CN214118042U - Pedal ladder lock catch convenient to unlock - Google Patents

Abstract

The application relates to a pedal ladder lock catch convenient to unlock, which is arranged at the front end of a pedal ladder; the pedals are rotatably arranged on the main ladder frame of the pedal ladder, and the front ends of the pedals are arranged corresponding to the auxiliary ladder frame of the pedal ladder; the lock catch unlocks and locks a cross beam on the auxiliary ladder frame; the lock catch comprises an unlocking plate, a first pin shaft, a second pin shaft, a third pin shaft, a torsion spring, a first lock hook and a second lock hook; during unlocking, the unlocking plate is lifted to drive the first locking hook and the second locking hook to rotate, the hook-shaped parts of the first locking hook and the second locking hook are separated from the cross beam to unlock, and the lock catch has the advantages that the unlocking mode meets the operation habit of people, the operation is simple, and the lock catch is simple in structure.

Description

Pedal ladder lock catch convenient to unlock

Technical Field

The utility model relates to a ladder utensil field, concretely relates to hasp structure at footboard position in footboard ladder.

Background

The footboard ladder is a double ladder, and the footboard ladder has mutual articulated main ladder frame and vice ladder frame, is equipped with a footboard between main ladder frame and vice ladder frame, and for convenient to use, main ladder frame, vice ladder frame and the footboard of footboard ladder can be folded and accomodate. Under the user state, footboard one side is articulated with main ladder frame, and the opposite side overlap joint is equipped with the hasp on the crossbeam on vice ladder frame, can be with the footboard locking on the crossbeam, and after the use, the unblock is and the footboard is turned up, merges main ladder frame and vice ladder frame, accomplishes folding.

But the hasp structure of current footboard ladder is comparatively complicated, and the installation is inconvenient, and is not conform to people's operation custom when locking and unblock, like in a patent that application number is 2010201937396, discloses a board ladder turns over, need operate its unblock switch that is located one side earlier when the unblock, goes the unblock again, and the operation of unblock and folding board of turning over can not go on simultaneously, uses to experience not good.

Therefore, how to solve the above-mentioned deficiencies of the prior art is a problem to be solved by the present invention.

Disclosure of Invention

The utility model aims at providing a pedal ladder hasp convenient to unblock

In order to achieve the above purpose, the utility model adopts the technical scheme that:

a pedal ladder lock catch convenient for unlocking is arranged at the front end of a pedal ladder; the pedals are rotatably arranged on the main ladder frame of the pedal ladder, and the front ends of the pedals are arranged corresponding to the auxiliary ladder frame of the pedal ladder; the lock catch unlocks and locks a cross beam on the auxiliary ladder frame, and the cross beam is horizontally arranged;

the lock catch comprises an unlocking plate, a first lock hook and a second lock hook;

the front end part of the unlocking plate is an unlocking action part, a first pin shaft penetrates through the rear end part of the unlocking plate along the horizontal direction, and the first pin shaft is rotationally positioned in the pedal so as to form the rotational connection of the unlocking plate and the pedal;

the lock catch further comprises an elastic element, and the elastic element acts between the pedal and the unlocking plate;

the first lock hook is provided with a hook part, and the first lock hook is rotatably positioned on the pedal on one hand and is rotatably connected to the left side of the unlocking plate on the other hand;

the second locking hook is provided with a hook-shaped part and is rotationally positioned on the pedal on one hand and is rotationally connected to the right side of the unlocking plate on the other hand;

on the pedal, a rotating shaft of a part where the first locking hook and the second locking hook are rotatably connected with the pedal is parallel to the first pin shaft and is positioned in front of the first pin shaft.

Furthermore, the lower end of the first lock hook is a hook-shaped part, the left side of the upper end of the first lock hook is rotatably positioned on the pedal, the right side of the first lock hook is rotatably connected to the left side of the unlocking plate, and the rotary connection part is positioned between the upper end and the lower end of the first lock hook; the distance between the rotary connecting part of the first lock hook and the unlocking plate and the hook-shaped part of the first lock hook is shorter than the distance between the rotary connecting part of the first lock hook and the pedal and the hook-shaped part of the first lock hook, in the rotating process, the first lock hook main body forms a lever, the rotary connecting part of the first lock hook and the pedal forms a fulcrum, the rotary connecting part of the first lock hook and the unlocking plate forms a force application point, and the hook-shaped part of the first lock hook is an action point to form a labor-consuming lever structure;

the lower end of the second lock hook is a hook-shaped part, the right side of the upper end of the second lock hook is rotatably positioned on the pedal, the left side of the second lock hook is rotatably connected to the right side of the unlocking plate, and the rotary connection part is positioned between the upper end and the lower end of the second lock hook; the distance between the rotary connecting part of the second lock hook and the unlocking plate and the hook-shaped part of the second lock hook is shorter than the distance between the rotary connecting part of the second lock hook and the pedal and the hook-shaped part of the second lock hook.

Furthermore, the lock catch further comprises a second pin shaft and a third pin shaft;

the second pin shaft penetrates through the first lock hook along the left-right direction, and the second pin shaft is rotatably positioned in the pedal, so that the first lock hook is rotatably connected with the pedal;

the third pin shaft penetrates through the second lock hook along the left-right direction, and the third pin shaft is rotatably positioned in the pedal, so that the second lock hook is rotatably connected with the pedal;

the second pin shaft and the third pin shaft are both parallel to the first pin shaft and are positioned in front of the first pin shaft;

the first locking hook and the second locking hook may be rotationally connected with the pedal through the same rotating shaft, or the first locking hook and the second locking hook may be rotationally connected with the pedal through respective rotating shafts (the rotating shaft may be a pin shaft, or may be a shaft-shaped part such as other optical axis or a bolt).

Furthermore, a first connecting shaft extending to the left side is arranged on the left side of the unlocking plate, and a second connecting shaft extending to the right side is arranged on the right side of the unlocking plate;

a convex block is arranged on the front side of the first lock hook and positioned between the second pin shaft and the hook-shaped part of the first lock hook, a first connecting hole matched with the first connecting shaft is formed in the convex block, the first connecting hole is an oblong hole, and the first connecting shaft is arranged in the first connecting hole in a penetrating mode, so that the first lock hook is rotationally connected with the unlocking plate;

the front side of the second lock hook is provided with a convex block, the convex block is positioned between the third pin shaft and the hook-shaped part of the second lock hook, the convex block is provided with a second connecting hole matched with the second connecting shaft, the second connecting hole is an oblong hole, and the second connecting shaft is arranged in the second connecting hole in a penetrating mode, so that the second lock hook is rotatably connected with the unlocking plate.

Furthermore, the left side of the front end of the unlocking plate is provided with a first limiting lug, the first limiting lug protrudes towards the left side, the right side of the front end of the unlocking plate is provided with a second limiting lug, and the second limiting lug protrudes towards the right side.

Further, the elastic element is a torsion spring, and can also be a spring.

Furthermore, a plurality of wavy grooves are formed in the unlocking action part of the unlocking plate.

Furthermore, the lower surface of the unlocking plate is provided with a reinforcing grid.

The relevant content in the above technical solution is explained as follows:

1. in the above scheme, the footboard ladder hasp is equipped with split type first latch hook and second latch hook, and the hasp of single latch hook can make the locking state of footboard more reliable and more stable this structure compares, improves the factor of safety of footboard ladder.

2. In the above scheme, the front end part of the unlocking plate is an unlocking action part, the rear end part of the unlocking plate is provided with the first pin shaft in a penetrating manner along the left-right direction, and the first pin shaft is rotationally positioned in the pedal, so that the unlocking plate is rotationally connected with the pedal;

the elastic element acts on the pedal on one hand and acts below the unlocking plate on the other hand;

when the pedal ladder is unlocked by an operator, the hand of the operator acts on the unlocking action part, overcomes the force of the torsion spring to enable the front end of the unlocking plate to rotate upwards, and unlocks the pedal; when the pedal ladder is locked, the elastic element gives the unlocking plate a torque rotating downwards towards the cross beam, and the torque direction is opposite to the force application direction of an operator, so that the elastic element enables the unlocking plate to keep a state of locking the cross beam; when an operator releases the hand, the unlocking plate automatically returns, and the first locking hook and the second locking hook can be driven to enable the two locking hooks to automatically hook the cross beam to complete locking.

3. In the above scheme, the first lock hook is rotatably connected to the left side of the unlocking plate on one hand, is rotatably connected with the pedal on the other hand, and is rotatably connected with the pedal through a second pin shaft;

the second lock hook is rotatably connected to the right side of the unlocking plate on one hand, is rotatably connected with the pedal on the other hand, and is rotatably connected with the pedal through a third pin shaft;

on the pedal, a rotating shaft at the part where the first locking hook and the second locking hook are rotatably connected with the pedal is parallel to the first pin shaft and is positioned in front of the first pin shaft, namely the second pin shaft is positioned in front of the first pin shaft and is parallel to the first pin shaft, and the third pin shaft is positioned in front of the first pin shaft and is parallel to the first pin shaft;

the first locking hook and the second locking hook are rotatably connected to the front side of the unlocking plate, and the first locking hook and the second locking hook are respectively positioned on the left side and the right side of the unlocking plate;

the structure with the parallel three shafts ensures that the front end part of the unlocking plate is forced to rotate upwards when unlocking is carried out, and the front end part can rotate the hook-shaped parts of the first locking hook and the second locking hook by taking the second pin shaft and the third pin shaft as fulcrums;

the upper end parts of the first lock hook and the second lock hook are rotationally connected with the pedal, so that the rotating directions of the hook-shaped parts of the first lock hook and the second lock hook in the up-down direction are the same as the rotating direction of the front end of the unlocking plate, namely, the front end of the unlocking plate moves upwards to drive the hook-shaped parts of the first lock hook and the second lock hook to move upwards, and the unlocking purpose is achieved; the front end of the unlocking plate moves downwards to drive the hook-shaped parts of the first locking hook and the second locking hook to move downwards; the structure is a labor-consuming lever, the force application stroke is short, the space provided for the unlocking plate to unlock on the pedal is reduced, the use space is saved, and the pedal ladder structure is more exquisite;

when the lock catch is unlocked, an operator only needs to put the palm on the pedal and rotate the unlocking plate upwards with fingers to complete unlocking; because the unlocking stroke is short, the operation of rotating unlocking is similar to the upward lifting of the unlocking plate, the operation process is the same as the habit of applying force of a palm of a person in a contraction state, in addition, the unlocking operation often occurs in the process of accommodating the pedal ladder, the pedal needs to be lifted upwards at the same time, the force application direction of unlocking the lock catch is the same as the force application direction of lifting the pedal, the pedal is unlocked and accommodated in one step, the operation habit of the person is met, and therefore the use experience is better.

4. In the above scheme, the unlocking plate and the first locking hook are connected in a matching manner through a first connecting shaft and a first connecting hole to form a rotating connection;

the unlocking plate and the second lock hook are connected in a matched mode through a second connecting shaft and a second connecting hole to form rotary connection;

the first connecting hole and the second connecting hole are both oblong holes;

therefore, in an unlocking state, the front end part of the unlocking plate can pass through the shaft hole matching structure, on one hand, the first lock hook is driven to rotate forwards by taking the second pin shaft as a rotating shaft, and the hook-shaped part of the first lock hook is enabled to rotate forwards;

the structure of the long round hole is designed because the circle center positions of the unlocking plate and the first locking hook and the second locking hook are different when the unlocking plate and the first locking hook and the second locking hook rotate, and the movement arcs of the locking hook and the unlocking plate are different, so that the position of the connecting part is changed, and the long round hole structure can be well adapted to the change.

5. In the above scheme, first spacing lug is protruding to the left side, the spacing lug of second is protruding to the right side to this limit structure on can cooperating the footboard, it is spacing to the rotation stroke of this unlocking plate front end, upwards rotate the unlocking plate when the operator, drive first latch hook and second latch hook and rotate, thereby when reaching the angle that can dodge the crossbeam unblock, first spacing lug and the spacing lug of second just can be spacing, the operator can learn to have unlocked, need not to bow to observe whether unblock, the operation is felt well and can obtain better operation feedback.

6. In the scheme, the unlocking action part of the unlocking plate is provided with the plurality of wavy grooves, and the wavy grooves can be attached to fingers of an operator, so that the operation hand feeling is comfortable.

7. In the above scheme, the below of unlocking plate is equipped with strengthens the net, and the unlocking plate is a part on footboard surface under the user state, strengthens the structure of net and has promoted the intensity of footboard, can bear great pressure under the user state.

The working principle of the utility model is as follows:

the front end part of the pedal is provided with an installation space of the lock catch, in an installation state, two ends of a first pin shaft are inserted into the space of the front end of the pedal for installing the unlocking plate and penetrate through the unlocking plate, so that the unlocking plate and the pedal are arranged in the same plane, one end of a second pin shaft is inserted into the pedal, the other end of the second pin shaft is inserted into a first lock hook, and the second pin shaft is parallelly positioned on the front side of the first pin shaft, so that the first lock hook is positioned on the left side of the front end part of the unlocking plate; one end of a third pin shaft is inserted in the pedal, the other end of the third pin shaft is inserted in the second lock catch, the third pin shaft is positioned in parallel on the front side of the first pin shaft, and the second lock hook is positioned on the right side of the front end part of the unlocking plate; the elastic element acts on the pedal on one hand and acts on the lower end face of the unlocking plate on the other hand;

when the pedal is locked, the main ladder frame and the auxiliary ladder frame are unfolded, the pedal is opened and rotates towards the cross beam, the palm of an operator presses on the pedal, fingers lift the front end of the unlocking plate, the front end of the unlocking plate rotates upwards by taking the first pin shaft as a rotating shaft, the front end of the unlocking plate drives the first locking hook and the second locking hook respectively through the first connecting part and the second connecting part, on one hand, the first locking hook takes the second pin shaft as the rotating shaft, the hook-shaped part of the first locking hook is lifted upwards, on the other hand, the second locking hook takes the third pin shaft as the rotating shaft, the hook-shaped part of the second locking hook is lifted upwards, and therefore when the pedal moves downwards, the hook-shaped parts of the first locking hook and the second locking hook can avoid the cross beam, and the lower surface of the pedal is lapped on the cross beam;

when the pedal is lapped on the cross beam, the unlocking plate is loosened, the unlocking plate is subjected to downward acting force of the elastic element, the first pin shaft is used as a rotating shaft, the front end part of the unlocking plate rotates downwards, the front end part drives the first locking hook and the second locking hook through the first connecting part and the second connecting part respectively, on one hand, the first locking hook uses the second pin shaft as the rotating shaft, the hook part of the first locking hook moves downwards and hooks the cross beam, on the other hand, the second locking hook uses the third pin shaft as the rotating shaft, and the hook part of the second locking hook moves downwards and hooks the cross beam, so that the locking of the pedal is completed;

when the pedal is unlocked, an operator presses the palm on the pedal, fingers lift the front end of the unlocking plate, the front end of the unlocking plate overcomes the acting force of the elastic element, the first pin shaft serves as a rotating shaft to rotate upwards, when the first limiting lug and the second limiting lug move upwards until the limiting structure in the pedal limits the position, namely the hook-shaped parts of the first locking hook and the second locking hook rotate to the position capable of avoiding the cross beam, the pedal is lifted in a same trend when the pedal is unlocked, and the unlocking is completed in one step.

The utility model has the advantages as follows:

firstly, the structure is simple;

secondly, the pedal can be unlocked and stored simultaneously through one lifting action, so that the pedal is in place in one step and is easy to operate;

and thirdly, the unlocking operation accords with the operation habit of people.

Drawings

FIG. 1 is a perspective view of the pedal ladder lock mounted in the pedal as viewed from above in the first embodiment;

FIG. 2 is an enlarged view of a portion A of FIG. 1 in accordance with a first embodiment;

FIG. 3 is an exploded perspective view of a step ladder lock according to the first embodiment;

fig. 4 is a perspective view of the step ladder, with the step ladder lock in a locked state, viewed from above in the first embodiment;

FIG. 5 is a perspective view of the pedal viewed from above with the pedal ladder lock locked in the locked position according to the first embodiment;

FIG. 6 is a perspective view of the step viewed from above with the step ladder lock in an unlocked state according to the first embodiment;

FIG. 7 is a perspective view of the pedal ladder lock catch in the pedal as viewed from above in the second embodiment;

FIG. 8 is an exploded perspective view of FIG. 7 in accordance with a second embodiment;

FIG. 9 is a partially enlarged view of portion B of FIG. 8 according to the second embodiment;

in the above drawings: 1. an unlocking plate; 2. a first pin shaft; 3. a second pin shaft; 4. a third pin shaft; 5. an elastic element; 6. a first latch hook; 7. a second latch hook; 8. a cross beam; 9. a first limit bump; 10. a second limit bump; 11. a first connecting shaft; 12. a second connecting shaft; 13. a first connection hole; 14. a second connection hole; 15. a wavy groove; 16. reinforcing the grid; 17. a main ladder frame; 18. a secondary ladder frame; 19. a pedal; 20. spring positioning post.

Detailed Description

The invention will be further described with reference to the following drawings and examples:

the present disclosure will be described more fully hereinafter with reference to the accompanying drawings, in which embodiments of the disclosure may be shown and described, and which, when modified and varied by the techniques taught herein, can be made by those skilled in the art without departing from the spirit and scope of the disclosure.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms "a", "an", "the" and "the", as used herein, also include the plural forms.

The terms "first," "second," and the like, as used herein, do not denote any order or importance, nor do they denote any order or importance, but rather are used to distinguish one element from another element or operation described in such technical terms.

As used herein, "connected" or "positioned" refers to two or more elements or devices being in direct physical contact with each other or in indirect physical contact with each other, and may also refer to two or more elements or devices being in operation or acting on each other.

As used herein, the terms "comprising," "including," "having," and the like are open-ended terms that mean including, but not limited to.

As used herein, the term (terms), unless otherwise indicated, shall generally have the ordinary meaning as commonly understood by one of ordinary skill in the art, in this written description and in the claims. Certain words used to describe the disclosure are discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the disclosure.

The terms "front", "rear", "upper", "lower", "left" and "right" used herein are directional terms, and are used only for describing the positional relationship between the structures, and are not intended to limit the specific direction of the protective reaction and the practical implementation of the present invention.

The first embodiment is as follows:

referring to fig. 1 to 6, a pedal ladder lock convenient to unlock includes an unlocking plate 1, a first pin 2, a second pin 3, a third pin 4, an elastic element 5, a first lock hook 6 and a second lock hook 7, as shown in fig. 3.

As shown in fig. 4, the lock catch is arranged at the front end of a pedal 19 of the step ladder, an auxiliary ladder frame 18 of the step ladder can rotate relative to a main ladder frame 17, the pedal 19 is rotatably arranged on the main ladder frame 17 of the step ladder, the front end of the pedal 19 is arranged corresponding to the auxiliary ladder frame 18 of the step ladder, and the lock catch unlocks and locks a cross beam 8 on the auxiliary ladder frame 18; the extending direction of the beam 8 is defined as the left-right direction.

As shown in fig. 1, fig. 2 and fig. 3, the front end of the unlocking plate 1 is an unlocking action part, the rear end of the unlocking plate 1 is provided with the first pin shaft 2 along the left-right direction, and the first pin shaft 2 is rotatably positioned in the pedal 19, so that the unlocking plate 1 is rotatably connected with the pedal 19;

the elastic element 5 is a torsion spring, which is sleeved on the first pin 2, and acts on the pedal 19 on one hand and acts below the unlocking plate 1 on the other hand, so that the torsion spring can apply a torque to the unlocking plate 1 opposite to the rotation direction during unlocking.

As shown in fig. 2 and fig. 3, a first connecting shaft 11 extending to the left side is disposed on the left side of the front end of the unlocking plate 1, correspondingly, a forward protrusion is disposed on the right side of the first locking hook 6, a first connecting hole 13 matched with the first connecting shaft 11 is disposed in the protrusion, the first connecting hole 13 is an oblong hole and is located below the first locking hook 6 relative to the second pin 3, so as to form a rotational connection between the first locking hook 6 and the unlocking plate 1;

meanwhile, the second pin shaft 3 penetrates through the first lock hook 6 along the left-right direction, and the second pin shaft 3 is rotatably positioned in the pedal 19, so that the first lock hook 6 is rotatably connected with the pedal 19; the second pin shaft 3 is positioned in front of the first pin shaft 2 and is parallel to the first pin shaft 2;

a second connecting shaft 12 extending to the right side is arranged on the right side of the front end of the unlocking plate 1; correspondingly, a forward bulge is arranged on the left side of the second lock hook 7, a second connecting hole 14 matched with the second connecting shaft 12 is formed in the bulge, the second connecting hole 14 is an oblong hole and is positioned below the second lock hook 7 relative to the third pin shaft 4, and therefore the rotary connection between the second lock hook 7 and the unlocking plate 1 is formed;

meanwhile, the third pin shaft 4 penetrates through the second lock hook 7 along the left-right direction, and the third pin shaft 4 is rotationally positioned in the pedal 19, so that the second lock hook 7 is rotationally connected with the pedal 19; the third pin shaft 4 is positioned in front of the first pin shaft 2 and is parallel to the first pin shaft 2;

the structure of the long circular hole is designed because the circle center positions of the unlocking plate 1, the first locking hook 6 and the second locking hook 7 are different during rotation, and the movement circular arcs are different, so that the position of the rotary connecting part is changed, and the long circular hole structure can be well adapted to the change.

Preferably, the hook of the first locking hook 6 is located at the front side of the second pin 3, and the opening of the hook is arranged towards the back; because the unlocking plate is lifted upwards to drive the first locking hook 6 to rotate upwards during unlocking, the hook-shaped part of the first locking hook 6 is enabled to move forwards during unlocking by the structure, and the first locking hook can better avoid the cross beam 8.

Preferably, the hook of the second latch hook 7 is located at the front side of the third pin 4, and the opening of the hook is arranged towards the rear; because the unlocking plate is lifted upwards to drive the second locking hook 7 to rotate upwards during unlocking, the hook-shaped part of the second locking hook 7 is enabled to move forwards during unlocking by the structure of the second locking hook 7, and the beam 8 can be better avoided.

Preferably, a first limiting bump 9 is arranged on the left side of the front end of the unlocking plate 1, the first limiting bump 9 protrudes towards the left side, and the first connecting shaft 11 is arranged on the first limiting bump 9; a second limiting lug 10 is arranged on the right side of the front end of the unlocking plate 1, the second limiting lug 10 protrudes towards the right side, and the second connecting shaft 12 is arranged on the two limiting lugs 10;

correspondingly, the pedal 19 is provided with two limiting protrusions corresponding to the first limiting protrusion 9 and the second limiting protrusion 10, so as to limit the rotation stroke of the front end of the unlocking plate 1.

Preferably, as shown in fig. 3, a plurality of wavy grooves 15 are formed on the unlocking acting part of the unlocking plate 1; a reinforcing grid 16 is arranged below the unlocking plate 1.

As shown in fig. 4, 5 and 6, when the pedal 19 is locked, the main ladder frame 17 and the auxiliary ladder frame 18 are unfolded, the pedal 19 is opened and rotated toward the cross beam 8, the palm of the operator presses on the pedal 19, the front end of the unlocking plate 1 is lifted by the fingers, the front end of the unlocking plate 1 is rotated upward by using the first pin shaft 2 as a rotating shaft, the front end of the unlocking plate 1 drives the first locking hook 6 and the second locking hook 7, on one hand, the first locking hook 6 is lifted upward by using the second pin shaft 3 as the rotating shaft, and on the other hand, the second locking hook 7 is lifted upward by using the third pin shaft 4 as the rotating shaft, so that when the pedal 19 moves downward, the hook parts of the first locking hook 6 and the second locking hook 7 can be avoided from the cross beam 8, and the lower surface of the pedal 19 is lapped on the cross beam 8;

when the pedal 19 is lapped on the cross beam 8, the unlocking plate 1 is loosened, the unlocking plate 1 is subjected to the elasticity of the elastic element 5, the first pin shaft 2 is taken as a rotating shaft, the front end part of the first pin shaft 2 rotates downwards, and the front end part drives the first locking hook 6 and the second locking hook 7, so that the first locking hook 6 takes the second pin shaft 3 as the rotating shaft, the hook part of the first locking hook moves downwards and hooks the cross beam 8, and the second locking hook 7 takes the third pin shaft 4 as the rotating shaft, the hook part of the second locking hook moves downwards and hooks the cross beam 8, and the locking of the pedal 19 is completed;

when the pedal 19 is unlocked, the palm of an operator presses on the pedal 19, fingers lift the front end of the unlocking plate 1, the front end part of the unlocking plate 1 overcomes the torsion of the elastic element 5, the first pin shaft 2 serves as a rotating shaft to rotate upwards, and when the first limiting lug 9 and the second limiting lug 10 move upwards until being limited by a limiting structure in the pedal 19, namely the hook-shaped parts of the first locking hook 6 and the second locking hook 7 rotate to positions capable of avoiding the cross beam 8, so that the pedal 19 is lifted, and unlocking is completed.

Other embodiments and structural changes of the present invention are described below as follows:

1. in the above embodiment, the first latch hook 6 and the second latch hook 7 are connected to the pedal 19 by a pin, the first latch hook 6 and the second latch hook 7 may share a rotating shaft, or the first latch hook 6 and the second latch hook 7 are provided with short shafts, and the pedal 19 is correspondingly provided with holes, so that the first latch hook 6 and the second latch hook 7 are rotatably connected to the pedal 19 by shaft hole matching, as long as the structure that the first latch hook 6 and the second latch hook 7 are rotatably connected to the pedal 19 should be included in the present invention, which can be understood and accepted by those skilled in the art.

2. In the above embodiments, the first connecting portion and the second connecting portion are shaft hole matching structures formed by the shaft on the unlocking plate 1 and the long circular holes on the first locking hook 6 and the second locking hook 7, and may also be shaft hole matching structures formed by the shaft on the first locking hook 6 and the second locking hook 7 and long circular holes on both sides of the unlocking plate 1, as long as the structures are formed by the unlocking plate 1 and the first locking hook 6 and the second locking hook 7 are rotatably connected, which can be understood and accepted by those skilled in the art.

Example two:

referring to fig. 7 to 9, one of the differences between the second embodiment and the first embodiment is that: the elastic element 5 is a spring, the pedal 19 corresponds to the first limit bump 9 and the second limit bump 10, two limit grooves are arranged at the front end of the lower surface of the pedal 19, spring positioning columns 20 extending along the vertical direction are arranged in the limit grooves, the spring is positioned in the spring positioning columns 20, on one hand, the spring applies elastic force to the lower surface of the pedal 19, on the other hand, the spring applies elastic force to the first limit bump 9 and the second limit bump 10, namely, the spring applies elastic force to the unlocking plate 1, and therefore the spring can apply torque opposite to the rotating direction during unlocking to the unlocking plate 1.

The second embodiment is different from the first embodiment in that: two bulges are arranged on the front side of the first lock hook 6, first connecting holes 13 penetrate through the two bulges, a first connecting shaft 11 extending to the left side is arranged on the left side of the front end of the unlocking plate 1, and the first connecting shaft 11 is matched with the first connecting holes 13 to enable the first lock hook 6 to be rotatably connected to the left side of the unlocking plate 1; the front side of the second lock hook 7 is provided with two bulges, second connecting holes 14 are respectively penetrated through the two bulges, a second connecting shaft 12 extending towards the right side is arranged on the right side of the front end of the unlocking plate 1, and the second connecting shaft 12 is matched with the second connecting holes 14 to enable the second lock hook 7 to be rotatably connected to the right side of the unlocking plate 1.

The rest of the process is the same as the first embodiment and is not described herein again.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims (8)

1. A pedal ladder lock catch convenient for unlocking is arranged at the front end of a pedal (19) of a pedal ladder; the pedals (19) are rotatably arranged on a main ladder frame (17) of the pedal ladder, and the front ends of the pedals (19) are arranged corresponding to an auxiliary ladder frame (18) of the pedal ladder; the lock catch unlocks and locks a cross beam (8) on the auxiliary ladder frame (18), and the cross beam (8) is horizontally arranged; the method is characterized in that:

the lock catch comprises an unlocking plate (1), a first lock hook (6) and a second lock hook (7);

the front end part of the unlocking plate (1) is an unlocking action part, a first pin shaft (2) penetrates through the rear end part of the unlocking plate (1) along the horizontal direction, and meanwhile, the first pin shaft (2) is rotationally positioned in the pedal (19) so as to form the rotational connection of the unlocking plate (1) and the pedal (19);

the lock catch further comprises an elastic element (5), wherein the elastic element (5) acts between the pedal (19) and the unlocking plate (1);

the first locking hook (6) is provided with a hook-shaped part, and the first locking hook (6) is rotationally positioned on the pedal (19) on one hand and is rotationally connected to the left side of the unlocking plate (1) on the other hand;

the second locking hook (7) is provided with a hook-shaped part, and the second locking hook (7) is rotationally positioned on the pedal (19) on one hand and is rotationally connected to the right side of the unlocking plate (1) on the other hand;

on the pedal (19), a rotating shaft of a rotating connection part of the first lock hook (6) and the second lock hook (7) and the pedal (19) is parallel to the first pin shaft (2) and is positioned in front of the first pin shaft (2).

2. The easy-to-unlock pedal ladder lock catch of claim 1, wherein: the lower end of the first lock hook (6) is a hook-shaped part, the left side of the upper end of the first lock hook (6) is rotatably positioned on the pedal (19), the right side of the first lock hook (6) is rotatably connected to the left side of the unlocking plate (1), and the rotary connection part is positioned between the upper end and the lower end of the first lock hook (6);

the lower end of the second lock hook (7) is a hook-shaped part, the right side of the upper end of the second lock hook (7) is rotatably positioned on the pedal (19), the left side of the second lock hook (7) is rotatably connected to the right side of the unlocking plate (1), and the rotary connecting part is positioned between the upper end and the lower end of the second lock hook (7).

3. The easy-to-unlock pedal ladder lock catch of claim 2, wherein: the lock catch further comprises a second pin shaft (3) and a third pin shaft (4);

the second pin shaft (3) penetrates through the upper end of the first lock hook (6) along the left-right direction, and meanwhile, the second pin shaft (3) is rotatably positioned in the pedal (19) to form the rotary connection of the first lock hook (6) and the pedal (19);

the third pin shaft (4) penetrates through the upper end of the second lock hook (7) along the left-right direction, and meanwhile, the third pin shaft (4) is rotatably positioned in the pedal (19) to form the rotary connection between the second lock hook (7) and the pedal (19);

the second pin shaft (3) and the third pin shaft (4) are both parallel to the first pin shaft (2) and are positioned in front of the first pin shaft (2).

4. The easy-to-unlock pedal ladder lock catch of claim 3, wherein: a first connecting shaft (11) extending to the left side is arranged on the left side of the unlocking plate (1), and a second connecting shaft (12) extending to the right side is arranged on the right side of the unlocking plate (1);

a convex block is arranged on the front side of the first lock hook (6), the convex block is positioned between the second pin shaft (3) and the hook-shaped part of the first lock hook (6), a first connecting hole (13) matched with the first connecting shaft (11) is formed in the convex block, the first connecting hole (13) is a long round hole, and the first connecting shaft (11) penetrates through the first connecting hole (13), so that the first lock hook (6) is rotationally connected with the unlocking plate (1);

the front side of the second lock hook (7) is provided with a convex block, the convex block is positioned between the third pin shaft (4) and the hook-shaped part of the second lock hook (7), a second connecting hole (14) matched with the second connecting shaft (12) is formed in the convex block, the second connecting hole (14) is a long round hole, and the second connecting shaft (12) penetrates through the second connecting hole (14), so that the second lock hook (7) is rotatably connected with the unlocking plate (1).

5. The easy-to-unlock pedal ladder lock catch of claim 1, wherein: the left side of unlocking plate (1) front end is equipped with first spacing lug (9), first spacing lug (9) are protruding to the left side, and the right side of unlocking plate (1) front end is equipped with spacing lug of second (10), spacing lug of second (10) are protruding to the right side.

6. The easy-to-unlock pedal ladder lock catch of claim 1, wherein: the elastic element (5) is a torsion spring or a spring.

7. The easy-to-unlock pedal ladder lock catch of claim 1, wherein: the unlocking action part of the unlocking plate (1) is provided with a plurality of wavy grooves (15).

8. The easy-to-unlock pedal ladder lock catch of claim 1, wherein: the lower surface of the unlocking plate (1) is provided with a reinforcing grid (16).

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