CN220001029U - Telescopic mechanism and telescopic crutch - Google Patents

Abstract

The utility model discloses a telescopic mechanism and a telescopic crutch, wherein the telescopic mechanism comprises a first pipe fitting, a second pipe fitting and an unlocking piece, the second pipe fitting is slidably inserted into one end of the first pipe fitting, at least one group of locking structures are arranged between the first pipe fitting and the second pipe fitting, each group of locking structures comprises a first clamping hole and an elastic top bead, one of the first clamping hole and the elastic top bead is arranged on the first pipe fitting, and the other is arranged on the second pipe fitting; the unlocking piece is movably arranged on the outer wall of one end of the first pipe fitting, is provided with a first position and a second position and can be switched between the first position and the second position; the clamping part of the elastic propping bead can be inserted into the first clamping hole and locks the second pipe fitting in the first pipe fitting, and when the unlocking piece is switched from the first position to the second position, the unlocking piece can enable the clamping part of the elastic propping bead in the first clamping hole to be separated from the first clamping hole. The telescopic mechanism provided by the utility model can enable the crutch to be more convenient to retract.

Description

Telescopic mechanism and telescopic crutch

Technical Field

The utility model relates to the technical field of crutches, in particular to a telescopic mechanism and a telescopic crutch.

Background

The utility model provides a telescopic walking stick, it is current, it is general including two above pipe fitting, in two adjacent pipe fittings, wherein one pipe fitting installs elasticity top pearl and slidable ground inserts and locates another pipe fitting, first joint hole has been seted up to another pipe fitting, elasticity top pearl generally includes joint portion and sets up the guide part at the tip of joint portion, when elasticity top pearl wears to locate first joint hole, joint portion and the lateral wall joint of first joint hole are in the same place, the guide part is located the pipe fitting outside, thereby make two adjacent pipe fittings lock together, and elasticity top pearl can not automatic retract, avoid the walking stick to shrink by accident in the use. When the length of the existing telescopic crutch is required to be shortened, a user needs to press the elastic top bead by hand so as to enable the elastic top bead to keep a retracted state, and meanwhile, the relative movement of two adjacent pipe fittings is shortened by exerting force, so that the operation is inconvenient.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides a telescopic mechanism convenient to retract.

The utility model also provides a telescopic crutch with the telescopic mechanism.

According to an embodiment of the first aspect of the utility model, the telescopic mechanism comprises a first pipe fitting, a second pipe fitting and an unlocking piece, wherein the second pipe fitting is slidably inserted into one end of the first pipe fitting, at least one group of locking structures are arranged between the first pipe fitting and the second pipe fitting, each group of locking structures comprises a first clamping hole and an elastic top bead, one of the first clamping hole and the elastic top bead is arranged on the first pipe fitting, the other is arranged on the second pipe fitting, and the elastic top bead comprises a clamping part for being matched and clamped with the first clamping hole; the unlocking piece is movably arranged on the outer wall of one end of the first pipe fitting, and is provided with a first position and a second position and can be switched between the first position and the second position; the elastic jacking bead clamping part can be inserted into the first clamping hole and lock the second pipe fitting in the first pipe fitting, and when the unlocking piece is switched from the first position to the second position, the unlocking piece can enable the clamping part of the elastic jacking bead in the first clamping hole to be separated from the first clamping hole.

The telescopic mechanism provided by the embodiment of the utility model has at least the following beneficial effects: when the telescopic mechanism provided by the utility model needs to be contracted, the unlocking piece can be firstly switched from the first position to the second position, in the process, the unlocking piece can retract the elastic top beads in the first clamping holes, so that the clamping parts of the elastic top beads are separated from the first clamping holes, the locking of the second pipe fitting is released, then the first pipe fitting and the second pipe fitting can be relatively moved and contracted, and the telescopic mechanism is contracted, so that the telescopic mechanism does not need to press the elastic top beads by a hand and relatively move the two adjacent pipe fittings by force in the shortening process, and the telescopic mechanism is more convenient to contract.

According to some embodiments of the utility model, in each set of the locking structures, one first clamping hole is arranged on the first pipe fitting, and the elastic top beads are arranged on the second pipe fitting, and the two or more elastic top beads are arranged along the length direction of the second pipe fitting; or, in each group of locking structures, the elastic top bead is provided with one elastic top bead and is installed on the first pipe fitting, the first clamping holes are provided with more than two elastic top beads and are arranged on the second pipe fitting, and more than two elastic top beads are arranged on the second pipe fitting along the length direction of the second pipe fitting.

According to some embodiments of the utility model, the first clamping hole is formed in the first pipe, the elastic top bead is formed in the second pipe, the unlocking piece is provided with an accommodating space, when the unlocking piece is in the first position, the accommodating space is opposite to the first clamping hole, the elastic top bead can be inserted into the first clamping hole and the accommodating space, and when the unlocking piece is switched from the first position to the second position, the accommodating space is far away from the first clamping hole.

According to some embodiments of the utility model, the elastic top bead further comprises a guide portion disposed at an end portion of the clamping portion, the unlocking piece is provided with a pushing portion, and when the unlocking piece is located at the second position, the pushing portion can be inserted into the first clamping hole and abutted against the guide portion.

According to some embodiments of the utility model, the unlocking piece is annular, the unlocking piece is rotatably sleeved at one end of the first pipe fitting, and the second pipe fitting penetrates through the unlocking piece.

According to some embodiments of the utility model, the inner wall of the unlocking piece is provided with a guide groove, the guide groove is communicated with the accommodating space, and when the unlocking piece is switched from the first position to the second position, the elastic top bead in the first clamping hole enters the guide groove and is pushed to retract by the bottom wall of the guide groove.

According to some embodiments of the utility model, a limiting structure for limiting the rotation range of the unlocking piece is arranged between the unlocking piece and the first pipe fitting.

According to some embodiments of the utility model, the limiting structure comprises a limiting block and a limiting piece, the limiting piece is detachably mounted at one end of the first pipe fitting, the limiting piece and the first pipe fitting are enclosed to form a limiting groove, the limiting groove is arranged along the circumferential direction of the first pipe fitting, the limiting block is arranged on the inner wall of the unlocking piece, and the limiting block is inserted into the limiting groove and can move along the limiting groove.

According to some embodiments of the utility model, the limiting piece comprises an annular portion, one end of the annular portion is provided with an abutting portion and an elastic connecting portion, the elastic connecting portion is clamped with the first pipe fitting, the abutting portion abuts against the first pipe fitting, the annular portion and the first pipe fitting are enclosed to form the limiting groove, and the second pipe fitting penetrates through the annular portion.

According to some embodiments of the utility model, the elastic connection part is inserted into the first pipe, the first pipe is provided with a second clamping hole, the elastic connection part is provided with a clamping block, the clamping block is clamped in the second clamping hole, the accommodating space is a through hole, and when the unlocking piece is in the second position, the accommodating space is opposite to the second clamping hole.

According to a second aspect of the utility model, a crutch comprises the telescopic mechanism.

The telescopic crutch provided by the embodiment of the utility model has at least the following beneficial effects: through adopting foretell telescopic machanism, the walking stick is when needs shrink, can switch the unlatching piece from first position to the second position earlier, this in-process unlatching piece can make the interior elasticity top pearl of first joint hole retract for the joint portion of elasticity top pearl breaks away from first joint hole, thereby release the locking to the second pipe fitting, then just can make first pipe fitting and second pipe fitting relative movement shrink, thereby realize the walking stick shrink, so, the walking stick need not the user and makes two adjacent pipe fittings relative movement with hand pressing elasticity top pearl while forcing in shrink process, make things convenient for the walking stick shrink.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of a telescopic mechanism according to an embodiment of the present utility model;

FIG. 2 is an exploded view of the telescoping mechanism shown in FIG. 1;

FIG. 3 is a schematic view of an unlocking member of the telescoping mechanism shown in FIG. 1;

FIG. 4 is a schematic view of the telescoping mechanism of FIG. 1 with a first tube fitting and a stop fitting engaged with each other;

FIG. 5 is a cross-sectional view of a telescoping mechanism (with the unlocking member in the first position) according to an embodiment of the present utility model;

FIG. 6 is a cross-sectional view of a telescoping mechanism (with the unlocking member in the second position) according to an embodiment of the present utility model;

FIG. 7 is a schematic view of a telescoping crutch according to an embodiment of the present utility model.

Reference numerals:

the first pipe fitting 110, the first clamping hole 111, the second clamping hole 112, the guide groove 113, the limiting piece 120, the annular portion 121, the abutting portion 122, the elastic connecting portion 123, the clamping block 124, the guide surface 125, the first protrusion 126, the limiting groove 130, the second pipe fitting 200, the guide block 210, the elastic top bead 300, the clamping portion 310, the guide portion 320, the elastic portion 330, the unlocking piece 400, the accommodating space 410, the guide groove 420, the limiting piece 430, the pushing portion 440 and the clamping groove 450.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1, 2, 5 and 6, the telescopic mechanism provided by the embodiment of the utility model includes a first pipe 110, a second pipe 200 and an unlocking member 400, the second pipe 200 is slidably inserted into one end of the first pipe 110, at least one set of locking structures is disposed between the first pipe 110 and the second pipe 200, each set of locking structures includes a first clamping hole 111 and an elastic top bead 300, one of the first clamping hole 111 and the elastic top bead 300 is disposed on the first pipe 110, the other is disposed on the second pipe 200, and the elastic top bead 300 includes a clamping portion 310 for being matched and clamped with the first clamping hole 111; the unlocking piece 400 is movably installed on the outer wall of one end of the first pipe fitting 110, and the unlocking piece 400 is provided with a first position and a second position and can be switched between the first position and the second position; the locking portion 310 of the elastic top bead 300 can be inserted into the first locking hole 111 and lock the second pipe 200 to the first pipe 110, and when the unlocking member 400 is switched from the first position to the second position, the unlocking member 400 can disengage the locking portion 310 of the elastic top bead 300 in the first locking hole 111 from the first locking hole 111.

Referring to fig. 5, the elastic top bead 300 is a structure commonly used in the art, and the elastic top bead 300 generally further includes an elastic portion 330 connected to the clamping portion 310, where the elastic portion 330 may be a spring, a shrapnel, and the like, and the end of the clamping portion 310 may further be provided with a guiding portion 320, where the guiding portion 320 is a rounded structure or a chamfer structure, so that the elastic top bead 300 is easier to be inserted into the first clamping hole 111 or separated from the first clamping hole 111.

When the telescopic mechanism needs to be contracted, the unlocking piece 400 can be firstly switched from the first position to the second position, in the process, the unlocking piece 400 can enable the elastic top bead 300 in the first clamping hole 111 to retract, the clamping part 310 of the elastic top bead 300 is separated from the first clamping hole 111, so that the locking of the second pipe fitting 200 is released, then the first pipe fitting 110 and the second pipe fitting 200 can be relatively moved to be contracted, the telescopic mechanism is contracted, and in the shortening process, a user does not need to press the elastic top bead 300 by hand and forcefully enable two adjacent pipe fittings to relatively move, and the telescopic mechanism is more convenient to contract.

It is conceivable that in some embodiments, one first clamping hole 111 and one elastic top bead 300 of each set of locking structures are provided, at this time, the telescopic mechanism has a longest extended state and a shortest contracted state, and when the telescopic mechanism is in the longest extended state, the elastic top bead 300 is inserted into the corresponding first clamping hole 111 to lock the second pipe 200 to the first pipe 110; when the telescopic mechanism needs to be stored, the telescopic mechanism can be switched to a contracted state so as to be stored.

Referring to fig. 1, it is conceivable that in some embodiments, in each set of locking structures, one first clamping hole 111 is provided and is disposed on the first pipe 110, two or more elastic top beads 300 are provided and are disposed on the second pipe 200, the two or more elastic top beads 300 are arranged along the length direction of the second pipe 200, when the unlocking member 400 is in the first position, any one elastic top bead 300 can be inserted into the first clamping hole 111, so that the telescopic mechanism can also perform length adjustment except for having an extended state and a contracted state with the shortest length, during the length adjustment of the telescopic mechanism, firstly, the unlocking member 400 is switched from the first position to the second position, then the telescopic mechanism is telescopic, during the process, all the elastic top beads 300 cannot be extended and inserted into the first clamping hole 111, after the telescopic mechanism is telescopic to a required length, the unlocking member 400 is switched from the second position to the first position, then the corresponding elastic top beads 300 are inserted into the first clamping hole 111 to lock the second pipe 200 again to the first pipe 110.

It is conceivable that in some embodiments, in each set of locking structures, the elastic top bead 300 is provided with one and is mounted on the first pipe 110, the first clamping hole 111 is provided with more than two and is disposed on the second pipe 200, the more than two first clamping holes 111 are disposed on the second pipe 200 along the length direction of the second pipe 200, the telescopic mechanism can also perform length adjustment besides having an extended state and a contracted state with the shortest length, during the length adjustment of the telescopic mechanism, the unlocking piece 400 is firstly switched from the first position to the second position, then the telescopic mechanism is retracted, during this process, the elastic top bead 300 cannot be extended and inserted into any one of the first clamping holes 111, after the telescopic mechanism is retracted to a required length, the unlocking piece 400 is switched from the second position to the first position, and then the elastic top bead 300 is inserted into the corresponding first clamping hole 111 to lock the second pipe 200 to the first pipe 110 again.

It can be appreciated that the unlocking member 400 can facilitate the length adjustment of the telescopic mechanism, and the telescopic mechanism can be extended or shortened without the user having to press the elastic top bead 300 more than once by hand during the length adjustment process of the telescopic mechanism.

It is conceivable that, in some embodiments, when the first clamping hole 111 is disposed in the second pipe 200 and the elastic top bead 300 is disposed in the first pipe 110, one end of the first pipe 110, which is close to the second pipe 200, is provided with a mounting portion, the mounting portion is provided with a mounting hole along a radial direction of the first pipe 110, the mounting hole is communicated to the inside of the first pipe 110, one end of the unlocking member 400 is screwed to one end of the mounting hole, which is far away from the first pipe 110, the elastic top bead 300 is slidably mounted in the mounting hole and is connected with the unlocking member 400, the unlocking member 400 can be switched between the first position and the second position by rotating the unlocking member 400, when the unlocking member 400 is in the first position, one end of the unlocking member 400 is close to the first pipe 110, so that the clamping portion 310 of the elastic top bead 300 can extend into the first pipe 110 and be inserted into the first clamping hole 111, and when the unlocking member 400 is switched from the first position to the second position, the unlocking member 400 can drive the elastic top bead 300 to retract into the mounting hole, so that the clamping portion 310 of the elastic top bead 300 is separated from the first clamping hole 111.

Referring to fig. 1, 2 and 3, it is conceivable that in some embodiments, the first clamping hole 111 is disposed in the first pipe 110, the elastic top bead 300 is disposed in the second pipe 200, at this time, the unlocking member 400 is provided with an accommodating space 410, when the unlocking member 400 is in the first position, the accommodating space 410 is opposite to the first clamping hole 111, the elastic top bead 300 can be inserted into the first clamping hole 111 and the accommodating space 410, the accommodating space 410 can be configured as a through hole or an accommodating groove, when the unlocking member 400 is switched from the first position to the second position, the accommodating space 410 is far away from the first clamping hole 111, the clamping portion 310 of the elastic top bead 300 can be retracted and accommodated in the second pipe 200, and the clamping portion 310 of the elastic top bead 300 is separated from the first clamping hole 111, thereby unlocking the second pipe 200. Referring to fig. 5 and 6, when the unlocking member 400 is in the first position, the guiding portion 320 of the elastic top bead 300 is located in the accommodating space 410, and during the process of switching the unlocking member 400 from the first position to the second position, the side wall of the accommodating space 410 and the guiding portion 320 are mutually matched and abutted, so as to push the elastic top bead 300 to retract.

Referring to fig. 1 and 3, it is conceivable that in some embodiments, the unlocking member 400 is annular, the unlocking member 400 is rotatably sleeved at one end of the first pipe fitting 110, the second pipe fitting 200 is threaded through the unlocking member 400, through the above arrangement, the unlocking member 400 can be installed, and the overall appearance of the telescopic mechanism is better.

Referring to fig. 2, 3 and 6, it is conceivable that in some embodiments, the elastic top bead 300 further includes a guide portion 320 disposed at an end of the clamping portion 310, the unlocking member 400 is provided with a pushing portion 440, when the unlocking member 400 is located at the second position, the pushing portion 440 can be inserted into the first clamping hole 111 and abut against the guide portion 320, so that the guide portion 320 is further retracted toward the inside of the second pipe 200, and the depth of the guide portion 320 inserted into the first clamping hole 111 is reduced, so that during the relative movement of the first pipe 110 and the second pipe 200, the guide portion 320 is easier to separate from the first clamping hole 111, and the operation is more labor-saving and convenient.

Specifically, in some embodiments, the unlocking member 400 may have a certain elasticity, the pushing portion 440 is a protrusion with a height within 2mm, or the pushing portion 440 is provided as a retractable component such as a shrapnel, a spring top bead, or the like, so that it may be ensured that the unlocking member 400 can be switched between the first position and the second position.

Specifically, in other embodiments, the outer periphery of the first pipe 110 is provided with a avoidance groove, which communicates with the first clamping hole 111, and the pushing portion 440 is slidably inserted into the avoidance groove, so that it is also ensured that the unlocking member 400 can be switched between the first position and the second position.

Referring to fig. 3, 5 and 6, it is conceivable that in some embodiments, the inner wall of the unlocking member 400 is provided with a guide groove 420, the guide groove 420 is communicated with the accommodating space 410, when the unlocking member 400 is switched from the first position to the second position, the elastic top bead 300 in the first clamping hole 111 enters the guide groove 420 and is pushed to retract by the bottom wall of the guide groove 420, and by the arrangement of the guide groove 420, the unlocking member 400 is operated more smoothly.

Referring to fig. 5, it is conceivable that in some embodiments, one side of the guide groove 420 extends to an end surface of one end of the unlocking member 400 along the axial direction of the unlocking member 400, so that the guide groove 420 can be formed together in the injection molding process of the unlocking member 400, and the forming difficulty is low, and the guide groove 420 does not need to be machined in addition to the unlocking member 400, so that the cost is reduced.

It is envisioned that in some embodiments, a limiting structure for limiting the rotational range of the unlocking member 400 is provided between the unlocking member 400 and the first tube member 110.

Referring to fig. 2 to 4, it is conceivable that in some embodiments, the limiting structure includes a limiting block 430 and a limiting member 120, the limiting member 120 is detachably mounted at one end of the first pipe member 110, the limiting member 120 and the first pipe member 110 enclose to form a limiting groove 130, the limiting groove 130 is disposed along a circumferential direction of the first pipe member 110, the limiting block 430 is disposed on an inner wall of the unlocking member 400, the limiting block 430 is inserted into the limiting groove 130 and can move along the limiting groove 130, and then the limiting groove 130 and the limiting block 430 cooperate to guide the unlocking member 400 to rotate, and limit a rotation range of the unlocking member 400. In the installation process, the unlocking piece 400 can be sleeved on the first pipe fitting 110, then the limiting piece 120 is inserted into the unlocking piece 400 and detachably connected to the first pipe fitting 110, and the assembly can be completed.

Referring to fig. 2 and 4, it is conceivable that in some embodiments, the limiting member 120 includes an annular portion 121, one end of the annular portion 121 is provided with an abutting portion 122 and an elastic connection portion 123, the elastic connection portion 123 is clamped with the first tube 110, the abutting portion 122 abuts against the first tube 110, the annular portion 121 and the first tube 110 enclose to form a limiting groove 130, and the second tube 200 is penetrated through the annular portion 121, so that the installation of the limiting member 120 can be realized.

Referring to fig. 2 and fig. 4, it is conceivable that, in some embodiments, the elastic connection portion 123 is inserted into the first pipe 110, the first pipe 110 is provided with the second clamping hole 112, the elastic connection portion 123 is provided with the clamping block 124, the clamping block 124 is clamped into the second clamping hole 112, and in the process of installing the limiting member 120, the inner wall of the first pipe 110 can push away the elastic connection portion 123 and the clamping block 124, so that the elastic connection portion 123 can be smoothly inserted into the first pipe 110, and then the clamping block 124 is clamped into the second clamping hole 112, so that the limiting member 120 can be installed conveniently.

Referring to fig. 6, it is conceivable that in some embodiments, the accommodating space 410 is a through hole, when the unlocking member 400 is in the second position, the accommodating space 410 is opposite to the second clamping hole 112, so when the limiting member 120 needs to be detached, the unlocking member 400 needs to be switched to the second position, and then the inserting tool is inserted into the accommodating space 410 to push the clamping block 124 to be separated from the second clamping hole 112, so that the limiting member 120 can be conveniently detached. In addition, the clamping block 124 is located inside the unlocking piece 400, so that the situation that the clamping block 124 is accidentally separated from the second clamping hole 112 is effectively avoided, and safety is improved.

Referring to fig. 2, it is conceivable that, in some embodiments, when more than two elastic top beads 300 are disposed on the second pipe member 200, one end of the annular portion 121 facing the second pipe member 200 is provided with a guiding surface 125 for guiding retraction of the elastic top beads 300, so that the elastic top beads 300 passing through the annular portion 121 can retract automatically when the length of the telescopic mechanism is adjusted, and the telescopic mechanism can retract more smoothly.

Referring to fig. 2, it is conceivable that in some embodiments, one of the inner wall of the first pipe fitting 110 and the outer wall of the second pipe fitting 200 is provided with a guide groove 113, and the other is provided with a guide block 210, where the guide groove 113 is disposed along the length direction of the first pipe fitting 110, and the guide block 210 is slidably embedded in the guide groove 113, so that the second pipe fitting 200 slides along a preset path relative to the first pipe fitting 110 all the time, and misalignment of the elastic top bead 300 and the first clamping hole 111 is avoided. Of course, it is conceivable that when the cross-sectional profiles of the first tube member 110 and the second tube member 200 are elliptical, square or other non-circular shapes, the second tube member 200 always slides along a predetermined path relative to the first tube member 110, so that the guide grooves 113 and the guide blocks 210 may not be provided.

Referring to fig. 2 to 4, it is conceivable that, in some embodiments, a detent structure is provided between the unlocking member 400 and the first tube member 110, where the detent structure is used to locate the unlocking member 400 in the first position, so as to avoid that the unlocking member 400 accidentally rotates to retract the elastic top bead 300 in the first clamping hole 111, thereby avoiding that the second tube member 200 is accidentally unlocked.

Specifically, in some embodiments, the locking structure may include a locking groove 450 and a first protrusion 126, at least one of the first protrusion 126 and a side wall of the locking groove 450 has elasticity, the first protrusion 126 is disposed on the side wall of the limiting groove 130, the locking groove 450 is disposed on the limiting block 430, and when the unlocking member 400 is located at the first position, the first protrusion 126 can be locked in the locking groove 450.

Specifically, in other embodiments, the above-mentioned latching structure may also be provided in other manners, for example, the first latching structure includes two magnets respectively disposed on the unlocking member 400 and the first tube 110, and when the unlocking member 400 is located at the first position, the two magnets may attract each other to position the unlocking member 400.

It is conceivable that other arrangements of the above-mentioned limiting structure may be adopted, for example, the limiting structure may include a second protrusion disposed on the outer wall of the first tube 110 and a third protrusion disposed at one end of the unlocking member 400 away from the second tube 200, where the second protrusion is located at one side of the unlocking member 400 away from the second tube 200, and the second protrusion and the third protrusion can mutually cooperate and abut, so as to limit the rotation range of the unlocking member 400.

It should be noted that, in some embodiments, when the first clamping hole 111 is disposed in the first pipe 110 and the elastic top bead 300 is disposed in the second pipe 200, the unlocking member 400 is slidably mounted in the first pipe 110, where the unlocking member 400 may slide along the length direction of the first pipe 110, when the unlocking member 400 is in the first position, the unlocking member 400 is close to the second pipe 200, and when the unlocking member 400 is in the second position, the unlocking member 400 is far away from the second pipe 200.

Referring to fig. 7, a telescopic crutch according to an embodiment of the present utility model includes the telescopic mechanism described above. Through adopting foretell telescopic machanism, the walking stick is when needs shrink, can be earlier with unblock piece 400 from first position switch to the second position, this in-process unblock piece 400 can make the elasticity top pearl 300 retract in the first joint hole 111 for the joint portion 310 of elasticity top pearl 300 breaks away from first joint hole 111, thereby release the locking to second pipe fitting 200, then just can make first pipe fitting 110 and second pipe fitting 200 relatively remove the shrink, thereby realize the walking stick shrink, so, the walking stick need not the user and makes two adjacent pipe fittings relatively move with effort while pressing elasticity top pearl 300 with the hand in shrink process, make things convenient for the walking stick shrink.

In the specific implementation process, the crutch can comprise one telescopic mechanism or more than two telescopic mechanisms which are sequentially connected.

It should be noted that, referring to fig. 7, when the crutch includes more than two telescopic mechanisms, the first pipe 110 of one telescopic mechanism and the second pipe 200 of the other telescopic mechanism can be connected together to form one pipe in two adjacent telescopic mechanisms, and at this time, the crutch has more than three pipes.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The present embodiment has been described in detail with reference to the drawings, but the present utility model is not limited to the above embodiment, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit.

Claims (10)

1. A telescopic mechanism, comprising:

a first tube (110);

the second pipe fitting (200) is slidably inserted into one end of the first pipe fitting (110), at least one group of locking structures are arranged between the first pipe fitting (110) and the second pipe fitting (200), each group of locking structures comprises a first clamping hole (111) and an elastic top bead (300), one of the first clamping hole (111) and the elastic top bead (300) is arranged on the first pipe fitting (110), the other is arranged on the second pipe fitting (200), and the elastic top bead (300) comprises a clamping part (310) used for being matched and clamped with the first clamping hole (111);

the unlocking piece (400) is movably arranged on the outer wall of one end of the first pipe fitting (110), and the unlocking piece (400) is provided with a first position and a second position and can be switched between the first position and the second position;

when the unlocking piece (400) is located at the first position, the clamping portion (310) of the elastic top bead (300) can be inserted into the first clamping hole (111) and lock the second pipe fitting (200) on the first pipe fitting (110), and when the unlocking piece (400) is switched from the first position to the second position, the unlocking piece (400) can enable the clamping portion (310) of the elastic top bead (300) in the first clamping hole (111) to be separated from the first clamping hole (111).

2. The telescopic mechanism according to claim 1, wherein in each set of the locking structures, one first clamping hole (111) is provided and arranged on the first pipe (110), two or more elastic top beads (300) are provided and arranged on the second pipe (200), and the two or more elastic top beads (300) are arranged along the length direction of the second pipe (200); or, in each group of locking structures, the elastic top bead (300) is provided with one and is installed on the first pipe fitting (110), the first clamping holes (111) are provided with more than two and are arranged on the second pipe fitting (200), and more than two first clamping holes (111) are arranged on the second pipe fitting (200) along the length direction of the second pipe fitting (200).

3. The telescopic mechanism according to claim 1 or 2, wherein the first clamping hole (111) is formed in the first pipe fitting (110), the elastic top bead (300) is formed in the second pipe fitting (200), the unlocking member (400) is provided with a containing space (410), when the unlocking member (400) is located at the first position, the containing space (410) is opposite to the first clamping hole (111), the elastic top bead (300) can be inserted into the first clamping hole (111) and the containing space (410), and when the unlocking member (400) is switched from the first position to the second position, the containing space (410) is far away from the first clamping hole (111).

4. A telescopic mechanism according to claim 3, wherein the resilient top bead (300) further comprises a guide portion (320) provided at an end of the engagement portion (310), the unlocking member (400) is provided with a pushing portion (440), and when the unlocking member (400) is in the second position, the pushing portion (440) is capable of being inserted into the first engagement hole (111) and abutting against the guide portion (320).

5. A telescopic mechanism according to claim 3, wherein the unlocking member (400) is annular, the unlocking member (400) is rotatably sleeved at one end of the first pipe (110), and the second pipe (200) is arranged through the unlocking member (400).

6. The telescopic mechanism according to claim 5, wherein the inner wall of the unlocking member (400) is provided with a guiding groove (420), the guiding groove (420) is communicated with the accommodating space (410), and when the unlocking member (400) is switched from the first position to the second position, the elastic top bead (300) in the first clamping hole (111) enters the guiding groove (420) and is pushed by the bottom wall of the guiding groove (420) to retract.

7. The telescopic mechanism according to claim 5, wherein a limiting structure for limiting the rotation range of the unlocking member (400) is arranged between the unlocking member (400) and the first pipe fitting (110), the limiting structure comprises a limiting block (430) and a limiting member (120), the limiting member (120) is detachably mounted at one end of the first pipe fitting (110), the limiting member (120) and the first pipe fitting (110) are enclosed to form a limiting groove (130), the limiting groove (130) is arranged along the circumferential direction of the first pipe fitting (110), the limiting block (430) is arranged on the inner wall of the unlocking member (400), and the limiting block (430) is inserted into the limiting groove (130) and can move along the limiting groove (130).

8. The telescopic mechanism according to claim 5, wherein a detent is provided between the unlocking member (400) and the first tube member (110), the detent being for positioning the unlocking member (400) in the first position.

9. The telescopic mechanism according to claim 7, wherein the limiting member (120) comprises an annular portion (121), an abutting portion (122) and an elastic connecting portion (123) are arranged at one end of the annular portion (121), the elastic connecting portion (123) is clamped with the first pipe fitting (110), the abutting portion (122) is abutted with the first pipe fitting (110), the annular portion (121) and the first pipe fitting (110) are enclosed to form the limiting groove (130), and the second pipe fitting (200) is arranged on the annular portion (121) in a penetrating mode.

10. A telescopic crutch, comprising a telescopic mechanism as claimed in any one of claims 1 to 9.