CN215718410U - Single-handrail wide-stepping three-step ladder - Google Patents

Single-handrail wide-stepping three-step ladder Download PDF

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Publication number
CN215718410U
CN215718410U CN202122084716.2U CN202122084716U CN215718410U CN 215718410 U CN215718410 U CN 215718410U CN 202122084716 U CN202122084716 U CN 202122084716U CN 215718410 U CN215718410 U CN 215718410U
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China
Prior art keywords
groove
sliding
hole
supporting rod
block
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CN202122084716.2U
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Chinese (zh)
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兰许坡
徐建东
邱俊杰
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Zhejiang Aopeng Industry And Trading Co ltd
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Zhejiang Aopeng Industry And Trading Co ltd
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Abstract

A single-handrail wide-stepping three-step ladder aims to solve the problems that a handrail occupies extra space, is inconvenient to store and transport and comprises a first ladder body, a second ladder body and a rotatable and foldable pedal structure, wherein the first ladder body comprises a first front supporting rod and a first rear supporting rod, the second ladder body comprises a second front supporting rod and a second rear supporting rod, the top end of the first front supporting rod is provided with a slot extending along the direction of the first front supporting rod, a connecting hole leading to the outside of the first front supporting rod is formed in one side slot wall of the slot, a handrail rod is connected in the slot in a sliding mode, the top end of the handrail rod penetrates through the slot opening of the slot, and the handrail rod comprises a top seat, a base and a handrail tube.

Description

Single-handrail wide-stepping three-step ladder
Technical Field
The utility model relates to the technical field of ladders, in particular to a single-handrail wide-stepping three-step ladder.
Background
The ladder is used as an auxiliary climbing tool and mainly used for people to climb. However, the existing ladder generally comprises a ladder frame and a ladder board arranged on the ladder frame, and no other safety protection structures exist, so that the high-altitude falling accident is easily caused if the gravity center is unstable in the using process of people.
In order to prevent the falling accident from high altitude, the handrails are usually arranged on the ladder, but the handrails occupy extra space, are inconvenient to store and transport and are inconvenient to package and transport when the handrails are arranged on the ladder.
Therefore, the utility model provides a technical scheme to solve the problems that the handrail occupies extra space, is inconvenient to store and transport and is inconvenient to package and transport.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model aims to provide a single-handrail wide-stepping three-step ladder, and aims to achieve the technical effect of telescopic handrails.
A single-handrail wide-stepping three-step ladder comprises a first ladder body, a second ladder body and a rotatable and foldable pedal structure, wherein the first ladder body and the second ladder body are symmetrically arranged, the pedal structure is positioned between the first ladder body and the second ladder body, the first ladder body comprises a first front supporting rod and a first rear supporting rod, the top ends of the first front supporting rod and the first rear supporting rod are rotatably connected, the second ladder body comprises a second front supporting rod and a second rear supporting rod, the top ends of the second front supporting rod and the second rear supporting rod are rotatably connected, a slot extending along the direction of the first front supporting rod is formed in the top end of the first front supporting rod, a connecting hole leading to the outside of the first front supporting rod is formed in the slot wall on one side of the slot, a handrail rod is slidably connected in the slot, and the top end of the handrail rod penetrates through the slot opening of the slot, the handrail rod comprises a top seat, a base and a handrail tube;
the top end of the handrail tube is positioned outside the slot, a first through hole is formed in one side of the handrail tube, the bottom end of the handrail tube is positioned in the slot, and a second through hole corresponding to the connecting hole is formed in one side of the handrail tube;
the top seat is inserted at the top end of the handrail tube and is fixedly connected with the handrail tube through a bolt, one side of the top seat is transversely provided with a sliding cavity corresponding to the position of the first through hole, a through groove is communicated between the sliding cavity and the first through hole, a first sliding groove is communicated between the sliding cavity and the inside of the handrail tube, a sliding block is connected in the sliding cavity in a sliding way, one end of the sliding block, which is close to the through groove, is fixed with a button, one end of the button, which is far away from the sliding block, sequentially passes through the through groove and the first through hole, a first spring is fixedly connected between one end of the sliding block, which is far away from the through groove, and the cavity wall of the sliding cavity, one end of the sliding block, which is close to the first sliding groove, a first push block is connected in the first sliding groove in a sliding way, the top end of the first push block penetrates out of the first sliding groove and is provided with a second inclined surface which is matched and connected with the first inclined surface, and the bottom end of the first push block is fixed with a connecting rod, the bottom end of the connecting rod penetrates into the handrail tube and is fixed with a second push block;
the utility model discloses a handle pipe, including base, connecting block, second push block, connecting pin, connecting groove, bolt and handrail pipe fixed connection, the bottom of locating the handrail pipe is inserted to the base and is passed through bolt and handrail pipe fixed connection, the spread groove that corresponds with second through-hole position is seted up to one side of base, the top of base seted up with the communicating second spout of spread groove, the bottom of second push block penetrates in the spread groove through the second spout, and is provided with the third inclined plane, sliding connection has the connecting block in the spread groove, one side that is close to the second through-hole on the connecting block is fixed with the connecting pin, the spread groove is worn out to the other end of connecting pin to pass in the second through-hole inserts the connecting hole, fixedly connected with second spring between the cell wall of one side that deviates from the second through-hole on the connecting block and the spread groove, the fourth inclined plane of being connected with the cooperation of third inclined plane is seted up on the top of connecting block.
By adopting the technical scheme, when the grab rail needs to be contracted, the button is pressed and slides towards the sliding cavity along the first through hole and the through groove, so that the sliding block is driven to slide in the sliding cavity back to the through groove, the sliding block presses the first spring, the first spring is compressed to form resilience force towards the through groove, when the sliding block slides back to the through groove, the first inclined plane on the sliding block is attached to the second inclined plane of the first push block, the first inclined plane faces the second inclined plane to form acting force towards the sliding cavity, the acting force can be decomposed into acting force towards the first sliding groove on the second inclined plane, the first push block moves towards the first sliding groove, so that the connecting rod is driven to move downwards along the grab rail, the connecting rod drives the second push block to move downwards along the second sliding groove, the bottom end of the second push block penetrates into the connecting groove, the third inclined plane on the connecting block is attached to the fourth inclined plane of the connecting block, the third inclined surface forms a downward acting force to the fourth inclined surface, the acting force can be decomposed into an acting force towards the inside of the connecting groove on the fourth inclined surface, the connecting block continuously goes deep into the connecting groove under the action of the acting force, the connecting pin originally inserted into the connecting hole is moved out of the connecting hole and retracts into the connecting groove through the second through hole, and meanwhile, the second spring is compressed to form a rebound force towards the second through hole. After the connecting pin is pulled out of the connecting hole, the grab bar and the first front supporting rod are not fixed any more, and the grab bar can move downwards and is contracted in the slot. After the grab bar moves downwards, the connecting pin is supported by the slot wall of the slot and is always positioned in the connecting slot. When the grab bar needs to be pulled out again, the grab bar is directly pulled up, and when the connecting groove corresponds to the position of the second through hole, the connecting pin penetrates out of the connecting groove under the action of the rebounding force of the second spring and penetrates through the second through hole to be inserted into the connecting hole. Thereby fixing the grab rail. The utility model can contract the grab rail by one key, and the grab rail frame is contracted into the first front supporting rod, so that the grab rail does not occupy space, and is convenient for storage, placement and transportation.
The utility model further comprises the following steps: the top end of the grab rail is provided with an L-shaped handle block, the L-shaped handle block comprises a sleeve part and a handle part, the sleeve part is sleeved at the top end of the grab rail and fixed with the grab rail through a bolt, and the sleeve part is provided with an opening corresponding to the first through hole.
Through adopting above-mentioned technical scheme, the L type is fixed on the top of grab rail through the sleeve pipe part cover setting to the piece, and the sleeve pipe part card is outside the notch of slot, guarantees that the top of handrail pipe is located the slot all the time. And the opening does not influence the use of the button.
The utility model further comprises the following steps: the handle part is provided with a plurality of holding grains.
Through adopting above-mentioned technical scheme, the setting of holding the line makes the handle part more comfortable when using.
The utility model further comprises the following steps: the grip part is also sleeved with a rubber sleeve.
Through adopting above-mentioned technical scheme, the setting of rubber sleeve both can prevent static, also can play the effect that increases friction power, simultaneously, has still further strengthened the travelling comfort of handle part.
The utility model further comprises the following steps: the top of base is fixed with spacing, set up on the spacing and supply the connecting rod to insert and gliding spacing groove.
Through adopting above-mentioned technical scheme, the connecting rod is when reciprocating, and a part of its bottom can remove in the spacing groove, has promoted the stability of connecting rod when reciprocating.
The utility model further comprises the following steps: a strip-shaped groove is formed in the groove wall of the second sliding groove, and a limiting block used for being inserted into the strip-shaped groove and sliding in the strip-shaped groove is fixed on the second pushing block.
Through adopting above-mentioned technical scheme, when the second ejector pad slided in the second spout, the stopper slided in the bar groove, and stability when promoting the second ejector pad on the one hand and sliding from top to bottom, on the other hand, unable continuation removal when the stopper contacts with the cell wall in bar groove prevents that the second ejector pad from falling out from the second spout.
Compared with the prior art, the utility model has the beneficial effects that:
a single handrail steps on the three-step ladder widely, when needing to shrink the bar, press the button, the button slides to the sliding cavity along the first through hole and through groove, thus drive the slide block to slide in the sliding cavity back to the through groove, the slide block presses the first spring, the first spring is compressed and formed the resilience towards through groove, when the slide block slides in the through groove back to, the first inclined plane on it is laminated on the second inclined plane of the first ejector pad, the first inclined plane forms the effort towards in the sliding cavity to the second inclined plane, the effort can be decomposed into the effort towards first concrete chute on the second inclined plane, the first ejector pad moves to the first concrete chute, thus drive the connecting rod to move down along the bar pipe, the connecting rod drives the second ejector pad to move down, the second ejector pad moves down along the second concrete chute, the bottom of the second ejector pad penetrates into the connecting groove, the third inclined plane on it is laminated on the fourth inclined plane of the connecting block, the third inclined surface forms a downward acting force to the fourth inclined surface, the acting force can be decomposed into an acting force towards the inside of the connecting groove on the fourth inclined surface, the connecting block continuously goes deep into the connecting groove under the action of the acting force, the connecting pin originally inserted into the connecting hole is moved out of the connecting hole and retracts into the connecting groove through the second through hole, and meanwhile, the second spring is compressed to form a rebound force towards the second through hole. After the connecting pin is pulled out of the connecting hole, the grab bar and the first front supporting rod are not fixed any more, and the grab bar can move downwards and is contracted in the slot. After the grab bar moves downwards, the connecting pin is supported by the slot wall of the slot and is always positioned in the connecting slot. When the grab bar needs to be pulled out again, the grab bar is directly pulled up, and when the connecting groove corresponds to the position of the second through hole, the connecting pin penetrates out of the connecting groove under the action of the rebounding force of the second spring and penetrates through the second through hole to be inserted into the connecting hole. Thereby fixing the grab rail. The utility model can contract the grab rail by one key, and the grab rail frame is contracted into the first front supporting rod, so that the grab rail does not occupy space, and is convenient for storage, placement and transportation.
Drawings
FIG. 1 is a schematic structural view of a single-handrail wide-stepping three-step ladder according to the present invention;
FIG. 2 is a schematic structural view of a first front support bar of a single-armrest wide-stepping three-step ladder according to the present invention;
FIG. 3 is a schematic structural view of a grab bar and an L-shaped handle block of a single-armrest wide-stepping three-step ladder of the present invention;
FIG. 4 is a schematic structural view of a grab bar of a single-handrail wide-stepping three-step ladder according to the present invention;
FIG. 5 is a schematic structural view of an L-shaped handle block of a single-armrest wide-stepping three-step ladder according to the present invention;
FIG. 6 is a schematic structural view of the top seat, the connecting rod and the base of the single-armrest wide-stepping three-step ladder of the present invention;
FIG. 7 is an enlarged view taken at A in FIG. 6;
FIG. 8 is a cross-sectional view of the L-shaped handle block and the footstock of a single-armrest wide-stepped three-step ladder of the present invention;
FIG. 9 is an enlarged view at B in FIG. 8;
fig. 10 is a cross-sectional view of the base of a single handrail wide-step three-step ladder of the present invention.
Reference numerals: 1. a first ladder body; 2. a second ladder body; 3. a pedal structure; 4. a first front support bar; 5. a first rear support bar; 6. a second front support bar; 7. a second rear support bar; 8. a slot; 9. connecting holes; 10. a grab rail; 11. a top seat; 12. a base; 13. a handrail tube; 14. a first through hole; 15. a second through hole; 16. a slide chamber; 17. a through groove; 18. a first chute; 19. a slider; 20. a button; 21. a first spring; 22. a first inclined surface; 23. a first push block; 24. a second inclined surface; 25. a connecting rod; 26. a second push block; 27. connecting grooves; 28. a second chute; 29. a third inclined surface; 30. connecting blocks; 31. a connecting pin; 32. a second spring; 33. a fourth inclined surface; 34. an L-shaped handle block; 35. a sleeve portion; 36. a grip portion; 37. an opening; 38. holding grains; 39. a limiting strip; 40. a limiting groove; 41. a strip-shaped groove; 42. and a limiting block.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A single-armrest wide-stepping three-step ladder is shown in figures 1-10 and comprises a first ladder body 1, a second ladder body 2 and a rotatable and foldable pedal structure 3, wherein the first ladder body 1 and the second ladder body 2 are symmetrically arranged, the pedal structure 3 is positioned between the first ladder body 1 and the second ladder body 2, the first ladder body 1 comprises a first front supporting rod 4 and a first rear supporting rod 5, the top ends of the first front supporting rod 4 and the first rear supporting rod 5 are rotatably connected, the second ladder body 2 comprises a second front supporting rod 6 and a second rear supporting rod 7, and the top ends of the second front supporting rod 6 and the second rear supporting rod 7 are rotatably connected. The foldable pedal structure 3 in the folding ladder technology is a mature prior art, such as a pedal in a folding household ladder in chinese patent No. CN209637668U, a folding mechanism in a ladder handrail structure in chinese patent No. CN208106298U, etc., and will not be described in detail herein.
The top end of the first front supporting rod 4 is provided with a slot 8 extending along the direction of the first front supporting rod, a connecting hole 9 leading to the outside of the first front supporting rod 4 is formed in one side slot wall of the slot 8, a grab bar 10 is connected in the slot 8 in a sliding mode, and the top end of the grab bar 10 penetrates through a notch of the slot 8 and is provided with an L-shaped handle block 34. The L-shaped handle block 34 includes a sleeve portion 35 and a grip portion 36, the sleeve portion 35 is sleeved on the top end of the grab bar 10 and fixed with the grab bar 10 by a bolt, and the sleeve portion 35 is opened with an opening 37. The grip portion 36 is provided with a plurality of grip stripes 38 and is sleeved with a rubber sleeve. The L-shaped handle block 34 is sleeved and fixed at the top end of the grab rail 10 through the sleeve part 35, and the sleeve part 35 is clamped at the notch of the slot 8, so that the top end of the grab rail 13 is always positioned outside the slot 8. The provision of the grip striations 38 makes the grip portion 36 more comfortable in use. The rubber sleeve not only prevents static electricity, but also increases friction, and further enhances the comfort of the grip portion 36.
The grab bar 10 includes a top seat 11, a base 12, and a grab pipe 13.
The top end of the handrail tube 13 is positioned outside the slot 8, a first through hole 14 corresponding to the position of the opening 37 is arranged on one side of the handrail tube 13, the bottom end of the handrail tube 13 is positioned in the slot 8, and a second through hole 15 corresponding to the position of the connecting hole 9 is arranged on one side of the handrail tube 13.
The footstock 11 is inserted at the top end of the handrail tube 13 and is fixedly connected with the handrail tube 13 through a bolt, one side of the footstock 11 is transversely provided with a sliding cavity 16 corresponding to the position of the first through hole 14, a through groove 17 is communicated between the sliding cavity 16 and the first through hole 14, a first sliding groove 18 is communicated between the sliding cavity 16 and the inside of the handrail tube 13, the sliding cavity 16 is connected with a sliding block 19 in a sliding way, one end of the sliding block 19 close to the through groove 17 is fixed with a button 20, one end of the button 20 departing from the sliding block 19 sequentially passes through the through groove 17 and the first through hole 14, a first spring 21 is fixedly connected between one end of the sliding block 19 departing from the through groove 17 and the cavity wall of the sliding cavity 16, one end of the sliding block 19 close to the first sliding groove 18 is provided with a first inclined surface 22, a first push block 23 is connected in the first sliding groove 18 in a sliding way, the top end of the first push block 23 penetrates through the first sliding groove 18, and is provided with a second inclined surface 24 connected with the first inclined surface 22 in a matching way, the bottom end of the first push block 23 is fixed with a connecting rod 25, and the bottom end of the connecting rod 25 penetrates into the handrail tube 13 and is fixed with a second push block 26.
The base 12 is inserted in the bottom end of the handrail tube 13 and is fixedly connected with the handrail tube 13 through a bolt, a connecting groove 27 corresponding to the position of the second through hole 15 is formed in one side of the base 12, a second sliding groove 28 communicated with the connecting groove 27 is formed in the top end of the base 12, the bottom end of the second push block 26 penetrates into the connecting groove 27 through the second sliding groove 28, a third inclined surface 29 is arranged, a connecting block 30 is connected in the connecting groove 27 in a sliding mode, a connecting pin 31 is fixed to one side, close to the second through hole 15, of the connecting block 30, the other end of the connecting pin 31 penetrates out of the connecting groove 27 and penetrates through the second through hole 15 to be inserted into the connecting hole 9, a second spring 32 is fixedly connected between one side, deviating from the second through hole 15, of the connecting block 30 and the groove wall of the connecting groove 27, and a fourth inclined surface 33 connected with the third inclined surface 29 in a matched mode is formed in the top end of the connecting block 30.
Additionally, a limiting bar 39 is fixed at the top end of the base 12, and a limiting groove 40 for the connecting rod 25 to insert and slide is formed on the limiting bar 39. When connecting rod 25 reciprocates, a part of its bottom can remove in spacing groove 40, has promoted the stability when connecting rod 25 reciprocates.
A strip-shaped groove 41 is formed in the groove wall of the second sliding groove 28, and a limiting block 42 which is used for being inserted into the strip-shaped groove 41 and sliding in the strip-shaped groove 41 is fixed on the second pushing block 26. When the second push block 26 slides in the second sliding groove 28, the limit block 42 slides in the strip-shaped groove 41, so that on one hand, the stability of the second push block 26 during sliding up and down is improved, and on the other hand, the limit block 42 cannot move continuously when contacting with the groove wall of the strip-shaped groove 41, and the second push block 26 is prevented from falling out of the second sliding groove 28.
The working principle is as follows: when the grab bar 10 needs to be retracted, the button 20 is pressed, the button 20 slides towards the sliding cavity 16 along the opening 37, the first through hole 14 and the through groove 17, so as to drive the sliding block 19 to slide in the sliding cavity 16 back to the through groove 17, the sliding block 19 presses the first spring 21, the first spring 21 is compressed to form a counterforce force towards the through groove 17, when the sliding block 19 slides back to the through groove 17, the first inclined surface 22 on the sliding block is attached to the second inclined surface 24 of the first push block 23, the first inclined surface 22 forms an acting force towards the sliding cavity 16 on the second inclined surface 24, the acting force can be decomposed into an acting force towards the first sliding groove 18 on the second inclined surface 24, the first push block 23 moves towards the first sliding groove 18, so as to drive the connecting rod 25 to move downwards along the grab bar 13, the connecting rod 25 drives the second push block 26 to move downwards, the second push block 26 moves downwards along the second sliding groove 28, and the bottom end of the second push block 26 penetrates into the connecting groove 27, the third inclined surface 29 is attached to the fourth inclined surface 33 of the connecting block 30, the third inclined surface 29 applies a downward force to the fourth inclined surface 33, the downward force can be decomposed into a force toward the inside of the connecting groove 27 on the fourth inclined surface 33, the connecting block 30 is continuously inserted into the connecting groove 27 under the downward force, the connecting pin 31 originally inserted into the connecting hole 9 is removed from the connecting hole 9 and is retracted into the connecting groove 27 through the second through hole 15, and at the same time, the second spring 32 is compressed to form a repulsive force toward the second through hole 15. After the connecting pin 31 is pulled out from the connecting hole 9, the grab bar 10 is not fixed to the first front support bar 4, and the grab bar 10 can move downward and be retracted into the slot 8. After the grab bar 10 moves downward, the connecting pin 31 is pressed against the wall of the slot 8 and is always located in the connecting slot 27. When it is necessary to withdraw the rest bar 10 again, the rest bar 10 is directly pulled up, and when the coupling groove 27 corresponds to the position of the second through hole 15, the coupling pin 31 is inserted into the coupling hole 9 through the second through hole 15 through the coupling groove 27 by the repulsive force of the second spring 32. Thereby fixing the grab rail 10.
The utility model can contract the grab rail 10 by one key, and the grab rail frame is contracted into the first front supporting rod 4, so that the grab rail 10 does not occupy space, and is convenient for storage, placement and transportation.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "" second "are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are to be construed broadly, e.g., "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims (6)

1. A single-armrest wide-stepping three-step ladder comprises a first ladder body (1), a second ladder body (2) and a rotatable and foldable pedal structure (3), wherein the first ladder body (1) and the second ladder body (2) are symmetrically arranged, the pedal structure (3) is located between the first ladder body (1) and the second ladder body (2), the first ladder body (1) comprises a first front supporting rod (4) and a first rear supporting rod (5), the top ends of the first front supporting rod (4) and the first rear supporting rod (5) are rotatably connected, the second ladder body (2) comprises a second front supporting rod (6) and a second rear supporting rod (7), and the top ends of the second front supporting rod (6) and the second rear supporting rod (7) are rotatably connected, and the ladder is characterized in that: the top end of the first front supporting rod (4) is provided with a slot (8) extending along the direction of the first front supporting rod, a connecting hole (9) leading to the outside of the first front supporting rod (4) is formed in the slot wall on one side of the slot (8), a grab rail (10) is connected in the slot (8) in a sliding manner, the top end of the grab rail (10) penetrates through a notch of the slot (8), and the grab rail (10) comprises a top seat (11), a base (12) and a grab rail pipe (13);
the top end of the handrail tube (13) is positioned outside the slot (8), a first through hole (14) is formed in one side of the handrail tube, the bottom end of the handrail tube (13) is positioned in the slot (8), and a second through hole (15) corresponding to the connecting hole (9) is formed in one side of the handrail tube;
the handle is characterized in that the footstock (11) is inserted at the top end of the handle pipe (13) and fixedly connected with the handle pipe (13) through a bolt, a sliding cavity (16) corresponding to the position of the first through hole (14) is transversely formed in one side of the footstock (11), a through groove (17) is communicated between the sliding cavity (16) and the first through hole (14), a first sliding groove (18) is communicated between the sliding cavity (16) and the inside of the handle pipe (13), a sliding block (19) is connected in the sliding cavity (16), a button (20) is fixed at one end, close to the through groove (17), of the sliding block (19), one end, deviating from the sliding block (19), of the button (20) sequentially penetrates through the through groove (17) and the first through hole (14), a first spring (21) is fixedly connected between one end, deviating from the through groove (17), of the sliding block (19) and the cavity wall of the sliding cavity (16), and a first inclined surface (22) is arranged at one end, close to the first sliding groove (18), of the sliding block (19), a first push block (23) is connected in the first sliding groove (18) in a sliding manner, the top end of the first push block (23) penetrates out of the first sliding groove (18), a second inclined surface (24) in matched connection with the first inclined surface (22) is arranged, a connecting rod (25) is fixed at the bottom end of the first push block (23), and the bottom end of the connecting rod (25) penetrates into the handrail tube (13) and is fixed with a second push block (26);
the base (12) is inserted into the bottom end of the handrail tube (13) and fixedly connected with the handrail tube (13) through a bolt, a connecting groove (27) corresponding to the position of the second through hole (15) is formed in one side of the base (12), a second sliding groove (28) communicated with the connecting groove (27) is formed in the top end of the base (12), the bottom end of the second push block (26) penetrates into the connecting groove (27) through the second sliding groove (28) and is provided with a third inclined surface (29), a connecting block (30) is connected in the connecting groove (27) in a sliding manner, a connecting pin (31) is fixed on one side, close to the second through hole (15), of the connecting block (30), the other end of the connecting pin (31) penetrates out of the connecting groove (27) and penetrates through the second through hole (15) to be inserted into the connecting hole (9), a second spring (32) is fixedly connected between one side, deviating from the second through hole (15), of the connecting block (30) and the groove wall of the connecting groove (27), and a fourth inclined surface (33) which is matched and connected with the third inclined surface (29) is formed at the top end of the connecting block (30).
2. A single-armrest wide-stepped three-step ladder as claimed in claim 1, wherein: the top of handrail pole (10) is provided with L type and is being piece (34), L type is piece (34) including bushing portion (35) and handle part (36), the top of handrail pole (10) is located in the cover of bushing portion (35) and is fixed with handrail pole (10) through the bolt, set up opening (37) corresponding with first through-hole (14) position on bushing portion (35).
3. A single-armrest wide-stepped three-step ladder as claimed in claim 2, wherein: the grip part (36) is provided with a plurality of grip grains (38).
4. A single armrest wide-stepped three-step ladder as claimed in claim 3, wherein: the grip part (36) is also sleeved with a rubber sleeve.
5. A single-armrest wide-stepped three-step ladder as claimed in claim 1, wherein: the top of base (12) is fixed with spacing strip (39), offer on spacing strip (39) and supply connecting rod (25) to insert and gliding spacing groove (40).
6. A single armrest wide-stepped three-step ladder as claimed in claim 5, wherein: a strip-shaped groove (41) is formed in the groove wall of the second sliding groove (28), and a limiting block (42) which is used for being inserted into the strip-shaped groove (41) and sliding in the strip-shaped groove (41) is fixed on the second pushing block (26).
CN202122084716.2U 2021-08-30 2021-08-30 Single-handrail wide-stepping three-step ladder Active CN215718410U (en)

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CN202122084716.2U CN215718410U (en) 2021-08-30 2021-08-30 Single-handrail wide-stepping three-step ladder

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