CN217301477U - Double-belt transmission structure and curtain machine - Google Patents
Double-belt transmission structure and curtain machine Download PDFInfo
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- CN217301477U CN217301477U CN202220673436.7U CN202220673436U CN217301477U CN 217301477 U CN217301477 U CN 217301477U CN 202220673436 U CN202220673436 U CN 202220673436U CN 217301477 U CN217301477 U CN 217301477U
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Abstract
The utility model discloses a double-belt transmission structure and a curtain machine, which comprises a transmission shaft, wherein the transmission shaft is driven by a first driver to rotate; the first driving wheel is provided with a first mounting hole which is used for being in sliding sleeve joint with the transmission shaft; the second driving wheel is provided with a second mounting hole which is used for being in sliding sleeve joint with the transmission shaft; the control mechanism comprises a second driver, a shifting piece and a moving block, wherein the shifting piece is driven by the second driver to rotate, the shifting piece extends out of a shifting end along the radial direction, and the moving block and the transmission shaft form a connecting structure which is relatively fixed in the axial direction and can relatively rotate in the circumferential direction; the side surface of the moving block is concavely provided with a toggle hole, and the toggle end is inserted in the toggle hole; the poking end drives the moving block to move axially, so that the transmission shaft is only inserted into the first mounting hole or is simultaneously inserted into the first mounting hole and the second mounting hole; and the self-locking component comprises an insertion block and a first elastic piece for driving the insertion block to be inserted into the second mounting hole.
Description
Technical Field
The utility model relates to a curtain machine technical field especially relates to a double belt drive structure and curtain machine.
Background
With the development of science and technology, a curtain machine capable of electrically controlling a curtain appears; the curtain machine comprises a curtain machine for controlling vertical curtains, wherein the conventional vertical curtain machine generally connects the vertical curtains to pulleys, then a plurality of pulleys are arranged on a curtain rail in a sliding way and drive the pulleys to move through a belt; in addition, the light adjusting shaft penetrates through the plurality of pulleys, and the vertical curtain is driven to turn over the sheet by rotating the light adjusting shaft; wherein, the belt and the light adjusting shaft need to be driven by one motor respectively, and the light adjusting shaft is of a rigid structure, so that the curtain machine cannot be in a bent rail type.
In patent documents CN112554765A and CN215634784U, both disclosed a structure using dual belt drive, in which the first belt completes the vertical curtain flap motion and the second belt completes the vertical curtain open/close motion; the first belt is driven by the first transmission wheel, the second belt is driven by the second transmission wheel, and the transmission shaft is controlled to move by the electromagnet, so that the transmission shaft only drives the first transmission wheel to rotate or simultaneously drives the first transmission wheel and the second transmission wheel to rotate. However, the use of electromagnets to control the movement of the drive shaft has some disadvantages, such as: 1. the electromagnet is adopted to control the transmission shaft to move, the internal structure is complex, the production is inconvenient, and the transmission box of the curtain machine is likely to have larger volume; 2. the moving distance of the transmission shaft controlled by the electromagnet is difficult to grasp, and the transmission shaft needs to be debugged for many times to be accurately positioned, so that the production is inconvenient, and the failure rate is high.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a dual-belt transmission structure and a curtain machine, which can solve at least one of the above problems to a certain extent.
The utility model discloses the technical scheme of an aspect is so realized:
a dual belt drive structure comprising:
the transmission shaft is driven by the first driver to rotate;
the axle center of the first driving wheel is provided with a first mounting hole which is used for being in sliding sleeve joint with the transmission shaft, and the first mounting hole and the transmission shaft form circumferential transmission connection;
a second mounting hole which is used for being in sliding sleeve connection with the transmission shaft is formed in the axis position of the second driving wheel, and the second mounting hole is in circumferential transmission connection with the transmission shaft;
the control mechanism comprises a second driver, a shifting piece driven by the second driver to rotate and a moving block, wherein the shifting piece extends out of a shifting end along the radial direction, and the moving block and the transmission shaft form a connecting structure which is relatively fixed in the axial direction and relatively rotatable in the circumferential direction; a toggle hole is concavely arranged on the side surface of the moving block, and the toggle end is inserted into the toggle hole; the poking end drives the moving block to move axially, so that the transmission shaft is driven to move axially, and the transmission shaft is only inserted into the first mounting hole or is inserted into the first mounting hole and the second mounting hole simultaneously;
the self-locking component comprises an inserting block and a first elastic piece for driving the inserting block to be inserted into the second mounting hole; when the transmission shaft is separated from the second mounting hole, the insertion block is inserted into the second mounting hole.
As a further alternative of the double-belt transmission structure, the double-belt transmission structure further comprises a shell, wherein a sliding channel for the moving block to move along the axial direction is formed in the shell; the moving block and the sliding channel are kept relatively fixed in the circumferential direction.
As a further alternative of the double-belt transmission structure, a limiting hole is formed in the shell, the insert block is slidably arranged in the limiting hole, and the insert block and the limiting hole are circumferentially and relatively fixed; when the plug block is inserted into the second mounting hole, at least part of the jack is still positioned in the limiting hole.
As a further alternative of the double-belt transmission structure, the first elastic member is a spring, the first elastic member is located in the limiting hole, one end of the first elastic member abuts against the bottom of the limiting hole, and the other end of the first elastic member abuts against the insert block.
As a further alternative of the double-belt transmission structure, a first through hole arranged along the axial direction is formed in the moving block, and the first through hole is communicated with the toggle hole; a connecting cylinder is coaxially arranged at one end of the transmission shaft, the connecting cylinder is slidably sleeved in the first through hole, the end part of the connecting cylinder, which penetrates through the first through hole, is connected with a limiting block, and the width of the limiting block is greater than that of the first through hole; a second elastic piece for driving the transmission shaft and the moving block to keep away from each other is arranged between the transmission shaft and the moving block; the elastic force applied by the second elastic piece to the transmission shaft is larger than the elastic force applied by the first elastic piece to the insertion block.
As a further alternative of the double-belt transmission structure, the second elastic member is a spring sleeved on the connecting cylinder.
As a further alternative of the double-belt transmission structure, the connecting cylinder has an external thread, the transmission shaft is provided with a connecting hole, and the connecting cylinder is in threaded connection with the connecting hole.
As a further alternative of the double-belt transmission structure, a second through hole arranged along the axial direction is formed in the moving block and communicated with the toggle hole; the first through hole and the second through hole are respectively positioned at two corresponding sides of the toggle hole; the width of the limiting block is smaller than that of the second through hole; the end face of the limiting block is provided with a screwing structure; an avoiding structure is formed on the shifting end of the shifting piece, so that an accessible installation path is formed between the first through hole and the second through hole.
As a further alternative of the double belt transmission structure, the first transmission wheel and the second transmission wheel are rotatably disposed in the housing through bearings, and the positions of the first transmission wheel and the second transmission wheel in the housing are fixed; the first driver is connected with a driving gear, a driven gear is sleeved on the transmission shaft in a sliding manner, and the transmission shaft and the driven gear form a circumferential transmission structure; the driving gear is meshed with the driven gear; the driven gear is rotatably arranged in the shell through a bearing, and the position of the driven gear in the shell is fixed.
The double-belt transmission structure has the beneficial effects that: the control mechanism drives the shifting piece to rotate through the second driver, and enables the shifting end of the shifting piece to push the upper wall or the lower wall in the shifting hole of the moving block according to the fact that the shifting piece rotates in different directions, so that the moving block moves along the axial direction; the moving block drives the transmission shaft to move; the size and the rotation angle of the stirring end can accurately calculate the distance between the stirring end and the downward stirring end, so that the axial movement distance of the moving block can be conveniently mastered, the accurate movement of the transmission shaft can be conveniently realized, the structure is simple, and the production is convenient.
The utility model discloses on the other hand's technical scheme is realized like this:
a curtain machine comprises any one of the double-belt transmission structures.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a double belt transmission structure of the present invention;
fig. 2 is a schematic cross-sectional view of a dual belt transmission structure of the present invention;
FIG. 3 is a schematic view of the connection structure of the control mechanism and the first and second driving wheels;
FIG. 4 is a sectional view of a connection structure of the control mechanism and the first and second transmission wheels;
FIG. 5 is a schematic view of a connection structure between the control mechanism and the transmission shaft;
fig. 6 is an enlarged view of a in fig. 1.
In the figure: 100. a first synchronization belt; 200. a second synchronous belt;
1. a first driver; 11. a driving gear; 12. a driven gear; 2. a drive shaft; 21. connecting the columns; 22. a limiting block; 23. a second elastic member; 24. connecting holes; 3. a first drive pulley; 31. a first mounting hole; 4. a second transmission wheel; 41. a second mounting hole; 5. a control mechanism; 51. a second driver; 52. A toggle piece; 521. a toggle end; 522. an avoidance structure; 53. a moving block; 531. a toggle hole; 532. a first perforation; 533. a second perforation; 6. a self-locking member; 61. inserting a block; 62. a first elastic member; 7. a housing; 71. a slide channel; 72. and a limiting hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1 to 6, there is shown a double belt transmission structure, including a transmission shaft 2, a first transmission wheel 3, a second transmission wheel 4, a control mechanism 5 and a self-locking member 6, wherein the first transmission wheel 3 is connected with a first synchronous belt 100, and the second transmission wheel 4 is connected with a second synchronous belt 200;
referring to fig. 2 and 4, the transmission shaft 2 is driven by the first driver 1 to rotate, a first mounting hole 31 for slidably sleeving the transmission shaft 2 is formed in the axial position of the first transmission wheel 3, and the first mounting hole 31 is in circumferential transmission connection with the transmission shaft 2; a second mounting hole 41 which is used for being in sliding sleeve connection with the transmission shaft 2 is formed in the axis position of the second transmission wheel 4, and the second mounting hole 41 is in circumferential transmission connection with the transmission shaft 2; the first mounting hole 31 and the second mounting hole 41 may be holes with regular polygonal cross sections, such as regular quadrilateral holes, hexagonal holes, etc., or special holes with internal teeth; the transmission shaft 2 corresponds to the first and second mounting holes 31 and 41, so that when the transmission shaft 2 rotates, the first and second transmission wheels 3 and 4 can be driven to rotate.
Referring to fig. 3, 4 and 5, the control mechanism 5 includes a second driver 51, a shifting member 52 driven by the second driver 51 to rotate, and a moving block 53, wherein the shifting member 52 extends out of a shifting end 521 in a radial direction, and the moving block 53 and the transmission shaft 2 form a connection structure which is relatively fixed in an axial direction and relatively rotatable in a circumferential direction; a toggle hole 531 is concavely arranged on the side surface of the moving block 53, and the toggle end 521 is inserted into the toggle hole 531; the shifting end 521 drives the moving block 53 to move axially, so as to drive the transmission shaft 2 to move axially, and the transmission shaft 2 is only inserted into the first mounting hole 31 or inserted into the first mounting hole 31 and the second mounting hole 41 simultaneously; when the transmission shaft 2 is only inserted into the first mounting hole 31, the transmission shaft 2 only drives the first transmission wheel 3 to rotate, so that the first synchronous belt 100 performs vertical curtain turning motion; when the transmission shaft 2 is inserted into the first mounting hole 31 and the second mounting hole 41, the transmission shaft 2 drives the first driving wheel 3 and the second driving wheel 4 to rotate at the same time, so that the first synchronous belt 100 and the second synchronous belt 200 perform vertical curtain turning and opening and closing actions at the same time; the working principle of the first synchronous belt 100 for realizing the sheet turning action and the second synchronous belt 200 for realizing the opening and closing action can refer to the prior art with the publication number of CN112554765A or CN 215634784U. Both the first driver 1 and the second driver 51 may be motors. In addition, the double-belt transmission structure of the present embodiment can realize the single flap-turning action of the vertical curtain or the single opening and closing action of the vertical curtain in cooperation with the differential transmission structure in patent No. CN 216060124U.
Referring to fig. 2 and 4, the self-locking member 6 includes a plug 61 and a first elastic member 62 for driving the plug 61 to be plugged in the second mounting hole 41; when the transmission shaft 2 is disengaged from the second mounting hole 41, the insertion block 61 is inserted into the second mounting hole 41. Therefore, the second driving wheel 4 can be prevented from rotating, and the vertical curtain can be ensured to independently realize the sheet turning action.
In the above embodiment, referring to fig. 2 and fig. 6, the dual-belt transmission structure further includes a housing 7, and a sliding channel 71 for the moving block 53 to move along the axial direction is formed in the housing 7; the moving block 53 and the sliding channel 71 are circumferentially fixed relative to each other. In this way, the sliding channel 71 is used for limiting the moving block 53, so that when the moving block 53 is shifted by the shifting piece 52, only axial movement can be performed and circumferential rotation is not generated; the movable block 53 can be prevented from being driven to rotate when the transmission shaft 2 rotates, so that the movable block 53 and the toggle piece 52 are prevented from interfering.
In the above embodiment, in order to realize circumferential fixation of the second driving wheel 4, referring to fig. 2, a limiting hole 72 is provided in the housing 7, the insert 61 is slidably disposed in the limiting hole 72, and the insert 61 and the limiting hole 72 are circumferentially kept relatively fixed; when the plug block 61 is plugged into the second mounting hole 41, at least part of the plug hole is still located in the limiting hole 72. Specifically, the first elastic element 62 is a spring, the first elastic element 62 is located in the limiting hole 72, one end of the first elastic element 62 abuts against the bottom of the limiting hole 72, and the other end abuts against the insertion block 61. When the transmission shaft 2 moves axially to be separated from the second mounting hole 41, the first elastic piece 62 drives the insertion block 61 to be inserted into the second mounting hole 41; when the transmission shaft 2 is axially moved to be inserted into the second mounting hole 41, the transmission shaft 2 ejects the insertion block 61 from the second mounting hole 41.
In some specific embodiments, in order to facilitate the moving block 53 and the transmission shaft 2 to form a connection structure that is relatively fixed in the axial direction and relatively rotatable in the circumferential direction, referring to fig. 5, a first through hole 532 is provided in the moving block 53 along the axial direction, and the first through hole 532 is communicated with the toggle hole 531; a connecting cylinder 21 is coaxially arranged at one end of the transmission shaft 2, the connecting cylinder 21 is slidably sleeved in the first perforation 532, the end of the connecting cylinder 21 penetrating through the first perforation 532 is connected with a limiting block 22, and the width of the limiting block 22 is greater than that of the first perforation 532; a second elastic piece 23 for driving the transmission shaft 2 and the moving block 53 to keep away from each other is arranged between the two. In this embodiment, the transmission shaft 2 and the connecting column 21 may be an integrally formed structure, or may be a detachable assembly structure, and the second elastic element 23 can make the transmission shaft 2 be away from the moving block 53, i.e. make the limiting block 22 tightly attached to the inner bottom wall of the toggle hole 531; when the transmission shaft 2 is inserted into the second mounting hole 41, as shown in fig. 4 or 5, the toggle member 52 toggles downward, the toggle end 521 pushes against the inner bottom wall of the toggle hole 531, so that the moving block 53 descends, the transmission shaft 2 descends accordingly, if the transmission shaft 2 is not aligned with the second mounting hole 41 at this time, the end of the transmission shaft 2 abuts against the end surface of the second transmission wheel 4, the second elastic member 23 keeps the transmission shaft 2 in a trend of moving downward, and when the transmission shaft 2 is driven by the first driver 1 to rotate, the transmission shaft 2 is aligned with the second mounting hole 41 in the rotating process, so that the transmission shaft 2 is inserted into the second mounting hole 41. In the above process, in order to enable the second elastic member 23 to drive the transmission shaft 2 to eject the insert block 61 from the second mounting hole 41, it is needless to say that the elastic force applied by the second elastic member 23 to the transmission shaft 2 is greater than the elastic force applied by the first elastic member 62 to the insert block 61; the second elastic member 23 is a spring sleeved on the connection cylinder 21.
In the above embodiment, in order to facilitate assembly of the structure, referring to fig. 5, the transmission shaft 2 and the connection cylinder 21 are detachably assembled, the connection cylinder 21 has an external thread, the transmission shaft 2 is provided with a connection hole 24, and the connection cylinder 21 is in threaded connection with the connection hole 24. In this way, the depth of the connecting cylinder 21 entering the connecting hole 24 can be adjusted by rotating the connecting cylinder 21, so as to adjust the overall length of the transmission shaft 2 and the connecting cylinder 21 after combination; when the size of the produced part has errors, the whole length of the combined transmission shaft 2 and the connecting column 21 can be adjusted, so that the poking piece 52 can completely move the transmission shaft 2 out of the second mounting hole 41; the structure has strong adaptability, can reduce the requirement on the precision of the size of the part and is convenient to produce.
In the above embodiment, in order to facilitate the rotation of the connecting cylinder 21, referring to fig. 5 and 6, the moving block 53 is provided with a second through hole 533 arranged along the axial direction, and the second through hole 533 is communicated with the toggle hole 531; the first through hole 532 and the second through hole 533 are respectively located at two sides corresponding to the toggle hole 531; the width of the stopper 22 is smaller than the second through hole 533; the end face of the limiting block 22 is provided with a screwing structure; an escape structure 522 is formed at the toggle end 521 of the toggle piece 52, so that an unobstructed installation path is formed between the first through hole 532 and the second through hole 533. Therefore, on one hand, the assembly of the connecting cylinder 21 and the moving block 53 is facilitated, and on the other hand, a tool such as a screwdriver can be directly inserted into the installation path between the first through hole 532 and the second through hole 533, and the connecting cylinder 21 is directly rotated by the screwing structure on the limiting block 22, so that the adjustment of the overall length of the combined transmission shaft 2 and the connecting cylinder 21 is more convenient. The first through hole 532 and the second through hole 533 may be formed directly in the moving block 53, or may be formed indirectly in the moving block 53 by another member.
In the above embodiment, in order to facilitate the first driving wheel 3 and the second driving wheel 4 to rotate smoothly, referring to fig. 2, the first driving wheel 3 and the second driving wheel 4 are rotatably disposed in the housing 7 through a bearing, and the positions of the first driving wheel 3 and the second driving wheel 4 in the housing 7 are fixed; in addition, in order to facilitate the first driver 1 to drive the transmission shaft 2 to rotate, referring to fig. 1, 2 and 3, the first driver 1 is connected with a driving gear 11, a driven gear 12 is slidably sleeved on the transmission shaft 2, and the transmission shaft 2 and the driven gear 12 form a circumferential transmission structure; the driving gear 11 is meshed with the driven gear 12; the driven gear 12 is rotatably provided in the housing 7 by a bearing, and the position of the driven gear 12 in the housing 7 is fixed. The driven gear 12 and the first driving wheel 3 may be integrally formed.
In addition, referring to fig. 1, a curtain machine is shown, which includes any one of the above-mentioned dual belt transmission structures.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A dual belt drive structure, comprising:
the transmission shaft is driven by the first driver to rotate;
the axle center of the first driving wheel is provided with a first mounting hole which is used for being in sliding sleeve joint with the transmission shaft, and the first mounting hole and the transmission shaft form circumferential transmission connection;
a second mounting hole which is used for being in sliding sleeve connection with the transmission shaft is formed in the axis position of the second driving wheel, and the second mounting hole is in circumferential transmission connection with the transmission shaft;
the control mechanism comprises a second driver, a shifting piece and a moving block, the shifting piece is driven by the second driver to rotate, the shifting piece extends out of a shifting end along the radial direction, and the moving block and the transmission shaft form a connecting structure which is relatively fixed in the axial direction and can relatively rotate in the circumferential direction; a toggle hole is concavely arranged on the side surface of the moving block, and the toggle end is inserted into the toggle hole; the poking end drives the moving block to move axially, so that the transmission shaft is driven to move axially, and the transmission shaft is only inserted into the first mounting hole or is inserted into the first mounting hole and the second mounting hole simultaneously;
the self-locking component comprises an insertion block and a first elastic piece for driving the insertion block to be inserted into the second mounting hole; when the transmission shaft is separated from the second mounting hole, the inserting block is inserted into the second mounting hole.
2. The double-belt transmission structure according to claim 1, further comprising a housing, in which a sliding channel for the moving block to move in the axial direction is formed; the moving block and the sliding channel are kept relatively fixed in the circumferential direction.
3. The dual-belt transmission structure as claimed in claim 2, wherein a limiting hole is formed in the housing, the insert block is slidably disposed in the limiting hole, and the insert block and the limiting hole are circumferentially fixed relative to each other; when the inserting block is inserted into the second mounting hole, at least part of the inserting block is still positioned in the limiting hole.
4. The dual-belt transmission structure as claimed in claim 3, wherein the first elastic member is a spring, the first elastic member is located in the limiting hole, one end of the first elastic member abuts against the bottom of the limiting hole, and the other end of the first elastic member abuts against the insert block.
5. The dual-belt transmission structure as claimed in claim 2, wherein the moving block is provided with a first through hole arranged along an axial direction, and the first through hole is communicated with the toggle hole; a connecting cylinder is coaxially arranged at one end of the transmission shaft, the connecting cylinder is slidably sleeved in the first through hole, the end part of the connecting cylinder penetrating through the first through hole is connected with a limiting block, and the width of the limiting block is larger than that of the first through hole; a second elastic piece for driving the transmission shaft and the moving block to keep away from each other is arranged between the transmission shaft and the moving block; the elastic force applied to the transmission shaft by the second elastic piece is larger than the elastic force applied to the insert block by the first elastic piece.
6. The dual belt drive of claim 5, wherein the second elastic member is a spring sleeved on the connecting cylinder.
7. The double-belt transmission structure as claimed in claim 5, wherein the connecting cylinder has an external thread, the transmission shaft is provided with a connecting hole, and the connecting cylinder is threadedly connected with the connecting hole.
8. The dual-belt transmission structure as claimed in claim 7, wherein the moving block is provided with a second through hole arranged along the axial direction, and the second through hole is communicated with the toggle hole; the first through hole and the second through hole are respectively positioned at two corresponding sides of the toggle hole; the width of the limiting block is smaller than that of the second through hole; the end face of the limiting block is provided with a screwing structure; an avoiding structure is formed on the shifting end of the shifting piece, so that an accessible installation path is formed between the first through hole and the second through hole.
9. A dual belt drive as claimed in claim 2, wherein the first drive wheel and the second drive wheel are rotatably disposed within the housing by bearings, the first drive wheel and the second drive wheel being fixed in position within the housing; the first driver is connected with a driving gear, a driven gear is sleeved on the transmission shaft in a sliding manner, and the transmission shaft and the driven gear form a circumferential transmission structure; the driving gear is meshed with the driven gear; the driven gear is rotatably arranged in the shell through a bearing, and the position of the driven gear in the shell is fixed.
10. A curtain machine comprising a dual belt drive arrangement as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220673436.7U CN217301477U (en) | 2022-03-25 | 2022-03-25 | Double-belt transmission structure and curtain machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220673436.7U CN217301477U (en) | 2022-03-25 | 2022-03-25 | Double-belt transmission structure and curtain machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217301477U true CN217301477U (en) | 2022-08-26 |
Family
ID=82935704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220673436.7U Active CN217301477U (en) | 2022-03-25 | 2022-03-25 | Double-belt transmission structure and curtain machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217301477U (en) |
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2022
- 2022-03-25 CN CN202220673436.7U patent/CN217301477U/en active Active
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