CN212837550U

CN212837550U - Simple telescopic ladder foot and telescopic ladder

Info

Publication number: CN212837550U
Application number: CN202020823400.3U
Authority: CN
Inventors: 张钊
Original assignee: Dongguan Prestige Sporting Products Co Ltd
Current assignee: Guangdong Qunwang Technology Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-03-30
Anticipated expiration: 2030-05-15

Abstract

The utility model discloses a simple telescopic ladder leg, which comprises a cross bar, ladder legs, a driving piece and a locking piece, wherein the ladder legs can be extended or folded relative to the cross bar in a sliding way; the driving piece drives the locking piece to enter the locking hole to lock the ladder foot and the cross bar, or drives the locking piece to exit the locking hole to unlock the ladder foot and the cross bar. The simple telescopic ladder foot of the utility model has the advantages of simple structure and convenient operation. In addition, the utility model discloses still disclose a telescopic ladder with low costs.

Description

Simple telescopic ladder foot and telescopic ladder

Technical Field

The utility model relates to a telescopic ladder especially relates to a telescopic ladder foot.

Background

The ladder foot of extension ladder is generally all fixed, and the width of ladder body and ladder foot equals, and when the shrink, each section ladder post of ladder body all collapsible one section ladder post of lower extreme in to make the extension ladder fold up the minimum state, greatly improve the convenience of transportation. However, these extension ladders are not stable in use because of the small width and support range of the ladder legs. If only the ladder feet of the existing extension ladder are lengthened, the supporting range is enlarged, the supporting stability can be improved, but the ladder feet are fixed and can not be folded, so that the space occupied by the folded ladder feet is too large, and the extension ladder is not beneficial to transportation and storage. In addition, although some extension ladders with expandable or collapsible ladder legs exist, the ladder legs of the extension ladders are complex in structure, inconvenient to operate and high in production cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a simple structure, convenient operation's flexible ladder foot of plain type.

Another object of the present invention is to provide a telescopic ladder with simple structure, easy operation and low cost.

In order to achieve the above object, the simple telescopic ladder leg provided by the present invention comprises a cross bar, a ladder leg, a driving member and a locking member, wherein the ladder leg can be extended or folded in a sliding manner relative to the cross bar, the driving member and the locking member are movably disposed on the ladder leg, and the cross bar is provided with a plurality of locking holes along the sliding direction of the ladder leg; the driving piece drives the locking piece to enter the locking hole to lock the ladder foot and the cross bar, or drives the locking piece to exit the locking hole to unlock the ladder foot and the cross bar.

Compared with the prior art, because the utility model discloses a make the ladder foot can be relative the horizontal pole is extended or is folded up with sliding, and set up driving piece and locking piece on the ladder foot, utilize the driving piece drive the locking piece action makes the locking piece can get into or withdraw from the locking hole of horizontal pole, and then right the ladder foot reaches the horizontal pole is expanded each other or is realized locking or is released the lock when folding up, and whole structure only need utilize driving piece and locking piece can realize locking and releasing the lock, and the structure is very simple to whole process only needs to operate the driving piece action can drive the ladder foot is stretched out or is folded up, and it is very convenient to operate.

Preferably, the driving member is provided with a locking position for allowing the locking member to enter the locking hole and a releasing position for allowing the locking member to exit the locking hole, and the driving member can slide to allow the locking member to be located at the locking position or the releasing position.

In particular, the level of the locking bit is greater than the level of the unlocking bit. The locking position and the unlocking position are arranged at different horizontal heights, so that the locking piece can be driven to extend or retract when the driving piece slides, and the purpose of entering or exiting the locking hole is achieved.

Specifically, a guide inclined surface is arranged between the locking position and the unlocking position. Through the arrangement of the guide inclined plane, the locking piece can smoothly slide back and forth between the locking position and the unlocking position, and the smooth and stable locking and unlocking process is ensured.

Specifically, the surface of the driving piece is provided with a groove, and the locking position and the unlocking position are positioned in the groove. The groove can prevent the locking piece from being accidentally separated from the locking position or released from the locking position, and ensures the reliability of the matching.

Specifically, the upper side of the groove is provided with a limit edge for preventing the locking piece from falling off.

Preferably, the driving member intersects with the sliding direction of the locking member.

Preferably, the locking device further comprises an elastic resetting piece, wherein the elastic resetting piece is arranged between the driving piece and the ladder foot so as to drive the locking piece to enter the locking hole through the driving piece. Thus, the locking piece can be kept inserted into the locking hole, so that the locking state of the ladder foot and the cross bar is ensured to be stable, and accidental unlocking is prevented.

Preferably, the driving member includes a driving portion and an operating rod, the driving portion is disposed in the ladder leg, a through hole is disposed on one side of the ladder leg, one end of the operating rod is connected to the driving portion, and the other end of the operating rod slidably extends out of the through hole for operation. Through setting up the action bars can conveniently drive the driving piece improves the convenience of operation.

Specifically, the one end of action bars is equipped with T type link, the drive division is equipped with T type groove, T type link with T type groove detachably cooperation is connected. Because the mounting space in the ladder foot is small, the whole driving part cannot be directly installed in the ladder foot, and therefore, the driving part can be divided into two parts and respectively installed in the ladder foot by utilizing the matching assembly of the T-shaped connecting end and the T-shaped groove, and then the driving part is assembled in the ladder foot, so that the purpose of convenient and quick installation is achieved, and the convenience of assembly is improved.

Preferably, the ladder further comprises a sliding sleeve, wherein the sliding sleeve is fixed at one end of the ladder foot and is in sliding sleeve connection with the cross rod. The sliding sleeve can keep the ladder foot connected with the cross rod when sliding and can guide the extension and retraction of the ladder foot.

Specifically, the middle part of sliding sleeve is equipped with the baffle, the baffle will the sliding sleeve divide into upper ledge and the lower frame that is upper and lower setting, the lower frame with the one end of ladder foot is cup jointed fixedly, the upper ledge with the horizontal pole slides and cup joints.

Specifically, the partition plate is provided with a positioning hole which penetrates through the partition plate from top to bottom, and the locking piece penetrates through the positioning hole and then extends into the locking hole. The positioning hole can limit the locking piece in other directions except the central axis direction of the locking hole, so that the locking piece can be forced to slide only in the central axis direction of the locking hole, and the stability of the locking or unlocking process is ensured.

Preferably, foot sleeves are arranged at two ends of the cross rod, and the ladder feet are sleeved on the foot sleeves in a sliding manner.

The utility model provides a telescopic ladder, includes telescopic ladder main part and plain type telescopic ladder foot, plain type telescopic ladder foot set up in the lower extreme of telescopic ladder main part.

The lower extreme of extension ladder main part is equipped with the podotheca, the ladder foot cup joints with sliding in the podotheca.

Drawings

Fig. 1 is a structural diagram of the telescopic ladder of the present invention.

Fig. 2 is a state diagram of the simple telescopic ladder leg of the present invention when folded.

Fig. 3 is a state diagram of the simple telescopic ladder leg of the present invention when it is unfolded.

Fig. 4 is an exploded view of the simple telescopic ladder foot of the present invention.

Fig. 5 is a transverse sectional view of the simple telescopic ladder leg of the present invention when locked.

Fig. 6 is a transverse sectional view of the simple telescopic ladder foot of the present invention when releasing the lock.

Fig. 7 is a structural diagram of a driving member of the simple telescopic ladder leg of the present invention.

Fig. 8 is a structural diagram of the sliding sleeve of the simple telescopic ladder foot of the present invention.

Detailed Description

In order to explain technical contents, structural features, and effects achieved by the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

As shown in fig. 1 to 5, the extension ladder 100 of the present invention includes a simple extension ladder leg 1 and an extension ladder main body 2, the extension ladder main body 2 has a plurality of telescopic ladder sections 21, and the simple extension ladder leg 1 is disposed at the lower end of the extension ladder main body 2. The simple telescopic ladder leg 1 comprises a cross rod 11, a ladder leg 12, a sliding sleeve 13, a driving part 14, a locking part 15 and an elastic resetting part 16; the locking member 15 of this embodiment is a steel ball. The number of the cross rods 11 is one, two ends of each cross rod 11 are respectively fixed at the lower end of the extension ladder main body 2, foot sleeves 11a are arranged at two ends of each cross rod 11, two foot bodies at the lower end of the extension ladder main body 2 are respectively connected with the foot sleeves 11a in a one-to-one correspondence manner, two ladder feet 12 are provided, the ladder feet 12 can be extended or folded in a sliding manner relative to the cross rods 11, and the sliding direction is along the length extension direction of the cross rods 11; each ladder foot 12 is correspondingly provided with a sliding sleeve 13, a driving member 14, a locking member 15 and an elastic restoring member 16. Taking one of the ladder legs 12 as an example, the ladder leg 12 is slidably sleeved on the foot cover 11 a. The sliding sleeve 13 is fixed at one end of the ladder leg 12 and is slidably sleeved with the cross rod 11, and the sliding sleeve 13 can enable the ladder leg 12 to be connected with the cross rod 11 when sliding and can play a guiding role in extension and retraction of the ladder leg 12. The other end of the ladder foot 12 passes through the foot sleeve 11a and extends outwards, the other end of the ladder foot 12 is connected with a foot support 121, and when the ladder foot 12 contracts, the foot support 121 can be close to the foot sleeve 11a to limit the ladder foot 12. The ladder leg 12 is a hollow tubular structure, the driving member 14 and the locking member 15 are movably arranged in the ladder leg 12, and an opening 122 for extending the locking member 15 is formed in the ladder leg 12; in this embodiment, the driving member 14 and the locking member 15 are both disposed in a sliding manner, the sliding directions of the driving member 14 and the locking member 15 are crossed, specifically, the driving member 14 slides horizontally, the locking member 15 slides vertically, and the sliding directions of the driving member and the locking member are perpendicular. A plurality of locking holes 111 are formed in the bottom surface of the cross bar 11 along the sliding direction of the ladder legs 12, and the central axis direction of the locking holes 111 is along the vertical direction; the driving member 14 drives the locking member 15 into the locking hole 111 to lock the ladder leg 12 and the crossbar 11, or drives the locking member 15 out of the locking hole 111 to unlock the ladder leg 12 and the crossbar 11.

Referring to fig. 5 and 7, a groove 141 is formed on a surface of the driving member 14, the driving member 14 is provided with a locking position 142 for allowing the locking member 15 to enter the locking hole 111 and a releasing position 143 for allowing the locking member 15 to exit the locking hole 111, and the locking position 142 and the releasing position 143 are located in the groove 141. The upper side of the groove 141 is provided with a stopper edge 144 for preventing the locking member 15 from coming out. The driving member 14 can slide to switch the locking member 15 between the locking position 142 and the unlocking position 143. The level of the locking bit 142 is greater than the level of the release bit 143. The locking position 142 and the unlocking position 143 are arranged at different levels, so that the locking element 15 can be driven to extend or retract when the driving element 14 slides, and the purpose of entering or exiting the locking hole 111 is achieved. A guide slope 145 is arranged between the locking position 142 and the unlocking position 143. By providing the guiding slope 145, the locking member 15 can smoothly slide back and forth between the locking position 142 and the unlocking position 143, thereby ensuring smooth and stable locking and unlocking processes. The groove 141 can prevent the locking member 15 from being accidentally disengaged from the locking position 142 or the unlocking position 143, ensuring the reliability of the fitting.

Referring to fig. 5 and 6, the elastic restoring member 16 is disposed between the driving member 14 and the ladder leg 12 to drive the locking member 15 into the locking hole 111 through the driving member 14, a limiting hole 148 is disposed on a side surface of the driving member 14, and at least one end of the elastic restoring member 16 is disposed in the limiting hole 148. The elastic return member 16 is a compression spring. The elastic reset piece 16 can keep the locking piece 15 inserted into the locking hole 111, thereby ensuring the stability of the locking state of the ladder foot 12 and the crossbar 11 and preventing accidental unlocking.

Referring to fig. 5 and 7, the driving member 14 includes a driving portion 146 and an operating rod 147, and the locking portion 142, the unlocking portion 143, the limiting edge 144, the guiding inclined surface 145 and the limiting hole 148 are disposed on the driving portion 146. The driving part 146 is arranged in the ladder foot 12, one side of the ladder foot 12 is provided with a through hole 123, one end of the operating rod 147 is connected with the driving part 146, and the other end of the operating rod slidingly extends out of the through hole 123 and the avoiding hole 13a of the sliding sleeve 13 for operation. By providing the operating lever 147, the driving member 14 can be easily driven, and the convenience of operation can be improved. Specifically, one end of the operating rod 147 is provided with a T-shaped connecting end 1471, one side of the driving portion 146 opposite to the limiting hole 148 is provided with a T-shaped groove 1461 penetrating through both ends, and the T-shaped connecting end 1471 can be inserted from both sides of the T-shaped groove 1461 to be detachably connected with the T-shaped groove 1461 in a matching manner. Because the installation space in the ladder leg 12 is small, the whole driving element 14 cannot be directly installed in the ladder leg 12, the driving element 14 can be divided into two parts and respectively installed in the ladder leg 12 by utilizing the matching assembly of the T-shaped connecting end 1471 and the T-shaped groove 1461, and then the assembly is carried out in the ladder leg 12, thereby achieving the purpose of convenient and quick installation and improving the convenience of assembly.

With reference to fig. 5 and 8, a partition 131 is disposed in the middle of the sliding sleeve 13, the sliding sleeve 13 is divided into an upper frame 132 and a lower frame 133 by the partition 131, the lower frame 133 is fixedly sleeved with one end of the ladder leg 12, and the upper frame 132 is slidably sleeved with the cross bar 11. Specifically, the partition 131 is provided with a positioning hole 1311 penetrating up and down, and the locking member 15 penetrates through the positioning hole 1311 and then extends into the locking hole 111. The positioning hole 1311 may limit the position of the locking member 15 in a direction other than the central axis direction of the locking hole 111, so as to force the locking member 15 to slide only in the central axis direction of the locking hole 111, thereby ensuring stability of the locking or unlocking process.

In summary, and as shown in fig. 1 to 6, the working principle of the simple telescopic ladder leg 1 of the telescopic ladder 100 of the present invention is described in detail as follows:

when the foldable bicycle needs to be unfolded from the folded state, the operating rod 147 is pressed, so that the operating rod 147 drives the driving member 14 to slide and compress the elastic resetting member 16, at this time, one end of the locking member 15 slides from the locking position 142 to the unlocking position 143 along the guide inclined surface 145, and the other end of the locking member 15 exits from the locking hole 111; at this time, the ladder foot 12 can be unlocked relative to the crossbar 11, i.e. the ladder foot 12 can be pulled to slide and extend outwards for unfolding. When the locking member 15 is aligned with the locking hole 111 at the other end of the cross bar 11 after the ladder leg 12 is completely unfolded, the driving member 14 is reset by the elastic force of the elastic reset member 16, so that one end of the locking member 15 slides along the guide slope 145 from the release position 143 to the locking position 142, and the other end of the locking member 15 is inserted into the locking hole 111 to re-lock the ladder leg 12 and the cross bar 11. Similarly, when the ladder needs to be folded from the unfolded state, the operating rod 147 is also pressed to unlock the ladder legs 12 and the cross bar 11, then the ladder legs 12 are pushed inward to the inner side of the telescopic ladder 100, and finally, the locking members 15 automatically lock the ladder legs 12 and the cross bar 11 through the elastic restoring members 16.

Compared with the prior art, because the utility model discloses a make ladder foot 12 can be relative horizontal pole 11 extends or folds up with sliding, and set up driving piece 14 and locking piece 15 on the ladder foot 12, utilize driving piece 14 drive locking piece 15 moves, makes locking piece 15 can get into or withdraw from the locking hole 111 of horizontal pole 11, and then right ladder foot 12 reaches realize locking or releasing when horizontal pole 11 expandes or folds up each other, whole structure only need utilize driving piece 14 and locking piece 15 can realize locking and releasing, and the structure is very simple, and whole process only need operate driving piece 14 moves and can drive ladder foot 12 stretches out or folds up, and it is very convenient to operate.

The structure of the extension ladder body 2 to which the extension ladder 100 of the present invention relates is well known to those skilled in the art and will not be described in detail herein.

The above disclosure is only a preferred embodiment of the present invention, and certainly, the scope of the present invention should not be limited thereto, and therefore, the scope of the present invention is not limited to the above embodiments.

Claims

1. The utility model provides a simple type ladder foot that stretches out and draws back which characterized in that: the ladder comprises cross bars, ladder legs, driving parts and locking parts, wherein the ladder legs can be extended or folded in a sliding manner relative to the cross bars, the driving parts and the locking parts are movably arranged on the ladder legs, and the cross bars are provided with a plurality of locking holes along the sliding direction of the ladder legs; the driving piece drives the locking piece to enter the locking hole to lock the ladder foot and the cross bar, or drives the locking piece to exit the locking hole to unlock the ladder foot and the cross bar.

2. A simple telescopic ladder foot as claimed in claim 1, characterised in that: the driving piece is provided with a locking position enabling the locking piece to enter the locking hole and a releasing position enabling the locking piece to exit the locking hole, and when the driving piece slides, the locking piece can be located at the locking position or the releasing position.

3. A simple telescopic ladder foot as claimed in claim 2, characterised in that: the level of the locking bit is greater than the level of the unlocking bit.

4. A simple telescopic ladder foot as claimed in claim 2, characterised in that: a guide inclined plane is arranged between the locking position and the unlocking position.

5. A simple telescopic ladder foot as claimed in claim 2, characterised in that: the surface of the driving piece is provided with a groove, and the locking position and the unlocking position are positioned in the groove.

6. A simple telescopic ladder foot as claimed in claim 5, characterised in that: the upper side of the groove is provided with a limiting edge for preventing the locking piece from being separated.

7. A simple telescopic ladder foot as claimed in claim 1, characterised in that: the driving piece is crossed with the sliding direction of the locking piece.

8. A simple telescopic ladder foot as claimed in claim 1, characterised in that: still include the elasticity piece that resets, the elasticity reset the piece set up in driving piece with between the ladder foot in order to pass through the driving piece orders about the locking piece gets into the locking hole.

9. A simple telescopic ladder foot as claimed in claim 1, characterised in that: the driving piece comprises a driving part and an operating rod, the driving part is arranged in the ladder foot, a through hole is formed in one side of the ladder foot, one end of the operating rod is connected with the driving part, and the other end of the operating rod slidingly extends out of the through hole for operation.

10. A simple telescopic ladder foot as claimed in claim 9, characterised in that: one end of the operating rod is provided with a T-shaped connecting end, the driving portion is provided with a T-shaped groove, and the T-shaped connecting end is detachably connected with the T-shaped groove in a matched mode.

11. A simple telescopic ladder foot as claimed in claim 1, characterised in that: the ladder comprises ladder legs, and is characterized by further comprising sliding sleeves, wherein the sliding sleeves are fixed at one ends of the ladder legs and are in sliding sleeve connection with the cross rods.

12. A simple telescopic ladder foot as defined in claim 11, wherein: the middle part of sliding sleeve is equipped with the baffle, the baffle will the sliding sleeve divide into upper ledge and the lower frame that is upper and lower setting, the lower frame with the one end of ladder foot cup joints fixedly, the upper ledge with the horizontal pole slides and cup joints.

13. A simple telescopic ladder foot as defined in claim 12, wherein: the partition plate is provided with a positioning hole which penetrates through the partition plate from top to bottom, and the locking piece penetrates through the positioning hole and then extends into the locking hole.

14. A simple telescopic ladder foot as claimed in claim 1, characterised in that: foot sleeves are arranged at two ends of the cross rod, and the ladder feet are sleeved on the foot sleeves in a sliding manner.

15. A telescopic ladder is characterized in that: comprising a ladder body and a simple telescopic ladder leg as claimed in any one of claims 1 to 14, which is arranged at the lower end of the ladder body.

16. A telescopic ladder as claimed in claim 15, wherein: the lower extreme of extension ladder main part is equipped with the podotheca, the ladder foot cup joints with sliding in the podotheca.