CN114457716A - Warning device for construction site - Google Patents
Warning device for construction site Download PDFInfo
- Publication number
- CN114457716A CN114457716A CN202210259524.7A CN202210259524A CN114457716A CN 114457716 A CN114457716 A CN 114457716A CN 202210259524 A CN202210259524 A CN 202210259524A CN 114457716 A CN114457716 A CN 114457716A
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- China
- Prior art keywords
- rod
- square
- clamping
- fixed cylinder
- fixedly connected
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010276 construction Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 62
- 230000037431 insertion Effects 0.000 claims abstract description 38
- 238000003780 insertion Methods 0.000 claims abstract description 38
- 238000009435 building construction Methods 0.000 claims abstract description 10
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000003351 stiffener Substances 0.000 description 3
- 238000000151 deposition Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
- E01F9/604—Upright bodies, e.g. marker posts or bollards; Supports for road signs specially adapted for particular signalling purposes, e.g. for indicating curves, road works or pedestrian crossings
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
- E01F9/623—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01F—ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE
- E01F9/00—Arrangement of road signs or traffic signals; Arrangements for enforcing caution
- E01F9/60—Upright bodies, e.g. marker posts or bollards; Supports for road signs
- E01F9/623—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection
- E01F9/65—Upright bodies, e.g. marker posts or bollards; Supports for road signs characterised by form or by structural features, e.g. for enabling displacement or deflection with rotatable, swingable or adjustable signs or signals
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Level Indicators Using A Float (AREA)
Abstract
The invention discloses a building construction site warning device, which belongs to the field of buildings and comprises a warning plate and a water tank; the water tank is filled with water, and a fixed cylinder is vertically embedded in the water tank in a penetrating manner; the fixed cylinder is internally provided with an inserting rod in a sliding manner, and the outer side of the fixed cylinder is provided with a clamping mechanism; a plurality of clamping grooves are uniformly formed in the outer side of the insertion rod from top to bottom; the clamping mechanism is clamped with a clamping groove on the insertion rod to fix the insertion rod on the inner side of the fixed cylinder; the warning board is arranged at the top of the insertion rod. The warning device for the construction site can effectively solve the problem that the existing warning board is easy to blow down in windy weather, and is simple in structure, very convenient to manufacture, use and carry and high in practicability.
Description
Technical Field
The invention belongs to the field of buildings, and relates to a warning device for a building construction site.
Background
At present, building construction site warning device is mostly the warning sign, and the warning sign is erect through the support and is used subaerial often, has written the warning label on the warning sign, warns and reminds through the warning sign to personnel and the vehicle through building construction region to prevent the emergence of incident. However, when the warning board is used and meets the strong wind weather, the warning board is easy to blow down, the normal use of the warning board is influenced, and the potential safety hazard is further caused.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a warning device for a building construction site, which effectively solves the problem that the existing warning board is easy to be blown down in windy weather.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention relates to a warning device for a building construction site, which comprises a warning plate and a water tank; the water tank is filled with water, and a fixed cylinder is vertically inserted in the water tank; the fixed cylinder is internally provided with an inserting rod in a sliding way, and the outer side of the fixed cylinder is provided with a clamping mechanism; a plurality of clamping grooves are uniformly formed in the outer side of the insertion rod from top to bottom; the clamping mechanism is clamped with a clamping groove on the insertion rod to fix the insertion rod on the inner side of the fixed cylinder; the warning board is arranged at the top of the insertion rod.
Furthermore, the fixed cylinder is a square cylinder or a cylinder, and the insertion rod is a square rod or a round rod matched with the fixed cylinder.
Furthermore, the clamping mechanism comprises a connecting seat, a cam, a spring, a square sleeve and a clamping rod; the square sleeve is fixedly connected to the side face of the fixed cylinder, the outer end face of the square sleeve is fixedly connected with the connecting seat, the surface of the inner wall of the square sleeve is connected with the clamping rod in a sliding mode, a square groove is formed in the inner wall of the square sleeve below the clamping rod, and a fixed shaft is arranged on the inner wall of the connecting seat; the cam is sleeved outside the fixed shaft, the surface of the cam is fixedly connected with a handle, and the handle extends to the outer side of the connecting seat; one end of the clamping rod is movably connected with the surface of the cam, the other end of the clamping rod penetrates through the fixed cylinder and is clamped with a clamping groove in the insertion rod to fix the insertion rod, the bottom of the clamping rod is fixedly connected with a square block, and the square block is in sliding connection with the inner wall of the square groove; and two ends of the spring are respectively and fixedly connected with the side surface of the square block and the side surface of the inner wall of the square groove.
Furthermore, the end part of the clamping rod is provided with an inclined plane, and the shape of the clamping groove is matched with that of the clamping rod.
Further, the water tank comprises a tank body, and the bottom of the fixed cylinder penetrates through the top of the tank body and is connected with the inner bottom wall of the tank body.
Furthermore, the inner wall of the box body is fixedly connected with a plurality of reinforcing rods, and the other end of each reinforcing rod is fixedly connected with the side face of the fixed cylinder.
Furthermore, the upper surface and the bottom side of the box body are respectively provided with a water inlet and a water outlet, the water inlet is in threaded connection with a round cover, and the water outlet is in threaded connection with a drainage bolt.
Further, the support includes square ring and cross bar, square ring fixed connection is at the top of peg graft pole, cross bar fixed connection is at the inner wall of square ring, the surface of warning board respectively with the fixed surface connection of square ring and cross bar.
Furthermore, the bottom of the square ring is fixedly connected with an inclined stay bar, and the end part of the inclined stay bar is fixedly connected with the side surface of the insertion rod.
Compared with the prior art, the warning device for the construction site has the following advantages:
1. according to the warning device for the building construction site, the water tank, the fixed cylinder, the inserting rod and the support are arranged, when the warning device is used, the fixed cylinder is embedded on the water tank, the inserting rod is clamped in the fixed cylinder through the clamping mechanism, the warning plate is fixed on the support at the top of the inserting rod, water is filled in the water tank to increase the weight of the water tank, the water tank is a warning plate base, the weight of the water tank is increased by filling water in the water tank, the effect of effectively preventing strong wind from blowing down the warning board is achieved, the normal use of the warning board cannot be influenced, and the problem that in the prior art, when the warning board is used in the building construction site in strong wind weather, the warning board is easily blown down by strong wind, and the normal use of the warning board is influenced is solved.
2. The warning device for the building construction site is provided with the clamping mechanism, when the warning device is used and the height of the warning plate needs to be adjusted, the cam is rotated to ensure that the cam does not extrude the clamping rod, the clamping rod is separated from the clamping groove under the action of the elastic force of the spring, the square bar can be moved upwards or downwards, the square bar drives the warning board to move through the bracket, the height of the warning board is adjusted, the cam is rotated reversely after the warning board is adjusted to the proper height, the convex part of the cam extrudes the clamping bar, the clamping bar is inserted into the corresponding clamping groove at the moment, the height of the warning board can be fixed by clamping the square rod, the height of the warning board can be adjusted to adapt to different use requirements, can fall to warning board height to minimumly when transporting and depositing the warning board to put out water from the water tank through the drainage bolt on the water tank, reduce warning board area occupied and reduce water tank weight, make things convenient for the transportation and the storage of warning board.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic right sectional view of the position of the insertion rod of the present invention;
FIG. 3 is a schematic front cross-sectional view of the position of the bayonet rod of the present invention;
FIG. 4 is an enlarged view of the latch mechanism of the present invention;
in the figure: 1. a warning board; 2. a water tank; 201. a box body; 202. a dome; 203. a drain bolt; 3. a fixed cylinder; 4. a plug rod; 5. a support; 501. a square ring; 502. a cross bar; 503. a diagonal brace; 6. a clamping mechanism; 601. a connecting seat; 602. a cam; 603. a spring; 604. a square sleeve; 605. a clamping rod; 606. a handle; 607. a square block; 608. a square groove; 7. a card slot; 8. a reinforcing rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer" and the like used in the specification and claims of the present disclosure are used only to indicate relative positional relationships, and when the absolute position of a described object is changed, the relative positional relationships are changed accordingly; the terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The present invention is not described in detail, but is known to those skilled in the art.
Example 1:
as shown in fig. 1-4, the warning device for the construction site comprises a warning board 1 and a water tank 2, wherein warning slogans are written on the warning board 1; the water tank 2 is filled with water, and a fixed cylinder 3 vertically penetrates through and is embedded in the water tank 2; the fixed cylinder 3 is internally provided with an inserting rod 4 in a sliding way, and the outer side of the fixed cylinder is provided with a clamping mechanism 6; a plurality of clamping grooves 7 are uniformly formed in the outer side of the insertion rod 4 from top to bottom; the clamping mechanism 6 is clamped with a clamping groove 7 on the insertion rod 4 to fix the insertion rod 4 on the inner side of the fixed cylinder 3, and is used for fixing the insertion rod 4 with the fixed cylinder 3 after the height of the insertion rod 4 is adjusted; the warning board 1 is arranged at the top of the insertion rod 4.
In this embodiment, the fixed cylinder 3 is a square cylinder or a circular cylinder, and the insertion rod 4 is a square rod or a circular rod matched with the fixed cylinder 3, so that the material can be conveniently taken and manufactured.
In this embodiment, the clamping mechanism 6 includes a connecting seat 601, a cam 602, a spring 603, a square sleeve 604 and a clamping rod 605; the square sleeve 604 is fixedly connected to the side surface of the fixed cylinder 3, the outer end surface of the square sleeve is fixedly connected with the connecting seat 601, the surface of the inner wall of the square sleeve is connected with the clamping rod 605 in a sliding manner, a square groove 608 is formed in the inner wall of the square sleeve 604 below the clamping rod 605, and a fixed shaft is arranged on the inner wall of the connecting seat 601; the cam 602 is sleeved outside the fixed shaft, the surface of the cam is fixedly connected with a handle 606, and the handle 606 extends to the outer side of the connecting seat 601; one end of the clamping rod 605 is movably connected with the surface of the cam 602, the other end of the clamping rod penetrates through the fixed cylinder 3 and is clamped with a clamping groove 7 on the insertion rod 4 to fix the insertion rod 4, the bottom of the clamping rod is fixedly connected with a square block 607, and the square block 607 is in sliding connection with the inner wall of the square groove 608; two ends of the spring 603 are respectively fixedly connected with the side surface of the square 607 and the side surface of the inner wall of the square groove 608.
In this embodiment, an inclined plane is disposed at an end of the clamping rod 605, and the shape of the clamping groove 7 is matched with that of the clamping rod 605, so that the clamping rod 605 can be conveniently inserted into the clamping groove 7, and the square rod 4 can be conveniently clamped.
The water tank 2 comprises a tank body 201, and the bottom of the fixed cylinder 3 penetrates through the top of the tank body 201 and is connected with the inner bottom wall of the tank body 201.
In this embodiment, a plurality of stiffeners 8 are fixedly connected to the inner wall of the box 201, the other end of each stiffener 8 is fixedly connected to the side of the fixed cylinder 3, and the stiffener 8 is used for increasing the contact area between the square cylinder 3 and the box 201, so that the square cylinder 3 is fixed more stably and firmly.
In this embodiment, the upper surface and the bottom side of the box 201 are respectively provided with a water inlet and a water outlet, the water inlet is in threaded connection with the round cover 202, the water outlet is in threaded connection with the drainage bolt 203, the round cover 202 is opened to inject water into the water tank 2, and the drainage bolt 203 is opened to discharge water in the water tank 2.
In this embodiment, the support 5 includes square ring 501 and cross bar 502, square ring 501 fixed connection is at the top of peg graft pole 4, cross bar 502 fixed connection is at the inner wall of square ring 501, the surface of warning board 1 respectively with the fixed surface of square ring 501 and cross bar 502 be connected, warning board 1 is fixed on square ring 501 and cross bar 502 to it is firm more stable to be fixed with warning board 1. Furthermore, the bottom of the square ring 501 is fixedly connected with an inclined strut 503, the end of the inclined strut 503 is fixedly connected with the side of the insertion rod 4, and the arrangement of the inclined strut 503 increases the contact area between the square ring 501 and the insertion rod 4, so that the square ring 501 is fixed more firmly and stably.
In this embodiment, when the height of the warning board 1 needs to be adjusted, the cam 602 is rotated to prevent the cam 602 from extruding the bayonet 605, the block 607 drives the bayonet 605 to move leftward along the inner wall of the square sleeve 604 under the elastic force of the spring 603, the bayonet 605 is separated from the slot 7, i.e., the insertion rod 4 can move upward or downward, the insertion rod 4 moves upward or downward along the inner wall of the fixed cylinder 3, the insertion rod 4 drives the warning board 1 to move through the bracket 5, the height of the warning board 1 is adjusted, the cam 602 is rotated reversely after the proper height is adjusted to enable the protruding portion of the cam 602 to extrude the bayonet 605, the bayonet 605 moves rightward and is inserted into the corresponding slot 7, and the height of the warning board 1 can be fixed by clamping the insertion rod 4.
When the warning board is used, the fixed cylinder 3 is embedded on the water tank 2, the reinforcing rod 8 is fixed in the box body 201 of the water tank 2, the contact area between the fixed cylinder 3 and the box body 201 is increased, so that the fixed cylinder 3 is more stably and firmly fixed, the insertion rod 4 is clamped in the fixed cylinder 3 through the clamping mechanism 6, the warning board 1 is fixed on the support 5 at the top of the insertion rod 4, the water tank 2 is filled with water to increase the weight of the water tank 2, the water tank 2 is a base of the warning board 1, the weight of the water tank 2 is increased by filling water in the water tank 2, and the warning board is effectively prevented from being blown down by strong wind; when the height of the warning board 1 needs to be adjusted, the cam 602 is rotated to enable the cam 602 to extrude the clamping rod 605, the block 607 drives the clamping rod 605 to move leftwards along the inner wall of the square sleeve 604 under the elastic force of the spring 603, the clamping rod 605 is separated from the clamping groove 7, the inserting rod 4 can move upwards or downwards, the inserting rod 4 moves upwards or downwards along the inner wall of the fixed cylinder 3, the inserting rod 4 drives the warning board 1 to move through the bracket 5, the height of the warning board 1 is adjusted, the cam 602 is rotated reversely after being adjusted to the proper height to enable the protruding part of the cam 602 to extrude the clamping rod 605, the clamping rod 605 moves rightwards and is inserted into the corresponding clamping groove 7 at the moment, the height of the warning board 1 can be fixed by clamping the square rod 4, different use requirements can be met by adjusting the height of the warning board 1, the height of the warning board 1 can be reduced to the lowest when the warning board is transported and stored, and water is discharged from the water tank 2 through the drainage bolt 203 on the water tank 2, reduce warning sign area occupied and reduce 2 weights of water tank, make things convenient for the transportation and the depositing of warning sign.
Claims (9)
1. Building construction scene warning device, its characterized in that: comprises a warning board (1) and a water tank (2); the water tank (2) is filled with water, and a fixed cylinder (3) vertically penetrates through and is embedded in the water tank; the fixed cylinder (3) is internally provided with an inserting rod (4) in a sliding way, and the outer side of the fixed cylinder is provided with a clamping mechanism (6); a plurality of clamping grooves (7) are uniformly formed in the outer side of the insertion rod (4) from top to bottom; the clamping mechanism (6) is clamped with a clamping groove (7) on the insertion rod (4) to fix the insertion rod (4) on the inner side of the fixed cylinder (3); the warning board (1) is arranged at the top of the insertion rod (4).
2. The construction site warning device according to claim 1, wherein: the fixed cylinder (3) is a square cylinder or a cylinder, and the insertion rod (4) is a square rod or a round rod matched with the fixed cylinder (3).
3. The construction site warning device according to claim 1 or 2, wherein: the clamping mechanism (6) comprises a connecting seat (601), a cam (602), a spring (603), a square sleeve (604) and a clamping rod (605); the square sleeve (604) is fixedly connected to the side face of the fixed cylinder (3), the outer end face of the square sleeve is fixedly connected with the connecting seat (601), the surface of the inner wall of the square sleeve is connected with the clamping rod (605) in a sliding mode, a square groove (608) is formed in the inner wall of the square sleeve (604) below the clamping rod (605), and a fixed shaft is arranged on the inner wall of the connecting seat (601); the cam (602) is sleeved outside the fixed shaft, the surface of the cam is fixedly connected with a handle (606), and the handle (606) extends to the outer side of the connecting seat (601); one end of the clamping rod (605) is movably connected with the surface of the cam (602), the other end of the clamping rod penetrates through the fixed cylinder (3), is clamped with a clamping groove (7) in the insertion rod (4) and fixes the insertion rod (4), the bottom of the clamping rod is fixedly connected with a square block (607), and the square block (607) is in sliding connection with the inner wall of the square groove (608); two ends of the spring (603) are respectively and fixedly connected with the side surface of the square block (607) and the side surface of the inner wall of the square groove (608).
4. The construction site warning device according to claim 3, wherein: the end part of the clamping rod (605) is provided with an inclined plane, and the shape of the clamping groove (7) is matched with that of the clamping rod (605).
5. The construction site warning device according to claim 1 or 2, wherein: the water tank (2) comprises a tank body (201), and the bottom of the fixed cylinder (3) penetrates through the top of the tank body (201) and is connected with the inner side bottom wall of the tank body (201).
6. The construction site warning device according to claim 5, wherein: the inner wall of the box body (201) is fixedly connected with a plurality of reinforcing rods (8), and the other end of each reinforcing rod (8) is fixedly connected with the side face of the fixed cylinder (3).
7. The construction site warning device according to claim 6, wherein: the upper surface and the bottom side surface of the box body (201) are respectively provided with a water inlet and a water outlet, the water inlet is in threaded connection with a round cover (202), and the water outlet is in threaded connection with a drainage bolt (203).
8. The construction site warning device according to claim 6 or 7, wherein: the support (5) comprises a square ring (501) and a cross rod (502), the square ring (501) is fixedly connected to the top of the inserting rod (4), the cross rod (502) is fixedly connected to the inner wall of the square ring (501), and the surface of the warning plate (1) is fixedly connected with the surfaces of the square ring (501) and the cross rod (502) respectively.
9. The construction site warning device according to claim 8, wherein: the bottom of the square ring (501) is fixedly connected with an inclined strut (503), and the end part of the inclined strut (503) is fixedly connected with the side surface of the insertion rod (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210259524.7A CN114457716A (en) | 2022-03-16 | 2022-03-16 | Warning device for construction site |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210259524.7A CN114457716A (en) | 2022-03-16 | 2022-03-16 | Warning device for construction site |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114457716A true CN114457716A (en) | 2022-05-10 |
Family
ID=81416811
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210259524.7A Pending CN114457716A (en) | 2022-03-16 | 2022-03-16 | Warning device for construction site |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114457716A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204570293U (en) * | 2015-03-31 | 2015-08-19 | 贵州顺立达纺织科技有限公司 | A kind of adjustable height textile fabric dehydrator |
| CN205769526U (en) * | 2016-06-08 | 2016-12-07 | 昆山威凯儿童用品有限公司 | The handle expansion regulating mechanism of doll carriage |
| CN107761588A (en) * | 2017-09-29 | 2018-03-06 | 刘城 | A kind of road construction alarming device |
| CN208330924U (en) * | 2018-05-12 | 2019-01-04 | 宁海云途电子有限公司 | A kind of flexible lock adjustment mechanism |
| CN112576584A (en) * | 2020-12-08 | 2021-03-30 | 东阳市优至工贸有限公司 | Push type adjusting and locking device of telescopic rod |
| CN215862425U (en) * | 2021-06-22 | 2022-02-18 | 宁波沱沱河设计有限公司 | Telescopic assembly and main frame |
-
2022
- 2022-03-16 CN CN202210259524.7A patent/CN114457716A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204570293U (en) * | 2015-03-31 | 2015-08-19 | 贵州顺立达纺织科技有限公司 | A kind of adjustable height textile fabric dehydrator |
| CN205769526U (en) * | 2016-06-08 | 2016-12-07 | 昆山威凯儿童用品有限公司 | The handle expansion regulating mechanism of doll carriage |
| CN107761588A (en) * | 2017-09-29 | 2018-03-06 | 刘城 | A kind of road construction alarming device |
| CN208330924U (en) * | 2018-05-12 | 2019-01-04 | 宁海云途电子有限公司 | A kind of flexible lock adjustment mechanism |
| CN112576584A (en) * | 2020-12-08 | 2021-03-30 | 东阳市优至工贸有限公司 | Push type adjusting and locking device of telescopic rod |
| CN215862425U (en) * | 2021-06-22 | 2022-02-18 | 宁波沱沱河设计有限公司 | Telescopic assembly and main frame |
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Application publication date: 20220510 |
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| RJ01 | Rejection of invention patent application after publication |