CN219622622U - One-key folding telescopic ladder with diagonal brace - Google Patents

Abstract

A key folding telescopic ladder with diagonal bracing comprises a telescopic ladder body, wherein the telescopic ladder body comprises two ladder bodies, each ladder body comprises two ladder rods and a plurality of pedals arranged between the two ladder rods, a first rotating seat and a second rotating seat are fixed on each ladder rod, a hanging rod is connected to the first rotating seat through a pin shaft in a rotating mode, a plurality of openings are formed in the bottom end of each hanging rod, the diagonal bracing is connected to the second rotating seat through a pin shaft in a rotating mode, the diagonal bracing comprises an inner rod and an outer tube, the top end of the inner rod is connected with the second rotating seat through a pin shaft in a rotating mode, the bottom end of the inner rod is inserted into the outer tube in a sliding mode, clamping rods used for penetrating through the openings and clamping the hanging rods are fixed on the outer side wall of the outer tube, and a fixing structure used for fixing the length of the diagonal bracing is arranged between the outer tube and the inner rod. The inclined stay bar can be rotated and folded, so that space occupation is reduced, and meanwhile, the inclined stay bar can be contracted, so that the inclined stay bar can be always contacted with the ground.

Description

One-key folding telescopic ladder with diagonal brace

Technical Field

The utility model relates to the technical field of extension ladders, in particular to a one-key folding extension ladder with inclined stay bars.

Background

The applicant has previously proposed an utility model patent entitled "novel telescopic ladder" to the national patent office, the application number of which is "2022205756689". The utility model mainly solves the problem that in the prior art, when the ladder is folded, an operator is required to bend down to press the button at the bottom end of the lowest-stage pedal. The folding process is inconvenient. The utility model drives the linkage rod to move downwards by stepping on the connecting rod. The linkage rod drives the knob to rotate, so that the locking mechanism is unlocked, and the telescopic ladder is contracted. The button at the bottom end of the pedal at the lowest stage is not required to be bent down by a worker. The telescopic ladder is more rapid and convenient to retract.

However, the applicant found that, in the actual use, since diagonal braces are not provided on both sides of the ladder bars, the telescopic ladder body sometimes appears to shake during use. In the prior art, a plurality of telescopic ladders are used for fixing inclined supporting rods on two sides of a ladder rod so as to improve the stability of the ladder in use. The applicant finds that after fixing the diagonal braces on two sides of the ladder bar according to the prior art, the diagonal braces additionally occupy a large amount of space when the telescopic ladder body is in a contracted state, and the unfolding angle of the diagonal braces is fixed and cannot be adjusted according to the ground condition, so that the diagonal braces cannot be supported to the ground sometimes.

Therefore, the utility model provides a technical scheme for solving the problems that when the telescopic ladder body is in a contracted state, the inclined stay rod additionally occupies a large amount of space and cannot be adjusted according to the ground condition.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a one-key folding telescopic ladder with diagonal braces, which aims to achieve the technical effects that the diagonal braces can be rotated and folded, so that space occupation is reduced, and meanwhile, the diagonal braces can be contracted, and the diagonal braces can be always contacted with the ground.

A key folding telescopic ladder with diagonal bracing, includes the telescopic ladder body, the telescopic ladder body includes two ladder bodies, the ladder body includes two ladder poles and a plurality of footboard that set up between two ladder poles, be fixed with first roating seat and second roating seat on the ladder pole, be connected with the peg through the round pin axle rotation on the first roating seat, a plurality of openings have been seted up to the bottom of peg, be connected with the diagonal bracing through the round pin axle rotation on the second roating seat, the diagonal bracing includes interior pole and outer tube, the top and the second roating seat of interior pole are through round pin axle swivelling joint, in the bottom of interior pole inserts the outer tube with sliding connection's mode, be fixed with the card pole that is used for passing the opening and block the peg on the lateral wall of outer tube, be provided with the fixed knot structure that is used for fixed diagonal bracing length between outer tube and the interior pole.

Through adopting above-mentioned technical scheme, set up the diagonal brace in the both sides of ladder pole, can promote the stability of extension ladder body when using. The diagonal brace can rotate around the second rotating seat, the diagonal brace can retract, the diagonal brace is retracted to the shortest state, the diagonal brace is rotated to the ladder rod until the diagonal brace is attached to the ladder rod, and when the telescopic ladder body is in the retracted state, the space occupied by the diagonal brace is very small. The diagonal brace can rotate, so that the angle between the diagonal brace and the ladder rod can be adjusted, the diagonal brace can stretch and contract, the diagonal brace can be guaranteed to be always in contact with the ground, and the position of the diagonal brace can be finely adjusted, so that the diagonal brace avoids a pothole on the ground. After the position of the diagonal brace is adjusted, the hanging rod is hung on the clamping rod through the notch, a triangle is formed among the diagonal brace, the hanging rod and the ladder rod, and the stability of the diagonal brace is improved by utilizing the stability of the triangle. The inclined stay bar can be rotated and folded, so that space occupation is reduced, and meanwhile, the inclined stay bar can be contracted, so that the inclined stay bar can be always contacted with the ground.

The utility model is further provided with: the connecting line between the circle centers of the two ladder bars and the straight line where the diagonal brace is positioned form an included angle of 45 degrees.

Through adopting above-mentioned technical scheme, be different from among the prior art diagonal brace and two ladder poles and be located the coplanar, the diagonal brace inclines to between two ladder bodies, can further promote the stability of extension ladder body when using.

The utility model is further provided with: and a foot pad is fixed at the bottom end of the outer tube.

Through adopting above-mentioned technical scheme, the frictional force between outer tube and the ground has been increased in the setting of callus on the sole to further promote the stability of diagonal brace.

The utility model is further provided with: the fixed knot constructs including spout, slider and a plurality of through-hole, a plurality of the through-hole all is seted up on the lateral wall of outer tube and communicates with each other with the inside of outer tube, a plurality of the through-hole corresponds a plurality of openings respectively, the spout is seted up on the lateral wall of interior pole and corresponds with the position of through-hole, slider sliding connection is in the spout, fixedly connected with first spring between the tank bottom of one end of slider and spout, the other end of slider wears out the spout and passes the through-hole and set up to the arc.

Through adopting above-mentioned technical scheme, when needs shrink diagonal brace, press the slider, the slider moves in the spout along the through-hole, and first spring is compressed and is formed the rebound force outward towards the spout. When the sliding block is retracted into the sliding groove, the outer pipe is moved, so that through holes at different positions on the outer pipe correspond to the sliding groove, and when the sliding groove corresponds to the through holes, the sliding block passes through the through holes again under the action of the rebound force of the first spring, so that the inner rod is fixed in the outer pipe, and the diagonal brace is fixed at the current length. And each through hole corresponds to each opening respectively, when the diagonal brace with the length is rotated to be in contact with the ground, after the diagonal brace is rotated, one opening on the diagonal brace just corresponds to the clamping rod, so that the rotated diagonal brace can be clamped on the clamping rod.

The utility model is further provided with: the fixed knot constructs including installation piece and a plurality of connecting hole, a plurality of the connecting hole all is seted up on the lateral wall of interior pole, a plurality of the connecting hole corresponds a plurality of openings respectively, the installation piece is fixed in on the lateral wall of outer tube, the cavity has been seted up to the inside of installation piece, sliding connection has the sliding plate in the cavity, one side that is close to the outer tube on the sliding plate is fixed with the connecting rod, the other end of connecting rod passes installation piece and outer tube in proper order with sliding connection's mode and inserts in the connecting hole, one side that deviates from the outer tube on the sliding plate is fixed with the pull rod, the other end of pull rod wears out the cavity and is located the outside of installation piece with sliding connection's mode, fixedly connected with cover is located the outside second spring of pull rod between the cavity wall of sliding plate and cavity.

Through adopting above-mentioned technical scheme, when needs shrink diagonal brace, the pulling rod drives the sliding plate and removes along the cavity dorsad connecting hole, the sliding plate drives the connecting rod and withdraws from the connecting hole in and retract the cavity, the second spring is pressed and is formed the resilience force towards the cavity. And moving the outer tube to enable the connecting holes at different positions on the inner rod to correspond to the connecting rods, when the connecting holes correspond to the connecting rods, loosening the pull rods, and moving and resetting the sliding plates under the action of the rebound force of the second springs so as to drive the pull rods and the connecting rods to move and reset, and reinserting the connecting rods into the connecting holes, so that the inner rods are fixed in the outer tube, and the diagonal bracing rods are fixed at the current length. And each connecting hole corresponds to each opening respectively, when the diagonal brace with the length is rotated to be in contact with the ground, after the diagonal brace is rotated, one opening on the diagonal brace just corresponds to the clamping rod, so that the rotated diagonal brace can be clamped on the clamping rod.

The utility model is further provided with: one end of the pull rod penetrating out of the cavity is fixed with a pull ring.

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

The utility model is further provided with: the outer side wall of the inner rod is provided with a plurality of scale marks, and the scale marks correspond to the connecting holes respectively.

Through adopting above-mentioned technical scheme, when the top of outer tube and scale mark overlap, the connecting rod just corresponds with the connecting hole, and the setting of scale mark can be convenient for the staff judge whether the connecting rod corresponds with the connecting hole.

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

a key-folding telescopic ladder with diagonal braces is provided with diagonal braces on two sides of a ladder rod, so that stability of a telescopic ladder body in use can be improved. The diagonal brace can rotate around the second rotating seat, the diagonal brace can retract, the diagonal brace is retracted to the shortest state, the diagonal brace is rotated to the ladder rod until the diagonal brace is attached to the ladder rod, and when the telescopic ladder body is in the retracted state, the space occupied by the diagonal brace is very small. The diagonal brace can rotate, so that the angle between the diagonal brace and the ladder rod can be adjusted, the diagonal brace can stretch and contract, the diagonal brace can be guaranteed to be always in contact with the ground, and the position of the diagonal brace can be finely adjusted, so that the diagonal brace avoids a pothole on the ground. After the position of the diagonal brace is adjusted, the hanging rod is hung on the clamping rod through the notch, a triangle is formed among the diagonal brace, the hanging rod and the ladder rod, and the stability of the diagonal brace is improved by utilizing the stability of the triangle. The inclined stay bar can be rotated and folded, so that space occupation is reduced, and meanwhile, the inclined stay bar can be contracted, so that the inclined stay bar can be always contacted with the ground.

Drawings

FIG. 1 is a schematic diagram of a first embodiment;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view at B in FIG. 1;

FIG. 4 is a partial cross-sectional view of the inner rod and outer tube of the first embodiment;

FIG. 5 is a schematic diagram of a second embodiment;

FIG. 6 is an enlarged view at C in FIG. 5;

fig. 7 is a partial cross-sectional view of the inner rod and outer tube of the second embodiment.

Reference numerals: 1. a ladder bar; 2. a pedal; 3. a first rotary base; 4. a second rotating seat; 5. a hanging rod; 6. a notch; 7. a diagonal brace; 8. an inner rod; 9. an outer tube; 10. a clamping rod; 11. a chute; 12. a slide block; 13. a through hole; 14. a first spring; 15. foot pads; 16. a mounting block; 17. a connection hole; 18. a cavity; 19. a sliding plate; 20. a connecting rod; 21. a pull rod; 22. a pull ring; 23. a second spring; 24. graduation marks.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Embodiment one:

as shown in fig. 1-4, a one-key folding telescopic ladder with diagonal braces includes a telescopic ladder body. The telescopic ladder body comprises two ladder bodies. The ladder body comprises two ladder bars 1 and a plurality of pedals 2 arranged between the two ladder bars 1.

A first rotating seat 3 and a second rotating seat 4 are fixed on the ladder bar 1.

The first rotating seat 3 is rotatably connected with a hanging rod 5 through a pin shaft. A plurality of openings 6 are arranged at the bottom end of the hanging rod 5.

The second rotating seat 4 is rotatably connected with an inclined stay bar 7 through a pin shaft. The diagonal strut 7 comprises an inner strut 8 and an outer tube 9. The top end of the inner rod 8 is rotationally connected with the second rotating seat 4 through a pin shaft. The bottom end of the inner rod 8 is inserted into the outer tube 9 in a sliding connection. A clamping rod 10 which is used for penetrating through the notch 6 and clamping the hanging rod 5 is fixed on the outer side wall of the outer tube 9. A fixing structure for fixing the length of the diagonal brace 7 is arranged between the outer tube 9 and the inner rod 8.

The fixed structure comprises a chute 11, a slide block 12 and a plurality of through holes 13. The through holes 13 are all arranged on the outer side wall of the outer tube 9 and are communicated with the inside of the outer tube 9. The through holes 13 respectively correspond to the openings 6. The chute 11 is opened on the outer side wall of the inner rod 8 and corresponds to the position of the through hole 13. The sliding block 12 is slidably connected in the sliding groove 11, a first spring 14 is fixedly connected between one end of the sliding block 12 and the bottom of the sliding groove 11, and the other end of the sliding block 12 penetrates out of the sliding groove 11 and through the through hole 13 and is arc-shaped.

The connecting line between the circle centers of the two ladder bars 1 forms an included angle of 45 degrees with the straight line where the diagonal brace 7 is positioned. The inclined stay bar 7 is located on the same plane with the two ladder bars 1 in the prior art, and the inclined stay bar 7 inclines between the two ladder bodies, so that the stability of the telescopic ladder bodies in use can be further improved.

The bottom end of the outer tube 9 is fixed with a foot pad 15. The provision of the foot pads 15 increases the friction between the outer tube 9 and the ground, thereby further improving the stability of the diagonal strut 7.

Working principle: when the telescopic ladder body is required to be used, the telescopic ladder body is unfolded and moved to the appointed ground. And then the inclined stay bar 7 is rotated and stretched according to the depression condition of the ground, so that the bottom end of the inclined stay bar 7 avoids the depression of the ground, and the bottom end of the inclined stay bar 7 is contacted with the flat position of the ground. Moreover, each through hole 13 corresponds to each notch 6, and when the diagonal brace 7 rotates to be in contact with the ground after the length is adjusted each time, the hanging rod 5 rotates, and one notch 6 just corresponds to the clamping rod 10 on the hanging rod 5, so that the hanging rod 5 after rotation can be clamped on the clamping rod 10. Triangle is formed among the diagonal brace 7, the hanging rod 5 and the ladder rod 1, and the stability of the diagonal brace 7 is improved by utilizing the stability of the triangle. Namely, in the embodiment, the adjustable length of the diagonal brace 7 can be respectively divided into a plurality of steps, and the adjustable angle of the diagonal brace 7 can be also divided into a plurality of steps through the hanging rod 5. Each gear length corresponds to each gear angle respectively, so that the bottom end of the diagonal brace 7 is always at the same height with the bottom end of the ladder bar 1. For example, when the length and the angle of the diagonal brace 7 are adjusted to the highest level during specific use, the bottom end of the diagonal brace 7 just corresponds to a depression on the ground, and at this time, the diagonal brace 7 cannot contact with the ground, and thus cannot play a supporting role. The length and the angle of the diagonal brace 7 can be adjusted by one step, so that the bottom end of the diagonal brace 7 avoids the pits on the ground and contacts with the flat ground.

The contraction process of the diagonal brace 7 is as follows: the slider 12 is pressed, and the slider 12 moves along the through hole 13 into the chute 11, and the first spring 14 is compressed to generate a rebound force toward the outside of the chute 11. When the slide block 12 is retracted into the slide groove 11, the outer tube 9 is moved so that the through holes 13 at different positions on the outer tube 9 correspond to the slide groove 11, and when the slide groove 11 corresponds to the through holes 13, the slide block 12 passes through the through holes 13 again under the action of the rebound force of the first spring 14, so that the inner rod 8 is fixed in the outer tube 9, and the diagonal brace 7 is fixed at the current length.

Embodiment two:

the difference from the first embodiment is that the fixing structure no longer comprises a chute 11, a slider 12 and a number of through holes 13. But, as shown in fig. 5-7, includes a mounting block 16 and a plurality of attachment holes 17. A plurality of connecting holes 17 are all arranged on the outer side wall of the inner rod 8. The plurality of connecting holes 17 respectively correspond to the plurality of openings 6. The mounting block 16 is fixed to the outer side wall of the outer tube 9 and corresponds to the position of the connection hole 17. The interior of the mounting block 16 defines a cavity 18. A slide plate 19 is slidably connected to the cavity 18. A connecting rod 20 is fixed to the sliding plate 19 on the side close to the outer tube 9. The other end of the connecting rod 20 passes through the mounting block 16 and the outer tube 9 in turn in a sliding connection and is inserted into the connecting hole 17. A pull rod 21 is fixed to the side of the slide plate 19 facing away from the outer tube 9. The other end of the pull rod 21 passes out of the cavity 18 in a sliding connection and is located outside the mounting block 16 and is secured with a pull ring 22. A second spring 23 sleeved outside the pull rod 21 is fixedly connected between the sliding plate 19 and the cavity wall of the cavity 18. The outer side wall of the inner rod 8 is provided with a plurality of scale marks 24, and the scale marks 24 respectively correspond to the connecting holes 17.

Working principle: when the diagonal brace 7 needs to be contracted, the pull rod 21 is pulled through the pull ring 22, and the pull ring 22 is arranged, so that a worker can pull the pull rod 21 more conveniently. The pull rod 21 drives the sliding plate 19 to move along the cavity 18 back to the connecting hole 17, the sliding plate 19 drives the connecting rod 20 to be pulled out of the connecting hole 17 and retract into the cavity 18, and the second spring 23 is pressed to form a reactive force towards the cavity 18. The outer tube 9 is moved so that the connecting holes 17 at different positions on the inner rod 8 correspond to the connecting rods 20. When the top end of the outer tube 9 overlaps with the scale mark 24, the connecting rod 20 just corresponds to the connecting hole 17, and the setting of the scale mark 24 can be convenient for a worker to judge whether the connecting rod 20 corresponds to the connecting hole 17. When the connecting hole 17 corresponds to the connecting rod 20, the pull rod 21 is loosened, the sliding plate 19 moves and resets under the action of the rebound force of the second spring 23, so that the pull rod 21 and the connecting rod 20 are driven to move and reset, the connecting rod 20 is reinserted into the connecting hole 17, so that the inner rod 8 is fixed in the outer tube 9, and the diagonal brace 7 is fixed at the current length. And each connecting hole 17 corresponds to each notch 6 respectively, when the diagonal brace 7 with the length is rotated to be in contact with the ground, after the hanging rod 5 is rotated, one notch 6 on the hanging rod 5 just corresponds to the clamping rod 10, so that the rotated scraping rod can be clamped on the clamping rod 10.

In summary, the inclined stay bars 7 are provided on both sides of the ladder bar 1, so that the stability of the telescopic ladder body in use can be improved. The diagonal brace 7 can rotate around the second rotating seat 4, and the diagonal brace 7 can retract by itself, so that the diagonal brace 7 is retracted to the shortest state, and the diagonal brace 7 is rotated to the ladder bar 1 until the diagonal brace 7 is attached to the ladder bar 1, and when the telescopic ladder body is in the retracted state, the space occupied by the diagonal brace 7 is very small. The diagonal brace 7 can rotate, so that the angle between the diagonal brace 7 and the ladder bar 1 can be adjusted, the diagonal brace 7 can stretch and retract, and the diagonal brace 7 can be guaranteed to be always in contact with the ground, so that the position of the diagonal brace 7 can be finely adjusted, and the diagonal brace 7 can avoid a hollow on the ground. After the position of the diagonal brace 7 is adjusted, the hanging rod 5 is hung on the clamping rod 10 through the notch 6. The diagonal brace 7 can be rotated and folded, so that space occupation is reduced, and meanwhile, the diagonal brace 7 can be contracted, so that the diagonal brace 7 can be always contacted with the ground.

In the description of the present utility model, it should be noted that the positional or positional relationship indicated by the terms such as "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "configured to," "engaged with," "connected to," and the like are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill 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 utility model may be embodied in other specific forms without departing from the spirit or essential characteristics 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 disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.

Claims (7)

1. The utility model provides a key folding extension ladder with diagonal brace, includes the extension ladder body, the extension ladder body includes two ladder bodies, the ladder body includes two ladder poles (1) and a plurality of footboard (2) that set up between two ladder poles (1), its characterized in that: be fixed with first roating seat (3) and second roating seat (4) on ladder bar (1), be connected with peg (5) through the round pin axle rotation on first roating seat (3), a plurality of openings (6) have been seted up to peg (5)'s bottom, be connected with diagonal bracing (7) through the round pin axle rotation on second roating seat (4), diagonal bracing (7) include interior pole (8) and outer tube (9), the top and the second roating seat (4) of interior pole (8) are through the round pin axle rotation connection, in the mode of sliding connection inserts outer tube (9) of the bottom of interior pole (8), be fixed with on the lateral wall of outer tube (9) and be used for passing opening (6) and block peg (10) of peg (5), be provided with the fixed knot structure that is used for fixed diagonal bracing (7) length between outer tube (9) and interior pole (8).

2. A push-to-talk telescopic ladder with diagonal braces according to claim 1, wherein: the connecting line between the circle centers of the two ladder bars (1) and the straight line where the diagonal brace (7) is located form an included angle of 45 degrees.

3. A push-to-talk telescopic ladder with diagonal braces according to claim 2, wherein: a foot pad (15) is fixed at the bottom end of the outer tube (9).

4. A one-key collapsible ladder with diagonal braces according to claim 3, wherein: the fixed knot constructs including spout (11), slider (12) and a plurality of through-hole (13), a plurality of through-hole (13) all set up on the lateral wall of outer tube (9) and communicate with each other with the inside of outer tube (9), a plurality of through-hole (13) correspond a plurality of opening (6) respectively, spout (11) set up on the lateral wall of interior pole (8) and correspond with the position of through-hole (13), slider (12) sliding connection is in spout (11), fixedly connected with first spring (14) between the tank bottom of one end of slider (12) and spout (11), the other end of slider (12) wears out spout (11) and passes through-hole (13) and set up to the arc.

5. A one-key collapsible ladder with diagonal braces according to claim 3, wherein: the utility model provides a fixed knot constructs including installation piece (16) and a plurality of connecting hole (17), a plurality of connecting hole (17) all offer on the lateral wall of interior pole (8), a plurality of connecting hole (17) correspond a plurality of opening (6) respectively, on the lateral wall of outer tube (9) was fixed in to installation piece (16), cavity (18) have been offered to the inside of installation piece (16), sliding connection has sliding plate (19) in cavity (18), one side that is close to outer tube (9) on sliding plate (19) is fixed with connecting rod (20), the other end of connecting rod (20) passes installation piece (16) and outer tube (9) in proper order with sliding connection's mode and inserts in connecting hole (17), one side that deviates from outer tube (9) on sliding plate (19) is fixed with pull rod (21), the other end of pull rod (21) wears out cavity (18) and is located the outside of installation piece (16) with sliding connection's mode, sliding plate (19) and cavity wall between fixedly connected with cover locates outside spring (23).

6. A push-to-talk telescopic ladder with diagonal braces according to claim 5, wherein: one end of the pull rod (21) penetrating out of the cavity (18) is fixed with a pull ring (22).

7. A push-to-talk telescopic ladder with diagonal braces according to claim 5, wherein: the outer side wall of the inner rod (8) is provided with a plurality of scale marks (24), and the scale marks (24) respectively correspond to the connecting holes (17).