Curtain lifting device

Abstract

The utility model discloses a curtain lifting device which comprises an upper positioning piece arranged along the top edge of a building arch structure in a matched mode and a lower positioning piece arranged on a building floor, the lower positioning piece is arranged below the upper positioning piece in an aligned mode in the vertical direction, and a curtain winding and unwinding mechanism is arranged on the lower positioning piece. A curtain matched with an arch structure of a building is arranged in the curtain winding and unwinding mechanism; the curtain lifting device further comprises a driving mechanism capable of being matched with the positioning assembly to drive the curtain to ascend and descend in a reciprocating mode. According to the curtain lifting device, the lifting and winding and unwinding operation effects of the curtain matched with the building can be optimized, so that the curtain can adapt to the spatial arrangement requirement of an arched building structure.

Description

Technical Field

[0001] The utility model relates to the technical field of building supporting roller curtain arrangement equipment, in particular to a curtain lifting device. Background Art

[0002] In the current architectural field, arched structure is a relatively common structural form in architectural structures, especially in the structural layout of ancient buildings.

[0003] In recent years, with the continuous development of the cultural industry, there has been varying degrees of demand for the display and shielding of arched building structures and layout spaces in related fields such as cultural relics protection and cultural heritage display.

[0004] Generally, this type of arched structure layout involving buildings includes, but is not limited to, arched passageways, arched doors and windows, and arched halls and rooms within the building. The corresponding types of layout operations often involve shading, projection, and art displays within the corresponding arched spaces. These layout operations often require the use of large-scale shielding materials such as roller blinds or curtains to meet the display effects and application requirements of the corresponding arched spaces in actual operations.

[0005] At present, devices such as roller blinds or curtains that can be used for technology display and space shielding are mostly only suitable for scene layouts with a flat extension at the top of the building structure space, but cannot be fully compatible with the matching layout of arched building structures and arched building apertures, which in itself will affect the layout effect of the corresponding roller blinds or curtains; on this basis, considering that the winding mechanism of the roller blind device and the curtain matching device in the existing technology is usually installed and arranged on the top of the building structure, the winding and unwinding operation process of the roller blind or curtain will further adversely affect the corresponding space display and structural layout, causing many inconveniences to the corresponding building structure space layout.

[0006] In view of this, how to optimize the lifting and retracting and rolling operations of the building's supporting curtains so that they can adapt to the spatial layout requirements of the arched building structure is an important technical problem that technical personnel in this field currently need to solve. Utility Model Content

[0007] The purpose of the utility model is to provide a curtain lifting device, which can optimize the lifting and retracting and unreeling operation effects of the curtain matched with the building, so that the curtain can adapt to the spatial layout requirements of the arched building structure.

[0008] To solve the above technical problems, the present invention provides a curtain lifting device, comprising an upper positioning member adapted to be arranged along the top edge of a building's arched structure, and a lower positioning member provided on the building's floor, the lower positioning member being vertically aligned below the upper positioning member, the lower positioning member being provided with a curtain retracting and unreeling mechanism, the curtain adapted to the building's arched structure being provided within the curtain retracting and unreeling mechanism;

[0009] The curtain lifting device further includes a driving mechanism capable of cooperating with the upper positioning member and the lower positioning member to drive the curtain to lift and lower back and forth.

[0010] Preferably, the driving mechanism includes a fixed pulley fixedly arranged at the bottom of the upper positioning member, a traction rope overlapped on the fixed pulley, and a traction retracting and unwinding mechanism fixed on the lower positioning member;

[0011] One end of the traction rope is linked to the top end of the curtain, and the other end of the traction rope is linked to the action end of the traction retracting and winding mechanism.

[0012] Preferably, the driving mechanism further includes a driving motor, and the action end of the traction and rewinding mechanism is a traction roller connected in linkage with the driving motor.

[0013] Preferably, a curtain roller shaft linked to the bottom end of the curtain is provided inside the curtain retracting and unreeling mechanism, and the curtain roller shaft is linked to the driving motor.

[0014] Preferably, the curtain retracting and unreeling mechanism and the traction retracting and unreeling mechanism are respectively arranged on both sides of the lower positioning member in the horizontal direction.

[0015] Preferably, the rotation axes of the curtain roller, the traction roller and the fixed pulley are parallel to each other.

[0016] Preferably, the drive motor is fixed on the lower positioning member, and the drive motor is located between the curtain retracting and unreeling mechanism and the traction retracting and unreeling mechanism along the horizontal direction.

[0017] Preferably, the traction rope and the curtain are linked and connected via a snap ring and can be assembled and disassembled.

[0018] Preferably, the upper positioning member is an arch bracket arranged along the top edge of the arch structure of the building.

[0019] Preferably, the lower positioning member is a support beam seat fixed on the floor of the building, and the length direction of the support beam seat is parallel to the width direction of the curtain.

[0020] Compared with the above-mentioned background technology, the curtain lifting device provided by the present invention, during its assembly and operation, the upper positioning member and the lower positioning member are arranged correspondingly at the corresponding positions of the arch structure of the building, and the curtain, the curtain retracting and unwinding mechanism and the driving mechanism are respectively installed and arranged in place. When the curtain needs to be unfolded to meet the corresponding building space shielding or building structure display, the driving mechanism can be used to drive the curtain to move upward, so that the curtain is gradually extended from the curtain retracting and unwinding mechanism and gradually unfolded until the top of the curtain moves upward to the position where it is aligned with the upper positioning member, at which time the curtain is unfolded and arranged. After the corresponding building space shielding or building structure display operation is completed, the driving mechanism drives the curtain retracting and unwinding mechanism to rewind, so that the curtain is gradually lowered and retracted into the curtain retracting and unwinding mechanism until the curtain is completely retracted into the curtain retracting and unwinding mechanism, and the corresponding arch structure space in the building is restored to its normal state. The curtain lifting device arranges the curtain retracting and unreeling supporting mechanism on the floor of the building, so that the curtain will not cause structural interference to the top space of the building during the lifting and lowering action, and there is no need to arrange the curtain retracting and unreeling mechanism and other action mechanisms at the top position of the arched structure of the building. Therefore, it is only necessary to arrange the top end of the curtain into an arched or curved outer edge structure that can adapt to the arched structure at the top of the building, which can significantly improve the adaptation effect of the curtain to the arched structure space of the building, thereby greatly optimizing the shielding or display effect of the curtain on the space and structure at the corresponding position.

[0021] In another preferred embodiment of the present invention, the drive mechanism includes a fixed pulley fixed to the bottom of the upper positioning member, a traction rope attached to the fixed pulley, and a traction and retracting mechanism fixed to the lower positioning member; one end of the traction rope is linked to the top of the curtain, and the other end of the traction rope is linked to the operating end of the traction and retracting mechanism. This pulley traction mechanism, consisting of a traction rope and a fixed pulley, has a simple and reliable structure, high operational efficiency, and good control accuracy, fully meeting the requirements for curtain deployment and arrangement operations. Specifically, when the curtain needs to be lifted and unfolded, the traction and retracting and winding mechanism is used to drive the end of the traction rope connected to the traction and retracting and winding mechanism to move downward, so that while gradually completing the reeling action of the traction rope, the traction rope and the fixed pulley are overlapped to convert the downward movement of the traction rope during the reeling process into an upward movement of the connection end of the traction rope and the curtain, thereby driving the top of the curtain to move upward synchronously, so that the curtain is gradually pulled out of the curtain retracting and winding mechanism and gradually unfolded until the top of the curtain reaches the position where it is aligned with the upper positioning piece, thereby achieving the spatial shielding or other adaptation effect of the curtain on the arched building structure at the corresponding position, meeting the corresponding shielding and display needs. When the curtain needs to be released from blocking the arched structure space at the corresponding position or other adaptation effects are required, the curtain reeling operation can be completed by simply repeating the curtain lowering and retracting action process described above. In this process, the traction and retracting mechanism no longer applies force to the traction rope, thereby enabling the traction rope to move synchronously with the reeling action of the curtain, thereby achieving reverse extension of the traction rope to compensate for the vertical arrangement space after the curtain is retracted, and maintaining the stable structural adaptation of the traction rope and the fixed pulley to prepare for the next curtain raising and unfolding operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A front view of the layout structure of a curtain lifting device provided in a specific embodiment of the present invention;

[0024] Figure 2 for Figure 1 side view.

[0025] in:

[0026] 10- curtain; 101- upper positioning member; 102- lower positioning member;

[0027] 11- curtain retracting and unreeling mechanism;

[0028] 12-fixed pulley; 121-traction rope; 122-traction reeling and unwinding mechanism; 123-drive motor; 124-clamping ring. DETAILED DESCRIPTION

[0029] The core of the utility model is to provide a curtain lifting device, which can optimize the lifting and retracting and rolling operation effects of the curtain matched with the building, so that the curtain can adapt to the spatial layout requirements of the arched building structure.

[0030] In order to enable those skilled in the art to better understand the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0031] It should be noted in advance that, in this utility model, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; they may refer to direct connection, indirect connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0032] In addition, in the present invention, unless otherwise clearly stipulated and limited, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them.

[0033] In addition, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and diagonally above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply indicates that the first feature is lower in level than the second feature. The terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0034] Please refer to Figure 1 and Figure 2 .

[0035] In a specific embodiment, the curtain lifting device provided by the present invention includes an upper positioning member 101 adaptedly arranged along the top edge of the arched structure of the building and a lower positioning member 102 arranged on the floor of the building. The lower positioning member 102 is arranged in a vertical direction below the upper positioning member 101. A curtain retracting and unwinding mechanism 11 is provided on the lower positioning member 102, and a curtain 10 adapted to the arched structure of the building is provided in the curtain retracting and unwinding mechanism 11.

[0036] The curtain lifting device further includes a driving mechanism that can cooperate with the upper positioning member and the lower positioning member to drive the curtain 10 to move up and down.

[0037] In a specific assembly application, the upper and lower positioning members 101, 102 are positioned in corresponding locations on the building's arched structure, and the curtain 10, curtain retracting and unwinding mechanism 11, and drive mechanism are installed and positioned accordingly. When the curtain 10 needs to be deployed to provide shade or display for a specific building space, the drive mechanism can be used to move the curtain 10 upward, gradually extending the curtain 10 from the curtain retracting and unwinding mechanism 11 and gradually deploying the curtain until the top end of the curtain 10 moves upward to align with the upper positioning member 101. At this point, the curtain 10 is deployed.

[0038] After the corresponding building space shielding or building structure display operation is completed, the driving mechanism drives the curtain retracting and unwinding mechanism 11 to rewind, so that the curtain 10 is gradually lowered and retracted into the curtain retracting and unwinding mechanism 11 until the curtain 10 is completely retracted into the curtain retracting and unwinding mechanism 11, and the corresponding arched structure space in the building is restored to its normal state.

[0039] The curtain lifting device arranges the retracting and unreeling mechanism of the curtain 10 on the floor of the building, so that the curtain 10 will not cause structural interference to the top space of the building during the lifting and lowering action, and there is no need to arrange the retracting and unreeling mechanism of the curtain 10 and other action mechanisms at the top position of the arched structure of the building. Therefore, it is only necessary to arrange the top end of the curtain 10 into an arched or curved outer edge structure that can adapt to the arched structure at the top of the building, which can significantly improve the adaptation effect of the curtain 10 to the arched structure space of the building, thereby greatly optimizing the shielding or display effect of the curtain 10 on the space and structure at the corresponding position.

[0040] It is readily understood that the upper positioning member 101 may be an arched bracket positioned along the top edge of the building's arched structure, and its main structure may be assembled from a plurality of rods. Since the upper positioning member 101 is configured to conform to the top edge of the building's arched structure, the top edge of the curtain 10 in this embodiment does not necessarily need to be configured as an arched or fan-shaped structure that conforms to the top edge of the building's arched structure. It is only necessary to ensure that, after the curtain 10 is raised to its highest position and unfolded, the top of the curtain 10 aligns with the upper positioning member 101, ensuring that the curtain 10 provides adequate shielding for the corresponding building's arched structure and space.

[0041] Of course, considering the structural adaptability in actual operation, the top edge of the curtain 10 is preferably arranged in an arch, fan, or arc shape that can adapt to the top edge of the arched structure of the building. In actual application, personnel can flexibly select and adjust the specific shape and structure of the curtain 10 according to specific working conditions. In principle, any shape and structure that can meet the actual application requirements of the curtain lifting device is acceptable.

[0042] Specifically, the drive mechanism includes a fixed pulley 12 fixed to the bottom of the upper positioning member 101, a traction rope 121 attached to the fixed pulley 12, and a traction and retraction mechanism 122 fixed to the lower positioning member 102. One end of the traction rope 121 is linked to the top of the curtain 10, and the other end of the traction rope 121 is linked to the operating end of the traction and retraction mechanism 122. This pulley traction mechanism, formed by the traction rope 121 and the fixed pulley 12, has a simple and reliable structure, high operational efficiency, and excellent control accuracy, fully meeting the requirements for deploying and deploying the curtain 10.

[0043] On this basis, when the curtain 10 needs to be lifted and unfolded, the traction and retracting mechanism 122 is used to drive the traction rope 121 and the end connected to the traction and retracting mechanism 122 to move downward, so that while gradually completing the reeling action of the traction rope 121, the traction rope 121 is overlapped with the fixed pulley 12 to convert the downward movement of the traction rope 121 during the reeling process into an upward movement of the connection end of the traction rope 121 and the curtain 10, thereby driving the top end of the curtain 10 to move upward synchronously, so that the curtain 10 is gradually pulled out of the curtain retracting and retracting mechanism 11 and gradually unfolded until the top end of the curtain 10 reaches the position where it is aligned with the upper positioning member 101, thereby achieving the spatial shielding or other adaptation effects of the curtain 10 on the arched building structure at the corresponding position, meeting the corresponding shielding and display needs.

[0044] When it is necessary to remove the curtain 10 from blocking the arched structure space at the corresponding position or to provide other adaptation effects, it is only necessary to repeat the above-described process of lowering and retracting the curtain 10 to complete the winding operation of the curtain 10. In this process, the traction and retracting mechanism 122 no longer applies force to the traction rope 121, thereby enabling the traction rope 121 to move synchronously with the winding action of the curtain 10, thereby achieving reverse extension of the traction rope 121, so as to compensate for the vertical arrangement space after the curtain 10 is retracted, and maintain the stable structural adaptation of the traction rope 121 to the fixed pulley 12, so as to prepare for the next curtain 10 to move up and unfold.

[0045] It should be noted that in actual applications, in order to ensure the synchronous lifting and pulling linkage of various positions of the curtain 10, a plurality of fixed pulleys 12 can be arranged at the bottom of the upper positioning member 101, and the fixed pulleys 12 can be arranged in sequence along the edge extension direction of the top of the arched structure of the building, and then matched with the traction rope 121 arranged on each fixed pulley 12 in a one-to-one correspondence, so that each position on the top of the curtain 10 can obtain uniform and sufficient lifting and pulling power during the lifting process of the curtain 10, and when the curtain 10 is lowered and wound, each position on the top can also obtain appropriate drag buffering force from the traction rope 121, thereby ensuring that both the lifting and unfolding and the lowering and winding processes of the curtain 10 can be implemented smoothly, and the force on various parts of the curtain 10 can be more balanced and reliable, thereby optimizing the control accuracy of the lifting and lowering action of the curtain 10 and the tracking performance of its unfolding and winding actions.

[0046] Furthermore, the drive mechanism also includes a drive motor 123, and the action end of the traction and rewinding mechanism 122 is a traction roller that is linked to the drive motor 123. The end of the traction rope 121 is reliably connected to the traction roller, so that the traction rope 121 and the traction roller form a linked connection structure. During the operation of the equipment, the drive motor 123 is used to drive the traction roller to rotate in the forward direction of the fixed axis, so as to drive the traction rope 121 to be gradually wound around the traction roller, thereby realizing the rewinding operation of the traction rope 121. The linkage connection between the traction rope 121 and the curtain 10 is thereby used to drive the curtain 10 to be gradually raised and unfolded. If it is necessary to unwind the traction rope 121 to cooperate with the rewinding operation of the curtain 10, it is only necessary to contact the drive connection of the drive motor 123 to the traction roller, so that the traction roller can be driven by the rewinding action of the curtain 10 and synchronously rotate in the reverse direction of the fixed axis along with the unwinding action of the traction rope 121.

[0047] Correspondingly, the curtain retracting and unwinding mechanism 11 is internally provided with a curtain roller 10 that is interlocked with the bottom end of the curtain 10. The curtain roller 10 is interlocked with the drive motor 123. Similar to the interlocking cooperation between the traction roller and the drive motor 123 described above, the curtain roller 10 can also rotate in a forward fixed axis under the drive of the drive motor 123, thereby driving the curtain 10 to be gradually wound around the curtain roller 10, completing the reeling operation of the curtain 10, and thereby driving the traction rope 121 to unwind. When the curtain 10 needs to be raised and unfolded, it is only necessary to release the interlocking connection between the drive motor 123 and the curtain roller 10. Thereafter, the curtain roller 10, driven by the reeling action of the traction rope 121, can rotate in a reverse fixed axis synchronously with the unwinding action of the curtain 10, completing the corresponding unfolding operation of the curtain 10.

[0048] It is not difficult to understand that in actual applications, in order to ensure the reliable connection and decoupling of the drive cooperation between the drive motor 123 and each traction roller and the curtain 10 roller, an inter-shaft clutch can be used as a transfer transmission device between the drive motor 123 and the traction roller, and between the drive motor 123 and the curtain 10 roller, so as to realize the on and off of the transmission connection between the drive motor 123 and the traction roller and the curtain 10 roller by controlling the on and off of the inter-shaft clutch.

[0049] On the other hand, the curtain retracting and unwinding mechanism 11 and the traction retracting and unwinding mechanism 122 are arranged horizontally on either side of the lower positioning member 102. Placing the two retracting and unwinding mechanisms on either side of the lower positioning member 102 further optimizes the structural layout of the lower positioning member 102, improves the utilization of the assembly space there, and makes the stress distribution on both sides of the lower positioning member 102 more uniform, thereby making the assembly structure of the curtain lifting device more regular and reliable.

[0050] On this basis, the rotation axes of the rollers, traction rollers, and fixed pulleys 12 of the curtain 10 are parallel to each other. This ensures that the extension direction of the main extension surface of the curtain 10 remains stable during its retraction and unreeling, preventing the curtain 10 from twisting, tangling, or non-operational winding during the retraction and unreeling process. This also prevents blockage during the unfolding and retraction of the curtain 10, making the unfolding and retraction operations of the curtain 10 smoother and more efficient.

[0051] More specifically, the drive motor 123 is fixed to the lower positioning member 102 and is located horizontally between the curtain retracting and unwinding mechanism 11 and the traction retracting and unwinding mechanism 122. This allows a single drive motor 123 to be independently connected to both the curtain retracting and unwinding mechanism 11 and the traction retracting and unwinding mechanism 122 by simply arranging a matching coupling mechanism, such as an inter-axial clutch, on the corresponding sides of the drive motor 123. This further reduces the number of components in the curtain lifting device, optimizes the assembly layout, and makes the overall structure of the device more compact and regular.

[0052] Furthermore, the traction rope 121 and the curtain 10 are linked and easily assembled and disassembled via a clasp 124. The clasp 124 has a simple and reliable structure and is well-compatible with the traction rope 121. Simply wrapping and securing the end of the traction rope 121 around the clasp 124 completes the linked connection between the clasp 124 and the traction rope 121. If the clasp 124 or traction rope 121 requires replacement or repair, simply unfastening the traction rope 121 from the clasp 124 allows for easy removal, further enhancing the ease of use and operational efficiency of the curtain lifting device.

[0053] In addition, the lower positioning member 102 is a support beam fixed to the building floor, and the length direction of the support beam is parallel to the width direction of the curtain 10. The support beam has high structural stability and can provide reliable structural support and sufficient assembly space for various supporting assembly components such as the retracting and unreeling mechanisms.

[0054] In practical applications, the support beam seat can also be arranged in a strip groove on the building floor to prevent the protruding structure of the support beam seat from interfering with the movement of people and the arrangement of equipment on the building floor, thereby further optimizing the assembly structure layout of the curtain lifting device and improving its adaptability to working conditions.

[0055] In summary, the curtain lifting device provided in the present invention, during its assembly and operation, the upper positioning member and the lower positioning member are arranged correspondingly at the corresponding positions of the arch structure of the building, and the curtain, the curtain retracting and unwinding mechanism and the driving mechanism are installed and arranged in place respectively. When the curtain needs to be unfolded to meet the corresponding building space shielding or building structure display, the driving mechanism can be used to drive the curtain to move upward, so that the curtain is gradually extended from the curtain retracting and unwinding mechanism and gradually unfolded, until the top of the curtain moves upward to the position where it is aligned with the upper positioning member, at which time the curtain is unfolded. After the corresponding building space shielding or building structure display operation is completed, the driving mechanism drives the curtain retracting and unwinding mechanism to rewind, so that the curtain is gradually lowered and retracted into the curtain retracting and unwinding mechanism, until the curtain is completely retracted into the curtain retracting and unwinding mechanism, and the corresponding arch structure space in the building is restored to its normal state. The curtain lifting device arranges the curtain retracting and unreeling supporting mechanism on the floor of the building, so that the curtain will not cause structural interference to the top space of the building during the lifting and lowering action, and there is no need to arrange the curtain retracting and unreeling mechanism and other action mechanisms at the top position of the arched structure of the building. Therefore, it is only necessary to arrange the top end of the curtain into an arched or curved outer edge structure that can adapt to the arched structure at the top of the building, which can significantly improve the adaptation effect of the curtain to the arched structure space of the building, thereby greatly optimizing the shielding or display effect of the curtain on the space and structure at the corresponding position.

[0056] The above describes in detail the curtain lifting device provided by the present invention. This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above examples is intended only to facilitate understanding of the method and core concept of the present invention. It should be noted that those skilled in the art may make various improvements and modifications to the present invention without departing from the principles of the present invention, and such improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A curtain lifting device, characterized in that: The invention comprises an upper positioning member arranged along the top edge of the arched structure of the building and a lower positioning member arranged on the floor of the building, wherein the lower positioning member is arranged below the upper positioning member in a vertical direction, and a curtain retracting and unreeling mechanism is provided on the lower positioning member, wherein the curtain retracting and unreeling mechanism is provided with a curtain adapted to the arched structure of the building; The curtain lifting device further includes a driving mechanism capable of cooperating with the upper positioning member and the lower positioning member to drive the curtain to lift and lower back and forth.

2. The curtain lifting device according to claim 1, wherein: The driving mechanism includes a fixed pulley fixedly arranged at the bottom of the upper positioning member, a traction rope overlapped on the fixed pulley, and a traction reeling mechanism fixed on the lower positioning member; One end of the traction rope is linked to the top end of the curtain, and the other end of the traction rope is linked to the action end of the traction retracting and winding mechanism.

3. The curtain lifting device according to claim 2, wherein: The driving mechanism further includes a driving motor, and the action end of the traction and rewinding mechanism is a traction roller connected in linkage with the driving motor.

4. The curtain lifting device according to claim 3, wherein: A curtain roller shaft linked to the bottom end of the curtain is provided inside the curtain retracting and unreeling mechanism, and the curtain roller shaft is linked to the driving motor.

5. The curtain lifting device according to claim 4, wherein: The curtain retracting and unreeling mechanism and the traction retracting and unreeling mechanism are respectively arranged on both sides of the lower positioning member in the horizontal direction.

6. The curtain lifting device according to claim 5, wherein: The rotation axes of the curtain roller, the traction roller and the fixed pulley are parallel to each other.

7. The curtain lifting device according to claim 5, wherein: The driving motor is fixed on the lower positioning member, and the driving motor is located between the curtain retracting and unreeling mechanism and the traction retracting and unreeling mechanism along the horizontal direction.

8. The curtain lifting device according to claim 2, wherein: The traction rope and the curtain are linked and connected via a snap ring and can be assembled and disassembled.

9. The curtain lifting device according to claim 1, wherein: The upper positioning member is an arched bracket arranged along the top edge of the arched structure of the building.

10. The curtain lifting device according to claim 1, wherein: The lower positioning member is a support beam seat fixed on the floor of the building, and the length direction of the support beam seat is parallel to the width direction of the curtain.

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