CN102003136B - Locking structure for telescopic ladder - Google Patents
Locking structure for telescopic ladder Download PDFInfo
- Publication number
- CN102003136B CN102003136B CN 201010524708 CN201010524708A CN102003136B CN 102003136 B CN102003136 B CN 102003136B CN 201010524708 CN201010524708 CN 201010524708 CN 201010524708 A CN201010524708 A CN 201010524708A CN 102003136 B CN102003136 B CN 102003136B
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- CN
- China
- Prior art keywords
- latch
- adapter sleeve
- unlocking switch
- automatic unlocking
- extension ladder
- 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.)
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- 238000003780 insertion Methods 0.000 claims description 17
- 230000037431 insertion Effects 0.000 claims description 17
- 230000000694 effects Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 210000003813 thumb Anatomy 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06C—LADDERS
- E06C7/00—Component parts, supporting parts, or accessories
- E06C7/06—Securing devices or hooks for parts of extensible ladders
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- 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
- E06C1/04—Ladders for resting against objects, e.g. walls poles, trees
- E06C1/08—Ladders for resting against objects, e.g. walls poles, trees multi-part
- E06C1/12—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic
- E06C1/125—Ladders for resting against objects, e.g. walls poles, trees multi-part extensible, e.g. telescopic with tubular longitudinal members nested within each other
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Ladders (AREA)
Abstract
The invention relates to a locking structure for a telescopic ladder, comprising a connecting sleeve. The connecting sleeve is used for connecting a section rod and a corresponding rail, a bolt is arranged in the connecting sleeve and can horizontally and transversely move corresponding to the connecting sleeve, and the interior of the connecting sleeve is provided with a push knob for driving the bolt to transversely move, which is characterized in that the interior of the connecting sleeve is further provided with an automatically unlocking switch connected with the bolt. The automatically unlocking switch is rotationally arranged in the connecting sleeve, the rotation of the automatically unlocking switch can drive the bolt to transversely move, a jack is arranged on the lower end surface of the connecting sleeve, the upper end surface of the connecting sleeve is provided with a pushing part protruded upwards, and the pushing part can be inserted into a jack of the connecting sleeve in an adjacent higher locking structure so as to push the automatically unlocking switch to rotate. The locking structure for the telescopic ladder can be unlocked in single section step by step and also automatically unlock the adjacent higher locking structure after a lower locking structure is unlocked.
Description
Technical field
The present invention relates to a kind of have somely can slide and mutually nested together the extension ladder of terraced bar particularly a kind of latch-up structure that is used for extension ladder relatively.
Background technology
When maintenance or maintenance task take place for dwelling house, apartment, farm, factory and other places, often need the use ladder.Ladder must be covered up obsolete the time somewhere.Long ladder can let people arrive higher height, but but is not easy to carry and in collection, can takies more space.And telescopic ladder just can extend ladder in use, and when collection, ladder is folded up.
Patent documentation about extension ladder has much at present; Have and disclose a kind of safe extension ladder easy to use like this for the United States Patent (USP) of US7048094 No. one; This ladder comprises: the first terraced bar, the second terraced bar and extend in the first terraced bar and the second terraced bar between some crosspieces; The first terraced bar includes first pole and second pole, and this first pole includes an inner surface, and second pole connects into the stretching structure of a relative motion along its length through the nested mode and first pole; One locking mechanism is selectively tight with the relative first segment lever lock of second pole; One button is operatively coupled on the locking mechanism, is used to control this locking mechanism; This patent is characterised in that; Described button is arranged on the position near first pole; And have one can with the suitable recess of thumb finger tip size, the thumb finger tip is placed in this recess and can promotes button and cancel the locking of locking mechanism to second pole along the direction from first pole toward second pole; One sleeve pipe is set on the external surface of second pole; This sleeve pipe has and the contacted outer spigot surface of the inner surface of first pole.Aforementioned extension ladder has the locking mechanism of a band push button.
Like a patent No. is a kind of extension ladder latch-up structure with push button the Chinese utility model patent " extension ladder " of ZL200620141000.4 (notification number is CN200985735Y) has disclosed.
The shortcoming of aforementioned various extension ladders be must one next the button pressed on each crosspiece could ladder be folded up, it is time-consuming that this just makes this ladder fold up.
Summary of the invention
Technical problem to be solved by this invention be to above-mentioned prior art present situation and but the release step by step of a kind of both single-units is provided, can realize can be with the latch-up structure that is used for extension ladder of adjacent higher level's latch-up structure automatic unlocking after subordinate's latch-up structure release.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of latch-up structure that is used for extension ladder; Comprise the adapter sleeve that is used to connect pole and corresponding crosspiece; Be provided with latch in the adapter sleeve, this latch relatively the adapter sleeve horizontal cross move and can expose and will be adjacent two save rod lock together up and down, be provided with the spring that makes latch remain the trend of exposing in the said adapter sleeve; And laterally mobile the pushing away of driving latch turned round; It is characterized in that: also be provided with the automatic unlocking switch that links to each other with latch in the said adapter sleeve, collapse and touch when arriving to subordinate's adapter sleeve at extension ladder, said automatic unlocking switch is touched and is driven latch and laterally moves and release.
Above-mentioned automatic unlocking switch rotates and is arranged in the adapter sleeve; The rotation of automatic unlocking switch can drive latch and laterally move; The lower surface of said adapter sleeve has jack; The upper surface of adapter sleeve has the pushing part that raises up, and this pushing part can be inserted in the jack of adapter sleeve in adjacent higher level's latch-up structure and promoted the automatic unlocking switch and rotate.The mode of rotating release is more steady; Certainly the automatic unlocking switch also can adopt the mode that can move horizontally to be arranged in the adapter sleeve; Pushing part automatic unlocking switch adopts the inclined-plane fit structure; Collapse and touch when arriving to subordinate's adapter sleeve and make at extension ladder, the pushing part can promote the traversing and release of automatic unlocking switch.
Above-mentioned automatic unlocking switch is L-shaped; The automatic unlocking switch is made up of shaft, vertical portion and horizontal part three parts; Said shaft constrains in the adapter sleeve and can rotate around self axis, and vertically the inner of the lower end of portion and horizontal part all fixed with shaft, and vertically the upper end of portion links to each other with said latch; The outer end of horizontal part extends to said jack position place, and said pushing part is inserted and promoted the outer end of horizontal part behind the jack of adapter sleeve in adjacent higher level's latch-up structure and the automatic unlocking switch is rotated.The automatic unlocking switch is arranged to L shapedly can the portion of being pushed drive and rotate final the drive under the prerequisite that latch moves satisfying the automatic unlocking switch, and its structure is the simplest.Certainly the automatic unlocking switch also can be designed to other profile, can drive latch and laterally moves as long as can satisfy the rotation of automatic unlocking switch.
There are two and parallel interval setting in the vertical portion of above-mentioned automatic unlocking switch; Vertically the lower end of portion is connected with the middle part of shaft; Said latch middle part has first cannelure, and the upper end of the vertical portion of said automatic unlocking switch is stuck in first cannelure and with the end face of first cannelure and touches; The horizontal part of said automatic unlocking switch has two and parallel interval setting, and the inner of horizontal part is connected with the two ends of shaft respectively, and the jack of adapter sleeve also has two.And the automatic unlocking switch is stuck in through the vertical portion on it and realizes in first cannelure being connected of automatic unlocking switch and latch, so assembling is also very convenient, two horizontal parts is set can guarantees that the pushing part can more steadily promote the automatic unlocking switch and rotate.Certainly vertically portion and horizontal part also can have only one; Only need on latch, to open an axial strip through-hole that is provided with, vertical portion is inserted in the strip through-hole, it is higher to the matching requirements between each parts; And this automatic unlocking construction of switch is too thin, can not smooth rotation.
The upper end of the vertical portion of above-mentioned automatic unlocking switch is circular-arc.Vertically the end face of the portion and first cannelure is that cambered surface contacts, and when the automatic unlocking switch rotates, can easily promote the horizontal slippage of latch like this.
The horizontal part outer end of above-mentioned automatic unlocking switch has two to the salient point that extends below and insert corresponding jack.So better the pushing part on the adapter sleeve contacts with the automatic unlocking switch temperature, and in identical moving range, makes automatic unlocking switch rotational angle bigger.
The inboard of above-mentioned adapter sleeve has the insertion section of pegging graft with crosspiece, has cavity in the insertion section, and said latch, automatic unlocking switch and spring are positioned at this cavity; The adapter sleeve outside has annular surface, and this annular surface forms the socket with the pole socket, has the through hole that connects and pass for latch with cavity on the socket wall.It is the conventional structure of adapter sleeve, can conveniently crosspiece and pole be connected on this adapter sleeve.
For ease of settling spring; Be fixed with a spring base in the cavity of above-mentioned insertion section; Have containing hole on the spring base, the rear portion of said latch then is positioned at the front portion of containing hole, and said spring is positioned at the rear portion of containing hole; One end of spring is resisted against the rear portion of latch, and the other end of spring is resisted against on the back inwall of containing hole.
Above-mentioned spring base both sides have insert edge, correspondence, and both sides are provided with the slot that supplies insert edge to plug in the cavity.Through the effect of insert edge and slot, can be conveniently that spring base is spacing in cavity.
The bar hole that has horizontally set on the front end face of the insertion section of above-mentioned adapter sleeve and communicate with said cavity; The latch middle part has second cannelure; Said pushing away turned round outside the front end face that is positioned at the insertion section; Push away and have the connecting portion that extends back on the rear end face of turning round, this connecting portion pass be buckled in behind the bar hole in said second cannelure and with the end face touching of second cannelure.This pushes away the connected mode of turning round through buckle and is connected with latch, has convenient installation.
Compared with prior art; The invention has the advantages that: when the release step by step of needs single-unit; Then need higher level's latch-up structure from extension ladder step by step toward subordinate's release, only need promote during release to turn round, push away the moving latch lateral inward of twisted strip and move and just can remove the adjacent locking of two joint joint bars up and down of extension ladder; In the ban with after subordinate's latch-up structure release; Its adjacent higher level's latch-up structure is together with crosspiece past moving down under the effect of deadweight; The pushing part of the adapter sleeve in subordinate's latch-up structure is inserted in the jack of adapter sleeve in adjacent higher level's latch-up structure and is promoted the automatic unlocking switch and rotate; The final latch lateral inward that drives moves this grade of releasing latch-up structure, and by that analogy, it can automatically terminate higher level's latch-up structure step by step; Therefore this latch-up structure has the multifarious characteristics of release mode, and is therefore more convenient to operate.
Description of drawings
Fig. 1 is the perspective view (lock-out state) of the embodiment of the invention;
Fig. 2 is for pushing away the solid assembling sketch map of turning round with automatic unlocking switch and latch (lock-out state) in the embodiment of the invention;
Fig. 3 is the three-dimensional exploded view of the embodiment of the invention;
Fig. 4 is the sectional view (lock-out state) of the use of the embodiment of the invention on extension ladder;
Fig. 5 is the perspective view one (released state) of the embodiment of the invention;
Fig. 6 is the perspective view two (released state) of the embodiment of the invention;
Fig. 7 is for pushing away the solid assembling sketch map of turning round with automatic unlocking switch and latch (released state) in the embodiment of the invention;
The sectional view that Fig. 8 uses on extension ladder for the embodiment of the invention (released state);
The schematic perspective view that Fig. 9 uses on extension ladder for the embodiment of the invention (released state).
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
Shown in Fig. 1～9, be a preferred embodiment of the present invention.
A kind of latch-up structure that is used for extension ladder comprises the adapter sleeve 3 that is used to connect pole 1 and corresponding crosspiece 2,
The inboard of adapter sleeve 3 has the insertion section 33 of pegging graft with crosspiece 2; Has cavity 331 in the insertion section 33; The lower ending opening of this cavity 331; Be convenient to each parts is installed in the cavity 331, crosspiece 2 and fixing with crosspiece 2 is inserted in insertion section 33, the lower ending opening of cavity 331 is covered in the lower surface of crosspiece 2; Adapter sleeve 3 outsides have annular surface, and this annular surface forms the socket 34 with pole 1 socket, this socket 34 and pole 1 upper periphery close-fitting, and can be through screw that socket 34 is fixing with pole 1.
The inner cavity 331 of adapter sleeve 3 is provided with latch 4; Latch 4 middle parts have first cannelure 41; This latch 4 adapter sleeve 3 horizontal cross relatively moves and can expose and will be adjacent two save bars 1 and lock together up and down, is provided with the spring 5 that makes latch 4 remain the trend of exposing in the adapter sleeve 3, has the through hole 341 that connects and pass for latch 4 with cavity 331 on socket 34 walls; Have lockhole 11 on pole 1 wall that fixes with adapter sleeve 3; A last joint joint bar 1 middle part that is plugged in aforementioned pole 1 also is provided with a lockhole 12, after latch 4 passes adapter sleeve 3, gets into successively in the lockhole 11,12 of two poles 1, with this two joints joint bar, 1 locking.It is the conventional design of the latch-up structure of existing extension ladder.
One drives laterally mobile the pushing away of latch 4 turns round 6; Push away and turn round 6 and be positioned at outside the front end face of insertion section 33; Push away to turn round on 6 the rear end face and have the connecting portion 61 that extends back, the bar hole 333 that has horizontally set on the front end face of the insertion section 33 of adapter sleeve and communicate with cavity 3, certainly; Because insertion section 33 is plugged in the crosspiece 2; Therefore also have and aforementioned bar hole 333 corresponding bar holes on the sidewall of crosspiece 2, have second cannelure 42, push away and turn round 6 connecting portion 61 and pass successively to be buckled in second cannelure 42 and behind bar hole and the bar hole on the insertion section 333 on the crosspiece 2 and touch with the end face of second cannelure 42 at latch 4 middle parts.
Also be provided with the automatic unlocking switch 7 that links to each other with latch 4 in the cavity 331 of adapter sleeve 3; Automatic unlocking switch 7 is L-shaped; Automatic unlocking switch 7 is by shaft 71, vertically portion 72 and horizontal part 73 3 parts are formed, the part that is formed in one of the automatic unlocking switch 7 in the present embodiment.Automatic unlocking switch 7 rotates through shaft 71 and is arranged in the adapter sleeve 3, and shaft 71 constrains in the adapter sleeve 3 and can rotate around self axis, and the rotation of automatic unlocking switch 7 can drive latch 4 and laterally move; There are two and parallel interval setting in the vertical portion 72 of automatic unlocking switch; Vertically the lower end of portion 72 is connected with the middle part of shaft 71; The upper end of the vertical portion 72 of automatic unlocking switch is stuck in first cannelure 41 and with the end face of first cannelure 41 and touches, and vertically the upper end of portion 72 is circular-arc; The horizontal part 73 of automatic unlocking switch has two and parallel interval setting; The inner of horizontal part 72 is connected with the two ends of shaft 71 respectively; The lower surface of adapter sleeve 3 has two jacks 31; The outer end of horizontal part 73 extends to jack 31 positions, and horizontal part 73 outer ends have two to the salient point that extends below and insert corresponding jack 31 731.
The upper surface of adapter sleeve 3 has two pushing parts that raise up 32, after the jack 31 of adapter sleeve in adjacent higher level's latch-up structure is inserted in pushing part 32, promotes the outer end of horizontal parts 73 and automatic unlocking switch 7 is rotated.
The operating principle and the process of this latch-up structure are following.
Shown in Fig. 1～4; During locking, move on the last joint joint bar 1, when moving to correct position; Be that lock hole 11,12 is positioned on the same axis on the adjacent two joint joint bars 1; Latch 4 ejects under the effect of spring 5, inserts simultaneously in the lockhole 11,12 of this two joints joint bar 1, and this two joints joint bar 1 is locked together.
Shown in Fig. 5～9; When the release step by step of needs single-unit, then need higher level's latch-up structure past subordinate release step by step from extension ladder, only need promote to turn round 6 during release; Push away and turn round 6 and drive the elastic force lateral inward that latches 4 overcome spring 5 and move; Latch 4 withdraws from the lockhole 11,12 of two joint joint bars 1, removes the adjacent locking of two joint joint bars 1 up and down of extension ladder, and a last joint joint bar 1 moves down under the effect of gravity.
Shown in Fig. 5～9; Automatically terminate higher level's latch-up structure step by step; Promote earlier to ox with subordinate's latch-up structure release after, its adjacent higher level's latch-up structure together with crosspiece 2 in the effect of deadweight down toward moving down, insert in the jack 31 of adapter sleeve in adjacent higher level's latch-up structure and the salient point 731 of promotion horizontal part 73 pushing part 32 of the adapter sleeve in subordinate's latch-up structure; Automatic unlocking switch 7 rotates; Final latch 4 lateral inward that drive move this grade of releasing latch-up structure, and by that analogy, it can remove higher level's latch-up structure step by step.
Claims (9)
1. latch-up structure that is used for extension ladder; Comprise the adapter sleeve (3) that is used to connect pole (1) and corresponding crosspiece (2); Be provided with latch (4) in the adapter sleeve (3); This latch (4) relatively adapter sleeve (3) horizontal cross move and can expose and will be adjacent two save bars (1) and lock together up and down; Be provided with the spring (5) that makes latch (4) remain the trend of exposing in the said adapter sleeve (3), reach laterally mobile the pushing away of driving latch (4) and turn round (6), it is characterized in that: also be provided with the automatic unlocking switch (7) that links to each other with latch (4) in the said adapter sleeve (3); Collapse and touch when arriving to subordinate's adapter sleeve (3) at extension ladder, said automatic unlocking switch (7) is touched and is driven latch (4) and laterally moves and release; Said automatic unlocking switch (7) rotates and is arranged in the adapter sleeve (3); The rotation of automatic unlocking switch (7) can drive latch (4) and laterally move; The lower surface of said adapter sleeve (3) has jack (31); The upper surface of adapter sleeve (3) has the pushing part (32) that raises up, and this pushing part (32) can insert in the jack (31) of adapter sleeve in adjacent higher level's latch-up structure and promote automatic unlocking switch (7) and rotate.
2. the latch-up structure that is used for extension ladder according to claim 1; It is characterized in that: said automatic unlocking switch (7) is L-shaped; Automatic unlocking switch (7) is made up of shaft (71), vertical portion (72) and horizontal part (73) three parts; Said shaft (71) constrains in the adapter sleeve (3) and can rotate around self axis; Vertically the lower end of portion (72) and horizontal part (73) is inner all fixing with shaft (71); Vertically the upper end of portion (72) links to each other with said latch (4), and the outer end of horizontal part (73) extends to said jack (31) position, and jack (31) back that adapter sleeve in adjacent higher level's latch-up structure is inserted in said pushing part (32) promotes the outer end of horizontal part (73) and automatic unlocking switch (7) is rotated.
3. the latch-up structure that is used for extension ladder according to claim 2; It is characterized in that: there are two and parallel interval setting in the vertical portion (72) of said automatic unlocking switch; Vertically the lower end of portion (72) is connected with the middle part of shaft (71); Said latch (4) middle part has first cannelure (41), and the upper end of the vertical portion (72) of said automatic unlocking switch is stuck in first cannelure (41) and with the end face of first cannelure (41) and touches; The horizontal part of said automatic unlocking switch (73) has two and parallel interval setting, and the inner of horizontal part (72) is connected with the two ends of shaft (71) respectively, and the jack of said adapter sleeve (31) has two.
4. the latch-up structure that is used for extension ladder according to claim 3 is characterized in that: the upper end of the vertical portion (72) of said automatic unlocking switch is circular-arc.
5. the latch-up structure that is used for extension ladder according to claim 3 is characterized in that: the horizontal part of said automatic unlocking switch (73) outer end has two to the salient point that extends below and insert corresponding jack (31) (731).
6. according to the described latch-up structure that is used for extension ladder of arbitrary claim in the claim 1～5; It is characterized in that: the inboard of said adapter sleeve (3) has the insertion section (33) of pegging graft with crosspiece (2); Have cavity (331) in the insertion section (33), said latch (4), automatic unlocking switch (7) and spring (5) are positioned at this cavity (331); Adapter sleeve (3) outside has annular surface, and this annular surface forms the socket (34) with pole (1) socket, has the through hole (341) that connects and pass for latch (4) with cavity (331) on socket (34) wall.
7. the latch-up structure that is used for extension ladder according to claim 6; It is characterized in that: also be fixed with a spring base (8) in the cavity of said insertion section (331); Have containing hole (81) on the spring base (8), the rear portion of said latch (4) then is positioned at the front portion of containing hole (81), and said spring (5) is positioned at the rear portion of containing hole (81); One end of spring (5) is resisted against the rear portion of latch (4), and the other end of spring (5) is resisted against on the back inwall of containing hole (81).
8. the latch-up structure that is used for extension ladder according to claim 7 is characterized in that: said spring base (8) both sides have insert edge (82), correspondence, and the interior both sides of cavity (331) are provided with the slot (332) that supplies insert edge to plug.
9. the latch-up structure that is used for extension ladder according to claim 6; It is characterized in that: the bar hole (333) that has horizontally set on the front end face of the insertion section of said adapter sleeve (33) and communicate with said cavity (3); Latch (4) middle part has second cannelure (42); Said pushing away turned round outside the front end face that (6) be positioned at insertion section (33); Push away and have the connecting portion (61) that extends back on the rear end face of turning round (6), this connecting portion (61) pass be buckled in behind the bar hole (333) in said second cannelure (42) and with the end face touching of second cannelure (42).
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010524708 CN102003136B (en) | 2010-10-28 | 2010-10-28 | Locking structure for telescopic ladder |
| PCT/CN2011/001700 WO2012055159A1 (en) | 2010-10-28 | 2011-10-11 | Locking structure for extensionableladder |
| EP11835433.1A EP2634360A4 (en) | 2010-10-28 | 2011-10-11 | Locking structure for extensionableladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010524708 CN102003136B (en) | 2010-10-28 | 2010-10-28 | Locking structure for telescopic ladder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102003136A CN102003136A (en) | 2011-04-06 |
| CN102003136B true CN102003136B (en) | 2012-09-12 |
Family
ID=43810807
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010524708 Active CN102003136B (en) | 2010-10-28 | 2010-10-28 | Locking structure for telescopic ladder |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2634360A4 (en) |
| CN (1) | CN102003136B (en) |
| WO (1) | WO2012055159A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102003136B (en) * | 2010-10-28 | 2012-09-12 | 王万兴 | Locking structure for telescopic ladder |
| CN102278059B (en) * | 2011-07-08 | 2013-06-05 | 王万兴 | Extension ladder with finger-protected device |
| DE202011052241U1 (en) | 2011-12-08 | 2012-01-16 | Xiaoling Chen | A retractable or retractable ladder |
| DE202012100555U1 (en) | 2012-02-20 | 2012-03-28 | Xiaoping Ying | Locking device for a retractable or extendable ladder |
| CN110344747B (en) | 2014-08-18 | 2020-11-24 | 兰普控股私人有限公司 | Telescopic ladder assembly |
| WO2017151558A1 (en) * | 2016-02-29 | 2017-09-08 | Core Distribution, Inc. | Telescoping ladder with a cascading collapse mechanism |
| DE202018102581U1 (en) | 2018-05-08 | 2018-05-29 | Zhejiang Kollmax Industry & Trade Co.,Ltd | Locking structure for telescopic ladders and telescopic ladder with self |
| CN108394651A (en) * | 2018-05-29 | 2018-08-14 | 上海乐臣自动化设备有限公司 | A kind of attaching/detaching apparatus of container medium lock |
| CN108811734B (en) * | 2018-07-10 | 2020-06-02 | 长江师范学院 | Ladder stand structure |
| CN108811735B (en) * | 2018-07-10 | 2020-06-02 | 长江师范学院 | Ladder is picked to fruit |
| CN109197137B (en) * | 2018-10-31 | 2020-10-30 | 长江师范学院 | Fruit tree fruit picking device |
| CN110054047A (en) * | 2019-04-16 | 2019-07-26 | 快意电梯股份有限公司 | Elevator only stop device |
| CN113047766B (en) * | 2021-04-02 | 2024-07-02 | 苏州莱恩精工合金股份有限公司 | Inner and outer ladder locking device and multifunctional ladder comprising same |
| CN114991718B (en) * | 2022-06-17 | 2023-02-07 | 中海石油(中国)有限公司 | Routing module operating system for seabed oil and gas operation |
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| CN102003136B (en) * | 2010-10-28 | 2012-09-12 | 王万兴 | Locking structure for telescopic ladder |
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2010
- 2010-10-28 CN CN 201010524708 patent/CN102003136B/en active Active
-
2011
- 2011-10-11 WO PCT/CN2011/001700 patent/WO2012055159A1/en active Application Filing
- 2011-10-11 EP EP11835433.1A patent/EP2634360A4/en not_active Withdrawn
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| CN200971751Y (en) * | 2006-10-30 | 2007-11-07 | 范刚 | Locking device for telescopic lalder |
| CN201507233U (en) * | 2009-08-28 | 2010-06-16 | 梁尧广 | Telescopic ladder |
| CN201883928U (en) * | 2010-10-28 | 2011-06-29 | 王万兴 | Locking structure for extension ladder |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2012055159A1 (en) | 2012-05-03 |
| EP2634360A4 (en) | 2014-11-19 |
| EP2634360A1 (en) | 2013-09-04 |
| CN102003136A (en) | 2011-04-06 |
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Owner name: NINGBO XINGFU TOOLS CO., LTD. Free format text: FORMER OWNER: WANG WANXING Effective date: 20140819 |
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