WO2021109845A1 - 用于折叠梯的转动控制机构及折叠梯 - Google Patents

用于折叠梯的转动控制机构及折叠梯 Download PDF

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Publication number
WO2021109845A1
WO2021109845A1 PCT/CN2020/128929 CN2020128929W WO2021109845A1 WO 2021109845 A1 WO2021109845 A1 WO 2021109845A1 CN 2020128929 W CN2020128929 W CN 2020128929W WO 2021109845 A1 WO2021109845 A1 WO 2021109845A1
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WO
WIPO (PCT)
Prior art keywords
rotating member
locking pin
locking
pin
ladder
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Application number
PCT/CN2020/128929
Other languages
English (en)
French (fr)
Inventor
朱雪林
姚柏松
刘卫强
Original Assignee
江苏宙际杰智能科技股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 江苏宙际杰智能科技股份有限公司 filed Critical 江苏宙际杰智能科技股份有限公司
Priority to US17/782,668 priority Critical patent/US20230008962A1/en
Priority to EP20895107.9A priority patent/EP4063608A4/en
Publication of WO2021109845A1 publication Critical patent/WO2021109845A1/zh

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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
    • E06C1/14—Ladders capable of standing by themselves
    • E06C1/16—Ladders capable of standing by themselves with hinged struts which rest on the ground
    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06C—LADDERS
    • E06C7/00—Component parts, supporting parts, or accessories
    • E06C7/50—Joints or other connecting parts
    • 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
    • E06C1/32—Ladders with a strut which is formed as a ladder and can be secured in line with the ladder
    • 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
    • E06C1/383—Foldable ladders in which the longitudinal members are brought together on folding

Definitions

  • the utility model relates to a ladder, in particular to a rotation control mechanism for a folding ladder and a folding ladder.
  • a folding ladder design is adopted.
  • the foldable ladders on both sides can be unfolded to form a longer climbing range; it can also be folded at different angles to adapt to various small-distance climbing ranges, or to facilitate transportation and storage.
  • buttons and handles are distributed on both sides of the two rotating parts, the locking pin is fixed to the handle, and the locking pin passes through the two rotating parts at the same time to fix the two rotating parts.
  • the button pushes the locking pin to exit at least one rotating part, so that the two rotating parts can rotate. After the two rotating parts are rotated to a required angle, push the handle to re-pass the locking pin through the two rotating parts at the same time. Because it is necessary to align the locking holes of the two rotating parts when pushing the handle, the operation is not very convenient; and the parts at the joints are mainly metal elements, which require a lot of pushing force of the handle, which is difficult for the user to use.
  • the purpose of the present utility model is to overcome the above-mentioned shortcomings in the prior art, and provide a rotation control mechanism for folding ladders and folding ladders, which have a simple structure, and the two rotation parts of the rotation control mechanism for folding ladders It can be automatically locked after turning to the required angle.
  • a rotation control mechanism for folding ladders comprising a first rotation part, a second rotation part and a first locking pin; the first rotation part is provided with a pin hole , The second rotating member is provided with a locking hole; the first locking pin is inserted into the pin hole and the locking hole to lock the first rotating member and the second rotating member;
  • the first locking pin and the first rotating member are axially movably arranged with a circumferential limit
  • the first elastic member is connected with the first locking pin and applies a force for inserting the first locking pin into the locking hole;
  • the second rotating part is provided with a trigger part
  • the first rotating member is provided with an elastic braking portion
  • the first locking pin exits the locking hole, and the elastic braking portion abuts against the first rotating member, the first rotating member and the second rotating member are rotatable; the first rotating member and the second rotating member During the rotation of the member, the trigger portion pushes the elastic braking portion to elastically retract, the elastic braking portion is no longer hindered by the first rotating member, and the first locking pin is inserted into the locking hole after corresponding to the position of the locking hole.
  • it also includes an operating member and a center pin; the first rotating member and the second rotating member are rotatably connected by a center pin; the operating member is fixed to the first locking pin after penetrating the center pin, and the operating member is connected to the center pin Coaxially arranged; the operating member pushes the first locking pin to move away from the locking hole.
  • the first elastic member is a spring;
  • the center pin is provided with an accommodating cavity, and the operating member penetrates the accommodating cavity;
  • the spring is sleeved on the operating member and is accommodated in the accommodating cavity.
  • the elastic braking portion includes a second elastic member and a clamping body; the second elastic member abuts on the clamping body and is held by the first locking pin. .
  • the trigger part is a plate, and the plate is provided with an arc surface that can collide with the elastic braking part.
  • the trigger part is a rib protruding from the second rotating part, and the rib is provided with an arc surface that can interfere with the elastic braking part.
  • the space is arranged between the two arc-shaped surfaces; and/or the hole is arranged at the end of the arc-shaped surface.
  • it also includes a second locking pin; the second locking pin and the first locking pin are symmetrically distributed with respect to the rotation axis of the first rotating member and the second rotating member; the first locking pin enters the pin hole and the locking hole at the same time , The second locking pin is inserted into the first rotating part and the second rotating part; while the first locking pin exits the locking hole, the second locking pin exits the second rotating part.
  • the first rotating member includes a first outer plate and a second outer plate
  • the second rotating member is arranged between the first outer plate and the second outer plate
  • the first outer plate and the second outer plate are fixedly connected .
  • the first outer plate is formed with a bead facing the second outer plate, and/or the second outer plate is formed with a bead facing the first outer plate; the bead covers the second rotating member .
  • the second rotating part is formed with a boss facing the first outer plate, and/or the second rotating part is formed with a boss facing the second outer plate.
  • a folding ladder comprising two ladders and two above-mentioned rotation control mechanisms for folding ladders, wherein the top of one ladder is connected to the first rotating member, and the other ladder The top end is connected to the second rotating part.
  • the ladder includes a pedal and two ladder feet, the two ends of the pedal are connected with the ladder feet; the pedal is a hollow isosceles trapezoidal profile.
  • the two waist surfaces of the pedals form concave and convex surfaces.
  • the inner surface of the pedal is formed with three shaft holes, which are respectively located at the inner middle part of the upper sole and the two bottom corners of the pedal.
  • the ladder further includes a washer; the screw passes through the washer, the foot of the ladder and the shaft hole in order to connect the foot of the ladder and the pedal.
  • the rotation control mechanism for the folding ladder and the folding ladder of the utility model through the action between the trigger part, the elastic brake part and the first elastic piece, the two rotation parts of the rotation control mechanism for the folding ladder are mutually rotating It can automatically rebound and lock after reaching the required angle.
  • the structure is simple and easy to use.
  • Figure 1 is a schematic structural view of the rotation control mechanism of the utility model used for folding ladders
  • Figure 2 is a cross-sectional view of the utility model when the rotation control mechanism of the folding ladder is locked
  • Figure 3 is a cross-sectional view of the utility model used for the unlocking process of the rotation control mechanism of the folding ladder
  • Figure 4 is a schematic diagram of the connection between the foot and the pedal of the utility model
  • 61-foot pedal 61a-waist surface, 61b-shaft hole, 62-step foot, 63-washer, 64-screw.
  • the rotation control mechanism for folding ladders of this embodiment includes a first locking pin 51 and a first rotating member 1 and a second rotating member 2 that are rotatably connected.
  • the first rotating member 1 is provided with a pin hole 11
  • the second rotating member 2 is provided with a locking hole 21.
  • the first locking pin 51 is inserted into the pin hole 11 and the locking hole 21 to lock the first rotating member 1 and the second rotating member 2.
  • the first locking pin 51 and the first rotating member 1 are axially movably arranged in a circumferential limit, which means that the first locking pin 51 and the pin hole 11 are basically in a coaxial state, and the first locking pin 51 will not be affected by the first rotating member 1
  • the first locking pin 51 cannot be inserted into the pin hole 11 due to the mutual rotation between the first locking pin 51 and the second rotating member 2; at the same time, it also means that the mutual rotation between the first locking pin 51 and the pin hole 11 is restricted, so that it will not Affects the triggering part 31 to push against the elastic braking part.
  • the first locking pin 51 extends into the pin hole 11, and during the unlocking and locking process of the first rotating member 1 and the second rotating member 2, the first locking pin 51 is axially along the pin hole 11 mobile.
  • the first locking pin 51 is connected to the first elastic member 34.
  • the first elastic member 34 exerts a force to insert the first locking pin 51 into the locking hole 21.
  • the second rotating member 2 is provided with a trigger portion 31.
  • the first rotating member 1 is provided with an elastic braking portion, and preferably, the elastic braking portion extends along the radial direction of the first rotating member 1.
  • the first rotating member 1 and the second rotating member 2 can be Rotate. During the rotation of the first rotating part 1 and the second rotating part 2, the trigger part 31 pushes the elastic brake part to elastically retract, and the elastic brake part is no longer hindered by the first rotating part 1.
  • the first rotating part An elastic member 34 rebounds to drive the first locking pin 51 to move toward the second rotating member 2 until it is abutted by the second rotating member 2. The first rotating member 1 and the second rotating member 2 continue to rotate. After the first locking pin 51 corresponds to the position of the locking hole 21, the first elastic member 34 rebounds to drive the first locking pin 51 to be inserted into the locking hole 21, and the first rotating member 1 And the second rotating part 2 is locked.
  • the first locking pin 1 in the unlocked position, can be completely inserted into the pin hole 11, or partly or completely withdrawn from the pin hole 11. These deformations will not affect the first rotating member 1 and the second rotating member when unlocked.
  • the rotation between 2 is within the protection scope of this utility model.
  • the stroke of the first locking pin 51 can be controlled by pulling the handle on the same side.
  • the handle pulls the first locking pin 51 away from the locking hole 21, the first elastic member 34 is stretched, and the first elastic member 34 is preferably a tension spring.
  • the rotation control mechanism for the folding ladder further includes an operating member 42 and a center pin 41.
  • the first rotating part 1 and the second rotating part 2 are rotatably connected by a center pin 41.
  • the operating member 42 penetrates the center pin 41 and is fixed to the first locking pin 51, and the operating member 42 and the center pin 41 are arranged coaxially.
  • the operating member 42 pushes the first locking pin 51 to move away from the locking hole 21. At this time, the first elastic member 34 is compressed.
  • the first elastic member 34 is a spring.
  • the center pin 41 is provided with a accommodating cavity 41a, and the operating member 42 penetrates the accommodating cavity 41a.
  • the spring is sleeved on the operating member 42 and accommodated in the accommodating cavity 41a.
  • the trigger part 31 is a plate.
  • the plate is provided with an arc surface that can collide with the elastic braking part. That is, during the rotation of the first rotating part 1 and the second rotating part 2, the arc-shaped surface is located on the movement stroke of the elastic brake part, and the elastic brake part is compressed by the arc-shaped surface to retract, and the elastic brake part is retracted to the extent that it does not Then it is obstructed by the first rotating member 1.
  • the plate is an arc-shaped plate. The plate can be fixed to the second rotating part 2 by connecting parts such as fasteners.
  • the triggering portion 31 may also be a raised rib on the second rotating member 2.
  • the rib is provided with an arc surface that can conflict with the elastic braking part.
  • the ribs and the second rotating member 2 are integrally formed.
  • the first locking pin 51 enters different locking holes 21, and the first rotating member 1 and the second rotating member 2 are locked at different relative angles.
  • there are two arc-shaped surfaces one space is provided between the two arc-shaped surfaces, and the other two spaces are provided at both ends of the two arc-shaped surfaces. Therefore, when it is applied to a folding ladder, it can form three states: half-fold, herringbone and one-shaped.
  • the space forms a distance R'.
  • the distance between the arcuate surface and the shaft center is greater than the distance between the first locking pin 51 and the shaft center, so that the first locking pin 51 can rotate relative to the trigger portion 31; meanwhile, the distance between the arcuate surface and the shaft center is less than the distance from the elastic braking portion to the shaft center.
  • the trigger portion 31 is pressed against the elastic braking portion for compression, and the first locking pin 51 is actuated by the elastic force of the first elastic member 34 to abut against the second rotating member 2.
  • there is enough space for the elastic brake part to move in the empty position so that at the unlocked position, the elastic brake part rebounds in the empty position, so that the elastic brake part abuts the first rotating member 1.
  • the elastic braking portion includes a second elastic member 33 and a clamping body 32.
  • the second elastic member 33 abuts against the clamping body 32 and is held by the first locking pin 51.
  • the second elastic member 33 may be an elastic sheet or a spring.
  • the elastic sheet or spring exerts an elastic force on the clamping body 33.
  • the end of the clamping body 33 has a curved surface.
  • the arc surface is a spherical surface.
  • the spherical surface of the clamping body 33 can smoothly transition when it collides with the first rotating member 1 or the trigger portion 31 at the same time.
  • the second elastic member 33 is a spring
  • the clamping body 33 is a steel ball.
  • the first locking pin 51 is provided with an open accommodating cavity.
  • the steel ball is accommodated in the accommodating cavity.
  • the spring abuts between the inner wall of the accommodating cavity and the steel ball.
  • the opening of the accommodating cavity is smaller than the ball diameter of the steel ball, so that the spring and the steel ball are equal Keep on the first locking pin 51.
  • the rotation control mechanism for the folding ladder further includes a second locking pin 52.
  • the second locking pin 52 and the first locking pin 51 are symmetrically distributed with respect to the hinged center of the first rotating part 1 and the second rotating part 2. While the first locking pin 51 enters the pin hole 11 and the locking hole 21, the second locking pin 52 is inserted into the first rotating member 1 and the second rotating member 2. While the first locking pin 51 exits the locking hole 21, the second locking pin 52 exits the second rotating member 2 at the same time.
  • the symmetrical distribution of the first locking pin 52 and the first locking pin 51 makes the first rotating member 1 and the second rotating member 2 more stable when being fixed, and improves the safety of the folding ladder.
  • the first rotating member 1 includes a first outer plate 12 and a second outer plate 13, and the second rotating member 2 is disposed between the first outer plate 12 and the second outer plate 13.
  • the first outer plate 12 and the second outer plate 13 are fixedly connected.
  • the multi-plate arrangement of the first rotating member 1 and/or the multi-plate arrangement of the second rotating member 2 increases the strength of the rotation control mechanism for the folding ladder.
  • the first outer plate 12 is formed with a bead facing the second outer plate 13, or the second outer plate 13 is formed with a bead 14 facing the first outer plate 12.
  • the first outer plate 12 and the second outer plate 13 form opposite curling edges 14, and the curling edges 14 cover the second rotating part 2, that is, between the first rotating part 1 and the second rotating part 2.
  • the gap is covered to prevent debris from falling into the gap.
  • the second rotating part 2 is formed with a boss 22 facing the first outer plate 12, or the second rotating part 2 is formed with a boss 22 facing the second outer plate 13.
  • the second rotating member 2 is formed with a boss 22 facing the first outer plate 12, and the second rotating member 2 is formed with a boss 22 facing the second outer plate 13.
  • the arrangement of the boss 22 improves the integrity of the structure, reduces the installation of the gasket structure, and prevents the loss or omission of small parts such as gaskets.
  • the elastic braking portion corresponds to the empty position at the end of an arc surface, and the elastic braking portion rebounds after exiting the pin hole 11.
  • the thrust acting on the operating member 42 is removed, and the first elastic member 34 drives the first locking pin 51 to rebound part of the stroke until the elastic braking portion abuts the first rotating member 1.
  • the triggering portion 31 pushes the elastic braking portion to elastically retract, and the elastic braking portion is no longer hindered by the first rotating member 1, and the first elastic
  • the rebound of the member 34 drives the first locking pin 51 to move toward the second rotating member 2 until it is abutted by the second rotating member 2.
  • the first rotating member 1 and the second rotating member 2 continue to rotate.
  • the first elastic member 34 drives the first locking pin 51 to be inserted into the locking hole 21.
  • the first rotating member 1 and the second rotating member 2 are locked, and at this time, the elastic braking portion corresponds to the space between the two curved surfaces, and can be unlocked later; at this time, the folding ladder is fixed in a herringbone use state. After subsequent unlocking, the folding ladder can be switched to the one-word state according to the original rotation track.
  • the in-line state is unlocked, the end of the arc-shaped surface has an empty space, and the pressing operating member 42 can make the elastic braking portion abut the first rotating member 1, so that the first rotating member 1 and the second rotating member 2 can be Rotation track revolves.
  • the folding ladder of this embodiment includes two ladders and two above-mentioned rotation control mechanisms for folding ladders.
  • the top of one of the ladders is connected to the first rotating member 1, and the top of the other ladder is connected to the second rotating member 2.
  • the two ladders can be folded in half, formed into a herringbone shape and a straight shape, etc., to be suitable for different occasions.
  • the ladder includes a pedal 61 and two ladder feet 62. Both ends of the pedal 61 are connected to the foot 62 of the ladder.
  • the pedal 61 is a hollow isosceles trapezoidal profile. In the folded state of the folding ladder, one of the waist surfaces 61a is a footrest surface, and in the unfolded state of the folding ladder, the other waist surface 61a may become a footrest surface.
  • the shape of the isosceles trapezoid can easily adapt to the above deformation.
  • the two waist surfaces 61a of the pedal 61 are formed with concave and convex surfaces, which increase the friction of the waist surface 61a and make it safer when pedaling.
  • the inner surface of the footrest 61 is formed with three shaft holes 61b, which are respectively located at the inner middle part and the two bottom corners of the upper sole of the footrest 61.
  • the ladder also includes spacers 63.
  • the screw 64 sequentially passes through the washer 63, the ladder foot 62 and the shaft hole 61b, and connects the ladder foot 62 and the pedal 61.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ladders (AREA)

Abstract

一种用于折叠梯的转动控制机构及折叠梯，该转动控制机构包括第一转动件（1）、第二转动件（2）和第一锁定销（51），第一转动件（1）设有销孔（11），第二转动件（2）设有锁定孔（21），第一锁定销（51）插入销孔（11）和锁定孔（21）锁定第一转动件（1）和第二转动件（2），第一锁定销（51）与第一转动件（1）周向限位轴向活动设置，第一弹性件（34）与第一锁定销（51）相连且施予第一锁定销（51）插入锁定孔（21）的作用力，第二转动件（2）设有触发部（31），第一转动件（1）设有弹性制动部。该折叠梯包括两个梯子和两个该转动控制机构，其中一个梯子的顶部连接第一转动件（1），另一个梯子的顶端连接第二转动件（2）。第一转动件（1）和第二转动件（2）在相互转动至需要的角度后可自动回弹锁止，结构简单，使用方便。

Description

用于折叠梯的转动控制机构及折叠梯 技术领域
本实用新型涉及一种梯子，尤其涉及一种用于折叠梯的转动控制机构及折叠梯。
背景技术
为了扩大梯子的适用范围，采用了折叠梯的设计。可折叠的两侧梯子即可展开，形成更长的可攀爬行程；也可以形成不同角度的折叠，以适应各种小距离的攀爬行程，或方便运输和存储。
在可折叠梯子的可折叠关节处，目前常用的一种形式为按钮和把手分布于两转动部的两侧，锁定销与把手固定，且锁定销同时穿过两转动部以固定两转动部。按钮推动锁定销退出至少一转动部，从而使得两转动部可旋转。在两转动部旋转至需要的角度后，推动把手重新将锁定销同时穿过两转动部。因推动把手时需要将两转动部的锁定孔对齐，操作不是很方便；且关节处各零件均以金属元件为主，需要不少的把手推动力，使用者使用困难。
实用新型内容
本实用新型的目的在于克服现有技术中存在的上述不足，而提供一种用于折叠梯的转动控制机构及折叠梯，结构简单，且用于折叠梯的转动控制机构的两个转动部在转动至需要的角度后可自动锁止。
本实用新型解决上述问题所采用的技术方案是：一种用于折叠梯的转动控制机构，包括第一转动件、第二转动件和第一锁定销；所述第一转动件设有销孔，所述第二转动件设有锁定孔；所述第一锁定销插入销孔和锁定孔锁定第一转动件和第二转动件；
所述第一锁定销与第一转动件周向限位轴向活动设置；
第一弹性件与所述第一锁定销相连且施予第一锁定销插入锁定孔的作用力；
所述第二转动件设有触发部；
所述第一转动件设有弹性制动部；
施予外力所述第一锁定销退出锁定孔，且所述弹性制动部与所述第一转动件抵接，第一转动件和第二转动件可转动；第一转动件和第二转动件转动过程中， 所述触发部抵推所述弹性制动部弹性回缩，弹性制动部不再受第一转动件阻碍，所述第一锁定销与锁定孔位置对应后插入锁定孔。
其中，还包括操作件和中心销；所述第一转动件和第二转动件采用中心销转动相连；所述操作件贯穿所述中心销后与第一锁定销固定，且操作件与中心销同轴设置；所述操作件推动第一锁定销朝远离锁定孔的方向运动。
其中，所述第一弹性件为弹簧；所述中心销设有容纳腔，所述操作件贯穿所述容纳腔；所述弹簧套设于所述操作件且容纳于所述容纳腔。
其中，所述弹性制动部包括第二弹性件以及卡接体；所述第二弹性件抵接于卡接体并保持在第一锁定销。。
其中，所述触发部是板件，所述板件设有可与弹性制动部相抵触的弧形面。
其中，所述触发部是第二转动件上凸起的筋条，所述筋条设有可与弹性制动部相抵触的弧形面。
其中，所述锁定孔有3个，对应3个锁定孔位置分别设有3个弹性制动部不受触发部抵触的空位。
其中，所述弧形面有2个，空位设置于2个弧形面之间；和/或，孔位设置于弧形面的端部。
其中，还包括第二锁定销；所述第二锁定销与第一锁定销关于第一转动件和第二转动件的转动轴对称分布；所述第一锁定销进入销孔和锁定孔的同时，第二锁定销插入第一转动件和第二转动件；第一锁定销退出锁定孔的同时，第二锁定销退出第二转动件。
其中，所述第一转动件包括第一外板和第二外板，所述第二转动件设于第一外板和第二外板之间，第一外板和第二外板固定相连。
其中，所述第一外板形成有朝向第二外板的卷边，和/或，所述第二外板形成有朝向第一外板的卷边；所述卷边覆盖于第二转动件。
其中，所述第二转动件形成有朝向第一外板的凸台，和/或，所述第二转动件形成有朝向第二外板的凸台。
本实用新型解决上述问题还提供的一种技术方案是：一种折叠梯，包括两梯子和两上述的用于折叠梯的转动控制机构，其中一梯子的顶部连接第一转动件，另一梯子的顶端连接第二转动件。
其中，所述梯子包括脚踏和两梯脚，所述脚踏两端连接梯脚；所述脚踏为中空的等腰梯形型材。
其中，所述脚踏的两腰面形成凹凸面。
其中，所述脚踏的内表面形成三个轴孔，分别位于脚踏的上底内侧中部和两底角。
其中，所述梯子还包括垫片；螺丝依次穿过垫片、梯脚和轴孔，连接梯脚和脚踏。
本实用新型的用于折叠梯的转动控制机构和折叠梯，通过触发部、弹性制动部和第一弹性件之间的作用，用于折叠梯的转动控制机构的两个转动部在相互转动至需要的角度后可自动回弹锁止，结构简单，使用方便。
附图说明
图1是本实用新型用于折叠梯的转动控制机构的结构示意图；
图2是本实用新型用于折叠梯的转动控制机构锁止时的剖视图；
图3是本实用新型用于折叠梯的转动控制机构解锁过程中的剖视图；
图4是本实用新型梯脚和脚踏的连接示意图；
1-第一转动件，11-销孔，12-第一外板，13-第二外板，14-卷边；
2-第二转动件，21-锁定孔，22-凸台；
31-触发部，31a-凹槽，32-卡接体，33-第二弹性件，34-第一弹性件；
41-中心销，41a-容纳腔，42-操作件；
51-第一锁定销，52-第二锁定销；
61-脚踏，61a-腰面，61b-轴孔，62-梯脚，63-垫片，64-螺丝。
具体实施方式
下面结合附图并通过实施例对本实用新型作进一步的详细说明，以下实施例是对本实用新型的解释而本实用新型并不局限于以下实施例。
实施例
如图1至3所示，本实施例的用于折叠梯的转动控制机构，包括第一锁定销 51以及转动连接的第一转动件1和第二转动件2。其中，第一转动件1设有销孔11，第二转动件2设有锁定孔21。第一锁定销51插入销孔11和锁定孔21锁定第一转动件1和第二转动件2。
第一锁定销51与第一转动件1周向限位轴向活动设置，既指第一锁定销51与销孔11基本处于同轴状态，第一锁定销51不会因为第一转动件1和第二转动件2之间的相互转动而导致第一锁定销51不能插入销孔11的情况出现；同时也指第一锁定销51与销孔11之间的相互转动存在限制，从而不会影响触发部31对弹性制动部的抵推。优选地，在本实施例中，第一锁定销51伸入销孔11，且在第一转动件1和第二转动件2解锁和锁定过程中，第一锁定销51沿销孔11轴向移动。
第一锁定销51与第一弹性件34相连。第一弹性件34施予第一锁定销51插入锁定孔21的作用力。
第二转动件2设有触发部31。
第一转动件1设有弹性制动部，优选地，弹性制动部沿第一转动件1的径向延伸。
解锁时，施予外力第一锁定销51退出锁定孔21，弹性制动部退出销孔11后回弹与第一转动件1抵接，第一转动件1和第二转动件2之间可转动。在第一转动件1和第二转动件2转动过程中，触发部31抵推弹性制动部弹性回缩，弹性制动部不再受第一转动件1阻碍，在本实施例中，第一弹性件34回弹带动第一锁定销51朝向第二转动件2方向运动直至受第二转动件2抵接。第一转动件1和第二转动件2继续转动，第一锁定销51与锁定孔21位置对应后，第一弹性件34回弹带动第一锁定销51插入锁定孔21，第一转动件1和第二转动件2锁止。
其中，在解锁位，第一锁定销1可以完全地插入于销孔11，也可以部分或完全地退出销孔11，这些变形，并不会影响解锁时第一转动件1和第二转动件2之间的旋转，均在本实用新型的保护范围之内。
第一锁定销51的行程可以通过提拉同侧的把手来施力控制，把手拉动第一锁定销51远离锁定孔21，第一弹性件34受拉伸，第一弹性件34优选为拉簧。在本实施例中，具体的，用于折叠梯的转动控制机构还包括操作件42和中心销 41。第一转动件1和第二转动件2采用中心销41转动相连。操作件42贯穿中心销41后与第一锁定销51固定，且操作件42与中心销41同轴设置。操作件42推动第一锁定销51朝远离锁定孔21的方向运动，此时，第一弹性件34受压缩。优选地，第一弹性件34为弹簧。中心销41设有容纳腔41a，操作件42贯穿容纳腔41a。弹簧套设于操作件42且容纳于容纳腔41a。
在本实例中，触发部31是板件。板件设有可与弹性制动部相抵触的弧形面。即在第一转动件1和第二转动件2转动过程中，弧形面位于弹性制动部的运动行程上，由弧形面压迫弹性制动部回缩，弹性制动部回缩至不再受第一转动件1阻碍。优选地，板件为弧形板。板件可以通过紧固件等连接零件固定于第二转动件2。
触发部31还可以是第二转动件2上凸起的筋条。筋条设有可与弹性制动部相抵触的弧形面。筋条与第二转动件2为一体成型结构。
同时，在解锁处，设置有空位，从而解锁时，弹性制动部回弹时不会受触发部31压缩而导致弹性制动部无法抵制第一转动件1。
其中，可通过设置多个锁定孔21，第一锁定销51进入不同的锁定孔21，第一转动件1和第二转动件2锁止成不同的相对角度。在本实施例中，锁定孔21有3个，对应3个锁定孔21位置分别设有3个弹性制动部不受触发部31抵触的空位。具体地，弧形面有2个，一空位设置于2个弧形面之间，另两空位设于两弧形面的两端。由此，适用于折叠梯时，可形成对折、人字形和一字型三种状态。
以第一转动件1和第二转动件2的转动轴为轴心，空位形成间距R’。弧形面距离轴心的距离大于第一锁定销51距离轴心的距离，从而第一锁定销51可相对触发部31旋转；同时弧形面距离轴心的距离小于弹性制动部距离轴心的距离，从而触发部31抵推弹性制动部压缩，第一锁定销51受第一弹性件34的弹性力动作至抵接第二转动件2。另一方面，空位处留有弹性制动部足够的运动空间，从而在解锁处，弹性制动部在空位处回弹，从而弹性制动部抵接第一转动件1。
弹性制动部包括第二弹性件33以及卡接体32。第二弹性件33抵接卡接体32并保持在第一锁定销51。第二弹性件33可以是弹性片或弹簧。弹性片或弹簧对卡接体33施予弹性作用力。作为优选，卡接体33端部具有弧面。作为优选，弧面为球形面。卡接体33的球形面可同时在与第一转动件1或触发部31抵触作 用时能够平滑过渡。在本实施例中，第二弹性件33为弹簧，卡接体33为钢珠。第一锁定销51设有开口的容纳腔，钢珠容纳于容纳腔中，弹簧抵接于容纳腔的内壁和钢珠之间，同时，容纳腔的开口小于钢珠的球体直径，从而将弹簧和钢珠均保持在第一锁定销51。
优选地，用于折叠梯的转动控制机构还包括第二锁定销52。第二锁定销52与第一锁定销51关于第一转动件1和第二转动件2的铰接中心对称分布。第一锁定销51进入销孔11和锁定孔21的同时，第二锁定销52插入第一转动件1和第二转动件2。第一锁定销51退出锁定孔21的同时，第二锁定销52退出第二转动件2。第一锁定销52和第一锁定销51的对称分布，使得第一转动件1和第二转动件2固定时更加稳定，提高折叠梯的安全性。
第一转动件1包括第一外板12和第二外板13，第二转动件2设于第一外板12和第二外板13之间。第一外板12和第二外板13固定相连。第一转动件1的多板设置和/或第二转动件2的多板设置，增加了用于折叠梯的转动控制机构处的强度。
第一外板12形成有朝向第二外板13的卷边，或第二外板13形成有朝向第一外板12的卷边14。在本实施例中，第一外板12和第二外板13形成相对的卷边14，卷边14覆盖于第二转动件2，即将第一转动件1和第二转动件2之间的间隙覆盖，从而避免杂物落入间隙。
第二转动件2形成有朝向第一外板12的凸台22，或，第二转动件2形成有朝向第二外板13的凸台22。在本实施例中，第二转动件2形成有朝向第一外板12的凸台22，且第二转动件2形成有朝向第二外板13的凸台22。凸台22的设置，提高了结构的整体性，减少了垫片结构的安装，也防止了垫片等小零件的遗失或漏装等情况。
具体的，在本实施方式中：当用户需要将折叠梯从折叠状态展开至使用状态时，首先，对折叠状态进行解锁，抵推操作件42，第一弹性件34受压缩，第一锁定销51受力退出一锁定孔21，此时，弹性制动部对应一弧形面端部的空位，弹性制动部退出销孔11后回弹。撤去作用于操作件42的推力，第一弹性件34带动第一锁定销51回弹部分行程直至弹性制动部与第一转动件1抵接。在第一转动件1和第二转动件2转动至人字形的过程中，触发部31抵推弹性制动部弹 性回缩，弹性制动部不再受第一转动件1阻碍，第一弹性件34回弹带动第一锁定销51朝向第二转动件2方向运动直至受第二转动件2抵接。第一转动件1和第二转动件2继续转动，第一锁定销51与人字形展开对应的锁定孔21位置对应后，第一弹性件34带动第一锁定销51插入该锁定孔21，第一转动件1和第二转动件2锁止，且此时弹性制动部对应两弧形面之间的空位，后续可以解锁；此时，折叠梯固定为人字形使用状态。后续解锁后按原转动轨迹，折叠梯可切换到一字状态。在一字状态解锁时，弧形面端部具有空位，抵推操作件42可使弹性制动部与第一转动件1抵接，从而第一转动件1和第二转动件2可按原转动轨迹回转。
如图1至4所示，本实施例的折叠梯，包括两梯子和两上述的用于折叠梯的转动控制机构。其中一梯子的顶部连接第一转动件1，另一梯子的顶端连接第二转动件2。通过第一转动件1和第二转动件2之间的旋转和固定，两梯子可以对折、形成人字形和一字型等不同的形式以适用不同的场合。
梯子包括脚踏61和两梯脚62。脚踏61两端连接梯脚62。脚踏61为中空的等腰梯形型材。在折叠梯的折叠状态下，其中一腰面61a为脚踏面，而在折叠梯的展开状态下，另一腰面61a存在成为脚踏面的可能性。等腰梯形的形状设置，可以简便地适应以上的变形。
脚踏61的两腰面61a形成凹凸面，增加了腰面61a的摩擦性，脚踏时更安全。
脚踏61的内表面形成三个轴孔61b，分别位于脚踏61的上底内侧中部和两底角。
梯子还包括垫片63。螺丝64依次穿过垫片63、梯脚62和轴孔61b，连接梯脚62和脚踏61。
本说明书中所描述的以上内容仅仅是对本实用新型所作的举例说明。本实用新型所属技术领域的技术人员可以对所描述的具体实施例做各种各样的修改或补充或采用类似的方式替代，只要不偏离本实用新型说明书的内容或者超越本权利要求书所定义的范围，均应属于本实用新型的保护范围。

Claims (17)

  1. 用于折叠梯的转动控制机构，包括第一转动件、第二转动件和第一锁定销；所述第一转动件设有销孔，所述第二转动件设有锁定孔；所述第一锁定销插入销孔和锁定孔锁定第一转动件和第二转动件，其特征在于，
    所述第一锁定销与第一转动件周向限位轴向活动设置；
    第一弹性件与所述第一锁定销相连且施予第一锁定销插入锁定孔的作用力；
    所述第二转动件设有触发部；
    所述第一转动件设有弹性制动部；
    施予外力所述第一锁定销退出锁定孔，且所述弹性制动部与所述第一转动件抵接，第一转动件和第二转动件可转动；第一转动件和第二转动件转动过程中，所述触发部抵推所述弹性制动部弹性回缩，弹性制动部不再受第一转动件阻碍，所述第一锁定销与锁定孔位置对应后插入锁定孔。
  2. 根据权利要求1所述的用于折叠梯的转动控制机构，其特征在于，还包括操作件和中心销；所述第一转动件和第二转动件采用中心销转动相连；所述操作件贯穿所述中心销后与第一锁定销固定，且操作件与中心销同轴设置；所述操作件推动第一锁定销朝远离锁定孔的方向运动。
  3. 根据权利要求2所述的用于折叠梯的转动控制机构，其特征在于，所述第一弹性件为弹簧；所述中心销设有容纳腔，所述操作件贯穿所述容纳腔；所述弹簧套设于所述操作件且容纳于所述容纳腔。
  4. 根据权利要求1或2所述的用于折叠梯的转动控制机构，其特征在于，所述弹性制动部包括第二弹性件以及卡接体；所述第二弹性件抵接卡接体并保持在第一锁定销。
  5. 根据权利要求1所述的用于折叠梯的转动控制机构，其特征在于，所述触发部是板件，所述板件设有可与弹性制动部相抵触的弧形面。
  6. 根据权利要求1所述的用于折叠梯的转动控制机构，其特征在于，所述触发部是第二转动件上凸起的筋条，所述筋条设有可与弹性制动部相抵触的弧形面。
  7. 根据权利要求5或6所述的用于折叠梯的转动控制机构，其特征在于，所述锁定孔有3个，对应3个锁定孔位置分别设有3个弹性制动部不受触发部抵触的空位。
  8. 根据权利要求7所述的用于折叠梯的转动控制机构，其特征在于，所述弧形面有2个，空位设置于2个弧形面之间；和/或，孔位设置于弧形面的端部。
  9. 根据权利要求1或2所述的用于折叠梯的转动控制机构，其特征在于，还包括第二锁定销；所述第二锁定销与第一锁定销关于第一转动件和第二转动件的转动轴对称分布；所述第一锁定销进入销孔和锁定孔的同时，第二锁定销插入第一转动件和第二转动件；第一锁定销退出锁定孔的同时，第二锁定销退出第二转动件。
  10. 根据权利要求1或2所述的用于折叠梯的转动控制机构，其特征在于，所述第一转动件包括第一外板和第二外板，所述第二转动件设于第一外板和第二外板之间，第一外板和第二外板固定相连。
  11. 根据权利要求10所述的用于折叠梯的转动控制机构，其特征在于，所述第一外板形成有朝向第二外板的卷边，和/或，所述第二外板形成有朝向第一外板的卷边；所述卷边覆盖于第二转动件。
  12. 根据权利要求10所述的用于折叠梯的转动控制机构，其特征在于，所述第二转动件形成有朝向第一外板的凸台，和/或，所述第二转动件形成有朝向第二外板的凸台。
  13. 一种折叠梯，其特征在于，包括两梯子和两上述权利要求1-12任一项权利要求所述的用于折叠梯的转动控制机构，其中一梯子的顶部连接第一转动件，另一梯子的顶端连接第二转动件。
  14. 根据权利要求13所述的折叠梯，其特征在于，所述梯子包括脚踏和两梯脚，所述脚踏两端连接梯脚；所述脚踏为中空的等腰梯形型材。
  15. 根据权利要求14所述的折叠梯，其特征在于，所述脚踏的两腰面形成凹凸面。
  16. 根据权利要求14或15所述的折叠梯，其特征在于，所述脚踏的内表面形成三个轴孔，分别位于脚踏的上底内侧中部和两底角。
  17. 根据权利要求14或15所述的折叠梯，其特征在于，所述梯子还包括垫片；螺丝依次穿过垫片、梯脚和轴孔，连接梯脚和脚踏。
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CN211819206U (zh) * 2019-12-05 2020-10-30 江苏宙际杰智能科技股份有限公司 用于折叠梯的转动控制机构及折叠梯
CN216767249U (zh) * 2021-01-25 2022-06-17 江苏宙际杰智能科技股份有限公司 一种多功能梯关节
CN114482840A (zh) * 2021-12-31 2022-05-13 江苏宙际杰智能科技股份有限公司 一种关节及应用该关节的梯子
CN114233171A (zh) * 2022-01-20 2022-03-25 天津市金锚家居用品有限公司 可折叠梯具
WO2023230368A1 (en) * 2022-05-27 2023-11-30 Little Giant Ladder Systems, Llc Multifunction button for ladder adjustment

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