CN217712389U - Household ladder with one-key-folded handrail - Google Patents

Abstract

The utility model provides a domestic ladder that handrail one key was closed, including folding ladder body and U type handrail frame, the folding ladder body includes front tube and back tube, U type handrail frame includes bar and connecting rod, the cavity has been seted up in the bar, slide opening and through-hole have been seted up to the bar bottom, the spout has been seted up on the connecting rod top, the fixed orifices has been seted up to the connecting rod bottom, be provided with the horizontal pole in the cavity, the horizontal pole bottom mounting has the pulling piece, be connected with first spring between the bottom chamber wall of horizontal pole and cavity, the horizontal pole bottom mounting has the montant, the montant bottom is provided with first inclined plane, the spread groove has been seted up on the inside wall of front tube, sliding connection has the connecting block in the spread groove, be connected with the second spring between the cell wall of connecting block and spread groove, the other end of connecting block is provided with the second inclined plane. The utility model discloses can insert the connecting rod of U type handrail frame in the front tube to receive and close U type handrail frame, U type handrail frame occupation space not, the collection of being convenient for is placed and is transported, and receive and close the process of U type handrail frame swiftly convenient.

Description

Household ladder with one-key-folded handrail

Technical Field

The utility model relates to a ladder technical field specifically is a domestic ladder that handrail key was closed and is closed.

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.

Chinese patent with publication number CN209637668U discloses a folding household ladder, the back tube that includes the head tube that two side by side set up and two side by side set up, two liang of mutual articulations of head tube and back tube, be connected with flexible handrail on the top of two head tubes, flexible handrail includes two telescopic links of pegging graft in the head tube, the horizontal pole is connected on the top of two telescopic links, still include a pull rod, it has the stroke groove to open on the head tube, the one end of pull rod is passed the stroke groove and is articulated with the end of telescopic link, the other end is articulated with the back tube, this application handrail is extending structure, can withdraw the handrail during packing or transportation, volume when reducing the packing carton transportation.

And simultaneously, the utility model discloses also provide a technical scheme and solve foretell handrail and can occupy extra space, be not convenient for collect and place, also be not convenient for the problem of packing transportation.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a domestic ladder that handrail key was closed and is closed in order to solve the handrail and can occupy extra space, the collection of not being convenient for is placed, also is not convenient for the problem of packing transportation.

A household ladder with one-key-folded handrails comprises a folding ladder body, a U-shaped handrail frame and a rotatable and foldable pedal structure, wherein the folding ladder body comprises two front tubes and two rear tubes, the two front tubes correspond to the two rear tubes one by one, and the top ends of the two front tubes and the two rear tubes are rotatably connected;

the U-shaped armrest frame comprises an armrest rod and two connecting rods, the top ends of the two connecting rods are fixedly connected with the left side and the right side of the bottom end of the armrest rod respectively, and the bottom ends of the two connecting rods are inserted into the two front pipes in a sliding connection mode respectively;

the novel handrail is characterized in that a cavity is formed in the handrail, a sliding hole communicated with the cavity is formed in the middle position of the bottom end of the handrail, through holes communicated with the cavity are formed in the left side and the right side of the bottom end of the handrail, sliding grooves consistent with the extending direction of the connecting rod are formed in the top end of the connecting rod, the sliding grooves correspond to the through holes, fixing holes communicated with the sliding grooves are formed in the two sides of the bottom end of the connecting rod, a cross rod is arranged in the cavity and slides up and down along the cavity, a pulling block corresponding to the sliding hole is fixed at the bottom end of the cross rod, the bottom end of the pulling block penetrates out of the cavity through the sliding hole, a plurality of first springs are fixedly connected between the bottom end of the cross rod and the wall of the bottom end of the cavity, vertical rods are fixed on the left side and the right side of the bottom end of the cross rod, the two vertical rods correspond to the two sliding grooves respectively, the bottom ends of the vertical rods penetrate into the sliding grooves in a sliding connection mode through the through holes, and first inclined planes are arranged on the two sides of the vertical rods;

two the spread groove that two symmetries set up, two all seted up on the inside wall of front tube the spread groove corresponds two fixed orificess respectively, sliding connection has the connecting block in the spread groove, fixedly connected with second spring between the one end of connecting block and the cell wall of spread groove, in the other end of connecting block worn out the spread groove and penetrated the spout through the fixed orifices, and be provided with first inclined plane assorted second inclined plane.

Through adopting above-mentioned technical scheme, when U type handrail frame is accomodate to needs, the user of service holds between the fingers and pulls the piece on wearing out the one end of cavity and pulling downwards, the pulling piece drives the horizontal pole along cavity downstream, first spring is compressed and forms ascending bounce, and simultaneously, the horizontal pole drives the montant and moves downwards along the spout, first inclined plane presses on the second inclined plane, the effort of being used in on the second inclined plane can be decomposed into the power in the orientation spread groove, the connecting block removes in the spread groove under the effect of this power, the second spring is compressed and is formed the bounce outside the spread groove. When horizontal pole and montant can't the lapse, wear out the one end of connecting groove on the connecting block and press on the lateral wall of montant, the second inclined plane corresponds with the position of fixed orifices. And then the pulling block is pulled downwards, because the transverse rod and the vertical rod cannot continue to move downwards, the acting force pulled downwards is transmitted to the grab bar, the grab bar moves downwards, the grab bar drives the connecting rod to move towards the inside of the front pipe, the hole wall of the fixing hole is contacted with the second inclined surface, the connecting block is continuously pressed towards the inside of the connecting groove, and the connecting rod can smoothly move downwards to the inside of the front pipe. When the connecting rod is completely positioned in the sliding groove, the grab rail is positioned above the front pipe, and the connecting block is pressed on the outer side wall of the connecting rod under the action of the rebounding force of the second spring. After the pulling block is loosened, the cross rod and the vertical rod are reset under the action of the rebounding force of the first spring. Similarly, when the U-shaped armrest frame needs to be pulled out, a user holds the grab rail and moves the grab rail upwards, the grab rail drives the connecting rod to move upwards and pull out from the front pipe, when the fixing hole corresponds to the connecting groove, the connecting block penetrates through the fixing hole and is inserted into the sliding groove under the action of the rebounding force of the second spring, at the moment, the hole wall of the fixing hole corresponds to the upper side wall and the lower side wall of the connecting block, the connecting rod is fixed by the connecting block, and the connecting rod cannot move upwards and cannot move downwards. The utility model discloses can insert the connecting rod of U type handrail frame in the front tube to receive and close U type handrail frame, U type handrail frame occupation space not, the collection of being convenient for is placed and is transported, and receive and close the process of U type handrail frame swiftly convenient.

The utility model discloses a further setting: and a third spring is fixedly connected between the bottom end of the vertical rod and the bottom groove wall of the sliding groove.

Through adopting above-mentioned technical scheme, when the montant downstream, the third spring is compressed and is formed ascending bounce, mutually supports with first spring, guarantees when loosening the power of acting on pulling the piece, and horizontal pole and montant can the rebound reset. And can further avoid horizontal pole and montant to remove down under the effect of self gravity.

The utility model discloses a further set up: the outside cover of third spring is equipped with the stop collar, the stop collar includes inner tube and outer tube, the top of inner tube and the bottom fixed connection of montant, the bottom of inner tube penetrates in the outer tube with sliding connection's mode, the bottom of outer tube and the bottom cell wall fixed connection of spout.

Through adopting above-mentioned technical scheme, along with the compression and the reseing of third spring, the inner tube reciprocates in the outer tube to make stop collar cover all the time in the outside of third spring, avoid the third spring distortion of buckling.

The utility model discloses a further setting: the inner side wall of the outer pipe is provided with a limiting groove, and the outer side wall of the inner pipe is fixed with a limiting block which is used for being inserted into the limiting groove and sliding along the limiting groove.

Through adopting above-mentioned technical scheme, when the inner tube reciprocated in the outer tube, the stopper reciprocated in the spacing groove, stability when on the one hand can promote the inner tube and reciprocate, on the other hand can prevent that the inner tube from falling out from the outer tube.

The utility model discloses a further set up: and a pulling ring is fixed at one end of the pulling block, which penetrates out of the cavity.

Through adopting above-mentioned technical scheme, the setting of pulling ring can make the staff more conveniently pull the pulling piece.

The utility model discloses a further set up: the outside cover of pulling the ring is equipped with the rubber sleeve.

Through adopting above-mentioned technical scheme, the setting of rubber sleeve has played the effect of preventing static, and has promoted the travelling comfort on pulling ring surface.

The utility model discloses a further setting: the transverse rods and the vertical rods are made of plastic materials.

Through adopting above-mentioned technical scheme, the weight of horizontal pole and montant is less, avoids the weight compression first spring and third spring of horizontal pole and montant self. And the plastic material is more wear-resistant, so that the cross rod and the vertical rod are prevented from being worn after repeatedly moving up and down.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a domestic ladder that handrail one key was closed is closed, the utility model discloses can insert the connecting rod of U type handrail frame in the front tube to receive and close U type handrail frame, U type handrail frame occupation space not, the collection of being convenient for is placed and is transported, and the process of receiving and close U type handrail frame is swift convenient.

Drawings

Fig. 1 is a schematic structural view of a household ladder with one-key-folded handrail of the present invention;

fig. 2 is a cross-sectional view of the handrail frame and the front tube of the household ladder with one-key-folded handrail of the present invention;

fig. 3 is an enlarged view of a point a in fig. 2.

Reference numerals: 1. a folding ladder body; 2. a U-shaped armrest frame; 3. a pedal structure; 4. a head tube; 5. a rear tube; 6. a grab rail; 7. a connecting rod; 8. a cavity; 9. a chute; 10. a fixing hole; 11. a cross bar; 12. pulling the block; 13. a first spring; 14. a vertical rod; 15. a first inclined surface; 16. connecting grooves; 17. connecting blocks; 18. a second spring; 19. a second inclined surface; 20. a third spring; 21. a limiting sleeve; 22. an inner tube; 23. an outer tube; 24. a limiting groove; 25. a limiting block; 26. the ring is pulled.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

A household ladder with one-key-folded handrail comprises a folding ladder body 1, a U-shaped handrail frame 2 and a rotatable and foldable pedal structure 3, as shown in figures 1-3. The folding ladder body 1 comprises two front tubes 4 and two rear tubes 5, wherein the two front tubes 4 correspond to the two rear tubes 5 one by one, and the top ends of the front tubes and the rear tubes are rotatably connected.

The rotatable and 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 U-shaped handrail frame 2 comprises a handrail rod 6 and two connecting rods 7. The top ends of the two connecting rods 7 are respectively and fixedly connected with the left side and the right side of the bottom end of the grab bar 6, and the bottom ends of the two connecting rods 7 are respectively inserted into the two front tubes 4 in a sliding connection mode.

The inside of the grab rail 6 is provided with a cavity 8. A slide hole (not shown in the figure) communicated with the cavity 8 is arranged at the middle position of the bottom end of the grab rail 6. The left and right sides of the bottom end of the grab bar 6 are provided with through holes (not shown in the figure) communicated with the cavity 8. The top end of the connecting rod 7 is provided with a sliding chute 9 which is consistent with the extending direction of the connecting rod 7, and the sliding chute 9 corresponds to the position of the through hole. Both sides of the bottom end of the connecting rod 7 are provided with fixing holes 10 communicated with the sliding grooves 9.

A cross bar 11 is arranged in the cavity 8, and the cross bar 11 slides up and down along the cavity 8. The bottom end of the cross rod 11 is fixed with a pulling block 12 corresponding to the position of the slide hole, and the bottom end of the pulling block 12 passes through the cavity 8 through the slide hole and is fixed with a pulling ring 26. A plurality of first springs 13 are fixedly connected between the bottom end of the cross rod 11 and the bottom end cavity wall of the cavity 8. The bottom left and right sides of horizontal pole 11 all is fixed with montant 14, and two montants 14 correspond two spouts 9 respectively, and the bottom of montant 14 passes through the through-hole and penetrates in spout 9 with sliding connection's mode and its both sides all are provided with first inclined plane 15. A third spring 20 is fixedly connected between the bottom end of the vertical rod 14 and the bottom end groove wall of the sliding groove 9. The outside cover of third spring 20 is equipped with stop collar 21, and stop collar 21 includes inner tube 22 and outer tube 23, the top of inner tube 22 and the bottom fixed connection of montant 14, and in the bottom of inner tube 22 penetrated outer tube 23 with sliding connection's mode, the bottom of outer tube 23 and the bottom cell wall fixed connection of spout 9. A limiting groove 24 is formed in the inner side wall of the outer tube 23, and a limiting block 25 which is used for being inserted into the limiting groove 24 and sliding along the limiting groove 24 is fixed on the outer side wall of the inner tube 22.

Two connecting grooves 16 symmetrically arranged are formed in the inner side walls of the two front pipes 4, and the two connecting grooves 16 correspond to the two fixing holes 10 respectively. Connecting block 17 is slidably connected in connecting groove 16, fixedly connected with second spring 18 between the one end of connecting block 17 and the cell wall of connecting groove 16, and in connecting groove 16 was worn out and the spout 9 was penetrated through fixed orifices 10 to the other end of connecting block 17, and was provided with the second inclined plane 19 with first inclined plane 15 assorted.

Additionally, the pull ring 26 is externally sleeved with a rubber sleeve (not shown). The rubber sleeve plays a role in preventing static electricity and improves the comfort of the surface of the pulling ring 26.

The cross bar 11 and the vertical bar 14 are both made of plastic materials. The weight of the cross bar 11 and the vertical bar 14 is small, and the self weight of the cross bar 11 and the vertical bar 14 is prevented from compressing the first spring 13 and the third spring 20. And the plastic material is more wear-resistant, so that the cross rod 11 and the vertical rod 14 are prevented from being worn after repeatedly moving up and down.

The working principle is as follows: when the U-shaped armrest frame 2 needs to be stored, the user pulls the pull block 12 downward through the pull ring 26. The pulling block 12 moves the cross bar 11 downwards along the cavity 8, and the first spring 13 is compressed to form an upward rebounding force. At the same time, the cross bar 11 drives the vertical bar 14 to move downwards along the sliding groove 9. The first inclined surface 15 presses against the second inclined surface 19 and the force acting on the second inclined surface 19 can be resolved into a force directed into the coupling groove 16. The connecting piece 17 moves inward toward the connecting groove 16 by this force, and the second spring 18 is compressed to form a repulsive force toward the outside of the connecting groove 16. Meanwhile, the third spring 20 is compressed to form an upward rebounding force, and the inner tube 22 moves downward in the outer tube 23, so that the stop sleeve 21 is always sleeved outside the third spring 20, and the third spring 20 is prevented from being bent and twisted. When the inner tube 22 moves up and down in the outer tube 23, the limiting block 25 moves up and down in the limiting groove 24, so that on one hand, the stability of the inner tube 22 during moving up and down can be improved, and on the other hand, the inner tube 22 can be prevented from falling out of the outer tube 23.

When the cross bar 11 and the vertical bar 14 cannot move downwards, one end of the connecting block 17 penetrating through the connecting groove 16 is pressed on the side wall of the vertical bar 14, and the second inclined surface 19 corresponds to the position of the fixing hole 10. Then the pulling block 12 is pulled downwards, because the cross rod 11 and the vertical rod 14 can not move downwards continuously, the acting force pulled downwards is transferred to the grab bar 6, the grab bar 6 moves downwards, and the grab bar 6 drives the connecting rod 7 to move towards the front tube 4. The hole wall of the fixing hole 10 contacts the second inclined surface 19, the connecting block 17 is continuously pressed into the connecting groove 16, and the connecting rod 7 can smoothly move downward into the head pipe 4.

When the connecting rod 7 is completely located in the slide groove 9, the grab bar 6 is located above the front tube 4, and the connecting block 17 is pressed against the outer side wall of the connecting rod 7 by the resilient force of the second spring 18. After the pulling block 12 is released, the cross rod 11 and the vertical rod 14 can move upwards and return under the cooperation of the resilience of the first spring 13 and the third spring 20. And the first spring 13 and the third spring 20 can prevent the cross bar 11 and the vertical bar 14 from moving downwards under the action of self gravity.

Similarly, when the U-shaped armrest frame 2 needs to be pulled out, a user holds the armrest rod 6 and moves the armrest rod 6 upwards, the armrest rod 6 drives the connecting rod 7 to move upwards and pull out from the front tube 4, and when the fixing hole 10 corresponds to the connecting groove 16, one end of the connecting block 17 penetrates through the fixing hole 10 and is inserted into the sliding groove 9 under the effect of the rebounding force of the second spring 18. At this time, the hole wall of the fixing hole 10 corresponds to the upper and lower side walls of the connecting block 17, the connecting rod 7 is fixed by the connecting block 17, and the connecting rod 7 cannot move upwards or downwards.

The utility model discloses can insert the connecting rod 7 of U type handrail frame 2 in the head tube 4 to it does not occupation space to receive and close U type handrail frame 2,U type handrail frame 2, is convenient for collect and places and transport, and receives and close the swift convenience of process of collecting U type handrail frame 2.

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 the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to 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 "first" and "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 is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "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 meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention 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 (7)

1. The utility model provides a domestic ladder that handrail a key was closed and is closed, includes folding ladder body (1), U type handrail frame (2) and rotatable footboard structure (3) of folding, folding ladder body (1) includes two head tubes (4) and two back tubes (5), two head tube (4) and two back tubes (5) one-to-one, and its top rotates to be connected its characterized in that:

the U-shaped handrail frame (2) comprises a handrail rod (6) and two connecting rods (7), the top ends of the two connecting rods (7) are fixedly connected with the left side and the right side of the bottom end of the handrail rod (6) respectively, and the bottom ends of the two connecting rods (7) are inserted into the two front tubes (4) in a sliding connection mode respectively;

a cavity (8) is formed in the armrest rod (6), a sliding hole communicated with the cavity (8) is formed in the middle position of the bottom end of the armrest rod (6), through holes communicated with the cavity (8) are formed in the left side and the right side of the bottom end of the armrest rod (6), a sliding groove (9) consistent with the extending direction of the connecting rod (7) is formed in the top end of the connecting rod (7), the sliding groove (9) corresponds to the through hole, fixing holes (10) communicated with the sliding groove (9) are formed in the two sides of the bottom end of the connecting rod (7), a cross rod (11) is arranged in the cavity (8), the cross rod (11) slides up and down along the cavity (8), a pulling block (12) corresponding to the sliding hole is fixed at the bottom end of the cross rod (11), a plurality of first springs (13) are fixedly connected between the bottom end of the cross rod (11) and the cavity wall of the bottom end of the cavity (8) through the sliding hole, vertical rods (14) are fixed at the left side and the right side of the bottom end of the cross rod (11), two vertical rods (14) penetrate through the sliding grooves (9), and two sliding grooves (9) are connected with a first inclined plane (15);

two connecting groove (16) that two symmetries set up are all seted up on the inside wall of head tube (4), two connecting groove (16) corresponds two fixed orificess (10) respectively, sliding connection has connecting block (17) in connecting groove (16), fixedly connected with second spring (18) between the one end of connecting block (17) and the cell wall of connecting groove (16), the other end of connecting block (17) is worn out connecting groove (16) and is penetrated in spout (9) through fixed orifices (10), and be provided with first inclined plane (15) assorted second inclined plane (19).

2. The ladder as claimed in claim 1, wherein: and a third spring (20) is fixedly connected between the bottom end of the vertical rod (14) and the bottom end groove wall of the sliding groove (9).

3. The ladder as claimed in claim 2, wherein the ladder further comprises: the outside cover of third spring (20) is equipped with stop collar (21), stop collar (21) include inner tube (22) and outer tube (23), the top of inner tube (22) and the bottom fixed connection of montant (14), the bottom of inner tube (22) penetrates in outer tube (23) with sliding connection's mode, the bottom of outer tube (23) and the bottom cell wall fixed connection of spout (9).

4. The ladder as claimed in claim 3, wherein the ladder further comprises: a limiting groove (24) is formed in the inner side wall of the outer pipe (23), and a limiting block (25) which is used for being inserted into the limiting groove (24) and sliding along the limiting groove (24) is fixed on the outer side wall of the inner pipe (22).

5. The ladder as claimed in claim 1, wherein: a pulling ring (26) is fixed at one end of the pulling block (12) which penetrates through the cavity (8).

6. The ladder of claim 5, wherein: the outer part of the pulling ring (26) is sleeved with a rubber sleeve.

7. The ladder as claimed in claim 1, wherein: the transverse rods (11) and the vertical rods (14) are both made of plastic materials.

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