TWI767446B - Electric curtains - Google Patents

Abstract

An electric curtain includes a curtain body, a driving device and a control device. The driving device is respectively connected with the curtain body and the control device, so that the driving device is commanded by the control device to drive the curtain body to move, wherein the control device includes a position detection The module, a microcontroller and a detection module, the position detection module detects the position when the lower end of the curtain body stops, and compares and judges the obtained position information with a comparison position in the microcontroller, A corresponding relationship is obtained, and when the detection module detects that the curtain body is moved by the first external force and is judged as the first trigger by the microcontroller, the microcontroller commands the drive device to start according to the corresponding relationship and the first trigger, so as to Drive the lower end of the curtain body to move.

Description

Electric curtains

The present invention is related to curtains; in particular, it refers to an electric curtain that uses a motor to drive the curtain body to unfold or fold.

The purpose of setting curtains is to cover the windows of buildings to achieve the effects of concealment, heat insulation and shading. A conventional curtain includes an upper beam, a curtain body, and a shaft, a reducer, a motor and a control device located in the upper beam, wherein the curtain body is located under the upper beam and is connected to the shaft through a shaft. The pull rope is driven by the shaft rod, and the reducer is connected between the shaft rod and the rotating shaft of the motor. The motor is controlled by the control device, so that the rotating shaft drives the curtain body to fold or unfold through the reducer and the shaft.

During the process of the curtain body being folded, if the curtain body is restrained by an interference object (such as a person or an object), or is pulled by the interference object and cannot rise smoothly, in addition to possibly causing damage to the interference object, the curtain body is restrained. The braking force will also be transmitted back to the motor through the shaft, causing the motor to be restrained by a braking force different from the rotation direction, resulting in damage to the curtain body, the curtain power transmission member or the motor. On the contrary, in the process of the curtain body unfolding, the curtain body continues to descend, and even if the curtain body encounters an interference, the curtain body will not be restrained by a braking force, and it will continue to descend. Before the command, it will continue to rotate, so that the curtain body will continue to expand, thus causing damage to the interference object, or because the bottom of the curtain body is blocked by the interference object, causing the curtain body to unfold unevenly, resulting in the remaining pull rope on the shaft or the tension of the curtain body Uneven, disordered or loose, and it is impossible to perform the next extension smoothly.

In addition, when the curtain is fully folded or fully unfolded, the motor can automatically stop rotating. Therefore, before the curtain starts to be used, the upper and lower limit settings corresponding to the fully folded or fully unfolded curtain body must be set first, that is, in the When the curtain body is fully folded or fully unfolded, manually drive the control device to control the motor to stop, and use a position detector linked with the rotating shaft of the motor to detect the position information corresponding to the current state of the curtain, and store it in the control device Inside. When the next time the position detector is linked by the rotating shaft of the motor to rotate to the recorded position, the control device issues a command to stop the motor from rotating. However, in this way of manually setting the upper and lower limits, in addition to setting the curtains before using the curtains, after a period of use, the upper and lower limits are easily lost due to the accumulation of errors of the position detector. Accuracy must be reset, increasing the trouble in use.

In the currently known curtain design, the motor is arranged on the upper beam, and the control board that controls the operation of the motor is arranged near the motor, so as to match the human-machine interface (such as a controller that communicates with the control board of the motor in a wired or wireless manner, Remote control or mobile phone, etc.), so that the user can control the motor at a place far away from the upper beam, so that the curtain body of the curtain is driven by the motor to fold, unfold, or stop. However, when the user wants to control the curtain body, but the wired HMI is damaged, or the motor cannot be successfully controlled by the wireless HMI (for example, the HMI is lost, the HMI has no power or is damaged, etc.), That is, it is impossible to control the motor to drive the curtain body to act, resulting in inconvenience in use.

The purpose of the present invention is to provide an electric curtain. When the curtain body is triggered, the motor is controlled to start to rotate, and the curtain body driven by the motor can move corresponding to the trigger.

An electric curtain provided by the present invention includes a curtain body, a driving device and a control device, wherein the driving device is activated by the command of the control device to drive the lower end of the curtain body to move upward or downward in a moving direction Move, make the curtain body fold or unfold, the driving device is stopped by the command of the control device, so that the lower end of the curtain body stops moving; the control device at least includes: a position detection module, which detects the position of the curtain body. a lower end position to obtain a position information; a control module, at least comprising a microcontroller, when the lower end of the curtain body stops moving, the microcontroller performs the position information representing the position of the lower end of the curtain body in the movement The direction relative to a comparison position is judged to obtain a corresponding relationship; a detection module detects that the curtain body is moved by a first external force to obtain a first detection result; the microcontroller according to the When the first detection result determines that the curtain body is subject to a first trigger, the microcontroller instructs the driving device to start according to the corresponding relationship and the first trigger, so as to drive the lower end of the curtain body to move.

With the electric curtain of the present invention, when the curtain body is directly controlled by an external force and it is judged to be a trigger to the curtain body, the curtain body can be actuated corresponding to the control, without the need to control the action of the curtain body through the man-machine interface, and it is more convenient to use. for convenience.

The present invention provides a method for setting the lower limit of an electric curtain. The electric curtain includes a curtain body, a driving device and a control device, wherein the driving device is activated by the command of the control device to drive the lower end of the curtain body to a Moving between a top end and a bottom end of the opening of the building, the driving device is stopped by the command of the control device, so that the lower end of the curtain body stops moving; the setting method includes: starting the driving device to rotate in a rotation direction, and Drive the lower end of the curtain body to move in the direction of the opening of the building toward the bottom end; a detection module detects that the lower end of the curtain body is blocked by the bottom end; instructs the driving device to stop; Perform an upward moving step at least once, wherein the upward moving step includes instructing the driving device to restart and rotate in a direction opposite to the rotation direction, so that the driving device is rotated a distance and then instructed to stop the driving device; the detection module When it is detected that the lower end of the curtain body is no longer blocked by the bottom end in the at least one upward moving step, a position detection module detects the position of the lower end of the curtain body after the driving device is stopped, and determines the position of the lower end of the curtain body. The position of the lower end of the curtain body is set as the lower limit.

The present invention further provides a method for setting the lower limit of an electric curtain. The electric curtain includes a curtain body, a driving device and a control device, wherein the driving device is activated by the command of the control device to drive the lower end of the curtain body to a Moving between a top end and a bottom end of the opening of the building, the driving device is stopped by the command of the control device, so that the lower end of the curtain body stops moving; the setting method includes: starting the driving device to rotate in a rotation direction, and Drive the lower end of the curtain body to move in the direction of the opening of the building toward the bottom end; a detection module detects that the lower end of the curtain body is blocked by the bottom end; instructs the driving device to stop and start again, and in the opposite direction to the The direction of the rotation direction rotates; when the detection module detects that the lower end of the curtain body is no longer blocked by the bottom end, it commands the driving device to stop, so that the lower end of the curtain body stops moving; a position detection module detects The position of the lower end of the curtain body, and the position of the lower end of the curtain body is set as the lower limit position.

With the above-mentioned lower limit setting method of the electric curtain, the lower end of the curtain body is the bottom end closest to the opening of the building, which can avoid the generation of penetrating light.

The present invention further provides an electric curtain, comprising an upper beam, a curtain body, a rotating member, a driving device, and a control device, wherein the curtain body is arranged under the upper beam; the rotating member is arranged on the upper beam , and is connected to the curtain body to drive the curtain body to unfold or fold; the driving device is arranged on the upper beam and is connected to the rotating member to drive the rotating member to rotate; the control device is arranged on the upper beam, And connect the driving device, wherein when the control device sets the driving device to rotate in a first rotation direction, driving the lower end of the curtain body to move in a first moving direction and encounters an interference object, the control device will rotate with a first rotation direction. The first operation mode sets the driving device to rotate in a second rotation direction, driving the lower end of the curtain body to move in a second movement direction, the second rotation direction is different from the first rotation direction, and the second movement direction is different in the first moving direction.

In this way, the lower end of the curtain body can be prevented from continuously contacting the interference object, thereby causing damage to the curtain body or the interference object.

〔this invention〕

100: Electric Curtains

10: Upper beam

10a: Accommodating space

102: Outlet hole

12: Curtain body

12a: lower end

122: Lower beam

14: Turning parts

142: Shaft

144: Reel

16: Drive device

18: Shell

20: Motor

202: Spindle

22: Reducer

24: Control device

26: Control Module

262: Microcontroller

2622: Processing Unit 2622

2624: Memory Unit 2624

28: Drive circuit

30: Detection module

32: Speed detection element

34: Magnets

36: Detection component

38: Torsion spring

382: Winding Department

384: Extension Arm

384a: Bend segment

40: switch

402: Actuator

404: Ontology

42: Fixed seat

422: accommodating hole

424: Long slotted hole

44: Drawstring

46: Detection component

48: switch

482: Actuator

484: Ontology

50: Limit Ring

52: Encoder

54: Current detector

56: Wireless signal receiving circuit

58: Gravity Sensor

60: Wireless signal sending circuit

62: Piezoelectric element

200: Building Openings

201: Top

202: Bottom

D1: The first rotation direction

D2: The second rotation direction

DN: proximity distance

DS: return distance

DS1: first return distance

DS2: Second return distance

L1: first distance

L2: Second distance

L3: third distance

O: Interfering substance

P0: Predetermined location

Pa: Compare position

P1: The first predetermined position

P2: Second predetermined position

R: reference plane

S11: Steps

S12: Steps

S13: Steps

S131: Steps

S132: Step

T1: The first scheduled time

T2: Second scheduled time

T3: The third scheduled time

T4: Fourth scheduled time

FIG. 1 is a perspective view of an electric curtain according to a first preferred embodiment of the present invention.

FIG. 2 is a partial exploded perspective view of the motorized curtain according to the above preferred embodiment.

FIG. 3 is a schematic diagram of the connection of the control device according to the above preferred embodiment.

FIG. 4 is a schematic diagram of the microcontroller according to the above preferred embodiment.

FIG. 5 is a graph showing the relationship between the rotational speed of the rotating member and the time of the above preferred embodiment.

FIG. 6 is a perspective view of the left-side detection component of the above preferred embodiment.

FIG. 7 is a perspective view of the detection element on the right side of the above preferred embodiment.

FIG. 8 is an exploded perspective view of the detection component on the left side of the above preferred embodiment.

FIG. 9 is a schematic view showing that the pull cord is positioned at a predetermined position.

FIG. 10 is a schematic diagram showing that the winding portion of the torsion spring presses against the switch.

FIG. 11 is a schematic diagram showing the detection element of the second preferred embodiment of the present invention.

FIG. 12 is a schematic view showing that the actuating rod of the switch is retracted into the body.

FIG. 13 is a schematic diagram of the connection of the control device according to the third preferred embodiment of the present invention.

FIG. 14 is a flow chart of the control method of the electric curtain according to the third preferred embodiment of the present invention.

FIG. 15 is a schematic diagram of detecting the first trigger condition according to the third preferred embodiment of the present invention.

FIG. 16 is a schematic view showing that the lower end of the curtain body is close to the second predetermined position.

FIG. 17 is a schematic diagram showing that the lower end of the curtain body is close to the first predetermined position.

FIG. 18 is a schematic diagram of detecting the second trigger condition according to the third preferred embodiment of the present invention.

FIG. 19 is another schematic diagram of detecting the second trigger condition according to the third preferred embodiment of the present invention.

FIG. 20 is a schematic diagram showing that the lower end of the curtain body moves upward by a first distance.

FIG. 21 is a schematic diagram of detecting the third trigger condition according to the third preferred embodiment of the present invention.

FIG. 22 is a schematic diagram of detecting the fourth and fifth trigger conditions according to the third preferred embodiment of the present invention.

FIG. 23 is a schematic diagram of the connection of the control device according to the fourth preferred embodiment of the present invention.

FIG. 24 is a schematic diagram of detecting the third trigger condition according to the fourth preferred embodiment of the present invention.

FIG. 25 is a schematic diagram of the connection of the control device according to the fifth preferred embodiment of the present invention.

FIG. 26 is a schematic diagram of the arrangement position of the gravity sensor and the wireless signal sending circuit according to the fifth preferred embodiment of the present invention.

FIG. 27 is a schematic diagram of detecting the first trigger condition according to the fifth preferred embodiment of the present invention.

FIG. 28 is a schematic diagram of detecting the fourth and fifth trigger conditions according to the fifth preferred embodiment of the present invention.

FIG. 29 is a schematic diagram of the arrangement position of the piezoelectric element and the wireless signal transmitting circuit according to the sixth preferred embodiment of the present invention.

FIG. 30 is a schematic diagram of detecting the first trigger condition according to the sixth preferred embodiment of the present invention.

FIG. 31 is a schematic diagram of detecting the fourth and fifth trigger conditions according to the sixth preferred embodiment of the present invention.

FIG. 32 is a schematic diagram showing that the lower end of the curtain body moves up a return distance after encountering an interference object.

FIG. 33 is a schematic diagram showing that the lower end of the curtain body encounters an interference object at a position less than the proximity distance.

FIG. 34 is a schematic diagram showing that the lower end of the curtain body encounters an interference object at a position greater than the adjacent distance.

Figure 35 is a schematic view showing that the lower end of the curtain body meets the bottom end of the building opening.

FIG. 36 is a schematic diagram showing that the lower end of the curtain body moves upward by a return distance.

In order to describe the present invention more clearly, preferred embodiments are given and described in detail with the drawings as follows. Referring to FIGS. 1 to 10 , the electric curtain 100 according to the first preferred embodiment of the present invention includes an upper beam 10 , a curtain body 12 , a rotating member 14 , a driving device 16 and a control device 24 , Wherein: the upper beam 10 is a frame body and has an accommodating space 10a inside. The curtain body 12 is located below the upper beam 10 , and the curtain body 12 has a lower end 12 a away from the upper beam 10 .

The rotating member 14 is disposed in the accommodating space 10a of the upper beam 10. The rotating member 14 includes a shaft 142 and two reels 144. The shaft 142 extends along the long axis of the upper beam 10. The two coils The shafts 144 are fixedly sleeved on the shaft rods 142 and are spaced apart from each other at a distance, and each of the spools 144 is wound with a pulling rope 44 , and one end of each of the pulling ropes 44 is fixed to each of the spools 144 .

The other end of each pull cord 44 passes through a wire outlet hole 102 at the bottom of the upper beam 10 and extends downward through the curtain body 12 to the lower end 12 a of the curtain body 12 . The lower end 12 a of the curtain body 12 includes a lower beam 122 , and the two pull cords 44 are connected to the lower beam 122 . In practice, the number of the spool 144 and the number of the pulling rope 44 may also be one or more.

The driving device 16 is disposed in the accommodating space 10 a of the upper beam 10 and includes a casing 18 , a motor 20 and a reducer 22 located in the casing 18 , and the motor 20 is coupled to the shaft through the reducer 22 142, wherein the rotating shaft 202 of the motor 20 is connected to the reducer 22, the reducer 22 is connected to one end of the shaft 142, and the reducer 22 is a planetary gear reducer in this embodiment. The motor 20 drives the shaft 142 to rotate, and simultaneously drives the spool 144 fixedly sleeved on the shaft 142 , so that the spool 144 releases or retracts the pull cord 44 to drive the curtain body 12 to unfold or fold. The length of each pull cord 44 driven by the motor 20 and fully released from each reel 144 is slightly greater than the length of the curtain body 12 when it is fully unfolded. It can be understood that, in the embodiment, the length of each pull cord 44 being released from the corresponding spool 144 refers to the length of the pull cord 44 being released from the spool 144 when actuated by the motor 20 , not the self. The distance from the reel 144 to the lower end 12 a of the curtain body 12 .

The control device 24 is disposed in the accommodating space 10a of the upper beam 10, and is electrically connected to the motor 20. The control device 24 is used to control the rotation of the motor 20 to drive the curtain body 12 to unfold or fold, and, The control device 24 controls the motor 20 to stop rotating when the moving speed of the lower end 12a of the curtain body 12 decreases for a predetermined time. Thereby, when the curtain body 12 is unfolded and finally reaches the fully unfolded position, or when the curtain body 12 is retracted and finally reaches the fully retracted position, or when the curtain body 12 encounters resistance in the process of unfolding or folding, the curtain body 12 The moving speed of the lower end 12a will decrease and last for the predetermined time. The control device 24 can stop the movement of the curtain body 12, so that the curtain body 12 can stay in the fully expanded or fully collapsed state, and can also avoid the curtain body 12 when the curtain body 12 is expanded or closed. During the closing process, it will continue to hit the interference object or cause damage to the electric curtain 100.

In this embodiment, the control device 24 includes a control module 26 and a detection module 30. The control module 26 controls the motor 20 through a drive circuit 28 to drive the shaft 142 of the rotating member 14 along a first The rotation direction D1 or a second rotation direction D2 rotates. When the shaft rod 142 of the rotating member 14 rotates along the first rotation direction D1, the fixed sleeve on the shaft rod 142 rotates. The reel 144 is driven and rotated by the shaft rod 142 to rewind the pull rope 44 to make the curtain body 12 retract. When the shaft rod 142 of the rotating member 14 rotates along the second rotation direction D2, the fixed sleeve is placed on the The spool 144 on the shaft 142 is driven and rotated by the shaft 142 to release the pull cord 44 , so that the curtain body 12 is unfolded.

The detection module 30 is electrically connected to the control module 26, and the detection module 30 can detect the rotational speed of the rotating member 14 or the rotating shaft 202 of the motor 20, and the control module 26 according to the detected rotational speed, When the curtain body 12 is folded, the lower end 12a of the curtain body 12 driven by the motor 20 is judged whether the moving speed of the lower end 12a of the curtain body 12 is lower than the previous moving speed and lasts for a predetermined time, so as to judge whether the curtain body 12 has completely reached the folded position or is in the folded position. In the process of combining, it encounters the resistance of interfering substances. The detection module 30 can further detect whether any of the drawstrings 44 deviates from a predetermined position P0, and the control module 26 determines that the lower end 12a of the curtain body 12 is moved according to the drawstrings 44 that have completely deviate from the predetermined position P0 The speed is lower than the previous moving speed and lasts for the predetermined time, so as to be used as a basis for judging whether the curtain body 12 has completely reached the deployment position or encounters the resistance of the interference object during the deployment process. The control module 26 controls the motor 20 to stop rotating when judging that the curtain body 12 has been fully retracted and reached the fully retracted position, has been fully deployed and reached the fully extended position, or encountered resistance during the unfolding or retracting process. In one or more embodiments, the control module 26 at least includes a microcontroller 262 , as shown in FIG. 4 , the microcontroller 262 at least includes a processing unit 2622 and a storage medium such as the memory unit 2624 , but not limited to this, the memory unit 2624 can also be independent of the microcontroller and coupled to the microcontroller. The memory unit 2624 includes a tangible computer-readable/storage medium, such as random access memory (RAM), read only memory (ROM), flash memory, optical disk, magnetic disk, solid state drive, etc., to store An instruction set that can be read and executed by a computer. When the processing unit 2622 executes the instruction set, it performs various judgments according to the detection of the detection module 30 and controls the motor 20 to perform corresponding operations. In this embodiment, the microcontroller 262 is connected with the detection module 30. In addition, the microprocessor 262 can also be connected with a position detection module, It is connected to a wireless signal receiving circuit 56 , and the functions of the position detection module and the wireless signal receiving circuit 56 will be described in other subsequent embodiments. It should be noted that the predetermined time referred to in this embodiment can be defined in the control device 24 as required, but in principle, it should last for a sufficient time so that the control device 24 can recognize the moving speed of the lower end 12a of the curtain body 12 indeed decreased or stopped.

The mechanism for judging whether the curtain body 12 is completely retracted or encounters resistance during the retracting process will be described later: the detection module 30 includes a rotational speed detecting element 32, and the rotational speed detecting element 32 is used for detecting rotation In this embodiment, the rotational speed detecting element 32 is a Hall sensor, and a magnet 34 can be disposed on the rotating element 14 . As shown in FIG. 3 , the magnet 34 is disposed on the shaft 142 . When the shaft 142 rotates, the rotation speed of the shaft 142 is measured through the magnetic field induction calculation when the magnet 34 is opposite to the rotation speed detecting element 32 .

The control module 26 can preset the lower limit rotation speed of the rotating member 14. Please refer to FIG. 5. When the control module 26 controls the motor 20 to drive the rotating member 14 to rotate along the first rotation direction D1 (ie, the curtain body 12 folded), the control module 26 receives the signal of the rotational speed detected by the rotational speed detecting element 32, when the curtain body 12 has been completely folded and the windable part of the drawstring 44 has been completely wound on the reel 144 or when the curtain body 12 is resisted during the folding process, causing the pull cord 44 to be pulled by the resistance and unable to be wound, the rotation of the rotating member 14 will be resisted, so that the rotation speed of the rotating member 14 will decrease, thereby reducing the rotation speed of the rotating member 14. The moving speed of the lower end 12a of the curtain body 12 driven by the element 14, and the control module 26 controls the rotation speed when the rotation speed detected by the detection module 30 is lower than the lower limit rotation speed for the predetermined time. The motor 20 stops rotating. In this way, the motor 20 can be controlled to stop rotating when the curtain body 12 is fully folded, and the motor 20 can also be controlled to stop rotating when the curtain body 12 encounters interference during the folded process. If the rotation speed detected by the detection module 30 returns to be higher than the lower limit rotation speed within the predetermined time, the control module 26 determines that the curtain body 12 The interference object is only encountered temporarily, and the moving speed of the lower end 12a of the curtain body 12 is not affected by the interference object, and the curtain body 12 can still be folded normally. Therefore, the control module 26 still controls the motor 20 through the driving circuit 28 Keep turning.

In practice, the magnet 34 can also be disposed on the spool 144 or the rotating shaft 202 of the motor 20 , but the rotating speed of the rotating shaft 202 of the motor 20 is higher than the rotating speed of the rotating member 14 . Therefore, the magnet 34 is disposed on the motor 20 . When the rotating shaft 202 of the motor 20 is set, the lower limit rotation speed needs to be set corresponding to the rotating speed of the rotating shaft 202 of the motor 20 . In addition, the rotational speed detecting element 32 may also be an encoder or a resolver disposed on the rotating shaft 202 of the motor 20 , which can detect the rotational speed of the rotating shaft 202 of the motor 20 correspondingly.

The above is the mechanism for judging whether the curtain body 12 has been completely folded in this embodiment, or whether the curtain body 12 encounters the resistance of the interference object during the folding process. The mechanism by which the body 12 encounters the resistance of the distractor during deployment.

Please refer to FIGS. 1 to 3 and FIGS. 7 to 10 , the detection module 30 further includes two sets of detection components 36 , and the two detection components 36 are located at positions close to the two reels 144 and are symmetrically arranged on the left and right sides. (Refer to FIG. 6 and FIG. 7 ), the structures of the detection elements 36 are the same, and the detection element 36 on the left shown in FIG. 6 is used as an example for description hereinafter.

The detection component 36 includes an elastic member such as a torsion spring 38 and a switch 40 . The torsion spring 38 includes a winding portion 382 and two extending arms 384 connected to the winding portion 382 . One end has a bent section 384a. The winding portion 382 is located above the wire outlet hole 102 of the upper beam 10 , and the pull cord 44 is passed through the winding portion 382 and then out of the wire outlet hole 102 . The winding portion 382 forms a restraining loop for restraining the pull cord 44 therein. The switch 40 has an actuating rod 402 and a body 404 , and the switch 40 is electrically connected to the control module 26 . The coiled portion 382 of the torsion spring 38 presses the actuating rod 402 in the normal state (when no external force is applied) and makes the actuating rod 402 trigger the body 404 of the switch 40 .

In this embodiment, the detection component 36 further includes a fixing seat 42 , the fixing seat 42 is fixed on the upper beam 10 , the torsion spring 38 and the switch 40 are disposed on the fixing seat 42 . The fixing seat 42 has an accommodating hole 422 and two long slot holes 424 . The accommodating hole 422 is located above the wire outlet hole 102 . On the short axis of the upper beam 10 , the accommodating hole 422 is located in the two long slots. Between the holes 424 , the long axis of each long slot hole 424 is parallel to the short axis of the upper beam 10 . The winding portion 382 is located in the accommodating hole 422 , and the bent section 384 a of each of the extending arms 384 penetrates into each of the long slot holes 424 . When the winding portion 382 is pulled to move along the long axis of the upper beam 10 , each of the bending segments 384 a can move along the long axis of each of the long slot holes 424 .

Please refer to FIG. 9 , during the unfolding process of the curtain body 12 , the unfolded length of the curtain body 12 is equal to the length of the drawstring 44 driven by the motor 20 , and the drawstring 44 is in a tensioned state. When the pull cord 44 is located at the predetermined position P0 in the wire outlet hole 102, and forces the winding portion 382 in the direction away from the actuating rod 402, the torsion spring 38 is forced to deviate from the original position and accumulates a spring force. When the main body 404 of the switch 40 is not actuated by the actuating rod 402, the control module 26 can control the motor 20 through the driving circuit 28 to make the rotating member 14 rotate along the first rotating direction D1 or the second rotating direction D1. The direction D2 rotates to drive the curtain body 12 to fold or unfold.

Please refer to FIG. 10 , since the pull cord 44 is driven by the motor 20 and is completely released from the spool 144, the length of the pull cord is slightly greater than the length of the curtain body when the curtain body 12 is fully unfolded. Therefore, when the curtain body 12 is fully unfolded and the curtain When the moving speed of the lower end 12a of the body 12 has been reduced to zero, the pull rope 44 driven by the motor 20 and released from the spool 144 will continue to be released for a predetermined time (at this time, the lower end 12a of the curtain body 12 is moved continuously. The movement speed is zero for a predetermined time). When the pull cord 44 is driven by the motor 20 to be completely released, the pull cord 44 cannot be limited by the length of the curtain body 12 . The torsion spring 38 returns to the original position through the accumulated elastic force, and drives the pull rope 44 to deviate from the predetermined position. P0. When the winding portion 382 returns to the original position, the winding portion 382 presses the actuating rod 402 to trigger the switch 40 , so that the switch 40 changes from a first state to a second state, for example, from an open circuit to short circuit. The control module 26 controls the motor 20 to stop rotating after the switch 40 is activated, so that the motor can automatically stop when the curtain body 12 is fully unfolded. When the control module 26 wants to control the motor 20 to rotate in the direction of closing the curtain body 12 , the control module 26 ignores the current state of the switch 40 and winds up the pull rope 44 . When the extended length is equal to the unfolded length of the curtain body 12 , the pull cord 44 drives the lower end 12 a of the curtain body 12 to move in the closing direction.

During the unfolding process of the curtain body 12, if the curtain body 12 encounters an interference object, the moving speed of the lower end 12a of the curtain body 12 is reduced. The speed of movement of 12a will be at a reduced speed (even zero) for a predetermined time as the pull cord 44 is released. When the length of the pull cord 44 driven by the motor 20 and released is greater than the length of the curtain body 12 at this time, the pull cord 44 is loosened (that is, the force exerted by the pull cord 44 on the torsion spring 38 is eliminated), and the torsion spring 38 recovers to the original position, and drive the pulling rope 44 to deviate from the predetermined position P0. When the torsion spring 38 returns to the original position, the winding portion 382 moves in the direction of the actuating rod 402 and presses the actuating rod 402 to trigger the switch 40 , and the switch 40 changes from a first state to A second state, such as a transition from an open circuit to a short circuit. The control module 26 controls the motor 20 to stop rotating after the switch 40 is activated, so as to stop the curtain body from unfolding. In this way, it can be avoided that the curtain body 12 continues to unfold when it encounters an interference object during the unfolding process, thereby damaging the curtain body 12 or the interference object.

When the curtain body 12 is unfolded and the interference object stops, if the control module 26 wants to control the motor 20 to rotate toward the direction of the curtain body 12 being folded, the control module 26 will ignore the current state of the switch 40 When the pull cord 44 is rolled up by the motor 20 until the released length is equal to the unfolded length of the curtain body 12, the pull cord 44 drives the lower end 12a of the curtain body 12 to move in the closing direction.

11 and FIG. 12 are the detection component 46 of the second preferred embodiment of the present invention, which can also be applied to the electric window shade 100 of the first embodiment. The detection component 46 includes a switch 48 and a limit ring 50. The switch 48 has an actuating rod 482 and a body 484 , the restraining ring 50 is connected to the actuating rod 482 , and the pulling rope 44 passes through the restraining ring 50 . When the pull rope 44 is in a tensioned state, the pull rope 44 is located at the predetermined position P0, the pull rope 44 exerts a force on the limit ring 50 in a direction away from the switch 48, and the limit ring 50 pulls the actuating rod 482 to make the switch 48 is in a first state (eg, open). If the curtain body 12 reaches full deployment or encounters an interference and continues for a period of time, the length of the pull cord 44 released by the motor 20 is greater than the length of the curtain body, which will make the pull cord 44 slack, and the pull cord 44 will be slack. The force exerted by the rope 44 on the restraining ring 50 is eliminated. At this time, the elastic member (not shown) inside the body 484 of the switch 48 drives the actuating rod 482 to move in the opposite direction, and the switch 48 is in a second state ( For example, a short circuit), and the restraint ring 50 pulls the pull cord 44 away from the predetermined position P0. The control module 26 controls the motor 20 to stop rotating when the switch 40 is in the second state. In this way, the rotation of the motor 20 can be stopped when the curtain body 12 is fully unfolded, or when the curtain body 12 encounters an interference during the unfolding process.

According to the above, the electric curtain of the present invention can be controlled by the control device to control the motor to stop rotating when the moving speed of the lower end of the curtain body decreases and lasts for a predetermined time. When the curtain body encounters resistance during the unfolding or folding process, the motor can be stopped to stop the curtain body from continuing to move; in order to reduce the need to set the upper and lower limit positions The components and procedures are used, and when the curtain body encounters interference during the movement of the curtain, it can avoid continuous collision with the interference or damage to the electric curtain. In addition, in each of the above-mentioned embodiments, the number of the detection components of the detection module is described as two. In practice, the number of the detection components may also be at least one.

Other embodiments will be provided below. The structure of the electric curtain of the above embodiments can be applied to implement the control method of the electric curtain of the present invention, so that the user can directly manipulate the curtain body to expand, collapse, or stop the curtain body.

FIG. 13 is a partial schematic diagram of the electric curtain according to the third embodiment of the present invention, which has substantially the same structure as that of the first embodiment. The difference is that the electric curtain of this embodiment further includes an encoder 52 as an example. In the position detection module, the encoder 52 is arranged on the rotating shaft 202 of the motor 20 and is electrically connected to the microcontroller 262 of the control module 26. When the rotating shaft 202 of the motor 20 rotates, the encoder 52 is driven to act to transmit the corresponding quantity The pulse wave is sent to the control module 26 . It can be pre-defined that when the curtain body 12 is fully unfolded, the position of the lower end 12a of the curtain body 12 is a first predetermined position P1 (refer to FIG. 1 ), and when the curtain body 12 is fully retracted, the position of the lower end 12a of the curtain body 12 is A second predetermined position P2. The lower end 12a of the curtain body 12 moves up or down in a moving direction, that is, the lower end 12a of the curtain body 12 moves between the first predetermined position P1 and the second predetermined position P2. The number of pulses generated by the encoder 52, whereby the control module 26 can determine the position of the lower end 12a of the curtain body 12 according to the number of pulses generated by the encoder before the motor 20 stops, so that the encoder 52 can be used as a position detector. For testing modules.

According to various embodiments, the encoder 52 may also be provided on the shaft 142 . In addition, the position detection module can also be provided with the rotating shaft 202 of the motor 20 or a resolver on the shaft 142 .

Please refer to FIG. 4 , the memory unit 2624 of the microcontroller 262 stores an instruction set that can be read and executed by the computer, and the processing unit 2622 of the microcontroller 262 receives various detection data (including at least the detection module 30 , the position detection module) and execute the instruction set to perform the control method of this embodiment. The control method includes the following steps shown in FIG. 14 .

Step S11 : when the lower end 12 a of the curtain body 12 stops moving, detect the position of the lower end 12 a of the curtain body 12 to obtain the position information of the lower end 12 a of the curtain body 12 .

When the lower end 12a of the curtain body 12 stops moving, the pulse number generated by the encoder 52 is sent to the processing unit 2622 for the processing unit 2622 to judge, and the current pulse number is stored in the memory unit 2624.

Step S12: Determine a correspondence between the position information and a comparison position Pa.

The processing unit 2622 determines whether the current pulse number at the lower end 12a of the curtain body 12 is higher than or equal to the pulse number at the comparison position Pa according to the received pulse number, and if so, it means that the corresponding relationship is the lower end of the curtain body 12 If the position of 12a is higher than or equal to the comparison position Pa, a first flag is recorded in the memory unit 2624. If not, it means that the corresponding relationship is that the position of the lower end 12a of the curtain body 12 is lower than the comparison position Pa, in the memory unit 2624 A second flag is recorded. In this embodiment, the comparison position Pa is equal to the second predetermined position P2, but it is not limited to this. The comparison position Pa can also be any position between the first predetermined position P1 and the second predetermined position P2. In one embodiment, the comparison position Pa is a position more than halfway between the first predetermined position P1 and the second predetermined position P2.

Step S13: According to the position of the lower end 12a of the curtain body 12, the processing unit 2622 determines to execute one of Steps S131 and S132: Step S131: Stop moving at the lower end 12a of the curtain body 12, and the memory unit 2624 records it as the first flag At the mark time, the microcontroller 262 determines whether the curtain body 12 is triggered by the first external force due to the movement of the first external force.

In this embodiment, when the motor 20 stops rotating and the lower end 12a of the curtain body 12 stops moving, the detection component 36 of the detection module 30 detects the state of the pull cord 44 to obtain a first Based on the detection result, and according to the first detection result, the microcontroller 262 determines whether the first trigger is generated to the curtain body 12 when the change of the tension state of the pulling rope 44 is detected. The first triggering includes at least that the lower end 12a of the curtain body 12 is lifted by an external force (ie, the first external force) and then lowered. Please refer to FIG. 15 to describe the first trigger detection step of detecting that the lower end 12a of the curtain body 12 is lifted up and then lowered. When the motor 20 stops rotating and the lower end 12a of the curtain body 12 stops moving, the pulling rope 44 is tensioned. The switch 40 of the detection component 36 is in the first state. When the user lifts the lower end 12a of the curtain body 12 upwards, the pull cord 44 relaxes so that the switch 40 turns to the second state, and the processing unit 2622 starts timing when it receives the state transition signal of the switch 40, and determines whether the switch 40 is in the second state. After a first predetermined time T1, the second state is maintained, and after the first predetermined time T1 arrives, the processing unit 2622 further determines whether the switch 40 has been turned on within a second predetermined time T2 following the first predetermined time T1. In the first state (that is, the lower end of the curtain body 12 is put down, and the pull cord 44 is tensioned), when the state transitions of the switch 40 meet the time setting requirements of the first predetermined time T1 and the second predetermined time T2, the processing unit 2622 will It is determined that the lower end 12a of the curtain body 12 is triggered by the first trigger. If the state transition of the switch 40 does not meet the time setting requirements of the first predetermined time T1 and the second predetermined time T2, the processing unit 2622 determines that the lower end 12a of the curtain body 12 has not been triggered by the first trigger, and continues to detect the state of the pulling rope 44 Measurement.

In various embodiments, the first predetermined time T1 may be set to be 0.1 to 0.5 seconds, and the second predetermined time T2 may be set to be 3 to 15 seconds. The first predetermined time T1 and the second predetermined time T2 are changed with the current position (position information) of the lower end 12a of the curtain body 12, so as to be in a position where the tension state of the pull cord 44 does not change significantly, such as near the first predetermined position P1 or In the area of the second predetermined position P2, the first predetermined time T1 is set to be inclined to the lower limit value, that is, when the lower end 12a of the curtain body 12 is moved by an external force for a short period of time, it is determined to be triggered, so as to increase the triggering effect. In the position where the tension state of the pull cord 44 changes significantly, for example, in the area where the user's hand can touch the lower end 12a of the curtain body 12, the first predetermined time T1 is set to the median value or tends to the upper limit value, that is The lower end 12a of the curtain body 12 must be moved by an external force for a long time before it is determined to be triggered, so as to prevent false triggering. In another embodiment, as shown in FIG. 16 , when the lower end 12a of the curtain body 12 is close to the second predetermined position P2, the pull cord 44 is released due to the When the length is short, when the lower end 12a of the curtain body 12 is lifted up, the tension cord 44 is not easy to form a tension relaxation state due to the short length. Therefore, the lower end 12a of the curtain body 12 is located at a second distance L2 below the second predetermined position P2 Within the time period, the first predetermined time T1 is set to 0.1 seconds, the second predetermined time T2 is set to 10 seconds to increase the sensitivity of the first trigger, and the second distance L2 can be set to 2 cm. In another embodiment, as shown in FIG. 17 , when the lower end 12a of the curtain body 12 is close to the first predetermined position P1, due to the longer length of the release cord, when the lower end 12a of the curtain body 12 is lifted up, Due to the long length of the pull cord 44, it is difficult to form a tension relaxation state. Therefore, when the lower end 12a of the curtain body 12 is located within a third distance L3 above the first predetermined position P1, the first predetermined time T1 is set to 0.15 seconds, and the second predetermined time T1 is set to 0.15 seconds. The predetermined time T2 is set to 10 seconds to increase the sensitivity of the first trigger, and the third distance L3 can be set to 2 cm. In another embodiment, when the lower end 12a of the curtain body is located in the area between the second distance L2 below the second predetermined position P2 and the third distance L3 above the first predetermined position P1, the first predetermined time T1 is set to 3 seconds, and the second predetermined time T2 is set to 10 seconds to prevent false triggering. In another embodiment, the second distance L2 and the third distance L3 may increase or decrease with the distance between the first predetermined position P1 and the second predetermined position P2. In another embodiment, the second distance L2 and the third distance L3 are distances of different lengths.

In the present embodiment, after the switch 40 is turned into the second state and the second predetermined time T2 has not been turned into the first state, it means that the lower end 12a of the curtain body 12 is blocked by the interference object and continues to be lifted up, resulting in The pulling rope 22 maintains a slack state. In this state, even if the switch 40 turns to the first state after the second predetermined time T2, the processing unit 2622 determines that the lower end 12a of the curtain body 12 is not triggered by the first trigger.

In this embodiment, when the processing unit 2622 determines that the lower end 12a of the curtain body 12 is triggered by the first trigger according to the first detection result, since the memory unit 2624 stores the first flag, the microcontroller 262 sends a signal to command the motor 20 Start, so that the rotating member 14 driven by the motor 20 rotates along the second rotating direction D2, so as to drive the lower end 12a of the curtain body 12 to the first predetermined position The curtain body 12 is expanded by moving in the direction of P1. When the lower end 12a of the curtain body 12 reaches the first predetermined position P1 (that is, the curtain body 12 is fully deployed), the pull cord 44 relaxes so that the switch 40 turns from the first state to the second state, and the microcontroller 262 receives the state of the switch 40 The signal is converted to control the motor 20 to stop rotating. In another embodiment, when the lower end 12a of the curtain body 12 reaches the first predetermined position P1 (that is, the curtain body 12 is fully deployed), the pull cord 44 is slackened so that the switch 40 is turned from the first state to the second state, and the microcontroller 262 After receiving the state transition signal of the switch 40, the processing unit 2622 determines that the lower end 12a of the curtain body 12 has reached the first predetermined position P1, and the microcontroller 262 controls the motor 20 to stop rotating. Then, the microcontroller 262 controls the motor 20 to rotate along the first rotation direction D1, so that the pull rope 44 is rolled back by a length until the pull rope 44 is tensioned so that the switch 40 is turned from the second state to the first state. At this time, the curtain body The lower end 12a of the 12 can be maintained at the first predetermined position P1 or moved to a first distance above the first predetermined position P1, and then the microcontroller 262 controls the motor 20 to stop rotating. In another embodiment, the processing unit 2622 can also determine whether the lower end 12a of the curtain body 12 has reached the first predetermined position P1 according to the position information detected and obtained by the encoder 52 , so that the lower end 12a of the curtain body 12 When reaching the first predetermined position P1, the motor 20 may be selectively not controlled to rotate along the first rotation direction D1.

Step S132: When the lower end 12a of the curtain body 12 stops moving and the memory unit 2624 records the second flag as the second flag, detect and determine whether the curtain body 12 is triggered by the first trigger.

In this embodiment, the structure of detecting and judging whether the curtain body 12 is triggered by the first trigger in step S132 is the same as that in step S131 , and details are not repeated here. When the processing unit 2622 determines that the lower end of the curtain body 12 is triggered by the first trigger according to the first detection result, since the memory unit 2624 stores the second flag, the microcontroller 262 sends a signal to instruct the motor 20 to start, so that the motor The rotating member 14 driven by 20 rotates along the first rotation direction D1 to drive the lower end 12a of the curtain body 12 to move toward the direction of the second predetermined position P2 so that the curtain body 12 is gradually closed. When the lower end 12a of the curtain body 12 reaches the second predetermined position P2 (that is, the curtain body 12 is completely closed), the processing unit 2622 rotates according to the rotation speed. The detection signal of the detection element 32 determines that the rotation speed of the rotating member 14 is lower than the lower limit rotation speed and maintains for a predetermined time, the processing unit 2622 determines that the lower end 12a of the curtain body 12 has reached the second predetermined position P2, and the microcontroller 262 is the The motor 20 is controlled to stop rotating. In another embodiment, the processing unit 2622 can also determine whether the lower end 12a of the curtain body 12 has reached the second predetermined position P2 according to the position information detected and obtained by the encoder 52 .

Steps S131 and S132 are executed. After the lower end 12a of the curtain body 12 stops moving, the process returns to step S11 to detect and determine the position of the lower end 12a of the curtain body 12, and wait for the next first trigger.

The above-mentioned main steps of the control method of this embodiment are described above. With the above steps, when the user stops moving at the lower end 12a of the curtain body 12, he applies the first trigger to the curtain body 12, so that the curtain body can be expanded or retracted. combine.

14 , the control method of this embodiment may further include: in step S131 , during the unfolding process of the curtain body 12 , the detection component 36 detects and obtains a second detection result representing a second external force After moving, when the microcontroller 262 determines that the lower end 12a of the curtain body 12 has received a second trigger, it stops the movement of the lower end 12a of the curtain body 12 for positioning, and returns to step S11. Please refer to FIG. 18 , when the rotating member 14 moves along the second rotation direction D2, the second detection result indicates that the lower end 12a of the curtain body 12 is lifted up by the user’s external force (second external force) and then lowered, that is, the curtain body is judged. 12 received a second trigger. In this embodiment, the detection step of the second trigger is the same as that of the first trigger, and both are determined by the state transition of the switch 40 in conjunction with the first predetermined time T1 and the second predetermined time T2, that is, when the switch 40 is switched from the first state After being in the second state, the second state is maintained for more than the first predetermined time T1 (the lower end 12a of the curtain body 12 is lifted up by the external force of the user for more than a first predetermined time T1), and in the second time following the first predetermined time T1 Within the predetermined time T2, the state of the switch 40 is converted from the second state to the first state (the lower end of the curtain body 12 12a is put down by the user), the processing unit 2622 determines that the lower end 12a of the curtain body 12 is subject to the second trigger.

In addition, if the switch 40 does not turn to the first state after the second predetermined time T2, it means that the lower end 12a of the curtain body 12 encounters the interference object and continues to be lifted up. At this time, the microcontroller 262 controls the motor 20 to stop rotating, and Stop driving the rotating member 14 to rotate, and go back to step S11 when the switch 40 is turned to the first state.

In practice, in addition to the control method shown in FIG. 18 , as shown in FIGS. 19 and 20 , the microcontroller 262 controls the rotating member 14 to stop rotating in the second rotating direction D2 , and then controls the rotating member 14 to rotate along the first rotating direction D2 . The rotation direction D1 rotates by a predetermined angle and then stops rotating, so that the drawstring 44 is rolled back by a length to drive the lower end 12a of the curtain body 12 to move up a first distance L1, so as to prevent the drawstring 44 from loosening, thereby making the drawstring 44 stable. It is wound on the reel 144, and the pulling rope 44 can be returned to the tension state. The predetermined angle can be corresponding to the predetermined angle by a predetermined number of pulses generated by the encoder 52. The microcontroller 262 can control the motor 20 according to the position information detected and obtained by the encoder 52, so as to drive the rotating member 14 to rotate, and at The position information detected and obtained by the encoder 52 represents that the lower end 12a of the curtain body 12 has moved upward by the first distance (ie the number of pulses generated by the encoder 52 reaches the predetermined number of pulses), the motor 20 is controlled to stop rotating .

Continuing to refer to FIG. 14 , in step S132 , in the process of closing the curtain body 12 , a third detection result detected and obtained by the detection component 36 represents that the movement of the curtain body 12 is countered by a downward third external force When the microcontroller 262 determines that the curtain body 12 is triggered by a third trigger, it stops the movement of the lower end 12a of the curtain body 12, and returns to step S11. The third trigger is the downward external force (third external force) that is resisted when the lower end 12a of the curtain body 12 moves upward. Please refer to FIG. 21 to describe the detection steps for detecting the third trigger in this embodiment, and the detection steps It is the same as the structure of detecting resistance encountered when the curtain body 12 is folded in the first embodiment. The rotation speed of the rotating member 14 matches a predetermined time to determine whether the curtain body 12 is subjected to a downward external force. The downward external force can be applied by the user, for example. External force pulls the curtain body 12 the lower end 12a. When the rotating member 14 rotates along the first rotating direction D1, the microcontroller 262 receives the rotating speed signal from the rotating speed detecting element 32, and when the rotating speed of the rotating member 14 is reduced to lower than the lower limit rotating speed for a predetermined time, the processing unit 2622 determines When the curtain body 12 is triggered by the third trigger, the processing unit 2622 controls the motor 20 to stop rotating, so that the rotating member 14 driven by the motor 20 also stops rotating.

Continuing to refer to FIG. 14 , in step S132 , in the process of closing the curtain body 12 , the detection component 36 detects and obtains a fourth detection result, which means that the curtain body 12 is moved by the fourth external force, and the microcontroller 262 determines that the curtain body 12 is moved by the fourth external force. When the lower end 12a of the curtain body 12 is subjected to a fourth trigger, the movement of the curtain body 12 is temporarily stopped, and after the fourth trigger is detected, a fifth detection result is obtained, which means that the curtain body 12 is moved by the fifth external force. When the microcontroller 262 determines that the lower end 12a of the curtain body 12 is triggered by a fifth trigger, it controls the curtain body 12 to expand gradually, so that the lower end 12a of the curtain body 12 moves in the direction of the first predetermined position P1, at the lower end 12a of the curtain body 12 When moving to the first predetermined position P1, the movement of the curtain body 12 is stopped, and the process returns to step S11. In this embodiment, the fourth trigger is when the lower end 12a of the curtain body 12 is lifted up by the user's external force (the fourth external force), and the fifth trigger is when the lower end 12a of the curtain body 12 is lifted by the user's external force (the fourth external force). The fifth external force) put down. Please refer to FIG. 22 to describe the detection steps of detecting the fourth trigger and the fifth trigger in this embodiment. The processing unit 2622 determines that when the rotating member 14 rotates along the first rotation direction D1, the pull rope 44 is in a tensioned state at this time. Therefore, the switch is in the first state. When the user lifts the lower end 12a of the curtain body 12 upward, at this time, the pull cord 44 is loosened so that the switch 40 turns to the second state and keeps the second state for more than a third predetermined time T3, the processing unit 2622 judges the curtain body When the lower end 12a of the curtain 12 is triggered by the fourth, the microcontroller 262 controls the motor 20 to stop rotating, so as to suspend the movement of the lower end 12a of the curtain body 12 . Next, when the user puts down the lower end 12a of the curtain body 12, the pull cord 44 returns to the tensioned state and drives the switch 40 to the first state. At this time, the processing unit 2622 determines that the lower end 12a of the curtain body 12 is triggered by the fifth The controller 262 controls the motor 20 to drive the rotating member 14 to rotate along the second rotation direction D2, so that the lower end 12a of the curtain body 12 moves in the direction of the first predetermined position P1, so that the curtain body 12 gradually expands open. In this embodiment, the third predetermined time T3 is 0.05 seconds. When the lower end 12a of the curtain body 12 moves down to the first predetermined position P1, the microcontroller 262 controls the motor 20 to stop rotating. In another embodiment, after the motor 20 stops rotating, the microcontroller 262 can also control the motor 20 to start, so as to drive the rotating member 14 to rotate along the first rotating direction D1, so as to drive the lower end 12a of the curtain body 12 to move upward, and The rotation of the motor 20 is stopped after the lower end 12a of the curtain body 12 moves upward for a first distance.

Then, during the unfolding process of the curtain body 12, the detection component 36 detects and obtains a sixth detection result, which means that the curtain body 12 is moved by the sixth external force and the microcontroller 262 determines that the curtain body 12 is subjected to a sixth trigger. , stop the movement of the curtain body 12, and return to step S11. In this embodiment, the sixth trigger is the same as the second trigger, that is, the lower end of the curtain body 12 is lifted up by the user's external force (the sixth external force) and then lowered, and the control stops the movement of the lower end 12a of the curtain body 12 The description is as described in FIG. 18 and the above, and will not be repeated here. In addition, if the switch 40 does not turn to the first state after the second predetermined time T2, it means that the lower end 12a of the curtain body 12 encounters an interference object and continues to be lifted up. At this time, the microcontroller 262 controls the motor 20 to stop rotating. And stop driving the rotating member 14 to rotate, and when the switch 40 is turned to the first state, return to step S11 , which is described in FIG. 19 and the above, and will not be repeated.

In addition, in this embodiment, when the lower end 12a of the curtain body 12 encounters the resistance of the interference object and stops when unfolding or folding, the process returns to step S11.

With the control method of the electric curtain of this embodiment, the user can manipulate the curtain body 12 to make the curtain body 12 expand, fold, or stop, or judge the curtain body to stop when encountering an interference object.

23 is a partial schematic diagram of the motorized curtain according to the fourth embodiment of the present invention, which has substantially the same structure as that of the third embodiment. The difference is that the detection module 30 of the motorized curtain of this embodiment further includes a current detection module. The detector 54, the current detector 54 is disposed on the power supply path between the motor 20 and the driving circuit 28 and is electrically connected to the control module 26, and the current detector 54 detects The current of the motor 20. The control method of the electric curtain of this embodiment is basically the same as that of the third embodiment, the difference is that in step S132, during the process of the curtain body 12 being folded, the detection step of detecting the third trigger of the curtain body 12 is as follows: The current of the motor 20 is matched with a predetermined time to determine whether the curtain body 12 is subjected to a counteracting downward external force. Please refer to FIG. 24 , when the rotating member 14 rotates along the first rotation direction D1 to drive the curtain body 12 to close, the current of the motor 20 detected by the current detector 54 is lower than an upper limit current. When pulled by the external force, the rewinding of the pull rope 44 is blocked by the external force, and the rotation of the rotating member 14 and the operation of the motor 20 are blocked, resulting in the current of the motor 20 rising gradually. When the upper limit current is exceeded and a fourth predetermined time T4 is exceeded, it is determined that the curtain body 12 is triggered by the third trigger, and the microcontroller 262 controls the motor 20 to stop rotating, so that the rotating member 14 driven by the motor 20 stops rotating, and the lower end 12a of the curtain body 12 stops rotating. Stop moving up and go back to step S11. In this embodiment, the fourth predetermined time T4 may be 0.2 to 1 second.

In this embodiment, the current of the motor 20 and the predetermined time are used as the detection step for judging whether the curtain body 12 is subjected to downward pulling force, and it can also be applied to the first embodiment as the detection for judging the resistance when the curtain body 12 is retracted. step.

FIG. 25 and FIG. 26 are partial schematic diagrams of the motorized window shade according to the fifth embodiment of the present invention, which have substantially the same structure as the third embodiment. The difference is that the control device 24 of the motorized window shade of this embodiment includes a wireless signal receiver. The circuit 56, the wireless signal receiving circuit 56 is electrically connected to the microcontroller 262 of the control module 26 (please refer to FIG. 4). The detection module 30 further includes a gravity sensor 58 and a wireless signal transmission circuit 60 that are electrically connected to each other. The gravity sensor 58 and the wireless signal transmission circuit 60 are disposed in the lower beam 122 of the lower end 12 a of the curtain body 12 . The gravity sensor 58 detects the gravity of the lower end 12a of the curtain body 12, and sends the gravity data wirelessly through the wireless signal sending circuit 60. After receiving the gravity data, the wireless signal receiving circuit 56 transmits the gravity data to the control module 26 of the microcontroller 262 for the microcontroller 262 to process a single The element 2622 determines whether the lower end of the curtain body 12 is moved by an external force according to the gravity data, such as being lifted or lowered.

The control method of the electric curtain of this embodiment is substantially the same as that of the third embodiment, and the difference is the detection steps of the first, second, fourth, fifth and sixth triggers.

Please refer to FIG. 27 to describe the detection step of the first trigger condition. When the lower end 12a of the curtain body 12 is lifted by an external force, the gravity value detected by the gravity sensor 58 will decrease. When the processing unit 2622 determines the gravity When the value drops to less than or equal to a predetermined gravity value, the processing unit 2622 starts timing, and determines whether the continuous transmission of the gravity value to the processing unit 2622 is less than or equal to the predetermined gravity value (that is, the lower end of the curtain is lifted) whether it exceeds the time The first predetermined time T1, if yes, then it is determined whether the gravity value transmitted by the gravity sensor 58 has been changed to be higher than the predetermined gravity value (that is, the curtain body 12) within a second predetermined time T2 following the first predetermined time T1. The lower end is lowered), if so, it is determined that the curtain body 12 is triggered by the first. The detection steps of the second trigger and the sixth trigger are the same as the first trigger, and are not repeated here.

Please refer to FIG. 28 to describe the fourth and fifth trigger detection steps. During the process of closing the curtain body 12 , when the processing unit 2622 determines that the gravity value detected by the gravity sensor 58 is maintained at less than or equal to a predetermined value When the gravity value exceeds the third predetermined time T3 (that is, the lower end of the curtain body 12 is lifted), it is determined that the lower end 12a of the curtain body 12 is triggered by the fourth trigger. At this time, the microcontroller 262 controls the motor 20 to temporarily stop rotating, The lower end 12a of the curtain body 12 driven by the motor 20 is temporarily stopped from moving, and the curtain body 12 is stopped from being folded. After the third predetermined time T3 is exceeded, when the processing unit 2622 determines that the received gravity value is higher than the predetermined gravity value (that is, the lower end of the curtain body 12 is put down), it is determined that the lower end 12a of the curtain body is triggered by the fifth The controller 262 controls the motor 20 to rotate and drives the lower end of the curtain body 12 to move downward to expand the curtain body.

The control method of this embodiment can also be applied to the fourth embodiment.

FIG. 29 is a partial schematic diagram of the electric curtain according to the sixth embodiment of the present invention, which has substantially the same structure as that of the fifth embodiment. The difference is that the detection module 30 of the present embodiment further includes a pressure module that is electrically connected to each other. The electrical element 62 and the wireless signal sending circuit 60 are arranged. The piezoelectric element 62 is arranged on the bottom of the lower beam 122 , and the wireless signal sending circuit 60 is arranged in the lower beam 122 . When the user lifts the lower beam 122 , the piezoelectric element 62 will be pressed upward, causing the output voltage value of the piezoelectric element 62 to change, and the data of the output voltage value will be transmitted wirelessly through the wireless signal sending circuit 60 . After receiving the data of the output voltage value, the wireless signal receiving circuit 56 transmits the data of the output voltage value to the microcontroller 262 of the control module 26 for the processing unit 2622 of the microcontroller 262 to determine the curtain body 12 according to the output voltage value Whether the lower end 12a of the device is moved by external force, such as being lifted or lowered. The output voltage value of the piezoelectric element 62 in this embodiment is proportional to the pressure under pressure.

The control method of the electric curtain of this embodiment is basically the same as that of the third embodiment, and the difference is the detection steps of the first, second, fourth, fifth and sixth trigger conditions

Please refer to FIG. 30 to describe the detection step of the first trigger condition. When the lower end 12a of the curtain body 12 is lifted, the output voltage value generated by the piezoelectric element 62 will increase. When the output voltage value rises to be greater than or equal to a predetermined voltage value, the processing unit 2622 starts timing, and determines whether the time that the output voltage value remains greater than or equal to the predetermined voltage value (that is, the lower end of the curtain body is lifted) exceeds the first predetermined value. time T1, if yes, then judge whether the output voltage value generated by the piezoelectric element 62 has changed to be lower than the predetermined voltage value during the second predetermined time T2 following the first predetermined time T1 (that is, the lower end of the curtain body 12 is lowered ), if yes, it is judged that the lower end 12a of the curtain body 12 is triggered by the first trigger. The detection steps of the second trigger condition and the sixth trigger condition are the same as those of the first trigger condition, and are not repeated here.

Please refer to FIG. 31 to describe the fourth and fifth trigger detection steps. During the process of closing the curtain body 12 , when the processing unit 2622 determines that the output voltage value generated by the piezoelectric element 62 is higher than When the voltage rises to greater than or equal to the predetermined voltage value and exceeds the third predetermined time T3 (that is, the lower end of the curtain body is lifted), it is determined that the curtain body 12 is subject to the fourth trigger. At this time, the microcontroller 262 controls the motor 20 to temporarily stop Rotate, so that the lower end 12a of the curtain body 12 driven by the motor temporarily stops moving, and the curtain body 12 stops closing. After that, after the third predetermined time T3 has passed, the processing unit 2622 judges that the received output voltage value is less than the predetermined voltage value (that is, the lower end of the curtain body 12 is put down), then judges that the curtain body 12 is subject to the fifth trigger, and the micro-controller The device 262 controls the motor 20 to rotate and drives the lower end 12a of the curtain body to move downward, so that the curtain body is unfolded.

The control method of this embodiment can also be applied to the fourth embodiment.

In practice, the output voltage value of the used piezoelectric element 62 can also be inversely proportional to the pressure under pressure, and the difference in the detection step is that when the output voltage value drops to less than or equal to the predetermined voltage value, the processing unit 2622 determines The lower end 12a of the body 12 is lifted. When the output voltage value is greater than the predetermined voltage value, the processing unit 2622 determines that the lower end 12a of the curtain body 12 is lowered.

In addition to the above-mentioned switch 40 , the gravity sensor 58 and the piezoelectric element 62 as the sensing means for the user to lift the lower end of the curtain body 12 or lower the lower end 12 a of the curtain body 12 , the lower end 12 a of the curtain body 12 can also be provided Other sensing means, such as electrostatic sensors, capacitive sensors, gyroscopes, vibration sensors, sound sensors, etc., when the user lifts the lower end of the curtain body 12 or puts it down by hand or external force When the lower end 12a of the curtain body 12 is located, the sensing means can generate different output values and send them to the wireless signal receiving circuit 56 through the wireless signal sending circuit 60 for the microcontroller 262 of the control module 26 according to the received values or signals Make judgment and control the motor to drive the lower end of the curtain body to perform predetermined corresponding actions.

According to the above, with the control method of the electric curtain of the present invention, the user can directly control the curtain body to expand, fold, or stop the curtain body without controlling the curtain body through the man-machine interface. more convenient.

When the lower end 12a of the curtain body 12 encounters an interference object in the motorized curtain of the present invention, the microcontroller 262 can adopt corresponding implementations according to different design considerations. In another embodiment, when the lower end 12a of the curtain body 12 moves in a first moving direction and encounters an interference object, the microcontroller 262 not only controls the driving device 16 to stop rotating, but also controls the motor 20 to rotate in the opposite direction. , so that the lower end 12a of the curtain body 12 moves in a second moving direction, and the second moving direction is different from the first moving direction. For example, when the driving device 16 originally rotates in the second rotation direction D2, and the microcontroller 262 controls the driving device 16 to rotate in the reverse direction, it controls the driving device 16 to stop and then rotates in the first rotation direction D1. In controlling the reverse rotation of the drive 16, the microcontroller 262 may set the drive 16 to stop for a human-perceivable period of time before starting reverse rotation. In another embodiment, the microcontroller 262 may also set the drive 16 to appear to rotate directly in reverse. At this time, even if it is difficult for humans to perceive, when the driving device 16 changes the direction of rotation, at least for a very short period of time, the rotational speed of the driving device 16 is close to 0, and the rotation of the driving device 16 is temporarily stopped. Therefore, the lower end 12a of the curtain body 12 will correspondingly stop from the original moving direction, and then move to another moving direction. In the following description, the first moving direction takes the lower end 12a of the curtain body 12 moving downward as an example, and the second moving direction takes the lower end 12a of the curtain body 12 moving upward as an example, but not limited thereto.

In some cases, when the lower end 12a of the curtain body 12 moves downward and encounters an interference object, the pull cord 44 may loosen and fail to maintain the tension state, causing the pull cord 44 to become tangled and unable to return to normal. operational status. In another embodiment, as shown in FIG. 32 , when the lower end 12a of the curtain body 12 moves downward and encounters the interference O, the microcontroller 262 can not only control the driving device 16 to stop rotating, but also further control the driving device 16 reversely rotates to drive the rotating member 14, and can rewind the appropriate length of the pull rope 44 to the spool 144, so that the pull rope 44 can be kept in a tensioned state, and it is not easy to cause entanglement and avoid failure. The rewinding length of the pulling rope 44 can be set to a preset length, and the length of the rewinding of the driving device 16 is reversed for a preset return time. degree, or dynamically judged by the microcontroller 262 whether the rewinding length is sufficient to restore the pull cord 44 to a tensioned state, etc., so as to move the lower end 12a of the curtain body 12 upward by the return distance DS. For example, during the reverse rotation of the driving device 16 , when the state of the switch 40 changes to indicate that the pull rope 44 has been in a tensioned state, the microcontroller 262 will correspondingly control the driving device 16 to stop the reverse rotation according to the state of the switch 40 . turn to.

In another embodiment, the microcontroller 262 may calculate the position of the lower end 12a of the curtain body 12 according to the output signals of the rotational speed detecting element 32, the encoder 52 and/or the resolver. The output signals of the encoder 52 and the resolver (not shown) can be used to calculate the rotation direction, rotation speed, rotation time and/or rotation distance of the rotating member 14 and/or the driving device 16 . In addition, the rotational speed detecting element 32 can also be used to detect the rotational direction and rotational speed of the rotating member 14 and/or the driving device 16. For example, the rotational speed detecting element 32 is arranged on the shaft 142, the spool 144 and/or the motor. The sensor of the rotating shaft 202 of the 20 detects the rotating direction and rotation speed of the rotating member 14 and/or the driving device 16 . According to the output signals of the rotational speed detection element 32 , the encoder 52 , the resolver and/or the memory unit 2624 and other components, the microcontroller 262 can use the rotational direction, rotational speed and rotational time of the rotating member 14 and/or the driving device 16 to To calculate the length of the pull rope 44 released by the upper beam 10 . For example, the microcontroller 262 can calculate the length of the curtain body 12 based on the second predetermined position P2 and/or the first predetermined position P1 of the curtain body 12 and the length released by the pull cord 44 from the upper beam 10 . The position of the lower end 12a.

When the lower end 12a of the curtain body 12 encounters the interference object O, the position of the lower end 12a of the curtain body 12 may cause different problems, and different implementations are required to deal with it. When the lower end 12a of the curtain body 12 encounters the interference O, when the microcontroller 262 controls the driving device 16 to rotate in the reverse direction, it can be set to move the lower end 12a of the curtain body 12 reversely by different distances according to different situations. In another embodiment, the first predetermined position P1 of the lower end 12a of the curtain body 12 is set to be in contact with or close to a reference plane position, and the reference plane position may be a window sill, a floor, a ground surface or other suitable plane, and the reference plane location need not be horizontal or flat. In this implementation, when the electric curtain is not properly installed, the drawstring 44 or the spool 144 is aged, and/or there are sundries (such as books, shoes or toys) near the first predetermined position P1, etc., the lower end of the curtain body 12 will When the interference object O is encountered near the reference plane position 12a, the lower end 12a of the curtain body 12 cannot move to the first predetermined position P1. The possibility of entanglement caused by loosening is low. The microcontroller 262 can correspondingly control the driving device 16 to rotate in the opposite direction, so that the pull cord 44 is rewound to a smaller length, and the lower end 12a of the curtain body 12 is moved upward for a smaller length. The return distance DS can avoid the tangling of the pull cord 44 . On the other hand, when the lower end 12a of the curtain body 12 encounters the interference object O at a position farther away from the reference plane, since the length of the pull cord 44 that can be loosened is greater, the loosening of the pull cord 44 may cause entanglement The micro-controller 262 can correspondingly control the driving device 16 to rotate in the opposite direction, so that the pull cord 44 can be rewound by a larger length, and the lower end 12a of the curtain body 12 can be moved upward by a larger return distance DS to avoid pulling The rope 44 is tangled. In the above embodiments, the reference plane position corresponds to the physical position in real life as an example for description. The upper limit (the second predetermined position P2), the position of the upper beam 10, and/or the output of the rotational speed detection element 32 are calculated, and the microcontroller 262 sets the stop or reverse of the driving device 16 according to the position of the reference plane. turning behavior. For example, the lower end 12a of the curtain body 12 can be moved downward from the upper beam 10, and the position after the driving device 16 operates for a predetermined time (eg, 15 seconds) can be used as the reference plane position. In another embodiment, multiple reference plane positions may also be provided.

In addition, because the material of the curtain body 12 has elasticity or other factors, when the microcontroller 262 controls the movement of the lower end 12a of the curtain body 12, it is not necessarily easy to accurately detect the moving distance. Therefore, in another embodiment, the microcontroller 262 corresponds to the different return distances DS moved by the lower end 12a of the curtain body 12 by the length of the retraction of the pull cord 44 .

In another embodiment, as shown in FIG. 33 , when the lower end 12a of the curtain body 12 moves downward and encounters an interference object O within a proximity distance DN from the position of the reference plane R, the microcontroller 262 controls the corresponding control The drive device 16 is reversely rotated to rewind the drawstring 44 by the first length to move the lower end 12a of the curtain body 12 upward by the first return distance DS1 to avoid the drawstring 44 from tangling. In addition, as shown in FIG. 34, when the lower end 12a of the curtain body 12 moves downward and encounters the interference object O outside the proximity distance DN from the position of the reference plane R, the microcontroller 262 correspondingly controls the driving device 16 to rotate in the opposite direction , rewinding the pull cord 44 by a second length to move the lower end 12a of the curtain body 12 upward a second return distance DS2 to avoid the pull cord 44 from tangling. In this embodiment, the first length is set to be smaller than the second length, so that the first return distance DS1 is smaller than the second return distance DS2. In addition, according to different design considerations, the first length may be set to be greater than or equal to the second length, so that the first return distance DS1 is greater than or equal to the second return distance DS2. In another embodiment, the first length is set to be greater than the second length, when the lower end 12a of the curtain body 12 encounters the interference object O beyond the proximity distance DN from the position of the reference plane R (the reference plane in this embodiment) The position R and/or the proximity distance DN can also be set to be different from the previous embodiment), the lower end 12a of the curtain body 12 will be closer to the upper beam 10, and the microcontroller 262 will correspondingly rewind the pull cord 44 to the second length, The lower end 12a of the curtain body 12 is moved in the opposite direction by the second return distance DS2. The smaller second return distance DS2 in the reverse movement can prevent the lower end 12a of the curtain body 12 from moving too much in the reverse direction to touch the upper beam 10, and can avoid triggering other reaction mechanisms, so as to reduce energy consumption or avoid damage to the motorized curtain assembly . In other embodiments, when the lower end 12a of the curtain body 12 moves downward and encounters interference O at different positions, the microcontroller 262 may also only control the lower end 12a of the curtain body 12 to move upward by the same return distance DS; Alternatively, the microcontroller 262 can also control the lower end 12a of the curtain body 12 to have a plurality of return distances DS to move upward correspondingly according to the proximity distance DN between the lower end 12a of the curtain body 12 and the position of the reference plane R. For example, when the lower end 12a of the curtain body 12 encounters the interference object O at a position closer to the reference plane R or closer to the upper beam 10, the microcontroller 262 controls correspondingly The lower end 12a of the curtain body 12 moves in the opposite direction by a smaller return distance DS; and when the lower end 12a of the curtain body 12 encounters the interference O at other positions, the microcontroller 262 will correspondingly set the lower end 12a of the curtain body 12 to move in the opposite direction One or more larger return distances DS.

In addition, when the lower end 12a of the curtain body 12 encounters the interference object O near the position from the reference plane R, the microcontroller 262 controls the driving device 16 to reversely rotate, and when the lower end 12a of the curtain body 12 is moved upward, it may be A gap is formed between the lower end 12a of the curtain body 12 and the position of the reference plane R, and the light penetrating through the gap often results in poor shading effect of the electric curtain. In another embodiment, when the lower end 12a of the curtain body 12 encounters the interference object O near the position from the reference plane R, the microcontroller 262 controls the driving device 16 to reversely rotate and move the lower end 12a of the curtain body 12 upwards After a small return distance DS, it is checked whether the state of the switch 40 has been switched to the first state representing tensioning of the pull cord 44 . The microcontroller 262 can check whether the pull cord 44 is under tension by performing the action combination of moving the lower end 12a of the curtain body 12 upward for a small return distance DS one or more times. The reverse rotation of the driving device 16 is stopped after the state of the switch 40 is converted to the first state representing the tension of the pulling rope 44 , or after a certain number of combinations of the above actions are performed. Therefore, the gap generated between the lower end 12a of the curtain body 12 and the position of the reference plane R can be eliminated or reduced, so as to reduce the trouble caused by the penetrating light to the user.

In addition, when the lower end 12a of the curtain body 12 moves at a high speed and encounters the interference object O, since the rotating member 14 rotates faster, the length of the pull cord 44 may be loosened, so that the pull cord 44 is loosened. The possibility of entanglement is higher. In another embodiment, when the lower end 12a of the curtain body 12 moves downward and encounters the interference object O, the microcontroller 262 can set the driving device 16 to rotate in the opposite direction, and according to the rotation speed of the rotating member 14 and/or the driving device 16 (For example, according to the preset rotation speed value, according to the rotation speed value set by the user, and/or according to the output signal of the rotation speed detection element 32, the encoder 52 and/or the resolver, etc.), the curtain is correspondingly calculated. under body 12 The end 12a is moved upwards a number of different return distances DS to avoid tangling of the pull cord 44 . When the rotational speed of the rotating member 14 and/or the driving device 16 is less than the first preset rotational speed threshold, so that the lower end 12a of the curtain body 12 moves downward at a first speed and encounters the interference O, the microcontroller 262 can control the The drive device 16 is reversely rotated to rewind the pull cord 44 a third length to move the lower end 12a of the curtain body 12 up a third return distance to prevent the pull cord 44 from tangling. When the rotational speed of the rotating member 14 and/or the driving device 16 is greater than the first preset rotational speed threshold, so that the lower end 12a of the curtain body 12 moves downward at a second speed and encounters the interference O, the microcontroller 262 can control the The drive device 16 is reversely rotated to rewind the drawstring 44 by a fourth length to move the lower end 12a of the curtain body 12 up a fourth return distance to avoid tangling of the drawstring 44, the first speed being less than the second speed. In this embodiment, the third length is set to be smaller than the fourth length, so that the third return distance is smaller than the fourth return distance. In other embodiments, according to different design considerations, the third length may be set to be greater than or equal to the fourth length, so that the third return distance is greater than or equal to the fourth return distance. In other embodiments, when the lower end 12a of the curtain body 12 moves downward and encounters the interference object O, the microcontroller 262 may only control the lower end 12a of the curtain body 12 to move upward by the same return distance DS; The lower end 12a of the curtain body 12 can also be correspondingly set to have two or more different upward return distances DS according to the rotational speed of the rotating member 14 and/or the driving device 16 . In addition, a plurality of different preset rotational speed thresholds and corresponding upward return distances DS may also be set.

In addition, the microcontroller 262 can also set the driving device 16 in combination with the above-mentioned ways, and use various operation modes to enable the lower end 12a of the curtain body 12 to move in a desired manner. For example, when the lower end 12a of the curtain body 12 encounters the interference object O, the microcontroller 262 can set the driving device 16 in the first operation mode to drive the lower end 12a of the curtain body 12 to move in the opposite direction according to different judgment conditions, or in the first operation mode. The second operation mode sets the driving device 16 to stop rotating, so that the lower end 12a of the curtain body 12 stops moving. In another embodiment, when the lower end 12a of the curtain body 12 moves downward and encounters the interference object O outside the proximity distance DN from the position of the reference plane R, the microcontroller 262 sets the driving device 16 in the first operation mode to drive the lower end 12a of the curtain body 12 to move upward by an appropriate return distance DS. When the lower end 12a of the curtain body 12 moves downward and encounters the interference object O within the adjacent distance DN from the position of the reference plane R, the microcontroller 262 will set the driving device 16 to only stop and not rotate in the reverse direction in the second operation mode , so that the lower end 12a of the curtain body 12 stops moving. In another embodiment, when the lower end 12a of the curtain body 12 moves downward and encounters the interference object O within the proximity distance DN from the position of the reference plane R, the microcontroller 262 will set the driving device 16 in the first operation mode , so as to drive the lower end 12a of the curtain body 12 to move upward by an appropriate return distance DS. When the lower end 12a of the curtain body 12 moves downward and encounters the interference object O outside the proximity distance DN from the position of the reference plane R, the microcontroller 262 will set the driving device 16 to only stop and not rotate in the reverse direction in the second operation mode , so that the lower end 12a of the curtain body 12 stops moving. In addition, the microcontroller 262 can also use the first operation mode to set the driving device 16, but the driving device 16 can be set to drive the lower end 12a of the curtain body 12 to move in reverse for different distances according to different conditions. In another embodiment, when the lower end 12a of the curtain body 12 moves downward and encounters the interference object O within the proximity distance DN from the position of the reference plane R, the microcontroller 262 can also control the driving device 16 to pull the pulling The cord 44 is rewound a fifth length, moving the lower end 12a of the curtain body 12 upward a shorter fifth return distance. When the lower end 12a of the curtain body 12 moves downward and encounters the interference object O outside the proximity distance DN from the position of the reference plane R, the microcontroller 262 will control the movement speed of the lower end 12a of the curtain body 12 according to the difference of the moving speed. The drawstring 44 is rewound to different lengths. For example, when the moving speed of the lower end 12a of the curtain body 12 is the first speed, the drawstring 44 is rewound to the sixth length, and the moving speed of the lower end 12a of the curtain body 12 is the second speed. , the pulling rope 44 is rolled back to the seventh length, the sixth length is different from the seventh length, and the sixth length can be set to be smaller than the seventh length, so as to move the lower end 12a of the curtain body 12 upward by different sixth return distances and seventh lengths The return distance, and both the sixth length and the seventh length are greater than the fifth length, and both the sixth return distance and the seventh return distance are greater than the fifth return distance. In another embodiment, the sixth length may be set to be greater than the seventh length. exist In another embodiment, when the lower end 12a of the curtain body 12 encounters the interference object O, and the rotational speed of the rotating member 14 and/or the driving device 16 is greater than the first preset rotational speed threshold, the microcontroller 262 will operate in the first operation mode. The driving device 16 is arranged to drive the lower end 12a of the curtain body 12 to move in the opposite direction; when the lower end 12a of the curtain body 12 encounters an interference O, and the rotational speed of the rotating member 14 and/or the driving device 16 is less than the first preset rotational speed threshold, the The controller 262 sets the driving device 16 to stop rotating in the second operation mode, so that the lower end 12a of the curtain body 12 stops moving.

In the above, the first to seventh lengths are only examples to illustrate the lengths that the lower end 12a of the curtain body 12 is rolled back after encountering the interference object O, and the first to seventh return distances are only examples to illustrate that the lower end 12a of the curtain body 12 encounters the interference object. The return distance DS of moving in the second moving direction after O, and the sequence of the aforementioned first to seventh serial numbers is not intended to limit the present invention.

When the lower end 12a of the curtain body 12 moves downward, the design of moving upward in the opposite direction when encountering the interference O can also be applied to setting the lower limit of the electric curtain. In another embodiment, as shown in FIG. 35 , the motorized curtain is installed at the top 201 of a building opening 200 , and the lower end 12 a of the curtain body 12 can move between the top 201 and the bottom end 202 of the building opening 200 to open Or shade building openings 200 . The microcontroller 262 controls the driving device 16 to rotate in a rotational direction such as the second rotational direction D2, and drives the lower end 12a of the curtain body 12 to move downward. When the lower end 12a of the curtain body 12 moves downward until it encounters a building When the bottom end 202 of the opening 200 is located, the bottom end 202 of the building opening 200 blocks the lower end 12a of the curtain body 12 from continuing to move downward, and the detection module 30 can detect that the lower end 12a of the curtain body 12 is affected by the bottom end of the building opening 200 The blocking of 202 , that is, the tension of the pull cord 44 will change from a tensioned state to a relaxed state, causing the state of the switch 40 to change. 36, the microcontroller 262 controls the driving device 16 to stop according to the state of the switch 40 and then performs an upward movement step. The upward movement step is that the microcontroller 262 controls the driving device 16 to reverse the first rotation direction D1. Rotate to make the driving device 16 rotate a distance, drive the pulling rope 44 to rewind a length, and then instruct the driving device 16 to stop. Whether the driving device 16 rotates the distance, if the detection module 30 detects that the tension of the pull cord 44 has returned to the tension state and the switch 40 is turned to the first state, the microcontroller 262 will determine the current curtain body The position of the lower end 12a of the 12 is set as the lower limit position; if the detection module 30 detects that the tension of the pulling rope 44 is still in a slack state at this time, the upward movement step is performed again, and the microcontroller 262 controls the driving device 16 to start, so that the The driving device 16 rotates a distance again, and drives the pull rope 44 to rewind a length again, so that the pull rope 44 is rolled back several times until it returns to a tensioned state. Set to the lower limit. In other words, at least one moving step is performed until the detection module 30 no longer detects that the lower end 12a of the curtain body 12 is blocked by the bottom end 202 , the number of pulses detected and obtained by the microcontroller 262 through the encoder 52 The position of the lower end 12a of the curtain body 12 after the drive device 16 is stopped is determined and set as the lower limit position. When the tension of the pulling rope 44 has returned to the tension state, the microcontroller 262 can also control the driving device 16 to perform an upward movement step again, so as to drive the lower end 12a of the curtain body 12 to move toward the direction of the top 201 of the building opening 200 A predetermined return distance DS is set, and the position of the lower end 12a of the moved curtain body 12 is set as the lower limit position. In another embodiment, when the lower end 12a of the curtain body 12 is blocked by the bottom end 202 of the building opening 200, the microcontroller 262 controls the driving device 16 to stop and then rotate in the opposite direction, so that the pulling rope 44 is rewound to return to tension In the tight state, the microcontroller 262 controls the driving device 16 to stop, and the microcontroller 262 sets the position of the lower end 12a of the curtain body 12 at this time as the lower limit position. This method of setting the lower limit by changing the state of the pull cord 44 enables the lower end 12a of the curtain body 12 to be the bottom end closest to the building opening 200 when the curtain body 12 is unfolded, which can avoid penetrating light.

In the drawings, the drive device 16 only uses a single block to illustrate the motor 20 and the reducer 22 for ease of description. In the above-mentioned embodiment, the driving device 16 may also include one or more motors 20 and one or more reducers 22, respectively. For example; when the microcontroller 262 controls the driving device 16 to drive the rotating member 14 in the first rotational direction D1, the motor 20 can be used with a first reducer (not shown) to drive the rotating member 14 in the first rotational direction D1; controller When the 262 controls the driving device 16 to drive the rotating member 14 in the second rotating direction D2, the motor 20 can be used with a second reducer (not shown) to drive the rotating member 14 in the second rotating direction D2. In another embodiment, when the microcontroller 262 controls the driving device 16 to drive the rotating member 14 in the first rotational direction D1, a first motor (not shown) and the reducer 22 can be used to drive the rotating member 14 to rotate in the first rotational direction D1 When the microcontroller 262 controls the driving device 16 to drive the rotating member 14 in the second rotation direction D2, a second motor (not shown) and the reducer 22 can be used to drive the rotating member 14 in the second rotation direction D2. In another embodiment, when the microcontroller 262 controls the driving device 16 to drive the rotating member 14 in the first rotational direction D1, the first motor and the first reducer may be used to drive the rotating member 14 in the first rotational direction D1; when When the microcontroller 262 controls the driving device 16 to drive the rotating member 14 in the second rotational direction D2, a second motor and a second reducer may be used to drive the rotating member 14 in the second rotational direction D2.

The above descriptions are only preferred feasible embodiments of the present invention, and any equivalent changes made by applying the description of the present invention and the scope of the patent application should be included in the patent scope of the present invention.

100: Curtains

10: Upper beam

10a: Accommodating space

12: Curtain body

12a: lower end

122: Lower beam

14: Turning parts

142: Shaft

144: Reel

16: Drive device

18: Shell

24: Control device

Pa: Compare position

P1: The first predetermined position

P2: Second predetermined position

Claims (23)

An electric curtain, comprising a curtain body, a driving device and a control device, wherein, the driving device is connected with the curtain body, and the driving device is connected with the control device, and the driving device is activated by the command of the control device to drive The lower end of the curtain body moves upward or downward in a moving direction, so that the curtain body is folded or unfolded, and the driving device is stopped by the command of the control device, so that the lower end of the curtain body stops moving; the control device at least Including: a position detection module, detecting the position of the lower end of the curtain body to obtain a position information; a control module, at least including a microcontroller, when the lower end of the curtain body stops moving, the microcontroller Comparing the position information representing the position of the lower end of the curtain body relative to a comparison position to obtain a corresponding relationship, wherein the corresponding relationship represents that in the moving direction of the lower end of the curtain body, the position of the lower end of the curtain body is relatively A comparison result at the comparison position; a detection module, when the lower end of the curtain body stops moving, detects the movement of the curtain body by a first external force used to start the curtain body to fold or unfold, to A first detection result is obtained; when the microcontroller determines that the curtain body is subject to a first trigger according to the first detection result, the microcontroller instructs the driving device to start according to the corresponding relationship and the first trigger, so as to The lower end of the curtain body is driven to move, and the curtain body is folded or unfolded. The electric curtain according to claim 1, wherein the corresponding relationship is that the lower end position of the curtain body is higher than or equal to the comparison position, and when the curtain body is triggered by the first trigger, the microcontroller instructs the driving device to start, In order to drive the lower end of the curtain body to move downward, the curtain body is unfolded. The electric curtain according to claim 2, wherein when the microcontroller determines that the lower end of the curtain body moves downward to a first predetermined position, the microcontroller commands the driving device to stop, so that the lower end of the curtain body stops moving . The electric curtain according to claim 3, wherein when the lower end of the curtain body stops moving, the microcontroller commands the driving device to drive the lower end of the curtain body to move up a first distance, and when the lower end of the curtain body has moved upward When moving the first distance, the microcontroller instructs the driving device to stop, so that the lower end of the curtain body stops moving. The electric curtain according to claim 2, wherein in the process of the lower end of the curtain body moving downward, a second detection result detected and obtained by the detection module represents that the curtain body is moved by a second external force, And when the microcontroller determines that the second detection result is a second trigger, the microcontroller instructs the driving device to stop, so that the lower end of the curtain body stops moving. The electric curtain according to claim 5, wherein when the lower end of the curtain body stops moving, the microcontroller instructs the driving device to start, so as to drive the lower end of the curtain body to move up a first distance, and at the bottom of the curtain body When the lower end has moved up the first distance, the microcontroller commands the driving device to stop, so that the lower end of the curtain body stops moving. The electric curtain according to claim 5, wherein the second detection result represents that when the lower end of the curtain body is lifted up by the second external force and then lowered, the microcontroller determines that the curtain body is subject to the second trigger. The electric window shade as claimed in claim 7, wherein the second trigger further comprises judging by the microcontroller that the lower end of the curtain body is lifted by the second external force for more than a first predetermined time, and continues the first predetermined time is put down within a second predetermined time. The electric curtain according to claim 1, wherein the corresponding relationship is that the lower end position of the curtain body is lower than the comparison position, and when the curtain body is triggered by the first trigger, the microcontroller instructs the driving device to start to drive The lower end of the curtain body moves upward, so that the curtain body is folded. According to the electric curtain according to claim 9, when the microcontroller determines that the lower end of the curtain body moves upward to a second predetermined position, the microcontroller commands the driving device to stop, so that the lower end of the curtain body stops moving. The electric window shade of claim 10, wherein the second predetermined position is the same as the comparison position. The electric curtain according to claim 9, wherein in the process of the lower end of the curtain body moving upward, the detection module detects and obtains a third detection result indicating that the curtain body is subjected to a downward third external force to To counteract the movement of the curtain body, and the microcontroller determines that the curtain body is triggered by a third trigger, the microcontroller instructs the driving device to stop, so that the lower end of the curtain body stops moving. The electric curtain according to claim 12, wherein the third detection result represents that the third external force is applied to the lower end of the curtain body, and when the lower end of the curtain body is relatively opposed to the upward movement of the curtain body, the microcontroller determines that the curtain is The body is subject to this third trigger. The electric curtain according to claim 9, wherein in the process of the lower end of the curtain body moving upward, the detection module detects and sequentially obtains a fourth detection result and a fifth detection result respectively representing the The curtain body is moved by a fourth external force and a fifth external force in sequence, and when the microcontroller determines that the curtain body is sequentially subjected to a fourth trigger and a fifth trigger, the microcontroller sequentially commands the driving device After stopping, the driving device is instructed to start and drive the lower end of the curtain body to move downward, so that the curtain body is unfolded. The electric curtain according to claim 14, wherein the fourth detection result represents that when the lower end of the curtain body is lifted up by the fourth external force, the microcontroller instructs the driving device to stop, so that the lower end of the curtain body stops moving , the fifth detection result represents that when the lower end of the curtain body is lowered by the fifth external force in the lifted state, the microcontroller instructs the driving device to start, so that the lower end of the curtain body moves downward. The electric curtain according to claim 14, wherein when the microcontroller determines that the lower end of the curtain body moves downward to a first predetermined position, the microcontroller instructs the driving device to stop, so that the lower end of the curtain body stops moving . The electric curtain according to claim 16, wherein when the lower end of the curtain body stops moving, the microcontroller instructs the driving device to start, so as to drive the lower end of the curtain body to move up a first distance, and when the lower end of the curtain body stops moving, When the lower end has moved up the first distance, the microcontroller commands the driving device to stop, so that the lower end of the curtain body stops moving. The electric curtain according to claim 9, wherein the detection module detects and obtains a sixth detection result during the upward movement of the lower end of the curtain body, indicating that the curtain body is moved by a sixth external force, and When the microcontroller determines that it is a sixth trigger, the microcontroller commands the driving device to stop, so that the lower end of the curtain body stops moving. The electric curtain according to claim 18, wherein when the lower end of the curtain body stops moving, the microcontroller instructs the driving device to start, so as to drive the lower end of the curtain body to move up a first distance, and the microcontroller When the controller judges that the lower end of the curtain body has moved up the first distance, the microcontroller commands the driving device to stop, so that the lower end of the curtain body stops moving. The electric window shade as claimed in claim 18, wherein the sixth trigger further comprises judging by the microcontroller that the lower end of the curtain body is lifted by the sixth external force for more than a first predetermined time, and continues the first predetermined time is put down within a second predetermined time. The electric curtain according to claim 1, wherein the detection module detects and obtains the first detection result representing that when the lower end of the curtain body is lifted up by the first external force and then lowered, the microcontroller determines the The curtain body is triggered by the first. The electric window shade as claimed in claim 21, wherein the first trigger further comprises judging by the microcontroller that the lower end of the curtain body is lifted by the external force for more than a first predetermined time, and at a time following the first predetermined time is put down within a second predetermined time. The electric window shade of claim 22, wherein the first predetermined time and the second predetermined time are changed according to the location information.

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