CN110821387A - Ladder with bearing prompt function - Google Patents
Ladder with bearing prompt function Download PDFInfo
- Publication number
- CN110821387A CN110821387A CN201810915594.7A CN201810915594A CN110821387A CN 110821387 A CN110821387 A CN 110821387A CN 201810915594 A CN201810915594 A CN 201810915594A CN 110821387 A CN110821387 A CN 110821387A
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- Prior art keywords
- ladder
- bearing
- load
- foot
- pedal
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- 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.)
- Withdrawn
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- 238000005303 weighing Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims description 3
- 230000001960 triggered effect Effects 0.000 abstract description 2
- 230000006870 function Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 4
- 235000020825 overweight Nutrition 0.000 description 4
- 230000009194 climbing Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 241000425571 Trepanes Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000008447 perception Effects 0.000 description 1
- 210000001364 upper extremity Anatomy 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/14—Ladders capable of standing by themselves
- E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
- E06C1/20—Ladders capable of standing by themselves with hinged struts which rest on the ground with supporting struts formed as poles
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C1/00—Ladders in general
- E06C1/02—Ladders in general with rigid longitudinal member or members
- E06C1/38—Special constructions of ladders, e.g. ladders with more or less than two longitudinal members, ladders with movable rungs or other treads, longitudinally-foldable ladders
- E06C1/39—Ladders having platforms; Ladders changeable into platforms
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/003—Indicating devices, e.g. user warnings or inclinators
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
The invention relates to a ladder with a bearing prompt function, which comprises a ladder, wherein the ladder is also provided with a bearing sensor, a weighing integrated circuit for calculating a bearing sensor signal and a warning device for sending a state signal, the bearing sensor is in signal connection with the weighing integrated circuit, and the warning device is electrically connected with the weighing integrated circuit; the bearing sensor is arranged on the pressure bearing and bearing position of the ladder. This kind of integrated circuit that weighs that possesses bearing prompt facility's ladder is triggered by bearing sensor and starts to, calculate bearing sensor's signal, obtain ladder bearing information, surpass its when injecing bearing capacity after the user climbs the ladder, warning device sends the suggestion, avoids ladder to work under the overload state, and the user is not aware of yet, thereby improves its safety in utilization.
Description
Technical Field
The invention relates to a ladder, in particular to a ladder with a bearing prompt function.
Background
The ladder is used as a tool for assisting the climbing operation, and the safety is a more important aspect. Although ladder load bearing instructions are attached to the ladder or instructions when the ladder product is shipped, the load bearing capacity is a selling point even when the product is sold. However, when the consumer actually uses the ladder, the load-bearing limit of the ladder is easily forgotten due to the characteristic that the using period of the ladder is not frequent, or the ladder has no actual load-bearing prompt, so that the weight of the user who gets on the ladder exceeds the load-bearing limit of the ladder, and the user does not know the load-bearing limit, thereby causing an unexpected risk.
Disclosure of Invention
The invention aims to provide a ladder with a bearing prompt function, which has a simple and reasonable structure, can measure the bearing weight of the ladder and give out a warning, has high safety and overcomes the defects of the prior art.
The purpose of the invention is realized as follows:
the utility model provides a possess bearing prompt facility's ladder utensil, includes ladder utensil, its characterized in that: the ladder is also provided with a load-bearing sensor, a weighing integrated circuit for calculating a load-bearing sensor signal and a warning device for sending a state signal, the load-bearing sensor is in signal connection with the weighing integrated circuit, and the warning device is electrically connected with the weighing integrated circuit; the bearing sensor is arranged on the pressure bearing and bearing position of the ladder. When the ladder bears the weight or begins to bear the weight, the pressure borne by the ladder is transmitted to the bearing sensor, the bearing sensor transmits a trigger signal to the weighing integrated circuit, the weighing integrated circuit calculates the pressure, and when the pressure exceeds the bearing capacity of the ladder, the warning device gives a prompt (of course, the warning can also give a prompt about any bearing state in the use of the ladder).
The aim of the invention can also be solved by the following technical measures:
as a more specific scheme, the load-bearing sensor is arranged at the foot part of the ladder; the ladder comprises a ladder body and anti-skidding foot sleeves, wherein the anti-skidding foot sleeves are arranged at the bottoms of ladder feet of the ladder body, and the anti-skidding foot sleeves and the ladder feet form the feet. Because the foot supports the ladder, when the load-bearing sensor is arranged at the foot of the ladder, the weight of the ladder is increased during the use process, namely the load-bearing sensor can acquire data and feed the data back to the weighing integrated circuit.
As a further proposal, the load-bearing sensor is arranged between the ladder foot and the anti-skid foot sleeve; or the bearing sensor is arranged on the bottom surface of the anti-skidding foot sleeve.
As a further scheme, a sleeve hole is formed in the top of the anti-skid foot sleeve, the inner bottom surface of the sleeve hole is a hard surface (the stress can be better and more intensively transferred to a bearing sensor), the bearing sensor is arranged on the bottom surface of the ladder foot, and the ladder foot is inserted into the sleeve hole and is in telescopic fit with the sleeve hole; the bearing sensor is provided with a fixing frame, a stress sensing element and a contact arm, the stress sensing element is arranged on the fixing frame, the fixing frame is fixedly connected with the bottom surface of the ladder foot, one end of the contact arm is connected with the detection surface of the stress sensing element, and the other end of the contact arm extends out of the bottom surface of the fixing frame and is abutted against the inner bottom surface of the trepanning.
As a further scheme, the load-bearing sensor is arranged at the connection position of the pedals of the ladder; the ladder comprises a ladder body, the ladder body comprises a foot tube and a pedal, the pedal is connected to the foot tube, and the pedal and the connecting part of the pedal and the foot tube form the connecting part of the pedal. The bearing sensor is preferably arranged at the connecting part of the pedal and the foot tube at the lowest part, and the bearing signal of the ladder can be acquired at the first time because the pedal at the lowest part is necessary when climbing the ladder.
As a further proposal, the load-bearing sensor is arranged between the pedal and the foot tube; alternatively, the load bearing sensor is disposed on the top surface of the step.
As a further scheme, the warning device comprises a display screen module and/or a sound playing module; the load-bearing sensor is in signal connection with the weighing integrated circuit through a wire, or the load-bearing sensor is in wireless signal connection with the weighing integrated circuit. The display screen module can display specific weight data, and even can be provided with backlight with different colors, and when the weight is overweight, the display screen module is converted into backlight with stronger warning performance. The sound playing module can play the value of the load bearing measured each time, and can also give out a sound (especially a voice) prompt when the load bearing is overweight. Therefore, the user can sense the using condition of the ladder according to the prompt, the possibility of danger caused by exceeding the bearing limit when the ladder is used is reduced, the additional value of the ladder is increased, and the ladder is used as an electronic scale.
In addition, when the load-bearing sensor is connected with the weighing integrated circuit through a wire, the wire can be wired in the foot tube of the ladder or externally wired and connected with the foot tube, and the method is simple in process and relatively low in cost. Carry out wireless connection through bluetooth or WIFI etc. between load-bearing sensor and the integrated circuit that weighs, the connected mode of ladder utensil and system is simplified completely to this kind of mode, reduces the equipment degree of difficulty.
As a further scheme, the weighing integrated circuit is also electrically connected with a load-bearing data zero-clearing key. The dead weight of the ladder and the weight of other accessories can be removed in a zero clearing mode, so that the trouble caused by misoperation is reduced.
As a further scheme, the weighing integrated circuit is electrically connected with a solar charging panel, and the solar charging panel is arranged on the ladder. In general, the user does not need to consider the situation where the weighing integrated circuit is dead.
As a further scheme, the ladder comprises a left front foot pipe, a right front foot pipe, a left rear foot pipe, a right rear foot pipe, a plurality of pedals and a connecting rod assembly, wherein the upper ends of the left front foot pipe and the right front foot pipe are respectively hinged with the upper ends of the left rear foot pipe and the right rear foot pipe through connecting lugs, and handrails are further arranged at the upper ends of the left front foot pipe and the right front foot pipe; the pedals are vertically distributed between the left front foot pipe and the right front foot pipe and are hinged with the left front foot pipe and the right front foot pipe; the connecting rod assembly comprises a long connecting rod and a short connecting rod, the long connecting rod is hinged with each pedal, one end of the short connecting rod is hinged with the pedal at the top, and the other end of the short connecting rod is hinged with the rear foot tube; a cross rod is arranged between the left rear foot tube and the right rear foot tube and corresponds to the pedal at the top, and the rear end of the pedal at the top is connected to the cross rod in a bearing mode; the rear end of the pedal at the top is also provided with a safety hook which is buckled with the cross rod; the weighing integrated circuit and the warning device are arranged on the connecting lug or the armrest or the safety hook or the pedal (or other obvious positions).
The invention has the following beneficial effects:
(1) the weighing integrated circuit of the ladder with the bearing prompt function is triggered and started by the bearing sensor, the signal of the bearing sensor is calculated to obtain the bearing information of the ladder, and when a user exceeds the limited bearing capacity after climbing the ladder, the warning device gives a prompt to prevent the ladder from working in an overload state, and the user does not know the situation, so that the use safety of the ladder is improved;
(2) when the ladder with the bearing prompt function is normally used, the bearing sensor is stressed, and the bearing sensor does not bear the weight within a certain time, the weighing integrated circuit is in a dormant state, so that the loss of a power supply is reduced, and when the ladder is placed in a normal use mode, the weighing integrated circuit is awakened after the bearing sensor is pressed;
(3) the ladder warning device with the bearing prompt function comprises a display screen module, and the weight of the ladder on the ground can be displayed through the display screen module, so that the ladder can be used as a weighing device;
(4) the weighing integrated circuit of the ladder with the bearing prompt function is also provided with a bearing data zero clearing key, so that the weight of the ladder and the weight of other accessories can be removed in a zero clearing mode to better reflect the actual bearing of the ladder;
(5) the ladder warning device with the bearing prompt function comprises a sound playing module, and the weight of the ladder on the ground can be played through the sound playing module;
(6) compared with the existing ladder products in the market, the ladder with the bearing prompt function has the advantages that the combination of the electrons and the ladder is realized, so that the ladder has the functions of weighing and bearing prompt, the ladder has more intelligent safety setting, and a user has more humanized use experience; the user can be according to the actual data that the ladder reflected, and the security that the ladder used is increased to the actual in service behavior of better perception ladder.
Drawings
Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.
Fig. 2 is an enlarged schematic view of the safety hook in fig. 1.
Fig. 3 is another structural diagram of fig. 2.
FIG. 4 is an exploded view of the load bearing sensor of the present invention.
Fig. 5 is a schematic view of the assembled structure of fig. 4.
FIG. 6 is a schematic structural view of another installation mode of the load bearing sensor of the present invention.
Fig. 7 is an exploded view of fig. 6.
FIG. 8 is an exploded view of another embodiment of the load bearing sensor of the present invention.
Fig. 9 is a partial structural view of fig. 8 after assembly.
Detailed Description
The invention is further described with reference to the following figures and examples.
In a first embodiment, referring to fig. 1 to 5, a ladder with a load-bearing prompt function includes a ladder, wherein the ladder is further provided with a load-bearing sensor 20, a weighing integrated circuit 9 for calculating a signal of the load-bearing sensor 20, and a warning device for sending a status signal, the load-bearing sensor 20 is in signal connection with the weighing integrated circuit 9, and the warning device is electrically connected with the weighing integrated circuit 9; the load-bearing sensor 20 is arranged at the pressure-bearing stressed position of the ladder.
The load-bearing sensor 20 is arranged at the foot part of the ladder; the ladder comprises a ladder body 10 and anti-skidding foot sleeves 1, wherein the anti-skidding foot sleeves 1 are arranged at the bottoms of ladder feet 32 of the ladder body 10, and the anti-skidding foot sleeves 1 and the ladder feet 32 form the feet. The method comprises the following steps: the load-bearing sensor 20 is arranged between the ladder foot 32 and the anti-skid foot cover 1.
The top of the anti-skid foot sleeve 1 is provided with a sleeve hole 12, the bottom surface in the sleeve hole 12 is set to be a hard surface, the bearing sensor 20 is arranged at the bottom surface of the ladder foot 32, and the ladder foot 32 is inserted into the sleeve hole 12 and is in telescopic fit with the sleeve hole 12; the bearing sensor 20 is provided with a fixed frame, a stress sensing element and a contact arm, the stress sensing element is arranged on the fixed frame, the fixed frame is fixedly connected with the bottom surface of the ladder foot 32, one end of the contact arm is connected with the detection surface of the stress sensing element, and the other end of the contact arm extends out of the bottom surface of the fixed frame and abuts against the inner bottom surface of the trepanning 12. The inner bottom surface of the trepan boring 12 is provided with a metal gasket 30 to form the hard surface. The outer side of the anti-skidding foot sleeve 1 is provided with a long round hole 11 which points up and down, the long round hole 11 is communicated with the sleeve hole 12, the ladder foot 32 is internally provided with a connecting hole 33 corresponding to the sleeve hole 12, the rivet 40 penetrates through the long round hole 11 from the outside of the anti-skidding foot sleeve 1 and then is riveted with the connecting hole 33, and the ladder foot 32 and the rivet 40 slide up and down in the range of the long round hole 11.
The ladder comprises a left front foot pipe 3, a right front foot pipe 3, a left rear foot pipe 8, a plurality of pedals 2 and a connecting rod assembly, wherein the upper ends of the left front foot pipe 3 and the right front foot pipe 3 are respectively hinged with the upper ends of the left rear foot pipe 8 and the right rear foot pipe 8 through connecting lugs 6, and handrails 31 are further arranged at the upper ends of the left front foot pipe 3 and the right front foot pipe 3; the pedals 2 are vertically distributed between the left front foot pipe 3 and the right front foot pipe 3 and are hinged with the left front foot pipe 3 and the right front foot pipe 3; the connecting rod assembly comprises a long connecting rod 4 and a short connecting rod 7, the long connecting rod 4 is hinged with each pedal 2, one end of the short connecting rod 7 is hinged with the pedal 2 at the top, and the other end of the short connecting rod 7 is hinged with the rear foot tube 8; a cross rod 81 is arranged between the left rear foot tube 8 and the right rear foot tube 8 corresponding to the pedal 2 at the top, and the rear end of the pedal 2 at the top is connected to the cross rod 81 in a bearing mode; the back end of the pedal 2 at the top is also provided with a safety hook 51, and a safety hook 5 is buckled with the cross rod 81. The lower end of the one of the front leg tubes 3 forms the ladder leg 32.
The integrated weighing circuit 9 and the warning device are arranged on the connecting lug 6 (at a in fig. 1) or the handrail 31 (at B in fig. 1, where some ladders are located as tool boxes, and the integrated weighing circuit 9 and the warning device can also be arranged) or the safety hook 51 (at C in fig. 1) or the pedal 2 (at D in fig. 1). The weighing integrated circuit 9 and the warning device are preferably arranged on the safety hook 51 in this embodiment.
The warning device comprises a display screen module 91 and a sound playing module 92; the load-bearing sensor 20 and the weighing integrated circuit 9 are in signal connection through a lead, or the load-bearing sensor 20 and the weighing integrated circuit 9 are in wireless signal connection. Preferably, the display panel module 91 is provided with two types of backlights. Referring to fig. 2, the parameters displayed by the display screen module 91 indicate that the ladder bears 140KG of weight, which is within the Normal (Normal) bearing range. Referring to fig. 3, the parameters displayed by the screen module 91 indicate that the ladder is loaded with 151KG of weight and is overweight (Over weight).
The integrated weighing circuit 9 is also electrically connected with a load-bearing data zero clearing key 93.
Preferably, the weighing ic 9 is electrically connected to a solar charging board, and the solar charging board is disposed on the ladder, not shown in the figure.
The second embodiment is different from the first embodiment in that: referring to fig. 6 and 7, a groove 13 is formed in the bottom surface of the anti-slip foot cover 1, a fixing frame of the bearing sensor 20 is embedded in the bottom surface of the anti-slip foot cover 1, a contact arm of the bearing sensor 20 extends out of the bottom surface of the anti-slip foot cover 1, namely, a bearing measurement point is located on the bottom surface of the anti-slip foot cover 1, and the bearing sensor 20 is in contact pressure with the ground and the anti-slip foot cover 1.
The third embodiment is different from the first embodiment in that: as shown in reference to figures 8 and 9,
the load bearing sensor 20 is arranged at the pedal connection part of the ladder; specifically, the ladder comprises a ladder body 10, the ladder body 10 comprises foot tubes (here, a left front foot tube and a right front foot tube 3) and pedals 2, the pedals 2 are connected on the foot tubes (here, transverse tubes 34 connected to the lower ends of the left front foot tube and the right front foot tube 3), and the connection parts of the pedals and the foot tubes form the connection parts of the pedals. The weight sensor 20 is disposed between the pedals 2 (lowermost pedal 2) and the cross tube 34.
Claims (10)
1. The utility model provides a possess bearing prompt facility's ladder utensil, includes ladder utensil, its characterized in that: the ladder is also provided with a load-bearing sensor, a weighing integrated circuit for calculating a load-bearing sensor signal and a warning device for sending a state signal, the load-bearing sensor is in signal connection with the weighing integrated circuit, and the warning device is electrically connected with the weighing integrated circuit; the bearing sensor is arranged on the pressure bearing and bearing position of the ladder.
2. The ladder with the load-bearing prompt function as claimed in claim 1, wherein: the load-bearing sensor is arranged at the foot part of the ladder; the ladder comprises a ladder body and anti-skidding foot sleeves, wherein the anti-skidding foot sleeves are arranged at the bottoms of ladder feet of the ladder body, and the anti-skidding foot sleeves and the ladder feet form the feet.
3. The ladder with the load-bearing prompting function of claim 2, wherein: the bearing sensor is arranged between the ladder foot and the anti-skidding foot sleeve; or the bearing sensor is arranged on the bottom surface of the anti-skidding foot sleeve.
4. The ladder with the load-bearing prompt function as claimed in claim 3, wherein: the top of the anti-skid foot sleeve is provided with a sleeve hole, the bottom surface in the sleeve hole is a hard surface, the bearing sensor is arranged on the bottom surface of the ladder foot, and the ladder foot is inserted into the sleeve hole and is in telescopic fit with the sleeve hole; the bearing sensor is provided with a fixing frame, a stress sensing element and a contact arm, the stress sensing element is arranged on the fixing frame, the fixing frame is fixedly connected with the bottom surface of the ladder foot, one end of the contact arm is connected with the detection surface of the stress sensing element, and the other end of the contact arm extends out of the bottom surface of the fixing frame and is abutted against the inner bottom surface of the trepanning.
5. The ladder with the load-bearing prompt function as claimed in claim 1, wherein: the bearing sensor is arranged at the pedal connection part of the ladder; the ladder comprises a ladder body, the ladder body comprises a foot tube and a pedal, the pedal is connected to the foot tube, and the pedal and the connecting part of the pedal and the foot tube form the connecting part of the pedal.
6. The ladder with the load-bearing prompt function of claim 5, wherein: the load-bearing sensor is arranged between the pedal and the foot tube; alternatively, the load bearing sensor is disposed on the top surface of the step.
7. The ladder with the load-bearing prompt function as claimed in claim 1, wherein: the warning device comprises a display screen module and/or a sound playing module; the load-bearing sensor is in signal connection with the weighing integrated circuit through a wire, or the load-bearing sensor is in wireless signal connection with the weighing integrated circuit.
8. The ladder with the load-bearing prompt function as claimed in claim 1, wherein: and the weighing integrated circuit is also electrically connected with a load-bearing data zero clearing key.
9. The ladder with the load-bearing prompt function as claimed in claim 1, wherein: the integrated circuit electric connection that weighs has solar charging panel, and solar charging panel sets up on the ladder utensil.
10. The ladder with the load-bearing prompt function as claimed in claim 1, wherein: the ladder comprises a left front foot pipe, a right front foot pipe, a left rear foot pipe, a right rear foot pipe, a plurality of pedals and a connecting rod assembly, wherein the upper ends of the left front foot pipe and the right front foot pipe are respectively hinged with the upper ends of the left rear foot pipe and the right rear foot pipe through connecting lugs, and handrails are further arranged at the upper ends of the left front foot pipe and the right front foot pipe; the pedals are vertically distributed between the left front foot pipe and the right front foot pipe and are hinged with the left front foot pipe and the right front foot pipe; the connecting rod assembly comprises a long connecting rod and a short connecting rod, the long connecting rod is hinged with each pedal, one end of the short connecting rod is hinged with the pedal at the top, and the other end of the short connecting rod is hinged with the rear foot tube; a cross rod is arranged between the left rear foot tube and the right rear foot tube and corresponds to the pedal at the top, and the rear end of the pedal at the top is connected to the cross rod in a bearing mode; the rear end of the pedal at the top is also provided with a safety hook which is buckled with the cross rod;
the weighing integrated circuit and the warning device are arranged on the connecting lug or the handrail or the safety hook or the pedal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810915594.7A CN110821387A (en) | 2018-08-13 | 2018-08-13 | Ladder with bearing prompt function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810915594.7A CN110821387A (en) | 2018-08-13 | 2018-08-13 | Ladder with bearing prompt function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110821387A true CN110821387A (en) | 2020-02-21 |
Family
ID=69546847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810915594.7A Withdrawn CN110821387A (en) | 2018-08-13 | 2018-08-13 | Ladder with bearing prompt function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110821387A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2518094Y (en) * | 2001-08-16 | 2002-10-23 | 郭晶耀 | Ladder sensing device |
| US6966403B1 (en) * | 2003-02-10 | 2005-11-22 | Suresh Chandra | Smart ladder |
| CN201048735Y (en) * | 2007-06-12 | 2008-04-23 | 杨建辉 | Foldable height-ascending ladder stool |
| CN205063791U (en) * | 2015-10-16 | 2016-03-02 | 金岳（天津）金属制品有限公司 | Multi -functional three -section ladder |
| CN106050122A (en) * | 2016-06-01 | 2016-10-26 | 国家电网公司 | Intelligent power maintenance ladder assembly |
| CN209195242U (en) * | 2018-08-13 | 2019-08-02 | 佛山市顺德区万怡家居用品有限公司 | The ladder for having load-bearing prompt facility |
-
2018
- 2018-08-13 CN CN201810915594.7A patent/CN110821387A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2518094Y (en) * | 2001-08-16 | 2002-10-23 | 郭晶耀 | Ladder sensing device |
| US6966403B1 (en) * | 2003-02-10 | 2005-11-22 | Suresh Chandra | Smart ladder |
| CN201048735Y (en) * | 2007-06-12 | 2008-04-23 | 杨建辉 | Foldable height-ascending ladder stool |
| CN205063791U (en) * | 2015-10-16 | 2016-03-02 | 金岳（天津）金属制品有限公司 | Multi -functional three -section ladder |
| CN106050122A (en) * | 2016-06-01 | 2016-10-26 | 国家电网公司 | Intelligent power maintenance ladder assembly |
| CN209195242U (en) * | 2018-08-13 | 2019-08-02 | 佛山市顺德区万怡家居用品有限公司 | The ladder for having load-bearing prompt facility |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200221 |