Curtain dragging device

Abstract

The utility model discloses a curtain dragging device, which can be hung below a curtain guide rail, and comprises a shell, an upper end of which is provided with a driving opening; the driving device comprises a driving wheel and a motor assembly, the driving wheel is arranged at the driving opening in the shell, the driving wheel partially protrudes out of the shell through the driving opening and can abut against the lower bottom face of the curtain guide rail, and the motor assembly is installed in the shell and can drive the driving wheel to rotate in the driving opening so as to drive the shell to move along the lower bottom face of the curtain guide rail; the hanging assemblies are arranged on the two sides of the driving opening respectively, each hanging assembly comprises a hook piece capable of being hung below a curtain guide rail, a screw piece arranged in the shell and a knob, the lower end of each hook piece is connected with the corresponding screw piece, the knob is connected with the corresponding screw piece, and the knob of each hanging assembly can rotate to drive the corresponding screw piece to stretch out and draw back. Adjustment of the two sets of hanging assemblies does not interfere with each other, and the two hook pieces can be hung on curtain connecting pieces at different heights so as to adapt to the curtain connecting pieces at different heights or hanging postures.

Description

Technical Field

[0001] The utility model relates to the field of intelligent home appliances, in particular to a curtain dragging device. Background Art

[0002] The curtain dragging device is an electronic device that is suspended on the curtain rail and can be remotely controlled to move and drag the curtain along the rail to open and close. The prior art (China Publication No. CN218186256U) provides a curtain opener and closer, including a shell, a driving wheel, a suspension member and an adjustment assembly. The shell includes a base body and an end connected to the base body. The driving wheel is arranged at the end shell body and is used to fit with the rail for hanging the curtain. The driving wheel is used to be driven to rotate relative to the end of the shell body to realize the movement of the curtain opener and closer along the rail; the suspension members are arranged on both sides of the base body shell for hanging on the curtain or the rail; the adjustment assembly is arranged on the base body shell, including a transmission rod and a connecting member linked to the transmission rod. The suspension members are respectively connected to the connecting members, and the transmission rod is manually driven to rotate, which can drive the suspension members to telescopically move through the connecting members. The hanging parts in the opener and closer are connected to the same connecting part. The rotation of the transmission rod will drive the two hanging parts to extend and retract synchronously. When the heights of the two curtain hooks on which the hanging parts are hung are inconsistent, it is impossible to adjust the height of the hanging parts on one side separately or individually to ensure that the driving wheel can fit the lower end of the guide rail, so that the opener and closer cannot drag the curtain to move normally at the lower end of the guide rail. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model provides a curtain dragging device, which can be hung under a curtain rail, and comprises: a shell, the upper end of which is provided with a driving opening; a driving device, comprising a driving wheel and a motor assembly, wherein the driving wheel is arranged at the driving opening in the shell, the driving wheel part protrudes from the shell through the driving opening and can abut against the lower bottom surface of the curtain rail, the motor assembly is installed in the shell, and can drive the driving wheel to rotate in the driving opening to drive the shell to move along the lower bottom surface of the curtain rail; hanging assemblies are respectively arranged on both sides of the driving opening, wherein the hanging assemblies comprise a hook member that can be hung under the curtain rail, a screw member and a knob arranged in the shell, the lower end of the hook member is connected to the screw member, the knob is connected to the screw member, and can drive the screw member to move up and down relative to the shell by rotation to adjust the distance that the hook member protrudes out of the shell.

[0004] Preferably, the knob is installed in the shell and partially protrudes from the shell. The knob is sleeved on the threaded area of ​​the screw member and can drive the screw member to move up and down relative to the shell by rotation to adjust the distance that the hook member protrudes from the shell.

[0005] Preferably, both sides of the shell are provided with moving channels arranged along the longitudinal direction of the shell, and the side of the moving channel is provided with a first rotating opening connected to the outside, the screw member is arranged in the corresponding side moving channel, and the knob is arranged at the first rotating opening in the shell along the axial direction of the screw member, and the knob part protrudes from the shell through the first rotating opening; the knob can be forced to rotate around the axis of the screw member at the first rotating opening and drive the screw member to move up and down along the moving channel.

[0006] Preferably, a limiting protrusion is fixed in the longitudinal direction in the moving channel, and a limiting groove is provided on the side of the screw member. When the knob rotates around the screw member, the limiting protrusion moves upward or downward along the limiting groove relative to the screw member and limits the relative rotation of the screw member.

[0007] Preferably, a first blocking wall is provided at the upper end of the movable channel, a through hole is provided on the first blocking wall, the lower end of the hook member passes through the through hole and is connected to the upper part of the screw member, and the knob can drive the screw member to move upward along the movable channel until the upper end of the screw member contacts the first blocking wall.

[0008] Preferably, the shell includes a main shell and two sub-shells, the two sub-shells are detachably connected to the two sides of the main shell, the drive opening is arranged on the main shell, the drive wheel is arranged at the drive opening in the main shell, and the motor assembly is installed in the main shell; the two sub-shells are detachably connected to the two side walls of the main shell located on both sides of the drive wheel axis, and a suspension assembly is arranged in each sub-shell, and the lower part of the hook member passes through the upper end of the sub-shell and is connected to the screw member in the sub-shell.

[0009] Preferably, the sub-shell includes an outer cover with an installation cavity inside and a bottom plate detachably connected to the outer cover, and the bottom plate can open or close the installation cavity by separating or connecting with the outer cover; the movable channel includes a first channel located above the knob and a second channel located below the knob, and the first channel is connected to the second channel through a cavity in the middle of the knob; the inner side of the outer cover is provided with a first upper groove body, a first support seat and a first lower groove body in sequence from top to bottom along the longitudinal direction, and the side of the bottom plate facing the outer cover is provided with a second upper groove body, a second support seat and a second lower groove body in sequence from top to bottom along the longitudinal direction; the first upper groove body and the second upper groove body are surrounded by a first channel, and the first lower groove body and the second lower groove body are surrounded by a second channel; the first support seat and the second support seat are surrounded by an installation space for the knob to rotate along the axis and limit the rotation along the axis direction, and the first rotation opening is arranged at the bottom of the first support seat.

[0010] Preferably, the upper end of the first upper trough body and the lower end of the first lower trough body are respectively provided with limiting protrusions that cooperate with the longitudinal limiting grooves on the screw member, the upper end of the first upper trough body is provided with a top wall, the lower end of the hook member passes through the top wall and is connected to the screw member, and the lower end of the first lower trough body is provided with a bottom wall for limiting the downward movement of the screw member.

[0011] Preferably, arc-shaped edges matching the screw member are provided on both sides of the first rotating opening, the lower end of the first upper groove body extends to the upper edge of the first rotating opening to form a first upper limit portion for limiting the upward movement of the knob, and the upper end of the first lower groove body extends to the lower edge of the first rotating opening to form a first lower limit portion for limiting the downward movement of the knob; a second rotating opening is provided at the bottom of the second support seat, and arc-shaped edges matching the screw member are provided on both sides of the second rotating opening, the lower end of the second upper groove body extends to the upper edge of the second rotating opening to form a second upper limit portion for limiting the upward movement of the knob, and the upper end of the second lower groove body extends to the lower edge of the second rotating opening to form a second lower limit portion for limiting the downward movement of the knob.

[0012] Preferably, both sides of the main housing are provided with card slots respectively, and the side of the auxiliary housing facing the main housing is provided with a card engaging portion which can be detachably connected with the corresponding card slot.

[0013] The utility model discloses a curtain dragging device, wherein the hanging assembly of the curtain dragging device comprises a hook member that can be hung under the curtain guide rail, a screw member arranged in a shell, and a knob, wherein the lower end of the hook member is connected to the screw member, and the knob is connected to the screw member, and can drive the screw member to move up and down relative to the shell by rotating to adjust the distance of the hook member extending out of the shell. The hanging assemblies are arranged on both sides of the driving opening respectively, and the knobs in each group of hanging assemblies can rotate to drive the screw member to extend and retract respectively, and the adjustment of the two groups of hanging assemblies does not interfere with each other, and the two hook members can be hung on curtain connectors at different heights, so as to adapt to curtain connectors of different heights or hanging postures, so that the driving wheel can fit closely to the lower end of the guide rail to ensure that there is enough friction to drag the curtain to move along the guide rail.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 The figure is a schematic structural diagram of a curtain dragging device according to an embodiment of the utility model.

[0017] Figure 2 The structure of the curtain dragging device of one embodiment of the utility model is schematically shown. Figure 1 .

[0018] Figure 3 The structure of the curtain dragging device of one embodiment of the utility model is schematically shown. Figure 2 .

[0019] Figure 4 It is a structural schematic diagram of a suspension assembly according to an embodiment of the utility model.

[0020] Figure 5 It is a structural schematic diagram of an outer cover according to an embodiment of the utility model.

[0021] Figure 6 This is a schematic diagram of the structure of the bottom plate of an embodiment of the utility model

[0022] Figure 7 This is a schematic diagram of the connection between the suspension assembly and the outer cover according to an embodiment of the utility model.

[0023] Figure 8 It is a schematic longitudinal cross-sectional view of a secondary housing according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution of the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings of the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are 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, rather than indicating or implying 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 a limitation on the present invention.

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] Unless otherwise defined, the technical or scientific terms used herein shall have the common meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the patent application specification and claims of the utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "a" do not indicate a quantity limitation, but indicate the existence of at least one.

[0029] like Figure 1-6The figure shows an embodiment of the curtain dragging device disclosed in the utility model, which can be hung under the curtain rail, and includes a housing 1, a driving device 2, and a hanging assembly 3. The upper end of the housing 1 is provided with a driving opening 10. The driving device 2 includes a driving wheel 21 and a motor assembly 22. The driving wheel 21 is arranged at the driving opening 10 in the housing 1. The driving wheel 21 partially protrudes from the housing 1 through the driving opening and can abut against the lower bottom surface of the curtain rail. The motor assembly 22 is installed in the housing 1 and can drive the driving wheel 21 to rotate in the driving opening 10 to drive the housing 1 to move along the lower bottom surface of the curtain rail. The hanging assembly 3 is arranged on both sides of the driving opening 10, and the hanging assembly 3 includes a hook member 31 that can be hung under the curtain rail, a screw member 32 arranged in the housing 1, and a knob 33. The lower end of the hook member 31 is connected to the screw member 32, and the knob 33 is connected to the screw member 32, and can drive the screw member 32 to move up and down relative to the housing 1 by rotating to adjust the distance of the hook member 31 extending out of the housing 1. The outer shell 1 can be set to be a cube in the center, and the upper, lower, left and right sides are structures that protrude outward to form an arc surface. Of course, it can also be set to other shapes such as a circle. The suspension components of the curtain dragging device disclosed in this embodiment are respectively arranged on both sides of the driving opening, and the knobs in each group of suspension components can be rotated to drive the screw member to extend and retract. The adjustments of the two groups of suspension components do not interfere with each other. The two hook members can be hung on curtain connectors of different heights, so as to adapt to curtain connectors of different heights or different hanging postures, so that the driving wheel can fit closely on the lower end of the guide rail to ensure that there is sufficient friction to drag the curtain along the guide rail.

[0030] In this embodiment, the knob 33 is installed in the outer shell 1 and partially protrudes from the outer shell. The surfaces where the knob 33 and the screw member 32 contact each other are both provided with threads. The knob 33 is sleeved on the threaded area of ​​the screw member 32 and can drive the screw member 32 to move up and down relative to the outer shell 1 by rotating to adjust the distance that the hook member 31 extends out of the outer shell 1.

[0031] In this embodiment, both sides of the housing 1 are provided with moving channels 400 arranged along the longitudinal direction of the housing, and the side of the moving channel 400 is provided with a first rotating opening 40 connected to the outside. The screw member 32 is arranged in the corresponding side moving channel 400, and can move up and down 400 along the moving channel. The knob 33 is arranged at the first rotating opening 40 in the housing 1 along the axial direction of the screw member 32, and the knob 33 partially protrudes from the housing 1 through the first rotating opening 40, and the size of the part protruding from the housing should be convenient for the user to operate the knob. The knob 33 can be rotated around the axis of the screw member 32 under force at the first rotating opening 40 and drive the screw member 32 to move up and down along the moving channel 400. The length of the screw member 32 is less than the length of the moving channel. The screw and the knob form a spiral transmission structure, the threads between the screw and the knob need to engage with each other, the minimum diameter of the protruding part of the inner thread of the knob is smaller than the maximum diameter of the protruding part of the screw thread, and the area setting of the engaging part should ensure that the user can easily turn the knob when operating the knob, and the knob will not retract into the first rotating opening 40 when the force is applied. The structure is simple to assemble and the connection is stable, with low production and maintenance costs; each component is not easy to wear, which can effectively increase the service life; and it is easy to operate when in use. In order to save production costs and reduce installation difficulty, the knob is preferably set to a cylindrical structure, and the corresponding first rotating opening is set to a rectangle. In other embodiments, the knob can also be set to a sphere, a rugby ball, or a drum.

[0032] In this embodiment, a limiting protrusion 321 is fixed in the longitudinal direction in the moving channel 400, and a limiting groove 320 is provided on the side of the screw member 32. The limiting protrusion 321 is provided corresponding to the screw member 32. When the knob 33 rotates around the screw member 32, the limiting protrusion 321 moves upward or downward along the limiting groove 320 relative to the screw member 32 and limits the relative rotation of the screw member 32. In other words, since the limiting protrusion 321 corresponds to the screw member 32 and limits the screw member 32 in a horizontal state relative to the moving channel, when the knob 33 rotates, the screw member 32 will not rotate with it. Due to the threaded structure between the contact surface of the screw member 33 and the knob, the screw member 32 and the knob 33 will have a longitudinal relative displacement, and the knob is limited in the first rotation opening 40, so the screw member can move up and down in the moving channel 400.

[0033] In this embodiment, a first blocking wall 441 is provided at the upper end of the moving channel 400. The first blocking wall 441 is a structure formed by extending laterally from the inner wall of the shell, and limits the highest position of the moving channel 400, that is, limits the highest position that the screw member 32 can reach. A through hole 440 is provided on the first blocking wall, and the shape of the through hole 440 corresponds to the shape of the cross section of the hook member 31. The hook member 31 is arranged as a structure with an arc-shaped upper part and a vertical lower part. The arc-shaped part is used to hang below the curtain rail, and the vertical part can move along the moving channel 400. The lower end of the hook member 31 passes through the through hole 440 and is connected to the upper part of the screw member 32. The knob 33 can drive the screw member 32 to move upward along the moving channel 400 until the upper end of the screw member 32 contacts the first blocking wall 441. In other embodiments, the first blocking wall may not be provided, and the upper end of the moving channel may be limited by the shell. Then, the upper end of the moving channel is an inwardly curved arc surface, and the displacement of the screw member 32 to contact the shell can also achieve the effect of limiting the moving range of the screw member 32. The provision of the first barrier wall can increase the contact area between the screw member 32 and the housing 1, reduce the pressure at the abutment point, and reduce the wear rate of the housing.

[0034] In this embodiment, the housing 1 includes a main housing 11 and two sub-housings 12. The two sides of the main housing 11 are planar structures. The two sub-housings 12 are detachably connected to the two sides of the main housing 11. The driving opening 10 is arranged on the main housing 11, the driving wheel 21 is arranged at the driving opening 10 in the main housing 11, and the motor assembly 22 is installed in the main housing 11. The two sub-housings 12 are detachably connected to the two side walls of the main housing 11 located on both sides of the axis of the driving wheel 21, and a suspension assembly 3 is arranged in each sub-housing 12. The lower part of the hook member 31 passes through the upper end of the sub-housing 12 and is connected to the screw member 32 in the sub-housing. The sub-housing 12 includes an outer cover 121 with an installation cavity 120 inside and a bottom plate 122 detachably connected to the outer cover. The bottom plate 122 can open or close the installation cavity 120 by separating or connecting with the outer cover 121. The outer cover 121 limits the shape of the installation cavity 120 to a structure with a flat bottom surface and an arc top surface.

[0035] In this embodiment, the moving channel 400 includes a first channel 410 located above the knob and a second channel 420 located below the knob 33, and the first channel 410 is connected to the second channel 420 through the cavity in the middle of the knob 33. The inner side of the outer cover 121 is sequentially distributed with a first upper groove 411, a first support seat 431 and a first lower groove 421 from top to bottom in the longitudinal direction. The first upper groove 411 and the first lower groove 421 are areas surrounded by the arc surface structure formed by the parts of the inner wall of the outer cover 121 located on both sides of the limiting protrusion 321 extending upward and gradually approaching. The side of the bottom plate 122 facing the outer cover 121 is sequentially distributed with a second upper groove 412, a second support seat 432 and a second lower groove 422 from top to bottom in the longitudinal direction. The second upper groove 412 and the second lower groove 422 are areas surrounded by the arc surface structure formed by the parts of the inner wall of the bottom plate 122 corresponding to the first upper groove 411 and the first lower groove 421 extending upward and gradually approaching. The first support seat 431 is a structure formed by a planar structure formed by the protruding structures of the first upper slot body 411 and the first lower slot body 421 near the first rotating opening 40 extending in opposite directions. The second support seat 432 is a structure formed by the second upper slot body 412 and the second lower slot body 422 near the second rotating opening 50. The first upper slot body 411 and the second upper slot body 412 surround the first channel 410, and the first lower slot body 421 and the second lower slot body 422 surround the second channel 420; the first support seat 431 and the second support seat 432 surround to form an installation space 430 for the knob 33 to rotate along the axis and limit the rotation along the axis direction, and the first rotating opening 40 is arranged at the bottom of the first support seat 431.

[0036] In this embodiment, a plurality of anti-slip grooves are arranged in parallel on the side wall of the knob 33 along the axial direction, which can increase the friction force and facilitate the user to turn the knob.

[0037] In this embodiment, the upper end of the first upper trough 411 and the lower end of the first lower trough 421 are respectively provided with limiting protrusions 321 that cooperate with the longitudinal limiting grooves 320 on the screw member 32, the upper end of the first upper trough 411 is provided with a top wall, the top wall coincides with the position of the first blocking wall 441, the lower end of the hook member 31 passes through the top wall and is connected to the screw member 32, and the lower end of the first lower trough 421 is provided with a bottom wall 442 for limiting the downward movement of the screw member 32. The top wall and the bottom wall are used to limit the range of movement of the screw member 32 in the moving channel 400.

[0038] In this embodiment, the lower end of the first upper groove 411 extends to the upper edge of the first rotating opening 40 to form a first upper limit portion 401 for limiting the upward movement of the knob 33, and the upper end of the first lower groove 421 extends to the lower edge of the first rotating opening 40 to form a first lower limit portion 402 for limiting the downward movement of the knob 33. The first upper limit portion 401 and the first lower limit portion 402 are used to limit the knob 33 within the first rotating opening 40 to prevent the knob 33 from moving up and down when rotating, thereby preventing the screw member from being able to move.

[0039] In this embodiment, a second rotation opening 50 is provided at the bottom of the second support seat 432, and arc edges matching the screw member 32 are provided on both sides of the second rotation opening 50. The lower end of the second upper groove body 412 extends to the upper edge of the second rotation opening 50 to form a second upper limit portion 501 for limiting the upward movement of the knob 33, that is, the upper end of the second rotation opening 50, and the upper end of the second lower groove body 412 extends to the lower edge of the second rotation opening 50 to form a second lower limit portion 502 for limiting the downward movement of the knob 33, that is, the lower end of the second rotation opening 50. The second rotation opening 50 is provided to ensure that the side of the knob 33 near the bottom plate 122 will not contact the bottom plate, generate friction when the knob rotates, and thus affect the rotation of the knob. In other embodiments, if the position of the through hole 440 is further away from the bottom plate 122 to ensure that the side of the knob 33 near the bottom plate 122 will not contact the bottom plate, then the second rotation opening 50 may not be provided.

[0040] In another embodiment, the first rotating opening is arranged at the lower end of the auxiliary housing, and a thread structure capable of engaging with the thread of the screw member is arranged in the moving channel. The lower end of the screw member extends out of the auxiliary housing through the first rotating opening and can be longitudinally displaced in the first rotating opening, and drives the hook member to rotate synchronously. The portion of the screw member protruding from the auxiliary housing can be rotated to drive the hook member to move so as to adjust the distance of the hook member extending out of the housing. The hook member and the screw member are rotatably connected, and after the screw member drives the hook member to rotate, the hook member can be rotated alone to adjust the direction of the arc of the upper part of the hook member so as to use the curtain rail.

[0041] The main housing 11 is provided with card slots 110 on both sides thereof, and the auxiliary housing 12 is provided with a card engaging portion 111 detachably connected to the corresponding card slot 110 on the side facing the main housing 11 .

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the utility model.

[0043] In short, the above is only a preferred embodiment of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model should fall within the scope of the present utility model patent.

Claims

1. A curtain dragging device, which can be hung under a curtain rail, characterized in that: include: A housing having a drive opening at an upper end; The driving device comprises a driving wheel and a motor assembly, wherein the driving wheel is arranged at a driving opening in the housing, the driving wheel portion protrudes from the housing through the driving opening and can abut against the lower bottom surface of the curtain guide rail, and the motor assembly is installed in the housing and can drive the driving wheel to rotate in the driving opening to drive the housing to move along the lower bottom surface of the curtain guide rail; The hanging components are respectively arranged on both sides of the driving opening, and the hanging components include a hook member that can be hung under the curtain rail, a screw member and a knob arranged in the shell, the lower end of the hook member is connected to the screw member, and the knob is connected to the screw member, and can drive the screw member to move up and down relative to the shell by rotating to adjust the distance that the hook member extends out of the shell.

2. The curtain dragging device according to claim 1, characterized in that: The knob is installed in the shell and partially protrudes from the shell. The knob is sleeved on the threaded area of ​​the screw member and can drive the screw member to move up and down relative to the shell by rotating to adjust the distance that the hook member protrudes from the shell.

3. The curtain dragging device according to claim 2, characterized in that: The two sides of the shell are respectively provided with moving channels arranged along the longitudinal direction of the shell, and the side of the moving channel is provided with a first rotating opening connected to the outside, the screw member is arranged in the corresponding side moving channel, and the knob is arranged at the first rotating opening in the shell along the axial direction of the screw member, and the knob part protrudes from the shell through the first rotating opening; the knob can be forced to rotate around the axis of the screw member at the first rotating opening and drive the screw member to move up and down along the moving channel.

4. The curtain dragging device according to claim 3, characterized in that: A limiting protrusion is fixed in the longitudinal direction in the moving channel, and a limiting groove is arranged on the side of the screw member. When the knob rotates around the screw member, the limiting protrusion moves upward or downward along the limiting groove relative to the screw member and limits the relative rotation of the screw member.

5. The curtain dragging device according to claim 4, characterized in that: A first blocking wall is provided at the upper end of the moving channel, and a through hole is provided on the first blocking wall. The lower end of the hook member passes through the through hole and is connected to the upper part of the screw member. The knob can drive the screw member to move upward along the moving channel until the upper end of the screw member contacts the first blocking wall.

6. The curtain dragging device according to any one of claims 3 to 5, characterized in that: The housing comprises a main housing and two auxiliary housings, the two auxiliary housings are detachably connected to two sides of the main housing, the driving opening is arranged on the main housing, the driving wheel is arranged at the driving opening in the main housing, and the motor assembly is installed in the main housing; The two auxiliary shells are detachably connected to the two side walls of the main shell located on both sides of the drive wheel axis. A suspension assembly is arranged in each auxiliary shell, and the lower part of the hook member passes through the upper end of the auxiliary shell and is connected to the screw member in the auxiliary shell.

7. The curtain dragging device according to claim 6, characterized in that: The secondary housing comprises an outer cover having an installation cavity therein and a bottom plate detachably connected to the outer cover, wherein the bottom plate can open or close the installation cavity by being separated from or connected to the outer cover; The moving channel includes a first channel located above the knob and a second channel located below the knob, and the first channel is connected to the second channel through a cavity in the middle of the knob; The inner side of the outer cover is provided with a first upper trough body, a first support seat and a first lower trough body in sequence from top to bottom along the longitudinal direction, and the second upper trough body, a second support seat and a second lower trough body are provided with a second upper trough body, a second support seat and a second lower trough body in sequence from top to bottom along the longitudinal direction on the side of the bottom plate facing the outer cover; the first upper trough body and the second upper trough body are surrounded to form a first channel, and the first lower trough body and the second lower trough body are surrounded to form a second channel; the first support seat and the second support seat are surrounded to form an installation space for the knob to rotate along the axis and limit the rotation along the axis direction, and the first rotation opening is arranged at the bottom of the first support seat.

8. The curtain dragging device according to claim 7, characterized in that: The upper end of the first upper trough body and the lower end of the first lower trough body are respectively provided with limiting protrusions that cooperate with the longitudinal limiting grooves on the screw member, the upper end of the first upper trough body is provided with a top wall, the lower end of the hook member passes through the top wall and is connected to the screw member, and the lower end of the first lower trough body is provided with a bottom wall for limiting the downward movement of the screw member.

9. The curtain dragging device according to claim 7, characterized in that: Arc edges matching the screw member are arranged on both sides of the first rotating opening, the lower end of the first upper groove body extends to the upper edge of the first rotating opening to form a first upper limit portion for limiting the upward movement of the knob, and the upper end of the first lower groove body extends to the lower edge of the first rotating opening to form a first lower limit portion for limiting the downward movement of the knob; A second rotating opening is provided at the bottom of the second support seat, and arc edges matching the screw rod are provided on both sides of the second rotating opening. The lower end of the second upper groove body extends to the upper edge of the second rotating opening to form a second upper limit portion for limiting the upward movement of the knob, and the upper end of the second lower groove body extends to the lower edge of the second rotating opening to form a second lower limit portion for limiting the downward movement of the knob.

10. The curtain dragging device according to claim 7, characterized in that: The main housing is provided with card slots on both sides, and the auxiliary housing is provided with a card engaging portion which can be detachably connected with the corresponding card slot on the side facing the main housing.

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