Electric blind device

Abstract

To provide an electric blind device in which the operation of lowering slats and a bottom rail is simple.SOLUTION: This invention includes a head box 1, slats 4 and a bottom rail 8, a control device 2, and a drive device 3. The drive device 3 has a drive shaft 11, a motor M, winding units 3A and 5b, and stationary tilt units 3B and 5a. The control device 2 has a detection unit 20 and an upper limit position stop control unit 21. When the slats 4 and the bottom rail 8 reach their upper limit positions, the upper limit position stop control unit 21 stops the forward rotation of the motor M and causes it to rotate through a specified angle in the reverse direction, preparing to lower the slats 4 and the bottom rail 8. As a result, this invention simplifies the operation of lowering the slats 4 and the bottom rail 8.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an electric blind system, and more particularly to an STS unit, a horizontal electric blind system equipped with a static tilt unit. [Background technology]

[0002] A horizontal blind device equipped with a static tilt unit is disclosed in Patent Document 1 below.

[0003] The blind device of Patent Document 1 includes a head box, multiple stages of slats and a bottom rail suspended from the head box, and a drive shaft, a winding unit, and a static tilt unit housed within the head box. The winding unit is attached to the drive shaft and tilts the slats and raises and lowers the bottom rail by manually rotating the drive shaft forward and backward. The static tilt unit is also attached to the drive shaft and stops the bottom rail from rising and lowering when the slats are tilted. In other words, the static tilt unit delays the rotation of the winding shaft of the winding unit relative to the rotation of the tilt drum of the winding unit.

[0004] As a result, the blind device of Patent Document 1 can maintain the bottom rail in a stationary state even when the slats are tilted by operating the stationary tilt unit, thereby preventing gaps from forming between the slats at their lowest position and the window frame. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent No. 6998130 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the stationary tilt unit delays the rotation of the take-up shaft relative to the rotation of the tilt drum. For this reason, in the blind device of Patent Document 1, for example, when manually rotating the drive shaft forward to raise the slats and bottom rail to their upper limit positions and then manually rotating the drive shaft in the reverse direction to lower the slats and bottom rail, it is necessary to manually rotate the drive shaft in the reverse direction to rotate the tilt drum in the reverse direction by an amount corresponding to the rotational delay of the take-up shaft.

[0007] As described above, in the blind device of Patent Document 1, when lowering the slats and bottom rail that are located at the upper limit position, it is necessary to manually reverse the rotation of the drive shaft and reverse the rotation of the tilt drum by an amount corresponding to the rotational delay of the winding shaft, making the operation of lowering the slats and bottom rail cumbersome.

[0008] An object of the present invention is to provide an electric blind device in which the operation of lowering the slats and bottom rail is simple. [Means for solving the problem]

[0009] In order to achieve the above object, an electric blind device according to a first aspect of the present invention comprises a head box, a plurality of stages of slats and a bottom rail suspended from the head box, and a control device and a drive device housed within the head box, the drive device having a drive shaft, a motor for rotating the drive shaft forward and backward, a winding unit provided on the drive shaft for tilting the slats and raising and lowering the bottom rail by the forward and reverse rotation of the drive shaft, and a static tilt unit provided on the drive shaft for stopping the raising and lowering of the bottom rail when the slats are tilted, the static tilt unit having an input shaft member directly connected onto the drive shaft and a motor for rotating the input shaft member and an output shaft member that rotates in conjunction with the slats with a predetermined delay amount, and the control device has a detection unit that detects when the slats and the bottom rail have risen to their upper limit position and outputs a detection signal, and an upper limit position stop control unit that stops the slats and the bottom rail at the upper limit position based on the detection signal from the detection unit, and the upper limit position stop control unit has a first control that stops the forward rotation of the motor that raises the slats and the bottom rail when the detection signal from the detection unit is input, and a second control that, after the first control, rotates the motor in the reverse direction by the predetermined delay amount at a predetermined angle so that the slats and the bottom rail remain in the upper limit position without descending.

[0010] In the electric blind device of the present invention, it is preferable that the detection unit is a limit switch that is arranged in the head box and outputs the detection signal when the uppermost slat rises and abuts against it.

[0011] In the electric blind device of this invention, it is preferable that the stationary tilt unit of the cord support device, which enables the raising / lowering and tilting of the slats by one of the drive shafts, is installed outside or inside a support case that rotatably supports a tilt drum and a winding shaft with one of the drive shafts as the rotation axis center, and the winding shaft is configured to rotate in conjunction with the rotation of the tilt drum at the specified delay amount, and comprises: the input shaft member directly connected to the drive shaft; the output shaft member having a shaft portion that transmits the rotation of the input shaft member so that it rotates in conjunction with the rotation of the tilt drum at the specified delay amount, and engaging with the input shaft member with play of a specified rotation angle; a brake member that suppresses rotation of the output shaft member other than the rotation due to rotation transmitted from the input shaft member; and a case member that accommodates the input shaft member, the output shaft member, and the brake member. [Effects of the Invention]

[0012] The electric blind device of the present invention allows for easy operation of lowering the slats and bottom rail. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 is a front view showing a first embodiment of an electric blind device according to the present invention. [Figure 2] FIG. 2 is a block diagram showing the configuration of the electric blind device. [Figure 3] FIG. 3 is a flowchart showing the control of the upper limit position stop control unit of the control device. [Figure 4] FIG. 4 is an explanatory diagram showing a stationary tilt unit of an electric blind device according to a first embodiment of the present invention, and is an exploded perspective view of the stationary tilt unit of the first embodiment as seen from the drive transmission output side. [Figure 5] FIG. 5 is an exploded perspective view of the stationary tilt unit of the first embodiment as viewed from the drive transmission input side. [Figure 6]Fig. 6 is an explanatory diagram showing the stationary tilt unit of Example 1. Fig. 6(A) is an explanatory diagram showing a state in which the brake spring is fitted into the spring case. Fig. 6(B) is an explanatory diagram showing a state in which the output shaft member is viewed from the drive transmission input side. Fig. 6(C) is an explanatory diagram showing a state in which the rotary relay plate is viewed from the drive transmission output side. [Figure 7] FIG. 7 is an explanatory diagram showing the stationary tilt unit of the first embodiment when the slats and the bottom rail are raised. [Figure 8] Fig. 8(A) is an explanatory diagram showing the stationary tilt unit of Example 1 when the slats and bottom rail are positioned at their uppermost positions, and Fig. 8(B) is an explanatory diagram showing the stationary tilt unit of Example 1 when preparing to lower the slats and bottom rail after they are positioned at their uppermost positions. [Figure 9] FIG. 9 is an explanatory diagram showing the stationary tilt unit of the first embodiment when the slats and the bottom rail are lowered. [Figure 10] Fig. 10(A) is an explanatory diagram showing the stationary tilt unit of Example 1 when the slats and bottom rail are located at their lowest positions, and Fig. 10(B) is an explanatory diagram showing the stationary tilt unit of Example 1 when preparing to raise the slats and bottom rail after they are located at their lowest positions. [Figure 11] FIG. 11 is an explanatory diagram showing a second embodiment of a delay unit 5a serving as a stationary tilt unit in an electric blind device according to the present invention. FIG. 11(A) is a perspective view showing a delay unit serving as a stationary tilt unit and a cord support unit serving as a winding unit in the second embodiment. FIG. 11(B) is a cross-sectional view taken along line BB in FIG. 11(A) showing a delay unit serving as a stationary tilt unit and a cord support unit serving as a winding unit in the second embodiment. The delay unit serving as a stationary tilt unit in the second embodiment will be referred to as a delay unit. The cord support unit serving as a winding unit in the second embodiment will be referred to as a cord support unit. [Figure 12]FIG. 12 is an exploded perspective view of the delay unit as seen from the drive transmission input side. [Figure 13] FIG. 13 is an explanatory perspective view showing an assembled state of the delay unit and the cord support unit. [Figure 14] 14(A), (B), and (C) are explanatory diagrams showing the operation of the delay unit. [Figure 15] 15(A), (B), and (C) are explanatory diagrams showing the operation of the slats and the bottom rail. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, one embodiment (example) of an electric blind device according to the present invention and two embodiments (examples) of a static tilt unit of an electric blind device according to the present invention will be described in detail with reference to the drawings. In this specification and the appended claims, the terms front, rear, top, bottom, left, and right refer to the front, rear, top, bottom, left, and right when the electric blind device according to the present invention is installed indoors. The front-rear, up-down, and left-right directions refer to directions when the electric blind device of the present invention is installed indoors. The front-rear direction is the direction seen from the front (inside the room) to the rear (outside the room), the up-down direction is parallel to the vertical direction, and the left-right direction is the horizontal direction. Furthermore, in this specification, with respect to the front view of the horizontal electric blind device shown in Fig. 1, the upper and lower directions are defined as the upward direction (or upper side) and downward direction (or lower side), respectively, in accordance with the hanging direction of the slats, the left direction is defined as the left side of the horizontal electric blind device, and the right direction is defined as the right side of the horizontal electric blind device. Furthermore, the side from which the front view of Fig. 1 is viewed is defined as the front side (inside the room), and the opposite side is defined as the rear side (outside the room), and when referring to the front-to-rear direction of the horizontal electric blind device, it refers to the direction perpendicular to the illustrated plane of the front view of Fig. 1. Furthermore, since the drawings are schematic diagrams showing the electric blind device according to the present invention, only the main components of the electric blind device according to the present invention are shown, and components other than the main components are not shown. Also, some hatching has been omitted.

[0015] (Description of the configuration of the first embodiment) 1 to 3 show a first embodiment of the electric blind device of the present invention. The configuration of an electric blind device 100 according to the first embodiment will be described below with reference to FIGS.

[0016] (Description of the electric blind device 100) 1 is a front view showing an electric blind device 100 according to a first embodiment of the present invention. The electric blind device 100 is a so-called horizontal type electric blind device, and is equipped with multiple upper and lower tiers of slats 4, 41, 42, 43...4N as light blocking sections, a bottom rail 8, and a head box 1. The multiple upper and lower tiers of slats 4, 41, 42, 43...4N may also be referred to as slats 4.

[0017] The upper and lower multiple tiers of slats 4, 41, 42, 43... 4N are suspended and supported by ladder cords 9 hanging down from both the left and right sides of the head box 1. The upper and lower multiple tiers of slats 4, 41, 42, 43... 4N are suspended and supported by ladder cords 9 hanging down from both the left and right sides and the center of the head box 1. The upper and lower multiple tiers of slats 4, 41, 42, 43... 4N rise and fall in accordance with the rise and fall of the bottom rail 8, i.e., move up and down.

[0018] The bottom rail 8 is suspended and supported by the lower ends of ladder cords 9 hanging down from the head box 1 and by the lower ends of lifting cords 10. The bottom rail 8 is raised and lowered by reeling out or reeling in the lifting cords 10. For example, when the bottom rail 8 is lowered, the upper and lower multiple tiers of slats 4, 41, 42, 43... 4N are suspended and supported by the ladder cords 9 from the uppermost slat 41. On the other hand, when the bottom rail 8 is raised, the upper and lower multiple tiers of slats 4, 41, 42, 43... 4N are pushed up by the rising bottom rail 8, starting from the lowermost slat 4N.

[0019] The horizontal electric blind device 100 of embodiment 1 of the present invention shown in Figure 1 enables the raising and lowering of slats 4 using lifting cords 10 and the tilting of slats 4 using ladder cords 9 by rotating a single, i.e., single, square rod-shaped drive shaft 11.

[0020] Within the head box 1, the winding unit 3A and the stationary tilt unit 3B are arranged side by side along the rotational center line O of a single drive shaft 11. The rotational center line O is the center of the rotational shaft. The winding unit 3A and the cord support unit (see cord support unit 5b in Figures 11 and 13) are units that have approximately the same configuration and perform approximately the same functions. Hereinafter, the winding unit 3A may be referred to as the cord support unit. Similarly, the stationary tilt unit 3B and the delay unit (see delay unit 5a in Figures 11 and 13) are units that have approximately the same configuration and perform approximately the same functions. The stationary tilt unit 3B may be referred to as the delay unit.

[0021] The winding unit 3A and the stationary tilt unit 3B constitute a cord support device (see cord support device 5 in Figures 11, 13, and 15) that supports the ladder cord 9 and the lifting cord 10. The winding unit 3A and the stationary tilt unit 3B are disposed on both left and right end sides within the head box 1. In this example, two sets of winding units 3A and stationary tilt units 3B are disposed, but three or more sets may be disposed. Furthermore, in addition to the cord support device that is composed of the winding unit 3A and the stationary tilt unit 3B and that supports the ladder cord 9 and the lifting cord 10, a ladder cord support device that supports only the ladder cord 9 may be disposed within the head box 1.

[0022] The winding unit 3A suspends and supports multiple upper and lower tiers of slats 4, 41, 42, 43...4N via a pair of string-like ladder cords 9 hanging down on the inside and outside of the room, and a bottom rail 8 is suspended and supported at the lower end of each ladder cord 9. The head box 1 is fixed to a mounting surface on the ceiling side via a bracket (not shown).

[0023] A string-like lifting cord 10 hangs down from the winding unit 3A at approximately the center of the front-to-back direction on the underside of the head box 1, and the lower end of the lifting cord 10 is attached to the bottom rail 8 through an insertion hole (not shown) provided at approximately the center of the front-to-back direction of each slat 4.

[0024] For this reason, the winding unit 3A is configured so that a tilt drum (see tilt drum 51 in Figures 11 and 13) having a V-shaped groove for hanging a pair of ladder cords 9 hanging down on the inside and outside of the room, respectively, and a long, cylindrical winding shaft (see winding shaft 52 in Figures 11 and 13) with an inclination that allows the lifting cord 10 to be wound up or unwound, are arranged side by side on a square rod-shaped drive shaft 11 and supported on a support case (see support case 50 in Figures 11 and 13).

[0025] Although not shown in the figure, in this example, an obstacle detection stop device (see obstacle detection stop device 53 in Figures 11 and 13) is provided at the tip of the winding shaft. The obstacle detection stop device is a device that prevents the rotation of the winding shaft that supports the lifting cord 10 when no tension is acting on the lifting cord 10 in the unwinding direction, and has the function of halting the unwinding of the lifting cord 10 and stopping the descent of the slat 4 and bottom rail 8 when the bottom rail 8 collides with an obstacle while the slat 4 is descending, as well as preventing the lifting cord 10 from being wound in the reverse direction.

[0026] The cord support device has a winding unit 3A and a stationary tilt unit 3B arranged side by side on a single drive shaft 11. In the winding unit 3A, the tilt drum is connected to the drive shaft 11 so as not to rotate relative to it, while the winding shaft is supported on a support case and not connected (engaged) to the drive shaft 11. The stationary tilt unit 3B operates so that the winding shaft rotates in conjunction with the rotation of the tilt drum with a predetermined delay. Here, the predetermined delay is a predetermined angle that the tilt drum rotates from when the tilt drum starts to rotate until the winding shaft starts to rotate after a delay.

[0027] The ladder cord support member is simply a device for supporting a tilt drum having V-shaped grooves for suspending a pair of ladder cords 9 hanging down on the inside and outside of the room, respectively.

[0028] A motor M is provided on the right end side inside the head box 1. The motor M is capable of rotating a drive shaft 11 based on an operation signal from an operation device (not shown), for example, an external remote control.

[0029] 1, an external remote control is used to rotate the drive shaft 11, which in turn rotates the tilt drum in the cord support device and the tilt drum in the ladder cord support member, thereby enabling tilt operation to adjust the angle of the slats 4. When the drive shaft 11 is rotated beyond the rotation required for this tilt operation, the delay unit, which is the stationary tilt unit 3B, acts to rotate the take-up shaft in the cord support device with a predetermined delay from the rotation of the tilt drum during the tilt operation, allowing for the lifting and lowering operation of the slats 4.

[0030] (Explanation of Headbox 1) As shown in FIG. 1, the head box 1 includes a battery 71, a battery board 72, a voltage conversion board 73, a receiver 74, a motor M, a square rod-shaped drive shaft 11, an encoder 75, a winding unit 3A, a static tilt unit 3B, and a control device 2.

[0031] The battery 71 is used as a power source for the receiving unit 74, the motor M, the encoder 75, the control device 2, etc. If power is supplied from an outlet, the battery 71 is not necessary.

[0032] The voltage conversion board 73 has a voltage conversion amplifier configured by, for example, an operational amplifier, and boosts the power supplied from the battery 71 to a value required to drive the motor M, and outputs the power to the control device 2.

[0033] The receiving section 74 is, for example, an infrared light receiving diode that receives infrared rays, and receives a signal transmitted from an external remote control.

[0034] One end of the drive shaft 11 of the motor M is connected to the output shaft. The motor M rotates the drive shaft 11 forward and backward. Hereinafter, the rotation of the drive shaft 11 when raising the bottom rail 8 will be referred to as forward rotation, and the rotation of the drive shaft 11 when lowering the bottom rail 8 will be referred to as reverse rotation.

[0035] The encoder 75 outputs a pulse signal to the control device 2 to detect the amount of rotation of the drive shaft 11. As is well known, the encoder 75 has a disk-shaped slit plate and a photointerrupter. The disk-shaped slit plate is supported on the drive shaft 11. The photointerrupter detects multiple slits in the slit plate as the slit plate rotates. When the photointerrupter detects the slits in the slit plate as the slit plate rotates, the encoder 75 outputs a pulse signal to the control board.

[0036] The winding unit 3A is fixed to the drive shaft 11. The winding unit 3A winds the lifting cord 10 around its outer circumferential surface. For example, when the drive shaft 11 rotates forward, the winding unit 3A winds up the lifting cord 10. This draws the lifting cord 10 into the head box 1, causing the bottom rail 8 to rise. When the drive shaft 11 rotates reversely, the winding unit 3A unwinds the lifting cord 10 wound inside the head box 1. This causes the bottom rail 8 to lower.

[0037] The control device 2 is a control board, and is configured to include an arithmetic circuit such as a CPU (Central Processing Unit), and a storage circuit such as a RAM (Random Access Memory).

[0038] (Description of the configuration of the electric blind device 100) Fig. 2 is a block diagram showing the configuration of an electric blind device 100 according to embodiment 1 of the present invention. As shown in Fig. 2, the electric blind device 100 according to embodiment 1 of the present invention comprises the head box 1, the upper and lower multiple stages of slats 4, 41, 42, 43...4N, the bottom rail 8, and the control device 2 and drive device 3 housed in the head box 1.

[0039] (Description of Drive Unit 3) As shown in Figure 2, the drive device 3 has the drive shaft 11, the motor M, the winding unit 3A, and the stationary tilt unit 3B. The motor M rotates the drive shaft 11 forward and reverse. The winding unit 3A is provided on the drive shaft 11, and by the forward and reverse rotation of the drive shaft 11, tilts the slats 4, 41, 42, 43, ... 4N and raises and lowers the bottom rail 8. The stationary tilt unit 3B is provided on the drive shaft 11, and stops the bottom rail 8 from raising and lowering when the slats 4, 41, 42, 43, ... 4N are tilted.

[0040] (Explanation of control device 2) As shown in Fig. 2, the control device 2 has at least a detection unit 20 and an upper limit position stop control unit 21. The detection unit 20 detects when the slats 4, 41, 42, 43... 4N and the bottom rail 8 have risen to their upper limit positions and outputs a detection signal. In this example, the detection unit 20 is a limit switch 200 that is disposed on the underside of the head box 1 and outputs a detection signal when the uppermost slat 41 rises and mechanically abuts against the uppermost slat 41. Note that, although one limit switch 200 is disposed in this example, two or more limit switches 200 may be disposed.

[0041] The upper limit position stop control unit 21 stops the slats 4, 41, 42, 43... 4N and the bottom rail 8 at the upper limit position in response to a detection signal from the limit switch 200, which is the detection unit 20. That is, as shown in Fig. 3, the upper limit position stop control unit 21 has a first control that stops the forward rotation of the motor M that raises the slats 4, 41, 42, 43... 4N and the bottom rail 8 when a detection signal is input from the limit switch 200, which is the detection unit 20, and a second control that, after the first control, rotates the motor M in the reverse direction by a predetermined angle to prepare for the lowering operation of the slats 4, 41, 42, 43... 4N and the bottom rail 8.

[0042] (Explanation of the Function of Embodiment 1) The electric blind device 100 according to the first embodiment is configured as described above, and its operation will be described below with reference to FIG.

[0043] At the start, the motor M is rotated forward using an external remote control. Then, the lifting cord 10 is wound onto the winding unit 3A, the bottom rail 8 rises, and the upper and lower multiple tiers of slats 4, 41, 42, 43... 4N are pushed up onto the rising bottom rail 8, starting with the lowest slat 4N. In this way, the slats 4, 41, 42, 43... 4N and the bottom rail 8 rise.

[0044] In step S1, the upper limit position stop control unit 21 determines whether or not a detection signal has been input from the limit switch 200. If a detection signal has not been input from the limit switch 200, the process returns to step S1. If a detection signal has been input from the limit switch 200, the process proceeds to step S2.

[0045] In step S2, the upper limit position stop control unit 21 performs a first control to stop the forward rotation of the motor M that raises the slats 4, 41, 42, 43...4N and the bottom rail 8, and then the process proceeds to step S3.

[0046] In step S3, the upper limit position stop control unit 21 performs second control by rotating the motor M in the reverse direction by a predetermined angle to prepare for the lowering operation of the slats 4, 41, 42, 43, . . . 4N and the bottom rail 8. This ends the control of the upper limit position stop control unit 21 of the control device 2.

[0047] Here, in step S3, the predetermined angle by which the motor M is rotated in the reverse direction is the angle by which the tilt drum rotates during the period from when the tilt drum starts to rotate until the winding shaft starts to rotate after a delay when the motor M is rotating in the forward direction.

[0048] (Explanation of the Effects of the First Embodiment) The electric blind device 100 according to the first embodiment has the above-described configuration and functions, and the effects thereof will be described below.

[0049] The electric blind device 100 according to this first embodiment includes a head box 1, multiple stages of slats 4, 41, 42, 43... 4N, a bottom rail 8, a control device 2, and a drive device 3. The drive device 3 includes a drive shaft 11, a motor M, a winding unit 3A, and a stationary tilt unit 3B. The control device 2 includes a detection unit 20 and an upper limit position stop control unit 21. When a detection signal is input from the detection unit 20, the upper limit position stop control unit 21 performs a first control operation to stop the forward rotation of the motor M, which raises the slats 4, 41, 42, 43... 4N and the bottom rail 8, and a second control operation to subsequently rotate the motor M in the reverse direction by a predetermined angle to prepare for the lowering of the slats 4, 41, 42, 43... 4N and the bottom rail 8. As a result, the electric blind device 100 of this embodiment 1 can prepare for the lowering operation of the slats 4, 41, 42, 43...4N and bottom rail 8 that have risen and stopped at the upper limit position by the action of the upper limit position stop control section 21 of the control device 2, so that the operation of lowering the slats 4, 41, 42, 43...4N and bottom rail 8 that have stopped at the upper limit position is simple.

[0050] In the electric blind device 100 according to this first embodiment, the detector 20 is a limit switch 200 disposed in the head box 1 that outputs a detection signal when the uppermost slat 41 rises and abuts against it. As a result, the electric blind device 100 according to this first embodiment can reliably detect, using the limit switch 200, that the slats 4, 41, 42, 43... 4N and the bottom rail 8 have risen to their uppermost positions, thereby reliably stopping the rising slats 4, 41, 42, 43... 4N and the bottom rail 8 at their uppermost positions and reliably preparing to lower the slats 4, 41, 42, 43... 4N and the bottom rail 8 that have stopped at their uppermost positions. This allows the electric blind device 100 according to this first embodiment to easily and reliably lower the slats 4, 41, 42, 43... 4N and the bottom rail 8 that have stopped at their uppermost positions.

[0051] (Description of the Structure and Operation of the Static Tilt Unit 3B of the Electric Blind Device According to the First Embodiment of the Invention) Hereinafter, the structure and operation of the stationary tilt unit 3B of the electric blind device according to the first embodiment of the present invention will be described with reference to FIGS.

[0052] Fig. 4 is an explanatory diagram showing a first embodiment of a stationary tilt unit of an electric blind device according to the present invention, and is an exploded perspective view of stationary tilt unit 3B of the first embodiment as seen from the drive transmission output side. Fig. 5 is an exploded perspective view showing the configuration of stationary tilt unit 3B as seen from the drive transmission input side.

[0053] 4 and 5, the stationary tilt unit 3B, together with the winding unit 3A, is arranged in parallel to a single square rod-shaped drive shaft 11, and constitutes a cord support device. The stationary tilt unit 3B supports the tilt drum and winding shaft rotatably with the drive shaft 11 as the rotation axis by a support case. The ladder cord 9 that hangs down from the tilt drum and the lifting cord 10 that hangs down from the winding shaft are led out from lead-out openings provided on the bottom surface of the support case.

[0054] The tilt drum is connected to the drive shaft 11 and supported on the support case so as not to rotate relative to it. On the other hand, the winding shaft is supported on the support case so as not to be connected (disengaged) with the drive shaft 11. An obstacle detection stop device may be provided on the tip of the winding shaft to prevent rotation of the winding shaft supporting the lifting cord 10 when tension in the unwinding direction is not applied to the lifting cord 10. This obstacle detection stop device is supported on the support case so as not to be connected (disengaged) with the drive shaft 11. The case body of the obstacle detection stop device is fixed to the tip of the winding shaft, but the cylindrical cam shaft housed in the case body of the obstacle detection stop device has enough play to stop the unwinding of the lifting cord 10 and stop the descent of the slat 4 and the bottom rail 8 when the bottom rail 8 hits an obstacle while the slat 4 is descending, i.e., has enough rotation to prevent rotation of the winding shaft.

[0055] The stationary tilt unit 3B, which is arranged alongside the support case of the winding unit 3A, is composed of an output shaft member 36, a brake spring 37, a spring case 38, a rotary relay plate 39, an input shaft member 30, and case members 35a and 35b, as shown in Figures 4 and 5.

[0056] The case members 35a and 35b are hollow and substantially cylindrical, and are divided into two in a direction perpendicular to the rotation center line O. The case member 35a on the drive transmission output side is referred to as the first case member 35a, and the case member 35b on the drive transmission input side is referred to as the second case member 35b.

[0057] The first case member 35a has a cylindrical portion 350a. Elastic fitting holes 351a are integrally formed at two locations on the outer peripheral surface of the cylindrical portion 350a, each protruding toward the drive transmission input side. An elastic engagement claw 352a is integrally formed at one location on the outer peripheral surface of the cylindrical portion 350a, each protruding toward the drive transmission input side. Two fitting recesses 353a are formed on the inner peripheral surface of the cylindrical portion 350a. The fitting recesses 353a are disposed between the elastic fitting hole 351a and the elastic engagement claw 352a. A disc portion 354a is integrally formed at an opening on the drive transmission output side of the cylindrical portion 350a. A circular through-hole 355a is formed in the center of the disc portion 354a. Mounting portions 356a are integrally provided at two locations on the drive output side surface of the disc portion 354a around the periphery of the circular through-hole 355a, protruding toward the drive output side.

[0058] The second case member 35b has a cylindrical portion 350b. Elastic fitting protrusions 351b are integrally formed at two locations on the outer peripheral surface of the cylindrical portion 350b, each corresponding to the elastic fitting hole 351a of the first case member 35a. Two fitting recesses 353b are formed on the inner peripheral surface of the cylindrical portion 350b, each corresponding to the fitting recess 353a of the first case member 35a. A disc portion 354b is integrally formed at an opening on the drive transmission input side of the cylindrical portion 350b. A circular through hole 355b is formed in the center of the disc portion 354b. Engagement portions 352b are formed on the peripheral edge of the drive transmission input side surface of the disc portion 354b, corresponding to the elastic engagement claws 352a of the first case member 35a.

[0059] The first case member 35a and the second case member 35b are assembled together by elastically engaging the elastic engaging hole portion 351a of the first case member 35a with the elastic engaging protrusion portion 351b of the second case member 35b, and elastically engaging the elastic engaging claw portion 352a of the first case member 35a with the engaging portion 352b of the second case member 35b.

[0060] The output shaft member 36 has a cylindrical shaft portion 360 with an outer octagonal shape. A disk-shaped flange portion 361 is integrally provided via a circular protrusion 362 on the base end side of the shaft portion 360, on the drive transmission input side. The diameter of the circular protrusion 362 is larger than the outer diameter of the shaft portion 360 but smaller than the diameter of the flange portion 361. A circular recess 363 is provided in the center of the drive transmission input side surface of the flange portion 361. The diameter of the circular recess 363 is larger than the inner diameter of the shaft portion 360 but smaller than the diameter of the flange portion 361. A protrusion 364 is provided on the circumferential portion of the drive transmission input side surface of the flange portion 361, protruding toward the drive transmission input side within a predetermined angle θ1 from the rotation center line O. The area of ​​the circumferential portion of the flange portion 361 excluding the protrusion 364 is the area in which the protrusion piece 392 of the rotation relay plate 39 rotates. The output shaft member 36 is provided with a shaft hole 365 in the direction of the rotation center line O, through which the drive shaft 11 can be inserted in a non-engaged manner.

[0061] The output shaft member 36 is housed within the first case member 35a and the second case member 35b. A shaft portion 360 of the output shaft member 36 protrudes from a circular through-hole 355a of the first case member 35a toward the drive transmission output side. The drive transmission output side surface of a flange portion 361 of the output shaft member 36 rotatably abuts against the drive transmission input side surface of the disc portion 354a of the first case member 35a. The circular protrusion 362 of the output shaft member 36 is rotatably fitted into the circular through-hole 355a of the first case member 35a. The cylindrical shaft portion 360, which has an outer octagonal shape, is rotatably engageable with a cylindrical camshaft having an octagonal shaft hole of an obstacle detection stop device (not shown). Rotation of the output shaft member 36 can be transmitted to rotate synchronously with the camshaft of the obstacle detection stop device.

[0062] The brake spring 37 and spring case 38 function as a braking member that suppresses rotation of the output shaft member 36 other than that caused by rotation transmitted from the input shaft member 30. More specifically, a predetermined braking force is applied to the rotation of the output shaft member 36 transmitted from the camshaft of the obstacle detection and stopping device. In other words, the braking member consisting of the brake spring 37 and spring case 38 functions as a stopper device that locks the rotation of the drive shaft 11 to prevent the slats 4 and bottom rail 8 from descending due to their own weight.

[0063] In order to stably maintain the raised and lowered positions of the slats 4 and prevent the winding shaft from moving freely except during the raising and lowering operation, a pair of ends 371 of the coil-shaped brake spring 37 are fitted so as to engage with both sides of the protrusion 364 of the output shaft member 36. The spring case 38 has a cylindrical shape. Two fitting protrusions 380 are integrally formed on the outer circumferential surface of the spring case 38 in correspondence with the fitting recesses 353a of the first case member 35a and 353b of the second case member 35b.

[0064] As shown in FIG. 6A, the spring case 38 accommodates the coil-shaped brake spring 37 in a contracted state. As a result, the brake spring 37 constantly presses against the inner peripheral surface of the spring case 38, allowing it to rotate relative to the spring case 38 while applying a predetermined braking force. In FIG. 6A, the smaller central angle θ7 between a pair of end portions 371 of the brake spring 37 is approximately 55 degrees, and the larger central angle θ8 is approximately 295 degrees. Furthermore, the central angle θ9 between the pair of end portions 371 of the brake spring 37 is each approximately 5 degrees.

[0065] Meanwhile, the spring case 38, which houses the brake spring 37, is housed in the first case member 35a and the second case member 35b together with the output shaft member 36, and the fitting protrusion 380 of the spring case 38 is non-rotatably fitted into the fitting recess 353a of the first case member 35a and the fitting recess 353b of the second case member 35b. Therefore, the spring case 38 is non-rotatably fixed to the first case member 35a and the second case member 35b. The flange portion 361 of the output shaft member 36 is housed in the spring case 38, and the brake spring 37 is disposed between the drive input side surface of the disc portion 354a of the first case member 35a and the drive output side surface of the flange portion 361 of the output shaft member 36.

[0066] The rotary relay plate 39 is a generally cylindrical member having an outer shape substantially the same as the diameter of the brake spring 37 housed in a reduced diameter state in the spring case 38. A circular plate portion 390 is integrally formed at the opening on the drive transmission output side of the rotary relay plate 39. A circular axial hole 391 having substantially the same diameter as the axial hole 365 of the output shaft member 36 is formed in the center of the circular plate portion 390. The axial hole 391 therefore allows the drive shaft 11 to be inserted through it without engaging with it. Projections 392 are integrally formed on the outer and inner peripheral surfaces of the cylindrical rotary relay plate 39, protruding at a predetermined angle θ2 from the rotation center line O. Meanwhile, a circular protrusion 393 is integrally formed at the center of the drive transmission output side surface of the circular plate portion 390.

[0067] The rotary relay plate 39, together with the output shaft member 36, the brake spring 37, and the spring case 38, is housed within the first case member 35a and the second case member 35b so as to be rotatable relative to each other. The drive output side surface of the circular plate portion 390 of the rotary relay plate 39 rotatably abuts against the drive input side surface of the flange portion 361 of the output shaft member 36. The circular convex portion 393 of the rotary relay plate 39 is rotatably fitted into the circular concave portion 363 of the output shaft member 36. Therefore, the protrusion 392 of the rotary relay plate 39 is relatively rotatable within a range excluding the protrusion 364 of the output shaft member 36. In other words, even if the rotary relay plate 39 rotates, rotation is not transmitted to the output shaft member 36 until the protrusion 392 abuts against the protrusion 364 of the output shaft member 36 via the end 371 of the brake spring 37. After the outer peripheral portion of the protruding piece 392 abuts against the protruding portion 364 , the rotation of the rotation relay plate 39 is transmitted to the output shaft member 36 .

[0068] The input shaft member 30 has a shaft portion 301. A substantially square shaft hole 302 that is directly connected to the drive shaft 11 is provided in the direction of the rotation center line O. A flange portion 303 is provided integrally on the drive transmission input side of the shaft portion 301. A protrusion 304 that protrudes within a range of a predetermined angle θ3 from the rotation center line O is provided integrally on the surface of the flange portion 303 on the drive transmission output side.

[0069] The input shaft member 30, together with the output shaft member 36, the brake spring 37, the spring case 38, and the rotary relay plate 39, are housed in the first case member 35a and the second case member 35b so as to be rotatable relative to each other. The shaft portion 301 of the input shaft member 30 is inserted into the shaft hole 365 of the output shaft member 36 and the shaft hole 391 of the rotary relay plate 39 so as to be rotatable relative to each other. The protrusion 304 of the input shaft member 30 is inserted into the rotary relay plate 39 so as to be rotatable relative to each other. The drive transmission output side surface of the protrusion 304 of the input shaft member 30 abuts against the drive transmission input side surface of the circular plate portion 390 of the rotary relay plate 39 so as to be rotatable relative to each other.

[0070] For this reason, the protrusion 304 of the input shaft member 30 is relatively rotatable within the range excluding the protrusion 392 of the rotary relay plate 39. In other words, even if the input shaft member 30, which is directly connected to the drive shaft 11, rotates, the rotation is not transmitted to the rotary relay plate 39 until the protrusion 304 of the input shaft member 30 abuts against the inner peripheral portion of the protrusion 392 of the rotary relay plate 39. After the protrusion 304 abuts against the protrusion 392, the rotation of the input shaft member 30 is transmitted to the rotary relay plate 39.

[0071] Therefore, the stationary tilt unit 3B applies a delay amount that is the sum of the delay amount between the input shaft member 30 and the rotating relay plate 39 and the delay amount between the rotating relay plate 39 and the output shaft member 36 before transmitting the rotation of the input shaft member 30 to the output shaft member 36.

[0072] The delay between the rotary relay plate 39 and the output shaft member 36 is the angle of reverse rotation of the rotary relay plate 39 in the direction of the solid arrow from the state shown in FIG. 8A to the state shown in FIG. 8B. That is, the delay θ4 is between the larger central angle θ8 between the pair of ends 371 of the brake spring 37 and the protruding piece 392 that protrudes within the range of the predetermined angle θ2. Here, if θ2 ≈ 45 degrees and θ8 ≈ 295 degrees, then the delay θ4 ≈ θ8 - θ2 ≈ 295 degrees - 45 degrees ≈ 250 degrees. The delay between the input shaft member 30 and the rotary relay plate 39 is the delay θ5 between the protruding piece 304 within the range of the predetermined angle θ3 and the protruding piece 392 that protrudes within the range of the predetermined angle θ2. Here, if θ3 ≈ 30 degrees and θ2 ≈ 45 degrees, then the delay amount θ5 ≈ 360 degrees - θ3 - θ2 ≈ 360 degrees - 30 degrees - 45 degrees ≈ 285 degrees. The delay amount until the rotation of the input shaft member 30 is transmitted to the output shaft member 36 is θ4 + θ5 ≈ 250 degrees + 285 degrees ≈ 535 degrees. Therefore, by setting the rotation amount delayed by the stationary tilt unit 3B to be equal to or greater than the angle adjustment range of the slat 4, various delay amounts can be achieved, and the rotation relay plate 39 functions as a delay adjustment member that relays rotation at a predetermined delay amount.

[0073] Of the components of the stationary tilt unit 3B in Example 1, the only component that rotates in direct connection with the drive shaft 11 is the input shaft member 30. Simply by arranging the stationary tilt unit 3B in parallel on the drive shaft 11, the tilt drum can be rotated in conjunction with the rotation of the winding shaft via the obstacle detection stop device with a predetermined delay relative to the rotation of the winding shaft (see Figures 11(B) and 13).

[0074] It is also possible to omit the rotary relay plate 39 and directly connect the input shaft member 30 to the output shaft member 36, thereby creating a delay between the input shaft member 30 and the output shaft member 36. The same output shaft member 36, brake spring 37, spring case 38, and input shaft member 30 can be used in common to create different delays.

[0075] For example, when the rotation relay plate 39 is not used, the delay amount between the input shaft member 30 and the output shaft member 36 is the delay amount θ6 between the larger central angle θ8 between the pair of ends 371 of the brake spring 37 and the protruding piece 304 that protrudes within the range of a predetermined angle θ3. For example, if θ3 ≈ 30 degrees, then the delay amount θ6 ≈ θ8 - θ3 ≈ 295 degrees - 30 degrees ≈ 265 degrees. Therefore, by setting the rotation amount delayed by the stationary tilt unit 3B to be equal to or greater than the angle adjustment range of the slat 4, various delay amounts can be achieved.

[0076] Furthermore, by preparing a rotary relay plate 39 that changes the shape (predetermined angle θ2) of the protrusion piece 392 to produce multiple types of delay amounts, it is possible to achieve multiple types of delay amounts simply by changing the rotary relay plate 39.

[0077] The case members 55a and 55b are configured to house the output shaft member 36, brake spring 37, spring case 38, rotation relay plate 39, and input shaft member 30, fitted together in the direction of the rotation center line O of the drive shaft 11. That is, the first case member 35a is provided with an elastic fitting hole 351a and an elastic engagement claw 352a, while the second case member 35b is provided with an elastic fitting protrusion 351b and an engagement portion 352b. The first case member 35a and the second case member 35b are integrally assembled by elastically fitting the elastic fitting hole 351a of the first case member 35a with the elastic fitting protrusion 351b of the second case member 35b and elastically engaging the elastic engagement claw 352a of the first case member 35a with the engagement portion 352b of the second case member 35b. In this way, the stationary tilt unit 3B can be assembled without using screws or the like, which contributes to overall ease of assembly and low cost.

[0078] Furthermore, although an example has been described in which the shaft portion 360 of the output shaft member 36 and the camshaft of the obstacle detection stopping device are engaged in an octagonal shape, from the viewpoint of improving ease of assembly, it is preferable to use an engaging shape with more sides. That is, by configuring the shaft portion 360 of the output shaft member 36 in a polygonal shape and configuring the camshaft of the obstacle detection stopping device to engage with this, assembly can be achieved with a slight rotation operation, improving ease of assembly.

[0079] Furthermore, in the case of a horizontal electric blind that uses a cord support device having a stationary tilt unit 3B, the tilt drum and winding shaft can be rotated using a single drive shaft 11, but if tilt operation without raising or lowering the slats 4 is desired, the bottom rail 8 will not be raised or lowered by the tilt operation. Also, if the bottom rail 8 is not at the lowest position, the folded portion of the slats 4 will not rise before tilting, which will not impair operability.

[0080] For example, when a predetermined number of horizontal slats 4 are folded into the bottom rail 8 in the rest state shown in Fig. 15(A), adjusting the angle of the slats 4 by tilting as shown in Fig. 15(B) does not cause the bottom rail 8 to rise or fall. Also, as shown in Fig. 15(C), there is no loss of operability as the folded portion of the slats 4 rises before tilting during tilting.

[0081] The operation of the stationary tilt unit 3B of the first embodiment will be described below with reference to FIGS.

[0082] With the slats 4 and bottom rail 8 in their lowest positions, the motor M is rotated forward to rotate the drive shaft 11 forward. This causes the input shaft member 30 to rotate forward, and the protrusion 304 of the input shaft member 30 abuts against the inner circumferential portion of the protrusion 392 of the rotation relay plate 39. As a result, the rotation relay plate 39 rotates forward in the counterclockwise direction as indicated by the solid arrow in FIG. 7 in conjunction with the forward rotation of the input shaft member 30. The protrusion 392 of the rotation relay plate 39 abuts against the right end 371 of the brake spring 37 and presses the end 371. This loosens the brake spring 37, causing the output shaft member 36 to rotate forward. The forward rotation of the output shaft member 36 causes the bottom rail 8 to rise from its lowest position, and as the bottom rail 8 rises, the slats 4 also rise.

[0083] When the slat 4 and bottom rail 8 are positioned at their upper limit positions, the control device 2 stops the forward rotation of the motor M and causes the motor M to rotate in the reverse direction. This causes the input shaft member 30 to rotate in the reverse direction by a delay amount θ5 ≈ 285 degrees, and the protrusion 304 of the input shaft member 30 contacts the inner peripheral portion of the protrusion 392 of the rotation relay plate 39. As a result, the rotation relay plate 39 rotates in the reverse direction in the clockwise direction as indicated by the solid arrows in Figures 8(A) and (B) in conjunction with the reverse rotation of the input shaft member 30. The protrusion 392 of the rotation relay plate 39 rotates in the reverse direction from the right end 371 of the brake spring 37 shown in Figure 8(A) to the left end 371 of the brake spring 37 shown in Figure 8(B), i.e., by a delay amount θ4 ≈ 250 degrees. As a result, while the motor M is rotating in reverse by the delay amount θ4+θ5≒250 degrees+285 degrees≒535 degrees, the slats 4 and bottom rail 8 do not descend and remain in their upper limit positions.

[0084] At this time, the protrusion 364 of the output shaft member 36 is positioned between the right end 371 and the left end 371 of the brake spring 37, so the weight of the slat 4 and bottom rail 8 is supported by the braking member made up of the brake spring 37 and the spring case 38. Because the slat 4 is in a folded state, the slat 4 does not tilt even if the stationary tilt unit 3B or the drive shaft 11 rotates.

[0085] With the slats 4 and bottom rail 8 at their uppermost positions, the motor M is rotated in the reverse direction, causing the drive shaft 11 to rotate in the reverse direction. This causes the input shaft member 30 to rotate in the reverse direction, and the protrusion 304 of the input shaft member 30 abuts against the inner circumferential portion of the protrusion 392 of the rotation relay plate 39. As a result, the rotation relay plate 39 rotates in the reverse direction, as indicated by the solid arrow in FIG. 9 , in conjunction with the reverse rotation of the input shaft member 30. The protrusion 392 of the rotation relay plate 39 abuts against the left end 371 of the brake spring 37 and presses the end 371. This loosens the brake spring 37, causing the output shaft member 36 to rotate in the reverse direction. The reverse rotation of the output shaft member 36 causes the bottom rail 8 to descend from its uppermost position. As the bottom rail 8 descends, the slats 4 also descend, and the slats 4 and bottom rail 8 are positioned at their lowest positions.

[0086] At this time, the slats 4 are in the deployed state, so they tilt as the drive shaft 11 rotates. On the other hand, the output shaft member 36 does not rotate due to the braking action of the braking member composed of the brake spring 37 and spring case 38, so the slats 4 and bottom rail 8 do not move up or down. The above is the operation of the stationary tilt unit 3B of the first embodiment.

[0087] The stationary tilt unit 3B of Example 1 allows the rotation of the tilt drum and winding shaft of the slat 4 to be operated with a single drive shaft 11, and solves the problem that when a tilt operation without raising or lowering the slat 4 is desired, the bottom rail 8 rises or falls due to the tilt operation, and when the bottom rail 8 is not at the lowest position, the folded part of the slat 4 rises and then tilts during the tilt operation.It also improves assembly, contributes to miniaturization, versatility, reduced parts management burden, and cost reduction.

[0088] (Explanation of the Structure and Operation of Delay Unit 5a as a Static Tilt Unit of the Second Embodiment of the Present Invention) The structure and operation of the delay unit 5a as a static tilt unit according to the second embodiment of the present invention will be described below with reference to FIGS.

[0089] Figure 11 is an explanatory diagram showing a delay unit 5a as a stationary tilt unit of an electric blind device according to a second embodiment of the present invention. Figure 11(A) is a perspective view showing the delay unit 5a as a stationary tilt unit and the cord support unit 5b as a winding unit of the second embodiment of the present invention. Figure 11(B) is a cross-sectional view taken along line BB in Figure 11(A) showing the delay unit 5a as a stationary tilt unit and the cord support unit 5b as a winding unit of the second embodiment of the present invention. The delay unit 5a serving as the stationary tilt unit in the second embodiment of the present invention will be referred to as delay unit 5a, and the cord support unit 5b serving as the winding unit in the second embodiment of the present invention will be referred to as cord support unit 5b. FIG. 12 is an exploded perspective view showing the configuration of the delay unit 5a, as seen from the drive transmission input side. FIG. 13 is an explanatory perspective view showing the assembled state of the delay unit 5a and the cord support unit 5b.

[0090] 11(A) are arranged side by side on a single square rod-shaped drive shaft 11, and constitute a cord support device 5. Cord support unit 5b supports tilt drum 51 and take-up shaft 52 by a support case 50 so that they can rotate around drive shaft 11 as the rotation axis. Ladder cord 9 (see FIG. 1) to be suspended from tilt drum 51 and lifting cord 10 (see FIG. 1) to be suspended from take-up shaft 52 are led out from lead-out opening 50a provided on the bottom surface of support case 50.

[0091] 11(B), tilt drum 51 is connected to drive shaft 11 so as to be non-rotatable relative to it, and is supported by support case 50. On the other hand, winding shaft 52 is supported by support case 50 so as to be unconnected (disengaged) with respect to drive shaft 11. An obstacle detection stop device 53 is provided on the tip end of winding shaft 52 to prevent rotation of winding shaft 52 supporting lifting cord 10 when no tension acts on lifting cord 10 in the unwinding direction, and this obstacle detection stop device 53 is also supported by support case 50 so as to be unconnected (disengaged) with respect to drive shaft 11. The case body of the obstacle detection stop device 53 is fixed to the tip side of the winding shaft 52, but the cylindrical cam shaft 531 housed in the case body of the obstacle detection stop device 53 has the necessary play (i.e., the amount of rotation to prevent rotation of the winding shaft 52) ​​to stop the rewinding of the lifting cord 10 and stop the descent of the slat 4 and bottom rail 8 when the bottom rail 8 collides with an obstacle while the slat 4 is descending, and is capable of rotating together with the rotation of the winding shaft 52.

[0092] The delay unit 5a, which is arranged in parallel with the support case 50 of the cord support unit 5b, is composed of an output shaft member 56, a brake spring 57, a spring case 58, a rotary relay plate 59, an input shaft member 60, and case members 55a and 55b, as shown in Figure 12.

[0093] The output shaft member 56 has a cylindrical shaft portion 561 with an outer hexagonal shape and a substantially cylindrical shaft 562 that protrudes from the base end (drive transmission input side) of the shaft portion 561 via a flange 567 having a cylindrical shaft portion 568 formed thereon. A protrusion 564 that protrudes from the outer periphery of a portion of the cylindrical shaft 562 toward the drive transmission input side within a predetermined angle (angle α1 described below) from the center of the shaft is provided. The shaft portion 568 and flange 567 of the output shaft member 56 are supported by a circular opening 559c and an opening side surface 559a on one side surface (drive transmission output side) of the case members 55a and 55b, respectively, so as to be relatively rotatable. In this example, the cylindrical shaft 562 and the protrusion 564 are formed to protrude in a continuous shape, but the cylindrical shaft 562 and the protrusion 564 may protrude separately. A recessed area excluding the protrusion 564 on the outer periphery of the cylindrical shaft 562 is formed as an engagement receiving portion 563 which becomes a movable range for a protrusion piece 592 of the rotation relay plate 59 described later. The shaft portion 561 and the cylindrical shaft 562 are formed with a shaft hole 565 through which the drive shaft 11 can be inserted without engaging. The cylindrical shaft portion 561 having an outer hexagonal shape is engageable with a cylindrical cam shaft 531 having a hexagonal shaft hole 531a of the obstacle detection stop device 53 so as to rotate integrally with the cam shaft 531 (see FIG. 13), and the rotation of the output shaft member 56 can be transmitted to rotate synchronously with the cam shaft 531 of the obstacle detection stop device 53 (see FIG. 11(B)).

[0094] The brake spring 57 and the spring case 58 function as a braking member that suppresses rotation of the output shaft member 56 other than that caused by rotation transmitted from the input shaft member 60. More specifically, a predetermined braking force is applied to the rotation of the output shaft member 56 transmitted from the camshaft 531 of the obstacle detection stop device 53. In other words, the braking member consisting of the brake spring 57 and the spring case 58 functions as a stopper device that locks the rotation of the drive shaft 11 to prevent the slats 4 and the bottom rail 8 from descending due to their own weight.

[0095] In order to stably maintain the raised and lowered positions of the slats 4 and to prevent the winding shaft 52 from moving freely except during the raising and lowering operation, a pair of ends 571 of the coil-shaped brake spring 57 are fitted so as to engage with both sides of the protrusion 564 of the output shaft member 56. The spring case 58 houses the coil-shaped brake spring 57 in a contracted state, so that the brake spring 57 always presses against the inner circumferential surface of the spring case 58, allowing the brake spring 57 to rotate relative to the spring case 58 but applying a predetermined braking force. Meanwhile, the spring case 58 is fitted into the housing portions 556 of the case members 55a and 55b with a pair of recesses 582 formed in a part of the spring case 58 non-rotatably engaged by the protrusions 557 formed on each of the case members 55a and 55b, and therefore the spring case 58 is fixed non-rotatably.

[0096] The rotary relay plate 59 is a generally cylindrical member having an outer shape substantially the same as the diameter of the brake spring 57 housed in the spring case 58 in a reduced diameter state, and is provided with a shaft hole 591 having substantially the same diameter as the shaft hole 565 of the output shaft member 56. Accordingly, the drive shaft 11 can be inserted through the shaft hole 591 without engaging with it. The rotary relay plate 59 is a generally cylindrical member, and more specifically, a protrusion 592 is provided on the distal end surface of the rotary relay plate 59 near the periphery thereof, protruding from the shaft center within a predetermined angle (angle α2, described below). The distal end surface of the rotary relay plate 59 is positioned so as to be able to abut against the base end surface of the output shaft member 56 through the inside of the brake spring 57 (see FIG. 11(B)), and the rotary relay plate 59 is housed in the housing portions 555 of the case members 55a, 55b so as to be relatively rotatable. For this reason, the protrusion piece 592 on the tip surface side of the rotary relay plate 59 can rotate relative to the output shaft member 56 as long as it is within the range of the engagement receiving portion 563 of the recessed area excluding the protrusion portion 564 on the output shaft member 56. In other words, even if the rotary relay plate 59 rotates, the rotation is not transmitted to the output shaft member 56 until the protrusion piece 592 abuts against the protrusion portion 564 on the output shaft member 56 via the end portion 571 of the brake spring 57. However, after this abutment, the rotation of the rotary relay plate 59 is transmitted to the output shaft member 56.

[0097] Furthermore, groove-shaped engagement receivers 593 are formed on the base end surface of the rotation relay plate 59 around the axial hole 591, excluding some rotation receivers 594. The rotation receivers 594 are formed within a range of a predetermined angle (angle α3, described below) from the axial center of the axial hole 591. In this example, groove-shaped engagement receivers 593 are used to form the rotation receivers 594, but they do not have to be groove-shaped as long as they perform the same function.

[0098] The input shaft member 60 includes a cylindrical shaft portion 601 having a substantially square shaft hole 602 directly connected to the drive shaft 11, and a flange 604 on which a cylindrical shaft portion 606 is formed, and a protrusion 603 protruding from the shaft center of the shaft portion 601 within a range of a predetermined angle (angle α4 described below) parallel to the shaft portion 601. The protrusion 603 is formed via the flange 604 on which the cylindrical shaft portion 606 is formed. With the drive transmission output side of the flange 604 of the input shaft member 60 positioned so as to be able to abut against the drive transmission input side of the rotation relay plate 59 (see FIG. 11(B)), the shaft portion 606 and flange 604 of the input shaft member 60 are supported for relative rotation by the circular opening 559d and the housing portion 555 at the drive transmission input side ends of the case members 55a and 55b, respectively. The shaft portion 601 is also able to support the shaft hole 565 of the output shaft member 56 and the shaft hole 591 of the rotation relay plate 59.

[0099] For this reason, the protrusion 603 of the input shaft member 60 can rotate relative to the rotary relay plate 59 as long as it is within the range of the engagement receiving portion 593 of the rotary relay plate 59. In other words, even if the input shaft member 60, which is directly connected to the drive shaft 11, rotates, the rotation is not transmitted to the rotary relay plate 59 until the protrusion 603 abuts against the rotation receiving portion 594 of the rotary relay plate 59. However, after the abutment, the rotation of the input shaft member 60 is transmitted to the rotary relay plate 59.

[0100] Therefore, the delay unit 5a applies a delay amount that is the sum of the delay amount between the input shaft member 60 and the rotary relay plate 59 and the delay amount between the rotary relay plate 59 and the output shaft member 56 before transmitting the rotation of the input shaft member 60 to the output shaft member 56.

[0101] For example, as shown in FIG. 14A, the delay between the rotary relay plate 59 and the output shaft member 56 is β between the protruding portion 564 that protrudes within an angle α1 and the protruding piece 592 that protrudes within an angle α2. For example, if α1 ≈ 60 degrees and α2 ≈ 90 degrees, the delay β is β ≈ 210 degrees. Also, as shown in FIG. 14B, the delay between the input shaft member 60 and the rotary relay plate 59 is γ between the rotation receiving portion 594 that protrudes within an angle α3 and the protruding piece 603 that protrudes within an angle α4. For example, if α3 ≈ 60 degrees and α4 ≈ 60 degrees, the delay γ is γ ≈ 240 degrees. The delay until the rotation of the input shaft member 60 is transmitted to the output shaft member 56 is β + γ ≈ 450 degrees. Therefore, by setting the amount of rotation delayed by the delay unit 5a to be greater than or equal to the angle adjustment range of the slat 4, various delay amounts can be achieved, and the rotating relay plate 59 functions as a delay adjustment member that rotates and relays at a predetermined delay amount.

[0102] Of the components of the delay unit 5a in the first embodiment, the only component that rotates in direct connection with the drive shaft 11 is the input shaft member 60. Simply by arranging the delay unit 5a in parallel on the drive shaft 11, the delay unit 5a can be rotated in conjunction with the rotation of the winding shaft 52 via the obstacle detection stop device 53 at a predetermined delay amount relative to the rotation of the tilt drum 51 (see Figures 13 and 11(B)).

[0103] 13, case members 55a and 55b of delay unit 5a are each formed with a claw 558 on the side wall on the drive transmission output side for gripping a protrusion 50b provided on support case 50 of cord support unit 5b. This allows delay unit 5a of Example 1 to be stably assembled to cord support unit 5b on drive shaft 11 in a manner that allows it to be easily attached and detached. Note that, although shaft portion 561 of output shaft member 56 of delay unit 5a is engaged with shaft hole 531a of camshaft 531 of obstacle detection stop device 53 to be connected so as to be rotatable together, if an excessive load is applied to the rotation of drive shaft 11 even when obstacle detection stop device 53 is operating, an undesired force acts to disengage obstacle detection stop device 53 from support case 50, and an undesired force also acts in a direction to release the connected state, which may cause a malfunction. Therefore, in order to mitigate the undesirable force that would cause the connection to separate when an excessive load is applied, it is preferable to provide a stopper wall 50j on the support case 50, as shown in Figure 4, that stops the camshaft 531 from moving upward.

[0104] In addition, the rotary relay plate 59 can be omitted, and the input shaft member 60 can be directly connected to the output shaft member 56, thereby creating a delay between the input shaft member 60 and the output shaft member 56. The same output shaft member 56, brake spring 57, spring case 58, and input shaft member 60 can be shared to create different delay amounts.

[0105] 14(C), when the rotation relay plate 59 is not used, the delay amount between the input shaft member 60 and the output shaft member 56 is the delay amount η between the protruding portion 564 that protrudes within the range of angle α1 and the protruding piece 603 that protrudes within the range of angle α4. For example, if α1 ≈ 60 degrees and α4 ≈ 60 degrees, the delay amount η ≈ 240 degrees. Therefore, by setting the rotation amount delayed by the delay unit 5a to be equal to or greater than the angle adjustment range of the slat 4, various delay amounts can be achieved.

[0106] Furthermore, by preparing a rotary relay plate 59 that generates multiple types of delay amounts by changing the shape (angle α2) of the protrusion piece 592 or the shape (angle α3) of the rotary receiving portion 594, it is possible to realize multiple types of delay amounts simply by changing the rotary relay plate 59.

[0107] Case members 55a and 55b are adapted to house output shaft member 56, brake spring 57, spring case 58, rotation relay plate 59, and input shaft member 60 by fitting them together in a direction perpendicular to drive shaft 11 (in the front-to-rear direction in this example). More specifically, fit-receiving portions 551 having protrusions 553 are formed on the upper and lower surfaces of case member 55a, and fit-receiving pieces 552 having holes 554 that can fit with protrusions 553 and that engage with fit-receiving portions 551 are formed on the upper and lower surfaces of case member 55b. In other words, when two case components are fitted together to form one case, if they are fitted together parallel to the drive shaft 11, the rotation of the drive shaft 11 will weaken the fitting force, which could result in quality problems, and so a combination using screws or the like will be necessary. However, by configuring the components to be fitted together perpendicular to the drive shaft 11 as in this embodiment, a strong fitting force is obtained against the rotation of the drive shaft 11, so no combination using screws or the like is required, which contributes to easier assembly and lower costs overall.

[0108] Furthermore, in this second embodiment, an example has been described in which the shaft portion 561 of the output shaft member 56 and the cam shaft 531 of the obstacle detection stopping device 53 are engaged in a hexagonal shape, but from the viewpoint of improving ease of assembly, it is preferable to use an engaging shape with more sides. That is, by configuring the shaft portion 561 of the output shaft member 56 to have a polygonal shape and configuring the cam shaft 531 of the obstacle detection stopping device 53 to engage with this, assembly can be achieved with a slight rotation operation, improving ease of assembly.

[0109] Furthermore, in the case of a horizontal electric blind that uses a cord support device 5 having a delay unit 5a, the tilt drum 51 and winding shaft 52 can be rotated using a single drive shaft 11, but if tilt operation without raising or lowering the slats 4 is desired, the bottom rail 8 will not be raised or lowered by the tilt operation. Also, if the bottom rail 8 is not at the lowest position, the folded portion of the slats 4 will rise before tilting, so operability is not impaired.

[0110] For example, when a predetermined number of horizontal slats 4 are folded into the bottom rail 8 in the rest state shown in Fig. 15(A), adjusting the angle of the slats 4 by tilting as shown in Fig. 15(B) does not cause the bottom rail 8 to rise or fall. Also, as shown in Fig. 15(C), there is no loss of operability as the folded portion of the slats 4 rises before tilting during tilting.

[0111] Furthermore, as shown in Fig. 12, the case members 55a and 55b are formed with upper corners 550a each having a rectangular recess. Therefore, when the delay unit 5a is installed in the head box 1, the upper corners 550a of the delay unit 5a supported by the lower corners 550b engage with the upper end of the head box 1 (see Fig. 15), thereby suppressing rattles in the front-to-back and up-to-down directions. In addition, the case members 55a and 55b of the delay unit 5a are formed with claws 558, which grip the protrusions 50b of the support case 50 of the cord support unit 5b, thereby suppressing rattles in the left-to-right directions.

[0112] Furthermore, in this second embodiment, an example has been described in which the shaft portion 561 of the output shaft member 56 is engaged with the cam shaft 531 of the obstacle detection stop device 53, but the functions and effects of the present invention can be achieved even if the shaft portion 561 is engaged with the winding shaft 52 without going through the obstacle detection stop device 53.

[0113] The stationary tilt unit 3B of Example 2 allows the rotation of the tilt drum 51 and winding shaft 52 of the slat 4 to be controlled with a single drive shaft 11, and solves the problem that when a tilt operation without raising or lowering the slat 4 is desired, the bottom rail 8 is raised or lowered by the tilt operation, and when the bottom rail 8 is not at the lowest position, the folded part of the slat 4 rises and then tilts during the tilt operation.It also improves assembly, contributes to miniaturization, versatility, reduced parts management burden, and cost reduction.

[0114] The stationary tilt unit and delay unit as a stationary tilt unit of the electric blind device of this invention may be other than the stationary tilt unit 3B of Example 1 and the delay unit as a stationary tilt unit 5a of Example 2. For example, the delay unit as a stationary tilt unit of the blind device of Patent Document 1 may be used.

[0115] The present invention has been described above using specific examples of Embodiment 1, Example 1, and Example 2, but the present invention is not limited to the aforementioned examples of Embodiment 1, Example 1, and Example 2, and various modifications are possible within the scope of the technical concept. For example, in the above-mentioned example of Example 2, an example in which the obstacle detection stop device 53 is used has been described, but the present invention is not limited to this, and any form in which the device is directly or indirectly engaged with the winding shaft 52 can exert the functions and effects of the present invention.

[0116] [Note] The contents of the above-described embodiments can be understood, for example, as follows.

[0117] (1) Headbox 1; a plurality of stages of slats 4, 41, 42, 43...4N and a bottom rail 8 suspended and supported from the head box 1; A control device 2 and a drive device 3 housed in the head box 1; Equipped with The drive unit 3 is A drive shaft 11; a motor M for rotating the drive shaft 11 forward and backward; winding units 3A, 5b provided on the drive shaft 11, which tilt the slats 4, 41, 42, 43, ..., 4N and raise and lower the bottom rail 8 by forward and reverse rotation of the drive shaft 11; a stationary tilt unit (3B, 5a) provided on the drive shaft (11) for stopping the up-and-down movement of the bottom rail (8) when the slats (4, 41, 42, 43, ..., 4N) are tilted; and The stationary tilt units 3B and 5a are input shaft members 30, 60 directly connected to the drive shaft 11; output shaft members 36, 56 that rotate in conjunction with the rotation of the input shaft members 30, 60 with a predetermined delay (θ4 + θ5 ≒ 535 degrees); and The control device 2 is a detection unit 20 that detects a state in which the slats 4, 41, 42, 43, . . . 4N and the bottom rail 8 are raised to their upper limit positions and outputs a detection signal; an upper limit position stop control unit 21 that stops the slats 4, 41, 42, 43...4N and the bottom rail 8 at the upper limit position in response to the detection signal from the detection unit 20; and The upper limit position stop control unit 21 a first control for stopping the forward rotation of the motor M that lifts the slats 4, 41, 42, 43, . . . 4N and the bottom rail 8 when the detection signal is input from the detection unit 20; a second control, after the first control, for rotating the motor M in the reverse direction by a predetermined angle and the predetermined delay amount (θ4+θ5≒535 degrees) so that the slats 4, 41, 42, 43...4N and the bottom rail 8 are maintained in the upper limit position without descending; having It is characterized by:

[0118] The stationary tilt units 3B, 5a stop the up and down movement of the bottom rail 8 when the slats 4, 41, 42, 43, ..., 4N are tilted. Specifically, the input shaft member 30 rotates forward while idling by an amount corresponding to a delay (θ4 + θ5 ≈ 535 degrees) until the forward rotation of the input shaft member 30 is transmitted to the output shaft member 36, thereby stopping the up and down movement of the bottom rail 8. Therefore, when the bottom rail 8 is located at the upper limit position, there is a delay (θ4 + θ5 ≈ 535 degrees) between the input shaft member 30 and the output shaft member 36 until the reverse rotation of the input shaft member 30 is transmitted to the output shaft member 36. Therefore, as described above, when the bottom rail 8 reaches its upper limit position, the forward rotation of the motor M, which raises the slats 4, 41, 42, 43...4N and the bottom rail 8, is stopped, and the motor M is rotated in the reverse direction by a predetermined angle.Therefore, when a lowering operation is performed, the lowering operation of the slats 4, 41, 42, 43...4N and the bottom rail 8 is quickly started. The electric blind device 100 according to this first embodiment includes a head box 1, multiple stages of slats 4, 41, 42, 43... 4N, a bottom rail 8, a control device 2, and a drive device 3. The drive device 3 includes a drive shaft 11, a motor M, a winding unit 3A, and a stationary tilt unit 3B. The control device 2 includes a detection unit 20 and an upper limit position stop control unit 21. When a detection signal is input from the detection unit 20, the upper limit position stop control unit 21 performs a first control operation to stop the forward rotation of the motor M, which raises the slats 4, 41, 42, 43... 4N and the bottom rail 8, and a second control operation to reversely rotate the motor M by a predetermined angle after the first control operation to prepare for the lowering of the slats 4, 41, 42, 43... 4N and the bottom rail 8. As a result, the electric blind device 100 of this embodiment 1 can prepare for the lowering operation of the slats 4, 41, 42, 43...4N and bottom rail 8 that have risen and stopped at the upper limit position by the action of the upper limit position stop control section 21 of the control device 2, so that the operation of lowering the slats 4, 41, 42, 43...4N and bottom rail 8 that have stopped at the upper limit position is simple.

[0119] (2) The detection unit 20 is a limit switch 200 disposed in the head box 1 and outputs the detection signal when the uppermost slat 41 rises and abuts against it. It is characterized by:

[0120] In the electric blind device 100 according to this first embodiment, the detector 20 is a limit switch 200 disposed in the head box 1 that outputs a detection signal when the uppermost slat 41 rises and abuts against it. As a result, the electric blind device 100 according to this first embodiment can reliably detect, using the limit switch 200, that the slats 4, 41, 42, 43... 4N and the bottom rail 8 have risen to their uppermost positions, thereby reliably stopping the rising slats 4, 41, 42, 43... 4N and the bottom rail 8 at their uppermost positions and reliably preparing to lower the slats 4, 41, 42, 43... 4N and the bottom rail 8 that have stopped at their uppermost positions. This allows the electric blind device 100 according to this first embodiment to easily and reliably lower the slats 4, 41, 42, 43... 4N and the bottom rail 8 that have stopped at their uppermost positions.

[0121] (3) The stationary tilt unit 3B, 5a of the cord support device that enables the lifting and tilting of the slats 4, 41, 42, 43, . . . 4N by one of the drive shafts 11, One of the drive shafts 11 is installed on the outside or inside of a support case 50 that rotatably supports a tilt drum 51 and a winding shaft 52 with a rotation center line O, and the winding shaft 52 is configured to rotate in conjunction with the rotation of the tilt drum 51 with the predetermined delay amount, The input shaft members 30, 60 are directly connected to the drive shaft 11; output shaft members 36, 56 which have a shaft portion that transmits rotation of the input shaft members 30, 60 so as to rotate in conjunction with the rotation of the input shaft members 30, 60 with the predetermined delay amount, and which engage with the input shaft members 30, 60 with a predetermined rotational angle of play; braking members 37, 38, 57, 58 for suppressing rotation of the output shaft members 36, 56 other than rotation due to rotation transmitted from the input shaft members 30, 60; case members 35a, 35b, 55a, 55b that accommodate the input shaft members 30, 60, the output shaft members 36, 56, and the braking members 37, 38, 57, 58; Equipped with It is characterized by:

[0122] In the stationary tilt unit 3B of Example 1 and the delay unit 5a as a stationary tilt unit of Example 2, the rotation of the tilt drum 51 and winding shaft 52 of the slat 4 can be controlled with a single drive shaft 11, and this solves the problem that when a tilt operation without raising and lowering the slat 4 is desired, the bottom rail 8 rises and falls due to the tilt operation, and the problem that when the bottom rail 8 is not at the lowest position, the folded part of the slat 4 rises and then tilts during the tilt operation. This also improves assembly, contributes to miniaturization, versatility, reduced parts management burden, and lower costs. [Explanation of symbols]

[0123] 100 Electric blind device 1 head box 10 Lifting cord 11 Drive shaft 2. Control device 20 Detector 200 limit switch 21 Upper limit position stop control section 3. Drive unit 3A Winding Unit 3B Static Tilt Unit 30 Input shaft member 35a First case member as a case member 35b Second case member as case member 36 Output shaft member 37 Brake spring as a braking member 38 Spring case as a damping member 39 Rotating relay plate 4, 41, 42, 43...4N Slat 5 Cord support device 5a Delay unit as static tilt unit 5b Cord support unit as winding unit 50 Support Case 51 Tilt Drum 52 Winding shaft 53 Obstacle detection stop device 55a, 55b Case members 56 Output shaft member 57 Brake spring as a braking member 58 Spring case as a damping member 59 Rotating relay plate 60 Input shaft member 71 Battery 72 Battery board 73 Voltage conversion board 74 Light receiving section 75 Encoder 8 Bottom Rail 9 Ladder Code Medium motor O Rotation center line θ1 Predetermined angle θ2 Predetermined angle θ3 Predetermined angle θ4 delay amount θ5 delay amount θ6 delay amount θ7 Smaller central angle θ8 Larger central angle

Claims

1. The head box and a plurality of stages of slats and a bottom rail suspended from the head box; a control device and a drive device housed within the headbox; Equipped with The drive device is A drive shaft; a motor for rotating the drive shaft forward and backward; a winding unit provided on the drive shaft, which tilts the slats and raises and lowers the bottom rail by forward and reverse rotation of the drive shaft; a stationary tilt unit provided on the drive shaft for stopping the bottom rail from moving up and down when the slat is tilted; and The static tilt unit is an input shaft member directly connected to the drive shaft; an output shaft member that rotates in conjunction with the rotation of the input shaft member with a predetermined delay; and The control device a detector that detects when the slats and the bottom rail are raised to their upper limit positions and outputs a detection signal; an upper limit position stop control unit that stops the slat and the bottom rail at the upper limit position in response to the detection signal from the detection unit; and The upper limit position stop control unit a first control that stops the forward rotation of the motor that lifts the slats and the bottom rail when the detection signal is input from the detection unit; a second control, after the first control, for rotating the motor in the reverse direction by the predetermined delay amount, which is a predetermined angle and maintains a state in which the slats and the bottom rail are not lowered and are positioned at the upper limit position; having An electric blind device.

2. The detection unit is a limit switch that is disposed in the head box and outputs the detection signal when the uppermost slat rises and abuts against the head box.

2. The electric blind device according to claim 1.

3. The stationary tilt unit of the cord support device enables the slats to be raised and lowered and tilted by one drive shaft, one of the drive shafts is installed outside or inside a support case that rotatably supports the tilt drum and the winding shaft with one of the drive shafts as a rotation axis center, and the winding shaft is configured to rotate in conjunction with the rotation of the tilt drum at the predetermined delay amount, the input shaft member directly connected to the drive shaft; the output shaft member having a shaft portion that transmits rotation of the input shaft member so as to rotate in conjunction with the rotation of the input shaft member with the predetermined delay amount, and engaging with the input shaft member with a predetermined rotational angle of play; a braking member that suppresses rotation of the output shaft member other than rotation transmitted from the input shaft member; a case member that houses the input shaft member, the output shaft member, and the braking member; Equipped with 3. The electric blind device according to claim 1 or 2.

Images