CN212743455U - Floor enclosure door of construction elevator - Google Patents
Floor enclosure door of construction elevator Download PDFInfo
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- CN212743455U CN212743455U CN202020819632.1U CN202020819632U CN212743455U CN 212743455 U CN212743455 U CN 212743455U CN 202020819632 U CN202020819632 U CN 202020819632U CN 212743455 U CN212743455 U CN 212743455U
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Abstract
The utility model provides a construction elevator's floor encloses and protects door belongs to rotatory lift protective apparatus technical field. The floor enclosure door of the construction elevator comprises a ceiling, a support, a first movable door and an impurity cleaning piece. The utility model provides a first support column can be supported to first base, avoids first support column to empty, and the second base can support column second support column, avoids the second support column to empty, and the support supports the ceiling, and the ceiling bears the debris that fall from lift or house, and debris clearance spare is cleared up debris from the ceiling, improves cleaning efficiency, avoids debris accumulation on the ceiling too much and crushes the ceiling, has improved equipment life.
Description
Technical Field
The utility model belongs to the technical field of rotatory lift protective apparatus, a door is enclosed to construction elevator's floor is related to.
Background
Along with the increasing of high-rise buildings, construction elevators are widely applied in construction, when the construction elevators are used, sundries on the construction elevators drop off, if protective equipment is not arranged below the construction elevators, the sundries are easy to injure people to cause accidents, meanwhile, the sundries are accumulated on a ceiling, and if the total weight of the sundries which are not cleaned for a long time is gradually increased, the ceiling is crushed.
Chinese patent CN 207092583U discloses a protection canopy for lift, including ceiling and the stand that is used for supporting the ceiling, it has the connecting window to open on the ceiling, and the ceiling below is equipped with the protection ladder that links to each other with the connecting window, and the ceiling top is equipped with the guide arm that sets up along ceiling length direction and the guide arm links firmly in the stand and wears out the ceiling part, and sliding connection has a protection frame that can follow the staff and remove on the guide arm. Through setting up protection ladder and protection frame, not only make the clearance of staff to the ceiling more convenient, and can reduce the clearance in-process staff and by the possibility that debris pound. The debris on the ceiling can't be cleared up effectively in the above-mentioned patent, need the staff to take the protection frame to the ceiling just can clear up debris simultaneously, and cleaning efficiency is relatively poor.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the above-mentioned problem that prior art exists, provide construction elevator's floor enclosure door, the utility model aims to solve the technical problem that: how to provide a floor covering door of a construction elevator.
The purpose of the utility model can be realized by the following technical proposal:
construction elevator's floor enclosure door, including the ceiling, be used for supporting the support of ceiling, set up in the first dodge gate of support one end, set up in the debris clearance piece of ceiling upper end, the support includes first support column, second support column, connecting rod, sets up in the first base of first support column bottom, sets up in the second base of second support column bottom, connecting rod one end is connected in first support column, the other end and is connected in the second support column, the length of first support column equals the length of second support column, the equal vertical setting of first support column, second support column.
Preferably, the number of the first supporting columns, the number of the second supporting columns and the number of the connecting rods are the same, and the number of the first supporting columns is at least 2.
Preferably, the ceiling comprises a first bearing plate arranged on the connecting rod, a second bearing plate arranged at the upper end of the first bearing plate, and a first spring, wherein one end of the first spring is connected to the first bearing plate, and the other end of the first spring is connected to the second bearing plate.
Preferably, first support column top is equipped with first screw, second support column top is equipped with the second screw, connecting rod one end is equipped with first mounting hole, the other end is equipped with the second mounting hole, first loading board one end is equipped with the third mounting hole, the other end is equipped with the fourth mounting hole, still includes first bolt, second bolt, first bolt one end runs through in proper order in third mounting hole, first mounting hole and spiro union in first screw, second bolt one end runs through in proper order in fourth mounting hole, second mounting hole and spiro union in the second screw.
Preferably, the sundry cleaning piece comprises a first stop plate arranged at one end of the second bearing plate, a second stop plate arranged at the other end of the second bearing plate, an extension plate, a door locking structure used for preventing sundries falling on the second bearing plate from sliding to the extension plate, and a first pushing structure used for pushing the sundries falling on the second bearing plate to the extension plate when the door locking structure is opened, wherein the first stop plate is parallel to the second stop plate, the first pushing structure is arranged between the first stop plate and the second stop plate, the extension plate is connected to the second bearing plate, and the first pushing structure and the door locking structure are arranged relatively.
Preferably, the first pushing structure comprises a first hydraulic cylinder and a push plate, the push plate is arranged between the first stop plate and the second stop plate, and one end of the push plate is fixed on a first piston rod of the first hydraulic cylinder.
Preferably, the length of the second bearing plate is smaller than that of the first bearing plate, the length of the first stop plate is equal to that of the second stop plate, the length of the first stop plate is smaller than that of the second bearing plate, the first hydraulic cylinder is arranged on the first bearing plate, and the push plate is arranged at the upper end of the second bearing plate.
Preferably, the first pushing structure further comprises a first housing for protecting the first hydraulic cylinder, the first housing is fixed on the first bearing plate, and a fifth mounting hole for the first piston rod to penetrate through is formed in the first housing.
Preferably, the door locking structure comprises a first fixing plate connected to one end of the first stop plate, a second fixing plate connected to one end of the second stop plate, a first accommodating groove formed in the first fixing plate, a second accommodating groove formed in the second fixing plate, a second movable door, a second hydraulic cylinder for pushing the second movable door, a first supporting rod for supporting one end of the second hydraulic cylinder, a second supporting rod for supporting the other end of the second hydraulic cylinder, and a second housing for protecting the second hydraulic cylinder, wherein the first accommodating groove and the second accommodating groove are oppositely arranged, the width of the first fixing plate is equal to that of the first stop plate, the width of the second fixing plate is equal to that of the second stop plate, two ends of the second movable door are respectively sleeved in the first accommodating groove and the second accommodating groove, and a second piston rod of the second hydraulic cylinder is connected to the top end of the second movable door, one end of the first supporting rod is connected to the first stop plate, the other end of the first supporting rod is connected to one end of the second hydraulic cylinder, and one end of the second supporting rod is connected to the second stop plate, and the other end of the second supporting rod is connected to the other end of the second hydraulic cylinder.
Preferably, the two ends of the extension plate are provided with third stop plates.
The utility model provides a beneficial effect: 1. the first base can support the first supporting column to prevent the first supporting column from toppling over, the second base can support the second supporting column to prevent the second supporting column from toppling over, the support supports the ceiling, the ceiling bears sundries falling from the lifter or the house, the sundries cleaning piece cleans the sundries from the ceiling, cleaning efficiency is improved, the ceiling is prevented from being crushed due to excessive accumulation of the sundries on the ceiling, and service life of equipment is prolonged;
2. the number of the first supporting columns, the number of the second supporting columns and the number of the connecting rods are the same, at least 2 first supporting columns are arranged, and the plurality of first supporting columns, the plurality of second supporting columns and the plurality of connecting rods are arranged, so that the stability of the support is improved, and the stability of the ceiling is further improved;
3. sundries fall on the second bearing plate, the second bearing plate is pressed to move downwards, the first spring can reduce the pressure of the second bearing plate, the sundries are prevented from falling to generate larger momentum to impact the second bearing plate to damage the second bearing plate, and the service life of the equipment is prolonged;
4. one end of a first bolt sequentially penetrates through the third mounting hole and the first mounting hole and is in threaded connection with the first screw hole, so that the first supporting column, the connecting rod and the first bearing plate are connected together, one end of a second bolt sequentially penetrates through the fourth mounting hole and the second mounting hole and is in threaded connection with the second screw hole, so that the second supporting column, the connecting rod and the first bearing plate are connected together, the mounting is simple and convenient, and the structure is stable;
5. the first stop plate, the second stop plate and the door locking structure prevent sundries from sliding out of the second bearing plate, when the door locking structure is opened, the first piston rod of the first hydraulic cylinder extends to push the push plate, so that the push plate pushes sundries falling on the second bearing plate to the extension plate, the sundries are conveniently cleaned to the ground, the efficiency is high, after the sundries are cleaned, the first piston rod contracts, and the push plate is pulled to one end of the second bearing plate, so that the sundries can fall on the second bearing plate conveniently;
6. when the second piston rod of the second hydraulic cylinder extends, the second movable door is pushed to move downwards to abut against the second bearing plate, so that sundries are prevented from sliding out of the second bearing plate, the second piston rod contracts to pull the second movable door to move upwards, the second movable door is opened, the sundries can conveniently slide out to the extending plate, and the structure is simple;
7. the third baffle plate can prevent sundries from sliding out of the two ends of the extension plate, and the sundries are prevented from sliding out of the two ends of the extension plate to injure users by crashing.
Drawings
Fig. 1 is a front view of the first stopper plate, the first fixing plate, and the first supporting rod of the present invention, which are omitted;
FIG. 2 is a partial top view of the debris removal member of the present invention;
fig. 3 is a schematic structural diagram of the extension plate of the present invention.
In the figure: 1-a first support column, 11-a first base, 12-a connecting rod, 13-a second support column, 14-a second base, 15-a first movable door, 2-a ceiling, 21-a first bearing plate, 22-a first spring, 23-a second bearing plate, 3-a sundry cleaning piece, 31-a first stop plate, 32-a second stop plate, 33-an extension plate, 331-a third stop plate, 34-a first hydraulic cylinder, 341-a first shell, 35-a push plate, 36-a first fixed plate, 37-a second fixed plate, 38-a second hydraulic cylinder, 381-a second shell, 382-a second support rod, 39-a second movable door.
Detailed Description
The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
Referring to fig. 1, 2, and 3, the floor enclosure door of the construction elevator in this embodiment includes a ceiling 2, a support for supporting the ceiling 2, a first movable door 15 disposed at one end of the support, and an sundry cleaning member 3 disposed at an upper end of the ceiling 2, where the support includes a first support column 1, a second support column 13, a connecting rod 12, a first base 11 disposed at a bottom end of the first support column 1, and a second base 14 disposed at a bottom end of the second support column 13, one end of the connecting rod 12 is connected to the first support column 1, and the other end is connected to the second support column 13, the length of the first support column 1 is equal to the length of the second support column 13, and the first support column 1 and the second support column 13 are both vertically disposed.
Here, first support column 1 can be supported to first base 11, avoids first support column 1 to empty, and second base 14 can support column second support column 13, avoids second support column 13 to empty, and the support supports ceiling 2, and ceiling 2 bears the debris that fall from lift or house, and debris clearance piece 3 clears up debris from ceiling 2, improves cleaning efficiency, avoids debris accumulation on ceiling 2 too much and crushes ceiling 2, has improved equipment life.
The number of the first support columns 1, the number of the second support columns 13 and the number of the connecting rods 12 can be the same, and the number of the first support columns 1 is at least 2. The quantity of first support column 1, the quantity of second support column 13, the quantity of connecting rod 12 are the same, and first support column 1 is 2 at least, sets up a plurality of first support column 1, second support column 13, connecting rod 12, improves the stability of support, further improves the stability of ceiling 2. The first base 11 and the second base 14 have the same shape, the first base 11 can be a square base, the surface area of the first base 11 is increased, thereby reducing the pressure of the first supporting column 1 to the ground and avoiding damaging the ground by applying force to the ground for a long time, the first supporting column 1 and the second supporting column 13 have the same shape, one end of the first movable door 15 is connected with the first supporting column 1 through a hinge, the second supporting column 13 is provided with a first magnet, the other end of the first movable door 15 is provided with a second magnet for adsorbing the first magnet, thus, when the second magnet is attracted to the first magnet, the first movable door 15 is closed, so that the user is prevented from entering the lower part of the lift car of the elevator to cause accidents, when the lift car of the elevator descends to the ground, the first movable door 15 is pulled to separate the second magnet from the first magnet, so that the first movable door 15 is conveniently opened, and a user can conveniently enter the lift car of the elevator.
The ceiling 2 may include a first bearing plate 21 disposed on the connecting rod 12, a second bearing plate 23 disposed on the upper end of the first bearing plate 21, and a first spring 22, wherein one end of the first spring 22 is connected to the first bearing plate 21, and the other end is connected to the second bearing plate 23. Sundries fall on the second bearing plate 23 to press the second bearing plate 23 to move downwards, the first spring 22 can reduce the pressure of the second bearing plate 23, the sundries are prevented from falling to generate large momentum to impact the second bearing plate 23 to damage the second bearing plate 23, and the service life of the equipment is prolonged. The first bearing plate 21 and the second bearing plate 23 can be both horizontally arranged, the first spring 22 can be a spiral cylindrical spring, the number of the first springs 22 can be 4, and the first springs 22 can be arranged at four corners of the bottom of the second bearing plate 23.
The top of the first supporting column 1 can be provided with a first screw hole, the top of the second supporting column 13 is provided with a second screw hole, one end of the connecting rod 12 is provided with a first mounting hole, the other end of the connecting rod is provided with a second mounting hole, one end of the first bearing plate 21 is provided with a third mounting hole, the other end of the first bearing plate is provided with a fourth mounting hole, the mounting structure further comprises a first bolt and a second bolt, one end of the first bolt sequentially penetrates through the third mounting hole, the first mounting hole is connected with the first screw hole in a threaded manner, one end of the second bolt sequentially penetrates through the fourth mounting hole, and the second mounting hole is connected with the second screw. First bolt one end runs through in third mounting hole, first mounting hole and spiro union in first screw in proper order to link together first support column 1, connecting rod 12, first loading board 21, second bolt one end runs through in proper order in fourth mounting hole, second mounting hole and spiro union in the second screw, thereby links together second support column 13, connecting rod 12, first loading board 21, and is simple to handle, and the structure is firm.
The sundry cleaning piece 3 can comprise a first stop plate 31 arranged at one end of the second bearing plate 23, a second stop plate 32 arranged at the other end of the second bearing plate 23, an extension plate 33, a door locking structure used for preventing sundries falling on the second bearing plate 23 from sliding to the extension plate 33, and a first pushing structure used for pushing sundries falling on the second bearing plate 23 to the extension plate 33 when the door locking structure is opened, wherein the first stop plate 31 is parallel to the second stop plate 32, the first pushing structure is arranged between the first stop plate 31 and the second stop plate 32, the extension plate 33 is connected to the second bearing plate 23, and the first pushing structure and the door locking structure are arranged oppositely.
The first pushing structure may include a first hydraulic cylinder 34, and a push plate 35, the push plate 35 being disposed between the first stopper plate 31 and the second stopper plate 32, one end of the push plate 35 being fixed to a first piston rod of the first hydraulic cylinder 34. First backstop board 31, second backstop board 32, the structure of locking the door prevents debris roll-off second loading board 23, the first piston rod extension of first pneumatic cylinder 34 promotes push pedal 35 when the structure of locking the door is opened, make push pedal 35 will fall on debris on second loading board 23 promote to extending plate 33 on, conveniently clear up debris to ground, efficiency is higher, first piston rod shrink after finishing the debris clearance, stimulate push pedal 35 to the one end on the second loading board 23, thereby make things convenient for debris to fall on second loading board 23.
The length of the second bearing plate 23 can be smaller than the length of the first bearing plate 21, the length of the first stop plate 31 is equal to the length of the second stop plate 32, the length of the first stop plate 31 is equal to the length of the second bearing plate 23, the first hydraulic cylinder 34 is disposed on the first bearing plate 21, and the push plate 35 is disposed at the upper end of the second bearing plate 23.
The first pushing structure may further include a first housing 341 for protecting the first hydraulic cylinder 34, the first housing 341 is fixed on the first bearing plate 21, and a fifth mounting hole for allowing the first piston rod to penetrate is formed in the first housing 341, so as to prevent the first hydraulic cylinder 34 from being damaged by falling debris or rain from dripping the first hydraulic cylinder 34. One end of the first housing 341 can be attached to the second bearing plate 23 to prevent the sundries from sliding out of the second bearing plate 23.
The door locking structure may include a first fixing plate 36 connected to one end of the first stopper plate 31, a second fixing plate 37 connected to one end of the second stopper plate 32, a first receiving groove formed in the first fixing plate 36, a second receiving groove formed in the second fixing plate 37, a second movable door 39, a second hydraulic cylinder 38 for pushing the second movable door 39, a first supporting rod for supporting one end of the second hydraulic cylinder 38, a second supporting rod 382 for supporting the other end of the second hydraulic cylinder 38, and a second casing 381 for protecting the second hydraulic cylinder 38, wherein the first receiving groove and the second receiving groove are oppositely disposed, the width of the first fixing plate 36 is equal to the width of the first stopper plate 31, the width of the second fixing plate 37 is equal to the width of the second stopper plate 32, two ends of the second movable door 39 are respectively sleeved in the first receiving groove and the second receiving groove, a second piston rod of the second hydraulic cylinder 38 is connected to a top end of the second movable door 39, one end of the first support rod is connected to the first stopper plate 31, and the other end is connected to one end of the second hydraulic cylinder 38, and one end of the second support rod 382 is connected to the second stopper plate 32, and the other end is connected to the other end of the second hydraulic cylinder 38. When the second piston rod of the second hydraulic cylinder 38 extends, the second movable door 39 is pushed to move downwards to abut against the second bearing plate 23, so that sundries are prevented from sliding out of the second bearing plate 23, the second piston rod contracts to pull the second movable door 39 to move upwards, the second movable door 39 is opened, the sundries can conveniently slide out to the extension plate 33, and the structure is simple. The first stop plate 31 and the second stop plate 32 have the same shape, the first stop plate 31 can be a square stop plate, the first stop plate 31 is perpendicular to the second bearing plate 23, the first fixing plate 36 and the second fixing plate 37 have the same shape, the first fixing plate 36 can be a square fixing plate, the second movable door 39 is a square movable door, the first accommodating groove and the second accommodating groove have the same shape, the first accommodating groove can be a square accommodating groove, the second movable door 39 is vertically arranged, the top end of the inner side wall of the second shell 381 is fixed at the top end of the second hydraulic cylinder 38 through a connecting rod, one end of the second shell 381 is provided with a sixth mounting hole, the other end of the second shell 381 is provided with a seventh mounting hole, one end of the first supporting rod passes through the sixth mounting hole and is fixed at one end of the second hydraulic cylinder 38, the other end of the second supporting plate passes through the seventh mounting hole and is fixed at the other end of the second hydraulic, the second casing 381 prevents the second hydraulic cylinder 38 from being crushed by debris or the second hydraulic cylinder 38 from being drenched by rainwater when debris fall down.
The extension plate 33 may be provided at both ends with third stopper plates 331. The third stopper plate 331 may prevent the sundries from sliding out of the two ends of the extension plate 33, and prevent the sundries from sliding out of the two ends of the extension plate 33 to injure a user, and the extension plate 33 may be an arc-shaped extension plate 33.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (10)
1. Construction elevator's floor encloses guard gate, its characterized in that: including ceiling (2), be used for supporting ceiling (2) the support, set up in first dodge gate (15) of support one end, set up in debris clearance piece (3) of ceiling (2) upper end, the support includes first support column (1), second support column (13), connecting rod (12), sets up in first base (11) of first support column (1) bottom, sets up in second base (14) of second support column (13) bottom, connecting rod (12) one end is connected in first support column (1), the other end is connected in second support column (13), the length of first support column (1) equals the length of second support column (13), the equal vertical setting of first support column (1), second support column (13).
2. A floor-enclosing door of a construction elevator according to claim 1, wherein: the quantity of first support column (1), the quantity of second support column (13), the quantity of connecting rod (12) are the same, first support column (1) is 2 at least.
3. A floor covering door of a construction elevator according to claim 1 or 2, wherein: the ceiling (2) comprises a first bearing plate (21) arranged on the connecting rod (12), a second bearing plate (23) arranged at the upper end of the first bearing plate (21), and a first spring (22), wherein one end of the first spring (22) is connected to the first bearing plate (21), and the other end of the first spring is connected to the second bearing plate (23).
4. A floor-enclosing door of a construction elevator according to claim 3, wherein: first support column (1) top is equipped with first screw, second support column (13) top is equipped with the second screw, connecting rod (12) one end is equipped with first mounting hole, the other end is equipped with the second mounting hole, first loading board (21) one end is equipped with the third mounting hole, the other end is equipped with the fourth mounting hole, still includes first bolt, second bolt, first bolt one end runs through in proper order in third mounting hole, first mounting hole and spiro union in first screw, second bolt one end runs through in proper order in fourth mounting hole, second mounting hole and spiro union in the second screw.
5. A floor-enclosing door of a construction elevator according to claim 3, wherein: sundries clearance piece (3) including set up in first backstop board (31) of second loading board (23) one end, set up in second backstop board (32) of second loading board (23) other end, extension board (33), be used for preventing that sundries that fall on second loading board (23) from sliding to the structure of locking a door on extension board (33), be used for promoting the sundries that fall on second loading board (23) to the first promotion structure of extension board (33) when locking a door structure and opening, first backstop board (31) are on a parallel with second backstop board (32), first promotion structure sets up between first backstop board (31) and second backstop board (32), extension board (33) are connected in second loading board (23), first promotion structure, the structure sets up relatively.
6. A floor covering door of a construction elevator according to claim 5, wherein: the first pushing structure comprises a first hydraulic cylinder (34) and a push plate (35), the push plate (35) is arranged between the first stop plate (31) and the second stop plate (32), and one end of the push plate (35) is fixed on a first piston rod of the first hydraulic cylinder (34).
7. A floor covering door of a construction elevator according to claim 6, wherein: the length of second loading board (23) is less than the length of first loading board (21), the length of first backstop board (31) equals the length of second backstop board (32), the length of first backstop board (31) is less than the length of second loading board (23), first pneumatic cylinder (34) set up on first loading board (21), push pedal (35) set up in second loading board (23) upper end.
8. A floor containment door for a construction hoist as defined in claim 7, wherein: the first pushing structure further comprises a first shell (341) for protecting the first hydraulic cylinder (34), the first shell (341) is fixed on the first bearing plate (21), and a fifth mounting hole for allowing the first piston rod to penetrate through is formed in the first shell (341).
9. A floor containment door for a construction hoist as defined in claim 7, wherein: the door locking structure comprises a first fixing plate (36) connected to one end of a first stop plate (31), a second fixing plate (37) connected to one end of a second stop plate (32), a first accommodating groove arranged on the first fixing plate (36), a second accommodating groove arranged on the second fixing plate (37), a second movable door (39), a second hydraulic cylinder (38) used for pushing the second movable door (39), a first supporting rod used for supporting one end of the second hydraulic cylinder (38), a second supporting rod (382) used for supporting the other end of the second hydraulic cylinder (38), and a second shell (381) used for protecting the second hydraulic cylinder (38), wherein the first accommodating groove and the second accommodating groove are arranged oppositely, the width of the first fixing plate (36) is equal to that of the first stop plate (31), the width of the second fixing plate (37) is equal to that of the second stop plate (32), the two ends of the second movable door (39) are respectively sleeved in the first accommodating groove and the second accommodating groove, a second piston rod of the second hydraulic cylinder (38) is connected to the top end of the second movable door (39), one end of the first supporting rod is connected to the first stop plate (31), the other end of the first supporting rod is connected to one end of the second hydraulic cylinder (38), and one end of the second supporting rod (382) is connected to the second stop plate (32), and the other end of the second supporting rod is connected to the other end of the second hydraulic cylinder (38).
10. A floor covering door of a construction elevator according to claim 5, wherein: and third stop plates (331) are arranged at two ends of the extension plate (33).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020819632.1U CN212743455U (en) | 2020-05-18 | 2020-05-18 | Floor enclosure door of construction elevator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020819632.1U CN212743455U (en) | 2020-05-18 | 2020-05-18 | Floor enclosure door of construction elevator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212743455U true CN212743455U (en) | 2021-03-19 |
Family
ID=75004645
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020819632.1U Active CN212743455U (en) | 2020-05-18 | 2020-05-18 | Floor enclosure door of construction elevator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212743455U (en) |
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2020
- 2020-05-18 CN CN202020819632.1U patent/CN212743455U/en active Active
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