FIELD OF THE INVENTION
[0001] The present invention relates to a telescopically extendable and collapsible ladder,
and more particularly to a telescopic pipe buffer structure.
BACKGROUND OF THE INVENTION
[0002] Currently, the existing telescopic ladder includes two adjacent ladder legs and rungs
disposed between the ladder legs. Each of the ladder legs includes a plurality of
nested ladder sections which are able to slide relatively to each other to realize
a telescopic function of the telescopic ladder. Sometimes, it is necessary to fix
a top of the telescopic ladder to a wall or a beam. When in use, the lowermost section
of the telescopic ladder is pulled down, and the lower section of the telescopic ladder
drives the upper section to gradually unfold the entire telescopic ladder downward.
When not in use, the lowermost section of the telescopic ladder is pushed upwards,
so that the upper section is inserted into the lower section to fold the entire telescopic
ladder. However, during the above-mentioned unfolding or folding process, there is
no buffer effect between the adjacent upper section and the lower section. Therefore,
when the lower section slides down relatively to the upper section, under the tension
and gravity, the telescopic ladder is unfolded too fast thereby causing safety problems.
For the existing telescopic ladder hanged on the wall or beam, the buffer effect between
the upper section and the lower section is poor, and there are deficiencies in safety
issues. Therefore, the existing telescopic ladder lacks safety and it is inconvenient
to use.
SUMMARY OF THE INVENTION
[0003] One objective of the present invention is to provide a telescopic pipe buffer structure
with simple structure, good buffer effect and high safety performance.
[0004] To achieve the above-mentioned objective, the present invention provides a telescopic
pipe buffer structure includes an inner tube, an outer tube, a buffer plate, and a
guard plate. The inner tube is slidably sleeved into the outer tube, and the guard
plate is disposed at an end of the inner tube. Furthermore, an accommodating groove
is formed between the guard plate and an end surface of the inner tube, and the buffer
plate is disposed on the guard plate and located on a side of the guard plate close
to the accommodating groove. Furthermore, an edge of the buffer plate is abutted against
an inner wall of the outer tube, so that while the inner tube is inserted into the
outer tube, the edge of the buffer plate is scrolled into the accommodating groove;
and while the outer tube is pushed to make the inner tube extend outwardly from the
outer tube, the buffer plate keeps slidably abutting against the inner wall of the
outer tube to realize a buffer function.
[0005] In comparison with the prior art, a guard plate is provided at one end of the inner
tube, and an accommodating groove is formed between the guard plate and an end surface
of the inner tube, and a buffer plate is disposed on a side of the guard plate close
to the accommodating groove. Furthermore, an edge of the buffer plate abuts against
an inner wall of the outer tube, so that while the telescopic ladder is folded, the
edge of the buffer plate is scrolled upwards into the accommodating groove thereby
reducing friction; and while the telescopic ladder is unfolded, the guard plate blocks
the buffer plate and the buffer plate keeps slidably abutting against the inner wall
of the outer tube to realize a buffer function. The telescopic pipe buffer structure
has a simple structure and good buffer effect, and can prevent the inner tube of the
telescopic ladder from quickly extending outwardly thereby effectively improving safety
performance of the telescopic ladder.
[0006] Preferably, the telescopic pipe buffer structure further includes a guide sleeve
fixed to an end surface of the inner tube. The guide sleeve is arranged to guide the
inner tube while the inner tube slides relatively to the outer tube.
[0007] Preferably, the buffer plate is a silica gel piece. Silicone material is elastic
and deformable and has a large friction coefficient, which can increase a large frictional
force and improve the buffer effect during use.
[0008] Specifically, the accommodating groove is surrounded the inner tube.
[0009] Specifically, the inner tube and the outer tube are triangular tubes.
BRIEF DESCRIPTION OF THE DRAWINGS
[0010]
Fig. 1 is a structure schematic showing a telescopic ladder installed on a beam according
to one embodiment of the present invention;
Fig. 2 is an exploded view of a telescopic pipe buffer structure according to one
embodiment of the present invention;
Fig. 3 is a partial section view of the telescopic pipe buffer structure when the
telescopic ladder is unfold; and
Fig. 4 is a partial section view of the telescopic pipe buffer structure when the
telescopic ladder is fold.
DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENTS
[0011] A distinct and full description of the technical solution of the present invention
will follow by combining with the accompanying drawings.
[0012] Referring to Figs. 2 and 3, the telescopic pipe buffer structure 100 includes an
inner tube 1 and an outer tube 2, and the inner tube 1 is slidably sleeved into the
outer tube 2. Specifically, the inner tube 1 and the outer tube 2 are triangular tubes.
The telescopic pipe buffer structure 100 further includes a buffer plate 3, a guard
plate 4, and a guide sleeve 5. More specifically, the cross sections of the buffer
plate 3, the guard plate 4, and the guide sleeve 5 correspond to the cross section
of the inner tube 1. The guard plate 4 is fixed at an end of the inner tube 1 by screws
7. Furthermore, an accommodating groove 6 surrounding the inner tube 1 is formed between
the guard plate 4 and an end surface of the inner tube 1. Furthermore, a guide sleeve
5 is fixed to the end surface of the inner tube 1 and close to the accommodating groove
6, so both the guide sleeve 5 and the guard plate 4 directly face to the accommodating
groove 6. The guide sleeve 5 is arranged to guide the inner tube 1 while the inner
tube 1 slides relatively to the outer tube 2. Specifically, the buffer plate 3 is
disposed on the guard plate 4 and located at a side of the guard plate 4 close to
the accommodating groove 6. Furthermore, an edge of the buffer plate 3 is abutted
against an inner wall of the outer tube 2, so that while the inner tube 1 is inserted
into the outer tube 2, the edge of the buffer plate 3 is scrolled into the accommodating
groove 6; and while the outer tube 2 is pushed to make the inner tube 1 extend outwardly
from the outer tube 2, the edge of the buffer plate 3 keeps slidably abutting against
the inner wall of the outer tube 2 to realize a buffer function.
[0013] Preferably, the buffer plate 3 is a silica gel piece. Silicone material is elastic
and deformable and has a large friction coefficient, which can increase a large frictional
force and improve the buffer effect during use.
[0014] As shown in Fig. 1 and Fig. 3, an upper end of the telescopic ladder 200 is fixed
to a beam 300, and when the telescopic ladder 200 is unfolded, the lowermost section
of the telescopic ladder 200 firstly extends downwards. Therefore, the outer tube
2 slides downward relative to the inner tube 1, at the beginning of the sliding, the
edge of the buffer plate 3 slides against the inner wall of the outer tube 2 and has
a tendency to deform downwardly as the outer tube 2 slides. However, because the buffer
plate 3 is blocked by the guard plate 4 below, the edge of the buffer plate 3 can
only abut against the inner wall of the outer tube 2 and generate great frictional
resistance. Thus, the buffer plate 3 hinders the outer tube 2 from sliding downward
thereby achieving a buffering effect on the outer tube 2. As shown in Fig. 4, when
the telescopic ladder 200 is folded, the lowermost section of the telescopic ladder
200 is folded upwards. Therefore, the outer tube 2 slides upward relative to the inner
tube 1, at the beginning of the sliding, the edge of the buffer plate 3 slidably abuts
against the inner wall of the outer tube 2 and deforms upward as the outer tube 2
slides. Because the accommodating groove 6 is located above the buffer plate 3, the
edge of the buffer plate 3 will be scrolled upwards into the accommodating groove
6 so as to reduce the frictional resistance. Thus, the outer tube 2 can be nested
to the inner tube 1 quickly and smoothly to achieve fold the telescopic ladder 200.
[0015] In comparison with the prior art, a guard plate 4 is provided at one end of the inner
tube 1, and an accommodating groove 6 is formed between the guard plate 4 and an end
surface of the inner tube 1, and a buffer plate 3 is disposed on a side of the guard
plate 4 close to the accommodating groove 6. Furthermore, an edge of the buffer plate
3 abuts against an inner wall of the outer tube 2, so that while the telescopic ladder
200 is folded, the edge of the buffer plate 3 is scrolled upwards into the accommodating
groove 6 thereby reducing friction. While the telescopic ladder 200 is unfolded, the
guard plate 4 blocks the buffer plate 3 and the buffer plate 3 keeps slidably abutting
against the inner wall of the outer tube 2 to realize a buffer function. The telescopic
pipe buffer structure 100 has a simple structure and good buffer effect, and can prevent
the inner tube 1 of the telescopic ladder 200 from quickly extending outwardly thereby
effectively improving safety performance of the telescopic ladder 200.
[0016] While the invention has been described in connection with what are presently considered
to be the most practical and preferred embodiments, it is to be understood that the
invention is not to be limited to the disclosed embodiments, but on the contrary,
is intended to cover various modifications and equivalent arrangements included within
the spirit and scope of the invention.
1. A telescopic pipe buffer structure, comprising an inner tube, an outer tube, a buffer
plate, and a guard plate, wherein the inner tube is slidably sleeved into the outer
tube, the guard plate is disposed at an end of the inner tube, an accommodating groove
is formed between the guard plate and an end surface of the inner tube, the buffer
plate is disposed on the guard plate and located on a side of the guard plate close
to the accommodating groove, an edge of the buffer plate is abutted against an inner
wall of the outer tube, so that while the inner tube is inserted into the outer tube,
the edge of the buffer plate is scrolled into the accommodating groove; and while
the outer tube is pushed to make the inner tube extend outwardly from the outer tube,
the buffer plate keeps slidably abutting against the inner wall of the outer tube
to realize a buffer function.
2. The telescopic pipe buffer structure according to claim 1, further comprising a guide
sleeve fixed to an end surface of the inner tube.
3. The telescopic pipe buffer structure according to claim 1, wherein the buffer plate
is a silica gel piece.
4. The telescopic pipe buffer structure according to claim 1, wherein the accommodating
groove is surrounded the inner tube.
5. The telescopic pipe buffer structure according to claim 1, wherein the inner tube
and the outer tube are triangular tubes.