CN2677574Y - Positioning hinge structure for folding ladder - Google Patents
Positioning hinge structure for folding ladder Download PDFInfo
- Publication number
- CN2677574Y CN2677574Y CN 200420038624 CN200420038624U CN2677574Y CN 2677574 Y CN2677574 Y CN 2677574Y CN 200420038624 CN200420038624 CN 200420038624 CN 200420038624 U CN200420038624 U CN 200420038624U CN 2677574 Y CN2677574 Y CN 2677574Y
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- linking arm
- handwheel
- locating
- disc
- cover
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- Expired - Lifetime
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Abstract
The utility model discloses a positioning hinge structure for folding ladders, comprising a hollow right connecting arm and a left connecting arm. The end of the right connecting arm is provided with a circular housing, and the end of the left connecting arm is provided with a circular disk body which is fitted in the circular housing and is rotatable connected with the circular housing via a main rotating shaft. The circumferential edge of the circular disk body is provided with a plurality of position openings, a positioning block which can be fitted with the position opening, and a crank. The first end of the crank is rotatable connected to the end of the positioning block. The middle part of the crank is rotatable connected into the right connecting arm by a pin roll. The utility model is also provided with another connecting arm, and the first end of the connecting arm is movable connected with the second end of the crank. The middle part of the connecting arm is sheathed on the main rotating shaft, and the second end of the connecting arm is provided with a convex extending portion which extends outward. The utility model is also provided with a hand wheel which can rotate with the main rotating shaft as a center. A grooving which is sheathed with the convex extending portion on the connecting arm is provided in the hand wheel. The folding ladder which adopts the structure of the utility model has the advantages of more convenient and safe use.
Description
Technical field
The utility model relates to the structure member of folding ladder, specifically is meant the locating hinge structure that is used for folding ladder.
Background technology
Folding ladder is widely used in multiple occasions such as family, office, building site, and its main feature is need not be fixed against other object and can independently stand, and ascends a height for people.Existing folding ladder carries out the hinge connection by two ladders by its top usually and constitutes, this hinge is adopted specific structure, can realize turning to required angle between two ladders and being fixed in this position, thereby can make people to the regulating of the height of folding ladder, gradient, to satisfy the needs of different use occasions.As seen, this hinge arrangement has played conclusive effect to this function of folding ladder.At present, the diversified hinge arrangement that is used for folding ladder has been arranged, its basic structure roughly has two kinds:
The principle of first kind of structure is roughly as follows: be made of by bearing pin outer turning joint and interior turning joint and be rotatably connected, some locating notches are set on the periphery of interior turning joint, outer turning joint relative set a positioning block, be sticked in the locating notch, and be provided with the trigger that to stir this locating piece, pull this trigger, can make the locating piece locating notch that slips away, and make it turn to another locating notch to be in the effect of back-moving spring and to be sticked in wherein, thereby realize the regulating of height, gradient to folding ladder.The shortcoming of this hinge arrangement is: at first, trigger convexedly stretches in the hinge outside, colludes the clothes that is suspended to people easily; The second, in the operating process, trigger is stressed bigger, and is fragile; The 3rd, when the operator pulls trigger, must be earlier with the hinge through certain angle, so that locating piece breaks away from the locating notch position overlapped, could decontrol spanner then, otherwise locating piece will slip into locating notch again, hinder the rotation of hinge, it is just very inconvenient to operate like this.
Its present principles of second kind of structure is: comprise the hinge outside plate and the hinge inner panel that are rotatably connected by bearing pin, the end that this bearing pin convexedly stretches in the hinge outside plate outside is threaded with a handwheel, the end that bearing pin convexedly stretches in hinge inner panel inboard is fixedly connected with the bearing pin gland of a circle, on the bearing pin between bearing pin gland and the hinge inner panel, be arranged with spring, the side that the bearing pin gland is relative with the hinge inner panel is provided with some circumferential positioning convex column, hinge inner panel and hinge outside plate corresponding site are provided with some locating holes that match with this positioning convex column, by positioning convex column and cooperating of locating hole making hinges fixing schedule certain angle, the turn handwheel, under the effect that between handwheel and bearing pin, is threaded, bearing pin is moved to bearing pin gland direction, thereby promote positioning convex column and break away from locating hole, this moment, hinge was in rotatable state, when hinge through arrives the locating hole overlaid of desired position and hinge outside plate and hinge inner panel, again toward other direction turn handwheel, make bearing pin drive positioning convex column and insert locating hole, hinge is maintained static.Above-mentioned hinge arrangement has been owing to adopted handwheel, thereby overcome the shortcoming that adopts spanner to produce, but in use, positioning convex column be not easy very much with hinge inner panel and hinge outside plate on the locating hole aligned fit; Its inboard also can run into strong sliding friction when in addition, handwheel rotated.
In sum, the hinge arrangement of existing folding ladder remains in the improved shortcoming of needs.
The utility model content
The utility model provides a kind of locating hinge structure that is used for folding ladder, and its main purpose is to overcome the shortcoming that the hinge arrangement of above-mentioned existing folding ladder exists.
The utility model adopts following technical scheme: this locating hinge structure comprises the right linking arm and the left linking arm of hollow, right linking arm end is provided with round casing, linking arm end, a left side is provided with disc, disc is matched with in the round casing, and be rotatably connected by main shaft and round casing, the circumferential edges of disc is provided with some positioning ports, other is provided with a locating piece that can be matched with in the positioning port, this locating piece is positioned at right linking arm cavity, right linking arm two side corresponding site is provided with chute, and the locating piece dual-side is slidedly arranged in the chute; Also comprise a crank, first end of this crank is rotationally connected with the end of locating piece, and the middle part of crank is rotationally connected with in the right linking arm by a bearing pin, is arranged with the torsion spring that crank first end can be compressed to the disc direction on this bearing pin; Other has a linking arm, and first end of this linking arm and second end of crank flexibly connect, and the middle part of linking arm is sheathed on the main shaft rotationally, and second end of linking arm is provided with outward extending convex extension part, and corresponding site is provided with the circular arc storage tank on the round casing; Also being provided with one can main shaft be the handwheel that rotate at the center, be provided with in this handwheel can with the grooving of the mutual fit in convex extension part on the linking arm.
The positioning port of this locating hinge structure has three, and left linking arm and right linking arm in line, become a right angle when locating piece is matched with second locating notch when locating piece is matched with first positioning port, in an acute angle when locating piece is matched with the 3rd locating notch.
It can main shaft be the cover dish that rotate at the center that this locating hinge structure also is provided with two, the circumference of the first cover dish and the second cover dish is provided with the arc chute of working in coordination, be equipped with a positioning rod in this arc chute, backstay is fixed in the two side of round casing, the first cover dish is provided with corresponding to the first cover bar of first positioning port and second positioning port and the second cover bar, the first cover bar convexedly stretches in outside the disc circumferential edges, the second cover boom end is an oblique cambered surface, this oblique cambered surface concordant with the disklike body circumferential edges or be positioned at the disc circumferential edges by a side of first positioning port, opposite side convexedly stretches in outside the disc circumferential edges, the second cover dish is provided with the 3rd cover bar and connecting rod corresponding to the 3rd positioning port, connecting rod is between the first cover bar and the second cover bar, the 3rd cover boom end convexedly stretches in outside the disc circumferential edges, is provided with an extension spring between the first cover bar and the connecting rod.
The disc of the left linking arm end of this locating hinge structure is a double-decker, folder is established a torus between its double-decker, this toric radius is greater than the radius of disc, described locating piece should be ∩ shape structure mutually, its A/F equals toric thickness, its two foot can insert in the positioning port in the torus both sides, the upper left side of torus outer circumference surface has the circular arc mouth, the right linking arm top edge limited block that is pivoted, this limited block is provided with a crozier, and crozier can be fastened in the circular arc mouth.
Be provided with clutch discs in the handwheel of this locating hinge structure, it is bowl-shape that handwheel and clutch discs all are, its openend is fit in opposite directions, the round casing lateral surface is fixed in the bottom surface of clutch discs, and be provided with round casing on the overlapping deep-slotted chip breaker of circular arc storage tank, the sidewall edge of clutch discs is provided with the annular edge that outwards protrudes out, the external diameter of this annular edge is slightly less than the internal diameter of handwheel, this annular edge is provided with some clutch slot to handwheel one side depression, the inside wall edge of handwheel is provided with the button portion of some relied on clutch discs lateral walls that inwardly protrude out, this button portion corresponding matching one by one is provided with stage clip between clutch discs and the handwheel in clutch slot.
Also be provided with the button portion installation opening one to one in some and the handwheel on the annular edge of the clutch discs of this locating hinge structure.
By above-mentioned description to the utility model structure as can be known, compare with prior art, the utlity model has following advantage: at first, the utility model adopts handwheel, does not convexedly stretch in outside trip gear, can not collude the clothing that is suspended to people; Secondly, owing to adopted the cover dish, when the rotation handwheel makes locating piece break away from locating notch, the cover dish can cover in the positioning port position overlapped, even relieving handwheel, cover bar on the cover dish can prevent that also locating piece from slipping into locating notch at once, and this moment, people can adjust the angle between left linking arm and the right linking arm at leisure; The 3rd, compare with existing folding ladder hinge with handwheel structure, the utility model only need rotate handwheel when adjusting, make locating piece break away from locating notch, because the design feature of cover dish, turning joint is to certain position, and locating piece promptly is sticked in the locating notch automatically, does not have positioning convex column and the difficult problem of aiming at of locating hole in the past; The 4th, handwheel of the present utility model for rotatable, have only handwheel inwardly is pressed into just to turn, thereby makes operation safe when off working state.
Description of drawings
Fig. 1 is the utility model external structure schematic diagram;
Fig. 2 be among Fig. 1 A-A to view;
Fig. 3 is the inside perspective view in the utility model front, the first half of the round casing that do not draw among the figure;
Fig. 4 is the inside perspective view at the utility model back side, the latter half of the round casing that do not draw among the figure;
Fig. 5 is the plane structure schematic diagram of Fig. 4;
Fig. 6 is the perspective view of the utility model linking arm;
Fig. 7 is the perspective view of the utility model crank;
Fig. 8 is the perspective view of the right linking arm front side cap of the utility model;
Fig. 9 is the perspective view of the utility model left side linking arm front side cap;
Figure 10 is the perspective view of the utility model torus first half;
Figure 11 is the perspective view of the utility model handwheel;
Figure 12 is the perspective view of embedded part in the utility model handwheel;
Figure 13 is the structural representation of the utility model castle wheel;
Figure 14 is the perspective view of the utility model first cover dish;
Figure 15 is the perspective view of the utility model second cover dish;
Figure 16 is the perspective view of the utility model limited block.
The specific embodiment
The specific embodiment of the present utility model, referring to figs. 1 through Fig. 5, the left linking arm 1 and the right linking arm 2 that comprise hollow, right linking arm 2 ends are provided with round casing 200, linking arm 1 end, a left side is provided with disc 100, disc 100 is matched with in the round casing 200, and be rotatably connected by main shaft 4 and round casing 200, with reference to Fig. 9, front side cap for left linking arm 1, the circumferential edges of disc 100 is provided with first positioning port 101, second positioning port 102 and the 3rd positioning port 103, other is provided with a locating piece 6 that can be matched with in each positioning port, this locating piece 6 is positioned at right linking arm 2 cavitys, and when locating piece 6 was matched with first positioning port 101, left linking arm 1 and right linking arm 2 were in line, when locating piece 6 is matched with second positioning port 102, left side linking arm 1 and 2 one-tenth one right angles of right linking arm, when locating piece 6 was matched with the 3rd positioning port 103, left linking arm 1 and right linking arm 2 were in an acute angle.
With reference to Fig. 8, be right linking arm 2 front side caps, right linking arm 2 two sides and locating piece 6 corresponding positions are provided with chute 202, and locating piece 6 dual-sides are slidedly arranged in the chute 202; Also comprise a crank 14, with reference to Fig. 3 and Fig. 7, first end 1401 of this crank 14 is rotationally connected with the end of locating piece 6, the middle part 1402 of crank 14 is rotationally connected with in the right linking arm 2 by a bearing pin 17, second end 1403 of crank 14 is provided with a trepanning 1404, be arranged with torsion spring 16 on this bearing pin 17, these torsion spring 16 1 elongated ends are fastened on crank 14 first ends 1401 tops, the other end relies on right linking arm 2 inner bottom surfaces, thereby first end 1401 of crank 14 can be compressed to disc 100 directions, be sticked in arbitrary positioning port thereby locating piece 6 can be compressed, other has a linking arm 15, with reference to Fig. 3 and Fig. 6, first end 1501 of this linking arm 15 is a circular protrusions that makes progress 1501, this circular protrusions 1501 is movably set in the trepanning 1404 of second end 1403 of crank 14, the middle part 1502 of linking arm 15 is sheathed on the main shaft 4 rotationally, second end of linking arm 15 is provided with outward extending convex extension part 1503, corresponding site is provided with the circular arc storage tank 201 that holds this convex extension part 1503 on the round casing 200, and its convex extension part 1503 can be movable in circular arc storage tank 201 when linking arm 15 rotates.
Also be arranged with the first cover dish 18 and the second cover dish 19 on the main shaft 4, with reference to Fig. 4, Figure 14 and Figure 15, be respectively equipped with the arc chute 1802 and 1902 of working in coordination on the circumference of the first cover dish 18 and the second cover dish 19, be equipped with a positioning rod 20 in this arc chute 1802 and 1902, backstay 20 is fixed between the two side of round casing 200, the first cover dish 18 is provided with the first cover bar 1803 and the second cover bar 1804 that protrudes out along radial direction, the second cover dish 19 is provided with the 3rd cover bar 1904 and the connecting rod 1903 that protrudes out along radial direction, the first cover bar 1803, the second cover bar 1804, the 3rd cover bar 1904 corresponds respectively to first positioning port 101, second positioning port 102, the 3rd positioning port 103, the first cover bar 1803 and the 3rd cover bar 1904 convexedly stretch in outside disc 100 circumferential edges, the second cover bar, 1804 ends are an oblique cambered surface, this oblique cambered surface is concordant with disc 100 circumferential edges or be positioned at disc 100 circumferential edges by a side of first positioning port 101, and opposite side convexedly stretches in outside disc 100 circumferential edges.
When locating piece 6 is matched with first locating notch 101, left side linking arm 1 and right linking arm 2 are a straight line, the arc chute 1802 and 1902 of the first cover dish 18 and the second cover dish 19 overlaps each other, the first cover bar 1803 relies on the upside of locating piece 6, at this moment, the second cover bar 1804 is positioned at the side near first positioning port 101 of second positioning port 102, the 3rd cover bar 1904 and the 3rd locating notch 103 are overlapping, connecting rod 1903 is between the first cover bar 1803 and the second cover bar 1804, be provided with an extension spring 21 between the first cover bar 1803 and the connecting rod 1903, collude on the hanging hole 1805 and the hanging hole 1905 on the connecting rod 1903 that is hung on the first cover bar 1803 at the two ends of this extension spring 21, and be respectively equipped with the flat face 1806 and 1906 of stepping down to extension spring 21 on the circumference of the first cover dish 18 and the second cover dish 19.
The course of work of the first cover dish 18 and the second cover dish 19 is as follows: first, when locating piece 6 skids off from first positioning port under crank 14 drives and break away from the leaning of the first cover bar 1803, the first cover bar 1803 turns under the effect of extension spring 21 and first positioning port, 101 position overlapped, the second cover bar 1804 also turns to and second positioning port, 102 position overlapped, locating piece 6 can not slip in first positioning port 101 again, and this moment, this hinge was in state free to rotate; The second, to second positioning port, 102 turning joints, locating piece 6 is between first positioning port 101 and second positioning port 102; The 3rd, continuation is rotated to second positioning port, 102 directions, because the oblique globoidal structure of the second cover bar, 1804 ends, locating piece 6 slips over the second cover bar 1804, and arrive between second positioning port 102 and the 3rd positioning port 103, rotate round about again, can back promote the second cover bar 1804, and slip in second positioning port 1804; The 4th, when locating piece 6 reaches between second positioning port 102 and the 3rd positioning port 103, continue to rotate to the 3rd positioning port 103, can promote the 3rd cover bar 1904 and enter the 3rd positioning port 103; The 5th, when locating piece 6 is between first positioning port 101 and second positioning port 102, toward back rotation, can promotes the first cover bar 1803 and enter first positioning port; The 6th, when locating piece 6 skidded off from second positioning port 102, the second cover bar 102 turned under the effect of spring 21 and second positioning port, 102 position overlapped; The 7th, when locating piece 6 skidded off from the 3rd positioning port 103, the 3rd cover bar 103 turned under the effect of spring 21 and the 3rd positioning port 103 position overlapped.
The disc 100 of linking arm 1 end, a left side is a double-decker, folder is established a torus 13 between its double-decker, the radius of this torus 13 is greater than the radius of disc 100, locating piece 6 should be ∩ shape structure mutually, its A/F equals the thickness of torus 13, its two foot can insert in the positioning port in torus 13 both sides, torus 13 is a double-decker, its individual layers is with reference to Figure 10, the upper left side of its outer circumference surface has circular arc cutaway 1301, and its inner periphery is provided with three locating convex blocks 1302, with reference to Fig. 9, the double-decker corresponding position of disc 100 is provided with three locating holes 104 and cooperates with it, and itself and disc 100 are fixed.
With reference to Fig. 4 and Figure 16, the right linking arm 2 top edges limited block 5 that is pivoted, this limited block 5 is provided with a crozier 501 and two ears 502 that extend downwards, crozier 501 middle parts are provided with recess 503, and this crozier 501 is fastened in the circular arc cutaway 1301 of aforementioned torus 13 upper left sides by its recess 503.When left linking arm 1 and right linking arm 2 in line the time, it is folding that limited block 5 can play the restriction hinge.
See figures.1.and.2 and Figure 11, Figure 12, Figure 13, be provided with handwheel 3 in round casing 200 1 sides, this handwheel 3 is embedded with interior embedded part 305, be provided with clutch discs 7 in the handwheel 3, handwheel 3 and clutch discs 7 all are bowl-shape, its openend is fit in opposite directions, cooperating of locating hole 203 on the underrun locating convex block 77 of clutch discs 7 and the round casing 200 and not relatively rotating with round casing 200, clutch discs 7 be provided with round casing 200 on the overlapping deep-slotted chip breaker 78 of circular arc storage tank 201, the sidewall edge of clutch discs 7 is provided with the annular edge 79 that outwards protrudes out, the external diameter of this annular edge 79 is slightly less than the internal diameter of handwheel 3, this annular edge 79 is provided with three clutch slot 71 to handwheel 3 one sides depression, 72 and 73, the inside wall edge of handwheel 3 is provided with the button portion 302 of three the relied on clutch discs that inwardly protrudes out 7 lateral walls, 303 and 304, this button portion 302,303 and 304 one by one corresponding matching in clutch slot 71, in 72 and 73, also be provided with stage clip 8 between clutch discs 7 and the handwheel 3.When button portion 302,303 and 304 when corresponding matching is in clutch slot 71,72 and 73 one by one, handwheel 3 and clutch discs 7 relative fixed and rotatable are pressed handwheel 3, make button portion 302,303 and 304 break away from clutch slot 71,72 and 73, and handwheel 3 is promptly rotatable.The inboard, bottom surface of handwheel 3 is provided with a trepanning 301, and the outward extending convex extension part 1503 of linking arm 15 second ends is passed deep-slotted chip breaker 78 and is inserted in this trepanning 301, thereby the rotation of handwheel 3 can drive this convex extension part 1503 and rotate, thereby drives locating piece 6 actions.Also be provided with on the annular edge 79 of clutch discs 7 three with handwheel 3 in button portion 302,303 and 304 installation opening 74,75 and 76 one to one, use when being used for handwheel 3 with clutch discs 7 assemblings.
Above-mentioned only is a preferred embodiment of the present utility model, but design concept of the present utility model is not limited to this, allly utilizes change that is equal to of this unsubstantiality of being carried out of design or simple replacement all should belong to protection domain of the present utility model.
Claims (6)
1, the locating hinge structure that is used for folding ladder, the right linking arm and the left linking arm that comprise hollow, right linking arm end is provided with round casing, linking arm end, a left side is provided with disc, disc is matched with in the round casing, and be rotatably connected by main shaft and round casing, the circumferential edges of disc is provided with some positioning ports, other is provided with a locating piece that can be matched with in the positioning port, it is characterized in that: this locating piece is positioned at right linking arm cavity, right linking arm two side corresponding site is provided with chute, and the locating piece dual-side is slidedly arranged in the chute; Also comprise a crank, first end of this crank is rotationally connected with the end of locating piece, and the middle part of crank is rotationally connected with in the right linking arm by a bearing pin, is arranged with the torsion spring that crank first end can be compressed to the disc direction on this bearing pin; Other has a linking arm, and first end of this linking arm and second end of crank flexibly connect, and the middle part of linking arm is sheathed on the main shaft rotationally, and second end of linking arm is provided with outward extending convex extension part, and corresponding site is provided with the circular arc storage tank on the round casing; Also being provided with one can main shaft be the handwheel that rotate at the center, be provided with in this handwheel can with the grooving of the mutual fit in convex extension part on the linking arm.
2, the locating hinge structure that is used for folding ladder as claimed in claim 1, it is characterized in that: described positioning port has three, a left side linking arm and right linking arm when locating piece is matched with first positioning port in line, when being matched with second locating notch, locating piece becomes a right angle, and in an acute angle when locating piece is matched with the 3rd locating notch.
3, the locating hinge structure that is used for folding ladder as claimed in claim 2, it is characterized in that: also being provided with two can main shaft be the cover dish that rotate at the center, the circumference of the first cover dish and the second cover dish is provided with the arc chute of working in coordination, be equipped with a positioning rod in this arc chute, backstay is fixed in the two side of round casing, the first cover dish is provided with corresponding to the first cover bar of first positioning port and second positioning port and the second cover bar, the first cover bar convexedly stretches in outside the disc circumferential edges, the second cover boom end is an oblique cambered surface, this oblique cambered surface concordant with the disklike body circumferential edges or be positioned at the disc circumferential edges by a side of first positioning port, opposite side convexedly stretches in outside the disc circumferential edges, the second cover dish is provided with the 3rd cover bar and connecting rod corresponding to the 3rd positioning port, connecting rod is between the first cover bar and the second cover bar, the 3rd cover boom end convexedly stretches in outside the disc circumferential edges, is provided with an extension spring between the first cover bar and the connecting rod.
4, the locating hinge structure that is used for folding ladder as claimed in claim 1, it is characterized in that: the disc of described left linking arm end is a double-decker, folder is established a torus between its double-decker, this toric radius is greater than the radius of disc, described locating piece should be ∩ shape structure mutually, its A/F equals toric thickness, its two foot can insert in the positioning port in the torus both sides, the upper left side of torus outer circumference surface has the circular arc mouth, the right linking arm top edge limited block that is pivoted, this limited block is provided with a crozier, and crozier can be fastened in the circular arc mouth.
5, the locating hinge structure that is used for folding ladder as claimed in claim 1, it is characterized in that: be provided with clutch discs in the handwheel, it is bowl-shape that handwheel and clutch discs all are, its openend is fit in opposite directions, the round casing lateral surface is fixed in the bottom surface of clutch discs, and be provided with round casing on the overlapping deep-slotted chip breaker of circular arc storage tank, the sidewall edge of clutch discs is provided with the annular edge that outwards protrudes out, the external diameter of this annular edge is slightly less than the internal diameter of handwheel, this annular edge is provided with some clutch slot to handwheel one side depression, the inside wall edge of handwheel is provided with the button portion of some relied on clutch discs lateral walls that inwardly protrude out, this button portion corresponding matching one by one is provided with stage clip between clutch discs and the handwheel in clutch slot.
6, the locating hinge structure that is used for folding ladder as claimed in claim 1 is characterized in that: also be provided with the button portion installation opening one to one in some and the handwheel on the annular edge of described clutch discs.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420038624 CN2677574Y (en) | 2004-02-19 | 2004-02-19 | Positioning hinge structure for folding ladder |
| US10/985,818 US7140072B2 (en) | 2003-11-11 | 2004-11-10 | Lockable ladder hinge |
| PCT/CN2004/001290 WO2005045172A1 (en) | 2003-11-11 | 2004-11-11 | A locating hinge for folding ladder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420038624 CN2677574Y (en) | 2004-02-19 | 2004-02-19 | Positioning hinge structure for folding ladder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2677574Y true CN2677574Y (en) | 2005-02-09 |
Family
ID=34583977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420038624 Expired - Lifetime CN2677574Y (en) | 2003-11-11 | 2004-02-19 | Positioning hinge structure for folding ladder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2677574Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104118574A (en) * | 2013-04-27 | 2014-10-29 | 陕西飞机工业（集团）有限公司 | Folding mechanism of plane working ladder |
| CN106114899A (en) * | 2016-07-01 | 2016-11-16 | 陕西飞机工业（集团）有限公司 | A kind of interior support arm of aircraft working stand fold mechanism |
| CN110030256A (en) * | 2019-05-27 | 2019-07-19 | 福州大学 | The more detent linkages of pressure-rotary and its detent method |
| CN110043184A (en) * | 2018-01-15 | 2019-07-23 | 崇友实业股份有限公司 | Elevator machine cheats ladder |
-
2004
- 2004-02-19 CN CN 200420038624 patent/CN2677574Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104118574A (en) * | 2013-04-27 | 2014-10-29 | 陕西飞机工业（集团）有限公司 | Folding mechanism of plane working ladder |
| CN106114899A (en) * | 2016-07-01 | 2016-11-16 | 陕西飞机工业（集团）有限公司 | A kind of interior support arm of aircraft working stand fold mechanism |
| CN110043184A (en) * | 2018-01-15 | 2019-07-23 | 崇友实业股份有限公司 | Elevator machine cheats ladder |
| CN110030256A (en) * | 2019-05-27 | 2019-07-19 | 福州大学 | The more detent linkages of pressure-rotary and its detent method |
| CN110030256B (en) * | 2019-05-27 | 2024-01-30 | 福州大学 | Pressure-rotation type multi-clamping-position hinge mechanism and clamping method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20140219 Granted publication date: 20050209 |