CN217390429U - Electric curtain driving structure - Google Patents
Electric curtain driving structure Download PDFInfo
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- CN217390429U CN217390429U CN202122559957.8U CN202122559957U CN217390429U CN 217390429 U CN217390429 U CN 217390429U CN 202122559957 U CN202122559957 U CN 202122559957U CN 217390429 U CN217390429 U CN 217390429U
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Abstract
The utility model provides an electric curtain driving structure, which comprises a driving shell, a transmission component and a driving roller; an accommodating cavity is formed in the driving shell; the transmission assembly comprises a power gear, a transmission gear and a driving gear, the power gear, the transmission gear and the driving gear are sequentially arranged from bottom to top and are meshed, and the power gear is connected with a power output shaft of the curtain motor through a connecting part on the power gear; the driving roller and the driving gear are coaxially fixed with each other, and the driving roller is abutted against the guide sliding rail through the part exposed out of the driving shell. According to the technical scheme, the power gear, the transmission gear and the driving gear are sequentially arranged from bottom to top and are meshed with each other, the power of the curtain motor is output to the driving roller, and the power of the curtain motor acts on the guide slide rail through the abutting effect of the driving roller and the guide slide rail, so that the curtain cloth is driven to open and close, and the curtain cloth has the advantages of being simple in structure, high in transmission efficiency and the like.
Description
Technical Field
The utility model relates to an electric window curtain equipment technical field relates to a drive structure, especially relates to a drive structure that will drive the horizontal motion of curtain cloth on the direction slide rail through the (window) curtain motor.
Background
The curtain is a practical and beautiful daily household article and is usually arranged on doors and windows, and after the curtain cloth is arranged on the guide rail through the sliding mechanism, the curtain cloth is pulled to control the curtain cloth to be opened or closed, so that various functions such as decoration, sunshade, heat insulation, indoor light adjustment and the like are realized. It can be said that curtains are already an indispensable and important part of modern homes.
Depending on the driving mode, curtains can be divided into manual curtains and electric curtains. The traditional manual curtain usually only comprises a curtain cloth, a sliding mechanism and a guide slide rail, wherein the curtain cloth is arranged on the guide slide rail through the sliding mechanism, and the curtain can be opened or closed only by pulling the curtain cloth by hands. Compare in traditional manual formula (window) curtain, modern electrodynamic type (window) curtain structure is more complicated, but the function is also more powerful, and it is more convenient to use: the user can simply control the opening or closing of the curtain by controlling the motor without pulling the curtain cloth by hands. As an important component part of smart homes, it can be said that the popularity of electric curtains is increasing.
The curtain is controlled by driving the curtain cloth to horizontally move on the guide slide rail through the curtain motor, which is one of control schemes of the electric curtain. However, an efficient transmission mechanism is proposed to apply the power of the curtain motor to the guide rail, which is a problem to be solved in the art.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's above-mentioned defect, provides an electric window curtain drive structure, can utilize efficient drive mechanism, acts on the power of (window) curtain motor on the direction slide rail to drive the curtain cloth and open and shut.
The utility model provides a technical scheme that technical problem adopted as follows:
a motorized window treatment drive structure, comprising:
the driving device comprises a driving shell, a driving shaft and a driving shaft, wherein a containing cavity is arranged in the driving shell;
the transmission assembly comprises a power gear, a transmission gear and a driving gear, the power gear, the transmission gear and the driving gear are sequentially arranged from bottom to top and are meshed, and the power gear is connected with a power output shaft of the curtain motor through a connecting part on the power gear;
the driving roller is coaxially fixed with the driving gear, and the driving roller is abutted to the guide sliding rail through the part exposed out of the driving shell.
Compared with the prior art, the technical scheme has the beneficial effects that: the power of the curtain motor is output to the driving roller through the power gear, the transmission gear and the driving gear which are sequentially arranged from bottom to top and are meshed with each other, and the power of the curtain motor acts on the guide slide rail through the abutting action of the driving roller and the guide slide rail, so that the curtain is driven to open and close, and the curtain opening and closing device has the advantages of simple structure, high transmission efficiency and the like.
Further, the drive shell comprises a first shell part and a second shell part, the first shell part and the second shell part form the drive shell through an external connecting piece, and an accommodating cavity is formed between the first shell part and the second shell part;
a roller notch is formed in the upper portion of the first shell portion, and the driving roller is abutted to the guide sliding rail through the roller notch.
The beneficial effect who adopts above-mentioned scheme is: the first shell part and the second shell part form a containing cavity, so that reasonable assembly of internal components of the driving structure can be realized; and be provided with the gyro wheel breach, can effectively guarantee the effective contact of drive gyro wheel and direction slide rail when guaranteeing reasonable assembly, guarantee the security of system operation in-process simultaneously.
Further, the first housing part and the second housing part are both composed of a horizontal part and a vertical part, the accommodating cavity is formed by the horizontal part and the vertical part to form a horizontal cavity and a vertical cavity, and the upper part of the vertical cavity is communicated with the horizontal cavity;
the transmission assembly is arranged in the vertical cavity, and the driving roller is arranged in the horizontal cavity.
The beneficial effect who adopts above-mentioned scheme is: a horizontal cavity and a vertical cavity are formed, so that enough space is conveniently formed for arranging the driving roller, and meanwhile, the transmission assembly is arranged in the vertical cavity in a three-dimensional manner, so that the size of the whole driving structure is favorably reduced.
Further, the sunken slip joint groove that is formed with of lower extreme of first shell portion, drive housing passes through slip joint groove detachably sets up on motor casing.
The beneficial effect who adopts above-mentioned scheme is: the driving shell is detachably arranged on the motor shell through the sliding clamping groove, and the fixed connection between the driving structure and the curtain motor is facilitated to be simplified.
Further, the sliding clamping grooves are provided with two, and the two sliding clamping grooves are respectively arranged on two sides of the lower end of the first shell part.
The beneficial effect who adopts above-mentioned scheme is: the sliding clamping grooves are respectively formed in the two sides of the lower end of the first shell part, so that the driving structure and the curtain motor can be matched more firmly.
Furthermore, the lower ends of the first shell part and the second shell part are respectively provided with a first fastener and a second fastener through protruding parts, and the driving shell is clamped on the motor shell through the first fastener and the second fastener.
The beneficial effect who adopts above-mentioned scheme is: on the basis in slip joint groove, the drive casing still through first buckle spare and second buckle spare joint on motor casing for the structure between drive casing and the casing is more firm.
Further, the cross section of the protrusion part is semicircular.
The beneficial effect who adopts above-mentioned scheme is: the first fastener and the second fastener are clamped by the semicircular protruding parts, so that the assembly between the driving shell and the shell is simplified.
Further, the driving roller comprises a driving roller, a driving inner core and a driving shaft;
the driving roller is of a cylindrical structure, and a plurality of inner grooves are formed in the center of the driving roller along the length direction;
a plurality of external lugs are arranged at one end of the driving inner core, the external lugs correspond to the internal grooves one to one, the driving inner core is arranged in the driving roller through the meshing of the external lugs and the internal grooves, and the driving gear is arranged at the other end of the driving inner core;
the center of the driving inner core is provided with a through hole along the length direction, and the driving inner core is arranged on the driving shaft in a penetrating way through the through hole.
The beneficial effect who adopts above-mentioned scheme is: the curtain driving device can effectively receive power from a power output shaft of a curtain motor, does not need to additionally arrange more gears, and directly controls the driving roller to rotate by taking the driving shaft as a center shaft through the power, so that the curtain cloth is driven to move.
Furthermore, a D-shaped hole is formed in the power gear, and the power gear is connected with a power output shaft of the curtain motor through the D-shaped hole.
The beneficial effect who adopts above-mentioned scheme is: the synchronous motion between the curtain motor and the power gear can be ensured.
Furthermore, elastic pieces are arranged on two sides of the driving shell, the upper ends of the elastic pieces are arranged on the guide sliding rails, and the elastic pieces keep effective contact between the driving idler wheels and the guide sliding rails through elasticity.
The beneficial effect who adopts above-mentioned scheme is: an upward force can be applied to the driving structure through the elastic piece, so that the driving roller is abutted to the guide sliding rail.
Drawings
Fig. 1 is an overall schematic view of the driving structure of the electric curtain of the present invention.
Fig. 2 is an exploded view of the driving structure of the electric curtain of the present invention.
Fig. 3 is a schematic view illustrating the first housing portion and the second housing portion of the driving structure of the electric window curtain of the present invention.
Fig. 4 is a schematic view of a driving gear and a driving roller in the driving structure of the electric window curtain of the present invention.
In the figures, the list of components represented by the various reference numbers is as follows:
the device comprises a driving shell 1, a transmission assembly 2, a driving roller 3 and an elastic piece 4;
a first casing part 101, a second casing part 102, a roller notch 103, a sliding clamping groove 104, a first buckle 105 and a second buckle 106;
a power gear 201, a transmission gear 202 and a driving gear 203;
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", 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 simplification of description, but do not indicate or imply that the device or assembly referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. When an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The specific meaning of the above terms in the present invention can be understood in specific cases for those skilled in the art.
Structurally, the electric curtain mainly comprises a curtain motor, a transmission gear, a curtain cloth and a guide sliding rail. The guide sliding rail is fixedly arranged on the wall, and the curtain cloth is movably arranged on the guide sliding rail through the sliding mechanism; the curtain motor outputs power through the transmission gear, so that the curtain cloth is driven to be opened or closed. Compare in traditional manual formula (window) curtain, modern electrodynamic type (window) curtain structure is more complicated, but the function is also more powerful, and it is more convenient to use: the user can simply control the opening or closing of the curtain by controlling the motor without pulling the curtain cloth by hands. As an important component part of smart homes, it can be said that the popularity of electric curtains is increasing.
The curtain is controlled by driving the curtain cloth to horizontally move on the guide slide rail through the curtain motor, which is one of control schemes of the electric curtain. In short, the curtain motor is arranged on the guide slide rail, and the curtain is directly driven to move by the movement of the curtain motor. The scheme can omit transmission parts between the pull bead chains, and meanwhile, the transmission parts do not need to be additionally installed on the wall, so that the assembly is convenient. However, how to improve the transmission efficiency of the transmission mechanism and make the power of the curtain motor act on the guide rail more efficiently is an urgent problem to be solved in the industry.
As shown in fig. 1 and fig. 2, in order to optimize the efficiency of the transmission mechanism, the present invention provides a driving structure of an electric window curtain, which comprises a driving casing 1, a transmission assembly 2 and a driving roller 3. Specifically, an accommodating cavity is arranged in the driving shell 1, and the accommodating cavity is used for accommodating and installing internal components such as the transmission component 2 and the driving roller 3; the transmission assembly 2 comprises a power gear 201, a transmission gear 202 and a driving gear 203, the power gear 201, the transmission gear 202 and the driving gear 203 are sequentially arranged from bottom to top and are meshed, and the power gear 201 is connected with a power output shaft of a curtain motor through a connecting part on the power gear 201; the driving roller 3 and the driving gear 203 are coaxially fixed, and the driving roller 3 abuts against a guide slide rail through a portion exposed out of the driving housing 1.
The innovation point of the technical scheme is that the power of the curtain motor is transmitted upwards through the power gear 201, the transmission gear 202 and the driving gear 203 which are sequentially arranged from bottom to top and are meshed with each other, so that the rotation of the driving roller 3 is controlled. The driving roller 3 abuts against the guide rail through the portion exposed out of the driving housing 1, so that the driving roller 3 generates a motion relative to the guide rail due to the action of friction force during the rotation process.
Therefore, the power gear 201, the transmission gear 202 and the driving gear 203 which are sequentially arranged from bottom to top and are meshed are utilized, the power of the curtain motor is output to the driving roller 3, and the power of the curtain motor acts on the guide sliding rail through the driving roller 3, so that the curtain cloth is driven to open and close, and the curtain cloth opening and closing device has the advantages of simple structure, high transmission efficiency and the like.
The driving structure has more internal components, and the assembly process is more complicated; meanwhile, in the working process, the internal components such as the power gear 201, the transmission gear 202 and the driving gear 203 move, once foreign matters enter, the internal components are easily blocked, and even potential safety hazards appear, so that the internal components are required to be isolated from the external environment, and the driving roller 3 cannot abut against the guide sliding rail.
As shown in fig. 2 and 3, in order to solve the above problem, the drive housing 1 includes a first housing part 101 and a second housing part 102, the drive housing 1 is composed between the first housing part 101 and the second housing part 102 through an external connection member, and a receiving cavity is formed; a roller gap 103 is formed above the first casing portion 101, and the driving roller 3 abuts against the guide sliding rail through the roller gap 103.
The accommodating cavity is formed by the first casing part 101 and the second casing part 102, reasonable assembly of internal components of the driving structure can be realized, the power gear 201, the transmission gear 202 and the driving gear 203 are assembled to form the whole of the transmission component 2, then the transmission component 2 is fixed on the first casing part 101 or the second casing part 102, the first casing part 101 and the second casing part 102 are further assembled together to form the driving casing 1, and installation can be completed. Meanwhile, as the roller notch 103 is formed above the first casing part 101, a part of the driving roller 3 is exposed through the roller notch 103 and contacts with the guide slide rail, so that the driving roller 3 can effectively contact with the guide slide rail on the premise of ensuring reasonable assembly, and the safety of the system in the operation process is ensured.
In this technical scheme, the effect of drive structure is that drive curtain cloth moves, and when curtain cloth moved, drive structure also can be at the motion of direction on the direction slide rail. To avoid that the driving structure hits other people or objects during movement, the volume of the driving structure should be as small as possible. Meanwhile, the technical scheme generates relative motion based on the friction force between the driving roller 3 and the guide slide rail, and for ensuring the driving force, the driving roller 3 needs a larger volume to ensure that the contact area between the driving roller 3 and the guide slide rail is large enough, so that larger friction force is provided. The two working principles and design requirements are contradictory.
As shown in fig. 2 and 3, preferably, in order to solve the above-mentioned contradiction, another innovative point of the present technical solution is that the first housing part 101 and the second housing part 102 are both composed of a horizontal part and a vertical part, the receiving cavity is formed with a horizontal cavity and a vertical cavity by the horizontal part and the vertical part, and the upper part of the vertical cavity is communicated with the horizontal cavity; drive assembly 2 set up in the vertical cavity, drive roller 3 set up in the horizontal cavity.
Through the structural feature of horizontal part and vertical portion, be formed with horizontal cavity and vertical cavity in drive housing 1, be convenient for be formed with sufficient space in horizontal cavity and be used for the installation to set up drive roller 3 to set up drive assembly 2 in vertical cavity from bottom to top three-dimensionally, when guaranteeing that the area of contact between drive roller 3 and the direction slide rail is enough big, can also reduce whole drive structure's volume, thereby above-mentioned contradiction is solved ingeniously.
As shown in fig. 2 and 3, a sliding clamping groove 104 is concavely formed at the lower end of the first housing part 101, and the driving housing 1 is detachably disposed on the motor housing through the sliding clamping groove 104. Note that the components in fig. 3 are in an upside-down state.
Accordingly, the connection between the drive housing 1 and the motor housing can be efficiently achieved only by providing the motor housing with a structure corresponding to the slide engaging groove 104. The specific installation process is as follows: the structure butt joint that will slide joint groove 104 on the drive shell 1 and motor casing is in the same place, then exerts thrust on drive shell 1, goes into completely to slide joint groove 104 card, can accomplish the installation. Based on the structure, the driving shell 1 is detachably arranged on the motor shell through the sliding clamping groove 104, which is beneficial to simplifying the fixed connection between the driving structure and the curtain motor.
Specifically, two sliding clamping grooves 104 are provided, and the two sliding clamping grooves 104 are respectively provided on two sides of the lower end of the first casing part 101. The two sides of the lower end of the first shell part 101 are respectively provided with a sliding clamping groove 104, so that the matching between the driving structure and the curtain motor is firmer.
As shown in fig. 3, in combination with the sliding snap-in groove 104, the lower ends of the first casing part 101 and the second casing part 102 form a first snap-in piece 105 and a second snap-in piece 106 through protrusions, and the driving casing 1 is snapped onto the motor casing through the first snap-in piece 105 and the second snap-in piece 106. On the basis of the sliding clamping groove 104, the driving shell 1 is clamped on the motor shell through the first clamping piece 105 and the second clamping piece 106, so that the structure between the driving shell 1 and the motor shell is firmer.
Specifically, the cross section of the protrusion is semicircular. The formation of the first catch 105 and the second catch 106 by a semicircular projection facilitates the assembly between the drive housing 1 and the housing. In the process of installation or disassembly, the driving shell 1 and the shell can be clamped together or separated from each other by using the semicircular protruding parts with only slight force.
As shown in fig. 4, another innovative point of the present technical solution is that the driving roller 3 includes a driving roller 301, a driving core 302 and a driving shaft 303.
The driving roller 301 is of a cylindrical structure, and a plurality of inner grooves 304 are formed in the center of the driving roller 301 along the length direction; one end of the driving inner core 302 is provided with a plurality of external lugs 305, the external lugs 305 correspond to the internal grooves 304 one by one, the driving inner core 302 is arranged in the driving roller 301 through the meshing of the external lugs 305 and the internal grooves 304, and the driving gear 203 is arranged at the other end of the driving inner core 302; a through hole is formed in the center of the driving inner core 302 along the length direction, and the driving inner core 302 is arranged on the driving shaft 303 through the through hole.
The driving roller 301 and the driving inner core 302 are engaged with each other through the corresponding inner grooves 304 and the corresponding outer protrusions 305 to form a whole, and the whole is arranged on the driving shaft 303 through the through hole in the center of the driving inner core 302, so that the installation is completed. When the transmission gear 202 is driven, the whole body composed of the driving roller 301 and the driving core 302 is driven to rotate around the driving shaft 303.
Based on the above structure, especially, the driving gear 203 is arranged on the driving inner core 302, so that the power from the power output shaft of the curtain motor can be effectively received, and meanwhile, no more gears are additionally arranged, the power is directly provided through the driving gear 203, and the driving roller 301 is controlled to rotate by taking the driving shaft 303 as the central axis, so that the curtain cloth is driven to move.
As shown in fig. 2, a D-shaped hole is formed in the power gear 201, and the power gear 201 is connected to a power output shaft of the curtain motor through the D-shaped hole. Correspondingly, the cross section of the power output shaft of the curtain motor is also of a D-shaped structure. Therefore, only the power output shaft is required to be sleeved into the D-shaped hole, when the curtain motor works, the power output shaft rotates, and the synchronous movement between the curtain motor and the power gear 201 can be ensured through the arrangement of the D-shaped hole.
In the process of implementing the technical scheme, one of the key points lies in keeping the driving roller 3 to be effectively abutted against the guide slide rail, and only so, the driving roller 3 can generate friction force with the guide slide rail when being transported, and then moves relative to the guide slide rail.
As shown in fig. 2, in order to ensure effective abutting between the driving roller 3 and the guide rail, two sides of the driving casing 1 are provided with elastic members 4, the upper ends of the elastic members 4 are arranged on the guide rail, and the elastic members 4 maintain effective contact between the driving roller 3 and the guide rail through elastic force.
The upper end of elastic component 4 sets up on the guide slide rail, and elastic component 4 can apply an ascending elasticity to drive roller 3 constantly, and this elasticity can make drive roller 3 can keep constantly the butt on the guide slide rail to the normal work of drive structure among this technical scheme has been guaranteed.
It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.
Claims (10)
1. A motorized window treatment drive structure, comprising:
the driving device comprises a driving shell, a driving shaft and a driving shaft, wherein a containing cavity is arranged in the driving shell;
the transmission assembly comprises a power gear, a transmission gear and a driving gear, the power gear, the transmission gear and the driving gear are sequentially arranged from bottom to top and are meshed, and the power gear is connected with a power output shaft of the curtain motor through a connecting part on the power gear;
the driving roller is coaxially fixed with the driving gear, and the driving roller is abutted to the guide sliding rail through the part exposed out of the driving shell.
2. The motorized window treatment driving structure as claimed in claim 1, wherein the driving housing comprises a first housing part and a second housing part, the first housing part and the second housing part constitute the driving housing through an external connecting member therebetween and form a receiving cavity;
a roller notch is formed in the upper portion of the first shell portion, and the driving roller is abutted to the guide sliding rail through the roller notch.
3. The motorized window treatment driving structure according to claim 2, wherein the first and second housing portions are each composed of a horizontal portion and a vertical portion, the accommodating cavity is formed with a horizontal cavity and a vertical cavity by the horizontal portion and the vertical portion, and an upper portion of the vertical cavity is communicated with the horizontal cavity;
the transmission assembly is arranged in the vertical cavity, and the driving roller is arranged in the horizontal cavity.
4. The electric window curtain driving structure as claimed in claim 2, wherein the lower end of the first housing portion is recessed to form a sliding engagement groove, and the driving housing is detachably mounted on the motor housing through the sliding engagement groove.
5. The driving structure of electric window curtain as claimed in claim 4, wherein there are two sliding engaging grooves, and the two sliding engaging grooves are respectively disposed on two sides of the lower end of the first housing portion.
6. The structure of claim 5, wherein the lower ends of the first and second housing portions are formed with a first and second latch through protrusions, respectively, and the driving housing is latched to the motor housing through the first and second latches.
7. The motorized window treatment drive of claim 6, wherein the protrusion is semi-circular in cross-section.
8. The motorized window treatment drive structure of claim 1, wherein the drive roller comprises a drive roller cylinder, a drive core, and a drive shaft;
the driving roller is of a cylindrical structure, and a plurality of inner grooves are formed in the center of the driving roller along the length direction;
a plurality of external lugs are arranged at one end of the driving inner core, the external lugs correspond to the internal grooves one to one, the driving inner core is arranged in the driving roller through the meshing of the external lugs and the internal grooves, and the driving gear is arranged at the other end of the driving inner core;
the center of the driving inner core is provided with a through hole along the length direction, and the driving inner core is arranged on the driving shaft in a penetrating way through the through hole.
9. The electric window curtain driving structure as claimed in any one of claims 1 to 8, wherein the power gear is provided with a D-shaped hole, and the power gear is connected to a power output shaft of the window curtain motor through the D-shaped hole.
10. The driving structure of a motorized window treatment as claimed in any one of claims 1 to 8, wherein the driving housing is provided at both sides thereof with elastic members, the upper ends of the elastic members are disposed on the guide rails, and the elastic members maintain the driving roller in effective contact with the guide rails by means of elastic force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122559957.8U CN217390429U (en) | 2021-10-22 | 2021-10-22 | Electric curtain driving structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122559957.8U CN217390429U (en) | 2021-10-22 | 2021-10-22 | Electric curtain driving structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217390429U true CN217390429U (en) | 2022-09-09 |
Family
ID=83131738
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122559957.8U Active CN217390429U (en) | 2021-10-22 | 2021-10-22 | Electric curtain driving structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217390429U (en) |
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2021
- 2021-10-22 CN CN202122559957.8U patent/CN217390429U/en active Active
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