Telescopic support foot and support frame

1 . A telescopic support foot, comprising a plurality of telescopic assemblies, wherein the telescopic assemblies each comprise:

a first telescopic rod ( 10 ) with a first end inserted into a second end of a second telescopic rod disposed outside of the second telescopic rod ( 10 ), wherein a telescopic rod disposed inside of the telescopic rod ( 10 ) is inserted into a second end of the telescopic rod ( 10 );

a first limiting device ( 20 ) connected to the first end of the first telescopic rod ( 10 );

a second limiting device ( 30 ) connected to the second end of the second telescopic rod ( 10 ), wherein the first limiting device ( 20 ) on the first telescopic rod disposed inside of the second telescopic rod ( 10 ) abuts against the second limiting device ( 30 ) of the second telescopic rod ( 10 ) to limit separation of the first telescopic rod disposed inside of the second telescopic rod ( 10 ) from the telescopic rod ( 10 ); and

a locking device ( 40 ) arranged at the second end of the second telescopic rod ( 10 ), connected to the second limiting device ( 30 ), and configured to lock or unlock the second limiting device ( 30 ), wherein the second limiting device ( 30 ) is separated from the second end of the second telescopic rod ( 10 ) when the locking device ( 40 ) is in an unlocked state, to enable the first telescopic rod disposed inside of the second telescopic rod ( 10 ) to be separated from the telescopic rod ( 10 );

wherein the second limiting device ( 30 ) comprises a third limiting sheet ( 31 ) and a fourth limiting sheet ( 32 ) that are arranged on an inner side of the second telescopic rod ( 10 ), a first clamping head ( 311 ) and a third limiting protruding portion ( 312 ) are arranged on the third limiting sheet ( 31 ), a second clamping head ( 321 ) and a fourth limiting protruding portion ( 322 ) are arranged on the fourth limiting sheet ( 32 ), one side of the second end of the second telescopic rod ( 10 ) is provided with a first through groove ( 81 ) and a third limiting groove ( 82 ) communicating with the first through groove ( 81 ), the other side of the second end of the second telescopic rod ( 10 ) is provided with a second through groove ( 83 ) and a fourth limiting groove ( 84 ) communicating with the second through groove ( 83 ), and the locking device ( 40 ) is connected to the first clamping head ( 311 ) and the second clamping head ( 321 ) when the third limiting protruding portion ( 312 ) extends into the third limiting groove ( 82 ) through the first through groove ( 81 ) and the fourth limiting protruding portion ( 322 ) extends into the fourth limiting groove ( 84 ) through the second through groove ( 83 ), so as to limit separation of the first-telescopic rod disposed inside of the second telescopic rod ( 10 ) from the telescopic rod ( 10 ).

2 . The telescopic support foot according to claim 1 , wherein the first limiting device ( 20 ) comprises a first limiting sheet ( 21 ) and a second limiting sheet ( 22 ) that are arranged on an outer side of the telescopic rod ( 10 ), a first limiting protruding portion ( 211 ) is arranged on an inner side wall of the first limiting sheet ( 21 ), a second limiting protruding portion is arranged on an inner side wall of the second limiting sheet ( 22 ), two sides of the telescopic rod ( 10 ) are provided with a first limiting groove ( 212 ) and a second limiting groove ( 221 ) respectively, the first limiting protruding portion ( 211 ) is inserted in the first limiting groove ( 212 ), and the second limiting protruding portion is inserted in the second limiting groove ( 221 ).

3 . A support frame, comprising the telescopic support foot of claim 2 .

4 . The telescopic support foot according to claim 1 , wherein an end face of the second end of the telescopic rod ( 10 ) is provided with a fifth limiting groove ( 50 ), and the first clamping head ( 311 ) and the second clamping head ( 321 ) are movably arranged in the fifth limiting groove ( 50 ).

5 . A support frame, comprising the telescopic support foot of claim 4 .

6 . The telescopic support foot according to claim 1 , wherein the locking device ( 40 ) comprises:

a ferrule ( 41 ) sleeved at the second end of the telescopic rod ( 10 ) and provided with a sixth limiting groove ( 42 );

a first connecting rod ( 43 ) connected to two open ends of the ferrule ( 41 );

a spring ( 44 ) sleeved on the first connecting rod ( 43 ) and abutting against the two open ends of the ferrule ( 41 );

a second connecting rod ( 45 ) connected to an end of the first connecting rod ( 43 ) by means of a detachable structure ( 60 ), and

a wrench ( 46 ) rotatably connected to the second connecting rod ( 45 ), wherein the wrench ( 46 ) has a locking position and an unlocking position, and the first clamping head ( 311 ) and the second clamping head ( 321 ) extend into the sixth limiting groove ( 42 ) when the wrench ( 46 ) is at the locking position, or are separated from the sixth limiting groove ( 42 ) when the wrench ( 46 ) is at the unlocking position.

7 . The telescopic support foot according to claim 6 , wherein the detachable structure ( 60 ) is a threaded connection structure.

8 . A support frame, comprising the telescopic support foot of claim 7 .

9 . The telescopic support foot according to claim 6 , wherein an anti-slip gasket ( 70 ) is arranged between the wrench ( 46 ) and the ferrule ( 41 ).

10 . A support frame, comprising the telescopic support foot of claim 9 .

11 . A support frame, comprising the telescopic support foot of claim 6 .

12 . A support frame, comprising the telescopic support foot of claim 1 .