CN219062173U

CN219062173U - Locking device for telescopic support leg

Info

Publication number: CN219062173U
Application number: CN202223362856.2U
Authority: CN
Inventors: 黄若林; 龚秋
Original assignee: Cayer Photograph Equipment Co ltd
Current assignee: Cayer Photograph Equipment Co ltd
Priority date: 2022-12-14
Filing date: 2022-12-14
Publication date: 2023-05-23
Anticipated expiration: 2032-12-14

Abstract

The utility model discloses a telescopic support leg locking device, which comprises: fixing the foot bar; the first movable foot rod is arranged on the fixed foot rod in a sliding manner so as to move in a telescopic manner relative to the fixed foot rod; the first locking structure is arranged between the first movable foot rod and the fixed foot rod and can lock or unlock the first movable foot rod on the fixed foot rod; the second movable foot rod is arranged on the first movable foot rod in a sliding manner so as to move in a telescopic manner relative to the first movable foot rod; the second locking structure is arranged between the second movable foot bar and the first movable foot bar and can lock or unlock the second movable foot bar to the first movable foot bar; the linkage mechanism is arranged between the second locking structure and the first locking structure and can be used for linking the second locking structure and the first locking structure to synchronously lock or synchronously unlock; avoid operating the locking mechanism in different positions, the user of being convenient for carries out flexible operation to flexible stabilizer blade locking device, improves convenient to use degree.

Description

Locking device for telescopic support leg

Technical Field

The utility model relates to the technical field of photographic equipment, in particular to a telescopic support leg locking device.

Background

In the photographic work, photographic equipment is often erected by adopting a photographic bracket, three telescopic supporting legs are circumferentially distributed on the common photographic bracket, and the height position of the photographic equipment is adjusted by adjusting the length dimension of the telescopic supporting legs. The common telescopic support leg comprises three sections of foot rods which are connected in sequence, two adjacent sections of foot rods are fixed in a locking and buckling mode, and when the length size of the telescopic support leg needs to be adjusted, two locking and buckling modes located in the upper and lower directions need to be operated, so that the telescopic support leg is very inconvenient to use.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, one of the purposes of the present utility model is to provide a telescopic leg locking device capable of locking each leg by interlocking with the second locking structure only by operating the first locking structure, so as to improve the convenience of use.

According to an embodiment of the utility model, a telescopic leg locking device comprises: fixing the foot bar; the first movable foot rod is arranged on the fixed foot rod in a sliding manner so as to move in a telescopic manner relative to the fixed foot rod; the first locking structure is arranged between the first movable foot bar and the fixed foot bar and can lock or unlock the first movable foot bar to the fixed foot bar; the second movable foot rod is arranged on the first movable foot rod in a sliding manner so as to move in a telescopic manner relative to the first movable foot rod; the second locking structure is arranged between the second movable foot bar and the first movable foot bar and can lock or unlock the second movable foot bar to the first movable foot bar; the linkage mechanism is arranged between the second locking structure and the first locking structure; when the first locking structure locks the first movable foot bar to the fixed foot bar, the linkage mechanism can link the second locking structure to lock the second movable foot bar to the first movable foot bar; when the first locking structure unlocks the first movable foot bar to the fixed foot bar, the linkage mechanism can link the second locking structure to unlock the second movable foot bar to the first movable foot bar.

The telescopic support leg locking device provided by the embodiment of the utility model has at least the following beneficial effects:

when the working state of the telescopic support leg locking device is required to be locked, the first movable support leg is locked on the fixed support leg only by using the first locking structure, and meanwhile, the linkage mechanism can be linked with the second locking structure to lock the second movable support leg on the first movable support leg; when the working state of the telescopic support leg locking device needs to be unlocked, the first movable support leg locking device is unlocked on the fixed support leg only by using the first locking structure, and meanwhile, the linkage mechanism can be used for linking the second locking structure to unlock the second movable support leg on the first movable support leg, so that the locking mechanisms at different positions are prevented from being operated, the telescopic support leg locking device is convenient for a user to carry out telescopic operation, and the using convenience is improved.

In some embodiments of the present utility model, the first movable leg is provided with a first movable seat penetrating through the fixed leg, the first locking structure includes a first locking member movably disposed on the first movable seat and a driving assembly connected to the first locking member, and the driving assembly can move and lock relative to the first movable seat to keep the first locking member tightly against the fixed leg.

In some embodiments of the present utility model, the driving assembly includes a connecting rod, a first shaft member and a pulling member, two ends of the connecting rod are respectively connected to the first locking member and the first shaft member, the pulling member has a cam rotatably disposed around an axis of the first shaft member, and when the pulling member rotates around the axis of the first shaft member, an eccentric portion of the cam can be self-locked to the first movable seat so as to drive the first locking member to press against a sidewall of the fixed leg through the first shaft member and the connecting rod.

In some embodiments of the present utility model, the first movable seat is disposed at an upper end of the first movable foot rod, a first fixing seat is disposed at a lower end of the first movable foot rod, the second movable foot rod is disposed through the first fixing seat, the second locking structure includes a second locking member movably disposed on the first fixing seat, the linkage mechanism includes a linkage rod movably disposed between the first movable seat and the first fixing seat, a first driving block and a second driving block are disposed at upper and lower ends of the linkage rod, the second driving block is abutted to the second locking member, an eccentric rotating member disposed on the pulling member and rotating around an axis of the first shaft member is disposed between the eccentric rotating member and the first driving block, and when the eccentric rotating member rotates, the pushing member can act on the first driving block to drive the linkage rod to move, so as to drive the second driving block to prop up the second locking member against a side wall of the first movable foot rod.

In some embodiments of the present utility model, the first driving block is provided with a first inclined surface inclined away from the pushing block from top to bottom, the pushing block is provided with a first wedge surface matched with the first inclined surface, a first elastic member is arranged between the pushing block and the first movable seat, the first elastic member drives the pushing block to abut against the eccentric rotating member, the second driving block is provided with a second inclined surface inclined towards the second locking member from top to bottom, and the second locking member is provided with a second wedge surface matched with the second inclined surface.

In some embodiments of the present utility model, the eccentric rotating member has an eccentric protrusion capable of abutting against the pushing block, the first movable seat is provided with a limiting member abutting against the pushing block to limit the pushing block to move toward the eccentric rotating member, and the limiting member is connected with a first adjusting screw capable of adjusting the extending distance of the limiting member toward the pushing block.

In some embodiments of the present utility model, the second driving block is threaded with a second adjusting screw, the second adjusting screw is connected to the lower end of the linkage rod in a threaded manner, and the second adjusting screw moves in a feeding manner relative to the linkage rod so as to adjust the distance between the second locking member and the peripheral wall of the second movable foot rod.

In some embodiments of the present utility model, a second elastic member is threaded on the second adjusting screw, and two ends of the second elastic member respectively abut against the first fixing seat and the second driving block to drive the linkage rod to return.

In some embodiments of the present utility model, the connecting rod is a screw rod penetrating the first locking member and screwed to the first shaft, the first movable seat is provided with a long strip perforation for the first shaft to movably penetrate, the cross section of the long strip perforation is in a long strip shape, the length direction of the cross section of the long strip perforation is consistent with the length direction of the screw rod, the screw rod is provided with a third elastic member penetrating the screw rod to drive the first locking member to be far away from the fixed foot rod, and the screw rod can rotate relative to the first shaft to adjust the distance between the first locking member and the peripheral wall of the fixed foot rod.

In some embodiments of the present utility model, two fixed foot bars are arranged in parallel and spaced apart, the first movable seat is penetrated through the two fixed foot bars, the first movable foot bar and the linkage bar are arranged in parallel and spaced apart and positioned between the two fixed foot bars, the second movable foot bar is arranged in parallel between the first movable foot bar and the linkage bar, and a connecting seat for the movable penetration of the first movable foot bar, the linkage bar and the second movable foot bar is connected between the lower ends of the two fixed foot bars.

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 an embodiment of a telescoping leg lock of the present utility model;

FIG. 2 is a schematic view of the embodiment of FIG. 1 with the first locking mechanism and the linkage mechanism separated;

FIG. 3 is a schematic view of the first locking mechanism and linkage mechanism of FIG. 2 from another perspective;

FIG. 4 is a schematic internal cross-sectional view of the embodiment of FIG. 1 at a second locking structure;

fig. 5 is an exploded view of the components of the embodiment of fig. 4.

Reference numerals:

a fixed foot bar 100;

a first movable foot bar 200; a first movable seat 210; a stopper 211; a limit ramp 2111; a first adjustment screw 212; a strip perforation 213; a first fixing base 220;

a first locking structure 300; a first locking member 310; a connecting rod 321; a first shaft member 322; a toggle 323; cam 3231; a third elastic member 324;

a second movable foot bar 400;

a second locking structure 500; a second wedge surface 510;

a linkage mechanism 600; a link lever 610; a first driving block 620; a first slope 621; a second driving block 630; a second bevel 631; a second adjustment screw 632; a second elastic member 633; an eccentric rotation member 640; eccentric convex portions 641; a push block 650; a first wedge face 651; mating ramp 652; a first elastic member 660;

and a connection base 700.

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 terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on the orientation or positional relationship shown in the drawings, are merely for convenience of describing the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore 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, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" 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.

Referring to fig. 1 to 5, a telescopic leg locking device of the present utility model includes: a fixed foot bar 100; the first movable foot bar 200 is slidably disposed on the fixed foot bar 100 to move telescopically in a direction parallel to the fixed foot bar 100; the first locking structure 300 is arranged between the first movable foot bar 200 and the fixed foot bar 100, and can lock or unlock the first movable foot bar 200 to the fixed foot bar 100; the second movable foot bar 400 is slidably disposed on the first movable foot bar 200 to move telescopically in a direction parallel to the first movable foot bar 200; the second locking structure 500 is arranged between the second movable foot bar 400 and the first movable foot bar 200, and can lock or unlock the second movable foot bar 400 to the first movable foot bar 200; the linkage mechanism 600 is arranged between the second locking structure 500 and the first locking structure 300; when the first locking structure 300 locks the first movable foot bar 200 to the fixed foot bar 100, the linkage mechanism 600 can link the second locking structure 500 to lock the second movable foot bar 400 to the first movable foot bar 200; when the first locking structure 300 unlocks the first movable foot bar 200 to the fixed foot bar 100, the linkage mechanism 600 can link the second locking structure 500 to unlock the second movable foot bar 400 to the first movable foot bar 200.

It should be noted that, when the above telescopic leg locking device is applied to a tripod, the upper end of the fixed leg bar 100 is used to connect with a tripod, and the lower end of the second movable leg bar 400 is used to contact with the ground or used to connect with a support for contacting with the ground.

When the working state of the telescopic leg locking device needs to be locked, the first movable leg 200 is locked to the fixed leg 100 only by using the first locking structure 300, and meanwhile, the linkage mechanism 600 can be linked with the second locking structure 500 to lock the second movable leg 400 to the first movable leg 200; when the working state of the telescopic support leg locking device needs to be unlocked, the first movable support leg 200 is unlocked to the fixed support leg 100 only by using the first locking structure 300, and meanwhile, the linkage mechanism 600 can be used for linking the second locking structure 500 to unlock the second movable support leg 400 to the first movable support leg 200, so that the locking mechanisms at different positions are prevented from being operated, the telescopic support leg locking device is convenient for a user to carry out telescopic operation, and the using convenience is improved.

Referring to fig. 1 and 2, in some embodiments of the present utility model, the first movable leg 200 is provided with a first movable seat 210 penetrating the fixed leg 100, the first locking structure 300 includes a first locking member 310 movably disposed on the first movable seat 210 and a driving assembly 320 connected to the first locking member 310, the driving assembly 320 can move and lock relative to the first movable seat 210 to keep the first locking member 310 tightly fixed leg 100, and similarly, the driving assembly 320 can move and unlock relative to the first movable seat 210 to separate the first locking member 310 from the fixed leg 100. It can be appreciated that the linkage mechanism 600 is connected between the driving assembly 320 and the second locking structure, and when the driving assembly 320 unlocks the first locking member 310 to the fixed foot bar 100, the linkage mechanism 600 drives the second locking structure to unlock the second movable foot bar 400 to the first movable foot bar 200, and the first movable seat 210, the first movable foot bar 200 and the second movable foot bar 400 are telescopically adjustable relative to the fixed foot bar 100 as a whole.

Referring to fig. 2 and 3, in some embodiments of the present utility model, the driving assembly 320 includes a connecting rod 321, a first shaft 322 and a pulling member 323, two ends of the connecting rod 321 are respectively connected to the first locking member 310 and the first shaft 322, the pulling member 323 has a cam 3231 rotatably disposed around an axis of the first shaft 322, and when the pulling member 323 rotates around the axis of the first shaft 322, an eccentric portion of the cam 3231 can be self-locked to the first movable seat 210 to drive the first locking member 310 to push against a sidewall of the fixed leg 100 through the first shaft 322 and the connecting rod 321. It can be appreciated that when the trigger piece 323 rotates around the axis of the first shaft 322, the eccentric portion of the cam 3231 can abut against the first movable seat 210 and tightly fit with the first movable seat 210, and the trigger piece 323 is stabilized on the first movable seat 210, and during this process, the trigger piece 323, the first shaft 322 and the connecting rod 321 are integrally biased to make the first locking piece 310 abut against the side wall of the fixed foot bar 100, so as to fix the first movable foot bar 200 on the fixed foot bar 100. The above driving assembly 320 has the advantages of simple structure, low cost, convenient production and assembly, and convenient use and operation.

Referring to fig. 2, 3 and 4, in some embodiments of the present utility model, the first movable seat 210 is disposed at an upper end of the first movable foot bar 200, the first fixed seat 220 is disposed at a lower end of the first movable foot bar 200, the second movable foot bar 400 is disposed through the first fixed seat 220, the second locking structure 500 includes a second locking member movably disposed on the first fixed seat 220, the linkage mechanism 600 includes a linkage rod 610 movably disposed between the first movable seat 210 and the first fixed seat 220, a first driving block 620 and a second driving block 630 are disposed at upper and lower ends of the linkage rod 610, the second driving block 630 is abutted with the second locking member, an eccentric rotating member 640 disposed around an axis of the first shaft 322 is disposed on the pulling member 323, a pushing block 650 is disposed between the eccentric rotating member 640 and the first driving block 620, and when the eccentric rotating member 640 rotates, the pushing block 650 acts on the first driving block 620 to drive the driving rod 610 to move, and the second driving block 630 is driven to tightly push the second locking member against a sidewall of the first movable foot bar 200.

Referring to fig. 2 and 3, when it is required to lock a certain working state of the telescopic leg locking device, the trigger piece 323 rotates around the axis of the first shaft 322, the eccentric rotating piece 640 rotates along with the trigger piece 323 to abut against the pushing piece 650, the pushing piece 650 acts on the first driving piece 620 to drive the linkage rod 610 to move upwards, and the second driving piece 630 located at the lower end of the linkage rod 610 acts on the second locking piece to tightly prop against the side wall of the first movable leg 200.

It can be appreciated that when it is required to unlock a certain working state of the telescopic leg locking device, the trigger piece 323 rotates around the axis of the first shaft 322, the eccentric rotating piece 640 rotates along with the trigger piece 323 to make the pushing piece 650 separate from the first driving piece 620, at this time, the second driving piece 630 is no longer abutted against the second locking piece, the linkage rod 610 can move downward, the first movable leg 200 can move telescopically relative to the fixed leg 100, and the second movable leg 400 can move telescopically relative to the first movable leg 200.

The above linkage mechanism 600 has simple structure, the combined structure of the driving component 320 and the linkage mechanism 600 is simple and ingenious, the production and the assembly are facilitated, and the reliability is higher.

Referring to fig. 3, 4 and 5, in some embodiments of the present utility model, the first driving block 620 is provided with a first inclined surface 621 inclined away from the pushing block 650 from top to bottom, the pushing block 650 is provided with a first wedge surface 651 matching with the first inclined surface 621, a first elastic element 660 is provided between the pushing block 650 and the first movable seat 210, the first elastic element 660 drives the pushing block 650 against the eccentric rotating element 640, the second driving block 630 is provided with a second inclined surface 631 inclined toward the second locking element from top to bottom, and the second locking element is provided with a second wedge surface 510 matching with the second inclined surface 631.

It will be appreciated that when the eccentric rotation member 640 rotates along with the trigger member 323 to drive the pushing block 650 to abut against the first driving block 620, the first driving member moves in a translational motion, the first inclined surface 621 slides upward along the first wedge surface 651, so that the linkage rod 610 moves upward, and at the same time, the second wedge surface 510 slides downward along the second inclined surface 631, so that the second locking member is pressed against the second movable foot rod 400. Through the structure, the rotation of the eccentric rotating part 640 can be converted into the translational motion of the second locking part, more parts are not needed to be additionally arranged, the whole width size of the telescopic support leg locking device is not enlarged, and the structural compactness is kept.

Referring to fig. 2 and 3, in some embodiments of the present utility model, the eccentric rotation member 640 has an eccentric protrusion 641 capable of abutting against the push block 650, the first movable seat 210 is provided with a limiting member 211 abutting against the push block 650 to limit the movement of the push block 650 toward the eccentric rotation member 640, and the limiting member 211 is connected with a first adjusting screw 212 capable of adjusting the distance that the limiting member 211 protrudes toward the push block 650.

It can be understood that, when the trigger piece 323 rotates to the eccentric portion of the cam 3231 to be capable of self-locking to the first movable seat 210, the eccentric protrusion 641 of the eccentric rotating member 640 also abuts against the pushing block 650, so that the pushing block 650 drives the first driving block 620 to move, thereby driving the linkage rod 610 to move upwards, and further driving the second locking member to lock the second movable foot rod 400 to the first movable foot rod 200 by the second driving block 630. When the trigger piece 323 rotates until the proximal end of the cam 3231 abuts against the first movable seat 210, the eccentric protrusion 641 of the eccentric rotating member 640 also rotates to one side of the pushing block 650, the pushing block 650 moves towards the eccentric rotating member 640 under the action of the first elastic member 660, and when the eccentric protrusion 641 needs to rotate again to abut against the pushing block 650, the locking member 211 can limit the moving distance of the pushing block 650 towards the eccentric rotating member 640, so as to ensure that the eccentric protrusion 641 can smoothly rotate to abut against the pushing block 650.

Referring to fig. 3, in the present embodiment, the limiting member 211 has a limiting inclined surface 2111, the pushing block 650 is provided with a mating inclined surface 652 opposite to the limiting inclined surface, when the first adjusting screw 212 adjusts the extending distance of the limiting member 211 towards the pushing block 650, the distance between the limiting inclined surface 2111 and the mating inclined surface 652 changes, the distance that the pushing block 650 can move towards the eccentric rotating member 640 also changes, accordingly, the angle that the eccentric rotating member 640 rotates to the eccentric protrusion 641 and the pushing block 650 are abutted also changes, which is beneficial to adjusting the rotating hand feel of the trigger piece 323, and the pushing block 650 and the first driving block 620 have no virtual position stroke.

Referring to fig. 4 and 5, in some embodiments of the present utility model, the second driving block 630 is penetrated with a second adjusting screw 632, the second adjusting screw 632 is screwed to the lower end of the link lever 610, and the second adjusting screw 632 is moved in a feeding manner with respect to the link lever 610 to adjust the distance between the second locking member and the outer circumferential wall of the second movable leg 400. It can be appreciated that the rod portion of the second adjusting screw 632 is in threaded connection with the lower end of the linkage rod 610, the second driving block 630 is provided with a through hole for the rod portion of the second adjusting screw 632 to pass through, and the second driving block 630 is abutted downward against the head portion of the second adjusting screw 632, when the second adjusting screw 632 rotates relative to the linkage rod 610, the second adjusting screw 632 moves up and down relative to the lower end of the linkage rod 610, the head portion of the second adjusting screw 632 can drive the second driving block 630 to rise or fall, and in this process, the second wedge surface 510 of the second locking member is always kept in contact with the second inclined surface 631 of the second driving block 630. When the linkage rod 610 ascends, the head of the second adjusting screw 632 drives the second driving block 630 to ascend, and the second locking member is pressed towards the direction of the second movable foot rod 400 under the cooperation of the second inclined surface 631 and the second wedge surface 510; when the linkage rod 610 descends, the second driving block 630 moves downwards under the action of gravity, and the second locking piece can move away from the direction of the second movable foot rod 400, so that the second movable foot rod 400 can freely stretch and retract relative to the first movable foot rod 200. The above structure is beneficial to adjusting the movement stroke of the second locking member, thereby adjusting the locking force of the second locking member on the second movable foot bar 400, so as to ensure that the second movable foot bar 400 can be locked on the first fixing seat 220.

Referring to fig. 4 and 5, in some embodiments of the present utility model, in order to assist the second locking member in rapidly unlocking the second movable foot bar 400 from the first fixed seat 220 in the case that the first locking structure 300 unlocks the first movable foot bar 210 from the fixed foot bar 100, the second adjusting screw 632 is provided with a second elastic member 633, and two ends of the second elastic member 633 respectively abut against the first fixed seat 220 and the second driving block 630 to drive the linkage bar 610 to perform a restoring motion. It can be appreciated that when the trigger piece 323 rotates until the proximal end of the cam 3231 abuts against the first movable seat 210, the first locking member 310 is away from the fixed foot bar 100, and the eccentric protrusion 641 of the eccentric rotating member 640 is staggered with the pushing block 650, the pushing block 650 moves away from the first driving block 620 under the action of the first elastic member 660, and at this time, the second elastic member 633 can drive the linkage rod 610 to move downward, so that the second driving block 630 moves downward to separate from the second locking member, the second locking member is not abutted against the second movable foot bar 400 any more, and the second movable foot bar 400 can move telescopically relative to the first fixed seat 220 and the first movable foot bar 200.

Referring to fig. 3, in some embodiments of the present utility model, the connecting rod 321 is a screw rod penetrating through the first locking member 310 and screwed to the first shaft member 322, the first movable seat 210 is provided with a long strip through hole 213 through which the first shaft member 322 is movably penetrated, the cross section of the long strip through hole 213 is in a long strip shape, the length direction of the cross section of the long strip through hole 213 is consistent with the length direction of the screw rod, the screw rod is penetrated with a third elastic member 324 driving the first locking member 310 to be far away from the fixed foot bar 100, and the screw rod can rotate relative to the first shaft member 322 to adjust the distance between the first locking member 310 and the outer peripheral wall of the fixed foot bar 100. It can be appreciated that when the first movable seat 210 needs to be locked on the fixed foot bar 100, the user can rotate the trigger piece 323 around the axis of the first shaft member 322 until the eccentric portion of the cam 3231 abuts against the first movable seat 210, and during the rotation of the trigger piece 323, the first shaft member 322 moves along the length direction of the cross section of the elongated through hole 213, so that the screw rod moves along with the first locking member 310 along with the first shaft member 322, at this time, the third elastic member 324 is compressed, the eccentric portion of the cam 3231 is tightly matched with the first movable seat 210 under the action of the third elastic member 324, and the first locking member 310 abuts against the fixed foot bar 100; when the first movable seat 210 needs to be unlocked from the fixed foot bar 100, the user can rotate the trigger piece 323 around the axis of the first shaft piece 322 until the proximal end of the cam 3231 abuts against the first movable seat 210, during the rotation of the trigger piece 323, the first shaft piece 322 moves along the length direction of the cross section of the elongated through hole 213, the screw rod and the first locking piece 310 move together along with the first shaft piece 322 to enable the first locking piece 310 to be far away from the fixed foot bar 100, at this time, the third elastic piece 324 recovers elastic deformation, and the proximal end of the cam 3231 is kept against the first movable seat 210 under the action of the third elastic piece 324.

It should be noted that, when the trigger piece 323 rotates around the axis of the first shaft 322 until the eccentric portion of the cam 3231 abuts against the first movable seat 210, if the first locking member 310 still cannot tightly press the fixed leg 100, the distance between the first locking member 310 and the fixed leg 100 needs to be shortened by screwing the screw, so as to adjust the locking force between the first locking member 310 and the fixed leg 100.

Referring to fig. 1, in some embodiments of the present utility model, two fixed pins 100 are provided, the two fixed pins 100 are parallel and spaced apart, a first movable seat 210 is movably disposed through the two fixed pins 100, a first movable pin 200 and a linkage rod 610 are parallel and spaced apart and are located between the two fixed pins 100, a second movable pin 400 is parallel disposed between the first movable pin 200 and the linkage rod 610, and a connection seat 700 for movably passing through the first movable pin 200, the linkage rod 610 and the second movable pin 400 is connected between the lower ends of the two fixed pins 100. It should be noted that, when the telescopic leg locking device of the present utility model is in the unfolded state, the first movable leg 200, the linkage rod 610 and the first movable seat 210 move downward a certain distance together with respect to the fixed leg 100, the second movable leg 400 moves downward a certain distance with respect to the first movable leg 200 and the linkage rod 610, and at this time, the first movable leg 200 and the linkage rod 610 extend out of the lower end of the fixed leg 100, and the second movable leg 400 extends out of the lower ends of the first movable leg 200 and the linkage rod 610. When the telescopic leg locking device of the present utility model is in the storage state, the second movable leg 400 moves upward a certain distance to be stored between the first movable leg 200 and the linkage rod 610, and the first movable leg 200 and the linkage rod 610 move upward a certain distance to be stored between the two fixed legs 100. The telescopic support leg locking device has smaller volume in the storage state, does not change the connecting structure between the rods of the conventional telescopic support legs, does not need to greatly reform production equipment, and is beneficial to avoiding high production cost.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above 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.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A telescoping leg lock assembly comprising:

a fixed foot bar (100);

the first movable foot rod (200) is arranged on the fixed foot rod (100) in a sliding manner so as to move in a telescopic manner relative to the fixed foot rod (100);

the first locking structure (300) is arranged between the first movable foot bar (200) and the fixed foot bar (100) and can lock or unlock the first movable foot bar (200) to the fixed foot bar (100);

the second movable foot rod (400) is arranged on the first movable foot rod (200) in a sliding manner so as to move in a telescopic manner relative to the first movable foot rod (200);

the second locking structure (500) is arranged between the second movable foot bar (400) and the first movable foot bar (200) and can lock or unlock the second movable foot bar (400) to the first movable foot bar (200);

the linkage mechanism (600) is arranged between the second locking structure (500) and the first locking structure (300);

when the first locking structure (300) locks the first movable foot bar (200) to the fixed foot bar (100), the linkage mechanism (600) can link the second locking structure (500) to lock the second movable foot bar (400) to the first movable foot bar (200);

when the first locking structure (300) unlocks the first movable foot bar (200) to the fixed foot bar (100), the linkage mechanism (600) can link the second locking structure (500) to unlock the second movable foot bar (400) to the first movable foot bar (200).

2. A telescoping leg lock assembly as in claim 1 wherein:

the first movable foot rod (200) is provided with a first movable seat (210) penetrating through the fixed foot rod (100), the first locking structure (300) comprises a first locking piece (310) movably arranged on the first movable seat (210) and a driving assembly (320) connected with the first locking piece (310), and the driving assembly (320) can move relative to the first movable seat (210) and lock so that the first locking piece (310) keeps abutting against the fixed foot rod (100).

3. A telescoping leg lock assembly as in claim 2 wherein:

the driving assembly (320) comprises a connecting rod (321), a first shaft piece (322) and a pulling fastener (323), wherein two ends of the connecting rod (321) are respectively connected with the first locking piece (310) and the first shaft piece (322), the pulling fastener (323) is provided with a cam (3231) which is arranged around the axis of the first shaft piece (322) in a rotating mode, when the pulling fastener (323) rotates around the axis of the first shaft piece (322), an eccentric part of the cam (3231) can be self-locked on the first movable seat (210) so as to drive the first locking piece (310) to prop against the side wall of the fixed foot rod (100) through the first shaft piece (322) and the connecting rod (321).

4. A telescoping leg lock assembly as claimed in claim 3 wherein:

the first movable seat (210) is arranged at the upper end of the first movable foot rod (200), a first fixing seat (220) is arranged at the lower end of the first movable foot rod (200), the second movable foot rod (400) is arranged on the first fixing seat (220) in a penetrating mode, the second locking structure (500) comprises a second locking piece which is movably arranged on the first fixing seat (220), the linkage mechanism (600) comprises a linkage rod (610) which is movably arranged between the first movable seat (210) and the first fixing seat (220), a first driving block (620) and a second driving block (630) are arranged at the upper end and the lower end of the linkage rod (610) respectively, the second driving block (630) is in butt joint with the second locking piece, an eccentric rotating piece (640) which is arranged around the axis of the first shaft piece (322) in a rotating mode is driven by a driving mode, a pushing block (650) is arranged between the eccentric rotating piece (640) and the first driving block (620), and the second driving block (620) can be driven by the second driving block (620) to move tightly when the first driving block (620) is driven by the first driving block (620).

5. The telescoping leg lock assembly as in claim 4 wherein:

the first driving block (620) is provided with a first inclined surface (621) inclined away from the pushing block (650) from top to bottom, the pushing block (650) is provided with a first wedge surface (651) matched with the first inclined surface (621), a first elastic element (660) is arranged between the pushing block (650) and the first movable seat (210), the first elastic element (660) drives the pushing block (650) to abut against the eccentric rotating element (640), the second driving block (630) is provided with a second inclined surface (631) inclined towards the second locking element from top to bottom, and the second locking element is provided with a second wedge surface (510) matched with the second inclined surface (631).

6. The telescoping leg lock assembly as in claim 5 wherein:

the eccentric rotating part (640) is provided with an eccentric convex part (641) capable of propping against the pushing block (650), the first movable seat (210) is provided with a limiting part (211) propping against the pushing block (650) to limit the pushing block (650) to move towards the eccentric rotating part (640), and the limiting part (211) is connected with a first adjusting screw (212) capable of adjusting the extending distance of the limiting part (211) towards the pushing block (650).

7. The telescoping leg lock assembly as in claim 5 wherein:

the second driving block (630) is provided with a second adjusting screw (632) in a penetrating mode, the second adjusting screw (632) is connected to the lower end of the linkage rod (610) in a threaded mode, and the second adjusting screw (632) moves relative to the linkage rod (610) in a feeding mode so as to adjust the distance between the second locking piece and the peripheral wall of the second movable foot rod (400).

8. The telescoping leg lock assembly as in claim 7 wherein:

and a second elastic piece (633) is arranged on the second adjusting screw (632) in a penetrating way, and two ends of the second elastic piece (633) respectively lean against the first fixing seat (220) and the second driving block (630) so as to drive the linkage rod (610) to return.

9. A telescoping leg lock assembly as claimed in claim 3 wherein:

the connecting rod (321) is arranged on the first locking piece (310) in a penetrating mode and is in threaded connection with a screw rod of the first shaft piece (322), a long-strip perforation (213) for the first shaft piece (322) to movably penetrate is arranged on the first movable seat (210), the cross section of the long-strip perforation (213) is in a long strip shape, the length direction of the cross section of the long-strip perforation (213) is consistent with the length direction of the screw rod, a third elastic piece (324) for driving the first locking piece (310) to be far away from the fixed foot rod (100) is arranged on the screw rod in a penetrating mode, and the screw rod can rotate relative to the first shaft piece (322) to adjust the distance between the first locking piece (310) and the peripheral wall of the fixed foot rod (100).

10. The telescoping leg lock assembly as in claim 4 wherein:

the utility model discloses a fixed foot pole (100) is provided with two, two fixed foot pole (100) interval distribution in parallel, two are worn to locate by first movable seat (210) fixed foot pole (100), first movable foot pole (200) gangbar (610) interval distribution in parallel just are located two between fixed foot pole (100), second movable foot pole (400) are located in parallel first movable foot pole (200) with between gangbar (610), two be connected with the confession between the lower extreme of fixed foot pole (100) first movable foot pole (200) gangbar (610) and connecting seat (700) that second movable foot pole (400) activity worn to establish.