Curtain drive device
By adding a damping mechanism to the curtain drive unit, and utilizing a unidirectional rotary transmission component and damping assembly, the problem of rebound when the curtain descends is solved, achieving smooth lifting and lowering of the curtain and reducing costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG LEAFY WINDOWARE CO LTD
- Filing Date
- 2025-07-09
- Publication Date
- 2026-06-26
AI Technical Summary
Existing curtain drive devices cause the spring motor to pull upwards when the curtain is lowered to a lower position, as the upward force is greater than the weight of the curtain, causing the curtain to rebound and rise. Furthermore, adding counterweights requires a more powerful spring motor, which is costly and requires high precision in adjustment.
A damping mechanism is added to the curtain drive device, including a one-way rotary transmission component and a damping assembly. It provides motion resistance only when the curtain is pulled down, working with the spring motor to resist the curtain's downward force. When the curtain is raised, the one-way rotary transmission component does not function, thus avoiding affecting the normal raising.
With the help of the damping mechanism, a lower power spring motor can be used to achieve smooth raising and lowering of the curtain, without the need to add counterweights, thus reducing costs and the weight of the curtain.
Smart Images
Figure CN224413506U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of curtain technology, and in particular to a curtain driving device. Background Technology
[0002] Existing curtain drive mechanisms include a spring motor for providing driving force, an actuator for driving the curtain to rise and fall accordingly, and a drive shaft connecting the spring motor and the actuator to transmit power. The actuator varies depending on the type of curtain. For example, in honeycomb blinds, Venetian blinds, or Roman blinds, the actuator includes a coiled cord sleeved on and circumferentially fixed to the drive shaft, and a carrying cord with one end wound around the coiled cord and the other end connected to the curtain. In roller blinds, the actuator is a transmission mechanism whose output end is circumferentially fixed to the coiled cord around which the curtain is wound, and which, driven by the spring motor, rotates the coiled cord accordingly.
[0003] In actual operation of raising and lowering the curtains, when the user pulls down the lower beam of the curtain to lower it, the planar spiral spring of the spring motor will coil in the opposite direction to accumulate elastic potential energy. After the curtain is lowered to any height within the range of the lifting stroke, even if the user releases the hand, the pulling force provided by the spring motor is balanced with the weight of the curtain, so that the curtain will stay at the corresponding height position and will not rise or fall arbitrarily. When it is necessary to raise the curtain, the user only needs to lift the lower beam slightly to break the original force balance. The spring motor will then continuously output pulling force to drive the actuator and make the curtain continue to rise. During the rise of the curtain, the user does not need to apply any force. When the lower beam rises to the target height, the user only needs to apply downward pulling force to the lower beam to stop the curtain again and restore the force balance.
[0004] However, during implementation, the inventors discovered that in the existing curtain drive devices, when the curtain descends to a relatively low position, the upward pulling force output by the spring motor is greater than the weight of the curtain, causing the curtain to tend to rise. When the user releases their grip, the curtain is prone to rebounding. To address this, a counterweight is usually added to the bottom of the curtain for balance, ensuring that the curtain can stop smoothly at a relatively low position. However, since the pulling force required increases as the curtain rises, the required pulling force is even greater after adding the counterweight. This necessitates the use of a spring motor with a larger output pulling force, resulting in higher costs. Furthermore, the matching and adjustment precision requirements between the spring motor's output pulling force and the counterweight are high, easily leading to a vicious cycle where the spring motor's output pulling force is too large, requiring the addition of a counterweight, which in turn increases the overall weight of the curtain, necessitating the use of a spring motor with an even larger output pulling force. Utility Model Content
[0005] The technical problem to be solved by this utility model embodiment is to provide a curtain driving device that can effectively cooperate with a spring motor to output a pulling force that is compatible with the curtain body, thereby ensuring that the curtain body rises and falls smoothly.
[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a curtain driving device, comprising:
[0007] A spring motor fixed to the top beam of the curtain;
[0008] An actuator used to drive the curtain to rise and fall accordingly;
[0009] A drive shaft that transmits power between the spring motor and the actuator; and
[0010] The damping mechanism includes:
[0011] A one-way rotary transmission member is connected to the transmission shaft at its input end, and the one-way rotary transmission member is configured to drive the output end of the one-way rotary transmission member to move synchronously only when the curtain is pulled down.
[0012] A bushing, connected to the output end of the unidirectional rotary transmission component, moves synchronously in one direction with the output end of the unidirectional rotary transmission component; and
[0013] A damping component, connected to the bushing, provides motion resistance as the bushing moves with the output end of the unidirectional rotary transmission.
[0014] Furthermore, the unidirectional rotary transmission component is a unidirectional bearing or a ratchet assembly.
[0015] Furthermore, the damping component includes:
[0016] A sleeve, fixed to the upper beam and coaxially arranged with the bushing; and
[0017] A torsion spring is disposed inside the sleeve and its outer side wall abuts against the inner wall of the sleeve. One end of the torsion spring extends radially toward the axis to form a first torsion arm.
[0018] One end of the bushing protrudes to form a push block, which is inserted into the interior of the torsion spring and abuts the first torsion arm on one side in the circumferential direction. When the bushing rotates, the push block pushes against the first torsion arm, causing the torsion spring to rotate synchronously with the bushing and form sliding friction with the sleeve.
[0019] Furthermore, the other end of the torsion spring also extends radially toward the axis to form a second torsion arm. The second torsion arm is offset from the first torsion arm in the circumferential direction and respectively corresponds to the opposite two sides of the push block in the circumferential direction.
[0020] Furthermore, the damping assembly also includes a decorative element, which includes a ring body and an insert extending axially from one end of the ring body and having an arc-shaped cross-section. The insert is inserted into the interior of the torsion spring and is arranged cocircularly with the push block. The first torsion arm and the second torsion arm are respectively located in the mating seam on opposite sides of the push block and the insert.
[0021] Furthermore, the damping component includes:
[0022] A sleeve, fixed to the upper beam and correspondingly coaxially fitted onto the outside of the bushing; and
[0023] A brake ring is embedded in the sleeve and its outer side wall is in close contact with the inner wall of the sleeve. The brake ring also has an abutment portion.
[0024] One end of the bushing protrudes to form a push block, which abuts against the abutting part of the brake ring. When the bushing rotates, the push block pushes against the brake ring, causing the brake ring to slide and rub against the sleeve.
[0025] Furthermore, the brake ring is a C-shaped ring with an opening on one side, the circumferential sidewall of the opening forming the abutment portion, and the push block is inserted into the opening accordingly; or, the brake ring is a closed ring body with a slot formed at a predetermined position, the circumferential sidewall of the slot forming the abutment portion, and the push block is inserted into the slot accordingly.
[0026] Furthermore, the damping mechanism also includes a core tube, which is sleeved on the transmission shaft and fixed relative to the transmission shaft in the circumferential direction. The core tube is also connected to the input end of the unidirectional rotary transmission component to drive the input end of the unidirectional rotary transmission component to rotate synchronously.
[0027] Furthermore, the damping mechanism also includes a housing, the sleeve is integrally connected to the housing, and the core tube, unidirectional rotation transmission component, bushing and other components of the damping assembly are all located inside the housing.
[0028] Furthermore, the curtain drive device is provided with two sets of damping mechanisms, wherein the two sets of damping mechanisms are arranged side by side and their housings are connected as one unit.
[0029] After adopting the above technical solution, the present utility model embodiment has at least the following beneficial effects: This embodiment adds a damping mechanism, and the damping mechanism is equipped with a one-way rotation transmission component to drive the transmission shaft. When the curtain is pulled down by the user, the damping component in the damping mechanism can provide motion resistance. Thus, the damping mechanism, together with the spring motor, acts on the transmission shaft to resist the force that causes the curtain to descend. When the curtain rises, due to the one-way rotation transmission component, the damping mechanism will not function and will not affect the normal rise of the curtain. Therefore, a spring motor with a relatively small output pulling force can be selected, and there is no need to add additional counterweights to the curtain, which is beneficial to reduce the weight of the curtain and effectively reduce costs. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the structure of the curtain drive device of this utility model installed on a curtain in an optional embodiment.
[0031] Figure 2 This is a schematic diagram of the damping mechanism in a disassembled state, representing an optional embodiment of the curtain drive device of this utility model.
[0032] Figure 3 This is a schematic diagram of the damping mechanism in a disassembled state, representing an optional embodiment of the curtain drive device of this utility model.
[0033] Figure 4 This is a schematic diagram of the damping mechanism of an optional embodiment of the curtain drive device of this utility model when the outer casing is disassembled.
[0034] Figure 5 This is a cross-sectional view along a plane perpendicular to the central axis of the drive shaft, representing an optional embodiment of the curtain drive device of this utility model.
[0035] Figure 6 This is a cross-sectional view along a plane passing through the central axis of the drive shaft, representing an optional embodiment of the curtain drive device of this utility model.
[0036] Figure 7 This is a cross-sectional view along a plane perpendicular to the central axis of the drive shaft, representing another optional embodiment of the curtain drive device of this utility model.
[0037] Figure 8 This is a cross-sectional view along a plane perpendicular to the central axis of the transmission shaft, representing another optional embodiment of the curtain drive device of this utility model.
[0038] Figure 9 This is a schematic diagram of the structure of the curtain drive device of this utility model installed on a curtain in another optional embodiment.
[0039] Figure 10This is a three-dimensional schematic diagram of the damping mechanism used in another optional embodiment of the curtain drive device of this utility model.
[0040] Figure 11 This is a structural diagram showing the disassembled state of the damping mechanism used in another optional embodiment of the curtain drive device of this utility model. Detailed Implementation
[0041] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the following illustrative embodiments and descriptions are only used to explain the present invention and are not intended to limit the present invention. Moreover, the embodiments and features in the embodiments of the present invention can be combined with each other unless otherwise specified.
[0042] like Figures 1-11 As shown, an optional embodiment of this utility model provides a curtain driving device, comprising:
[0043] Spring motor 2 is fixed to the upper beam 1 of the curtain;
[0044] The actuator 4 is used to drive the curtain 3 to rise and fall accordingly;
[0045] The drive shaft 6 that transmits power between the spring motor 2 and the actuator 4; and
[0046] Damping mechanism 8, the damping mechanism 8 comprising:
[0047] A one-way rotary transmission member 82 is connected to the transmission shaft 6 via an input end 820. The one-way rotary transmission member 82 is configured to drive the output end 822 to move synchronously only when the curtain 3 is pulled down.
[0048] Bushing 84 is connected to the output end 822 of the unidirectional rotary transmission member 82 and moves synchronously in one direction with the output end 822 of the unidirectional rotary transmission member 82; and
[0049] The damping component 86 is connected to the bushing 84 and provides motion resistance as the bushing 84 moves with the output end 822 of the unidirectional rotary transmission member 82.
[0050] The working principle of the curtain drive device provided in this embodiment of the present invention is roughly as follows: When the user pulls down the curtain body 3, the actuator 3 will feed back the pulling force to the transmission shaft 6, causing the transmission shaft 6 to rotate accordingly (for ease of description, ...). Figure 5(The angle shown is for example; assuming clockwise rotation at this time), the drive shaft 6 will drive the spring motor 2 in the reverse direction, causing the planar spiral spring inside the spring motor 2 to coil in the reverse direction and accumulate elastic potential energy. Moreover, the drive shaft 6 will further drive the bushing 84 to rotate through the one-way rotational transmission component 82. At this time, the damping component 86 will generate appropriate motion resistance to impede the movement of the bushing 84. This motion resistance is fed back to the drive shaft 6 through the one-way rotational transmission component 82, and together with the spring motor 2, it acts on the drive shaft 6 to resist the force that causes the curtain 3 to descend. When the curtain 3 needs to be raised, the user only needs to gently lift the bottom of the curtain 3 upwards. After the original force balance is broken, the spring motor 2 releases the stored elastic potential energy to drive the transmission shaft 6 to rotate counterclockwise. At this time, since the unidirectional rotation transmission component 82 cannot transmit power to its output end 822, it will not drive the bushing 84 to rotate. The damping component 86 will not work and will not affect the normal rotation of the transmission shaft 6, ensuring that the curtain 3 can continue to rise smoothly under the drive of the spring motor 2.
[0051] This embodiment adds a damping mechanism 8, and the damping mechanism 8 has a unidirectional rotational transmission component 82 inside it connected to the transmission shaft 6. When the curtain 3 is pulled down by the user, the damping component 86 in the damping mechanism 8 provides resistance to movement. Thus, the damping mechanism 8, together with the spring motor 2, acts on the transmission shaft 6 to resist the force that causes the curtain 3 to descend. When the curtain 3 rises, due to the unidirectional rotational transmission component 82, the damping mechanism 86 will not function and will not affect the normal rise of the curtain 3. Therefore, a spring motor 2 with a relatively small output pulling force can be selected, and there is no need to add additional counterweights to the curtain 3, which helps to reduce the weight of the curtain 3 and effectively reduce costs. The curtain drive device provided by this embodiment can be widely used in various types of curtains that use spring motors to drive the curtain to rise and fall, such as Roman blinds, honeycomb blinds, Venetian blinds, roller blinds, etc.
[0052] In specific implementation, in order to achieve circumferential fixation between the bushing 84 and the output end 822 of the unidirectional rotary transmission component 82, the bushing 84 can be sleeved on the outside of the output end 822, and an axial protrusion 841 is formed on the inner wall of the bushing 84. Correspondingly, an axial groove 8221 is formed on the outer wall of the output end 822 for the axial protrusion on the bushing 84 to be inserted into, thereby fixing the bushing 84 and the output end 822 relative to each other in the circumferential direction.
[0053] In one optional embodiment of this utility model, such as Figure 2 , Figure 6 and Figure 11As shown, the unidirectional rotary transmission component 82 is a unidirectional bearing. Alternatively, a ratchet assembly or other components capable of unidirectional transmission can also be used as the unidirectional rotary transmission component 82. By providing various components capable of unidirectional transmission as the unidirectional rotary transmission component 82, flexible selection is possible during specific implementation.
[0054] In one optional embodiment of this utility model, such as Figures 2 to 6 As shown, the damping component 86 includes:
[0055] Sleeve 860, fixed to the upper beam 1 and coaxially arranged with the bushing 84; and
[0056] A torsion spring 862 is disposed inside the sleeve 860 and its outer side wall abuts against the inner wall of the sleeve 860. One end of the torsion spring 862 extends radially toward the axis to form a first torsion arm 8620.
[0057] One end of the bushing 84 protrudes to form a push block 840. The push block 840 is inserted into the interior of the torsion spring 862 and is adjacent to the first torsion arm 8620 on one side in the circumferential direction. When the bushing 84 rotates, the push block 840 pushes against the first torsion arm 8620, causing the torsion spring 862 to rotate synchronously with the bushing 84 and form sliding friction with the sleeve 860.
[0058] This embodiment provides a specific structural form of the damping component 86. The bushing 84's push block 840 pushes against the first torsion arm 8620 of the torsion spring 862 assembled inside the sleeve 860, causing the torsion spring 862 to rotate. The torsion spring 862 and the sleeve 860 slide relative to each other, and the resulting frictional resistance serves as the motion resistance. The overall structure is simple. Furthermore, during operation, when the push block 840 pushes against the first torsion arm 8620, the portion of the torsion spring 862 adjacent to the first torsion arm 8620 appropriately contracts radially, thereby reducing the static friction between the torsion spring 862 and the sleeve 860, which is beneficial for the torsion spring 862 to rotate and slide relative to the sleeve 860.
[0059] In one optional embodiment of this utility model, such as Figures 2 to 5 and Figure 11As shown, the other end of the torsion spring 862 also extends radially toward the axis to form a second torsion arm 8622. The second torsion arm 8622 and the first torsion arm 8620 are offset in the circumferential direction and respectively correspond to the opposite sides of the push block 840 in the circumferential direction. In this embodiment, by forming a second torsion arm 8622 at the other end of the torsion spring 862, and the second torsion arm 8622 and the first torsion arm 8620 respectively corresponding to the opposite sides of the push block 840 in the circumferential direction, regardless of which direction the bushing 84 rotates, the push block 840 can push against the first torsion arm 8620 or the second torsion arm 8622 on the corresponding side, thereby driving the torsion spring 862 to rotate. This improves the structural compatibility of the damping assembly 86, eliminates the need to specifically identify the rotation direction of the bushing 84 during assembly, facilitates quick installation, and avoids the risk that improper installation will cause the damping mechanism 8 to fail to achieve the expected effect.
[0060] In one optional embodiment of this utility model, such as Figures 2 to 6 As shown, the damping assembly 86 further includes a decorative element 864. The decorative element 864 includes a ring 8640 and an insert 8642 extending axially from one end of the ring 8640 and having an arc-shaped cross-section. The insert 8642 is inserted into the interior of the torsion spring 862 and is cocircularly arranged with the push block 840. The first torsion arm 8620 and the second torsion arm 8622 are respectively located in the mating seams on opposite sides of the push block 840 and the insert 8642. In this embodiment, by further adding the decorative element 864, the empty space inside the torsion spring 862 can be effectively filled. On the one hand, this makes the overall structure of the damping assembly 86 more aesthetically pleasing; on the other hand, it can prevent other foreign objects from falling into the interior of the torsion spring 862 and affecting its normal rotation.
[0061] In another optional embodiment of this utility model, such as Figure 7 and Figure 8 As shown, the damping component 86 includes:
[0062] Sleeve 860, fixed to the upper beam 1 and correspondingly coaxially sleeved on the outside of bushing 84; and
[0063] Brake ring 866 is embedded in sleeve 860 and its outer side wall is in close contact with the inner wall of sleeve 860. Brake ring 866 also has an abutment portion 8660.
[0064] One end of the bushing 84 protrudes to form a push block 840, which abuts against the abutting part 8660 of the brake ring 866. When the bushing 84 rotates, the push block 840 pushes against the brake ring 866, causing the brake ring 866 to slide and rub against the bushing 84.
[0065] This embodiment provides another specific structural form of the damping component 86, compared to Figures 2 to 6 In the illustrated embodiment, the torsion spring 862 in the original embodiment is replaced by the brake ring 866. When the brake ring 866 rotates under the drive of the bushing 84, the outer wall of the brake ring 866 slides and rubs against the inner wall of the sleeve 860, thus providing resistance to movement. In actual implementation, to improve the wear resistance of the structure, the brake ring 866 and the sleeve 860 can be made of metal or relatively wear-resistant materials.
[0066] In such Figure 7 In one optional embodiment shown, the brake ring 866 is a C-shaped ring with an opening on one side, the circumferential sidewall of the opening forming the abutment portion 8660, and the push block 840 is correspondingly inserted into the opening; while in... Figure 8 In one optional embodiment, the brake ring 866 is a closed ring with a slot formed at a predetermined position. The circumferential sidewall of the slot constitutes the abutment portion 8660, and the push block 840 is inserted into the slot accordingly. This embodiment provides two different structural forms of brake rings 866, both of which can achieve the technical effect of providing motion resistance through sliding friction with the sleeve 860, facilitating flexible selection in practical applications.
[0067] In one optional embodiment of this utility model, such as Figures 2 to 8 As shown, the damping mechanism 8 further includes a core tube 88, which is sleeved on the transmission shaft 6 and fixed relative to the transmission shaft 6 in the circumferential direction. The core tube 88 is also connected to the input end 820 of the one-way rotary transmission component 82, thereby driving the input end 820 of the one-way rotary transmission component 820 to rotate synchronously. In this embodiment, by further adding the core tube 88, only the core tube 88 needs to be adapted structurally set, which can well realize the transmission connection between the input end 820 of the one-way rotary transmission component 82 and the transmission shaft 6. This facilitates the direct purchase and use of readily available one-way rotary transmission components 82 (such as one-way bearings, ratchet assemblies, etc.) and transmission shafts 6 on the market, which helps to reduce costs. In specific implementation, the circumferential fixing method between the core tube 88 and the transmission shaft 6 can be that a corresponding rib 880 is formed on the inner wall of the core tube 88 to be inserted into the positioning groove 60 on the outer peripheral wall of the transmission shaft 6, or a part of the inner wall of the core tube 88 is an axially extending plane, and the outer peripheral wall of the transmission shaft also has a corresponding plane, so that the two planes are aligned and fitted together.
[0068] In one optional embodiment of this utility model, such as Figures 1 to 11As shown, the damping mechanism 8 also includes a housing 89, and the sleeve 860 is integrally connected to the housing 89. The core tube 88, the one-way rotation transmission component 82, the bushing 84, and the remaining components of the damping assembly 86 are all located inside the housing 89. In this embodiment, by providing a housing 89, the various moving components of the damping mechanism 8 can be effectively shielded, preventing foreign objects from getting stuck. It also facilitates axial upper limit positioning of each component, improving structural reliability. Furthermore, it facilitates the engagement of the slot 891 formed on the housing 89 with the corresponding locking block 11 formed on the upper beam 1, thus securing the damping mechanism 8 onto the upper beam 1 without rotation (e.g., ...). Figure 1 , Figure 5 , Figures 7 to 9 (As shown). In a specific implementation, the outer shell 89 can be composed of a main shell 890 and an end cap 892, while the sleeve 860 can be integrally formed with the main shell 890, and the sleeve 860 can be as follows: Figures 2 to 6 , Figure 10 and Figure 11 As shown, part of the sleeve 860 is located inside the main housing 890 and part is located outside the main housing 890, or the sleeve 860 may be entirely located inside the main housing 890.
[0069] In one optional embodiment of this utility model, such as Figures 9 to 11 As shown, the curtain drive device has two sets of damping mechanisms 8, which are arranged side by side and their housings 89 are connected as one unit. In this embodiment, to adapt to different curtain types and for application scenarios requiring separate driving of different parts of the curtain body 3 for raising and lowering, for example… Figure 9 As shown, the curtain body 3 is divided into upper and lower sections, which need to be controlled to lift and lower separately. The curtain drive device will have two sets of spring motors 2, at least two sets of actuators 4, two transmission shafts 6 and two sets of damping mechanisms 8. The two sets of damping mechanisms 8 are arranged side by side and their outer shells 89 are connected as one unit, which is conducive to modularization and facilitates structural design and assembly.
[0070] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many variations under the guidance of the present invention without departing from the inventive spirit and scope of protection of the claims. These variations are all within the protection scope of the present invention.
Claims
1. A curtain driving device, comprising: The curtain drive device comprises a spring motor fixed to the upper beam of the curtain, an actuator for driving the curtain to rise and fall accordingly, and a transmission shaft for transmitting power between the spring motor and the actuator. The curtain drive device further includes a damping mechanism, which comprises: A one-way rotary transmission member is connected to the transmission shaft at its input end, and the one-way rotary transmission member is configured to drive the output end of the one-way rotary transmission member to move synchronously only when the curtain is pulled down. A bushing, connected to the output end of the unidirectional rotary transmission component, moves synchronously in one direction with the output end of the unidirectional rotary transmission component; and A damping component, connected to the bushing, provides motion resistance as the bushing moves with the output end of the unidirectional rotary transmission.
2. The curtain driving device as described in claim 1, characterized in that, The unidirectional rotary transmission component is a unidirectional bearing or a ratchet assembly.
3. The curtain driving device as described in claim 1, characterized in that, The damping component includes: A sleeve, fixed to the upper beam and coaxially arranged with the bushing; and A torsion spring is disposed inside the sleeve and its outer side wall abuts against the inner wall of the sleeve. One end of the torsion spring extends radially toward the axis to form a first torsion arm. One end of the bushing protrudes to form a push block, which is inserted into the interior of the torsion spring and abuts the first torsion arm on one side in the circumferential direction. When the bushing rotates, the push block pushes against the first torsion arm, causing the torsion spring to rotate synchronously with the bushing and form sliding friction with the sleeve.
4. The curtain driving device as described in claim 3, characterized in that, The other end of the torsion spring also extends radially toward the axis to form a second torsion arm. The second torsion arm is offset from the first torsion arm in the circumferential direction and respectively corresponds to the opposite two sides of the push block in the circumferential direction.
5. The curtain driving device as described in claim 4, characterized in that, The damping assembly also includes a decorative element, which includes a ring and an insert extending axially from one end of the ring and having an arc-shaped cross-section. The insert is inserted into the interior of the torsion spring and is arranged cocircularly with the push block. The first torsion arm and the second torsion arm are respectively located in the mating seam on opposite sides of the push block and the insert.
6. The curtain driving device as described in claim 1, characterized in that, The damping component includes: A sleeve, fixed to the upper beam and correspondingly coaxially fitted onto the outside of the bushing; and A brake ring is embedded in the sleeve and its outer side wall is in close contact with the inner wall of the sleeve. The brake ring also has an abutment portion. One end of the bushing protrudes to form a push block, which abuts against the abutting part of the brake ring. When the bushing rotates, the push block pushes against the brake ring, causing the brake ring to slide and rub against the sleeve.
7. The curtain driving device as described in claim 6, characterized in that, The brake ring is a C-shaped ring with an opening on one side, the circumferential sidewall of the opening forming the abutment portion, and the push block is inserted into the opening accordingly; or, the brake ring is a closed ring body with a slot formed at a predetermined position, the circumferential sidewall of the slot forming the abutment portion, and the push block is inserted into the slot accordingly.
8. The curtain drive device as described in claim 3 or 6, characterized in that, The damping mechanism also includes a core tube, which is sleeved on the transmission shaft and fixed relative to the transmission shaft in the circumferential direction. The core tube is also connected to the input end of the unidirectional rotary transmission component to drive the input end of the unidirectional rotary transmission component to rotate synchronously.
9. The curtain driving device as described in claim 8, characterized in that, The damping mechanism also includes a housing, the sleeve is integrally connected to the housing, and the core tube, unidirectional rotation transmission component, bushing and other components of the damping assembly are all located inside the housing.
10. The curtain driving device as described in claim 9, characterized in that, The curtain drive device is equipped with two sets of damping mechanisms, which are arranged side by side and their housings are connected as one unit.