CN109667525B - Curtains and their spring drive systems - Google Patents

Abstract

A spring drive system suitable for curtains, comprising a housing; a plurality of rotating members pivotally connected to the housing and connected to each other, so that the plurality of rotating members rotate in conjunction with the housing, wherein the plurality of rotating members comprises a roller connected to a suspension member and rotatable relative to the housing to retract the suspension member or extend the suspension member from the roller; a spring assembled to the housing and capable of causing the roller to rotate in a direction of retracting the suspension member; and a latch assembled to the housing and capable of engaging or disengaging with one of the plurality of rotating members to prevent or allow the roller to rotate.

Description

Curtains and their spring drive systems

technical field

The present invention relates to a curtain and a spring drive system for the curtain.

Background technique

There are many types of curtains on the market today, such as Venetian blinds, Roman blinds and honeycomb blinds. When the curtains are lowered, the windows can be shaded to reduce light entering the house and improve privacy. Generally speaking, curtains are provided with control ropes, which can drive the bottom rail of the curtain to rise or fall. In particular, the bottom rail can be raised by means of a roller take-up hanger, and the hanger can be extended from the roller so that the bottom rail can be lowered.

However, due to the concern that the control cord may restrain children, a cordless curtain has been developed. This cordless curtain can raise and lower the bottom rail by means of an electric motor or a coil spring box. Coil spring boxes used in window blinds usually consist of multiple springs that provide torsion to maintain the bottom rail at the desired height. However, the assembly of such a coil spring box is usually complicated, and the torsion force of the spring must be transmitted to the drum through a plurality of moving parts, which disadvantageously increases the weight of the coil spring box in the curtain. In addition, if the torque provided by the coil spring box is insufficient, it may not be possible to ensure that the bottom rail can be positioned at the desired height.

Therefore, there is a need for a window covering with an improved drive system that overcomes the aforementioned disadvantages.

SUMMARY OF THE INVENTION

The present invention provides a spring drive system suitable for curtains, which comprises a casing; a plurality of rotating parts are pivotally connected to the casing and connected to each other, so that the rotating parts are linked and rotated relative to the casing , wherein the plurality of rotating members includes a roller, the roller is connected with a suspension member and can be rotated relative to the casing to wind up the suspension member or make the suspension member extend from the roller; a spring , assembled with the casing, and the spring can urge the roller to rotate in the direction of winding up the suspending member; and a latching member, assembled with the casing, and the latching member can be combined with the plurality of One of the rotating members is engaged or disengaged to prevent or allow the drum to rotate.

In addition, the present invention also provides a curtain, which includes a top rail; a shielding structure, which can be suspended from the top rail; a bottom part, which is arranged at the bottom end of the shielding structure; and the spring drive system, which is installed on the bottom, and the suspension piece is fixedly connected with the top rail.

Description of drawings

FIG. 1 is a perspective view of a curtain in a folded state according to an embodiment of the present invention.

FIG. 2 is a perspective view of the curtain in an unfolded state.

FIG. 3 shows a top view of the curtain.

Figure 4 shows an exploded view of the bottom of the curtain.

FIG. 5 is a perspective view of the spring drive system provided in the bottom of the curtain.

Figure 6 shows an exploded view of the spring drive system.

Figure 7 shows a cross-sectional view of the spring drive system, wherein the spring drive system is in a locked state.

FIG. 8 is a cross-sectional view of the spring drive system in an unlocked state.

FIG. 9 is an enlarged view of the operating member in the spring drive system moving toward the unlocked state.

FIG. 10 is an enlarged view showing the movement of the operating member toward the locked state in the spring drive system.

11 and 12 are cross-sectional views illustrating the safety lock mechanism in the spring drive system.

13 and 14 are perspective views showing the operation of the window covering.

FIG. 15 is a perspective view of another window covering suitable for the spring drive system of the present invention.

FIG. 16 is another perspective view of another window covering suitable for the spring driving system of the present invention.

Detailed ways

FIG. 1 is a perspective view of the curtain 100 in a collapsed state according to an embodiment of the present invention, FIG. 2 is a perspective view of the curtain 100 in an unfolded state, and FIG. 3 is a top view of the curtain 100 . Referring to FIGS. 1 to 3 , the window covering 100 may include a top rail 102 , a shielding structure 104 , and a bottom 106 disposed at the bottom of the shielding structure 104 . The top rail 102 can be of any type and shape. The top rail 102 can be fixed to the top of the window, and the shading structure 104 and the bottom 106 can be suspended from the top rail 102 .

The shielding structure 104 may be any suitable structure. The screening structure 104 shown in FIGS. 1 and 2 includes, for example, a plurality of slats 108 . The slats 108 may be wood chips or other materials. The slats 108 extend laterally, and the front and rear sides of the slats 108 can be respectively connected with a plurality of ladder cords 110, and the ladder cords 110 are connected to the top rail 102, so that the slats 108 can be suspended from the ladder cords 110. Below the top rail 102 .

According to an embodiment, the top rail 102 can be assembled with a plurality of actuating components 112 , a transmission shaft 114 , a gear component 116 and an operating rod 118 . The actuating assembly 112 , the transmission shaft 114 and the gear assembly 116 are respectively installed in the top rail 102 . The ladder ropes 110 are respectively wound around the actuating assemblies 112 , the transmission shafts 114 are respectively connected with the actuating assemblies 112 and the gear assemblies 116 , and the operating rods 118 are connected with the gear assemblies 116 and protrude from the top rail 102 . When the user rotates the operating rod 118, the transmission shaft 114 can be driven to rotate through the gear assembly 116, and the rotation of the transmission shaft 114 can synchronously drive the actuating assembly 112 to rotate, thereby causing the ladder rope 110 to vertically displace and adjust the inclination angle of the curtain 108. .

The bottom 106 is disposed at the bottom end of the shielding structure 104 and can move vertically relative to the top rail 102 so as to expand and collapse the shielding structure 104 . According to one embodiment, the bottom 106 may be an elongated track. However, any type of carrier may be suitable as the base 106 . In other embodiments, the bottom 106 may also be the lowest position of the shielding structure 104 .

1 to 3 , FIG. 4 is an exploded view of the bottom 106 , FIG. 5 is a perspective view of the spring drive system 120 provided in the bottom 106 , FIG. 6 is an exploded view of the spring drive system 120 , and FIG. 7 A cross-sectional view of the spring drive system 120 is shown. 4-7, the bottom 106 may include an elongated rail 106A, two side covers 106B and a cover 106C. The rail 106A has a hollow inner side, which forms an accommodating groove of the bottom 106 , and the two side covers 106B are respectively fixed to the left and right ends of the rail 106A. The spring drive system 120 can be assembled in the accommodating groove of the bottom 106 and can be covered by the cover sheet 106C. The spring drive system 120 may include two suspension members 122 , 124 , each of which may extend vertically and be connected to the top rail 102 such that the spring drive system 120 and the base 106 may be suspended from the top rail 102 . The spring drive system 120 has a locked state and an unlocked state, the spring drive system 120 can maintain the bottom 106 in any vertical position when the spring drive system 120 is in the locked state, and when the spring drive system 120 is switched from the locked state to the unlocked state, the bottom 106 is allowed to move up and down, In order to adjust the vertical range of the shielding structure 104 .

Referring to FIGS. 4 to 7 , the spring drive system 120 may include two suspension members 122 , 124 , a housing 128 , two springs 130 , 132 , and a plurality of interlocking rotating members, wherein the plurality of rotating members The assembly may include two rollers 134 , 136 and a plurality of gears 138 , 140 , 142 .

When the spring drive system 120 is installed on the bottom 106 , the housing 128 can be fixedly connected with the bottom 106 . According to an embodiment, the casing 128 may include a shell portion 144, and the shell portion 144 may be formed by assembling an upper cover 144A and a lower cover 144B. When the upper cover 144A and the lower cover 144B are fixedly connected to each other, a hollow interior of the shell portion 144 can be formed to accommodate the springs 130 , 132 , the rollers 134 , 136 and the gears 138 , 140 , 142 .

The roller 134 is fixedly connected with the gear 138 , and the roller 134 is provided with two surfaces 134A and 134B on opposite sides of the gear 138 , respectively. The drum 134 and the gear 138 can be pivoted coaxially with the shell portion 144 of the housing 128 by the pivot axis P1, so that the drum 134 and the gear 138 can rotate relative to the housing 128 around the pivot axis P1 synchronously.

The drum 136 is fixedly connected with the gear 140 , and the drum 136 is respectively provided with two surface-like surfaces 136A and 136B on opposite sides of the gear 140 . The drum 136 and the gear 140 can be pivoted coaxially with the shell portion 144 of the casing 128 by the pivot axis P2, so that the drum 136 and the gear 140 can rotate relative to the casing 128 around the pivot axis P2 synchronously.

Two opposite sides of the gear 142 may be symmetrically fixed with two protruding shaft portions 142A, respectively. The gear 142 and the shaft portion 142A can be pivoted coaxially with the housing portion 144 of the housing 128 by the pivot axis P3, and the gear 142 is meshed with the gears 138 and 140, respectively. The pivot axes P1, P2, P3 are parallel. The gear 142 and the shaft portion 142A are rotatable relative to the housing 128 around the pivot axis P3, and through the connection between the rollers 134, 136 and the gears 138, 140, 142, the rollers 134, 136 and the gears 138, 140, 142 are connected It can rotate in conjunction with the housing 128 .

The suspension members 122, 124 are, for example, ropes or belts. The suspension member 122 vertically passes through the shielding structure 104 , and two opposite ends of the suspension member 122 are fixed to the top rail 102 and the surface 134A of the drum 134 , respectively. The suspension member 124 vertically passes through the shielding structure 104 , and two opposite ends of the suspension member 124 are fixed to the top rail 102 and the surface 136A of the drum 136 , respectively. Through the meshing relationship between the two rollers 134 , 136 and the gear 142 , the rollers 134 , 136 can rotate in conjunction with each other, so as to respectively wind the suspending members 122 , 124 or make the suspending members 122 , 124 extend from the rollers 134 , 136 .

Referring to FIG. 6 , the housing portion 144 may be provided with rod body groups 141A, 141B and tension plates 143A, 143B. The rod bodies 141A and 141B can respectively guide the movement of the suspension members 122 and 124 along the horizontal plane, while the tension plates 143A and 143B press the suspension members 122 and 124 respectively, so that the suspension members 122 and 124 are wound around the rollers 134 and 124 respectively. 136 can maintain moderate tension. In addition, cross bars 145A and 145B may be fixed in the shell portion 144 , and the suspension members 122 and 124 may be extended from a substantially horizontal direction to a vertical direction via the cross bars 145A and 145B, respectively.

In order to facilitate the assembly of the springs 130 and 132 to the housing 128 , the two shaft sleeves 146 and 147 can be pivotally connected to opposite sides of the gear 142 via the two shaft portions 142A, respectively. The shaft sleeves 146 and 147 are arranged coaxially with the gear 142 , and the shaft sleeves 146 and 147 can rotate independently about the pivot axis P3 relative to the gear 142 and the housing 128 respectively. The spring 130 can be a coiled ribbon spring and can be assembled around the shaft sleeve 146 , so that the spring 130 , the gear 142 and the shaft sleeve 146 are assembled to the housing 128 along the same pivot axis P3 . Two ends of the spring 130 are respectively fixed to the surface 134B of the drum 134 and the shaft sleeve 146 . Thus, the suspension 122 and the spring 130 may be commonly connected to the drum 134 on opposite sides of the gear 138 .

The spring 132 can be a coiled ribbon spring and can be assembled around the shaft sleeve 147 , so that the spring 132 is also assembled to the housing 128 along the same pivot axis P3 as the gear 142 and the shaft sleeve 147 . Two ends of the spring 132 are respectively fixed to the surface 136B of the drum 136 and the shaft sleeve 147 . Accordingly, the hanger 124 and the spring 132 may be commonly connected to the drum 136 on opposite sides of the gear 140 .

When the rollers 134 and 136 rotate to extend the suspension members 122 and 124 , the springs 130 and 132 extend from the bushings 146 and 147 respectively and wrap around the surface 134B of the roller 134 and the surface 136B of the roller 136 . In addition, the springs 130 and 132 can also extend from the drums 134 and 136 respectively by their own spring action and drive the drums 134 and 136 to rotate, so as to wind up the suspension members 122 and 124 .

Continuing to refer to FIGS. 4 to 7 , the spring drive system 120 may further include a latch member 150 , an operating member 152 , a plurality of gears 154 and a spring 156 . The latch member 150 is assembled with the housing 128 and can be engaged or disengaged with one of the aforementioned plurality of rotating members (ie, including the rollers 134, 136 and the gears 138, 140, 142) to prevent or allow The linked rotation of the plurality of rotating parts. According to an embodiment of the present invention, the latch 150 can be engaged with or disengaged from the gear 142 , however, the present invention is not limited thereto, and the latch 150 can also be engaged with the rollers 134 , 136 and the gears 138 , 140 , 142 Either one is engaged or disengaged to prevent or allow the interlocking rotation of these rotating members. To facilitate the assembly of the latch member 150 , the operating member 152 , the gear 154 and the spring 156 , the housing 128 may further include a shell portion 158 . The housing portion 158 is fixedly connected with the housing portion 144 and protrudes from one side of the housing portion 144 , and the latch member 150 , the operating member 152 , the gear 154 and the spring 156 are at least partially accommodated in the housing portion 144 .

The latch member 150 is slidably assembled with the shell portion 158 of the housing 128 , so that the latch member 150 can slide relative to the housing 128 so as to engage or disengage the gear 142 . According to one embodiment, an opening 160 may be formed in the housing portion 144 , and the latch 150 may slide through the opening 160 to engage or disengage the gear 142 . When the latch 150 is engaged with the gear 142, it can prevent the rotation of the rollers 134, 136 and the gears 138, 140, 142, and when the latch 150 is disengaged from the gear 142, the rollers 134, 136 and the gears 138, 140, 142 are allowed to rotate. 142 spins.

Referring to FIG. 4 to FIG. 7 , the operating member 152 is slidably assembled to the shell portion 158 of the housing 128 , and the operating member 152 is exposed for user operation. According to an embodiment, the operating member 152 can be assembled to the housing portion 158 by means of screws 153 . The operating member 152 and the latching member 150 can slide in parallel with respect to the housing 128 along the same axis. The operating member 152 is connected with the latching member 150 , and the connection relationship enables the operating member 152 to move the latching member 150 when the operating member 152 is operated, so that the latching member 150 is disengaged from the gear 142 . According to an embodiment, the operating member 152 can be connected with the latch member 150 via the gear 154 . More specifically, the latch 150 may be provided with a protruding tooth row 162 , the gear 154 may be engaged with the protruding tooth row 162 and pivotally connected with the shell portion 158 of the housing 128 via the shaft body 155 , and the operating member 152 may be provided with There are protruding teeth 164 . The protruding teeth row 162 and the latching member 150 are fixedly connected, for example, the protruding teeth row 162 and the latching member 150 may be integrally formed. Thereby, when the operating member 152 slides relative to the housing 128 between the first position shown in FIG. 7 and the second position shown in FIG. 8 , the latch member 150 can be driven to slide, wherein the latch member 150 is operating When the member 152 is in the first position, it engages with the gear 142, which is the locking state of the spring drive system 120, and when the operating member 152 is in the second position, the latch member 150 is disengaged from the gear 142, which is the spring drive system 120. the unlocked state.

9 and 10 are enlarged views showing the movement of the operating member 152 toward the unlocking state and the locking state, respectively. Referring to FIGS. 8 and 9 , when the operating member 152 moves in the direction X2 (ie, the direction toward the inside of the housing portion 158 ), the protruding teeth 164 of the operating member 152 can force the gear 154 to rotate, and the rotation of the gear 154 drives the latch member 150 toward The movement in the opposite direction of X2 to X1 makes the latch 150 disengage from the gear 142 . Referring to FIGS. 7 and 10 , when the latch 150 slides toward the direction X2 and engages with the gear 142 , the gear 154 can be rotated, and the operating element 152 can move toward the opposite direction X1 of X2 (ie, the direction extending from the housing 158 ) )slide.

Continuing to refer to FIGS. 4 to 8 , the spring 156 is connected to the latch 150 so that the spring 156 can urge the latch 150 to slide in the direction X2 so as to maintain the latch 150 and the gear 142 engaged. According to an embodiment, both ends of the spring 156 can be connected to the latch member 150 and the operating member 152 respectively, so that the spring 156 can also exert force on the operating member 152, thereby assisting in moving the operating member 152 to the first position shown in FIG. 7 . Location.

According to an embodiment of the present invention, when the spring drive system 120 is in a locked state, in order to prevent the latch 150 from being forced to move in the direction X1 and released due to the excessive rotational force of the gear 142, the spring drive system 120 may also be provided with a Safety lock mechanism. Referring to FIGS. 11 and 12 , the safety lock mechanism may include a stopper portion 166 , which is connected, for example, to the shell portion 158 of the housing 128 . According to an embodiment, the stopper portion 166 is, for example, an elastic sheet having a protrusion 168 , and a slope 170 is provided on one side of the stopper portion 166 . Referring to FIG. 11, when the latch 150 is engaged with the gear 142, the stopper 166 is in the blocking position, so that the protrusion 168 of the stopper 166 can contact the side edge 172 of the latch 150 and produce a blocking effect, Thus, the latch member 150 is prevented from sliding in the unlocking direction. Referring to FIG. 12 , when the operating member 152 is pressed and slid toward the direction X2, the operating member 152 can abut against the inclined surface 170 of the stopper portion 166 and push the stopper portion 166 from the blocking position to the passing position, so that the latching member 150 is moved The side edge 172 can slide toward the direction X1 through the protrusion 168 of the stopper portion 166 , so that the latch 150 is disengaged from the gear 142 . When the latch 150 recovers to engage with the gear 142 , the stopper 166 can move from the passing position shown in FIG. 12 to the blocking position shown in FIG. 11 by its own elasticity.

1, 2 and 4 to 6, when the spring drive system 120 is mounted on the base 106, the gears 138, 140, 142 are arranged generally horizontally, the pivot axes P1, P2, P3 extend generally vertically, and the operating member 152 is exposed On one side of the bottom 106 to facilitate the user's operation.

Referring to FIGS. 1 to 12 , FIGS. 13 and 14 are schematic views of the operation of the window covering 100 . Referring to FIG. 13 , to adjust the vertical position of the bottom 106 , the user can press the operating member 152 . As shown in FIG. 9 , when the operating member 152 is pressed, it can move toward the inner side of the housing portion 158 in the direction X2 , and drives the latching member 150 to move in the opposite direction X1 of X2 through the gear 154 , so that the latching member 150 is disengaged from the gear 142 snap. The spring drive system 120 is thereby switched from the locked state to the unlocked state.

When the operating member 152 maintains the pressed state, the user can move the bottom portion 106 up and down to a desired vertical position. When the bottom 106 moves upward, the springs 130 , 132 can urge the drums 134 , 136 to rotate in the direction of winding up the suspension members 122 , 124 . As the bottom 106 moves down, the rollers 134, 136 are forced to rotate in the direction of the extension hangers 122, 124.

Referring to FIG. 14 , when the bottom 106 reaches the desired vertical position, the user can release the operating member 152 . Then, as shown in FIG. 10 , the spring 156 can urge the latch member 150 to slide toward the direction X2 so that the latch member 150 is engaged with the gear 142 . At the same time, the spring 156 can also urge the operating member 152 to slide relative to the housing 128 in the direction X1 to restore its original first position. The spring drive system 120 is thereby switched from the unlocked state to the locked state. The engagement of the latch 150 with the gear 142 prevents rotation of the rollers 134, 136 and gears 138, 140, 142, allowing the bottom 106 to remain static in place.

The spring drive system 120 of the present invention can be applied to different types of curtains. For example, FIG. 15 is a perspective view illustrating another window covering 100' applicable to the spring driving system 120 of the present invention, wherein the shielding structure 104' of the window covering 100' includes a honeycomb structure. FIG. 16 is another perspective view of another window covering 100 ″ applicable to the spring driving system 120 of the present invention, wherein the shielding structure 104 ″ of the window covering 100 ″ includes a plurality of aluminum sheets.

The spring drive system of the present invention has the advantage of being cost effective. Because the spring drive system is provided with a latch, even if the spring action of the spring drive system is not enough to offset the gravity of the shielding structure and the bottom, the latching action of the latch can still effectively prevent the rotation in the spring drive system. Accidental rotation of the piece ensures that the shading structure and base can be maintained in any desired position.

The above description is based on various embodiments of the present invention, wherein various features may be implemented in a single or different combination. Therefore, the disclosures of the embodiments of the present invention are specific examples for illustrating the principles of the present invention, and the present invention should not be limited to the disclosed embodiments. Further, the foregoing description and the accompanying drawings are for illustrative purposes only, and are not intended to limit the present invention. Changes or combinations of other elements are possible without departing from the spirit and scope of the present invention.

Description of reference numerals

100, 100’, 100” Curtains

102 Top Rail 104, 104’, 104” Shade Structure

106 Bottom 106A Track

106B Side Cover 106C Cover Sheet

108 Curtain 110 Ladder rope

112 Actuator assembly 114 Drive shaft

116 Gear assembly 118 Operating rod

120 Spring drive system 122, 124 Suspension

128 Housing 130, 132 Spring

134, 136 Rollers 134A, 134B, 136A, 136B Surfaces

138, 140, 142 Gear 142A Shaft

144 Shell 144A Cover

144B lower cover 141A, 141B rod body set

143A, 143B Tension Plate 145A, 145B Crossbar

146, 147 Bushing 150 Latch

152 Operating parts 153 Screws

154 Gear 155 Shaft

156 Spring 158 Shell

162 Raised tooth row 160 Opening

164 Teeth 166 Stopper

168 Protrusions 170 Bevels

172 Side edge

X1, X2 direction P1, P2, P3 pivot line

Claims (23)

1. A spring drive system suitable for curtains, comprising: a shell; A plurality of rotating parts are pivotally connected with the casing and are connected to each other, so that the rotating parts can rotate relative to the casing, wherein the rotating parts include a roller, the roller and a suspension part connected and rotatable relative to the housing to wind up the suspension or extend the suspension from the drum; a spring, assembled with the casing, and the spring can urge the drum to rotate in the direction of winding up the suspension member; a latch element assembled with the housing, and the latch element can be engaged with or disengaged from one of the plurality of rotating elements to prevent or allow the rotation of the drum; and an operating part, the operating part is exposed and can be connected with the latching part, wherein when the operating part is operated, the latching part can be moved to make the latching part disengage from the one of the plurality of rotating parts snap; Wherein, the housing is also connected with a stop part, the stop part can be displaced between the blocking position and the passing position, and when the stop part is in the blocking position, it can prevent the latch member from interacting with the plurality of rotating parts The one of them is disengaged from the engagement, and when the stopper is in the passing position, the latch member is allowed to slide and disengage from engagement with the one of the plurality of rotating members, and the operating member can be operated to urge the stopper. The blocking portion is displaced from the blocking position to the passing position. 2. The spring drive system of claim 1, wherein one end of the spring is connected to the drum. 3 . The spring drive system of claim 1 , wherein the plurality of rotating elements comprises a gear, the latch element can prevent the drum from rotating when the latch element is engaged with the gear, and the latch element is coupled with the gear. 4 . Disengagement of the gears allows the drum to rotate. 4 . The spring drive system of claim 1 , wherein the plurality of rotating elements comprise a first gear and a second gear, the second gear is fixedly connected to the drum and is connected to the first gear. 5 . engaged, and the latch can be engaged with or disengaged from the first gear to prevent or allow the drum to rotate. 5 . The spring drive system of claim 4 , wherein the spring and the first gear are assembled to the housing along the same pivot axis, the first end of the spring is connected to a bushing, and the The second end of the spring is connected to the drum. 6 . The spring drive system of claim 1 , wherein the casing comprises a first casing part and a second casing part, the second casing part is fixedly connected with the first casing part and protrudes from the first casing part. 7 . On one side of the first casing, the plurality of rotating members and the spring are accommodated in the first casing, and the operating member is accommodated in the second casing. 7 . The spring drive system of claim 6 , wherein an opening is formed in the first housing portion, and the latch member is movable through the opening so as to interact with the one of the plurality of rotating members. 8 . Engage or disengage. 8 . The spring drive system of claim 6 , wherein the latch member and the operating member are slidably assembled to the second housing portion. 9 . 9 . The spring drive system of claim 1 , wherein the latch member and the operating member are slidably assembled to the housing, and the connection relationship between the latch member and the operating member makes the When the operating member moves towards the first direction, the latch member can be driven to move towards the opposite second direction so as to be disengaged from the one of the plurality of rotating members. 10 . The spring drive system of claim 1 , wherein the latch member and the operating member are slidably assembled to the housing, the housing is also pivotally connected to a gear, and the gear is connected to the housing. 11 . The latch element is engaged with and can be rotated by the operating element, whereby when the operating element is operated, the latch element can be driven to slide through the gear, so that the latch element is disengaged from the one of the plurality of rotating elements snap. 11 . The spring drive system of claim 10 , wherein the latch member is connected with a second spring, the second spring can urge the latch member to slide to the one of the plurality of rotating members. 12 . The position where one is engaged. 12 . The spring driving system of claim 11 , wherein the second spring is connected to the latch member and the operating member respectively. 13 . 13. A spring drive system suitable for curtains, comprising: a shell; a roller, connected with a suspension member and pivotally connected to the casing, the roller can rotate relative to the casing to wind up the suspension member or make the suspension member extend from the roller; a spring assembled on the casing, the spring can urge the drum to rotate in the direction of winding up the suspension member; a gear, pivotally connected to the casing and connected with the drum, so that the gear and the drum rotate in interlocking relation to the casing; a latch member assembled with the housing, the latch member can be engaged with or disengaged from the gear to prevent or allow the drum to rotate; and an operating member, the operating member is exposed and connected with the latching member, wherein when the operating member is operated, the latching member can be urged to move, so that the latching member is disengaged from the gear; Wherein, the housing is also connected with a stop portion, the stop portion can be displaced between the blocking position and the passing position, and the stop portion can prevent the latch member from disengaging the gear when it is in the blocking position , when the stopper is in the passing position, the latch member is allowed to slide and disengage from the gear, and when the operating member is operated, the stopper can be moved from the blocking position to the passing position. 14 . The spring drive system of claim 13 , wherein the drum is fixedly connected to a second gear, and the second gear is engaged with the gear. 15 . 15. The spring drive system of claim 13, wherein the housing comprises a first housing part and a second housing part, the second housing part is fixedly connected with the first housing part and protrudes from the first housing part On one side of the first casing, the roller, the spring and the gear are all accommodated in the first casing, and the operating member is accommodated in the second casing. 16 . The spring drive system of claim 15 , wherein an opening is formed in the first housing portion, and the latch member can move through the opening to engage or disengage the gear. 17 . 17. The spring drive system of claim 13, wherein the latch and the operating member are slidably assembled to the housing, and the connection between the latch and the operating member makes the When the operating member moves towards the first direction, the latch member can be driven to move towards the opposite second direction to disengage from the gear. 18. The spring drive system of claim 13, wherein the latch member and the operating member are slidably assembled to the housing, the housing is also pivotally connected to another gear, the other The gear engages with the latch and can be driven to rotate by the operating member, whereby the operating member can drive the latch to slide through the other gear when the operating member is operated, so that the latch is disengaged from the gear. 19 . The spring driving system of claim 18 , wherein the latch member is connected with a second spring, and the second spring can urge the latch member to slide to a position where it engages with the gear. 20 . 20 . The spring driving system of claim 19 , wherein the second spring is connected to the latch member and the operating member, respectively. 21 . 21. A curtain comprising: a top rail; a shelter structure, which can be suspended from the top rail; a bottom disposed at the bottom of the shielding structure; and The spring drive system according to any one of claims 1 to 20, which is installed on the bottom, and the suspension member is fixedly connected with the top rail. 22. The window covering of claim 21, wherein the screening structure comprises a plurality of slats. 23. The window covering of claim 21, wherein the screening structure comprises a honeycomb structure.

Images