CN217039626U - Lead screw transmission type automatic curtain device - Google Patents

Lead screw transmission type automatic curtain device Download PDF

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Publication number
CN217039626U
CN217039626U CN202122920883.6U CN202122920883U CN217039626U CN 217039626 U CN217039626 U CN 217039626U CN 202122920883 U CN202122920883 U CN 202122920883U CN 217039626 U CN217039626 U CN 217039626U
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China
Prior art keywords
lead screw
shell
hook
threaded connection
curtain device
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Active
Application number
CN202122920883.6U
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Chinese (zh)
Inventor
刘大勇
欧阳正良
江跃军
汪彩成
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Dongguan Legion Technology Co ltd
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Dongguan Legion Technology Co ltd
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Priority to CN202122920883.6U priority Critical patent/CN217039626U/en
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Abstract

The utility model discloses an automatic (window) curtain device of screw drive formula, including actuating mechanism, the automatic (window) curtain device of screw drive formula still includes: the first lead screw is in driving connection with the driving mechanism, and a first hook is in threaded connection with the first lead screw; the second lead screw with the one end that actuating mechanism was kept away from to first lead screw is connected, the screw direction of second lead screw with the screw direction of first lead screw is opposite, threaded connection has the second couple on the second lead screw. The utility model discloses in through with first couple with the second couple respectively with opposite direction of screw first lead screw with the second lead screw is connected to can be through the drive first lead screw with the second lead screw rotates and realizes the closure or the opening of (window) curtain, adopts first lead screw with second lead screw transmission is more stable, and life is longer.

Description

Lead screw transmission type automatic curtain device
Technical Field
The utility model relates to an automatic (window) curtain device technical field, in particular to automatic (window) curtain device of lead screw drive formula.
Background
At present, the existing electric curtain usually adopts a belt transmission mode to drive the curtain to be automatically opened and closed, that is, a motor drives a belt to rotate, and the belt further drives the curtain to move, so that the automatic opening and closing of the curtain are realized. However, when the curtain is driven to move by the belt, the belt is too long and is easy to shake, so that the transmission is not stable enough, the belt is easy to age, and the service life is not long.
Accordingly, the prior art is yet to be improved and developed.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's not enough, provides an automatic (window) curtain device of lead screw drive formula to solve the electric window curtain among the prior art and adopt belt transmission and lead to the unstable, and the easy not long problem of ageing life of belt of transmission.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts as follows:
the utility model provides an automatic (window) curtain device of screw drive formula, includes actuating mechanism, the automatic (window) curtain device of screw drive formula still includes:
the first lead screw is in driving connection with the driving mechanism, and a first hook is in threaded connection with the first lead screw;
the second lead screw is connected with one end, far away from the driving mechanism, of the first lead screw, the thread direction of the second lead screw is opposite to that of the first lead screw, and a second hook is connected to the second lead screw in a threaded manner.
The screw transmission type automatic curtain device further comprises a shell, and the first screw and the second screw are both positioned in an inner cavity of the shell;
the shell is provided with a gap, the gap is parallel to the first lead screw or the second lead screw, and the first hook and the second hook are arranged in the gap in a penetrating mode and are partially arranged outside the shell.
The screw transmission type automatic curtain device further comprises a fixing piece, the shell comprises a first sub-shell and a second sub-shell, and the first sub-shell, the fixing piece and the second sub-shell are sequentially connected;
the first lead screw is positioned in the first sub-shell, the second lead screw is positioned in the second sub-shell, and the joint of the first lead screw and the second lead screw is positioned in the fixing piece.
The automatic curtain device of lead screw transmission formula, wherein, be connected with the connecting piece between first lead screw and the second lead screw, the connecting piece is located in the mounting, and with the mounting rotates to be connected.
The automatic curtain device of lead screw transmission formula, wherein, be provided with the bearing between the connecting piece with the mounting.
The lead screw transmission type automatic curtain device is characterized in that one end of the second lead screw, which is far away from the first lead screw, is provided with a mounting seat, and the second lead screw is rotationally connected with the mounting seat;
one end of the shell, which is far away from the driving mechanism, is connected with the mounting seat.
The automatic curtain device of lead screw transmission formula, wherein, first couple includes:
a threaded connection assembly threadedly connected with the first lead screw;
and the hook piece is connected with the threaded connection assembly, penetrates through the gap and is partially arranged outside the shell.
The automatic window curtain device of lead screw drive formula, wherein, hook spare includes:
one end of the vertical part is connected with the threaded connection assembly, and the other end of the vertical part extends out of the shell;
the screw-driven automatic curtain device comprises a vertical part, a horizontal part and a lead screw transmission type automatic curtain device, wherein the vertical part is connected with one end of the horizontal part, which is far away from the screw connection assembly;
go up the connecting portion with form threaded connection hole between the connecting portion down, first lead screw wear to locate in the threaded connection hole, and with threaded connection subassembly threaded connection.
The automatic curtain device of lead screw transmission formula, wherein, go up connecting portion with connecting portion pass through bolted connection down, the cover is equipped with the spring on the bolt, the one end top of spring hold in go up connecting portion, the other end top hold in connecting portion down.
Has the beneficial effects that: the utility model discloses in through with first couple with the second couple respectively with opposite direction of screw first lead screw with the second lead screw is connected to can be through the drive first lead screw with the second lead screw rotates and realizes the closure of (window) curtain or opens, adopts first lead screw with second lead screw transmission is more stable, and life is longer.
Drawings
Fig. 1 is a schematic structural view of the screw-driven automatic curtain device provided by the present invention;
FIG. 2 is a schematic view at A in FIG. 1;
fig. 3 is an exploded view of the screw-driven automatic curtain device provided by the present invention;
FIG. 4 is a schematic view at B of FIG. 3;
fig. 5 is a schematic structural view of the first hook provided by the present invention;
fig. 6 is a schematic structural view of the third hook provided by the present invention;
fig. 7 is a schematic structural diagram of the driving mechanism provided by the present invention;
fig. 8 is a schematic partial structural view of the housing provided by the present invention;
the labels in the figures are: 1. a drive mechanism; 2. a first lead screw; 3. a second lead screw; 4. a first hook; 41. a threaded connection assembly; 411. an upper connecting portion; 412. a lower connecting portion; 42. a hook member; 421. a vertical portion; 422. a horizontal portion; 5. a second hook; 6. a housing; 61. a first sub-housing; 62. a second sub-housing; 7. a gap; 8. a fixing member; 81. a first fixed part; 82. an intermediate connecting portion; 83. a second fixed part; 9. a connecting member; 10. a bearing; 11. a mounting base; 12. connecting a threaded hole; 13. a bolt; 14. a spring; 15. a first roller assembly; 151. a first connecting shaft; 152. a first roller; 16. a first through hole; 17. a third hook; 171. a second roller assembly; 1711. a second connecting shaft; 1712. a second roller; 172. a hanging part; 173. an annular hook portion; 18. a fourth hook; 19. a power plug; 20. a cable; 21. the motor is driven.
Detailed Description
The utility model provides an automatic (window) curtain device of lead screw transmission formula, for making the utility model discloses a purpose, technical scheme and effect are clearer, more clear and definite, and it is right that the following refers to the attached drawing and the embodiment is lifted the utility model discloses further detailed description. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It should be further noted that the same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are the terms "upper", "lower", "left", "right", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of the description, but not for indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and should not be construed as limitations of the present patent, and specific meanings of the above terms can be understood according to specific situations by those of ordinary skill in the art.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
The following description of the embodiments will further explain the present invention by referring to the figures.
The embodiment provides a lead screw transmission type automatic curtain device, as shown in fig. 1 to 3, the lead screw transmission type automatic curtain device further comprises a first lead screw 2 and a second lead screw 3, the driving mechanism 1 is in driving connection with one end of the first lead screw 2, the second lead screw 3 is connected with one end of the first lead screw 2 far away from the driving mechanism 1, and the first lead screw 2 and the second lead screw 3 are located on the same straight line; the thread direction of the second lead screw 3 is opposite to that of the first lead screw, the first lead screw 2 is in threaded connection with a first hook 4, the second lead screw 3 is in threaded connection with a second hook 5, and the first hook 4 and the second hook 5 are respectively used for connecting parts of the split curtain; when the driving motor drives the first lead screw 2 and the second lead screw 3 to synchronously rotate, the first hook 4 moves along the first lead screw 2, the second hook 5 moves along the second lead screw 3, and the first hook 4 and the second hook 5 move in opposite directions or in a back direction so as to close or open the curtain.
The utility model discloses in through with first couple 4 with second couple 5 respectively with opposite direction of screw first lead screw 2 with second lead screw 3 is connected to can be through the drive first lead screw 2 with second lead screw 3 rotates and realizes the closure or the opening of (window) curtain, adopts first lead screw 2 with the transmission of second lead screw 3 is more stable, and life is longer.
The lead screw transmission type automatic curtain device further comprises a shell 6, and the first lead screw 2 and the second lead screw 3 are both positioned in an inner cavity of the shell 6; an installation seat 11 is arranged at one end, far away from the first lead screw 2, of the second lead screw 3, and the second lead screw 3 is rotatably connected with the installation seat 11;
one end of the shell is connected with the driving mechanism 1, one end of the shell 6, which is far away from the driving mechanism 1, is connected with the mounting seat 11, so that the shell 6 can be fixed through the driving mechanism 1 and the mounting seat 11, the first lead screw 2 and the second lead screw 3 can also be mounted between the driving mechanism 1 and the mounting seat 11, and the first lead screw 2 and the second lead screw 3 can synchronously rotate along with the driving shaft of the driving mechanism 1 and simultaneously rotate relative to the mounting seat 11.
As shown in fig. 8, a gap 7 is provided on the housing 6, and the gap 7 is parallel to the first lead screw 2 or the second lead screw 3; the first hook 4 and the second hook 5 are arranged in the gap 7 in a penetrating manner, and are partially arranged outside the shell 6; specifically, the first hook 4 and the second hook 5 are both arranged in the gap 7 in a penetrating manner, one end of the first hook 4 located in the housing 6 is connected with the first lead screw 2, and one end of the first hook 4 away from the first lead screw 2 is located outside the housing 6 and is used for connecting a curtain; one end of the second hook 5, which is positioned in the shell 6, is connected with the second lead screw 3, and one end of the second hook 5, which is far away from the second lead screw 3, is positioned outside the shell 6 and is used for connecting another part of curtain. Because the first hook 4 and the second hook 5 are both embedded in the gap 7, when the driving mechanism 1 drives the first lead screw 2 and the second lead screw 3 to rotate, the first hook 4 and the second hook 5 cannot rotate along with the first lead screw 2 or the second lead screw 3, but only can move along the length direction of the first lead screw 2 or the second lead screw 3, so as to drive the curtain to move to realize the opening and closing of the curtain.
As shown in fig. 4, the lead screw driven automatic window shade further includes a fixing member 8, the housing 6 includes a first sub-housing 61 and a second sub-housing 62, and the first sub-housing 61, the fixing member 8 and the second sub-housing 62 are connected in sequence; the first lead screw 2 is positioned in the first sub-shell 61, the second lead screw 3 is positioned in the second sub-shell 62, and the joint of the first lead screw 2 and the second lead screw 3 is positioned in the fixing piece 8; by providing the fixing member 8, the first lead screw 2 and the second lead screw 3 can be supported and fixed in the housing 6. Specifically, the fixing member 8 includes a first fixing portion 81, an intermediate connecting portion 82 and a second fixing portion 83 connected in sequence, and an inner cavity of the first fixing portion 81 is communicated with an inner cavity of the second fixing portion 83; one end of the first sub-housing 61, which is far away from the driving mechanism 1, is sleeved on the first fixing part 81 and is fixedly connected with the first fixing part 81; one end of the second sub-housing 62 away from the mounting base 11 is sleeved on the second fixing portion 83 and is fixedly connected with the second fixing portion 83; the first sub-housing 61 and the second sub-housing 62 are respectively located on both sides of the prime number intermediate connection portion 82. One end, far away from the driving motor, of the first lead screw 2 is located in the first fixing portion 81, and one end, far away from the mounting seat 11, of the second lead screw 3 is located in the second fixing portion 83.
A connecting piece 9 is connected between the first lead screw 2 and the second lead screw 3, namely, the first lead screw 2 is fixedly connected with the second lead screw 3 through the connecting piece 9; the connecting piece 9 is positioned in the fixing piece 8 and is rotationally connected with the fixing piece 8; when the driving mechanism 1 drives the first lead screw 2 and the second lead screw 3 to synchronously rotate, the connecting piece 9 rotates relative to the fixing piece 8.
The connecting piece 9 is sleeved with a bearing 10, namely, the bearing 10 is arranged between the connecting piece 9 and the fixing piece 8; by providing the bearing 10, friction between the attachment member 9 and the fixing member 8 is reduced when the attachment member 9 rotates.
As shown in fig. 5, the first hook 4 includes a threaded connection component 41 and a hook component 42, the threaded connection component 41 is in threaded connection with the first lead screw 2, the hook component 42 is connected with the threaded connection component 41, and the hook component 42 is inserted into the gap 7 and is partially disposed outside the housing 6; the part of the hook member 42 outside the housing 6 is connected with a curtain. When the driving mechanism 1 drives the first lead screw 2 to rotate, the threaded connection assembly 41 rotates relative to the first lead screw 2, and the hook 42 moves along the gap 7.
The hook member 42 comprises a vertical part 421 and a horizontal part 422, the vertical part 421 is perpendicular to the first lead screw 2, one end of the vertical part 421 is connected with the threaded connection assembly 41, and the other end of the vertical part 421 extends out of the housing 6; the horizontal portion 422 is connected to an end of the vertical portion 421 away from the screw connection assembly 41, and the horizontal portion 422 is perpendicular to the vertical portion 421, and the horizontal portion 422 is used for connecting a curtain.
A first roller assembly 15 is arranged on the vertical portion 421, the first roller assembly 15 is rotatably connected with the vertical portion 421, the first roller assembly 15 is located in the first sub-housing 61, and when the first hook 4 slides along the gap 7, the first roller assembly 15 slides at the bottom of the first sub-housing 61; by arranging the first roller assembly 15 on the first hook 4, the first lead screw 2 can be supported while the first hook 4 is convenient to slide.
The vertical portion 421 is provided with a first through hole 16; the first roller assembly 15 includes a first connecting shaft 151, and two first rollers 152 respectively connected to both ends of the first connecting shaft 151; the first connecting shaft 151 penetrates through the first through hole 16 and is rotatably connected with the vertical portion 421, the two first rollers 152 are both in contact with the bottom of the inner cavity of the first sub-housing 61, and the two first rollers 152 are respectively located at two sides of the gap 7.
The threaded connection assembly 41 comprises an upper connection part 411 and a lower connection part 412, wherein the upper connection part 411 is connected with the lower connection part 412; a threaded connection hole 12 is formed between the upper connection portion 411 and the lower connection portion 412, and the first lead screw 2 is inserted into the threaded connection hole 12 and is in threaded connection with the threaded connection assembly 41; one end of the vertical portion 421 away from the horizontal portion 422 is connected to the lower connection portion 412.
The upper connecting portion 411 and the lower connecting portion 412 are connected through a bolt 13, and two bolts 13 are provided, and the upper connecting portion 411 and the lower connecting portion 412 are connected from two sides of the threaded connecting hole 12 respectively, so as to ensure the connection stability of the upper connecting portion 411 and the lower connecting portion 412. Further, a spring 14 is sleeved on the bolt 13, one end of the spring 14 abuts against the upper connecting portion 411, the other end of the spring 14 abuts against the lower connecting portion 412, and the spring 14 is located between the upper connecting portion 411 and the lower connecting portion 412; the upper connecting portion 411 and the lower connecting portion 412 have a certain gap therebetween to accommodate the spring 14; the spring 14 is arranged between the upper connecting portion 411 and the lower connecting portion 412, so that the distance between the upper connecting portion 411 and the lower connecting portion 412 can be automatically adjusted, when the first hook 4 slides through an uneven part on the first lead screw 2, the distance between the upper connecting portion 411 and the lower connecting portion 412 can be automatically adjusted to cross an obstacle, and therefore smooth movement is achieved, and the situation that the first hook 4 is blocked and cannot smoothly move along the first lead screw 2 is avoided.
The second hook 5 has the same structure as the first hook 4, and only the arrangement directions are opposite, that is, the first hook 4 and the second hook 5 are arranged oppositely; therefore, the detailed structure of the second hook 5 is not described in this embodiment.
The screw rod transmission type automatic curtain device further comprises a plurality of third hooks 17 and a plurality of fourth hooks 18, the plurality of third hooks 17 are arranged on the first sub-shell 61 in a sliding mode, and the plurality of fourth hooks 18 are arranged on the second sub-shell 62 in a sliding mode; the third hooks 17 and the fourth hooks 18 are respectively used for connecting curtains on two sides; the third hook 17 and the fourth hook 18 have the same structure, and the third hook 17 is connected to the first sub-housing 61 in the same manner as the fourth hook 18 is connected to the second sub-housing 62. When the driving mechanism 1 drives the first lead screw 2 and the second lead screw to rotate, the first hook 4 and the second hook 5 respectively drive the curtains on two sides to move, and the third hook 17 and the fourth hook 18 are driven by the curtains to move, that is, the third hook 17 and the fourth hook 18 are driven, and when the curtains are driven by the first hook 4 or the second hook 5, the third hook 17 or the fourth hook 18 moves along with the movement of the curtains. Through the arrangement of the plurality of third hooks 17 and the plurality of fourth hooks 18, the curtain can move more smoothly.
Specifically, as shown in fig. 6, the third hook 17 includes a second roller assembly 171, a hanging portion 172 and an annular hook portion 173, the second roller assembly 171, the hanging portion 172 and the annular hook portion 173 are connected in sequence, the second roller assembly 171 is located in the first sub-housing 61, and when the first hook 4 slides along the gap 7, the first roller assembly 15 slides at the bottom of the inner cavity of the first sub-housing 61; the hanging part 172 is inserted into the gap 7, and the annular hook 173 is used for connecting a curtain. The second roller assembly 171 comprises a second connecting shaft 1711 and two second rollers 1712 which are respectively connected with two ends of the second connecting shaft 1711 in a rotating manner; the second connecting shaft 1711 is fixedly connected to the top of the hanging portion 172, the two second rollers 1712 are both in contact with the bottom of the inner cavity of the first sub-housing 61, and the two first rollers 152 are respectively located on two sides of the gap 7.
Since the third hook 17 and the fourth hook 18 have the same structure, the mechanism of the fourth hook 18 is not described in detail in this embodiment.
As shown in fig. 7, the driving mechanism 1 includes a power plug 19, a cable 20 and a driving motor 21, the power plug 19, the cable 20 and the driving motor 21 are sequentially connected in a point-to-point manner, and after the power plug 19 is plugged into a socket to supply power to the driving motor 21, the driving motor 21 can be remotely controlled by a remote control device to operate to drive the first lead screw 2 and the second lead screw 3 to rotate, so as to open and close the window curtain.
To sum up, the utility model discloses an automatic (window) curtain device of screw drive formula, including actuating mechanism, the automatic (window) curtain device of screw drive formula still includes: the first lead screw is in driving connection with the driving mechanism, and a first hook is in threaded connection with the first lead screw; the second lead screw with the one end that actuating mechanism was kept away from to first lead screw is connected, the screw direction of second lead screw with the screw direction of first lead screw is opposite, threaded connection has the second couple on the second lead screw. The utility model discloses in through with first couple with the second couple respectively with opposite direction of screw first lead screw with the second lead screw is connected to can be through the drive first lead screw with the second lead screw rotates and realizes the closure or the opening of (window) curtain, adopts first lead screw with second lead screw transmission is more stable, and life is longer.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims (8)

1. The utility model provides an automatic (window) curtain device of screw drive formula, includes actuating mechanism, its characterized in that, the automatic (window) curtain device of screw drive formula still includes:
the first lead screw is in driving connection with the driving mechanism, and a first hook is in threaded connection with the first lead screw;
the second lead screw is connected with one end, far away from the driving mechanism, of the first lead screw, the thread direction of the second lead screw is opposite to that of the first lead screw, and a second hook is connected to the second lead screw in a threaded manner;
the lead screw transmission type automatic curtain device further comprises a shell, and the first lead screw and the second lead screw are both positioned in an inner cavity of the shell;
a gap is formed in the shell and is parallel to the first lead screw or the second lead screw, and the first hook and the second hook are arranged in the gap in a penetrating mode and are partially arranged outside the shell;
the lead screw transmission type automatic curtain device further comprises a fixing piece, the shell comprises a first sub-shell and a second sub-shell, and the first sub-shell, the fixing piece and the second sub-shell are sequentially connected;
the first lead screw is positioned in the first sub-shell, the second lead screw is positioned in the second sub-shell, and the joint of the first lead screw and the second lead screw is positioned in the fixing piece.
2. The lead screw driven automatic window curtain device of claim 1, wherein a connecting member is connected between the first lead screw and the second lead screw, and the connecting member is located in the fixing member and is rotatably connected with the fixing member.
3. The lead screw driven automatic window covering of claim 2, wherein a bearing is provided between the connecting member and the fixing member.
4. The lead screw driven automatic window curtain device according to claim 1, wherein a mounting seat is arranged at one end of the second lead screw, which is far away from the first lead screw, and the second lead screw is rotatably connected with the mounting seat;
one end of the shell, which is far away from the driving mechanism, is connected with the mounting seat.
5. The lead screw driven automatic window covering of claim 1, wherein the first hanger comprises:
a threaded connection assembly threadedly connected with the first lead screw;
the hook piece is connected with the threaded connection assembly, penetrates through the gap and is partially arranged outside the shell.
6. The lead screw driven automatic window covering of claim 5, wherein the hook member comprises:
one end of the vertical part is connected with the threaded connection assembly, and the other end of the vertical part extends out of the shell;
the horizontal part is connected with one end, far away from the threaded connection assembly, of the vertical part, and the horizontal part is perpendicular to the vertical part.
7. The lead screw driven automatic window covering of claim 6, wherein the threaded connection assembly comprises an upper connection portion and a lower connection portion, the upper connection portion being connected to the lower connection portion;
go up connecting portion with form threaded connection hole between the lower connecting portion, first lead screw wear to locate in the threaded connection hole, and with threaded connection subassembly threaded connection.
8. The lead screw driven automatic window curtain device as recited in claim 7, wherein the upper connecting portion and the lower connecting portion are connected by a bolt, a spring is sleeved on the bolt, one end of the spring is supported on the upper connecting portion, and the other end of the spring is supported on the lower connecting portion.
CN202122920883.6U 2021-11-24 2021-11-24 Lead screw transmission type automatic curtain device Active CN217039626U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122920883.6U CN217039626U (en) 2021-11-24 2021-11-24 Lead screw transmission type automatic curtain device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122920883.6U CN217039626U (en) 2021-11-24 2021-11-24 Lead screw transmission type automatic curtain device

Publications (1)

Publication Number Publication Date
CN217039626U true CN217039626U (en) 2022-07-26

Family

ID=82474503

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202122920883.6U Active CN217039626U (en) 2021-11-24 2021-11-24 Lead screw transmission type automatic curtain device

Country Status (1)

Country Link
CN (1) CN217039626U (en)

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