CN219775367U - Telescopic supporting leg - Google Patents

Abstract

The utility model discloses a telescopic supporting leg, which comprises a front leg pipe, a middle leg pipe and a rear leg pipe which are sequentially arranged from outside to inside and can axially stretch, wherein a first locking piece comprises a movable pipe, a limiting disc, a middle inner supporting piece and a tightening piece; the second locking component comprises an inner pipe and an elastic sleeve, the middle leg pipe and the inner supporting piece can move up and down relative to the inner pipe, and then the elastic sleeve is locked on the outer wall of the rear leg pipe or the elastic sleeve and the inner pipe are loosened. So set up, can make first locking subassembly and second locking subassembly lock respectively simultaneously fixed or separation release middle section leg pipe and back end leg pipe through rotating the rotary rod, realize releasing or fixing supporting leg one key, easy operation has improved the flexible speed of adjusting of supporting leg.

Description

Telescopic supporting leg

Technical Field

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

Background

The camera support foot rest comprises a tripod and a unipod, is a support device for stabilizing the camera, can help a user to stably position in the aspects of star track shooting, running water shooting, night scene shooting, micro-distance shooting and the like, avoids shaking of the camera during shooting, ensures the shot work effect, is superior to the unipod in stability, and is superior to the tripod in portability and use flexibility. But no matter be tripod or unipod, in order to adapt to shooting angle demand, all have the supporting leg that can stretch out and draw back the regulation, traditional supporting leg is when adjusting the supporting leg, adopts the mode of multiple spot individual adjustment to adjust the supporting leg one by one step in order to adjust the height of supporting leg gradually, and this kind of supporting leg operation is comparatively complicated, adjusts slower.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to provide a telescopic supporting leg, which has the defects of complex operation and slow adjustment of the supporting leg of the supporting foot stand in the prior art.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

a telescopic supporting leg comprises a front leg pipe, a middle leg pipe and a rear leg pipe which are sequentially arranged from outside to inside and can axially stretch; the middle leg pipe and the front leg pipe are fixed relative to the circumference;

the locking control assembly is arranged at one end of the front leg pipe and comprises a rotary rod of which one end extends into the front leg pipe and can rotate;

the first locking assembly comprises a movable tube, a limiting disc, an inner supporting piece and a tightening piece which are positioned in the front leg tube; the movable pipe is connected to the rotary rod, and is fixed circumferentially and axially slides relative to the rotary rod; the limiting disc is fixed on the periphery of the movable tube; the inner support piece is fixedly connected with the middle leg pipe and is in threaded connection with the periphery of the movable pipe; the supporting piece and the limiting disc are axially fixed relative to each other and are positioned outside the inner supporting piece, and the supporting piece is provided with a supporting state for supporting the inner wall of the front leg pipe and a loosening state separated from the inner wall of the front leg pipe under the action of the inner supporting piece;

the second locking assembly comprises an inner pipe which is fixedly connected to the movable pipe in a relative axial direction and is positioned in the middle leg pipe, and an elastic sleeve which is sleeved on the periphery of the rear leg pipe and is fixedly connected with the middle leg pipe; when the inner tube and the elastic sleeve move in the relative axial direction, the elastic sleeve is provided with a locking state of partially extending into the inner tube to be locked on the outer wall of the rear leg tube and a loosening state of separating from the inner tube to loosen the rear leg tube.

Further, the inner support piece comprises a conical section with a conical shape, the outer wall of the conical section is provided with an outer conical inclined plane, the tightening piece comprises at least two inner support blocks which are mutually independent, the inner wall of each inner support block is provided with an inner conical inclined plane, and the outer conical inclined plane is matched with the inner conical inclined plane.

Further, the outer wall of the tightening piece is provided with a mounting groove, and an elastic piece which is elastically supported between the tightening piece and the outer wall of the front leg pipe is arranged in the mounting groove.

Further, an annular groove is formed in the inner wall of the limiting disc, and a buckle extending into the annular groove is arranged on the tightening piece; the buckle is matched with the groove side wall of the annular groove to realize relative axial fixation with the limiting disc.

Further, the inner support piece further comprises a cylindrical section which extends into the middle leg pipe and is fixedly connected with the middle leg pipe.

Further, the periphery fixedly connected with spacing carousel of activity pipe lower extreme, the periphery of spacing carousel is equipped with annular spacing groove, the upper end of inner tube is connected with the inner tube connecting piece, be equipped with on the inner tube connecting piece stretch into in the annular spacing groove in order to realize with spacing carousel relative axial fixation's stopper.

Further, the lower extreme outer wall fixedly connected with lock sleeve of inner tube, the inner wall of lock sleeve is equipped with interior inclined guide face, the outer wall of elastic sleeve is equipped with outer inclined guide face, interior inclined guide face with outer inclined guide face cooperatees.

Further, the outer wall of the elastic sleeve is provided with an annular clamping groove, the outer wall of the lower end of the middle leg pipe is fixedly connected with a connecting sleeve, the inner wall of the lower end of the connecting sleeve is provided with a clamping block extending into the annular clamping groove, and the clamping block is matched with the side wall of the annular clamping groove so as to be axially fixed relative to the elastic sleeve.

Further, a notch is formed in the side wall of the elastic sleeve, and the notch extends from the middle of the side wall of the elastic sleeve to the end of the side wall.

Further, a first anti-slip component is arranged between the front leg pipe and the middle leg pipe, a second anti-slip component is arranged between the middle leg pipe and the inner pipe, and a third anti-slip component is arranged between the inner pipe and the rear leg pipe.

The technical scheme of the utility model has the following advantages:

1. the telescopic supporting leg provided by the utility model is provided with the front leg pipe, the middle leg pipe and the rear leg pipe which can be axially telescopic and are fixed relative to the circumferential direction, and the front leg pipe, the middle leg pipe and the rear leg pipe cannot rotate relative to each other when being telescopic relative to each other; the first locking component enables the inner supporting piece to move up and down relative to the supporting piece and the movable pipe by rotating the rotating rod, so that the supporting piece supports the inner wall of the front leg pipe under the action of the inner supporting piece to tightly support and lock the position of the middle leg pipe or is separated from the inner wall of the front leg pipe to loosen the locking of the middle leg pipe; the middle leg pipe is fixedly connected with the inner supporting piece, the inner pipe is axially and fixedly connected with the movable pipe, the middle leg pipe can move up and down relative to the inner pipe, the elastic sleeve sleeved on the periphery of the rear leg pipe and fixedly connected with the middle leg pipe is driven to move up and down relative to the inner pipe, and then the elastic sleeve is locked on the outer wall of the rear leg pipe under the action of the inner pipe or separated from the inner pipe to loosen the rear leg pipe. So set up, only need through rotating the rotary rod, can be through first locking subassembly and second locking subassembly locking respectively fixed middle section leg pipe and back end leg pipe simultaneously or put simultaneously loose release middle section leg pipe and back end leg pipe to this is fixed with a key to supporting leg one-key release, easy operation has effectively improved the flexible regulation speed of supporting leg.

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 needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a perspective view of a telescopic support leg provided in the present utility model;

FIG. 2 is a schematic internal cross-sectional view of a telescoping support leg provided in the present utility model;

FIG. 3 is a schematic view of the first locking assembly of the present utility model in internal cross-section;

fig. 4 is a schematic view of the second locking assembly of the present utility model in an internal cross-section.

Reference numerals illustrate: 1. a front leg tube; 2. a middle leg tube; 3. a rear leg tube; 4. a first locking assembly; 41. a movable tube; 42. a limiting disc; 421. an annular groove; 43. an inner support member; 44. a bracing member; 441. a mounting groove; 442. a buckle; 45. an elastic member; 46. a limit turntable; 461. an annular limit groove; 5. a second locking assembly; 51. an inner tube; 52. an elastic sleeve; 521. an annular clamping groove; 53. an inner tube connecting member; 531. a limiting block; 54. a locking sleeve; 55. connecting sleeves; 551. a clamping block; 6. a first non-slip sheet; 7. a second non-slip sheet; 8. a third non-slip sheet; 9. a locking control assembly; 91. a mounting sleeve; 92. and (5) pulling the buckle.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

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

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "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.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

A telescopic supporting leg shown in fig. 1-4 comprises a front leg pipe 1, a middle leg pipe 2 and a rear leg pipe 3 which are sequentially arranged from outside to inside and can axially telescopic; the middle leg pipe 2 and the front leg pipe 1 are fixed relative to the circumference;

the locking control assembly 9 is arranged at one end of the front leg pipe 1 and comprises a rotary rod with one end extending into the front leg pipe 1 and capable of rotating;

the first locking component 4 comprises a movable tube 41, a limiting disc 42, an inner supporting piece 43 and a supporting piece 44 which are positioned in the front leg tube 1; the movable tube 41 is connected to the rotary rod, and is fixed circumferentially and axially slid relative to the rotary rod; the limiting disc 42 is fixed on the periphery of the movable tube 41; the inner supporting piece 43 is fixedly connected with the middle leg pipe 2 and is in threaded connection with the periphery of the movable pipe 41; the supporting piece 44 and the limiting disc 42 are axially fixed relatively and are positioned outside the inner supporting piece 43, and the supporting piece 44 is provided with a supporting state for supporting the inner wall of the front leg pipe 1 and a loosening state separated from the inner wall of the front leg pipe 1 under the action of the inner supporting piece 43;

the second locking assembly 5 comprises an inner pipe 51 which is fixedly connected to the movable pipe 41 relatively to the axial direction and is positioned in the middle leg pipe 2, and an elastic sleeve 52 which is sleeved on the periphery of the rear leg pipe 3 and is fixedly connected with the middle leg pipe 2; the elastic sleeve 52 has a locked state in which it partially protrudes into the inner tube 51 to be locked to the outer wall of the rear leg tube 3 and an unlocked state in which it is separated from the inner tube 51 to be released from the rear leg tube 3 upon relative axial movement of the inner tube 51 and the elastic sleeve 52.

The telescopic support leg is provided with the front leg pipe 1, the middle leg pipe 2 and the rear leg pipe 3 which can axially stretch and are fixed relative to the circumference, and the front leg pipe 1, the middle leg pipe 2 and the rear leg pipe 3 can not rotate relative to each other when being stretched relative to each other; the first locking component 4 enables the inner supporting piece 43 to relatively move up and down relative to the supporting piece 44 and the movable pipe 41 by rotating the rotating rod, so that the supporting piece 44 supports the inner wall of the front leg pipe 1 under the action of the inner supporting piece 43 to tightly lock the position of the middle leg pipe 2 or separates from the inner wall of the front leg pipe 1 to release the locking of the middle leg pipe 2; the middle leg pipe 2 is fixedly connected with the inner supporting piece 43, the inner pipe 51 is axially and fixedly connected with the movable pipe 41, the middle leg pipe 2 can move up and down relative to the inner pipe 51, so that the elastic sleeve 52 sleeved on the periphery of the rear leg pipe 3 and fixedly connected with the middle leg pipe 2 is driven to move up and down relative to the inner pipe 51, and then the elastic sleeve 52 is locked on the outer wall of the rear leg pipe 3 under the action of the inner pipe 51 or the elastic sleeve 52 is separated from the inner pipe 51 to loosen the rear leg pipe 3. So set up, only need through rotating the rotary rod, can pass through first locking subassembly 4 and second locking subassembly 5 respectively simultaneously locking fixed middle section leg pipe 2 and back end leg pipe 3 or put simultaneously loose release middle section leg pipe 2 and back end leg pipe 3 to this is fixed with a key to supporting leg one-key release, easy operation has effectively improved the flexible regulation speed of supporting leg.

In this embodiment, the inner supporting member 43 includes a conical section with an outer conical inclined surface on the outer wall of the conical section, and the tightening member 44 includes two inner supporting blocks independent of each other, and the inner wall of the inner supporting block has an inner conical inclined surface, and the outer conical inclined surface is matched with the inner conical inclined surface. By the arrangement, the friction force of the inner support piece 43 when moving up and down relative to the inner support piece can be smaller through the inner conical inclined surface of the inner wall of the inner support piece and the outer conical inclined surface of the outer wall of the conical section, so that the inner support piece 43 is ensured to press and abut against the inner wall of the front leg pipe 1 or be loosened, and the inner support piece is more smooth when being separated from the inner wall of the front leg pipe 1.

Specifically, two mounting grooves 441 are formed in the outer wall of the inner support block, and elastic pieces 45 elastically supported between the inner support block and the outer wall of the front leg tube 1 are arranged in each mounting groove 441. By providing the elastic member 45 in this manner, the inner stay can be kept in a tightened state separated from the inner wall of the front leg tube 1 when not being pressed.

In the present embodiment, the inner wall of the limiting disc 42 is provided with an annular groove 421, and the tightening member 44 is provided with a buckle 442 extending into the annular groove 421; the catch 442 cooperates with the groove side wall of the annular groove 421 to achieve relative axial fixation with the stopper 42. So set up, can make and prop up tight piece 44 and rotate in the annular groove 421 of limit plate 42, and can prop up tight piece 44 and carry out spacingly through annular groove 421.

In this embodiment, the inner support 43 further includes a cylindrical section that extends into the middle leg tube 2 and is fixedly connected to the middle leg tube 2. The first limited slip subassembly is including fixing the first limited slip piece 6 on cylinder section outer wall and middle section leg pipe 2 outer wall and fixing the first limited slip strip on the inner wall of anterior segment leg pipe 1, has seted up on the first limited slip strip with first limited slip strip matched with first limited slip groove, so set up, can carry out spacingly to middle section leg pipe 2 through first limited slip subassembly, can not take place to slide about guaranteeing when middle section leg pipe 2 carries out telescopic movement relative to anterior segment leg pipe 1.

In this embodiment, the outer periphery of the lower end of the movable tube 41 is fixedly connected with a limiting turntable 46, the outer periphery of the limiting turntable 46 is provided with an annular limiting groove 461, the upper end of the inner tube 51 is connected with an inner tube connecting piece 53, and the inner tube connecting piece 53 is provided with a limiting block 531 extending into the annular limiting groove 461 to be axially fixed relative to the limiting turntable 46. So set up, can carry out spacingly through spacing carousel 46 to inner tube 51, avoid inner tube 51 to take place the displacement along with the middle section shank.

In this embodiment, the second anti-slip assembly includes a second anti-slip sheet 7 fixed on the outer wall of the inner pipe connecting piece 53 and the outer wall of the inner pipe 51, and a second anti-slip strip fixed on the inner wall of the middle leg pipe 2, and a second anti-slip slot matched with the second anti-slip strip is provided on the second anti-slip strip, so that the inner pipe 51 can be limited by the second anti-slip assembly, and it is ensured that the inner pipe 51 cannot slide left and right when performing telescopic movement relative to the middle leg pipe 2.

In this embodiment, the outer wall of the lower end of the inner tube 51 is fixedly connected with a locking sleeve 54, the inner wall of the locking sleeve 54 is provided with an inner inclined guide surface, the outer wall of the elastic sleeve 52 is provided with an outer inclined guide surface, and the inner inclined guide surface is matched with the outer inclined guide surface. By such arrangement, the friction force of the middle leg pipe 2 when moving up and down relative to the locking sleeve 54 can be smaller by the inner inclined guide of the inner wall of the locking sleeve 54 and the outer inclined guide surface of the outer wall of the elastic sleeve 52, so that the inner support piece 43 is ensured to press and abut against the inner wall of the front leg pipe 1 or be loosened, and the inner support piece is more smooth when being separated from the inner wall of the front leg pipe 1.

In this embodiment, the third anti-slip assembly includes a third anti-slip sheet 8 fixed on the outer wall of the rear leg tube 3 and a third anti-slip strip fixed on the inner wall of the inner tube 51, and a third anti-slip slot matched with the third anti-slip strip is provided on the third anti-slip strip, so that the rear leg tube 3 can be limited by the third anti-slip assembly, and it is ensured that the rear leg tube 3 does not slide left and right when performing telescopic movement relative to the inner tube 51.

In this embodiment, the elastic sleeve 52 is specifically a plastic part, the outer wall of the plastic part is provided with an annular clamping groove 521, the outer wall of the lower end of the middle leg pipe 2 is fixedly connected with a connecting sleeve 55, the inner wall of the lower end of the connecting sleeve 55 is provided with a clamping block 551 extending into the annular clamping groove 521, and the clamping block 551 is matched with the groove side wall of the annular clamping groove 521 to realize relative axial fixation with the plastic part. Specifically, a notch is formed in the side wall of the plastic part, and extends from the middle of the side wall of the plastic part to the end of the side wall.

In this embodiment, two plane outer walls are disposed on the outer walls of two opposite sides of the rotating rod, and the shape of the inner peripheral wall of the movable tube 41 is adapted to the shape of the outer wall of the rotating rod, so that when the rotating rod rotates, the movable tube 41 rotates synchronously with the rotating rod.

In this embodiment, the front leg pipe 1 is fixedly connected to the mounting sleeve 91, and further comprises a mounting sleeve 91 and a trigger 92 rotatably connected to the mounting sleeve 91 and connected to the locking control assembly 9. Specifically, the locking control assembly 9 includes a rotating shaft fixedly connected with the spanner 92 and rotatably disposed on the mounting sleeve 91, a driving gear fixed on the rotating shaft, a bidirectional spur gear block meshed below the driving gear, and a driven gear meshed with the bidirectional spur gear block and connected with the rotating shaft.

In this embodiment, driven gear passes through connecting plate and rotation axis fixed connection, has seted up anti-rotation groove on the connecting plate lateral wall, is provided with the mounting panel that stretches out and draws back relatively with the connecting plate in the installation cover 91, is fixed with on the mounting panel with anti-rotation groove matched with anti-rotation piece, the one end of keeping away from anti-rotation groove on the anti-rotation piece is provided with the reset spring with the inner wall butt of installation cover 91. Through the arrangement, the mounting seat can move forwards and backwards relative to the connecting plate through spring stress, and meanwhile, the anti-rotation block is correspondingly clamped in the anti-rotation groove, so that the rotating rod cannot rotate, and the rotating rod is prevented from rotating in a locking state; when the telescopic legs are required to be telescopic and adjusted, the mounting plate is pushed towards the direction of the anti-rotation block, so that the anti-rotation block is withdrawn from the anti-rotation groove, and the smooth adjustment of the supporting legs can be ensured.

In summary, the telescopic supporting leg is provided with the front leg pipe 1, the middle leg pipe 2 and the rear leg pipe 3 which can axially stretch and are fixed relative to the circumferential direction, and the front leg pipe 1, the middle leg pipe 2 and the rear leg pipe 3 cannot rotate relative to each other when being stretched relative to each other; the first locking component 4 enables the inner supporting piece 43 to relatively move up and down relative to the supporting piece 44 and the movable pipe 41 by rotating the rotating rod, so that the supporting piece 44 supports the inner wall of the front leg pipe 1 under the action of the inner supporting piece 43 to tightly lock the position of the middle leg pipe 2 or separates from the inner wall of the front leg pipe 1 to release the locking of the middle leg pipe 2; the middle leg pipe 2 is fixedly connected with the inner supporting piece 43, the inner pipe 51 is axially and fixedly connected with the movable pipe 41, the middle leg pipe 2 can move up and down relative to the inner pipe 51, so that the elastic sleeve 52 sleeved on the periphery of the rear leg pipe 3 and fixedly connected with the middle leg pipe 2 is driven to move up and down relative to the inner pipe 51, and then the elastic sleeve 52 is locked on the outer wall of the rear leg pipe 3 under the action of the inner pipe 51 or the elastic sleeve 52 is separated from the inner pipe 51 to loosen the rear leg pipe 3. So set up, only need through rotating the rotary rod, can pass through first locking subassembly 4 and second locking subassembly 5 respectively simultaneously locking fixed middle section leg pipe 2 and back end leg pipe 3 or put simultaneously loose release middle section leg pipe 2 and back end leg pipe 3 to this is fixed with a key to supporting leg one-key release, easy operation has effectively improved the flexible regulation speed of supporting leg.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While still being apparent from variations or modifications that may be made by those skilled in the art are within the scope of the utility model.

Claims (10)

1. The telescopic supporting leg is characterized by comprising a front leg pipe (1), a middle leg pipe (2) and a rear leg pipe (3) which are sequentially arranged from outside to inside and can axially stretch; the middle leg pipe (2) and the front leg pipe (1) are fixed relative to the circumferential direction;

the locking control assembly (9) is arranged at one end of the front leg pipe (1) and comprises a rotary rod with one end extending into the front leg pipe (1) and capable of rotating;

the first locking assembly (4) comprises a movable tube (41), a limiting disc (42), an inner supporting piece (43) and a supporting piece (44) which are positioned in the front leg tube (1); the movable pipe (41) is connected to the rotating rod, and is fixed relative to the rotating rod in the circumferential direction and slides relative to the rotating rod in the axial direction; the limiting disc (42) is fixed on the periphery of the movable tube (41); the inner supporting piece (43) is fixedly connected with the middle leg pipe (2) and is in threaded connection with the periphery of the movable pipe (41); the tightening piece (44) is axially fixed relative to the limiting disc (42) and is positioned outside the inner tightening piece (43), and the tightening piece (44) is provided with a tightening state for tightening the inner wall of the front leg pipe (1) and a loosening state separated from the inner wall of the front leg pipe (1) under the action of the inner tightening piece (43);

the second locking assembly (5) comprises an inner pipe (51) which is fixedly connected to the movable pipe (41) relative to the axial direction and is positioned in the middle leg pipe (2), and an elastic sleeve (52) which is sleeved on the periphery of the rear leg pipe (3) and is fixedly connected with the middle leg pipe (2); the elastic sleeve (52) has a locked state in which it partially extends into the inner tube (51) to be locked to the outer wall of the rear leg tube (3) and a released state in which it is separated from the inner tube (51) to release the rear leg tube (3) when the inner tube (51) and the elastic sleeve (52) are moved in the relative axial direction.

2. The telescopic support leg according to claim 1, wherein the inner support member (43) comprises a conical section having a conical shape, the outer wall of the conical section having an outer conical inclined surface, the tightening member (44) comprising at least two mutually independent inner support blocks, the inner wall of the inner support blocks having an inner conical inclined surface, the outer conical inclined surface cooperating with the inner conical inclined surface.

3. The telescopic support leg according to claim 1, wherein the outer wall of the bracing member (44) is provided with a mounting groove (441), and an elastic member (45) elastically supported between the bracing member (44) and the outer wall of the front leg tube (1) is provided in the mounting groove (441).

4. The telescopic support leg according to claim 1, characterized in that the inner wall of the limit disk (42) is provided with an annular groove (421), and the tightening member (44) is provided with a buckle (442) extending into the annular groove (421); the buckle (442) is matched with the groove side wall of the annular groove (421) to realize relative axial fixation with the limiting disc (42).

5. The telescopic support leg according to claim 1, wherein the inner stay (43) further comprises a cylindrical section extending into the middle leg tube (2) and fixedly connected to the middle leg tube (2).

6. The telescopic support leg according to claim 1, wherein a limit turntable (46) is fixedly connected to the periphery of the lower end of the movable tube (41), an annular limit groove (461) is formed in the periphery of the limit turntable (46), an inner tube connecting piece (53) is connected to the upper end of the inner tube (51), and a limit block (531) extending into the annular limit groove (461) to be axially fixed relative to the limit turntable (46) is arranged on the inner tube connecting piece (53).

7. The telescopic support leg according to claim 1, wherein the outer wall of the lower end of the inner tube (51) is fixedly connected with a locking sleeve (54), the inner wall of the locking sleeve (54) is provided with an inner inclined guide surface, the outer wall of the elastic sleeve (52) is provided with an outer inclined guide surface, and the inner inclined guide surface is matched with the outer inclined guide surface.

8. The telescopic support leg according to claim 1, wherein the outer wall of the elastic sleeve (52) is provided with an annular clamping groove (521), the outer wall of the lower end of the middle leg pipe (2) is fixedly connected with a connecting sleeve (55), the inner wall of the lower end of the connecting sleeve (55) is provided with a clamping block (551) extending into the annular clamping groove (521), and the clamping block (551) is matched with the groove side wall of the annular clamping groove (521) to realize relative axial fixation with the elastic sleeve (52).

9. The telescoping support leg as in claim 1, wherein said elastomeric sleeve (52) has a notch in a sidewall thereof extending from a sidewall intermediate portion to a sidewall end portion of said elastomeric sleeve (52).

10. The telescopic support leg according to claim 1, characterized in that a first slip prevention assembly is arranged between the front leg tube (1) and the middle leg tube (2), a second slip prevention assembly is arranged between the middle leg tube (2) and the inner tube (51), and a third slip prevention assembly is arranged between the inner tube (51) and the rear leg tube (3).