CN219036169U - Telescopic component, leg telescopic device and support frame - Google Patents

Abstract

The utility model relates to the technical field of brackets, and provides a telescopic assembly, a leg telescopic device and a supporting frame. The telescopic assembly comprises: the pipe body part comprises at least three pipe fittings, and a locking part is arranged between any two adjacent pipe fittings; the traction wire can be pulled and put to enable any two adjacent locking parts to be linked, and meanwhile, the traction wire is switched between an unlocking state and a locking state; in the unlocking state, any two adjacent pipe fittings can relatively move along the axial direction; in the locking state, any two adjacent pipe fittings are limited in the axial direction; the embodiment of the utility model comprises a support frame, a leg telescopic device, a telescopic component and traction wires, wherein the telescopic component is switched between a locking state and an unlocking state by pulling and releasing a single traction wire, so that the telescopic of the leg telescopic device is realized.

Description

Telescopic component, leg telescopic device and support frame

Technical Field

The utility model relates to the technical field of brackets, in particular to a telescopic assembly, a leg telescopic device and a supporting frame.

Background

Tripod is one of tools for erecting photographic equipment such as video cameras, light supplement lamps, and the like, and is also an indispensable tool in professional shooting scenes such as running water, night scenes, micro-distance, and the like. Usually, the tripod uses the cradle head on the top to fix professional photographic equipment such as a video camera, a camera and the like, so as to stabilize the photographic equipment, thereby achieving the purpose of better photographic effect.

Most tripods are telescopic to facilitate adjusting the height of the stand. In the process of adjusting the height of the tripod, a locking mode is generally adopted to enable the support to be at a required fixed height, and most of the existing tripod is manually locked in a segmented mode, so that the tripod is labor-consuming and inconvenient. For example, the tripod for photographing of the support leg of the knuckle bearing with the application number CN201220559654.4, the support leg in the tripod is connected with the support rod through the knuckle bearing, and it cannot be adjusted once, and three support rods can be adjusted at the same time.

Based on this, in order to solve the above technical problems, a telescopic assembly, a leg telescopic device and a supporting frame are needed.

Disclosure of Invention

The utility model provides a telescopic assembly, a leg telescopic device and a support frame, which are used for solving the technical problem of inconvenient telescopic operation of the support frame.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a telescopic assembly, comprising:

the pipe body part comprises at least three pipe fittings, and a locking part is arranged between any two adjacent pipe fittings.

A single traction wire which can be pulled and put to enable any two adjacent locking parts to be linked and simultaneously switch between an unlocking state and a locking state; in the unlocking state, any two adjacent pipe fittings can relatively move along the axial direction; in the locking state, any two adjacent pipe fittings are limited in the axial direction.

In one embodiment, the locking component comprises a bearing seat, a moving piece and a locking unit, wherein the bearing seat is connected with the pipe fitting, the locking unit is arranged corresponding to the bearing seat, and the moving piece in any two adjacent locking components is connected with the traction wire; when in a locking state, a single traction wire can be pulled to drive any adjacent moving parts to be linked along the axial direction of the pipe body part at the same time, so that any two adjacent locking units are respectively abutted against corresponding pipe fittings at the same time, and further the axial movement of any two adjacent pipe fittings is limited.

In one embodiment, the locking component further comprises an elastic unit, the elastic unit accumulates elastic force in a locking state, and the elastic unit can release the elastic force in an unlocking state to drive the locking unit to release the abutting of the pipe fitting.

In one embodiment, the locking unit further includes a transmission member, and in a locking state, two ends of the transmission member are respectively abutted to the moving member and the corresponding locking member, so as to transmit the pressure of the moving member to the corresponding locking member, thereby driving the locking members to be simultaneously abutted to the corresponding pipe fitting.

The elastic unit further comprises a second elastic piece, and the second elastic piece is arranged between the corresponding transmission piece and the locking piece; in the locked state, the second elastic member accumulates a retaining force to eliminate an engagement gap between the locking member and the corresponding pipe member.

In one embodiment, the telescopic assembly further comprises a plurality of shaping members, the shaping members extend along the axial direction and are arranged between two adjacent pipe fittings, the locking parts are arranged between two adjacent shaping members, the shaping members are sleeved on the traction wires to prevent the traction wires from knotting, and in an unlocking state, the shaping members can extend and shorten along the axial direction.

In one embodiment, the locking component further comprises a sliding block and a third elastic piece, any adjacent sliding blocks are connected through the same single traction wire, when in a locking state, two ends of the third elastic piece are respectively abutted against the corresponding sliding block and the bearing seat, and the third elastic piece accumulates elastic force; when the telescopic component is in an unlocking state, the third elastic piece can release elastic force to drive the sliding block to drive the moving piece to move in the direction close to the sliding block, so that the telescopic component is unlocked.

In one embodiment, the pipe is provided with tooth grooves extending continuously along the axial direction, and the tooth grooves can be used for the locking units to engage, so that the axial limit of any two adjacent pipe is realized.

In one embodiment, the telescopic assembly, the pipeline assembly and the plurality of connectors are included, the pipeline assembly comprises a plurality of pipe bodies corresponding to the pipe pieces in number, any pipe piece in the telescopic assembly is connected with the corresponding pipe body in the pipe body part through the corresponding connector, and therefore any pipe piece is linked with the corresponding pipe body.

In one embodiment, the support frame comprises a plurality of leg telescopic devices and a base, and the leg telescopic devices are all rotatably connected to the base so as to realize opening and closing of the support frame.

As can be seen from the technical scheme, the embodiment of the utility model has at least the following advantages and positive effects:

the embodiment of the utility model comprises a support frame, a leg telescopic device, a telescopic component and traction wires, wherein the telescopic component is switched between a locking state and an unlocking state by pulling and releasing a single traction wire, so that the telescopic of the leg telescopic device is realized.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a support frame in a folded state according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a support frame in an open state according to an embodiment of the present utility model;

FIG. 3 is a schematic view of the leg extension apparatus of FIG. 1 according to the present utility model;

FIG. 4 is an exploded view of the piping assembly of FIG. 3 according to the present utility model;

FIG. 5 is an exploded view of the telescoping assembly of FIG. 3 in accordance with the present utility model;

FIG. 6 is a cross-sectional view of the support bracket of FIG. 1 taken along the line A-A in accordance with the present utility model;

FIG. 7 is an enlarged cross-sectional view of portion B of FIG. 6 in accordance with the present utility model;

fig. 8 is an exploded view of the locking member of fig. 1 in accordance with the present utility model.

The reference numerals are explained as follows:

1-a supporting frame;

2-leg extension means; 3-a base;

4-telescoping assembly; 40-a tube body part; 401-a tube; 4011—a first tube; 4011 A-A blocking plate; 4012-a second tube; 4013-a third tube; 4014-tooth slots; 41-locking means; 410-a bearing seat; 4100—earplates; 411-moving member; 4110-a second guiding surface; 412-a locking unit; 4120-locking member; 4120 A-A limit groove; 4121-a transmission; 4121 A-A first guide surface; 413-an elastic unit; 4130-a first resilient member; 4131-a second resilient member; 42-pulling wires; 43-a third elastic member; 44-a slider; 46-shaping piece; a 5-tubing assembly; 50-a tube body; 6-coupling.

Detailed Description

Exemplary embodiments that embody features and advantages of the present utility model will be described in detail in the following description. It will be understood that the utility model is capable of various modifications in various embodiments, all without departing from the scope of the utility model, and that the description and illustrations herein are intended to be by way of illustration only and not to be construed as limiting the 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 a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "arranged," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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 terms in this application will be understood by those of ordinary skill in the art in a specific context.

First embodiment

Referring to fig. 1, the present utility model provides a support 1 for carrying a photographing apparatus or a video recording apparatus. The supporting frame 1 can adjust the setting angle of the shooting or video equipment, so that the use requirement of a user on the shooting or video equipment is met under the reasonable setting angle state, and the use requirement of the user on various scenes such as shooting pictures, recording videos and the like by using the shooting or video equipment can be met. The shooting or video recording device may be an intelligent device such as a camera or a video camera.

The support frame 1 comprises a seat body 3 and a leg extension device 2. Specifically, the base 3 is used for supporting photographing or video equipment, the leg extension device 2 is used for supporting the base 3, and the leg extension device 2 is connected to the base 3 to realize the length change of the leg extension device 2, thereby adjusting the height of the support frame 1. The leg extension device 2 can also be movably connected with the seat body 3 to realize rotation relative to the seat body 3. With continued reference to fig. 1 and 2, in the open condition, the leg extension 2 is disposed obliquely to the axis of the support frame 1; in the folded state, the leg extension device 2 is arranged parallel to the axis of the support frame 1. It should be noted that the leg extension device 2 may be manufactured, sold, and used separately.

The leg extension device 2 is movably connected with the seat body 3. Specifically, the leg extension device 2 is rotatably connected to the base 3, so as to open and close the support frame 11. In other embodiments, other connection manners of the leg extension device 2 and the base 3 may be adopted, so long as the connection manner capable of opening and closing the support frame 1 is within the scope of protection of the present application. It should be noted that, in other embodiments, the leg extension device 2 may not rotate relative to the base 3, and at this time, the leg extension device 2 may be extended and shortened to change the supporting height of the base 3, so that the photographing apparatus mounted on the base 3 is located at a reasonable photographing height, and in a specific usage scenario, the user may hold the leg extension device 2 with his or her hand to use the same as a selfie stick.

With continued reference to fig. 1 and 2, the support frame 1 includes three leg extension devices 2, specifically, three leg extension devices 2 are arranged at intervals in the circumferential direction of the base 3, so as to ensure stable support of the support frame 1. In other embodiments, the number of leg extension devices 2 is not limited. It is understood that the number of leg extension devices 2 which can achieve stable support of the support frame 1 is within the scope of the present application.

When the support frame 1 is in the folded state, the axes of the three leg extension devices 2 are parallel to each other, and the axes of the three leg extension devices 2 are all perpendicular to the cross section of the seat body 3. When the leg extension device 2 in the support frame 1 in the folded state is in the contracted state, the support frame 1 is convenient to store and transport. When the support frame 1 is in an open state, the axes of the three leg telescopic devices 2 are all at preset angles with the axis of the support frame 1, and the leg telescopic devices 2 are in a contracted state or an extended state so as to realize stable support of the support frame 1.

Referring to fig. 3 and 4, the leg extension device 2 includes an extension assembly 4, a pipe assembly 5, and a plurality of coupling members 6, and the extension assembly 4 is coupled with the pipe assembly 5 through the coupling members 6 to realize linkage or axial limitation of the extension assembly 4 and the pipe assembly 5, thereby realizing extension and retraction of the leg extension device 2. It should be noted that the purpose of the connection between the telescopic assembly 4 and the pipe assembly 5 via the connector 6 is to increase the supporting force of the leg telescopic device 2, so as to widen the application range of the support frame 1. By employing a single telescoping assembly 4 coupled to the conduit assembly 5, a cost savings is also achieved. In other embodiments, the pipe assembly 5 may be omitted, or the number of the pipe assemblies 5 may be 3 or more, so long as the composition of the leg extension device 2 capable of extending and retracting the leg extension device 2 is within the scope of the present application under the premise of ensuring the supporting strength of the supporting frame 1.

Referring to fig. 5, the telescopic assembly 4 includes a pipe body part 40, a locking part 41 and a single pulling wire 42, the locking part 41 and the pulling wire 42 are both disposed in the pipe body part 40, the pulling wire 42 is connected to the locking part 41, and the single pulling wire 42 can be pulled to switch the telescopic assembly 4 between a locking state and an unlocking state, so that length adjustment of the telescopic assembly 4 is achieved. Wherein, when the telescopic assembly 4 is in the locked state, the locking member 41 restricts the telescopic assembly 4 from being extended and shortened to maintain the telescopic assembly 4 at a certain fixed extended length.

With continued reference to fig. 5, the body member 40 includes at least three tubes 401, and any two adjacent tubes 401 are sequentially movably connected to each other to achieve telescoping of the telescoping assembly 4. For ease of understanding and description, three tubular members 401 are designated herein as a first tubular member 4011, a second tubular member 4012, and a third tubular member 4013, respectively. It should be noted that in other embodiments, the number of the tubes 401 is not limited. For example, the body member 40 may include four tubes 401; alternatively, the body member 40 may also include five tubes 401. From the above, it is apparent that the pipe body part 40 includes N pipe members 401, N is a positive integer, and N is not less than 3. It is understood that the number of tubes 401 to achieve telescoping of the leg rest 2 should be within the scope of the present application.

Referring to fig. 6, a locking member 41 is provided to the pipe body member 40, specifically, the locking member 41 is provided between adjacent two pipe members 401. More specifically, for convenience of description and understanding, the N pipe elements 401 are named as a first pipe element 4011 and a second pipe element 4012 … …, respectively, and the N pipe element 401, then the locking component 41 is disposed on the M pipe element 401, where M is a positive integer, M is not greater than N, and M is not equal to 1, so that the locking component 41 is switched between the locked state and the unlocked state, so as to realize linkage or axial limitation of any two adjacent pipe elements 401, thereby realizing the extension and retraction of the retraction assembly 4. In other embodiments, the position of the locking member 41 is not limited.

Obviously, the number of the locking parts 41 is (N-1), N is a positive integer, and N is not less than 3. Here, referring to fig. 7 and 8, the locking part 41 includes a bearing seat 410, an elastic unit 413, a moving member 411, and a locking unit 412. Specifically, the carrying seat 410 is connected to the corresponding pipe fitting 401, the locking units 412 are disposed on the corresponding carrying seat 410, and the moving members 411 in any two adjacent locking members 41 are connected to the pulling wire 42. When the telescopic assembly 4 is in the locked state, the elastic unit 413 accumulates elastic force; in the unlocked state, the elastic unit 413 releases the elastic force to simultaneously release the abutting of the plurality of locking members 41 to the corresponding tube 401. It should be understood that in other embodiments, the elastic unit 421 is not an essential feature of the implementation of the solution, i.e. the elastic unit 421 may be omitted. When the telescopic assembly 4 is in the unlocked state, the moving member 411 does not limit the radial movement of the locking unit 412 any more, and the two adjacent tubes 401 can be stretched and shortened against the holding force of the locking unit 412 under the pulling action of the external force.

Referring to fig. 8, more specifically, for convenience of description and understanding, it is to be noted that the locking unit 412 is provided with a first guide surface 4121a facing the moving member 411, the moving member 411 is provided with a second guide surface 4110 facing the locking unit 412, and a normal direction of at least one of the first guide surface 4121a and the second guide surface 4110 is inclined to an axis of the support frame 1 in the folded state to achieve that the locking unit 412 is pressed against the corresponding pipe member 401, thereby changing a relative movement state between any adjacent two pipe members 401. That is, at least one of the first and second guide surfaces 4121a and 4110 is inclined or curved so that the plurality of moving members 411 are simultaneously pulled to be moved in the axial direction, thereby pressing the corresponding locking unit 412 to lock the locking unit 412 with the corresponding pipe 401 in the radial direction.

The bearing seat 410 is connected with the corresponding pipe fitting 401, and more specifically, the bearing seat 410 is clamped on the corresponding pipe fitting 401, so that the bearing seat 410 is abutted or disengaged from the corresponding pipe fitting 401 through a locking unit 412 on the bearing seat 410, and therefore linkage or simultaneous axial limiting of any two adjacent pipe fittings 401 is achieved. It should be noted that, the corresponding pipe 401 that the bearing seat 410 is clamped to and the corresponding pipe 401 that the locking unit 412 is abutted to are two adjacent different pipe 401. For example, referring to the designations of the three tubes 401, the corresponding tube 401 clamped by the carrier 410 may be the second tube 4012, the corresponding tube 401 abutted by the locking unit 412 may be the first tube 401, and so on. In other embodiments, the connection manner of the carrier 410 and the corresponding tube 401 is not limited. It can be appreciated that the connection mode of any two adjacent tubes 401 linked or axially limited at the same time should be within the protection scope of the present application as long as the locking unit 412 on the carrier 410 can be abutted or released.

The locking units 412 are disposed on the corresponding carriers 410, and specifically, the locking units 412 are disposed on the corresponding carriers 410, so that the carriers 410 support the locking units 412. In other embodiments, the locking unit 412 and the corresponding carrier 410 may be connected in other manners. It is understood that the connection manner of the locking unit 412 supported by the carrier 410 and the corresponding carrier 410 is within the scope of the present application.

The locking unit 412 includes a plurality of locking members 4120, and the plurality of locking members 4120 are circumferentially spaced apart along the pipe body part 40. In the locked state, one end of the locking member 4120 abuts against the corresponding tube 401, and the other end directly or indirectly abuts against the corresponding moving member 411. More specifically, retaining member 4120 is also provided with a tooth-like structure to effect engagement of retaining member 4120 with tube 401. Correspondingly, the pipe 401 is provided with a spline 4014 (refer to fig. 6). Preferably, the tubes 401 are provided with axially continuous slots 4014 for engagement by the locking members 41 to effect axial restraint of any two adjacent tubes 401. In other embodiments, the locking member 4120 may have other structures, and the inner wall of the tube 401 may be flat, so that the locking member 41 abuts against the corresponding tube 401, thereby realizing axial limitation of any two adjacent tubes 401. It is understood that the structure of the pipe 401 capable of locking the locking member 41 and the corresponding pipe 401 is within the scope of the present application.

More specifically, the locking member 4120 is provided with a limiting groove 4120a, and the elastic unit 413 includes a first elastic member 4130, where the first elastic member 4130 is clamped in the limiting groove 4120a. The first elastic member 4130 is ring-shaped, and the first elastic member 4130 in the locked state can store elastic force; the first elastic member 4130 in the unlocked state can release the elastic force to drive the corresponding plurality of locking members 4120 to simultaneously release the abutment of the corresponding tube 401. In other embodiments, the first resilient member 4130 may also be other shapes. It is understood that the shape of the first elastic unit 413 that drives the corresponding locking members 4120 to release the abutment of the corresponding tube 401 at the same time is within the scope of the present application.

The locking unit 412 further includes a plurality of transmission members 4121, where the transmission members 4121 correspond to the locking members 4120, the plurality of transmission members 4121 are circumferentially spaced along the pipe body member 40, and one end of each transmission member 4121 abuts against the moving member 411, and the other end directly or indirectly abuts against the corresponding locking member 4120. In the locked state, the plurality of transmission members 4121 can transmit the pressure transmitted from the moving member 411 to the corresponding locking member 4120, so that the plurality of locking members 4120 simultaneously abut against the corresponding tube 401. Specifically, the transmission member 4121 has a substantially cylindrical shape, and the difference is that the end surface of the transmission member 4121 near the moving member 411 transitions and engages with the peripheral side surface to form a curved surface, which is the first guiding surface 4121a. In other embodiments, the shape of the driver 4121 is not limited. It is understood that the shape of the driving member 4121 corresponding to the locking member 4120 should be within the scope of the present application as long as the driving member 4121 can transfer the pressure transferred by the moving member 411.

With continued reference to fig. 7 and 8, more specifically, the driver 4121 indirectly abuts the corresponding lock 4120. And the elastic unit 413 includes a second elastic member 4131, and the second elastic member 4131 is disposed between the transmission member 4121 and the corresponding locking member 4120. It is apparent that in the locked state, the second elastic member 4131 functions to transmit the pressure transmitted from the transmission member 4121 to the corresponding locking member 4120, and the second elastic member 4131 is also capable of accumulating the holding force and eliminating the engagement gap of the locking member 4120 with the pipe member 401 by the second elastic member 4131. In other embodiments, the structure of the second elastic member 4131 is not limited. It is understood that the configuration of the second resilient member 4131 should be within the scope of the present application as long as it is capable of transmitting pressure and eliminating the engagement gap.

The pulling wire 42 is disposed in the pipe body component 40, specifically, referring to the above-mentioned tubular member 401, the pulling wire 42 is disposed through the first tubular member 4011, and then the pulling wire 42 is necessarily disposed in the pipe body component 40, so that the pipe body component 40 is linked by the single pulling wire 42, and further the leg extension device 2 is extended and retracted. More specifically, the puller wire 42 may be a thin and rigid pull cord or a flexible steel wire. In the locked state, the pulling wire 42 is pulled to drive the moving members 411 to link along the axial direction, so as to realize that the moving members 411 radially press against the corresponding locking units 412, and the locking units 412 lock the corresponding pipe 401. In the unlocked state, the pull wire 42 is in a released state. It should be noted that, the traction force of the traction wire 42 in the foregoing process may be a human force, a driving force generated by a snapping twist, a driving force generated by a driving member, or the like. Of course, in other embodiments, the material of the pull wire 41 is not limited. It is understood that the material of the pulling wire 42 is within the scope of the present application as long as the above process can be achieved.

Second embodiment

Referring to fig. 5, the telescopic assembly 4 of the present embodiment is basically the same as the telescopic assembly 4 of the first embodiment, except that the telescopic assembly 4 further includes a third elastic member 43 and a slider 44, and any adjacent sliders 44 are connected by the same single pulling wire 42. In the locked state, the two ends of the third elastic member 43 respectively abut against the corresponding slider 44 and the bearing seat 410, and in the foregoing process, the elastic force is accumulated in the third elastic member 43; in the unlocking state, the third elastic member 43 can release the elastic force to drive the slider 44 to drive the moving member 411 to move in a direction approaching to the corresponding slider 44, so as to unlock the telescopic assembly 4. It should be noted that, in the unlocking process, the third elastic member 43 is used for releasing the elastic force to drive the corresponding moving member 411 to move along the axial direction, so that the extrusion of the moving member 411 relative to the corresponding locking unit 412 is released, and the linkage of any two adjacent tubes 401 is further realized. It will be appreciated that in the first embodiment of the telescopic assembly 4, when the traction wire 42 is in the released state, the plurality of moving members 411 can also achieve the above-mentioned process under the own weight, and the third elastic member 43 and the slider 44 are added for better effect.

Third embodiment

The telescopic assembly 4 of this embodiment is substantially identical in structure to the telescopic assembly 4 of the first embodiment, except that, referring to fig. 5, the telescopic assembly 4 further comprises a shaping member 45. Specifically, the number of the shaping members 45 is plural, and the shaping members 45 are all sleeved on the same pulling wire 42 to prevent the pulling wire 42 from being knotted. Of course, the shaping member 45 may be sleeved inside and outside the single pulling wire 42. In other embodiments, the position of the shaping member 45 is not limited.

The plurality of shaping members 45 extend along the axial direction and are respectively arranged between any two adjacent pipe fittings 401, and locking components 41 are arranged between any two adjacent shaping members 45, so that the switching of any locking component 41 between a locking state and an unlocking state is realized by pulling and releasing a single pulling wire 42, and the linkage of any two adjacent pipe fittings 401 is realized. In the unlocked state, the molding member 45 can be axially extended and contracted.

Referring to fig. 7, in further detail, the first tube 4011 is provided with a blocking plate 4011a to prevent the second tube 4012 from being escaped. And the retaining plate 4011a and the bearing seat 410 are respectively provided with an ear plate for fixing two ends of the shaping piece 45 so as to limit the position of the shaping piece 45.

While the utility model has been described with reference to several exemplary embodiments, it is to be understood that the terminology used is intended to be in the nature of words of description and of limitation. As the present utility model may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims (10)

1. A telescoping assembly, comprising:

the pipe body part comprises at least three pipe fittings, and a locking part is arranged between any two adjacent pipe fittings;

a single traction wire which can be pulled and put to enable any two adjacent locking parts to be linked and simultaneously switch between an unlocking state and a locking state; in the unlocking state, any two adjacent pipe fittings can relatively move along the axial direction; in the locking state, any two adjacent pipe fittings are limited in the axial direction.

2. The telescopic assembly according to claim 1, wherein the locking member comprises a bearing seat, a moving member and a locking unit, the bearing seat is connected with the pipe fitting, the locking unit is arranged corresponding to the bearing seat, and the moving member in any two adjacent locking members is connected with the traction wire; when in a locking state, a single traction wire can be pulled to drive any adjacent moving parts to be linked along the axial direction of the pipe body part at the same time, so that any two adjacent locking units are respectively abutted against corresponding pipe fittings at the same time, and the axial movement of any two adjacent pipe fittings is limited.

3. The telescopic assembly according to claim 2, wherein the locking member further comprises an elastic unit, the elastic unit accumulating an elastic force in a locked state, and the elastic unit being capable of releasing the elastic force in an unlocked state to bring the corresponding locking unit out of abutment with the pipe.

4. A telescopic assembly according to claim 3, wherein the locking unit comprises a plurality of locking members arranged at intervals along the circumferential direction of the pipe body assembly, and the elastic unit comprises a first elastic member, and the first elastic member is ring-shaped; the first elastic piece in the unlocking state can release elastic force to drive the corresponding locking pieces to simultaneously release the abutting of the corresponding pipe fitting.

5. The telescopic assembly according to claim 4, wherein the locking unit further comprises a transmission member, and in a locked state, two ends of the transmission member respectively abut against the moving member and the corresponding locking member, so as to transmit the pressure of the moving member to the corresponding locking member, thereby driving the plurality of locking members to simultaneously abut against the corresponding pipe fitting;

the elastic unit further comprises a second elastic piece, and the second elastic piece is arranged between the corresponding transmission piece and the locking piece; in the locked state, the second elastic member accumulates a retaining force to eliminate an engagement gap between the locking member and the corresponding pipe member.

6. The telescopic assembly according to claim 2, further comprising a plurality of shaping members extending in an axial direction and disposed between two adjacent pipe members, the locking members being disposed between two adjacent shaping members, the shaping members being sleeved on the pulling wire to prevent the pulling wire from being knotted, the shaping members being capable of being extended and shortened in an axial direction in an unlocked state.

7. The telescopic assembly according to claim 2, wherein the locking component further comprises a sliding block and a third elastic member, any adjacent sliding blocks are connected through the same single pulling wire, and in a locking state, two ends of the third elastic member are respectively abutted against the corresponding sliding block and the bearing seat, and the third elastic member accumulates elastic force; when the telescopic component is in an unlocking state, the third elastic piece can release elastic force to drive the sliding block to drive the moving piece to move in the direction close to the sliding block, so that the telescopic component is unlocked.

8. The telescopic assembly according to claim 2, wherein the tube is provided with tooth slots extending continuously in axial direction, and the tooth slots can be engaged by the locking unit, so that axial limiting of any two adjacent tubes is realized.

9. A leg extension and retraction device comprising an extension and retraction assembly according to any one of claims 1 to 8, a conduit assembly and a plurality of connectors, the conduit assembly comprising a plurality of tubular bodies corresponding in number to the tubular members, any of the tubular members in the extension and retraction assembly being connected to a corresponding one of the tubular body members by a corresponding connector to effect the coupling of any of the tubular members to a corresponding one of the tubular bodies.

10. A support frame, comprising the leg extension device of claim 9, wherein the support frame comprises a plurality of leg extension devices and a base, and a plurality of leg extension devices are all rotatably connected to the base to realize the opening and closing of the support frame.

Images