CN109882067B

CN109882067B - Telescopic sleeve and ladder telescopic foot

Info

Publication number: CN109882067B
Application number: CN201910192501.7A
Authority: CN
Inventors: 张钊
Original assignee: Guangdong Qunwang Technology Co ltd
Current assignee: Guangdong Qunwang Technology Co ltd
Priority date: 2019-03-13
Filing date: 2019-03-13
Publication date: 2024-05-28
Anticipated expiration: 2039-03-13
Also published as: CN109882067A

Abstract

The invention discloses a telescopic sleeve, which comprises an inner pipe, an outer pipe and a lock releasing mechanism, wherein the inner pipe and the outer pipe are mutually sleeved and sliding, the lock releasing mechanism is arranged in the inner pipe and comprises a driving piece, a seat body, a middle shaft, a swing arm and a locking pin; the inner tube is fixed on the outer tube, the inner tube is fixed on the inner tube, the middle part of the swing arm is pivoted to the inner tube through the middle shaft, the locking pin is slidably arranged and can extend out of the outer side of the inner tube, the outer tube is provided with a locking hole, the driving piece is slidably arranged on the inner tube and drives the swing arm to swing, so that the other end of the swing arm drives the locking pin to insert into or withdraw from the locking hole, and the inner tube and the outer tube are mutually locked or unlocked. The telescopic sleeve can be mutually slid and unfolded after releasing the lock or locked after sliding and shrinking, so that the occupied space of the sleeve is reduced, the operation is simple, and the use is convenient. In addition, the invention also discloses a ladder telescopic foot which saves space, is convenient to store and carry and has attractive appearance.

Description

Telescopic sleeve and ladder telescopic foot

Technical Field

The invention relates to a ladder, in particular to a telescopic sleeve and a telescopic foot of the ladder.

Background

The ladder foot of the telescopic ladder is generally fixed, the width of the ladder body and the width of the ladder foot are equal, and when the telescopic ladder is contracted, each section of ladder post of the ladder body can be contracted into one section of ladder post at the lowest end, so that the telescopic ladder is folded to a minimum state, and the convenience of transportation is greatly improved. However, these ladders are not stable in use because of the small width of the feet and the small support range. If the ladder feet of the existing telescopic ladder are only lengthened, the supporting range is enlarged, and the supporting stability of the telescopic ladder can be improved, but the ladder feet are fixed and can not be folded, so that the space occupied by the telescopic ladder feet after folding is overlarge, and the telescopic ladder is unfavorable for transportation and storage. In addition, although there are some telescopic ladders in which the ladder legs can be unfolded or folded, the ladder legs of these telescopic ladders are complicated in structure and exposed, so that the operation is inconvenient and the appearance is not attractive.

Disclosure of Invention

The invention aims to provide a telescopic sleeve, which is internally provided with a lock release mechanism, so that the telescopic sleeve can be mutually and slidably unfolded after releasing the lock or can be locked after sliding and shrinking, the occupied space of the sleeve is reduced, the operation is simple, and the use is convenient.

Another object of the present invention is to provide a telescopic foot for a ladder, in which the foot support can extend out of the support ladder when in use, so that the ladder is more stable, or can be contracted when not in use, so as to save space, and the telescopic foot is convenient to store and carry, and has an attractive appearance.

In order to achieve the above purpose, the telescopic tube comprises an inner tube, an outer tube and a lock release mechanism, wherein the inner tube and the outer tube are sleeved and slide with each other, the lock release mechanism is arranged in the inner tube and comprises a driving piece, a seat body, a middle shaft, a swing arm and a locking pin; the inner tube is fixed on the outer tube, the inner tube is fixed on the inner tube, the middle part of the swing arm is pivoted to the inner tube through the middle shaft, the locking pin is slidably arranged and can extend out of the outer side of the inner tube, the outer tube is provided with a locking hole, the driving piece is slidably arranged on the inner tube and drives the swing arm to swing, so that the other end of the swing arm drives the locking pin to insert into or withdraw from the locking hole, and the inner tube and the outer tube are mutually locked or unlocked.

Compared with the prior art, the inner pipe and the outer pipe are made to slide mutually, the swing arm is arranged on the base body by utilizing the middle shaft, the locking pin is arranged on the inner pipe in a sliding manner and can extend out of the inner pipe, and the swing arm is driven by utilizing the driving piece, so that the swing arm swings and drives the locking pin to be inserted into the locking hole of the outer pipe, and the relative positions of the inner pipe and the outer pipe are locked, so that the inner pipe and the outer pipe can be locked after being unfolded or contracted; the inner tube and the outer tube can reduce occupied space after being contracted and locked, and only the driving piece is required to be driven to act when the device is used, so that the device is simple to operate and convenient to use; in addition, the lock releasing mechanism is arranged in the inner pipe, so that the lock releasing mechanism can be prevented from being exposed, and the whole lock releasing mechanism is attractive.

Preferably, the lock releasing mechanism further comprises a driving rod, one end of the driving rod is connected with the driving piece, and the other end of the driving rod extends out of the outer tube. Because the driving piece is positioned in the inner tube, the driving rod is arranged, so that the driving rod extends to the outer tube, the operation of a user can be facilitated, and the use convenience is improved.

Specifically, the lock release mechanism further comprises an operation button, wherein the operation button is connected to the other end of the driving piece, so that the driving rod pushes the driving piece to slide through pressing.

Preferably, the lock release mechanism further includes a first elastic member that provides an elastic force for inserting the locking pin into the locking hole. The first elastic piece can enable the locking pin to be automatically inserted into the locking hole, and further enable the inner tube and the outer tube to be automatically locked.

Specifically, the first elastic piece is a torsion spring, and the torsion spring is sleeved on the middle shaft and abuts against the swing arm.

Preferably, the inner wall of the outer tube is provided with a fixing rod extending along the sliding direction of the inner tube, and the locking hole is formed in the fixing rod. The fixing rod is arranged, and the locking hole is formed in the fixing rod, so that the locking hole can be prevented from being formed outside the outer tube, and the attractiveness of the outer tube is improved.

Preferably, a sliding groove is formed in the outer side of the inner tube, a sliding block is arranged on the inner wall of the outer tube, and the sliding block is slidably arranged on the sliding groove. The sliding groove is matched with the sliding block, so that the inner tube can slide more stably and accurately.

Preferably, the central axis of the locking pin is perpendicular to the central axis.

Specifically, the lock releasing mechanism further comprises a connecting shaft, the connecting shaft is connected with the locking pin, the base body is provided with a long hole extending along the sliding direction of the locking pin, the other end of the swing arm is provided with a driving inclined hole inclined relative to the long hole, and the connecting shaft is parallel to the central shaft and slidably penetrates through the driving inclined hole and the long hole. Through setting up connecting axle and drive inclined hole, can make the swing force of swing arm changes the drive the locking pin to the axial thrust that the locking hole slided realizes the locking of locking pin to inner tube and outer tube.

A ladder telescopic foot comprises a foot support and a telescopic sleeve, wherein the foot support is connected to the outer end of an inner tube.

Preferably, the foot support is provided with a mounting seat, and the mounting seat is mounted in the outer end of the inner tube.

Specifically, the ladder telescopic foot still includes callus on the sole and branch, be equipped with the regulation hole vertically on the heel brace, branch slidable adjustment ground set up in the regulation hole, and the lower extreme with the callus on the sole is connected.

Specifically, the ladder telescoping foot also comprises a locking mechanism, wherein the locking mechanism is clamped with the support rod so as to lock the foot pad.

Specifically, locking mechanical system includes locking piece, drive shaft and operating piece, one side of mount pad is equipped with the intercommunication the through-hole in regulation hole, the drive shaft pin joint in on the mount pad and pin joint axis with the center pin in regulation hole is perpendicular, the both ends of drive shaft stretch out the outer tube with the operating piece is connected, the locking piece is fixed in the drive shaft, the drive shaft rotates and can drive the locking piece and pass through the through-hole stretches into in the regulation hole or withdraw from the regulation hole, in order to with branch block or separation.

Specifically, the locking mechanism further includes a second elastic member that provides an elastic force that withdraws the locking member from the adjustment aperture. By arranging the second elastic piece, the locking piece can be automatically clamped with the supporting rod, and the purpose of self-locking is achieved.

Specifically, the second elastic piece is a torsion spring, one end of the torsion spring abuts against the locking piece, and the other end of the torsion spring abuts against the mounting seat.

Specifically, the locking piece is provided with clamping teeth, and lines meshed with the clamping teeth are arranged on the outer side of the supporting rod.

Drawings

Fig. 1 is a schematic view of the structure of the telescopic ladder of the present invention.

Figure 2 is an exploded view of the ladder telescoping foot of the telescoping ladder of the present invention.

Figure 3 is a cross-sectional top view of the internal structure of the ladder telescoping foot of the telescoping ladder of the present invention.

FIG. 4 is a cross-sectional view of the footpad and locking mechanism of FIG. 3.

Figure 5 is a cross-sectional side view of the ladder telescoping foot of the telescoping ladder of the present invention.

Fig. 6 is an enlarged view of a portion a in fig. 5.

Fig. 7 is a cross-sectional structural view of the release mechanism of fig. 3.

Fig. 8 is an enlarged view of a portion B in fig. 5.

Fig. 9 is a state diagram of the extension of the sub extension leg of the extension ladder of the present invention.

Detailed Description

In order to describe the technical content, the constructional features and the effects achieved by the present invention in detail, the following description is made with reference to the embodiments in conjunction with the accompanying drawings.

As shown in fig. 1 and 2, the invention discloses a telescopic ladder 100, which comprises a telescopic ladder body 101 and two oppositely arranged ladder telescopic legs 102, wherein each ladder telescopic leg 102 comprises a foot support 1 and a telescopic sleeve 2, each telescopic sleeve 2 comprises an inner pipe 21 and an outer pipe 22, the cross section of each inner pipe 21 is in an i-shaped structure, the inner pipe 21 is sleeved in the outer pipe 22 and can slidably extend out or retract into the outer pipe 22, each foot support 1 is provided with a mounting seat 11, and the mounting seat 11 is mounted in the outer end of each inner pipe 21 so as to fix the foot support 1 outside the corresponding inner pipe 21.

As shown in fig. 2, 3 and 4, the telescopic foot 102 of the ladder further comprises a foot pad 3, a supporting rod 4 and a locking mechanism 5, the foot support 1 is vertically provided with an adjusting hole 1a, the central axis of the adjusting hole 1a is perpendicular to the sliding direction of the inner tube 21, the supporting rod 4 is slidably and adjustably arranged in the adjusting hole 1a, and the lower end of the supporting rod 4 is connected with the foot pad 3 through a ball joint, so that the foot pad 3 can be completely matched with a supporting surface when the telescopic ladder is used in an inclined mode. The locking mechanism 5 is engaged with the strut 4 to lock the foot pad 3.

Referring to fig. 4,5 and 6, specifically, the locking mechanism 5 includes a locking member 51, a driving shaft 52, an operating member 53 and a second elastic member 54. One side of the mounting seat 11 is provided with a containing cavity 11a and a through hole for communicating the adjusting hole 1a and the containing cavity 11a, the driving shaft 52 is pivoted on the mounting seat 11, and the pivot shaft is perpendicular to the central axis of the adjusting hole 1a. The two ends of the driving shaft 52 extend out of the outer tube 22 and are fixedly connected with the operating member 53, and the operating member 53 is a pedal. The locking member 51 is fixed to the driving shaft 52 and is disposed in the accommodating chamber 11 a. The second elastic member provides an elastic force for enabling the locking member 51 to withdraw from the adjusting hole 1a, specifically, the second elastic member 54 is a torsion spring, the torsion spring is sleeved on the driving shaft 52 and is disposed in the accommodating cavity 11a, one end of the torsion spring abuts against the locking member 51, and the other end of the torsion spring abuts against the mounting seat 11. By providing the second elastic member 54, the locking member 51 may be automatically engaged with the strut 4, thereby achieving the self-locking purpose. Under the elastic force drive of the torsion spring, the driving shaft 52 rotates forward to drive the locking piece 51 to extend into the adjusting hole 1a through the through hole so as to be clamped with the supporting rod 4; or the operating member 53 is operated to reversely rotate the driving shaft 52 and drive the locking member 51 to withdraw from the adjusting hole 1a so as to be separated from the supporting rod 4. The locking piece 51 is provided with a clamping tooth 51a, the outer side of the supporting rod 4 is provided with a grain 4a, and when the supporting rod 4 is locked, the clamping tooth 51a is meshed with the grain 4 a. Through setting up locking mechanical system 5, locking piece 51 with branch 4 can block or break away from, thereby can make branch 4 can be fixed in arbitrary height in regulation hole 1a, reaches the purpose of regulation, and only need operate operating piece 53 can the unblock, and is simple to use convenient.

Referring to fig. 2, 3, 7 and 8, the telescopic tube 2 further includes a lock release mechanism 23 disposed in the inner tube 21, the lock release mechanism 23 includes a driving member 231, a base 232, a central shaft 233, four swing arms 234, two locking pins 235 and two connecting shafts 236; the base 232 is fixed on the inner tube 21, the swing arms 234 are in a bent structure, the swing arms 234 are arranged up and down, the upper two swing arms 234 are symmetrically arranged, the lower two swing arms 234 are symmetrically arranged, the upper and lower two swing arms 234 on the same side are correspondingly overlapped, one ends of the upper and lower two swing arms 234 on the same side are connected through a shaft pin 237, the middle parts of the four swing arms 234 are pivoted on the base 232 through a middle shaft 233, and the middle shaft 233 is perpendicular to the sliding direction of the inner tube 21. The locking pin 235 is slidably disposed and can extend out of the inner tube 21, the other ends of the upper and lower swing arms 234 located at the same side are connected with a connecting shaft 236, and the connecting shaft 236 is connected with a locking pin 235; the two sides of the outer tube 22 are provided with locking holes 22a, at least two locking holes 22a are arranged on the same side, and the two locking holes 22a are respectively arranged at two ends of the outer tube 22. The cross section of the driving member 231 is matched with that of the inner tube 21, the driving member 231 is slidably disposed on the inner tube 21 and can abut against one end of the swing arm 234 to drive the swing arm 234 to swing, and the other end of the swing arm 234 can drive the locking pin 235 to insert into or withdraw from the locking hole 22a, so as to achieve mutual locking or unlocking of the inner tube 21 and the outer tube 22. Specifically, the central axis of the locking pin 235 is perpendicular to the central axis 233. The middle part of the connecting shaft 236 is connected with the locking pin 235, the base 232 is provided with a long hole 232a extending along the sliding direction of the locking pin 235, the other end of the swing arm 234 is provided with a driving inclined hole 234a inclined relative to the long hole 232a, the connecting shaft 236 is parallel to the middle shaft 233, and the upper and lower ends of the connecting shaft 236 are respectively and slidably arranged in the driving inclined holes 234a of the upper and lower swing arms 234 and the two long holes 232a on the upper and lower sides of the base 232. By providing the connecting shaft 236 and the driving inclined hole 234a, the swinging force of the swinging arm 234 can be converted into an axial pushing force for driving the locking pin 235 to slide toward the locking hole 22a, thereby locking the inner tube 21 and the outer tube 22 by the locking pin 235.

As shown in fig. 2 and 4, the lock release mechanism 23 further includes a driving rod 238, a U-shaped member 239, and an operation button 240, wherein one end of the driving rod 238 is connected to the driving member 231, the other end is connected to the U-shaped member 239, the U-shaped member 239 is enclosed outside the mounting seat 11, the operation button 240 is connected to the U-shaped member 239, and the operation button 240 is disposed on a side surface of the foot rest 1, so that the driving rod 238 pushes the driving member 231 to slide by pressing. Since the driving member 231 is located in the inner tube 21, the driving rod 238 is provided such that the operation button 240 extends out of the outer tube 22, thereby facilitating the operation of the user and improving the convenience of use. In addition, two sides of the U-shaped member 239 are provided with elongated escape holes 239a for the driving shaft 52 to pass through, so that the U-shaped member 239 does not interfere with the driving shaft 52 when the operation button 240 is operated to drive the U-shaped member 239 to move and push the driving rod 238.

As further shown in fig. 7, the lock release mechanism 23 further includes a first elastic member 241, and the first elastic member 241 provides an elastic force for inserting the locking pin 235 into the locking hole 22 a. The first elastic member 241 may automatically insert the locking pin 235 into the locking hole 22a, thereby automatically locking the inner tube 21 and the outer tube 22. Specifically, the first elastic member 241 is a torsion spring, and the torsion spring is sleeved on the central shaft 233 and abuts against a shaft pin 237 connecting the upper and lower swing arms 234. Therefore, only one torsion spring is required to drive the four swing arms 234 to act.

In addition, referring to fig. 2 again, a sliding groove 21a is formed in the i-shaped recess on the outer side of the inner tube 21, a sliding block 22b is provided on the inner wall of the outer tube 22, and the sliding block 22b is slidably disposed on the sliding groove 21 a. The sliding groove 21a and the sliding block 22b are matched, so that the inner tube 21 can slide more stably and accurately. The inner wall of the outer tube 22 is further provided with a fixing rod 22c extending along the sliding direction of the inner tube 21, the locking hole 22a is formed in the fixing rod 22c, and the fixing rod 22c is fixedly connected with the sliding block 22 b. The fixing rod 22c is provided, and the locking hole 22a is provided on the fixing rod 22c, so that the locking hole 22a is prevented from being opened outside the outer tube 22, and the aesthetic property of the outer tube is improved.

The working principle of the telescopic foot 102 of the ladder according to the present invention is described in detail below with reference to the above drawings and fig. 9, as follows:

When the telescopic leg 102 of the ladder needs to be extended, the operating button 240 is manually pressed, so that the operating button 240 pushes the U-shaped member 239, the U-shaped member 239 slides and pushes the driving rod 238, the driving rod 238 pushes the driving member 231 to slide towards the swinging arm 234, when the driving member 231 presses one end of the swinging arm 234, the four swinging arms 234 rotate around the central shaft 233 and compress the first elastic member 241, so that the upper and lower swinging arms 234 on the same side swing and simultaneously drive the connecting shaft 236 on the same side, and the connecting shaft 236 moves inwards along the direction of the elongated hole 232a under the combined action of the driving inclined hole 234a and the elongated hole 232a and pushes the locking pin 235 to move inwards, so that the locking pin 235 exits the locking hole 22a of the outer tube 22 near the inner end. At this time, the outer tube 22 and the inner tube 21 are unlocked from each other, and the inner tube 21 can be pulled out and the operation button 240 can be released. When the inner tube 21 is completely pulled out, the locking pin 235 is opposite to the locking hole 22a near the outer end of the outer tube 22, at this time, under the elastic restoring force of the first elastic member 241, the swing arm 234 rotates and drives the connecting shaft 236 to move outwards, so as to drive the locking pin 235 to be inserted into the locking hole 22a, and at the same time, one end of the swing arm 234 pushes the driving member 231 reversely, and the driving member 231 drives the operation button 240 to reset through the driving rod 238 and the U-shaped member 239. At this time, the inner tube 21 is in an extended state and is locked with the outer tube 22. When the telescopic leg 102 of the ladder needs to be retracted, the operation button 240 is only needed to be manually pressed, the lock releasing mechanism 23 unlocks the inner tube 21 and the outer tube 22 again, then the inner tube 21 is pushed into the outer tube 22, so that the inner tube 21 is completely placed in the outer tube 22, and finally the lock releasing mechanism 23 automatically locks the inner tube 21 and the outer tube 22 again to complete folding.

When the foot pad 3 is needed to be used, only the operation piece 53 needs to be operated, the operation piece 53 drives the driving shaft 52 to rotate and compress the second elastic piece 54, the driving shaft 52 drives the locking piece 51 to rotate, the lower end of the locking piece 51 is led out of the adjusting hole 1a, at this time, the supporting rod 4 connected with the foot pad 3 can be inserted into the adjusting hole 1a and the height is adjusted, then the operation piece 53 is released, the locking piece 51 rotates again under the restoring force of the second elastic piece 54, the lower end of the locking piece enters the adjusting hole 1a, the clamping teeth 51a are clamped with the lines 4a on the supporting rod 4, and then the supporting rod 4 is locked. At this time, the foot pad 3 can be mounted.

Compared with the prior art, the lock release mechanism 23 is arranged in the inner tube 21, the inner tube 21 and the outer tube 22 slide mutually, the swing arm 234 is arranged on the base 232 by the middle shaft 233, the locking pin 235 is arranged outside the inner tube 21 in a sliding manner and can extend out of the inner tube 21, and the swing arm 234 is driven by the driving piece 231, so that the swing arm 234 swings and drives the locking pin 235 to be inserted into the locking hole 22a of the outer tube 22, and the relative positions of the inner tube 21 and the outer tube 22 are locked, so that the inner tube 21 and the outer tube 22 achieve the locking purpose after being unfolded or contracted; the inner tube 21 and the outer tube 22 can reduce the occupied space after being contracted and locked, and only the driving piece 231 is required to be driven to act when in use, so that the operation is simple and the use is convenient; in addition, by providing the lock release mechanism 23 in the inner tube 21, the exposure thereof can be avoided. Therefore, the entire ladder telescoping foot 102 may extend out of the support ladder when in use, making the ladder more stable, or collapse when not in use, to save space, facilitate storage and portability, and be aesthetically pleasing.

The foregoing disclosure is merely illustrative of the principles of the present invention, and thus, it is intended that the scope of the invention be limited thereto and not by this disclosure, but by the claims appended hereto.

Claims

1. The utility model provides a telescopic tube, includes inner tube and outer tube that cup joints slip each other, its characterized in that: the locking mechanism comprises a driving piece, a seat body, a middle shaft, a swing arm and a locking pin; the seat body is fixed on the inner tube, the middle part of the swing arm is pivoted on the seat body through the center shaft, the locking pin is arranged in a sliding manner and can extend out of the outer side of the inner tube, and the center shaft of the locking pin is perpendicular to the center shaft; the outer tube is provided with a locking hole, the driving piece is arranged on the inner tube in a sliding manner and drives the swing arm to swing, so that the other end of the swing arm drives the locking pin to insert into or withdraw from the locking hole, and the inner tube and the outer tube are locked or unlocked mutually; the lock release mechanism further comprises a connecting shaft, the connecting shaft is connected with the locking pin, the base body is provided with a long hole extending along the sliding direction of the locking pin, the other end of the swing arm is provided with a driving inclined hole inclined relative to the long hole, the connecting shaft is parallel to the central shaft, and the connecting shaft is slidably arranged in the driving inclined hole and the long hole in a penetrating manner; the lock release mechanism further comprises a driving rod and an operation button, one end of the driving rod is connected with the driving piece, and the other end of the driving rod extends out of the outer tube; the operating button is connected to the other end of the driving piece, so that the driving rod pushes the driving piece to slide by pressing.

2. The telescoping tube of claim 1, wherein: the lock release mechanism further comprises a first elastic member which provides an elastic force for inserting the locking pin into the locking hole.

3. The telescoping tube of claim 2, wherein: the first elastic piece is a torsion spring which is sleeved on the middle shaft and abuts against the swing arm.

4. The telescoping tube of claim 1, wherein: the inner wall of the outer tube is provided with a fixing rod extending along the sliding direction of the inner tube, and the locking hole is formed in the fixing rod.

5. The telescoping tube of claim 1, wherein: the outer side of the inner pipe is provided with a sliding groove, the inner wall of the outer pipe is provided with a sliding block, and the sliding block is slidingly arranged on the sliding groove.

6. A ladder telescoping foot, characterized in that: comprising a foot support and the telescopic tube of any one of claims 1 to 5, said foot support being connected to the outer end of said inner tube.

7. A ladder telescoping foot as set forth in claim 6, wherein: the heel brace has the mount pad, the mount pad install in the outer end of inner tube.

8. A ladder telescoping foot as set forth in claim 7, wherein: the ladder telescopic foot further comprises a foot pad and a supporting rod, wherein adjusting holes are vertically formed in the foot support, the supporting rod is slidably and adjustably arranged in the adjusting holes, and the lower end of the supporting rod is connected with the foot pad.

9. A ladder telescoping foot as set forth in claim 8, wherein: the ladder telescopic foot also comprises a locking mechanism, wherein the locking mechanism is clamped with the support rod so as to lock the foot pad.

10. A ladder telescoping foot as set forth in claim 9 wherein: the locking mechanism comprises a locking piece, a driving shaft and an operating piece, wherein one side of the mounting seat is provided with a through hole communicated with the adjusting hole, the driving shaft is pivoted on the mounting seat, a pivoted center shaft is perpendicular to a center shaft of the adjusting hole, two ends of the driving shaft extend out of the outer tube and are connected with the operating piece, the locking piece is fixed on the driving shaft, and the driving shaft can rotate to drive the locking piece to extend into the adjusting hole or withdraw from the adjusting hole through the through hole so as to be clamped with or separated from the supporting rod.

11. A ladder telescoping foot as set forth in claim 10 wherein: the locking mechanism further includes a second resilient member that provides a resilient force that withdraws the locking member from the adjustment aperture.

12. A ladder telescoping foot as set forth in claim 11 wherein: the second elastic piece is a torsion spring, one end of the torsion spring is propped against the locking piece, and the other end of the torsion spring is propped against the mounting seat.

13. A ladder telescoping foot as set forth in claim 10 wherein: the locking piece is provided with clamping teeth, and lines meshed with the clamping teeth are arranged on the outer side of the supporting rod.