Curtain and roller shutter anti-falling device thereof

Abstract

The utility model discloses a curtain and a roller shutter anti-dropping device thereof, the roller shutter anti-dropping device comprises an anti-dropping structure and a power structure, the power structure comprises a driving wheel and a shell, the driving wheel is rotatably connected to the shell, and the driving wheel is used for being meshed with a bead chain and driving the bead chain to rotate; the anti-falling structure comprises a clamping arm, the clamping arm is rotationally connected to the shell, and the clamping arm is used for enabling the bead chain to abut against the driving wheel; compared with the prior art, the clamping arm is rotationally connected to the shell, the bead chain abuts against the driving wheel, under the abutting action of the clamping arm, at least part of the bead chain is kept in the state of being engaged with the driving wheel all the time, and the problem of tooth disengagement of the bead chain is effectively solved. According to the curtain adopting the roller shutter anti-falling device, the bead chain can be prevented from being separated from the power structure, and the situation that the power structure cannot transmit power to the bead chain, so that the bead chain cannot normally drive the curtain cloth to be opened and closed, and normal use of the curtain is affected is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electric curtains, and in particular to a curtain and a curtain anti-falling device thereof. Background Art

[0002] Compared with traditional manual curtains, electric curtains are convenient and fast. There is no need to pull the curtains manually, and users can control the opening and closing of the curtains from a distance, which brings great convenience to users' lives.

[0003] Currently, the working principle of electric curtains is: the driving motor transmits power to the bead chain through the driving wheel, and the bead chain drives the curtains to open and close. However, due to the long-term tension on the bead chain, the circumference of the bead chain will become longer, the bead chain and the driving wheel will be disengaged, and the driving motor cannot transmit power to the bead chain, so the electric curtains cannot work normally. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a curtain and a rolling curtain anti-slip device thereof, which can prevent a bead chain from being disengaged from a driving wheel.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A roller blind anti-slip device comprises an anti-slip structure and a power structure, wherein the anti-slip structure comprises a clamping arm; the power structure comprises a driving wheel and a shell, wherein the driving wheel is rotatably connected to the shell, and the driving wheel is used to engage with a bead chain and drive the bead chain to rotate; wherein the clamping arm is rotatably connected to the shell, and the clamping arm is used to abut the bead chain against the driving wheel.

[0007] As one implementation manner, the number of the clamping arms is at least two, and at least two of the clamping arms are disposed on opposite sides of the driving wheel; or the number of the clamping arm is one, and the clamping arm embraces the outer side of the driving wheel.

[0008] As one embodiment, the driving wheel is provided with a plurality of slots along its circumference, and the slots are used for engaging with the bead chain.

[0009] As one embodiment, the clamping arm includes a connecting portion and a clamping portion that are connected to each other, the connecting portion is rotatably connected to the shell, and the clamping portion bends and extends in a direction close to the driving wheel.

[0010] As one of the implementation modes, the clamping portion is provided with a convex strip, the convex strip is provided on a side of the clamping portion close to the driving wheel, and the convex strip is used to abut the bead chain against the driving wheel.

[0011] As one of the implementation modes, the connection portion is provided with a boss, the boss is provided on a side of the connection portion close to the shell, the shell is provided with a rotation groove, the boss is inserted into the rotation groove and rotatably cooperates with the rotation groove.

[0012] As one implementation manner, the rotation groove is bent and extended on the shell, and the protruding column is inserted into the rotation groove and slides in the rotation groove.

[0013] As one embodiment, the anti-slip structure includes a rotating part, the shell is provided with a first mounting groove, the rotating part extends into the first mounting groove and is connected to the shell, the connecting part is provided with a second mounting groove, the connecting part is sleeved on the outer periphery of the rotating part through the second mounting groove, and rotates with the rotating part.

[0014] As one implementation manner, the anti-slip structure includes a locking member, and the locking member passes through the first mounting groove and is connected to the rotating member to fix the rotating member to the housing.

[0015] As one embodiment, the rotating member includes a rod body and a limiting portion, the rod body extends into the first mounting groove and is connected to the shell, the connecting portion is sleeved on the outer periphery of the rod body through the second mounting groove and rotatably cooperates with the rod body, the limiting portion is annularly connected to the rod body, and the limiting portion abuts against the shell.

[0016] As one of the implementation modes, a limiting groove is formed at one end of the rotating member extending out of the second installation groove, and the anti-slip structure includes a clamping member, which is inserted into the limiting groove and abuts against the connecting portion.

[0017] As one implementation manner, the connecting portion includes a rolling sleeve, and the rolling sleeve is sleeved on the outer circumference of the rotating member and is located in the second installation groove.

[0018] As one embodiment, the anti-slip structure includes an elastic member, and one side of the shell extends in a direction away from the clamping arm to form a protrusion. One end of the elastic member is elastically connected to the clamping arm, and the other end is wrapped around the protrusion. The elastic member is used to push the clamping arm to rotate in a direction close to the driving wheel.

[0019] As one implementation manner, when the clamping arm rotates away from the driving wheel, the clamping arm pushes the elastic member to move, so that the elastic member undergoes elastic deformation, and the elastic member pushes the clamping arm to rotate toward the driving wheel through the elastic deformation.

[0020] Another object of the utility model is to provide a curtain, comprising a bead chain and a rolling curtain anti-detachment device of any of the above-mentioned embodiments, wherein the bead chain is meshed with a driving wheel in the rolling curtain anti-detachment device, and the power structure in the rolling curtain anti-detachment device also includes a motor, which is electrically connected to the driving wheel and is used to drive the driving wheel to rotate.

[0021] The beneficial effects of the utility model are as follows: the embodiment of the present application provides a curtain and a roller blind anti-slip device thereof, the roller blind anti-slip device comprises an anti-slip structure and a power structure, the power structure comprises a driving wheel and a housing, the driving wheel is rotatably connected to the housing, the driving wheel is used to engage with the bead chain, and is used to drive the bead chain to rotate; the anti-slip structure comprises a clamping arm, the clamping arm is rotatably connected to the housing, the clamping arm is used to abut the bead chain against the driving wheel; compared with the prior art, the clamping arm is rotatably connected to the housing, and the bead chain is pressed against the driving wheel, under the abutting action of the clamping arm, at least part of the bead chain always remains in a state of engagement with the driving wheel, effectively solving the problem of bead chain de-teething. The curtain using this roller blind anti-slip device can prevent the bead chain from detaching from the power structure, and avoid the power structure from being unable to transmit power to the bead chain, thereby causing the bead chain to be unable to normally drive the curtain to open and close, affecting the normal use of the curtain. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram showing the structure of a curtain according to an embodiment of the utility model is shown;

[0023] Figure 2 A schematic structural diagram of a rolling curtain anti-falling device according to an embodiment of the utility model is shown;

[0024] Figure 3 A schematic structural diagram showing a power structure in a rolling curtain anti-slip device according to an embodiment of the utility model;

[0025] Figure 4 A schematic diagram of the exploded parts of a rolling curtain anti-dropping device according to an embodiment of the utility model is shown;

[0026] Figure 5 A cross-sectional schematic diagram of a rolling curtain anti-falling device according to an embodiment of the utility model is shown;

[0027] Figure 6 A schematic diagram of the bottom structure of a rolling curtain anti-falling device according to an embodiment of the utility model is shown;

[0028] Figure 7 An exploded schematic diagram showing another part of a rolling curtain anti-dropping device according to an embodiment of the utility model is shown;

[0029] Figure 8 Another cross-sectional schematic diagram of a rolling curtain anti-falling device according to an embodiment of the utility model is shown.

[0030] Reference numerals:

[0031] 1. Anti-slip structure; 2. Power structure; 3. Bead chain; 11. Clamping arm; 12. Elastic member; 13. Rotating member; 14. Clamping member; 15. Locking member; 21. Shell; 22. Driving wheel; 111. Connecting part; 112. Clamping part; 113. Boss; 114. Raised strip; 115. Second mounting groove; 116. Rolling sleeve; 131. Rod body; 132. Limiting groove; 133. Limiting part; 211. First mounting groove; 212. Raised part; 213. Rotating groove; 221. Clamping groove. DETAILED DESCRIPTION

[0032] In the present invention, the terms "disposed", "provided with", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The orientation or position relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "radial", "circumferential", etc. are based on the orientation or position relationship shown in the drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in this utility model can be understood according to specific circumstances.

[0036] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0037] See also Figure 1 An embodiment of the present application provides a curtain, including a roller curtain anti-slip device and a bead chain 3. The roller curtain anti-slip device includes an anti-slip structure 1 and a power structure 2. The power structure 2 is connected to the bead chain 3. The power structure 2 is used to provide power for the bead chain 3 to rotate. The anti-slip structure 1 is connected to the bead chain 3 and the power structure 2 respectively. The anti-slip structure 1 is used to abut the bead chain 3 against the power structure 2 to prevent the bead chain 3 from detaching from the power structure 2.

[0038] Specifically, see Figure 2 The power structure 2 includes a driving wheel 22 and a shell 21, wherein the driving wheel 22 is rotatably connected to the shell 21, and the driving wheel 22 is used to engage with the bead chain 3 and drive the bead chain 3 to rotate; the anti-slip structure 1 includes a clamping arm 11, wherein the clamping arm 11 is rotatably connected to the shell 21, and the clamping arm 11 is used to abut the bead chain 3 against the driving wheel 22.

[0039] It should be noted that the power structure 2 also includes a motor, the output end of the motor is connected to the driving wheel 22, the motor is used to drive the driving wheel 22 to rotate, and then the driving wheel 22 drives the bead chain 3 to rotate; the curtain also includes a curtain cloth, and the rotation of the bead chain 3 drives the curtain cloth to open and close, thereby realizing the opening and closing function of the electric curtain.

[0040] In one embodiment, the clamping arm 11 is rotatably connected to the housing 21, and the bead chain 3 is pressed against the driving wheel 22. When the bead chain 3 is subjected to force for a long time and its circumference becomes longer, part of the bead chain 3 in contact with the clamping arm 11 is still meshed with the driving wheel 22 under the abutment of the clamping arm 11. Therefore, the driving wheel 22 can still drive the bead chain 3 to rotate when it rotates. Compared with the prior art, the present application provides the clamping arm 11. Under the abutment of the clamping arm 11, at least part of the bead chain 3 is always in a state of meshing with the driving wheel 22, which effectively solves the problem of bead chain 3 disengaging teeth, improves the practicality of the device, and ensures the normal opening and closing function of the curtain. The curtain using this roller blind anti-slip device can prevent the bead chain 3 from detaching from the power structure 2, and avoid the power structure 2 from being unable to transmit power to the bead chain 3, thereby causing the bead chain 3 to be unable to normally drive the curtain to open and close, affecting the normal use of the curtain.

[0041] See also Figure 3The driving wheel 22 is provided with a plurality of slots 221 along its circumference, and the slots 221 are used to engage with the bead chain 3. The plurality of slots 221 can increase the range of engagement between the bead chain 3 and the driving wheel 22. The clamping arm 11 abuts the bead chain 3 against the slots 221 to prevent the bead chain 3 from being separated from the slots 221. Through the engaging effect of the slots 221, the rotation of the driving wheel 22 can drive the bead chain 3 to rotate, thereby driving the curtain to open and close.

[0042] The number of the clamping arms 11 can be at least two, and at least two clamping arms 11 are arranged on opposite sides of the driving wheel 22. At least two clamping arms 11 respectively press the bead chain 3 into the clamping slot 221, further increasing the meshing range of the bead chain 3 and the driving wheel 22, which is beneficial for the driving wheel 22 to drive the bead chain 3 to rotate and prevent the bead chain 3 from being de-toothed from the driving wheel 22.

[0043] In an alternative embodiment, the number of the clamping arm 11 can also be one, and the clamping arm 11 embraces the outer side of the driving wheel 22. If one clamping arm 11 is provided, the clamping arm 11 is circumferentially arranged along the outer side of the driving wheel 22, and the annular clamping arm 11 tightly embraces the bead chain 3 and the driving wheel 22. Such a configuration can also increase the range of engagement between the bead chain 3 and the driving wheel 22, which is conducive to the driving wheel 22 driving the bead chain 3 to rotate.

[0044] See also Figure 4 The clamping arm 11 includes a connecting portion 111 and a clamping portion 112 that are connected to each other. The connecting portion 111 is rotatably connected to the housing 21 , and the clamping portion 112 bends and extends toward a direction close to the driving wheel 22 .

[0045] In one embodiment, the clamping arm 11 is rotatably connected to the housing 21 through the connecting portion 111. This arrangement can prevent the clamping arm 11 from hindering the rotation of the bead chain 3. Specifically, the bead chain 3 is connected in series with multiple beads, and the diameters of the multiple beads may be different. Therefore, the present application rotatably connects the clamping arm 11 to the housing 21. When beads of different diameters abut against the clamping arm 11, the beads with larger diameters can push the clamping arm 11 away to prevent the clamping arm 11 from hindering the rotation of the beads, so that the bead chain 3 can rotate more smoothly during operation, solve the problem of the adaptability of the bead chain 3, and improve the practicality of the device. In addition, the clamping portion 112 of the clamping arm 11 is arranged around the outer side of the driving wheel 22, so that the clamping portion 112 is more closely fitted to the outer side of the driving wheel 22, thereby increasing the meshing range of the bead chain 3 and the driving wheel 22.

[0046] See again Figure 4 The clamping portion 112 is provided with a convex strip 114 , which is provided on a side of the clamping portion 112 close to the driving wheel 22 , and the convex strip 114 is used to abut the bead chain 3 against the driving wheel 22 .

[0047] In one embodiment, the convex strip 114 extends toward the driving wheel 22. In this way, the convex strip 114 can at least partially extend into the driving wheel 22. The convex strip 114 presses the bead chain 3 and the slot 221 tightly, thereby enhancing the connection stability between the bead chain 3 and the slot 221 and further preventing the bead chain 3 from escaping from the slot 221.

[0048] See also Figure 5 and Figure 6 The anti-slip structure 1 includes an elastic member 12. One side of the shell 21 extends in a direction away from the clamping arm 11 to form a protrusion 212. One end of the elastic member 12 is elastically connected to the clamping arm 11, and the other end is wrapped around the protrusion 212. The elastic member 12 is used to push the clamping arm 11 to rotate in a direction close to the driving wheel 22.

[0049] In one embodiment, in order to enhance the abutment effect of the clamping arm 11, the present application provides an elastic member 12, which elastically connects the clamping arm 11 and the housing 21. When the clamping arm 11 is pushed open, that is, the clamping arm 11 rotates away from the driving wheel 22, the restoring elastic force of the elastic member 12 pushes the clamping arm 11 to rotate toward the driving wheel 22, so that the bead chain 3 and the card slot 221 are pressed tightly again, thereby improving the practicality of the device. The elastic member 12 can be a torsion spring.

[0050] In some other embodiments, the clamping arm 11 may be made of an elastic material, and the elasticity of the clamping arm 11 itself may be used to push the clamping arm 11 to rotate toward the driving wheel 22 , which may also enhance the abutting effect of the clamping arm 11 .

[0051] Specifically, when the clamping arm 11 rotates away from the driving wheel 22 , the clamping arm 11 pushes the elastic member 12 to move, so that the elastic member 12 undergoes elastic deformation, and the elastic member 12 pushes the clamping arm 11 to rotate toward the driving wheel 22 through the elastic deformation.

[0052] In actual applications, one end of the elastic member 12 is connected to the clamping arm 11, and the other end is connected to the shell 21. Preferably, the elastic member 12 adopts a torsion spring. When the clamping arm 11 rotates in the direction away from the driving wheel 22, the clamping arm 11 drives the elastic member 12 to twist, causing it to undergo elastic deformation and store torsional energy. When the clamping arm 11 stops rotating, the elastic member 12 begins to release torsional energy and restores itself to an untwisted state. Therefore, the elastic member 12 generates a reverse torque, which pushes the clamping arm 11 to rotate in the direction close to the driving wheel 22, so that it again abuts the bead chain 3 against the driving wheel 22.

[0053] See also Figure 6 and Figure 7The connecting portion 111 is provided with a boss 113 , which is disposed on one side of the connecting portion 111 close to the housing 21 . The housing 21 is provided with a rotation groove 213 , and the boss 113 is inserted into the rotation groove 213 and rotates with the rotation groove 213 .

[0054] In one embodiment, the boss 113 is connected to a side of the connecting portion 111 close to the shell 21, and is rotatably matched with the rotating groove 213 on the shell 21. One end of the elastic member 12 is connected to the raised portion 212, and the other end is connected to the boss 113. When the clamping arm 11 is pushed open, the boss 113 rotates in the rotating groove 213 following the clamping arm 11, and drives the elastic member 12 to twist, so that it stores torsional energy, and the torsional energy is released by the elastic member 12 to realize the resetting function of the clamping arm 11. The boss 113 is provided at the position for connection of the elastic member 12, and the structure is simpler and the assembly is more convenient.

[0055] See again Figure 7 The rotation groove 213 is bent and extended on the housing 21, and the boss 113 is inserted into the rotation groove 213 and slides in the rotation groove 213. The rotation groove 213 is bent and extended on the housing 21 to a certain length, and the boss 113 rotates in the rotation groove 213. The rotation groove 213 of a certain length has a limiting effect on the boss 113, limiting the rotation angle of the boss 113, and preventing the boss 113 from rotating too much, thereby causing the torsion angle of the elastic member 12 to exceed its own elastic limit, causing the elastic member 12 to be permanently deformed and unable to recover, affecting the normal function of the device.

[0056] See also Figure 7 and Figure 8 The anti-slip structure 1 includes a rotating member 13, a shell 21 is provided with a first mounting groove 211, the rotating member 13 extends into the first mounting groove 211 and is connected to the shell 21, and a connecting portion 111 is provided with a second mounting groove 115. The connecting portion 111 is sleeved on the outer periphery of the rotating member 13 through the second mounting groove 115 and rotates with the rotating member 13.

[0057] In one embodiment, the rotating member 13 can be first inserted into the first installation groove 211 of the shell 21, and then the connecting portion 111 can be sleeved on the rotating member 13 to complete the rotational connection between the clamping arm 11 and the shell 21. This arrangement makes the assembly of the equipment simpler and more convenient.

[0058] The connecting portion 111 further includes a rolling sleeve 116 . The rolling sleeve 116 is sleeved on the outer circumference of the rotating member 13 and is located in the second installation groove 115 .

[0059] Specifically, the rotating member 13 is first inserted into the first installation groove 211 of the shell 21, the roller sleeve 116 is placed in the second installation groove 115, and then the roller sleeve 116 and the connecting part 111 are mounted together on the outer periphery of the rotating member 13 to complete the rotational installation of the clamping arm 11 and the shell 21; the provision of the roller sleeve 116 can reduce the wear of the clamping arm 11 when it rotates relative to the rotating member 13, thereby extending the mechanical life of the clamping arm 11.

[0060] See again Figure 8 The anti-drop structure 1 further includes a locking member 15 , which passes through the first mounting groove 211 and is connected to the rotating member 13 to fix the rotating member 13 to the housing 21 .

[0061] In one embodiment, the rotating member 13 is inserted into the first installation groove 211 from the top of the housing 21, and the locking member 15 is extended from the bottom of the housing 21 into the first installation groove 211 and connected to the rotating member 13, so that the rotating member 13 and the housing 21 are fixedly connected together, and then the connecting portion 111 is sleeved on the rotating member 13, and the connecting portion 111 can rotate relative to the rotating member 13 to achieve the rotational connection between the clamping arm 11 and the housing 21; the present application prevents the rotating member 13 from being separated from the housing 21 by setting the locking member 15, thereby preventing the clamping arm 11 from being separated from the housing 21, and strengthening the connection stability between the clamping arm 11 and the housing 21. Among them, the locking member 15 can be a screw or a rivet.

[0062] See again Figure 8 The rotating member 13 includes a rod body 131 and a limiting portion 133. The rod body 131 extends into the first mounting groove 211 and is connected to the shell 21. The connecting portion 111 is sleeved on the outer periphery of the rod body 131 through the second mounting groove 115 and rotatably cooperates with the rod body 131. The limiting portion 133 is annularly connected to the rod body 131, and the limiting portion 133 abuts against the shell 21.

[0063] In actual application, in order to further limit the axial movement of the rotating member 13 relative to the shell 21, the present application provides a limiting portion 133 on the rotating member 13, and the limiting portion 133 is circumferentially connected to the circumferential side of the rod body 131. When the rod body 131 is inserted into the first mounting groove 211, the limiting portion 133 is located above the shell 21 and abuts against the shell 21 to limit the axial downward movement of the rod body 131 relative to the shell 21. The locking member 15 extends from the bottom of the shell 21 into the first mounting groove 211 and is connected to the rotating member 13 to limit the axial upward movement of the rod body 131 relative to the shell 21. In this way, the axial movement of the rotating member 13 relative to the shell 21 is limited by the limiting portion 133 and the locking member 15, thereby preventing the rotating member 13 from being separated from the shell 21, and further preventing the clamping arm 11 from being separated from the shell 21.

[0064] One end of the rotating member 13 extending out of the second mounting slot 115 defines a limiting slot 132 . The anti-drop structure 1 includes a clamping member 14 . The clamping member 14 is inserted into the limiting slot 132 and abuts against the connecting portion 111 .

[0065] In one embodiment, an end of the rotating member 13 extending out of the second mounting groove 115 is provided with an annular limiting groove 132, and the clamping member 14 is inserted into the limiting groove 132. The clamping member 14 limits the clamping arm 11 axially to prevent the clamping arm 11 from being separated from the rotating member 13, thereby enhancing the connection stability between the clamping arm 11 and the housing 21. Preferably, the clamping member 14 can be an E-type clamp spring.

[0066] Different from the prior art, the embodiment of the present application provides a curtain and a roller blind anti-slip device thereof, the roller blind anti-slip device comprises an anti-slip structure 1 and a power structure 2, the power structure 2 comprises a driving wheel 22 and a housing 21, the driving wheel 22 is rotatably connected to the housing 21, the driving wheel 22 is used to mesh with the bead chain 3, and is used to drive the bead chain 3 to rotate; the anti-slip structure 1 comprises a clamping arm 11, the clamping arm 11 is rotatably connected to the housing 21, the clamping arm 11 is used to abut the bead chain 3 against the driving wheel 22; compared with the prior art, the clamping arm 11 is rotatably connected to the housing 21, and the bead chain 3 is tightly abutted against the driving wheel 22, under the abutting action of the clamping arm 11, at least part of the bead chain 3 always maintains a state of meshing with the driving wheel 22, effectively solving the problem of bead chain 3 de-teething. The curtain using this roller blind anti-slip device can prevent the bead chain 3 from being separated from the power structure 2, and avoid the power structure 2 from being unable to transmit power to the bead chain 3, thereby causing the bead chain 3 to be unable to normally drive the curtain to open and close, affecting the normal use of the curtain.

[0067] The above is only a specific implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A rolling shutter anti-slip device, characterized in that: include: The anti-slip structure (1) comprises a clamping arm (11); The power structure (2) comprises a driving wheel (22) and a housing (21), wherein the driving wheel (22) is rotatably connected to the housing (21), and the driving wheel (22) is used to mesh with the bead chain (3) and to drive the bead chain (3) to rotate; Wherein, the clamping arm (11) is rotatably connected to the housing (21), and the clamping arm (11) is used to abut the bead chain (3) against the driving wheel (22).

2. The rolling shutter anti-slip device according to claim 1, characterized in that: The number of the clamping arms (11) is at least two, and at least two of the clamping arms (11) are arranged on opposite sides of the driving wheel (22); or The number of the clamping arm (11) is one, and the clamping arm (11) embraces the outer side of the driving wheel (22).

3. The rolling shutter anti-slip device according to claim 1, characterized in that: The driving wheel (22) is provided with a plurality of slots (221) along its circumference, and the slots (221) are used for being engaged with the bead chain (3).

4. The rolling shutter anti-slip device according to claim 1, characterized in that: The clamping arm (11) comprises a connecting portion (111) and a clamping portion (112) which are connected to each other, the connecting portion (111) is rotatably connected to the housing (21), and the clamping portion (112) bends and extends in a direction close to the driving wheel (22).

5. The rolling shutter anti-slip device according to claim 4, characterized in that: The clamping portion (112) is provided with a convex strip (114), and the convex strip (114) is provided on a side of the clamping portion (112) close to the driving wheel (22), and the convex strip (114) is used to abut the bead chain (3) against the driving wheel (22).

6. The rolling curtain anti-slip device according to claim 4, characterized in that: The connecting portion (111) is provided with a boss (113), and the boss (113) is arranged on a side of the connecting portion (111) close to the housing (21). The housing (21) is provided with a rotation groove (213), and the boss (113) is inserted into the rotation groove (213) and rotationally cooperates with the rotation groove (213).

7. The rolling shutter anti-falling device according to claim 6, characterized in that: The rotation groove (213) is bent and extended on the housing (21), and the protruding column (113) is inserted into the rotation groove (213) and slides in the rotation groove (213).

8. The rolling curtain anti-falling device according to claim 4, characterized in that: The anti-slip structure (1) comprises a rotating member (13), the housing (21) is provided with a first mounting groove (211), the rotating member (13) extends into the first mounting groove (211) and is connected to the housing (21), the connecting portion (111) is provided with a second mounting groove (115), the connecting portion (111) is sleeved on the outer periphery of the rotating member (13) through the second mounting groove (115), and is rotatably matched with the rotating member (13).

9. The rolling curtain anti-falling device according to claim 8, characterized in that: The anti-slip structure (1) comprises a locking member (15), wherein the locking member (15) passes through the first mounting groove (211) and is connected to the rotating member (13) so as to fix the rotating member (13) to the housing (21).

10. The rolling curtain anti-falling device according to claim 8, characterized in that: The rotating member (13) comprises a rod body (131) and a limiting portion (133); the rod body (131) extends into the first mounting groove (211) and is connected to the housing (21); the connecting portion (111) is sleeved on the outer periphery of the rod body (131) through the second mounting groove (115) and is rotatably matched with the rod body (131); the limiting portion (133) is circumferentially connected to the rod body (131) and abuts against the housing (21).

11. The rolling curtain anti-falling device according to claim 8, characterized in that: A limiting groove (132) is formed at one end of the rotating member (13) extending out of the second mounting groove (115); the anti-slip structure (1) comprises a clamping member (14); the clamping member (14) is inserted into the limiting groove (132) and abuts against the connecting portion (111).

12. The rolling curtain anti-slip device according to claim 8, characterized in that: The connecting portion (111) is provided with a rolling sleeve (116), and the rolling sleeve (116) is sleeved on the outer periphery of the rotating member (13) and is located in the second installation groove (115).

13. The rolling shutter anti-falling device according to claim 1, characterized in that: The anti-slip structure (1) comprises an elastic member (12); one side of the housing (21) extends in a direction away from the clamping arm (11) to form a protrusion (212); one end of the elastic member (12) is elastically connected to the clamping arm (11), and the other end is arranged around the protrusion (212); the elastic member (12) is used to push the clamping arm (11) to rotate in a direction close to the driving wheel (22).

14. The rolling curtain anti-slip device according to claim 13, characterized in that: When the clamping arm (11) rotates in a direction away from the driving wheel (22), the clamping arm (11) pushes the elastic member (12) to move, so that the elastic member (12) undergoes elastic deformation, and the elastic member (12) pushes the clamping arm (11) to rotate in a direction close to the driving wheel (22) through the elastic deformation.

15. A curtain, characterized in that: It comprises a bead chain (3) and the roller blind anti-slipping device as described in any one of claims 1 to 14, wherein the bead chain (3) is meshed with a driving wheel (22) in the roller blind anti-slipping device, and the power structure (2) in the roller blind anti-slipping device also comprises a motor, which is electrically connected to the driving wheel (22) and is used to drive the driving wheel (22) to rotate.

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