CN115992643A - Rolling curtain - Google Patents

Abstract

The invention discloses a rolling curtain, which comprises: the curtain comprises a roller tube, a curtain body, a first power component and a second power component; the coiled tube has opposite first and second ends; the curtain body is wound on the winding pipe; the first power assembly is arranged at the first end part of the coiled pipe, the first power assembly is provided with a motor, a transmission piece and a clutch, the transmission piece is connected with the coiled pipe and can coaxially rotate along with the coiled pipe, and the clutch is connected with the motor and the transmission piece and is suitable for switching the linkage and the non-linkage of the motor and the transmission piece; the second power assembly is provided with a bracket and a plurality of clockwork springs, the bracket is arranged at the second end part of the winding pipe, and the clockwork springs are arranged on the bracket at intervals so as to generate different tensile forces when the curtain body is pulled to be at different heights, so that the curtain body stays at any height. Therefore, the service life of the motor can be prolonged, the energy consumption is reduced, the cost of the curtain motor is reduced, the electric and manual switching of the curtain can be realized, and the failure rate is low.

Description

Rolling curtain

Technical Field

The invention relates to the technical field of curtains, in particular to a rolling curtain.

Background

The rolling curtain is also called rolling curtain, which is that the rolling pipe drives the whole curtain to roll up and down. Depending on the manner of operation, it can be classified into a roller blind, a spring blind, and an electric blind.

The power device of the rolling curtain in the related art is single, for example, the electric rolling curtain only drives the rolling tube to rotate by the motor and the speed reducer in a matching way to retract and retract the whole curtain, so that the service life of the motor is limited, the cost of the rolling curtain is increased, or the manual curtain regulation and the electric curtain regulation can be realized, but the clutch mechanism has a complex structure and high failure rate.

Disclosure of Invention

The present invention aims to solve at least to some extent one of the technical problems in the above-described technology. Therefore, the invention aims to provide the rolling curtain which can prolong the service life of a motor, reduce energy consumption, reduce the cost of the curtain motor, realize the electric and manual switching of the curtain and has low failure rate.

To achieve the above object, an embodiment of the present invention provides a roll-up window covering, including: the curtain comprises a roller tube, a curtain body, a first power component and a second power component;

the coil has opposite first and second ends;

the curtain body is wound on the winding pipe;

the first power assembly is arranged at the first end part of the coiled pipe and is provided with a motor, a transmission part and a clutch, the transmission part is connected with the coiled pipe and can coaxially rotate along with the coiled pipe, and the clutch is connected with the motor and the transmission part and is suitable for switching linkage and non-linkage of the motor and the transmission part;

the second power assembly is provided with a bracket and a plurality of clockwork springs, the bracket is arranged at the second end part of the winding pipe, and the clockwork springs are arranged on the bracket at intervals so as to generate different tensile forces when the curtain body is pulled to be at different heights, so that the curtain body stays at any height.

According to the rolling curtain provided by the invention, the curtain body is retracted and extended by adopting the cooperation of the first power component and the second power component, wherein the first power component utilizes the motor to drive the rolling tube to rotate so as to retract the curtain body, and the second power component utilizes the balance of the tension force generated by pulling the curtain body and the moment formed by the balance rod at the bottom of the curtain body and the spring on the bracket so as to enable the curtain body to stay at any height, so that partial power is provided by utilizing the second power component, the service life of the motor can be prolonged, the energy consumption is reduced, and the cost of the curtain motor is reduced; for the first power component, the clutch is utilized to carry out linkage and non-linkage switching on the motor and the transmission piece, so that the window curtain can be electrically and manually switched by controlling the motor to run or to be static, and the window curtain has a simple structure and low failure rate.

In addition, the rolling curtain provided by the invention can also have the following additional technical characteristics:

optionally, the clutch has a clutch pin, a clutch sleeve, a first magnetic attraction piece, a second magnetic attraction piece and a mounting seat, the clutch pin is rotatably inserted on the mounting seat and provided with a first extension part and a second extension part which extend out of the mounting seat, the first extension part is connected with the motor, the second extension part is rotatably inserted into the clutch sleeve, one end of the clutch sleeve is connected with the transmission piece, the other end of the clutch sleeve and the mounting seat jointly define a containing cavity, a pulling piece is arranged on the clutch pin in the containing cavity, a clamping groove is arranged on the clutch sleeve in the containing cavity, the first magnetic attraction piece is placed in the containing cavity, and the second magnetic attraction piece is arranged in the mounting seat;

when the motor runs, the poking piece moves the first magnetic attraction piece into the clamping groove, and the first magnetic attraction piece limits the poking piece so that the clutch pin shaft drives the clutch sleeve and the transmission piece to rotate to enable the motor to be linked with the transmission piece; when the motor is static, the second magnetic attraction piece adsorbs the first magnetic attraction piece to be separated from the clamping groove, and the motor is not linked with the transmission piece.

Further, a cone extends from the outer periphery of the clutch pin in the radial direction to form the plectrum.

Further, the second magnetic attraction piece surrounds the periphery of the clutch pin shaft.

Further, the first magnetic attraction piece is a magnet piece, and the second magnetic attraction piece is an iron piece.

Further, the first power assembly further comprises a supporting tube, a grating detector and an end cover, one end of the supporting tube is connected with the mounting seat, the other end of the supporting tube is connected with the grating detector, and the grating detector is arranged on the end cover.

Still further, the grating detector includes grating PCBA, grating and PCB box, the grating PCBA sets up the extension of stay tube, the grating sets up on the PCB box and with the PCB board in the PCB box is connected, when the stay tube rotates, the grating PCBA with the grating cooperation detects positive and negative rotation number of turns.

Optionally, the second power assembly further comprises a mounting rod, the bracket defines a plurality of clamping grooves, each clamping groove is suitable for placing one spring, and the mounting rod is inserted into the spring on the bracket to position the spring.

Further, the plurality of clamping grooves are arranged at intervals along the length direction of the bracket.

Further, the inner end of the clockwork spring is connected with the mounting rod, and the outer end of the clockwork spring is connected with the bracket.

Drawings

Fig. 1 is a schematic structural view of a roll-up window covering according to an embodiment of the present invention;

fig. 2 is an exploded view of a rolling shutter curtain according to an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2;

FIG. 4 is a schematic view of a first power assembly according to an embodiment of the present invention;

FIG. 5 is an exploded view of a first power assembly according to an embodiment of the present invention;

FIG. 6 is an enlarged view of a partial member of FIG. 5;

FIG. 7 is a cross-sectional view of a first power assembly according to an embodiment of the present invention;

FIG. 8 is an enlarged view of a partial member of FIG. 7;

FIG. 9 is a schematic structural view of a clutch sleeve according to an embodiment of the present invention;

FIG. 10 is a schematic structural view of a second power assembly according to an embodiment of the present invention;

FIG. 11 is an exploded view of a second power assembly according to an embodiment of the present invention;

reference numerals illustrate:

a coiled pipe 1;

a curtain body 2;

the first power component 3, the motor 31, the transmission part 32, the clamping seat 321, the outer sleeve 322, the clutch 33, the clutch pin 331, the pulling sheet 3311, the clutch sleeve 332, the first clamping groove 3321, the first magnetic attraction part 333, the second magnetic attraction part 334, the mounting seat 335, the fixed seat 3351, the inner sleeve 3352, the accommodating cavity 34, the battery pack 35, the supporting tube 36, the grating detector 37, the grating PCBA371, the grating 372, the PCB box 373 and the end cover 38;

the second power assembly 4, the bracket 41, the second catch 411, the clockwork spring 42 and the mounting bar 43.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

In order that the above-described aspects may be better understood, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.

The roller blind according to the embodiment of the present invention will be described with reference to fig. 1 to 11, in which the roller blind can be electrically retracted and extended, and also can be manually pulled to stay at a desired height.

The rolling curtain according to the embodiment of the invention comprises a rolling tube 1, a curtain body 2, a first power component 3 and a second power component 4.

Specifically, the coil 1 has opposite first and second ends; the curtain body 2 is wound on the winding pipe 1; the first power assembly 3 is arranged at the first end part of the coiled pipe 1, the first power assembly 3 is provided with a motor 31, a transmission piece 32 and a clutch 33, the transmission piece 32 is connected with the coiled pipe 1 and can coaxially rotate along with the coiled pipe 1, and the clutch 33 is connected with the motor 31 and the transmission piece 32 and is suitable for switching the linkage and the non-linkage of the motor and the transmission piece 32; the second power assembly 4 has a bracket 41 and a plurality of clockwork springs 42, the bracket 41 is arranged at the second end of the winding tube 1, and the clockwork springs 42 are arranged on the bracket 41 at intervals so that when the curtain body 2 is pulled to be at different heights, the clockwork springs 42 generate different pulling forces to enable the curtain body 2 to stay at any height.

That is, for the first power assembly 3, the roller tube 1 is driven to rotate by the rotation of the motor 31, so that the curtain 2 is electrically retracted in the roller tube 1; for the second power component 4, when the curtain body 2 is manually pulled, the winding tube 1 rotates, so that the clockwork spring 42 generates a pulling force, and the pulling force and the balance rod at the bottom of the curtain body 2 form moment balance, so that the curtain body 2 can stay at a required height. In addition, by providing the clutch 33 in the first power unit 3, the electric and manual switching of the winding tube 1 can be performed when the motor 31 is started or stopped.

Therefore, according to the rolling curtain provided by the invention, the first power component 3 and the second power component 4 are matched to realize the retraction of the curtain body 2, wherein the first power component 3 drives the rolling tube 1 to rotate by using the motor 31 to retract the curtain body 2, the second power component 4 uses the spring 42 on the bracket 41 to balance the tension generated by pulling the curtain body 2 and the balance rod at the bottom of the curtain body 2 to ensure that the curtain body 2 stays at any height due to the moment formed by the balance of the tension generated by pulling the curtain body 2 and the balance rod at the bottom of the curtain body 2, and therefore, the second power component 4 is used for providing partial power, so that the service life of the motor 31 can be prolonged, the energy consumption is reduced, the cost of a curtain motor is reduced, and the first power component 3 uses the clutch 33 to switch the motor 31 and the transmission member 32 in a linkage or non-linkage way, so that the window curtain can be switched electrically or manually by controlling the operation or the rest of the motor 31, and the structure is simple, and the failure rate is low.

For the first power component 3, referring to fig. 3-9, the clutch 33 in the first power component 3 includes a clutch pin 331, a clutch sleeve 332, a first magnetic attraction piece 333, a second magnetic attraction piece 334 and a mounting seat 335, the clutch pin 332 is rotatably inserted on the mounting seat 335 and has a first extension part and a second extension part extending out of the mounting seat 335, the first extension part is connected with the motor 31, the second extension part is rotatably inserted into the clutch sleeve 332, one end of the clutch sleeve 332 is connected with the transmission piece 32, the other end of the clutch sleeve 332 and the mounting seat 335 together define a containing cavity 34, a pulling piece 3311 is arranged on the clutch pin 331 positioned in the containing cavity 34, a first clamping groove 3321 is arranged on the clutch sleeve 332 positioned in the containing cavity 34, the first magnetic attraction piece 333 is placed in the containing cavity 34, and the second magnetic attraction piece 334 is arranged in the mounting seat 335; when the motor 31 is running, the pulling piece 3311 moves the first magnetic attraction piece 333 into the first clamping groove 3321, and the first magnetic attraction piece 333 limits the pulling piece 3311 so that the clutch pin 331 drives the clutch sleeve 332 and the transmission piece 32 to rotate, and the roller tube 1 electrically retracts the curtain 2; when the motor 31 is stationary, the second magnetic attraction piece 334 attracts the first magnetic attraction piece 333 away from the first clamping groove 3321, and the winding tube 1 is suitable for manually winding and unwinding the curtain 2.

In other words, the roller tube 1 is connected through the transmission piece 32 and can coaxially rotate along with the roller tube 1 to provide power transmission for the retraction and the release of the curtain body 2; the first extension part of the clutch pin shaft 331 is connected with the motor 31, the second extension part is rotatably inserted into the clutch sleeve 332, one end of the clutch sleeve 332 is connected with the transmission member 32, the other end of the clutch sleeve 332 and the mounting seat 335 jointly define the accommodating cavity 34, and the clutch pin shaft 331 positioned in the accommodating cavity 34 is provided with the poking plate 3311, so that the motor 31 can drive the poking plate 3311 to rotate in the accommodating cavity 34; the clutch sleeve 332 positioned in the accommodating cavity 34 is provided with a first clamping groove 3321, the accommodating cavity 34 is internally provided with a first magnetic attraction piece 333, and the adjacent mounting seat 335 is internally provided with a second magnetic attraction piece 334, so that when the motor 31 runs, the poking plate 3311 moves the first magnetic attraction piece 333 into the first clamping groove 3321, and the first magnetic attraction piece 3311 limits the poking plate 3311 so that the clutch pin shaft 331 drives the clutch sleeve 332 and the transmission piece 32 to rotate to electrically retract the roller tube 1; when the motor 31 is stationary, the second magnetic attraction piece 334 attracts the first magnetic attraction piece 333 to be separated from the first clamping groove 3321, so that the motor 31 is not driven to rotate when the curtain 2 is manually pulled.

Therefore, by utilizing the cooperation of the first magnetic attraction part 333 and the second magnetic attraction part 334 of the clutch 33, when the motor 31 rotates, the poking piece 3311 on the clutch pin 331 pokes the first magnetic attraction part 333 into the first clamping groove 3321, so that the clutch pin 331 can drive the clutch sleeve 332 and the transmission part 32 to rotate, and further drive the winding tube 1 to rotate, when the motor 31 is stationary, the second magnetic attraction part 334 adsorbs the first magnetic attraction part 333 to be separated from the first clamping groove 3321, thereby realizing the clutch effect, and further, the curtain body 2 can be retracted under the state of not driving the motor 31 to rotate by manually pulling the balance rod 23; the power component of the rolling curtain has simple structure and low failure rate, and can realize the electric and manual switching of the curtain.

For the transmission piece 32, the transmission piece 32 is connected with the coiled pipe 1 and can coaxially rotate along with the coiled pipe 1; specifically, the transmission member 32 includes a clamping seat 321 and an outer sleeve 322, the outer sleeve 322 is sleeved on the clutch sleeve 332, the clutch sleeve 332 is connected with the clamping seat 321, the clamping seat 321 is in buckling connection with the winding tube 1, therefore, during electric operation, the clutch 33 drives the transmission member 32 to be in transmission connection (linkage) with the motor 31, so that the motor 31 drives the clamping seat 321 to rotate to drive the curtain body 2 on the winding tube 1 to be retracted, and during manual operation, the clutch 33 disconnects (does not link) the transmission member 32 from the motor 31, so that the clamping seat 321 rotates along with the winding tube 1 and cannot be linked to the motor 31 when the winding tube 1 rotates. The connection between the clutch sleeve 332 and the holder 321 may be that an extension portion of the clutch sleeve 332 is embedded in a groove of the holder 321. The cooperation of cassette 321 and reelpipe 1 can be to set up the recess on the cassette 321, and the inner wall of reelpipe 1 sets up the arch for cassette 321 is connected with reelpipe 1 buckle, and hides whole power pack in reelpipe 1, makes the (window) curtain have the aesthetic property.

For the clutch pin 331, the position of the clutch pin 331 near the second extension portion is provided with a pulling piece 3311, so that the pulling piece 3311 can be driven to rotate by the rotation of the motor 31, the pulling piece 3311 pulls the first magnetic attraction piece 333 into the first clamping groove 3321 of the clutch cover 332, the pulling piece 3311 can be limited to rotate in the accommodating cavity 34 after the first magnetic attraction piece 333 enters the first clamping groove 3321, the clutch cover 33 can be driven to rotate, the clutch cover 33 drives the clamping seat 321 to rotate, and the rotating clamping seat 321 drives the winding tube 1 to rotate, so that the curtain body 2 is electrically retracted.

Further, the pulling piece 3311 may be formed by extending a cone from the outer circumference of the clutch pin 331 in the radial direction. When the clutch pin 331 rotates, the cone-shaped pulling piece 3311 gradually pulls the first magnetic attraction piece 333 away from the magnetic attraction of the second magnetic attraction piece 334 and then enters the first clamping groove 3321. The cone-shaped pulling piece 3311 may be a pyramid, and the side surface of the pyramid may gradually pull the first magnetic attraction member 333 away from the magnetic attraction of the second magnetic attraction member 334.

For the clutch sleeve 332, one end of the clutch sleeve 332 is connected with the transmission member 32, the other end of the clutch sleeve 332 and the mounting seat 335 together define the accommodating cavity 34, the accommodating cavity 34 is defined by the other end of the clutch sleeve 332 and the mounting seat 335 together, the shifting piece 3311 on the clutch pin 331 can be limited to rotate in the accommodating cavity 34, and the first magnetic attraction member 333 is limited in the accommodating cavity 34; the clutch sleeve 332 in the accommodating cavity 34 is provided with a first clamping groove 3321, when the motor 31 runs, the poking plate 3311 moves the first magnetic attraction piece 333 into the clamping groove 3311, and the first magnetic attraction piece 333 limits the poking plate 3311 so that the clutch pin shaft 331 drives the clutch sleeve 332 and the transmission piece 32 to rotate, and the roller tube 1 electrically retracts the curtain body 2. It can be appreciated that the clutch sleeve 332 has a concave cavity towards one end of the mounting seat 335, the concave cavity cooperates with the mounting seat 335 to form the accommodating cavity 34, the first clamping groove 3321 is disposed on the inner side wall of the accommodating cavity 34, when the first magnetic attraction member 333 is moved into the first clamping groove 3321, the top of the cone-shaped pulling piece 3311 is located in the clamping position formed between the first magnetic attraction member 333 and the inner side wall of the accommodating cavity 34, the first clamping groove 3321 limits the movement of the first magnetic attraction member 333, and the first magnetic attraction member 333 limits the rotation of the pulling piece 3311, so that the pulling piece drives the clutch sleeve 332 to rotate integrally.

For the first magnetic attraction piece 333, the first magnetic attraction piece 333 is placed in the accommodating cavity 34, the first magnetic attraction piece 333 is moved into a first clamping groove 3321 on the clutch sleeve 332 by rotating the pulling piece 3311, the first magnetic attraction piece 333 limits the pulling piece 3311 so that the clutch pin shaft 331 drives the clutch sleeve 332 and the transmission piece 32 to rotate, the winding tube 1 electrically retracts the curtain body 2, when the motor 31 is stationary, the pulling piece 3311 and the first magnetic attraction piece 333 are dislocated, and the first magnetic attraction piece resets due to the magnetic attraction effect between the second magnetic attraction piece 334 and the first magnetic attraction piece 333, so that the clutch sleeve 332 does not drive the clutch pin shaft 331 to rotate when the winding tube 1 drives the transmission piece 32 and the clutch sleeve 332 to rotate. Wherein, the first magnetic attraction member 333 may be a magnet member, and the first magnetic attraction member 333 may be a cylindrical magnet directly placed in the accommodating chamber 34.

For the second magnetic attraction piece 334, the second magnetic attraction piece 334 surrounds the periphery of the clutch pin 331; the second magnetic attraction member 334 may reset the first magnetic attraction member 333 when the motor 31 is stationary. Specifically, the second magnetic attraction member 334 may be an iron ring, and the iron ring is sleeved on the clutch pin 331, where the outer diameter of the iron ring may be slightly larger than the diameter of the clutch pin 331, and a distance remains between the outer periphery of the iron ring and the inner sidewall of the accommodating cavity 34. When the motor 31 stops rotating, the inner sleeve 3352 can attract the first magnetic attraction piece 333 on the first clamping groove 3321 by the magnetic attraction cooperation of the second magnetic attraction piece 334 and the first magnetic attraction piece 333, so that the shifting piece 3311 and the clutch sleeve 332 are in a disengaged state.

For the mounting seat 335, the mounting seat 335 includes a fixed seat 3351 and an inner sleeve 3352, the outer end surface of the inner sleeve 3352 and the clutch sleeve 332 together define the accommodating cavity 34, one end of the fixed seat 3351 is provided with a convex column, and the convex column is inserted into the inner sleeve 3352 to abut the second magnetic attraction piece 334 on the inner end surface of the inner sleeve 3352; the outer end surface of the inner sleeve 3352 and the clutch sleeve jointly define a containing cavity 34, so that the first magnetic attraction piece 333 and the poking plate 3311 of the clutch pin 331 are limited to move in the containing cavity 34; the boss is inserted into the inner sleeve 3352 to abut the second magnetic attraction piece 334 against the inner end surface of the inner sleeve 3352 such that the second magnetic attraction piece 334 is defined on the inner end surface of the inner sleeve 3352 to facilitate assembly of the second magnetic attraction piece 334. In addition, the assembly of the fixed base 3351 and the inner sleeve 3352 may be a pin-hole fitting structure.

For the motor 31, the power output shaft of the motor 31 is connected with the clutch pin 331. Specifically, a passage is provided in the clutch pin 331 in the axial direction, and the power output shaft of the motor 31 is inserted in the passage.

In addition, the first power assembly 3 may further include a battery pack 35 and a support tube 36, the battery pack 35 being disposed within the support tube 36 and connected to the motor 31, the battery pack 35 being configured to supply power to the motor 31.

In other examples, the first power assembly 3 may further include a grating detector 37 and an end cover 38, one end of the support tube 36 is connected to the mounting seat 335, the other end is connected to the grating detector 37, the mounting seat 335 is connected to one end of the support tube 36, so that the power assembly of the roller blind can be integrally reinforced and supported, and meanwhile, the motor 31 and the battery pack 35 are arranged inside the support tube 36, so that the support tube 36 and the roller tube 1 are more convenient to install and more attractive.

For the grating detector 37, the grating detector 37 is provided on the end cover 38; the grating detector 37 comprises a grating PCBA371, a grating 372 and a PCB box 373, wherein the grating PCBA371 is arranged at the extension part of the support tube 36, and the grating 372 is arranged on the PCB box 373 and connected with a PCB 374 in the PCB box 373; when the support tube 36 rotates, the grating PCBA371 and the grating 372 cooperate to detect the number of positive and negative rotation turns; the number of the forward and reverse rotation circles of the support tube 36 is detected through the cooperation of the grating PCBA371 and the grating 372, so that the motor 31 can be accurately controlled to rotate to control the retraction position of the curtain body 2, in addition, the PCB 374 can control the output torque and the rotation direction of the motor 31, so that the curtain body 2 can move up and down, the speed is adjustable, the highest point and the lowest point are adjustable, and the PCB 374 adopts the existing editable control technology and is not described in detail herein. Therefore, through the arrangement of the grating detector 37, the window curtain can be electrically operated more intelligently, and the one-key opening and one-key closing of the window curtain, the overload protection of the motor and the setting of the minimum parking position of the window curtain are realized.

Referring to fig. 10 and 11, for the second power assembly 4, it further includes a mounting rod 43, and a plurality of second clamping slots 411 are defined on the bracket 41, each second clamping slot 411 is adapted to place a spiral spring 42, and the mounting rod 43 is inserted into the spiral spring 42 on the bracket 41 to position the spiral spring 42.

Wherein the number of springs 42 may be based on the weight requirements of the curtain 2.

As for the second card slots 411 on the holder 41, a plurality of second card slots 411 are arranged at intervals along the length direction of the holder 41. In this way, a plurality of the mainsprings 42 are arranged at intervals along the length direction of the bracket 41 to act together.

Further, an inner end of the mainspring 42 is connected to the mounting rod 43, and an outer end of the mainspring 42 is connected to the bracket 41. That is, the plurality of clockwork springs 42 are integrally positioned on the bracket 41 through the mounting rod 43, and then are connected with the mounting rod 43 through the inner end thereof, and the outer end is connected with the bracket 41, so that when the curtain body 2 is pulled to drive the winding tube 1 to rotate, the clockwork springs 42 generate pulling force. The tension and the balance of the moment formed by the curtain body 2 and the balance rod at the bottom of the curtain body 2 play a role in enabling the curtain body 2 to stay at any height by slight dragging or tension.

For the connection of the bracket 41 and the coil 1, a protrusion is arranged in the coil 1, a groove is arranged on the bracket 41, and the protrusion is matched with the groove in a concave-convex manner so as to set the second power assembly 4 at the second end part of the coil 1. Thus, when the curtain body 2 is pulled, the winding tube 1 rotates to rotate the bracket 41, and the mainspring 42 pulls.

Therefore, the component matched with the spring 42 and the bracket 41 can be used as a power component for driving the curtain body 2 to move and then positioning, and the pressure of the motor 31 can be shared, so that the service life of the motor 31 is prolonged, the energy consumption is reduced, and the cost is reduced.

For a better understanding of the present embodiment, the workflow in connection with the present embodiment is further described: in the electric state, when the motor 31 rotates, the shifting piece 3311 on the clutch pin 331 can be driven to rotate so as to shift the first magnetic attraction piece 333 to move, when the first magnetic attraction piece 333 moves into the first clamping groove 3321 in the clutch sleeve 332, the first magnetic attraction piece 333 limits the shifting piece 3311 to drive the clutch pin 331 to drive the clutch sleeve 332 and the transmission piece 32 to rotate so as to electrically retract the shutter 2 of the winding tube 1, when the motor 31 is static, the second magnetic attraction piece 334 adsorbs the first magnetic attraction piece 333 to be separated from the first clamping groove 3321, the clutch effect is realized, the switching from the electric state to the manual state is realized, when the manual state is realized, due to the arrangement of the second power component 4, when the balance bar at the bottom of the shutter 2 is at different heights, the spring 42 generates different tensile forces so that the shutter 2 stays at any height, wherein the spring 42 is matched with the balance weight of the shutter 2 and the balance bar, the lower the tensile force of the spring 42 is larger, and the opposite to the rising of the shutter 2.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms should not be understood as necessarily being directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Further, one skilled in the art can engage and combine the different embodiments or examples described in this specification.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims (10)

1. A roller blind, comprising: the curtain comprises a roller tube, a curtain body, a first power component and a second power component;

the coil has opposite first and second ends;

the curtain body is wound on the winding pipe;

the first power assembly is arranged at the first end part of the coiled pipe and is provided with a motor, a transmission part and a clutch, the transmission part is connected with the coiled pipe and can coaxially rotate along with the coiled pipe, and the clutch is connected with the motor and the transmission part and is suitable for switching linkage and non-linkage of the motor and the transmission part;

the second power assembly is provided with a bracket and a plurality of clockwork springs, the bracket is arranged at the second end part of the winding pipe, and the clockwork springs are arranged on the bracket at intervals so as to generate different tensile forces when the curtain body is pulled to be at different heights, so that the curtain body stays at any height.

2. The window shade of claim 1, wherein the clutch has a clutch pin, a clutch sleeve, a first magnetic attraction piece, a second magnetic attraction piece and a mounting seat, the clutch pin is rotatably inserted in the mounting seat and has a first extension part and a second extension part which extend out of the mounting seat, the first extension part is connected with the motor, the second extension part is rotatably inserted into the clutch sleeve, one end of the clutch sleeve is connected with the transmission piece, the other end of the clutch sleeve and the mounting seat together define a containing cavity, a pulling piece is arranged on the clutch pin in the containing cavity, a clamping groove is arranged on the clutch sleeve in the containing cavity, the first magnetic attraction piece is placed in the containing cavity, and the second magnetic attraction piece is arranged in the mounting seat;

when the motor runs, the poking piece moves the first magnetic attraction piece into the clamping groove, and the first magnetic attraction piece limits the poking piece so that the clutch pin shaft drives the clutch sleeve and the transmission piece to rotate to enable the motor to be linked with the transmission piece; when the motor is static, the second magnetic attraction piece adsorbs the first magnetic attraction piece to be separated from the clamping groove, and the motor is not linked with the transmission piece.

3. The window covering of claim 2, wherein the clutch pin has a taper extending radially from an outer periphery thereof to construct the paddle.

4. The window covering of claim 2, wherein the second magnetic attraction member surrounds the periphery of the clutch pin.

5. The window covering of claim 2, wherein the first magnetic element is a magnet and the second magnetic element is a iron.

6. The window covering of claim 2, wherein the first power assembly further comprises a support tube, a grating detector, and an end cap, wherein one end of the support tube is connected to the mounting base, and the other end is connected to the grating detector, and the grating detector is disposed on the end cap.

7. The window shade of claim 6, wherein the grating detector comprises a grating PCBA, a grating, and a PCB box, the grating PCBA disposed in an extension of the support tube, the grating disposed on the PCB box and connected to a PCB within the PCB box, the grating PCBA cooperating with the grating to detect the number of turns of the positive and negative directions as the support tube rotates.

8. The window covering of claim 1, wherein said second power assembly further comprises a mounting rod defining a plurality of detents thereon, each detent being adapted to receive one of said wrap springs, said mounting rod being inserted into the wrap spring on said bracket to position said wrap spring.

9. The window covering of claim 8, wherein a plurality of said clip grooves are spaced along the length of said bracket.

10. A rolling shutter curtain as claimed in claim 8, characterized in that the inner end of the clockwork spring is connected to the mounting rod and the outer end of the clockwork spring is connected to the bracket.

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