for a vehicle (hereinafter simply referred to as a "shade device") 1 of the present disclosure. The vehicle V includes a sunroof device SR provided between a front roof panel Rf and a rear roof panel Rr fixed to a vehicle body F. The shade device 1 is attached to the vehicle body F so as to be located below a transparent movable panel Pm and a transparent fixed panel Pf of the sunroof device SR. However, the shade device 1 may also be attached to the vehicle body F so as to be located below a fixed transparent roof (glass roof) provided between the front roof panel Rf and the rear roof panel Rr.

[0011] As shown in Fig. 2, the shade device 1 includes a shade 2, a winding member 3, a shade bar 4, a pair (two) of shoes 5, a pair (two) of guide members 6, and a drive device 10 for opening and closing the shade 2. The shade 2 is, for example, a rectangular light-shielding sheet made of cloth, and has an area sufficient to completely cover the light-transmitting parts of the movable panel Pm and the fixed panel Pf of the sunroof device SR. The shade 2 may also have heat-shielding properties.

[0012] The winding member 3 is a cylinder having a relatively small outer diameter (for example, about 10-15 mm), and the base end of the shade 2 is fixed (locked) to the outer circumferential surface of the winding member 3. However, the winding member 3 may be a cylindrical body. In addition, one spool (winding member) 30 having a substantially conical shape (frustum shape) is coaxially fixed to one end of the winding member 3 in the axial direction (in this embodiment, the end on the left side of the vehicle V). In this embodiment, the spool 30 is fixed to the winding member 3 so that the large diameter side (bottom side) is located on the winding member 3 side, and can rotate coaxially and integrally with the winding member 3. The shade 2 can be wound up on the winding member 3 and opened by rotating the winding member 3 and the spool 30 around their axis centers As (see Figs. 11 and 12) in a predetermined winding direction. Further, on the outer circumferential surface of the spool 30, a winding groove 31 (see FIGS. 11 and 12) is formed which extends spirally around the axis As of the spool 30.

[0013] The shade bar 4 is formed hollow by extruding, for example, an aluminum alloy. The shade bar 4 is fixed to the tip end of the shade 2 (the end opposite to the base end fixed to the winding member 3). In this embodiment, a cylindrical portion is formed at the tip end of the shade 2 into which a rod is inserted. The cylindrical portion and the rod are fitted into a shade holding groove 4g (see FIG. 15) formed in the shade bar 4, thereby fixing the shade bar 4 to the tip end of the shade 2. In this embodiment, each shoe 5 is formed from, for example, a resin containing potassium titanate fiber, and is fitted (fixed) to the corresponding end in the longitudinal direction of the shade bar 4.

[0014] Each guide member 6 is formed by extruding an aluminum alloy or the like, and has a uniform cross-sectional shape in the longitudinal direction. Each guide member 6 slidably supports the corresponding shoe 5 and the corresponding side end portion 20 (see FIG. 3) of the shade 2. The pair of guide members 6 are fixed to the housing 7 and the support member 8 via bolts or the like so as to extend parallel to each other at an interval corresponding to the width of the shade 2. The housing 7 accommodates the drive unit 10. In addition, a pair of brackets 9 (see FIGS. 11 and 12) are fixed to the support member 8, which rotatably support the shaft portion of the spool 30 or the end portion of the winding member 3 via bearings (not shown). The housing 7 and the support member 8 are fixed to the vehicle body F below the sunroof device SR so that the winding member 3 extends in the width direction of the vehicle V and the pair of guide members 6 extend in the front-rear direction of the vehicle V. In this embodiment, the housing 7 is located on the front side of the vehicle V, and the support member 8 is located on the rear side of the vehicle V.

[0015] FIG. 3 is an enlarged cross-sectional view showing the shade 2, the shade bar 4, the shoe 5, and the guide member 6. As shown in the figure, solidified portions 21 are formed on both side end portions 20 in the width direction of the shade 2 (extension direction of the winding member 3 and the shade bar 4). The solidified portions 21 are formed by applying resin to the entire edge of the side end portion 20 or by attaching a sheet material such as resin, and have a higher strength than the remaining side end portion 20 (shade 2). The solidified portions 21 are folded back so as to cover the remaining side end portion 20 from above, and are sewn to the remaining side end portion 20 at least at one point in the longitudinal direction. In addition, the base portion 4b of the shade bar 4 abuts against the upper surface of the shade 2.

[0016] As shown in FIG. 3, each shoe 5 includes a fitting portion 50 that fits into the end of the shade bar 4 in the corresponding axial direction, and a supported portion 51 that is slidably supported by the corresponding guide member 6. The supported portion 51 also has an insert portion (pilot portion) 52 that protrudes on the side opposite to the fitting portion 50. The insert portion 52 is a thin plate-like protruding piece that is narrower than the supported portion 51. When the fitting portion 50 is fitted into the end of the shade bar 4, the supported portion 51 of each shoe 5 protrudes outward from the shade bar 4, and the supported portion 51 and the insert portion 52 abut against the upper surface of the side end portion 20 of the shade 2. Furthermore, the insert portion 52 is inserted into the side end portion 20 of the folded back shade 2, i.e., below the solidified portion 21.

[0017] Each guide member 6 has a guide chamber 60 that extends in the longitudinal direction (the direction penetrating the paper in FIG. 3) and opens on one side in the width direction (the left-right direction in FIG. 3). The pair of guide members 6 are fixed to the housing 7 and the support member 8 so that the openings of the guide chambers 60 face each other. Furthermore, each guide member 6 has a first protrusion 61, a second protrusion 62, and a third protrusion 63 that extend in the longitudinal direction. The first protrusion 61 protrudes from the inner surface of the upper side of the guide member 6 that defines the guide chamber 60 and faces the inner surface of the lower side of the guide member 6 at a distance.

[0018] As a result, the guide chamber 60 is divided by the first protrusion 61 into a first chamber 60a on the opening side (left side in FIG. 3) and a second chamber 60b on the closed end side (right side in FIG. 3). The second protrusion 62 protrudes from the lower inner surface of the guide member 6 that defines the guide chamber 60 on the closed end side of the first protrusion 61, and faces the upper inner surface of the guide member 6 at a distance. The third protrusion 63 protrudes downward from the upper inner surface of the guide member 6 at the opening of the guide chamber 60, and faces the lower inner surface of the guide member 6 at a distance.

[0019] 3, the supported portion 51 (part of it) and the insert portion 52 of each shoe 5 are inserted into the guide chamber 60 of the corresponding guide member 6 together with the side end portion 20 of the shade 2. More specifically, the insert portion 52 and the side end portion 20 of the shade 2 are supported from above by the first protrusion 61, and are inserted into the second chamber 60b of the guide chamber 60 so that the insert portion 52 is supported from above by the first protrusion 61 and the tip of the side end portion 20, i.e., the solidified portion 21, abuts against the first protrusion 61 or the inner surface of the guide chamber 60. The side end portion 20 of the shade 2 is supported from below by the second protrusion 62 in the second chamber 60b.

[0020] Furthermore, (a part of) the supported portion 51 is disposed in the first chamber 60a of the guide chamber 60 together with the side end portion 20 of the shade 2, and is supported from above by the third protrusion 63. As a result, the supported portion 51 and the insertion portion 52 of each shoe 5 and the side end portion 20 of the shade 2 are slidably supported by the corresponding guide member 6. Also, the step portion formed on the supported portion 51 comes into contact with the third protrusion 63, thereby restricting the movement of the shoe 5 in the direction from the shade bar 4 toward the guide member 6.

[0021] The drive device 10 of the shade device 1 rotates the winding member 3 around the axis As via one first string S1, and separates the tip of the shade bar 4, i.e., the shade 2, from the winding member 3 via one second string S2. As shown in FIG. 1, the drive device 10 includes a single drum member 15, a single motor M as a rotation drive source, and a power transmission mechanism 16. The drum member 15 is formed of resin or the like so as to have a cylindrical outer peripheral surface, and is rotatable, for example, around an axis Ad (see FIG. 4) extending in the vertical direction. As shown in FIGS. 4 and 5, a winding groove 151 is formed on the outer peripheral surface of the drum member 15, extending in a spiral shape around the axis Ad.

[0022] The first string S1 is a wire (made of metal) having an outer diameter of, for example, about 0.8-1.0 mm. However, the first string S1 may be a thread or the like formed of chemical fiber or the like. One end of the first string S1 is fixed (locked) to the large diameter end of the spool 30, and the first string S1 is wound around the winding groove 31 of the spool 30 in the opposite direction to the winding direction. Furthermore, in this embodiment, a first slack absorbing mechanism 70 that absorbs slack in the first string S1 is supported by the bracket 9 on the vehicle rear side of the spool 30, and one end of the first string S1 is fixed to the spool 30 after passing through the first slack absorbing mechanism 70.

[0023] 5, a fixing piece F1 is attached to the other end of the first string S1, and the fixing piece F1 is fitted into a fitting portion formed at a lower end (one end) of the outer circumferential surface of the drum member 15. As a result, the other end of the first string S1 is fixed to the lower end of the outer circumferential surface of the drum member 15. As can be seen from FIG. 5, when the drum member 15 rotates around the axis Ad in a predetermined first direction, the first string S1 is wound around the winding groove 151 from the lower end side (one end side) of the drum member 15 to the upper end side (other end side). The first string S1 protrudes from the winding groove 151 in a tangential direction to the winding groove 151 and outward.

[0024] The second string S2 is a wire (made of metal) having an outer diameter (for example, about 0.6-0.8 mm) smaller than that of the first string S1. However, the second string S2 may also be a thread or the like made of chemical fiber or the like. In this embodiment, the center part of the second string S2 is routed along the upper end surface of the drum member 15 so as to extend (curve) in a substantially S-shape without passing through the axis Ad as shown in FIG. 6, and is fixed to the upper end surface of the drum member 15. That is, a plurality of fixing pieces F2 (two in this embodiment) are attached to the center part of the second string S2, and each fixing piece F2 is fitted into a fitting part formed on the upper end surface of the drum member 15.

[0025] Furthermore, as can be seen from FIG. 6, the one end side portion (portion from the center to one end) and the other end side portion (portion from the center to the other end) of the second string S2 enter the winding groove 151 at different positions in the circumferential direction from the upper end surface of the drum member 15, and are wound up in the winding groove 151 from the upper end side (other end side) of the drum member 15 toward the lower end side (one end side) when the drum member 15 rotates around the axis Ad in a second direction (counterclockwise direction in FIG. 6) opposite to the first direction. In this embodiment, the one end side portion and the other end side portion of the second string S2 are wound up in the winding groove 151 so as to be aligned in the radial direction of the drum member 15 when the drum member 15 rotates around the axis Ad in the second direction, as shown in FIG. 4. Furthermore, the one end side portion and the other end side portion of the second string S2 protrude outward from the winding groove 151 in a tangential direction to the winding groove 151 at different positions in the circumferential direction.

[0026] As shown in Fig. 7, the winding groove 151 of the drum member 15 is a tapered groove formed so that the groove width narrows from the opening side toward the bottom side. The opening length w1 of the winding groove 151 in the axial direction of the drum member 15 is set to be larger than the outer diameter d1 of the first string S1 and smaller than twice the outer diameter d2 of the second string S2. In this embodiment, the winding groove 151 is designed so that the center C1 of the first string S1 wound around the winding groove 151 overlaps with the contact point Cp between the one end side portion and the other end side portion of the second string S2 adjacent in the radial direction of the drum member 15 when viewed from the axial direction of the drum member 15 (see the dashed line in Fig. 7). As a result, the first string S1 is wound into the winding groove 151 without abutting the bottom surface of the winding groove 151, and is positioned closer to the axis Ad of the drum member 15 than one of the radially outermost ends Eo of the one end side and the other end side of the second string S2, which is located radially outward within the winding groove 151.

[0027] One end of the second string S2 is slidably inserted through the first chamber 60a (guide chamber 60) of one guide member 6 and the string passage 55 (see FIG. 3) formed in one of the pair of shoes 5, and reaches the interior space 4x of the shade bar 4 (see FIG. 15). On the other hand, the other end of the second string S2 is slidably inserted through the first chamber 60a (guide chamber 60) of the other guide member 6 and the string passage 55 formed in the other of the pair of shoes 5, and reaches the interior space 4x of the shade bar 4. Then, one end and the other end of the second string S2 are connected to each other in the interior space 4x of the shade bar 4 via a second slack absorbing mechanism 80 that absorbs slack in the second string S2. As a result, one second string S2 is supported by the shade bar 4 and the pair of shoes 5 so as to be slidable in the width direction of the shade 2, and is connected to the tip of the shade 2 via the shade bar 4, etc.

[0028] The motor M of the drive device 10 rotates the drum member 15 in the forward and reverse directions around the axis Ad via the power transmission mechanism 16. In this embodiment, the motor M is, for example, a brushed DC motor, and is controlled by a control device 100 (see FIG. 1). The control device 100 includes a microcomputer having a CPU, ROM, RAM, an input / output interface, and the like, and controls the motor M in response to the operation of a shade opening / closing switch (not shown) by a user. The power transmission mechanism 16 includes, for example, a reducer and a gear mechanism. However, the power transmission mechanism 16 may be omitted, and the motor M may be directly connected to the drum member 15. Furthermore, the shade device 1 includes a plurality of pulleys P (see FIG. 2) rotatably supported by the housing 7 or the like so as to regulate the paths of the corresponding first or second strings S1 and S2.

[0029] Next, the operation of the above-mentioned shade device 1 will be described with reference to FIGS.

[0030] When the shade 2 is pulled out from the winding member 3 and at least partially closed, and a user issues a command to open the shade 2 (fully open or half open) via the shade opening / closing switch, the control device 100 controls the motor M of the drive device 10 to rotate the drum member 15 around the axis Ad in the first direction (clockwise in FIG. 8) as shown in Fig. 8. When the drum member 15 rotates in the first direction, the second string S2 is unwound from the drum member 15 toward one end side and the other end side of the shade bar 4, and the first string S1 is wound onto the drum member 15, as shown in Fig. 8.

[0031] That is, the driving device 10 rotates the drum member 15 in the first direction, and winds the first string S1 from the lower end side to the upper end side of the drum member 15 into the emptied winding groove 151 while unwinding one end side and the other end side of the second string S2 from the winding groove 151, as shown by the dashed line in FIG. 9. As a result, the spool 30 and the winding member 3 rotate around the axis As in the winding direction of the shade 2 in response to the winding of the first string S1 into the winding groove 151. Also, the movement of the shade bar 4 toward the winding member 3 is permitted in response to the unwinding of the second string S2. As a result, while the shade 2 is being wound onto the winding member 3, the shade bar 4 can be moved toward the winding member 3 to open the shade 2.

[0032] On the other hand, when the shade 2 is wound up by the winding member 3 and at least partially open, and the user issues an instruction to close (fully close or half close) the shade 2 via the shade opening / closing switch, the control device 100 controls the motor M of the drive device 10 to rotate the drum member 15 around the axis Ad in the second direction (counterclockwise in FIG. 10) as shown in Fig. 10. When the drum member 15 rotates in the second direction, the first string S1 is unwound from the drum member 15 toward the spool 30, and the portion of the second string S2 between the drum member 15 and one end of the shade bar 4 (the portion of the second string S2 located on the one end side of the shade bar 4) and the portion of the second string S2 between the drum member 15 and the other end of the shade bar 4 (the portion of the second string S2 located on the other end side of the shade bar 4) are wound onto the drum member 15.

[0033] That is, the driving device 10 rotates the drum member 15 in the second direction, and while unwinding the first string S1 from the winding groove 151, winds up the one end side and the other end side of the second string S2 from the upper end side to the lower end side of the drum member 15 into the vacant winding groove 151 so as to be aligned in the radial direction of the drum member 15, as shown by the two-dot chain line in FIG. 9. As a result, the shade bar 4 moves away from the winding member 3 in response to the winding of the second string S2 into the winding groove 151. Then, the shade 2 is pulled out from the winding member 3 in response to the movement of the shade bar 4, and the winding member 3 and the spool 30 rotate around the axis As in the unwinding direction of the shade 2. As a result, the shade 2 is pulled out from the winding member 3 and closed, and the first string S1 can be wound around the spool 30 that rotates together with the winding member 3 in response to the pulling out of the shade 2 (the movement of the shade bar 4).

[0034] Therefore, the biasing mechanism (retractor) for biasing the shade 2 in the winding direction can be omitted from the winding member 3, and the diameter of the winding member 3 can be reduced. In addition, by adopting a configuration in which the first string S1 is wound around the drum member 15 to open the shade 2, the movable range of the shade 2 is not limited by the constraints of the biasing mechanism. Furthermore, when the single drum member 15 rotates in the first or second direction, the second or first string S2, S1 is unwound from the spirally extending winding groove 151 of the drum member 15, and the first or second string S1, S2 is wound around the vacant winding groove 151. As a result, the winding groove 151 of the single drum member 15 is shared by the first and second strings S1, S2, and the drum member 15 can be made low-profile. As a result, the shade device 1 can be made compact in the height direction to improve the mountability of the shade device 1, and the movable range of the shade 2 can be easily expanded.

[0035] Furthermore, the omission of the biasing mechanism allows the weight and cost of the entire device to be reduced. The structure for regulating the paths of the first and second strings S1, S2 can be made lower in height and simpler than a geared cable or the like, which allows the entire device to be made compact. Furthermore, the loss associated with driving the first and second strings S1, S2 is also reduced compared to a geared cable or the like, which prevents the drive device 10 from becoming larger. In addition, by using only one drum member 15 and one motor M, the number of parts of the drive device 10 can be reduced, reducing costs, and the drive device 10 and therefore the shade device 1 can be made smaller and lighter.

[0036] In the shade device 1, the first string S1 is wound around the winding groove 151 from the lower end side to the upper end side in the axial direction of the drum member 15, and the second string S2 is wound around the winding groove 151 from the upper end side to the lower end side in the axial direction of the drum member 15. This makes it possible to wind one of the first and second strings S1, S2 into the winding groove 151 while unwinding the other, without the first and second strings S1, S2 interfering with each other, when the drum member 15 is rotated in the first or second direction.

[0037] Furthermore, a shade bar 4 having an internal space 4x is fixed to the tip of the shade 2. The second string S2 is inserted into the internal space 4x from one end side and the other end side of the shade bar 4. Furthermore, the part of the second string S2 between the drum member 15 and one end of the shade bar 4 and the part of the second string S2 between the drum member 15 and the other end of the shade bar 4 are wound up in the winding groove 151 so as to be aligned in the radial direction of the drum member 15. This makes it possible to wind up both the part of the second string S2 between the drum member 15 and one end of the shade bar 4 and the part of the second string S2 between the drum member 15 and the other end of the shade bar 4 on the drum member 15 while keeping the height of the drum member 15 low. In addition, in the shade device 1, by winding the second string S2 on the drum member 15, the shade bar 4 can be moved straight without tilting, allowing the shade 2 to be opened and closed smoothly.

[0038] In the shade device 1, the outer diameter d2 of the second string S2 is set to be smaller than the outer diameter d1 of the first string S1. The first string S1 is wound into the winding groove 151 so as to be located closer to the axis Ad of the drum member 15 than the outermost end Eo in the radial direction of one of the following: a portion of the second string S2 wound into the winding groove 151 from between the drum member 15 and one end of the shade bar 4, and a portion of the second string S2 wound into the winding groove 151 from between the drum member 15 and the other end of the shade bar 4.

[0039] This makes it possible to reduce the difference between the moving speed (circumferential speed) of the second string S2 between the drum member 15 and one end of the shade bar 4 and the moving speed (circumferential speed) of the second string S2 between the drum member 15 and the other end of the shade bar 4 when the drum member 15 is rotated in the first or second direction. As a result, when the first string S1 is wound onto the drum member 15, the shade 2 can be opened smoothly while preventing the second string S2 from becoming loose, and when the second string S2 is wound onto the drum member 15, the first string S1 can be wound onto the spool 30 while preventing the first string S1 from becoming loose.

[0040] Furthermore, in the shade device 1, the opening length w1 of the winding groove 151 in the axial direction of the drum member 15 is set to be larger than the outer diameter d1 of the first string S1 and smaller than twice the outer diameter d2 of the second string S2. This prevents the second string S2 from lining up in the axial direction of the drum member 15 within the winding groove 151, and enables the first string S1 to be smoothly wound into the winding groove 151.

[0041] Moreover, in the shade device 1, the winding groove 151 is formed such that, as viewed from the axial direction of the drum member 15, the center C1 of the first string S1 wound around the winding groove 151 overlaps with a contact point Cp between a portion of the second string S2 wound around the winding groove 151 from between the drum member 15 and one end of the shade bar 4 and a portion of the second string S2 wound around the winding groove 151 from between the drum member 15 and the other end of the shade bar 4. This makes it possible to make the absolute value of the moving speed of the first string S1 approximately equal to the average value (absolute value) of the moving speed of the second string S2 between the drum member 15 and one end of the shade bar 4 and the moving speed of the second string S2 between the drum member 15 and the other end of the shade bar 4 when the drum member 15 is rotated in the first or second direction.

[0042] Furthermore, in the shade device 1, the winding groove 151 is formed so that the groove width narrows from the opening side toward the bottom side. This makes it possible to wind the first and second strings S1, S2 into the winding groove 151 so that the center C1 of the first string S1 and the contact point Cp between the one end side portion and the other end side portion of the second string S2 adjacent in the radial direction of the drum member 15 overlap when viewed from the axial direction of the drum member 15.

[0043] Here, the shade 2 and the first and second strings S1, S2 stretch due to changes in the ambient temperature and application of a tensile load. When at least one of the shade 2 and the first and second strings S1, S2 stretches, the correlation between the amount of movement of the first and second strings S1, S2 (the amount of winding around the drum member 15) and the amount of movement of the shade 2 breaks down, and at least one of the first and second strings S1, S2 may become loose.

[0044] For example, when the shade 2 is stretched, even if the second string S2 is wound around the drum member 15 by a specified amount to close the shade 2, the shade 2 is pulled out from the winding member 3 after the slack caused by the stretch is eliminated. Therefore, the shade 2 is not pulled out from the winding member 3 by an amount corresponding to the specified amount, and the rotation of the winding member 3 and the spool 30 is insufficient, causing slack in the first string S1. Also, when the shade 2 is stretched, even if the first string S1 is wound around the drum member 15 by a specified amount to open the shade 2, the shade 2 is wound around the winding member 3 after the slack caused by the stretch is eliminated. Therefore, the shade 2 is not wound around the winding member 3 by an amount corresponding to the specified amount, and the movement of the shade 2 is insufficient, causing slack in the second string S2. Furthermore, when the first string S1 or the second string S2 is stretched, the first string S1 and the like become slack between the drum member 15 and the spool 30 and the like.

[0045] If the slack in the first and second strings S1, S2 exceeds the allowable amount, the shade 2 cannot be moved properly by winding the first or second string S1, S2 around the drum member 15, and in some cases, the first and second strings S1, S2 may come off the pulley P. In consideration of this, the shade device 1 is provided with a first slack absorbing mechanism 70 that absorbs the slack in the first string S1 that occurs between the drum member 15 and the spool 30, and a second slack absorbing mechanism 80 that absorbs the slack in the second string S2 that occurs between the drum member 15 and the tip of the shade 2 within the internal space 4x of the shade bar 4.

[0046] FIG. 11 is a plan view showing the first slack absorbing mechanism 70, and FIG. 12 is a rear view showing the first slack absorbing mechanism 70. As shown in these drawings, the first slack absorbing mechanism 70 includes a pulley 71 around which the first string S1 is wound, a support member 72 that supports the pulley 71, and a biasing member 73. The pulley 71 has an outer diameter that is approximately equal to the outer diameter of the large diameter side of the spool 30, for example. The support member 72 is disposed on the opposite side of the spool 30 fixed to the winding member 3 of the shade 2 from the drum member 15 side, that is, on the vehicle rear side (rear) of the spool 30. As shown in FIG. 11 and FIG. 12, the support member 72 includes a base end portion 72a, a pulley support portion 72b, and an arm portion 72c.

[0047] The base end 72a of the support member 72 is supported by the bracket 9 so as to be rotatable around an axis extending in a direction perpendicular to the bottom surface of the bracket 9 (up and down direction). The pulley support part 72b is formed in a disk shape having an outer diameter approximately equal to the outer diameter of the pulley 71, and extends obliquely upward from the base end 72a. The arm part 72c extends from the pulley support part 72b so as to face the surface of the pulley support part 72b at a distance. The pulley 71 is disposed between the pulley support part 72b and the arm part 72c, and is supported by the pulley support part 72b and the arm part 72c so as to be rotatable around the axis Ap. In this embodiment, when the pulley 71 is supported by the support member 72, the axis Ap of the pulley 71 inclines in the axial direction of the spool 30 from the lower end side toward the upper end side so as to move away from the winding member 3. That is, the pulley 71 is supported by the support member 72 so as to move downwardly from the axis As of the spool 30 as the pulley 71 moves away from the winding member 3 in the axial direction of the spool 30.

[0048] The biasing member 73 is a torsion spring having one end supported by the bracket 9 and the other end connected to the support member 72. The biasing member 73 biases the support member 72 in the clockwise direction in FIG. 11 so that the pulley 71 moves rearward away from the spool 30 (see the two-dot chain line in FIG. 11). The bracket 9 is provided with a stopper 9s that abuts against a part (base end 72a) of the support member 72 that has rotated counterclockwise in FIG. 11 so as to approach the spool 30 against the biasing force of the biasing member 73. However, the biasing member 73 is not limited to a torsion spring, and may be an elastic body such as a coil spring, a leaf spring, or a rubber material. The first string S1 from the drum member 15 is wound around the pulley 71 and then fixed to the spool 30.

[0049] When no slack is generated in the first string S1 between the drum member 15 and the spool 30, the pulley 71 of the first slack absorbing mechanism 70 described above approaches the spool 30 against the biasing force of the biasing member 73 due to the tension from the first string S1. In contrast, when slack is about to be generated in the first string S1 between the drum member 15 and the spool 30, the pulley 71 moves rearward from the spool 30 due to the biasing force of the biasing member 73 in response to a decrease in the tension of the first string S1, as shown by the two-dot chain line in Fig. 11, and pulls the first string S1 toward the rear of the vehicle. As a result, in the shade device 1, even if at least one of the shade 2 and the first string S1 is stretched, it is possible to effectively suppress slack in the first string S1 and appropriately move the shade 2.

[0050] Moreover, the first slack absorbing mechanism 70, i.e., the pulley 71, the support member 72 and the biasing member 73, are disposed on the side of the spool 30 opposite the drum member 15, i.e., on the vehicle rear side (rear) of the spool 30. This allows the first slack absorbing mechanism 70 to be disposed so as not to interfere with the side edge of the shade 2, making it possible to satisfactorily ensure the opening width when the shade 2 is opened.

[0051] Furthermore, the pulley 71 of the first slack absorbing mechanism 70 is supported by the support member 72 so that the axis Ap moves away from the winding member 3 in the axial direction of the spool 30 as it moves from the lower end side to the upper end side. This makes it possible to effectively suppress bending of the first string S1 between the pulley 71 and the spool 30.

[0052] In this embodiment, the spool 30 is configured to suppress the occurrence of relatively slight slack in the first string S1. That is, as shown in Fig. 13, the winding groove 31 of the spool 30 is formed so that the center C1 of the first string S1 wound around the winding groove 31 is located radially outward of the spool 30 with respect to the center in the thickness direction of the shade 2 wound around the winding member 3 (see the dashed line in Fig. 13). More specifically, the winding groove 31 is formed by forming a plurality of recesses 31 that appear in a cross section including the axis As of the spool 30 and the winding member 3. 1 ,31 2 ,31 3 , . . . is wound around the recess 31. 1 ,31 2 ,31 3 , ... is the distance (radius) φ from the central axis As in the thickness direction of the shade 2 wound up on the winding member 3 corresponding to 1 ,φ 2 ,φ 3 ,... than the distance φ 1 ,φ 2 ,φ 3 , ... by a difference dd equivalent to 1-5% (for example, 2% in this embodiment). This makes it possible to make the amount of the first string S1 wound around the spool 30 greater than the amount of the shade 2 wound around the winding member 3 when the winding member 3 and the spool 30 rotate together once, and effectively suppresses the occurrence of relatively slight slack in the first string S1.

[0053] FIG. 14 is a plan view showing the second slack absorbing mechanism 80. As shown in the figure, the second slack absorbing mechanism 80 includes a first slider 81, a second slider 82, and a biasing member 83. The first slider 81 is formed of resin or the like in a narrow and thin-walled rectangular parallelepiped shape, and has a first guide space 81a extending in the longitudinal direction at one end side (left end side in FIG. 14) from the center in the longitudinal direction, and a second guide space 81b extending in the longitudinal direction at the other end side (right end side in FIG. 14) from the center and communicating with the first guide space 81a. As shown in FIG. 15, the first slider 81 is arranged movably (slidably) in the internal space 4x of the shade bar 4 fixed to the tip of the shade 2.

[0054] The second slider 82 is a small piece made of resin or the like, and is disposed in the second guide space 81b of the first slider 81 so as to be movable (slidable) in the longitudinal direction of the first slider 81. In this embodiment, the biasing member 83 is a tension coil spring, and is disposed in the first guide space 81a so as to be able to enter the second guide space 81b of the first slider 81. One end (the left end in FIG. 14) of the biasing member 83 is fixed to one end of the first slider 81 in the first guide space 81a, and the other end (the right end in FIG. 14) of the biasing member 83 is fixed to the second slider 82 in the second guide space 81b. As a result, the second slider 82 is biased by the biasing member 83 so as to move from the other end side to one end side of the first slider 81.

[0055] One end of the second string S2 is fixed to one end of the first slider 81 within the internal space 4x of the shade bar 4. The other end of the second string S2 is inserted into the second guide space 81b through a hole formed in the other end of the first slider 81, and is fixed to the second slider 82 within the second guide space 81b. However, one end of the second string S2 may be fixed to the second slider 82, or the other end of the second string S2 may be fixed to one end of the first slider 81.

[0056] When there is no slack in the second string S2 between the drum member 15 and the shade bar 4 (second slack absorbing mechanism 80), the second slider 82 of the above-mentioned second slack absorbing mechanism 80 approaches the other end of the first slider 81 (the right end in FIG. 14) in the second guide space 81b against the biasing force of the biasing member 83 due to the tension from the second string S2, as shown in FIG. 14. In contrast, when slack is about to occur in at least one of the portion on one end side and the portion on the other end side of the second string S2, as shown in FIG. 16, one end of the first slider 81 (the left end in FIG. 16) and the second slider 82 approach each other due to the biasing force of the biasing member 83 in response to a decrease in the tension of the second string S2. As a result, the second string S2 is pulled in a direction from the drum member 15 toward the shade bar 4 by the movement of the second slider 82 relative to the first slider 81 or the movement of the first slider 81 within the internal space 4x.

[0057] As a result, in the shade device 1, even if at least one of the shade 2 and the second string S2 is stretched, the second string S2 is effectively prevented from slackening, and the shade 2 can be appropriately moved. Furthermore, in the shade device 1, a portion of the second string S2 inserted into the internal space 4x from one end side of the shade bar 4 and a portion of the second string S2 inserted into the internal space 4x from the other end side of the shade bar 4 are connected to each other via the second slack absorbing mechanism 80 in the internal space 4x, and are connected to the tip of the shade 2 via the shade bar 4, etc. This effectively prevents the second string S2 from slackening due to the stretching of the shade 2 and the second string S2, and effectively utilizes the internal space 4x into which the second string S2 of the shade bar 4 is inserted as an arrangement space for the second slack absorbing mechanism 80, thereby effectively preventing the shade device 1 from becoming large.

[0058] In addition, in the shade device 1, the portion of the second string S2 between the drum member 15 and one end of the shade bar 4 and the portion between the drum member 15 and the other end of the shade bar 4 are wound around the winding groove 151 so as to be aligned in the radial direction of the drum member 15. Therefore, when the drum member 15 rotates around the axis Ad in the first or second direction, a difference in moving speed (circumferential speed) occurs between a part of the second string S2 located on the radially outer side in the winding groove 151 and a part of the second string S2 located on the radially inner side, and this causes a difference in the winding length or the unwinding length between the part on the one end side and the part on the other end side of the second string S2. In contrast, in the shade device 1, one end and the other end of the second string S2 are connected to each other via the second slack absorbing mechanism 80. Therefore, even if a difference in moving speed occurs between the part on the one end side and the part on the other end side of the second string S2, the occurrence of slack in the second string S2 can be effectively suppressed. As a result, the shade bar 4 can be moved straight through the second string S2 without tilting, allowing the shade 2 to be opened and closed smoothly.

[0059] The structure for regulating the path of the second string S2 in the shade device 1 can be made lower and simpler than a geared cable or the like, which allows the entire device to be made compact. Furthermore, the loss associated with driving the second string S2 is also reduced compared to a geared cable or the like, which makes it possible to suppress the increase in size of the drive device 10. Therefore, the shade device 1 may include a retractor, which is a biasing mechanism for biasing the shade 2 in the retracting direction, and a configuration for retracting the second string S2 around the drum member 15 to open the shade 2. If the shade device 1 is provided with a slack absorption mechanism for absorbing slack in the second string S2 that occurs between the drum member 15 and the tip of the shade 2, even if at least one of the shade 2 and the second string S2 is stretched, it is possible to suppress slack in the second string S2 and move the shade 2 appropriately.

[0060] In the shade device 1, the first string S1 may be fixed to the upper end of the outer circumferential surface of the drum member 15, and the center of the second string S2 may be fixed to the lower end surface of the drum member 15. Furthermore, for example, a substantially conical spool (winding member) 30 may be coaxially fixed to each of the ends on both sides in the axial direction of the winding member 3. In this case, both ends of one first string S1 may be fixed (locked) to the corresponding spools 30, and the center of the first string S1 may be fixed to the drum member 15. In addition, the portion on one end side and the portion on the other end side of the first string S1 may protrude outward from different positions on the outer circumferential surface of the drum member 15 so as to be wound on the drum member 15 when the drum member 15 rotates around the axis Ad in the first direction.

[0061] Furthermore, in the shade device 1, the second string S2 does not necessarily have to be one, and two second strings S2 may be fixed to the drum member 15 and connected to each other via the second slack absorbing mechanism 80. Also, the second string S2 does not necessarily have to be inserted into the internal space 4x of the shade bar 4 via the string passage 55 of the shoe 5, and may be inserted only into the first chambers 60a of the pair of shoes 5. Also, the shade device 1 is attached to the vehicle body F so as to be located below the sunroof SR or a fixed transparent roof of the vehicle V, but is not limited thereto, and may be provided on the rear window or side window of the vehicle V.

[0062] FIG. 17 is a schematic diagram showing a configuration of another first slack absorbing mechanism 70B that can be applied to the shade device 1 instead of the above-mentioned first slack absorbing mechanism 70, and FIG. 18 is a cross-sectional view taken along line AA in FIG.

[0063] 17 biases the spool 30B in the direction opposite to the winding direction of the shade 2 so as to absorb slack in the first string S1, and is disposed inside the winding member 3, which is a hollow cylinder. In the shade device 1 including the first slack absorbing mechanism 70B, the spool 30B has a shaft portion 30s that extends in the axial direction from the large diameter end face to the opposite side to the small diameter end. As shown in the figure, the first slack absorbing mechanism 70B includes a support member 72B and a torsion spring 73B as a biasing member.

[0064] The support member 72B of the first slack absorbing mechanism 70B is formed of, for example, resin in a cylindrical shape with at least one end open, and is fixed, for example, by press-fitting into one end (in this embodiment, the end on the left side surface of the vehicle V) in the axial direction of the winding member 3 so as to open at that end. In addition, as shown in FIG. 18, the support member 72B has at least one protrusion 72x protruding radially outward from the outer circumferential surface, and the protrusion 72x is fitted into a slit 3x formed in the winding member 3. As a result, the support member 72B is disposed in one end of the winding member 3 so as to rotate integrally with the winding member 3. Furthermore, the shaft portion 30s of the spool 30B is inserted into the support member 72B fixed to the winding member 3. As a result, the shaft portion 30s, i.e., the spool 30B, is supported by the support member 72B, i.e., the winding member 3, so as to be rotatable around the axis As.

[0065] The torsion spring 73B of the first slack absorbing mechanism 70B is a so-called torsion coil spring, and is disposed in the support member 72B so as to extend coaxially with the axis As. One end (left end in FIG. 17) 731 of the torsion spring 73B is held by the shaft portion 30s of the spool 30B so as not to rotate around the axis As relative to the spool 30B. The other end (right end in FIG. 17) 732 of the torsion spring 73B is held by the support member 72B so as not to rotate around the axis As relative to the support member 72B, i.e., the winding member 3. The torsion spring 73B is held by the shaft portion 30s of the spool 30B and the support member 72B in a state in which it is twisted in advance around the axis As in the winding direction of the shade 2 so as to bias the spool 30B in the opposite direction (counterclockwise in FIG. 18) to the winding direction of the shade 2 relative to the winding member 3 with respect to the support member 72B (clockwise in FIG. 18).

[0066] Further, the first slack absorbing mechanism 70B includes a first stopper ST1 and a second stopper ST2. In the first slack absorbing mechanism 70B, as shown in FIG. 18, the first stopper ST1 is composed of a protrusion 30p protruding radially outward from the outer circumferential surface of the shaft portion 30s of the spool 30B and a first abutment surface 721 formed on the support member 72B. In the example of FIG. 18, the first abutment surface 721 and a first end face of the protrusion 30p on the downstream side in the winding direction of the shade 2 extend in the radial and axial directions of the shaft portion 30s. When the first end face of the protrusion 30p abuts against the first abutment surface 721 of the support member 72B, the rotation of the spool 30B in the winding direction of the shade 2 relative to the winding member 3 is restricted.

[0067] As shown in Fig. 18, the second stopper ST2 is composed of a protrusion 30p of the shaft portion 30s and a second abutment surface 722 formed on the support member 72B so as to be spaced from the first abutment surface 721 in the circumferential direction and in the direction opposite to the winding direction of the shade 2. In the example of Fig. 18, the second abutment surface 722 and a second end face of the protrusion 30p on the upstream side in the winding direction of the shade 2 extend in the radial and axial directions of the shaft portion 30s. When the second end face of the protrusion 30p abuts against the second abutment surface 722 of the support member 72B, rotation of the spool 30B relative to the winding member 3 in the direction opposite to the winding direction of the shade 2 is restricted.

[0068] When the support member 72B, the torsion spring 73B, and the spool 30B are assembled to the winding member 3, the spool 30B is urged by the torsion spring 73B in the direction opposite to the winding direction of the shade 2 (counterclockwise in FIG. 18), whereby the second end face of the protrusion 30p abuts against the second abutment surface 722 of the support member 72B. Furthermore, when the first string S1 is fixed to the drum member 15 and the spool 30B and is wound and pulled by the drum member 15, the first end face of the protrusion 30p of the spool 30B (shaft portion 30s) abuts against the first abutment surface 721 of the support member 72B. In this embodiment, the spring constant (rigidity) of the torsion spring 73B is determined so that when the rotation of the drum member 15 and the spool 30B stops and there is no slack in the first string S1 between the drum member 15 and the spool 30B, the tension of the first string S1 becomes slightly greater than the biasing force of the torsion spring 73B, thereby maintaining the first end face of the protrusion portion 30p and the first abutment surface 721 of the support member 72B in abutment with each other.

[0069] In the shade device 1 including the first slack absorbing mechanism 70B as described above, when no slack is generated in the first string S1 between the drum member 15 and the spool 30B, the tension of the first string S1 overcomes the biasing force of the first slack absorbing mechanism 70B, i.e., the torsion spring 73B, and the first end face of the protrusion 30p of the spool 30B (shaft 30s) abuts against the first abutment surface 721 of the support member 72B. This restricts the rotation of the spool 30B in the winding direction of the shade 2 relative to the winding member 3 by the first stopper ST1. As a result, it becomes possible to properly move the shade 2 by winding the first string S1 onto the drum member 15 (see the solid arrow in FIG. 18) or unwinding it from the drum member 15 (see the dotted arrow in FIG. 18).

[0070] On the other hand, when the first string S1 is about to become slack between the drum member 15 and the spool 30B, the spool 30B is rotated in the opposite direction to the winding direction of the shade 2 by the biasing force (restoring force) of the torsion spring 73B in response to a decrease in the tension of the first string S1 until the tension of the first string S1 and the biasing force of the torsion spring 73B are balanced. As a result, the first string S1 is wound onto the spool 30B, and the slack of the first string S1 is absorbed by the first slack absorbing mechanism 70B. As a result, in the shade device 1 including the first slack absorbing mechanism 70B, even if at least one of the shade 2 and the first string S1 is stretched, it is possible to effectively suppress the slack of the first string S1 and appropriately move the shade 2.

[0071] Furthermore, the first slack absorbing mechanism 70B is disposed inside the winding member 3, which is a cylinder. This allows the interior of the winding member 3 to be effectively utilized as an arrangement space for the first slack absorbing mechanism 70B, and effectively prevents the shade device 1 from becoming large. In addition, the first slack absorbing mechanism 70B allows the bracket 9B supporting the spool 30B to be made smaller than the bracket 9 supporting the spool 30 of the first slack absorbing mechanism 70, thereby further improving the mountability of the shade device 1.

[0072] The first slack absorbing mechanism 70B also includes a first stopper ST1 that restricts the rotation of the spool 30B in the winding direction of the shade 2 relative to the winding member 3. As a result, even if a large tension is applied from the drum member 15 to the first string S1 that is pulled out from the spool 30B and wound into the winding groove 151 when the shade 2 is wound around the winding member 3 and opened, the rotation angle of the spool 30B in the winding direction of the shade 2 relative to the winding member 3, i.e., the amount of twist of the torsion spring 73B, can be limited to a predetermined upper limit or less. As a result, it is possible to effectively suppress the tension applied from the spool 30B to the first string S1 (tension in the winding direction of the first string S1 around the spool 30B) from becoming excessive, and to effectively suppress a decrease in durability of the torsion spring 73B caused by excessive twisting in the winding direction of the shade 2.

[0073] Furthermore, the first slack absorbing mechanism 70B includes a support member 72B that is disposed inside the winding member 3 so as to rotate integrally with the winding member 3 and rotatably supports the shaft portion 30s extending from the spool 30B, and a torsion spring (urging member) 73B that is held by the spool 30B (shaft portion 30s) and the support member 72B so as to urge the spool 30B in the opposite direction to the winding direction of the shade 2 relative to the support member 72B. This makes it possible to dispose the first slack absorbing mechanism 70B, which urges the spool 30B in the opposite direction to the winding direction of the shade 2, inside the winding member 3 while suppressing an increase in the outer diameter and inner diameter of the winding member 3.

[0074] It goes without saying that the invention of this disclosure is not limited to the above embodiment, and various modifications can be made within the scope of the present disclosure. Furthermore, the above embodiment is merely a specific form of the invention described in the Summary of the Invention, and does not limit the elements of the invention described in the Summary of the Invention. [Industrial Applicability]

[0075] The invention of the present disclosure can be used in the vehicle shade device manufacturing industry and the like. [Explanation of symbols]

[0076] 1 vehicle shade device, 2 shade, 3 winding member, 30, 30B spool, 30s shaft portion, 31 winding groove, 4 shade bar, 4x internal space, 5 shoe, 6, 6C guide member, 6x slider guide passage, 9, 9B bracket, 10 drive device, 15 drum member, 151 winding groove, 70, 70B, 70C, 70D first slack absorption mechanism, 71 pulley, 72, 72B support member, 73, 73C, 73D biasing member, 73B torsion spring, 75 first slider, 76 second slider, 78 idler pulley, 79 tension pulley, 80 second slack absorption mechanism, 81 first slider, 82 second slider, 83 biasing member, 100 control device, Ad, Ap, As shaft center, M Motor, S1 1st string, S2 2nd string, SR Sunroof device, ST1 1st stopper, V Vehicle.

Claims

1. A shade device for a vehicle, comprising a shade and a winding member for winding up the shade, the shade device being provided on a roof of a vehicle, a winding member that is coaxial with and integrally rotatable with the winding member; a first string fixed to the winding member and wound around the winding member; A second string connected to a tip portion of the shade; a single drum member having a winding groove formed on its outer circumferential surface so as to extend in a spiral shape around an axis and rotatable about the axis; and a rotary drive source for rotating the drum member in forward and reverse directions around the axis, the drive device rotating the drum member in a predetermined first direction and winding one of the first and second strings around the emptied winding groove while unwinding one of the first and second strings from the winding groove, and rotating the drum member in a second direction opposite to the first direction and winding one of the first and second strings around the emptied winding groove while unwinding the other of the first and second strings from the winding groove; A shade device for a vehicle.

2. The vehicle shade device according to claim 1, When the driving device winds the second string around the drum member to move the tip of the shade away from the winding member, the first string is wound around the winding member which rotates together with the winding member in response to the movement of the tip of the shade, A shade device for a vehicle, wherein the first string is wound around the winding groove from one end side to the other end side in the axial direction of the drum member, and the second string is wound around the winding groove from the other end side to the one end side in the axial direction of the drum member.

3. The vehicle shade device according to claim 1 or 2, A shade bar having a space into which the second string is inserted is fixed to the tip of the shade, A shade device for a vehicle, in which a portion of the second string between the drum member and one end of the shade bar and a portion of the second string between the drum member and the other end of the shade bar are wound up around the winding groove so as to be aligned radially of the drum member.

4. The vehicle shade device according to claim 3, The shade device for a vehicle further includes a slack absorption mechanism that is connected to a portion of the second string that is inserted into the space from the one end side of the shade bar and a portion of the second string that is inserted into the space from the other end side of the shade bar within the space of the shade bar, and absorbs slack in the second string.

Images