CN217210698U - Slip angle test equipment - Google Patents
Slip angle test equipment Download PDFInfo
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- CN217210698U CN217210698U CN202220219052.8U CN202220219052U CN217210698U CN 217210698 U CN217210698 U CN 217210698U CN 202220219052 U CN202220219052 U CN 202220219052U CN 217210698 U CN217210698 U CN 217210698U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
The utility model relates to a smoothness angle test equipment in product package test technical field, it includes fixed platform, the moving platform who sets up at the fixed platform top, moving platform's one end is rotated with fixed platform's one end and is connected, and moving platform and fixed platform's articulated axis level set up and with fixed platform's length direction mutually perpendicular, be provided with one between fixed platform and the moving platform and be used for driving moving platform around moving platform and the articulated axis pivoted drive assembly of fixed platform, be provided with on the moving platform and be used for dismantling the fixed subassembly of fixing at the moving platform upper surface with first specimen, the moving platform top still is provided with and is used for opening the slider of second specimen butt at first specimen upper surface, fixed platform installs one side and is used for carrying out the angular ruler that surveys to contained angle between moving platform and the fixed platform. This application has improved the efficiency of software product sliding angle's test.
Description
Technical Field
The application relates to the technical field of product package testing, in particular to a slip angle testing device.
Background
With the development of science and technology, at present, many manufacturers of products mostly adopt automated assembly lines or mechanical equipment in the processes of packing, carrying and conveying products, for example, the products are stacked and then carried by a forklift, or the products are conveyed to a warehouse by an assembly line conveyor belt after being packed, if the surfaces of the cartons are too smooth (the static friction coefficient is small and the sliding angle is small), the phenomena of collision, sliding and the like between the cartons are easy to occur in the conveying process, so that the articles in the cartons are damaged, therefore, in order to ensure a certain friction coefficient between the cartons, the articles are not easy to slide between the cartons and the boxes or between the cartons and the cartons in the processes of conveying, carrying and storing the cartons, and the surface friction coefficient of the cartons or the cartons is required to be larger than a set value.
Therefore, the sliding angle is an important performance index of a packaged product, most packaging manufacturers can detect the sliding angle when leaving a factory at present, and the sliding angle is mainly tested for finished products such as cartons or paper boxes at present, so that the testing equipment is generally large, the operation is inconvenient, and the testing efficiency of the sliding angle of the product is reduced.
SUMMERY OF THE UTILITY MODEL
In order to improve the efficiency of the test of product slip angle, this application provides a slip angle test equipment.
The application provides a smoothness angle test equipment adopts following technical scheme:
the utility model provides a smooth degree angle test equipment, including fixed platform, the moving platform of setting at the fixed platform top, moving platform's one end is rotated with fixed platform's one end and is connected, and moving platform and fixed platform's articulated axis level set up and with fixed platform's length direction mutually perpendicular, be provided with one between fixed platform and the moving platform and be used for driving moving platform around moving platform and fixed platform articulated axis pivoted drive assembly, the last fixed subassembly that is used for can dismantling the fixing at the moving platform upper surface with first sample that is provided with of moving platform, the moving platform top still is provided with and is used for opening the slider of butt at first sample upper surface with the second sample, fixed platform one side has installed one and has been used for carrying out the bevel protractor of survey to contained angle between moving platform and the fixed platform.
Through adopting above-mentioned technical scheme, when the sliding angle of needs to the product is tested, the staff at first uses drive assembly to rotate moving platform to horizontality, then tailor out first sample and second sample, use fixed subassembly to fix first sample at the moving platform top, paste the second sample in the slider bottom, and place the slider on moving platform, make second sample and first sample butt each other, afterwards can open drive assembly and make the slow slope of moving platform, open when second sample and slider are first relative and begin to take place the gliding in the twinkling of an eye, the staff uses the scale to note the angle of moving platform relatively fixed platform at this moment, be the sliding angle of product promptly, overall structure is simple, and convenient operation, thereby the efficiency of the test of sliding angle has been improved.
Optionally, the upper surface of the fixed platform is provided with a first mounting groove along the length direction of the fixed platform, a second mounting groove is arranged on one side of the movable platform facing the fixed platform along the length direction of the movable platform, the driving component comprises a screw rod arranged along the length direction of a first mounting groove, a motor for driving the screw rod to rotate is arranged at one end of the screw rod in the first mounting groove, a sliding block is also arranged in the first mounting groove, the screw rod penetrates through the sliding block and is in threaded connection with the sliding block, a supporting rod is arranged between the sliding block and the second mounting groove, two ends of the supporting rod are respectively rotatably connected with the sliding block and the second mounting groove, and the hinge axis of the support rod, the sliding block and the second mounting groove is parallel to the hinge axis of the movable platform and the fixed platform, when the movable platform and the fixed platform are both in a horizontal state, the two ends of the supporting rod are close to the two ends, far away from the first mounting groove and the second mounting groove, of the first mounting groove and the second mounting groove respectively.
Through adopting above-mentioned technical scheme, when needs rotate moving platform, the staff only need open the motor and make motor drive screw rotate, drive the sliding block along the length direction motion of screw rod in first mounting groove, can make the bracing piece rotate and rotate moving platform, stable in structure has improved rotating efficiency and stability to moving platform.
Optionally, a barrier strip is fixed on the upper surface of the moving platform near the rotary joint of the moving platform and the fixed platform, and the barrier strip is arranged along the width direction of the moving platform.
Through adopting above-mentioned technical scheme, the setting of blend stop has avoided the slider roll-off outside moving platform, makes things convenient for the staff to retrieve the slider, has avoided the slider to table surface's collision damage moreover.
Optionally, the barrier strip is an elastic barrier strip.
Through adopting above-mentioned technical scheme, elastic blend stop can play the effect of buffering to the slider, has improved the holistic protection to the slip degree angle test equipment.
Optionally, the sliding angle testing device further includes a controller, a light emitter and a light receiver, wherein the controller is in signal connection with the light receiver and is electrically connected with the motor, the light emitter and the light receiver are installed at the top of the mobile platform and are respectively located on two sides of the slider, the slider blocks the light path when passing through the light path between the light emitter and the light receiver, and the controller receives a switch control signal output by the light receiver and controls the motor to be turned off.
Through adopting above-mentioned technical scheme, when the slider takes place to slide and remove very little distance, the slider can block and receive the receipt of light ware to illuminator transmitted light, and the on-off control signal and the control motor that receive the output of light ware are received to the simultaneous control ware and are closed, make moving platform stall in the twinkling of an eye to make things convenient for the accurate reading of staff more.
Optionally, the fixing assembly includes two pressing plates, the pressing plates are arranged along the length direction of the moving platform, the two pressing plates are respectively located on two sides of the sliding block, and two sliding assemblies for driving the corresponding pressing plates to move along the thickness direction of the moving platform and to be locked at set positions are respectively arranged on two sides of the moving platform.
Through adopting above-mentioned technical scheme, when needs fix first specimen at the moving platform top, the staff at first lays first specimen on moving platform, makes two clamp plates press respectively on two long edges of first specimen, then uses the subassembly that slides to make the clamp plate downstream, until the clamp plate tightly fix first specimen between clamp plate and moving platform, simple structure simple operation has improved the fixed efficiency of first specimen on moving platform.
Optionally, the sliding assembly comprises a mounting plate fixed on the side wall of the mobile platform, the mounting plate is arranged along the length direction of the mobile platform, a sliding plate is arranged at the top of the mounting plate, the sliding plate is connected with the mobile platform in a sliding manner along the thickness direction of the mobile platform and towards one side of the mobile platform, a plurality of connecting rods are connected between the sliding plate and the pressing plate, a locking bolt is arranged on one side of the sliding plate, which is far away from the fixed plate, and the end part of the locking bolt penetrates through the sliding plate and is in threaded connection with the fixed plate.
Through adopting above-mentioned technical scheme, revolve and twist two locking bolts downwards, under the threaded connection of locking bolt and mounting panel to under the slide plate is spacing to the bearing of locking bolt head, the locking bolt will drive the slide plate downstream, thereby drives connecting rod and clamp plate downstream, makes the clamp plate fix first type, and stable in structure has improved first type and has opened the stationary stability on moving platform.
Optionally, an elastic pad is attached to one side of the pressing plate, which faces the moving platform.
Through adopting above-mentioned technical scheme, when pressing from both sides tight between clamp plate and moving platform with first exemplar, the cushion can receive the pressure and produce deformation, has increased the frictional action to first exemplar.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the testing efficiency of the sliding angle is improved, the moving platform is rotated to the horizontal state by using the driving assembly, then a first sample sheet and a second sample sheet are cut out, the first sample sheet is fixed at the top of the moving platform by using the fixing assembly, the second sample sheet is pasted at the bottom of the sliding block, the sliding block is placed on the moving platform, the second sample sheet and the first sample sheet are abutted against each other, then the driving assembly can be started to slowly incline the moving platform, and when the second sample sheet and the sliding block are opened relative to the first sample sheet and start to slide, a worker records the angle of the moving platform relative to the fixing platform at the moment by using the graduated scale, namely the sliding angle of the product is obtained;
2. the fixed efficiency of first specimen page on moving platform has been improved, lays first specimen page on moving platform through opening first specimen page, makes two clamp plates press respectively on two long edges of first specimen page, then uses the subassembly that slides to make the clamp plate downstream, fixes first specimen page between clamp plate and moving platform until the clamp plate is tight, and simple structure simple operation and fixed stability are high.
Drawings
FIG. 1 is a schematic view of the overall structure of a slip angle testing apparatus according to an embodiment of the present application;
FIG. 2 is a schematic structural view showing a fixing member;
FIG. 3 is a schematic structural diagram embodying a drive assembly;
fig. 4 is a schematic view of a structure embodying a barrier strip.
Description of reference numerals: 1. a first proof sheet; 2. a second proof sheet; 3. a fixed platform; 31. a first mounting groove; 4. a mobile platform; 41. a second mounting groove; 5. a drive assembly; 51. a screw; 52. a motor; 53. a sliding block; 54. a support bar; 55. a controller; 56. a light emitter; 57. a light receiver; 6. a fixing assembly; 61. pressing a plate; 62. mounting a plate; 63. a sliding plate; 64. a connecting rod; 65. locking the bolt; 66. an elastic pad; 7. a slider; 71. a through hole; 8. an angle ruler; 9. blocking strips; 91. a cushion pad.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses a slip angle testing device. Referring to fig. 1, the slip angle testing apparatus is used for testing a sliding angle between two samples of a product, wherein one fixed sample is a first sample 1, and the other sample which slides relative to the fixed sample is a second sample 2, the slip angle testing apparatus comprises a fixed platform 3, a movable platform 4 is arranged at the top of the fixed platform 3, the fixed platform 3 and the movable platform 4 are both in a rectangular plate shape, the fixed platform 3 is horizontally arranged, one end of the movable platform 4 is rotatably connected with one end of the fixed platform 3 through a hinge, a hinge axis of the movable platform 4 and the fixed platform 3 is horizontally arranged and is perpendicular to a length direction of the fixed platform 3, a driving assembly 5 for driving the movable platform 4 to rotate around the hinge axis of the movable platform 4 and the fixed platform 3 is arranged between the fixed platform 3 and the movable platform 4, a fixed assembly 6 for detachably fixing the first sample 1 on the upper surface of the movable platform 4 is arranged on the movable platform 4, the top of the movable platform 4 is also provided with a slide block 7 for abutting the second specimen sheet 2 on the upper surface of the first specimen sheet 1, and one side of the fixed platform 3 is provided with an angle ruler 8 for measuring an included angle between the movable platform 4 and the fixed platform 3.
Referring to fig. 2 and 3, the fixing assembly 6 includes two rectangular pressing plates 61, each pressing plate 61 is disposed along the length direction of the moving platform 4, the second sheet 2 is adhered to the lower surface of the sliding block 7 and placed on the moving platform 4, the two pressing plates 61 are respectively disposed at two sides of the sliding block 7, a mounting plate 62 disposed along the length direction of the moving platform 4 is respectively fixed on the two opposite side walls of the moving platform 4, a sliding plate is respectively disposed above each mounting plate 62, one side of the sliding plate facing the moving platform 4 is connected with the corresponding side wall of the moving platform 4 in a sliding manner, the sliding direction of the sliding plate and the side wall of the moving platform 4 is disposed along the thickness direction of the moving platform 4, two connecting rods 64 are respectively connected between each sliding plate and the corresponding pressing plate 61, the two connecting plates are respectively close to two ends of the corresponding pressing plates 61, one side of each sliding plate 63 facing away from the corresponding fixing plate is respectively provided with a locking bolt 65, the end of the locking bolt 65 passes downwardly through the corresponding slide plate 63 and is threadedly coupled to the mounting plate 62.
When the first specimen 1 needs to be fixed on the top of the moving platform 4, a worker firstly lays the first specimen 1 on the moving platform 4, and makes the two pressing plates 61 respectively press the two long edges of the first specimen 1, then the worker screws the two locking bolts 65 downwards, under the threaded connection of the locking bolts 65 and the mounting plate 62, and under the bearing limit of the sliding plate on the heads of the locking bolts 65, the locking bolts 65 drive the sliding plate to move downwards, so as to drive the connecting rod 64 and the pressing plates 61 to move downwards, until the two long edges of the first specimen 1 are tightly clamped between the pressing plates 61 and the moving platform 4, so as to fix the first specimen 1 on the moving platform 4; in addition, an elastic pad 66 is respectively attached to one side of each pressure plate 61 facing the moving platform 4, and when the first specimen sheet 1 is clamped between the pressure plate 61 and the moving platform 4, the elastic pads 66 are pressed to deform, so that the friction effect on the first specimen sheet 1 is increased, and the fixation of the first specimen sheet 1 on the moving platform 4 is more stable.
Referring to fig. 2 and 3, a first mounting groove 31 has been seted up along the length direction of fixed platform 3 to the upper surface of fixed platform 3, a second mounting groove 41 has been seted up along the length direction of moving platform 4 to the lower surface of moving platform 4, drive assembly 5 is including setting up the screw rod 51 in first mounting groove 31, screw rod 51 arranges along the length direction of first mounting groove 31, and screw rod 51 is close to moving platform 4 and fixed platform 3 and rotates the one end of junction and the corresponding lateral wall of first mounting groove 31 and rotate and be connected, a motor 52 has been installed to the other end that lies in screw rod 51 in first mounting groove 31, the output shaft of motor 52 and screw rod 51 are coaxial fixed in order to be used for driving screw rod 51 to rotate.
Referring to fig. 2 and 3, a rectangular sliding block 53 is further disposed in the first mounting groove 31, the bottom of the sliding block 53 abuts against the bottom wall of the first mounting groove 31, and the two longer side walls of the first mounting groove 31 are respectively abutted against the corresponding side walls of the sliding block 53, the screw 51 passes through the sliding block 53 and is in threaded connection with the sliding block 53, when the motor 52 drives the screw 51 to rotate, can drive the sliding block 53 to move in the first installation groove 31 along the length direction of the screw 51, a supporting rod 54 is arranged between the sliding block 53 and the second installation groove 41, two ends of the supporting rod 54 are respectively rotatably connected with the sliding block 53 and the second installation groove 41, and the hinge axis of the support rod 54 with the sliding block 53 and the second mounting groove 41 is parallel to the hinge axis of the moving platform 4 with the fixed platform 3, when the movable platform 4 and the fixed platform 3 are both in a horizontal state and abut against each other, two ends of the support rod 54 are respectively close to two ends of the first installation groove 31 and the second installation groove 41 which are far away from each other.
When the sliding angle of a product needs to be tested, a worker can firstly start the motor 52 to rotate the mobile platform 4 to a horizontal state, then cut out two paper boards which are respectively a first sample sheet 1 and a second sample sheet 2, wherein the first sample sheet 1 is fixed at the top of the mobile platform 4 by using the two pressing plates 61, the second sample sheet 2 is pasted at the bottom of the sliding block 7, the sliding block 7 is placed on the mobile platform 4, the second sample sheet 2 is abutted against the first sample sheet 1, then the worker can start the motor 52 again to enable the motor 52 to rotate reversely, the screw rod 51 is driven to rotate to drive the sliding block 53 to move towards a direction far away from a hinge point of the mobile platform 4 and the fixed platform 3, so that the mobile platform 4 is slowly inclined, when the second sample sheet 2 and the sliding block 7 start to slide relative to the first sample sheet 1, the worker records the angle of the mobile platform 4 relative to the fixed platform 3 by using the graduated scale, the sliding angle of the product is the sliding angle, the whole structure is simple, the operation is convenient, and therefore the sliding angle testing efficiency is improved.
Referring to fig. 4, a barrier strip 9 is further fixed on the upper surface of the moving platform 4, the barrier strip 9 is arranged along the width direction of the moving platform 4, the barrier strip 9 is close to the rotating connection position of the moving platform 4 and the fixed platform 3, when the sliding block 7 slides downwards, the barrier strip 9 blocks the sliding block 7, so that the sliding block 7 is prevented from sliding out of the moving platform 4, the sliding block is convenient for workers to recover, and the sliding block 7 is prevented from collision damage to the working table; in addition, an elastic cushion pad 91 is further attached to one side, facing the sliding block 7, of the barrier strip 9, so that when the sliding block 7 collides with the barrier strip 9, the cushion pad 91 can play a role in buffering the sliding block 7, and the overall protection of the sliding degree angle testing equipment is improved.
Referring to fig. 2 and 4, a controller 55 is further installed in the first installation groove 31 on one side of the motor 52, a light emitter 56 is fixed on the top of a pressing plate 61 on the back side of the slider 7, a light receiver 57 is fixed on the other pressing plate 61 of the slider 7, which is away from the light emitter 56, at a position corresponding to the light emitter 56, the slider 7 is provided with a through hole 71 for the light path of the light emitter 56 to pass through, and the controller 55 is in signal connection with the light receiver 57 and is electrically connected with the motor 52; when slider 7 takes place to slide and moves very little distance, through hole 71 on the slider 7 staggers with illuminator 56's light path, thereby block and receive the receipt of illuminator 57 to illuminator 56 light, controller 55 receives the on-off control signal of receiving the output of illuminator 57 and controls motor 52 and closes, later the staff can read out the contained angle between moving platform 4 and the fixed platform 3 this moment, be the sliding angle of product promptly, through closing motor 52 in the twinkling of an eye, make moving platform 4 stop the rotation of relatively fixed platform 3, thereby make things convenient for the accurate reading of staff more.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. A kind of slip angle test equipment, characterized by that: the movable platform comprises a fixed platform (3), a movable platform (4) is arranged at the top of the fixed platform (3), one end of the movable platform (4) is rotatably connected with one end of the fixed platform (3), the movable platform (4) is horizontally arranged with a hinge axis of the fixed platform (3) and is perpendicular to the length direction of the fixed platform (3), a driving component (5) used for driving the movable platform (4) to rotate around the hinge axis of the movable platform (4) and the fixed platform (3) is arranged between the fixed platform (3) and the movable platform (4), a fixed component (6) used for detachably fixing a first specimen (1) on the upper surface of the movable platform (4) is arranged on the movable platform (4), a sliding block (7) used for abutting a second specimen (2) on the upper surface of the first specimen (1) is further arranged at the top of the movable platform (4), and an included angle formed between the movable platform (4) and the fixed platform (3) is formed on one side of the fixed platform (3) And a measuring angle ruler (8).
2. A slip angle testing apparatus according to claim 1, wherein: the upper surface of the fixed platform (3) is provided with a first mounting groove (31) along the length direction of the fixed platform (3), one side of the movable platform (4) facing the fixed platform (3) is provided with a second mounting groove (41) along the length direction of the movable platform (4), the driving component (5) comprises a screw rod (51) arranged along the length direction of the first mounting groove (31), one end of the screw rod (51) in the first mounting groove (31) is provided with a motor (52) for driving the screw rod (51) to rotate, the first mounting groove (31) is also internally provided with a sliding block (53), the screw rod (51) passes through the sliding block (53) and is in threaded connection with the sliding block (53), a supporting rod (54) is arranged between the sliding block (53) and the second mounting groove (41), and two ends of the supporting rod (54) are respectively in rotating connection with the sliding block (53) and the second mounting groove (41), and the hinge axis of bracing piece (54) and sliding block (53) and second mounting groove (41) is on a parallel with the hinge axis of moving platform (4) and fixed platform (3) when moving platform (4) and fixed platform (3) all are the horizontality, the both ends of bracing piece (54) are close to the both ends department of keeping away from mutually of first mounting groove (31) and second mounting groove (41) respectively.
3. A slip angle testing apparatus according to claim 2, wherein: a barrier strip (9) is fixed on the upper surface of the moving platform (4) close to the rotating connection position of the moving platform (4) and the fixed platform (3), and the barrier strip (9) is arranged along the width direction of the moving platform (4).
4. A slip angle testing apparatus according to claim 3, wherein: the barrier strip (9) is an elastic barrier strip (9).
5. A slip angle testing apparatus according to claim 2, wherein: the sliding angle testing equipment further comprises a controller (55), a light emitter (56) and a light receiver (57), wherein the controller (55) is in signal connection with the light receiver (57) and is electrically connected with the motor (52), the light emitter (56) and the light receiver (57) are arranged on the top of the moving platform (4) and are respectively located on two sides of the sliding block (7), the sliding block (7) blocks a light path when passing through the light path between the light emitter (56) and the light receiver (57), and the controller (55) receives an on-off control signal output by the light receiver (57) and controls the motor (52) to be turned off.
6. A slip angle testing apparatus according to claim 1, wherein: the fixed assembly (6) comprises two pressing plates (61), the pressing plates (61) are arranged along the length direction of the movable platform (4), the two pressing plates (61) are respectively located on two sides of the sliding block (7), and two sides of the movable platform (4) are respectively provided with a sliding assembly which is used for driving the corresponding pressing plates (61) to move along the thickness direction of the movable platform (4) and lock the sliding assemblies at set positions.
7. A slip angle testing apparatus according to claim 6, wherein: the sliding assembly comprises a mounting plate (62) fixed on the side wall of the moving platform (4), the mounting plate (62) is arranged along the length direction of the moving platform (4), a sliding plate (63) is arranged at the top of the mounting plate (62), the sliding plate (63) slides towards one side of the moving platform (4) and the moving platform (4) along the thickness direction of the moving platform (4), a plurality of connecting rods (64) are connected between the sliding plate (63) and the pressing plate (61), a locking bolt (65) is arranged on one side of the sliding plate (63) departing from the fixed plate, and the end part of the locking bolt (65) penetrates through the sliding plate (63) and is in threaded connection with the fixed plate.
8. A slip angle testing apparatus according to claim 7, wherein: and an elastic pad (66) is attached to one side, facing the moving platform (4), of the pressing plate (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220219052.8U CN217210698U (en) | 2022-01-25 | 2022-01-25 | Slip angle test equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220219052.8U CN217210698U (en) | 2022-01-25 | 2022-01-25 | Slip angle test equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217210698U true CN217210698U (en) | 2022-08-16 |
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ID=82793223
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220219052.8U Active CN217210698U (en) | 2022-01-25 | 2022-01-25 | Slip angle test equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217210698U (en) |
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2022
- 2022-01-25 CN CN202220219052.8U patent/CN217210698U/en active Active
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