JP6262415B2 - Solar shading device - Google Patents

Description

  The present invention relates to a solar radiation shielding device.

  A horizontal blind, which is a type of solar shading device, generally has a large number of slats suspended from a head box via a ladder cord. Such a horizontal blind has a mechanism for adjusting the angle of the slats. It is normal. Examples of such horizontal blinds include those disclosed in Patent Document 1 and Patent Document 2. In the horizontal blind shown in Patent Document 1, the protrusion provided on the sleeve abuts on the ball to restrict the rotation of the rotating shaft to which the sleeve is attached. However, the balls are stored in the ball storage portion, and the rotation shaft can be rotated 360 degrees or more by allowing the ball to move in the ball storage portion.

  Moreover, in the horizontal blind shown in Patent Document 2, the extension of the rotating body attached to the rotating shaft is located in the circular opening of the case, and the circular opening is provided with an uneven portion. The extension portion is provided with a thin wall portion, and the thin wall portion is provided with a protrusion, and the protrusion is located on the uneven portion. With such a configuration, the protrusion rotates while interfering with the convex portion of the concave and convex portion, whereby the rotating body receives resistance at every predetermined angle, which becomes a click feeling and the operator via the operation rod Given to.

Utility Model Registration No. 2560464 Japanese Patent No. 3805626

  By the way, in the structure shown in patent document 1, in order for a protrusion to rotate a circular hollow part without trouble, a some clearance gap is required between the inner wall face and protrusion of a circular hollow part, but the clearance gap is too large. Then, there is a possibility that the ball may come off from the ball storage portion and enter the gap, so that the ball is bitten. Furthermore, the ball needs to be positioned so that it can roll between the inner wall surface of the ball storage portion and the outer peripheral surface of the extension portion on the root side of the protrusion. If the gap between them is too large, the tip of the protrusion may be pressed against the ball, and so on, there is a possibility that the ball will bite.

  In particular, the protrusion abuts on a portion of the ball that is closer to the rotation axis (near the rotation center), while the end of the ball storage portion abuts on the side of the ball that is away from the rotation axis (the side that is away from the rotation center). As described above, the portion where the protrusion and the end of the ball storage portion abut against the ball are different in the radial direction, and the engagement with the ball is likely to occur due to a slight gap difference.

  Moreover, in the structure shown in patent document 2, there exists a possibility that a thin wall part may deteriorate during use over a long period of time, and the click feeling produced by a thin wall part may fall. For this reason, the desired click feeling may not be obtained, and the positioning function may be degraded.

  The present invention has been made on the basis of the above circumstances, and the purpose of the present invention is that it is possible to reliably perform rotation regulation of the rotating shaft and to exhibit a good positioning function over a long period of time. It is intended to provide a solar shading device that can achieve at least one of them.

In order to solve the above-described problem, according to a first aspect of the present invention, a gear box that connects a rotation shaft that can be rotated according to an operation at an operation site is provided at one end of the head box, A click unit is provided apart from the gear box, and the click unit is attached to the rotary shaft in a state of rotating integrally with the rotary shaft, and is attached to the rotary shaft so as to be rotatable. A rotating body disposed adjacent to the united body; and a case body having an internal space and accommodating the fitting body and the rotating body in the internal space, wherein the fitting body includes a first engaging portion. The rotating body is provided with the second engaging portion and the third engaging portion, the case body is provided with the fourth engaging portion, and the fitting body is made relatively to the rotating body by the rotation of the rotating shaft. Rotate In this case, the first engaging portion is provided so as to be able to collide with the second engaging portion, and after the collision, the rotating body rotates together with the fitting body, and the third engaging portion collides with the fourth engaging portion. In this case, a solar radiation shielding device is provided, in which the rotation of the rotating body in a direction that interferes with the fourth engaging portion is restricted.

  Further, according to another aspect of the present invention, in the above-described invention, the fitting body is provided with a sliding portion, and the sliding portion is provided with a convex portion and a concave portion, and the convex portion has a rotating shaft more than the concave portion. It is preferable to be provided protruding from the center of rotation.

  Furthermore, in another aspect of the present invention, in the above-described invention, it is preferable that the sliding member is pressed against the sliding portion in a state where the urging force is exerted by the urging member.

  In addition, according to another aspect of the present invention, in the above-described invention, at least one pair of convex portions is provided, and when the rotating body rotates together with the fitting body, the sliding member gets over the convex portions and feels a click. It is preferable that after the generation, the third engagement portion collides with the fourth engagement portion to restrict the rotational position of the rotation shaft.

  Further, according to another aspect of the present invention, in the above-described invention, a plurality of slats capable of changing the direction according to the rotation of the rotating shaft are supported via the cord member, and the recess is formed of the fitting body. At least three are provided along the circumferential direction, and the three recesses slide when the slat is in the fully open position and when the slat is in the first fully closed position. It is preferable that there is a member where the member is located and a member where the sliding member is located when the slat is in the second fully closed position which is opposite to the first fully closed position.

  According to another aspect of the present invention, in the above-described invention, the sliding member is accommodated in the case body, and the sliding member is fitted in the case body while sliding to the sliding portion as the fitting body rotates. It is preferable to move in the radial direction of the coalescence.

  Further, according to another aspect of the present invention, in the above-described invention, the fitting body is provided with a circumferential protrusion corresponding to the first engagement portion, and the case body is a restriction protrusion corresponding to the fourth engagement portion. The rotating body collides with the circumferential projection and is provided with a first projection corresponding to the second engagement portion, and also collides with the regulation projection and a second corresponding to the third engagement portion. It is preferable that a convex portion is provided.

  According to the present invention, in the solar radiation shielding device, it is possible to reliably perform rotation regulation of the rotation shaft. Moreover, it becomes possible to exhibit a favorable positioning function over a long period of time.

It is a front view which shows the structure of the horizontal blind concerning each embodiment of this invention. It is a top view which shows the structure of the horizontal blind concerning each embodiment. It is a side view which shows the structure of the horizontal blind which concerns on each embodiment. It is a disassembled perspective view which shows the structure of the click unit of the horizontal blind which concerns on 1st Embodiment. It is a perspective view which shows the structure of the click unit of the horizontal blind which concerns on 1st Embodiment. It is front sectional drawing which shows the structure of the click unit of the horizontal blind which concerns on 1st Embodiment. It is side surface sectional drawing which shows the structure of the click unit of the horizontal blind which concerns on 1st Embodiment. It is a perspective view which shows the structure of the click drum of the horizontal blind which concerns on 1st Embodiment. It is a perspective view which shows the structure of the to-be-transmitted shaft of the horizontal blind which concerns on 1st Embodiment. It is a perspective view which shows the structure of the lower case of the horizontal blind which concerns on 1st Embodiment. In 1st Embodiment, it is a schematic sectional side view which shows the positional relationship of the circumferential protrusion part of a click unit, a to-be-transmitted shaft, and a lower case (regulation protrusion part). It is a disassembled perspective view which shows the structure of the click unit of the horizontal blind which concerns on 2nd Embodiment. It is a perspective view which shows the structure of the click drum of the horizontal blind which concerns on 2nd Embodiment. It is a perspective view which shows the structure of the receiving shaft (intermediate receiving shaft) of the horizontal blind which concerns on a modification.

(First embodiment)
Hereinafter, a horizontal blind 10 as a solar shading device according to a first embodiment of the present invention will be described with reference to the drawings. In the following description, the XYZ orthogonal coordinate system may be used for explanation, and the X direction is the longitudinal direction of the horizontal blind 10, the X1 side is the right end side of FIG. 1, and the X2 side is the left end of FIG. Let it be the side. The Z direction is the horizontal blind hanging direction (vertical direction), the Z1 side is the upper side, and the Z2 side is the lower side. The Y direction is a direction orthogonal to the X direction and the Y direction, the Y1 side is the indoor side where the operation pole 40 is located, and the Y2 side is the opposite side.

<About the structure of the horizontal blind 10>
As shown in FIGS. 1 to 3, in the horizontal blind 10, a large number of slats 30 are suspended from a head box 20 via a plurality of ladder cords R <b> 1 at a predetermined pitch. A holder 31 is attached to the lower end side (Z2 side) of the ladder cord R1 and is attached to the bottom rail 32 via the holder 31. Note that the ladder code R1 corresponds to a code member.

  The bottom rail 32 has a lower end side (Z2 side) of the lifting / lowering cord R2 fixed thereto. The elevating cord R2 is inserted into an insertion hole (not shown) provided in each slat 30, and further inserted into the head box 20 and the operation pole 40, and is attached to the equalizer 41. Accordingly, the lifting / lowering cord R2 is interlocked with the vertical movement of the equalizer 41, and it is possible to easily realize a storage state in which a large number of slats 30 are stacked and a deployed state in which the slats 30 are arranged at a predetermined pitch.

  The lifting / lowering cord R <b> 2 passes through the stopper device 21 in the head box 20. The stopper device 21 switches between a restricting state in which the lifting / lowering cord R2 is prevented from moving in a direction in which the slat 30 is lowered and a released state in which the lifting / lowering cord R2 is allowed to move in a direction in which the slat 30 is lowered. Making it possible.

  As shown in FIGS. 1 and 2, the upper end side (Z1 side) of the ladder cord R <b> 1 is attached to a support drum 22 provided in the head box 20. The support drum 22 is rotatably attached to the housing 24 of the head box 20 via the support member 23. A fitting hole (not shown) is provided on the radial center side of the support drum 22, and the rotation shaft 25 is inserted into the fitting hole so that the support drum 22 and the rotation shaft 25 rotate integrally. Is provided.

  The rotary shaft 25 is provided in, for example, a hexagonal outer peripheral shape, and the above-described fitting hole is also provided in a hexagonal hole shape. Thereby, the support drum 22 and the rotating shaft 25 are provided so as to rotate integrally.

  A gear box 26 is provided on one end side of the rotating shaft 25 (long X1 side in FIG. 1). The gear box 26 is provided with a gear (not shown) such as a worm wheel, and the worm wheel is directly or indirectly connected to the rotating shaft 25. Further, the gear box 26 is provided with, for example, a worm (not shown) that meshes with a worm wheel, and the worm is directly or indirectly connected to the operation pole 40 (corresponding to the operation part). Accordingly, when the operation pole 40 is rotated, the rotational force is applied to the rotary shaft 25 via the worm and the worm wheel, and further to the support drum 22.

<About Click Unit 50>
A click unit 50 as shown in FIG. 4 to FIG. 7 is provided on the other end side of the rotating shaft 25 (long X2 side in FIGS. 1 and 2). As shown in FIGS. 4, 6, and 7, the click unit 50 includes a click drum 60, a transmitted shaft 70, a lower case 80, an upper case 90, a push spring 100, and a clutch ball 110. I have.

  A click drum 60 as shown in FIGS. 4 and 6 to 8 is attached to the rotary shaft 25 described above. The click drum 60 is a member that gives a click feeling when the rotary shaft 25 is rotated by the clutch ball 110 and the push spring 100. The click drum 60 is also a member that transmits the rotation to the transmitted shaft 70 and regulates the rotation range of the rotating shaft 25 via the transmitted shaft 70.

  The click drum 60 corresponds to the fitting body. The click drum 60 is provided with a ball sliding portion 61, a flange portion 62, a cylindrical portion 63, and a circumferential protrusion 64. Among them, the ball sliding portion 61 has an outer peripheral surface on which the clutch ball 110 slides. The ball sliding portion 61 corresponds to the sliding portion.

  As shown in FIG. 8, the outer peripheral surface of the ball sliding portion 61 is provided in an uneven shape having different radii from the rotation center of the click drum 60. That is, the ball sliding portion 61 has a minimum diameter portion 61a having a small radius, and when proceeding in the circumferential direction from the minimum diameter portion 61a, the ball sliding portion 61 shifts to a convex portion 61b having a gradually increasing radius to the outer peripheral surface.

  However, the ball sliding portion 61 is provided with a convex portion 61b having a radius larger than a certain reference radius and a concave portion smaller than the reference radius, instead of the above-described minimum diameter portion 61a and convex portion 61b. You may think that it is. Further, it may be understood that the ball sliding portion 61 is formed by forming a recess so as to be recessed from a certain cylindrical outer peripheral surface. Moreover, the minimum diameter part 61a is good also as a thing corresponding to a recessed part.

  As shown in FIGS. 7 and 8, the minimum diameter portion 61a and the convex portion 61b are provided at predetermined intervals along the circumferential direction. Thereby, it is possible to position the rotation of the rotary shaft 25 at predetermined angles. In the configuration shown in FIGS. 7 and 8, a total of eight minimum diameter portions 61a and convex portions 61b are provided to enable positioning every 45 degrees.

  The click drum 60 is provided with a flange portion 62 adjacent to the ball sliding portion 61 described above. The flange portion 62 has an outer peripheral surface that has a larger radius than a portion that is the maximum diameter of the convex portion 61 b of the ball sliding portion 61. Thereby, the flange portion 62 partitions the internal space S formed when the lower case 80 and the upper case 90 are attached, and the flange portion 62 is positioned in flange recesses 82 and 92 described later, so that the lower case 80 The position of the click drum 60 with respect to the upper case 90 is determined. Further, since the flange portion 62 is positioned in the flange recesses 82 and 92, the flange portion 62 also has a function as a bearing for the click drum 60.

  In addition, the outer peripheral surface of the flange part 62 may have a radius smaller than the site | part used as the largest diameter of the convex part 61b.

  As shown in FIG. 8, the click drum 60 is also provided with a cylindrical portion 63. Although the cylindrical portion 63 is adjacent to the ball sliding portion 61, the adjacent position is opposite to the flange portion 62. The cylindrical portion 63 is a portion provided in a cylindrical shape in the click drum 60, and has an outer peripheral surface having a slightly smaller radius than the minimum diameter portion 61a. A part of the cylindrical portion 63 protrudes from the opening A1 (see FIG. 6) of the lower case 80 and the upper case 90 to the outside. Further, a part of the cylindrical portion 63 comes into contact with the inner wall surface of the opening A <b> 1, whereby the cylindrical portion 63 also has a function as a bearing for the click drum 60.

  However, the cylindrical portion 63 may have an outer peripheral surface having a radius equal to or larger than that of the minimum diameter portion 61a.

  The cylindrical portion 63 is provided with a positioning recess 63a as shown in FIG. The positioning recess 63a is a portion in which the cylindrical portion 63 is cut out in a triangular shape. When the click drum 60 is assembled, the position of the click drum 60 in the circumferential direction can be confirmed by the presence of the positioning recess 63a.

  As shown in FIGS. 6 and 8, the flange portion 62 is provided with a circumferential protrusion 64 corresponding to the first engagement portion. The circumferential protrusion 64 is provided so as to protrude from the surface of the flange portion 62 opposite to the ball sliding portion 61. The circumferential protrusion 64 is a portion that collides with the drum-side convex portion 75 of the transmission shaft 70. The rotation range of the click drum 60 and the rotating shaft 25 is restricted by the collision and the collision of other parts.

  The circumferential protrusion 64 is provided in a block shape having a predetermined thickness over a predetermined angle in the circumferential direction of the click drum 60, whereby the circumferential protrusion 64 is provided in an arc shape. However, in addition to the arc shape, the circumferential protrusion 64 may adopt a configuration in which two or more are provided so as to define one end and the other end of a predetermined angle, for example, and other forms such as a pin shape are adopted. May be. Further, the circumferential protrusion 64 is provided over an angle range smaller than 90 degrees (see FIG. 11). Specifically, the circumferential protrusion 64 extends over an angular range that allows the click drum 60 to rotate approximately 360 degrees (including 360 degrees) after colliding with a drum-side convex portion 75 described later. Is provided. However, the circumferential protrusion 64 may be provided over the angular range.

  Further, the click drum 60 is provided with an insertion hole 65 through which the rotary shaft 25 is inserted, and the insertion hole 65 is provided with a fitting hole 65a (see FIGS. 6 and 7). The fitting hole 65 a is provided in a shape corresponding to the outer peripheral shape of the rotating shaft 25. In the present embodiment, since the rotation shaft 25 is provided in a hexagonal outer peripheral shape (see FIGS. 4 and 5), the fitting hole 65a is also provided in a hexagonal hole shape (see FIG. 7). ). Thereby, the click drum 60 rotates together with the rotation shaft 25 without moving relative to the rotation shaft 25. A portion of the insertion hole 65 on the cylindrical portion 63 side (X2 side) is a round hole 65b.

  As shown in FIG. 4, the transmitted shaft 70 is also inserted through the rotating shaft 25 in the same manner as the click drum 60. The transmitted shaft 70 is connected to the flange portion 62 side (X1 side) of the click drum 60 in the rotating shaft 25. Is placed adjacent to. The transmitted shaft 70 corresponds to a rotating body.

  As shown in FIG. 9, the transmitted shaft 70 has a cylindrical cylindrical portion 71. Further, the transmitted shaft 70 is provided with a flange portion 72, a drum engaging portion 73, and a case engaging portion 74. The flange portion 72 is provided at an intermediate portion in the axial direction (X direction) of the transmitted shaft 70 on the outer peripheral surface of the cylindrical portion 71. The flange portion 72 has a function of defining the position in the axial direction (X direction) in the internal space S formed by the lower case 80 and the upper case 90, and is in contact with the inner wall surface of the internal space S. Also, it has a function as a bearing of the transmitted shaft 70. As shown in FIGS. 4 and 9, the flange portion 72 is provided at a position deviated toward the click drum 60 side (X2 side) from the center of the cylindrical portion 71 in the axial direction (X direction).

  A drum engaging portion 73 is provided on the clicked drum 60 side (X2 side) of the transmitted shaft 70 with respect to the flange portion 72. The drum engaging portion 73 includes a portion of the cylindrical portion 71 closer to the click drum 60 than the flange portion 72 (divided cylindrical portion 71a) and a drum-side convex portion 75 protruding outward from the cylindrical portion 71 in the radial direction. Have. As shown in FIG. 9, in this embodiment, two drum-side convex portions 75 are provided, and the interval between the two drum-side convex portions 75 is the click drum after colliding with the circumferential protrusion 64. 60 is provided at an interval such that 60 can be rotated approximately 360 degrees (including 360 degrees). FIG. 9 shows a case of approximately 90 degrees as such an interval. However, the interval between the drum-side convex portions 75 may be an interval other than the interval described above. The drum-side convex portion 75 corresponds to the second engaging portion and the first convex portion.

  Each of the two drum-side convex portions 75 is a portion that collides with the circumferential protrusion 64. Due to this collision, the transmitted shaft 70 is rotated with respect to the lower case 80 and the upper case 90. In addition, the circumferential projection part 64 is located in the side (outer periphery loose fitting part 76) with a large space | interval between the two drum side convex parts 75 among the outer peripheral sides of the division | segmentation cylindrical part 71a. Therefore, the click drum 60 can rotate relative to the transmitted shaft 70 until the circumferential protrusion 64 collides with the drum-side convex portion 75 at the outer periphery loose fitting portion 76.

  Further, as shown in FIG. 9, a case engagement portion 74 is provided on the opposite side (X1 side) of the transmission shaft 70 with respect to the click drum 60 across the flange portion 72. The case engaging part 74 projects from the flange part 72 to the opposite side (X1 side) of the click part 60 from the flange part 72 (divided cylindrical part 71b), and projects from the cylindrical part 71 toward the outside in the radial direction. And a collision convex portion 77. In addition, the collision convex part 77 respond | corresponds to a 3rd engaging part and a 2nd convex part.

  The collision convex portion 77 is provided so as to extend from the flange portion 72 to the middle portion of the outer peripheral surface of the divided cylindrical portion 71b, starting from the flange portion 72. And the part between the front-end | tip part of the collision convex part 77 and the edge part (X1 side edge part) of the division | segmentation cylindrical part 71b is the opening part A2 (refer FIG. 6) of the lower case 80 and the upper case 90. In contact with the inner wall surface, the cylindrical portion 71 has a function as a bearing of the transmitted shaft 70 together with the flange portion 72.

  As shown in FIG. 9, in the present embodiment, the collision convex portion 77 is positioned along the same straight line as the drum-side convex portion 75 with the flange portion 72 interposed therebetween. Therefore, the interval between the two collision convex portions 77 is the same as that of the drum-side convex portion 75 described above, and a detailed description thereof will be omitted.

  Next, the lower case 80 will be described. As shown in FIGS. 1 and 2, the lower case 80 is attached together with the upper case 90 to a portion on one end side (X2 side in FIGS. 1 and 2) in the head box 20. The lower case 80 corresponds to a part of the case body and constitutes the case body together with the upper case 90. The lower case 80 forms an internal space S together with the upper case 90, and the rotary shaft 25 is inserted through openings A1 and A2 (see FIG. 6) at both ends of the internal space S in the X direction. In this internal space S, the click drum 60 and the transmitted shaft 70 are disposed, and these are disposed on the outer peripheral side of the rotating shaft 25. A part of the cylindrical part 63 protrudes from the opening A1 on one end side.

  The lower case 80 is provided with a substantially half space (divided space 81) of the internal space S. On the side of the openings A1 and A2 of the divided space 81, the diameter of the openings A1 and A2 is reduced. The wall portion is provided so as to protrude from the other portion of the divided space 81 so as to pivotally support the cylindrical portions 63 and 71 b on the inner wall surface. The divided space 81 is provided with a flange recess 82 into which the flange portion 62 is fitted. By this fitting, the position of the click drum 60 in the X direction is determined.

  In addition, a restriction projection 83 is provided on the side of the divided space 81 that is away from the click drum 60 (X1 side). The restricting protrusion 83 corresponds to the fourth engaging portion and the case side engaging portion. The restricting protrusion 83 is a portion that restricts the rotation of the transmission shaft 70 by colliding with the collision convex portion 77. The rotation of the click drum 60 can also be regulated by regulating the rotation of the transmitted shaft 70. The restricting projection 83 is provided in a circumferential shape similar to the circumferential projection 64, so that the click drum 60 can be rotated approximately 360 degrees (including 360 degrees) via the transmitted shaft 70. Over a wide angular range. In the configuration shown in FIG. 10, the inner peripheral surface of the restricting projection 83 is provided integrally with the inner wall surface of the opening A2.

  As shown in FIG. 10, a pocket portion 84 is provided in communication with the internal space S. The pocket portion 84 is a portion that accommodates the push spring 100 and the clutch ball 110 provided in a circularly recessed shape from the internal space S. On the bottom side (Z2 side) of the pocket portion 84, the lower end of the push spring 100 is received, and on the other hand, the clutch ball 110 is disposed on the upper end side (Z1 side) of the push spring 100. As a result, a biasing force toward the upper side (the ball sliding portion 61 side; Z1 side) is applied to the clutch ball 110 by the push spring 100.

  The push spring 100 is, for example, a coil spring, but biasing means other than the coil spring, such as a plate spring, a torsion spring, and rubber, may be used. In addition, the clutch ball 110 is a spherical member made of resin, but for example, a member other than a spherical member having a pointed tip may be used, or a roller may be used. The push spring 100 corresponds to an urging member. The clutch ball 110 corresponds to a sliding member.

  As shown in FIG. 7 and FIG. 10, hooks 85 are respectively provided on the outer walls of the lower case 80, and the upper case 90 (corresponding to a part of the case body) is connected to the lower case 80 via the hooks 85. ) Is attached. The upper case 90 is also provided with a substantially half space (divided space 91) of the internal space S. As shown in FIG. 6, on the side of the openings A1 and A2 of the divided space 91, the wall portion is divided into spaces so that the opening diameter is narrowed and the cylindrical parts 63 and 71b are pivotally supported by the inner wall surfaces of the openings A1 and A2. 91 is provided so as to protrude from other portions. Similarly to the lower case 80, a flange recess 92 into which the flange portion 62 is fitted is also provided in the divided space 91 of the upper case 90.

<About operation>
Next, the operation of the horizontal blind 10 configured as described above will be described below.

  When the user holds the operation pole 40 and rotates the operation pole 40, the rotational force is applied to the rotation shaft 25 via the worm and the worm wheel, and the rotation shaft 25 is rotated. Since the support drum 22 is attached to the rotary shaft 25, the rotational force is applied to the support drum 22. Since the upper end side (Z1 side) of the ladder cord R1 is attached to the support drum 22, the support drum 22 is rotated by the rotation of the operation pole 40. Then, the angle of the slat 30 is changed via the ladder cord R1 according to the direction and amount of rotation. As shown in FIGS. 11A to 11E, the slat 30 can change the angle from the fully closed position to the reverse fully closed position.

  Further, the click drum 60 is also rotated integrally with the rotation shaft 25 by the rotation of the rotation shaft 25 via the operation pole 40. When the click drum 60 rotates, the convex portion 61 b of the ball sliding portion 61 receives an urging force by the push spring 100 via the clutch ball 110, and this becomes the rotational resistance of the click drum 60. Therefore, when the rotational force from the rotary shaft 25 or the like is not applied to the click drum 60, the clutch ball 110 is positioned on the ball sliding portion 61 so as to abut on the minimum diameter portion 61a and maintains the state.

  In addition, when the clutch ball 110 gets over the convex portion 61b, a force for rotating the rotary shaft 25 in any direction is exerted by the biasing force of the push spring 100, and a click sound is generated when the clutch ball 110 gets over. The click sound is generated, for example, when the clutch ball 110 collides with the ball sliding portion 61, but may be generated due to other causes. The occurrence of such a clicking sound allows the user to recognize that the angle of the slat 30 has changed. In addition to the click sound, a feel given by the pressing spring 100 at the time of clicking also occurs, but the touch and the click sound may be referred to as a click feeling.

  When the rotation of the rotary shaft 25 is continued, one drum-side convex portion 75 of the transmitted shaft 70 collides with the end of the circumferential protrusion 64 of the click drum 60, and the rotary shaft is further rotated after the collision. When the click drum 60 is rotated by the rotation of 25, the transmitted shaft 70 is rotated with the rotation of the click drum 60. When this rotation continues, the other collision convex portion 77 of the transmitted shaft 70 collides with the regulation projection portion 83. After this collision, the transmitted shaft 70 cannot continue to rotate.

  In addition, when the rotating shaft 25 rotates in the reverse direction, the operation is the same as described above.

  FIG. 11 shows the positional relationship between the transmitted shaft 70 and the restricting projection 83 when the click drum 60 rotates as described above. In FIG. 11, the upper part shows a side sectional view of the drum engaging part 73, the middle part shows a side sectional view of the case engaging part 74 and the lower case 80, and the lower part shows the direction of the slat 30. In the following, in FIG. 11A, the lower drum-side convex portion 75 is referred to as a drum-side convex portion 75a, and the upper drum-side convex portion 75 is referred to as a drum-side convex portion 75b. In FIG. 11A, the lower collision convex portion 77 is referred to as a collision convex portion 77a, and the upper collision convex portion 77 is referred to as a collision convex portion 77b.

  As shown in FIG. 11A, the slat 30 is in a fully closed position whose width direction is along the vertical direction (Z direction). At that time, the collision convex portion 77a of the transmitted shaft 70 collides with the regulation projection portion 83. ing. At this time, when the rotating shaft 25 is further rotated to the opposite side (counterclockwise) from the direction in which the slat 30 heads toward FIG. 11B, the circumferential protrusion 64 collides with the drum-side convex portion 75b. It becomes. However, when the rotation toward the opposite side is loosened, the drum-side convex portion 75b remains at a position having a slight gap with respect to the circumferential projection portion 64 or maintains a state of colliding with the circumferential projection portion 64. To do.

  When the rotation shaft 25 is rotated 90 degrees clockwise in FIG. 11A, the clutch ball 110 gets over the convex portion 61b to generate a click feeling, and then is positioned at the position shown in FIG. 11B. It becomes. At this time, the slat 30 is rotated 45 degrees from fully closed to fully open. At this time, since the circumferential protrusion 64 is separated from the drum-side convex portion 75b, the click drum 60 is rotated together with the rotary shaft 25, but the transmitted shaft 70 is not rotated, and the same rotational position as in FIG. Will be held.

  Further, when the rotary shaft 25 is rotated 90 degrees clockwise in FIG. 11B, the clutch ball 110 gets over the convex portion 61b to generate a click feeling, and then is positioned at the position shown in FIG. 11C. It becomes. At this time, the slat 30 is located at a position where it is fully open (horizontal). In the process of shifting from FIG. 11B to FIG. 11C, the circumferential protrusion 64 does not collide with the drum-side protrusions 75a and 75b. It will be in the state which maintains the same rotational position as FIG. 11 (A), without rotating. However, in the state shown in FIG. 11C, the drum-side convex portion 75 a remains at a position having a slight gap with respect to the circumferential protrusion 64 or maintains a state of colliding with the circumferential protrusion 64. To do.

  When the rotation shaft 25 is further rotated 90 degrees clockwise in FIG. 11C, the clutch ball 110 gets over the convex portion 61b to generate a click feeling, and then is positioned at the position shown in FIG. It becomes. At this time, the slat 30 is further rotated 45 degrees (reverse 45 degrees). When the transition from FIG. 11C to FIG. 11D is made, the transmitted shaft 70 is also rotated 90 degrees clockwise due to the collision between the drum-side convex portion 75a and the circumferential projection 64. Be made.

  When the rotation shaft 25 is rotated 90 degrees clockwise in FIG. 11 (D), the clutch ball 110 gets over the convex portion 61b to generate a click feeling, and then is positioned at the position shown in FIG. 11 (E). Become. At this time, the slat 30 is further rotated by 45 degrees, and the width direction is at the fully closed position along the vertical direction. However, since the fully closed position is a position that is 180 degrees different from the fully closed position shown in FIG. 11A, in the following description, the position of the slat 30 shown in FIG. Call it. Also, in the case of transition from FIG. 11D to FIG. 11E, the transmitted shaft 70 is rotated 90 degrees clockwise due to the collision between the drum-side convex portion 75a and the circumferential projection 64. .

  In addition, when it is going to rotate the rotating shaft 25 further clockwise from the state shown to FIG.11 (E), since the collision convex part 77b collides with the control projection part 83, it does not rotate any more. As a result, the click drum 60 and the rotary shaft 25 are not rotated any further.

  As described above, the rotating shaft 25 and the click drum 60 can be rotated 360 degrees, which is from FIG. 11 (A) to FIG. 11 (E).

<Effect>
According to the horizontal blind 10 having the above-described configuration, unlike the conventional patent document 1, the ball is positioned in the ball housing portion, and the rotation axis of the rotation shaft is not regulated using this ball. When the collision projection 77 of 70 collides with the regulation projection 83 of the lower case 80, the rotation of the rotary shaft 25 is regulated. Therefore, as in Patent Document 1, when the gap between the inner wall surface of the circular hollow portion and the protrusion is large, or when the gap between the protrusion and the ball storage portion is large, the ball bites and rotates. It is possible to prevent troubles from occurring.

  In the present embodiment, the rotation of the click drum 60 that rotates integrally with the rotating shaft 25 is not directly controlled, but a transmission shaft 70 that does not rotate integrally with the rotating shaft 25 is interposed, The rotation of the click shaft 60 and the rotation shaft 25 is restricted by the rotation restriction of the transmitted shaft 70. Therefore, as a range in which the rotation shaft 25 can rotate, if the transmission shaft 70 is not included, the click shaft 60 can rotate relative to the lower case 80 in addition to the range in which the click drum 60 can rotate relative to the lower case 80. The range that can be rotated is added. Therefore, it is possible to increase the angle range in which the rotation of the rotation shaft 25 is allowed.

  In particular, the present embodiment employs the following configuration. That is, the click drum 60 is provided with a circumferential protrusion 64, the transmitted shaft 70 is provided with a drum-side protrusion 75 and a collision protrusion 77, and the lower case 80 is provided with a restriction protrusion 83. . When the click drum 60 is rotated relative to the transmission shaft 70 by the rotation of the rotary shaft 25, the circumferential protrusion 64 is provided so as to be able to collide with the drum-side convex portion 75. The click drum 60 rotates with the transmitted shaft 70. However, when the collision convex portion 77 of the transmitted shaft 70 collides with the restricting projection 83, the rotation of the transmitted shaft 70 in the direction of interfering with the restricting projection 83 is restricted. By adopting such a configuration, although the rotation of the rotary shaft 25 is restricted, the angular range in which the rotation of the rotary shaft 25 is allowed can be increased.

  Further, in the present embodiment, the click drum 60 is provided with a ball sliding portion 61, and the ball sliding portion 61 is provided with a minimum diameter portion 61a and a convex portion 61b. Further, the clutch ball 110 is pressed against the ball sliding portion 61 by the pressing spring 100. For this reason, when the rotating shaft 25 is rotated and the clutch ball 110 gets over the convex portion 61b, it is possible to generate a click feeling accompanied by a click sound. It becomes possible to recognize that has changed.

  Here, as a means for generating a click feeling, it is also possible to employ a method in which a protrusion is provided on the thin wall portion of the extension portion and the protrusion is pressed against the uneven portion of the circular opening as in the configuration shown in Patent Document 2. Although it is possible, in such a configuration, the thin wall portion is deteriorated while being used for a long time, and the click feeling generated by the thin wall portion may be reduced. For this reason, the desired click feeling may not be obtained, and the positioning function may be degraded.

  However, in the present embodiment, as a means for generating a click feeling, a method of pressing the clutch ball 110 against the ball sliding portion 61 by the pressing spring 100 is used. For this reason, a problem such as deterioration of the thin wall portion does not occur, and a good click feeling can be obtained over a long period of time. In addition, the positioning function by pressing the clutch ball 110 against the ball sliding portion 61 by the pressing spring 100 does not have the above-described deterioration problem, and therefore, it is possible to achieve a good positioning function over a long period of time. Become.

  Further, in the present embodiment, among the plurality of convex portions 61b, the clutch ball 110 gets over just before the collision convex portion 77 collides with the restricting protrusion 83 and the rotational position of the rotary shaft 25 is restricted. There is something that causes a click feeling. For this reason, the user can recognize the end of the rotatable range of the rotating shaft 25, and can prevent problems such as forcibly rotating the rotating shaft 25.

  Further, in the present embodiment, among the plurality of minimum diameter portions 61a, the clutch ball 110 is located when the slat 30 is in the fully open position, and the slat 30 is entirely as shown in FIG. There is a case where the clutch ball 110 is positioned when the closed position is reached, and a case where the clutch ball 110 is positioned when the slat 30 is at the fully closed position (reverse fully closed position) as shown in FIG. doing. For this reason, it is possible to satisfactorily perform positioning (position holding) at the rotation end of the rotation shaft 25.

  Furthermore, in this embodiment, the click drum 60 is provided with a circumferential protrusion 64, and the lower case 80 is provided with a restriction protrusion 83. Further, the transmitted shaft 70 is provided with a drum-side convex portion 75 that collides with the circumferential projection portion 64 and a collision convex portion 77 that collides with the regulating projection portion 83. Therefore, when the click drum 60 is rotated by a predetermined amount along with the rotation of the rotation shaft 25, the circumferential protrusion 64 and the drum-side protrusion 75 collide, and the transmitted shaft 70 can be rotated by the collision. Become. At this time, since the rotation shaft 25 can be rotated by a predetermined angle range before the circumferential protrusion 64 and the drum-side convex portion 75 collide, the angle range in which the rotation of the rotation shaft 25 is allowed. Can be increased. In addition, the rotation of the rotary shaft 25 can be reliably controlled by the collision between the circumferential protrusion 64 and the drum-side protrusion 75 and the collision between the collision protrusion 77 and the restriction protrusion 83.

  In the present embodiment, the clutch ball 110 is housed in the pocket portion 84 of the lower case 80. The clutch ball 110 slides on the ball sliding portion 61 as the click drum 60 rotates. The inside of the pocket part 84 is moved. In addition, the clutch ball 110 moves in the radial direction of the click drum 60 inside the pocket portion 84. In this case, since the clutch ball 110 moves in a direction in which the clutch ball 110 contacts and separates from the rotation center of the click drum 60, the clutch associated with the rotation of the click drum 60 in any of the normal rotation and the reverse rotation of the click drum 60. The slidability of the ball 110 is the same, and the same click feeling can be obtained with any rotation.

  When the clutch ball 110 moves in the vertical direction (Z direction; the direction in which the plurality of slats 30 are arranged when the ladder cord R1 is stretched), the clutch ball 110 moves in the width direction (Y direction). Compared to the above, the width of the head box 20 can be made compact. That is, in the horizontal blind 10 of the present embodiment, it is possible to increase the angular range in which the rotation of the rotary shaft 25 is allowed while suppressing an increase in the dimension in the width direction (Y direction).

(Second Embodiment)
Hereinafter, a horizontal blind 10 according to a second embodiment of the present invention will be described with reference to the drawings. The horizontal blind 10 in the present embodiment has the same configuration as the horizontal blind 10 in the first embodiment described above, except for the click unit 50A. Therefore, in the following description, the click unit 50A will be described, and description of other parts will be omitted. In the present embodiment, parts other than the click unit 50A will be described using the same reference numerals as those of the parts of the first embodiment described above.

  As shown in FIG. 12, in the present embodiment, the configuration of the click drum 60A constituting the click unit 50A is different from the click drum 60 in the first embodiment described above. As shown in FIG. 13, in the present embodiment, the ball sliding portion 61A of the click drum 60A is provided with two convex portions 61b. Two minimum diameter portions 61a exist between the two convex portions 61b. However, of the two minimum diameter portions 61a, the circumference of one minimum diameter portion 61a1 is short, and the circumference of the other minimum diameter portion 61a2 is long.

  Here, when the clutch ball 110 is positioned at the other smallest diameter portion 61a2, the rotating shaft 25 does not reach the end of rotation but can rotate according to the application of the rotational force. However, when the clutch ball 110 is positioned at one of the minimum diameter portions 61a1 over the convex portion 61b from the other minimum diameter portion 61a2 (at this time, a click feeling is generated), the rotating shaft 25 reaches the end of rotation and beyond. Rotation is regulated.

  That is, the convex portion 61b has a function of notifying that the rotation end of the rotary shaft 25 has been reached due to the occurrence of a click feeling. However, when the clutch ball 110 is positioned at the other minimum diameter portion 61a2, the position of the clutch ball 110 is not determined, and the clutch ball 110 is free within the range of the circumference of the other minimum diameter portion 61a2. It is possible to slide on.

  In the horizontal blind 10 having the click unit 50A having such a configuration, the predetermined angle of the rotary shaft 25 is set via the click drum 60A and the transmitted shaft 70 in the same manner as the horizontal blind 10 in the first embodiment described above. It becomes possible to regulate the above rotation. In addition to the range in which the click drum 60A can rotate, the range in which the transmission shaft 70 can rotate is added as the range in which the rotation shaft 25 can rotate, and therefore the rotation of the rotation shaft 25 is allowed. It is possible to increase the angle range.

  Furthermore, in the present embodiment, the clutch ball 110 can freely slide within the range of the circumference of the other smallest diameter portion 61a2, and therefore the angle of the slat 30 can be freely changed within the range of the circumference. It becomes possible.

<Modification>
As mentioned above, although each embodiment of this invention was described, this invention can be variously deformed besides this. This will be described below.

  In each of the above-described embodiments, a configuration in which only one transmitted shaft 70 is provided is employed. However, the click unit may be configured by using two or more transmitted shafts. However, in the case of adopting a configuration using two or more such transmitted shafts, it is necessary to slightly change the configuration of the transmitted shaft positioned at the intermediate position. That is, as shown in FIG. 14, in the transmitted shaft 70B (intermediate transmitted shaft 70B) positioned at an intermediate position such as between the click drum 60 and the transmitted shaft 70 or between the transmitted shafts 70, the flange portion A drum-side convex portion 75 is provided on the cylindrical portion 71 from 72 to the click drum 60 side (X2 side). However, the collision convex portion 77 is not provided. Instead, a projecting portion 78 similar to the circumferential projecting portion 64 is configured to extend from the flange portion 72 toward the side opposite to the click drum 60 (X1 side).

  Here, in addition to the arc shape, the projecting portion 78 may adopt a configuration in which two or more are provided so as to define one end and the other end of a predetermined angle, for example, and other forms such as a pin shape are adopted. Also good. Further, the protrusion 78 is provided over an angle range smaller than 90 degrees. Specifically, the protrusion 78 is provided over an angular range that allows the click drum 60 to be rotated approximately 360 degrees (including 360 degrees) after colliding with the drum-side protrusion 75. . However, the protrusion 78 may be provided over the angular range.

  When the intermediate transmission shaft 70B having such a configuration is used, the rotation angle of the rotary shaft 25 can be increased by the number of the intermediate transmission shafts 70B used.

  Further, in each of the above-described embodiments, the click unit 50 has the transmitted shaft 70. However, the click unit 50 may have a configuration that does not include the transmitted shaft 70. In such a configuration, since the transmitted shaft 70 does not exist, the rotation angle of the rotating shaft 25 cannot be increased. However, since the clutch ball 110 abuts against the ball sliding portion 61 of the click drum 60 in a state where the urging force of the push spring 100 is received, a good click feeling is generated when the clutch ball 110 gets over the convex portion 61b. It becomes possible to make it.

  Further, in each of the above-described embodiments, the case where the present invention is applied to the horizontal blind 10 as a solar radiation shielding device has been described. However, the solar shading device to which the present invention is applied is not limited to the horizontal blind 10, and the present invention may be applied to a vertical blind.

  Further, in each of the above-described embodiments, the convex portion 61b corresponding to the rotation end of the rotation shaft 25 exists in each rotation direction. That is, the click drum 60 includes a protrusion 61b corresponding to the rotation end when the rotation shaft 25 is rotated clockwise and a protrusion 61b corresponding to the rotation end when the rotation shaft 25 is rotated counterclockwise. The ball sliding portion 61 is provided. However, you may comprise so that the convex part 61b corresponding to either one of the clockwise rotation and the counterclockwise rotation end may be provided.

  Further, in the first embodiment described above, eight minimum diameter portions 61 a and convex portions 61 b are provided along the circumferential direction of the click drum 60. However, the number of the minimum diameter portions 61a and the convex portions 61b is not limited to eight. For example, the minimum diameter portion 61a where the clutch ball 110 is positioned and held when the slat 30 is in the fully open position, and the clutch ball 110 is positioned and held when the slat 30 is in the fully closed position (first fully open position). There are a minimum diameter portion 61a and a minimum diameter portion 61a in which the clutch ball 110 is positioned and held when the slat 30 is in a reverse fully closed position (second fully open position), and a convex portion 61b corresponding thereto. A configuration in which is provided may be adopted.

  In the present embodiment, the click unit 50 is provided with a click drum 60 for generating a click feeling. However, the click drum may not be configured to have the convex portion 61b, and a configuration in which the push spring 100 and the clutch ball 110 are omitted may be employed. In such a configuration, since the click feeling is not obtained even if the rotation shaft 25 is rotated, the rotation shaft 25 is positioned at the end of rotation or the slat 30 has a predetermined inclination angle. It is unknown. However, it is possible to increase the rotation range of the rotating shaft 25.

  DESCRIPTION OF SYMBOLS 10 ... Horizontal blind (corresponding to solar shading device), 20 ... Head box, 22 ... Support drum, 25 ... Rotating shaft, 26 ... Gear box, 30 ... Slat, 40 ... Operation pole (corresponding to operation part), 50, 50A ... click unit, 60, 60A ... click drum (corresponding to fitting body), 61, 61A ... ball sliding part (corresponding to sliding part), 61a ... minimum diameter part (corresponding to concave part), 61b ... convex part, 62 72 ... Flange part, 63 ... Cylindrical part, 63a ... Recess, 64 ... Circumferential protrusion (corresponding to the first engaging part), 65 ... Insertion hole, 65a ... Fitting hole, 65b ... Circular hole, 70 ... Covered Transmission shaft (corresponding to a rotating body), 70B ... Intermediate transmission shaft, 71 ... Cylindrical part, 71a, 71b ... Split cylindrical part, 73 ... Drum engaging part, 74 ... Case engaging part, 75 ... Drum side convex part ( (Corresponding to the second engaging portion and the first convex portion), 76 Peripheral loose fitting part, 77 ... Collision convex part (corresponding to the third engaging part and the second convex part), 78 ... Projection part, 80 ... Lower case (corresponding to a part of the case body), 81, 91 ... Divided space , 82 ... Flange recess, 83 ... Restriction projection (corresponding to the fourth engagement part and case side engagement part), 84 ... Pocket part, 90 ... Upper case (corresponding to a part of the case body), 92 ... Flange recess , 100 ... push spring (corresponding to the biasing member), 110 ... clutch ball (corresponding to the sliding member), A1, A2 ... opening, R1 ... ladder code (corresponding to the code member), R2 ... lifting code, S ... Interior space

Claims (7)

A gear box that connects a rotating shaft that can be rotated in accordance with the operation at the operation site is provided at one end of the head box
A click unit is provided in the head box apart from the gear box,
The click unit is
A fitting attached to the rotary shaft in a state of rotating integrally with the rotary shaft;
A rotating body that is rotatably attached to the rotating shaft and is disposed adjacent to the fitting body,
A case body having an internal space, and the fitting body and the rotating body are housed in the internal space;
Comprising
The fitting body is provided with a first engaging portion, the rotating body is provided with a second engaging portion and a third engaging portion, and the case body is provided with a fourth engaging portion,
When the fitting body rotates relative to the rotating body by rotation of the rotating shaft, the first engaging portion is provided so as to be able to collide with the second engaging portion, and after the collision, The rotating body rotates with the fitting body,
When the third engagement portion collides with the fourth engagement portion, the rotation of the rotating body in a direction that interferes with the fourth engagement portion is restricted.
A solar shading device characterized by that. The solar radiation shielding device according to claim 1,
The fitting body is provided with a sliding portion, the sliding portion is provided with a convex portion and a concave portion, and the convex portion is provided so as to protrude from the rotation center of the rotating shaft rather than the concave portion.
A solar shading device characterized by that. The solar radiation shielding device according to claim 2,
The sliding member is pressed against the sliding portion in a state where the biasing force is exerted by the biasing member.
A solar shading device characterized by that. The solar radiation shielding device according to claim 3,
At least one pair of the convex portions is provided, and when the rotating body rotates together with the fitting body, the third engaging portion is formed after the sliding member gets over the convex portion to generate a click feeling. Is collided with the fourth engaging portion to restrict the rotational position of the rotating shaft,
A solar shading device characterized by that. The solar radiation shielding device according to claim 4,
A plurality of slats capable of changing the direction along with the rotation of the rotating shaft are supported via a cord member,
At least three of the recesses are provided along the circumferential direction of the fitting body,
In the three recesses, the sliding member is positioned when the slat is in the fully open position, the sliding member is positioned when the slat is in the first fully closed position, The sliding member is located when the slat is in the second fully closed position, which is the position opposite to the first fully closed position,
A solar shading device characterized by that. The solar radiation shielding device according to any one of claims 3 to 5,
The sliding member is housed in the case body,
The sliding member moves in the radial direction of the fitting body in the case body while sliding to the sliding portion as the fitting body rotates.
A solar shading device characterized by that. It is a solar radiation shielding apparatus of any one of Claim 1 to 6,
The fitting body is provided with a circumferential projection corresponding to the first engagement portion,
The case body is provided with a regulation projection corresponding to the fourth engagement portion,
The rotating body collides with the circumferential projection and is provided with a first projection corresponding to the second engagement portion, and collides with the regulation projection and second corresponding to the third engagement portion. Protrusions are provided,
A solar shading device characterized by that.