Swivel chair device having ascending and descending function

Abstract

A swivel chair device having an ascending and descending function. The swivel chair device comprises a support pipe (1), a shaft sleeve (5), a spline pipe (6) and a telescopic cylinder (7). The shaft sleeve (5) is fixedly arranged in the support pipe (1). The spline pipe (6) is arranged in the support pipe (1), the bottom end of the spline pipe (6) being higher than the bottom end of the support pipe (1), and the top end of the spline pipe (6) being fixedly connected to the shaft sleeve (5) so as to be connected to the support pipe (1) to form a non-rotating body. A rotary reset mechanism, which elastically connects the telescopic cylinder (7) to the spline pipe (6) for driving the telescopic cylinder (7) that has been rotated at any angle to be automatically reset, is further arranged in the spline pipe (6).

What is claimed is: 
     
         1 . A swivel chair device having ascending and descending function, comprising:
 a support pipe ( 1 ),   a shaft sleeve ( 5 ),   a spline pipe ( 6 ), and   a telescopic cylinder ( 7 ), wherein the shaft sleeve ( 5 ) is fixedly arranged in the support pipe ( 1 ), wherein the spline pipe ( 6 ) is arranged in the support pipe ( 1 ), wherein a bottom end of the spline pipe ( 6 ) is higher than a bottom end of the support pipe ( 1 ), wherein a top end of the spline pipe ( 6 ) is fixedly connected to the shaft sleeve ( 5 ) so as to be connected to the support pipe ( 1 ) to form a non-rotating body, wherein the telescopic cylinder ( 7 ) is arranged in the spline pipe ( 1 ), wherein the cylinder body of the telescopic cylinder ( 7 ) is rotatably connected to the shaft sleeve ( 5 ) in an ascending and descending mode, wherein an ascending and descending shaft ( 7 . 2 ) of the telescopic cylinder ( 7 ) vertically passes through the lower portion of the spline pipe ( 6 ), and wherein a rotary reset mechanism, which elastically connects the telescopic cylinder ( 7 ) to the spline pipe ( 6 ) for driving the telescopic cylinder ( 7 ) that has been rotated at any angle to be automatically reset, is further arranged in the spline pipe ( 6 ).   
     
     
         2 . The swivel chair device having ascending and descending function of  claim 1 , wherein the shaft sleeve ( 5 ) is connected to a top end of the support pipe ( 1 ) in a hanging mode through an outer fold ring ( 5 . 1 ) arranged at the top of the shaft sleeve ( 5 ) and is fixedly connected to a side wall of the support pipe ( 1 ) through a pin ( 9 ). 
     
     
         3 . The swivel chair device having ascending and descending function of  claim 1 , wherein the internal splines of the spline pipe ( 6 ) are engaged with the external splines arranged at the bottom of the shaft sleeve ( 5 ). 
     
     
         4 . The swivel chair device having ascending and descending function of  claim 1 , wherein the telescopic cylinder ( 7 ) is movably hung in a sleeve cavity formed in the top of the shaft sleeve ( 5 ) through a convex rib ring ( 7 . 11 ) arranged on an outer wall of a cylinder body ( 7 . 1 ). 
     
     
         5 . The swivel chair device having ascending and descending function of  claim 1 , wherein the rotary reset mechanism comprises:
 a reset pipe ( 10 ), a driving pipe ( 11 ), a pipe sleeve ( 12 ) and a spring ( 13 ), wherein the reset pipe ( 10 ) is fixed to the exposed portion of the ascending and descending shaft ( 7 . 2 ) of the telescopic cylinder ( 7 ) in a sleeving mode, wherein the pipe wall of the reset pipe ( 10 ) is longitudinally provided with a through hole having a closed upper end and a lower end passing through a bottom end of the reset pipe ( 10 ), wherein the driving pipe ( 11 ) is movably arranged in the reset pipe ( 10 ), wherein an outer wall of the driving pipe ( 11 ) is provided with a transverse shaft ( 11 . 1 ) that is exposed outside the through hole ( 10 . 1 ) and capable of moving up and down along the through hole ( 10 . 1 ), wherein the transverse shaft ( 11 . 1 ) is provided with a ball bearing ( 17 ) capable of rolling circumferentially along an inclined bottom surface of the pipe sleeve ( 12 ), wherein the pipe sleeve ( 12 ) is movably sleeved on the periphery of the reset pipe ( 10 ) and is in contact with the ball bearing ( 17 ) through the inclined bottom surface of the pipe sleeve ( 12 ), thereby enabling the ball bearing ( 17 ) to roll along the circumferential direction of the inclined bottom surface, wherein the outer splines of the pipe sleeve ( 12 ) are further engaged with the internal splines of the spline pipe, so that the pipe sleeve ( 12 ) is longitudinally movable but fixedly connected to the spline pipe ( 6 ) in the circumferential direction, wherein the spring ( 13 ) is arranged in the reset pipe ( 10 ) below the driving pipe ( 11 ) and elastically supports the driving pipe ( 11 ) upwards, thereby propelling the ball bearing ( 17 ) to clamp into a high point of the inclined bottom surface of the pipe sleeve ( 12 ), and wherein in this way, the reset pipe ( 10 ) at any angle is propelled to automatically reset, thereby propelling the telescopic cylinder ( 7 ) to automatically reset.   
     
     
         6 . The swivel chair device having ascending and descending function of  claim 5 , wherein the outer wall of the driving pipe ( 11 ) below the transverse shaft ( 11 . 1 ) is provided with a convex plate ( 11 . 2 ) movably penetrating out from the through hole ( 10 . 1 ), wherein the convex plate ( 11 . 2 ) is provided with a reinforcing rod ( 14 ) for improving the structural strength of the transverse shaft ( 11 . 1 ), wherein the reinforcing rod ( 14 ) is a vertically arranged flat rod, wherein a wide surface of the reinforcing rod ( 14 ) is flatly attached to an outer end surface of the convex plate ( 11 . 2 ) and is fixedly connected to the convex plate ( 11 . 2 ) through a first screw ( 15 ), wherein the bottom of the reinforcing rod ( 14 ) is clamped in a clamping groove ( 11 . 2 ) formed in the outer end surface of the convex plate ( 11 . 2 ) through a clamping head ( 14 . 1 ) arranged at a bottom end of the reinforcing rod ( 14 ), and wherein the top of the reinforcing rod ( 14 ) is fixedly connected to an outer end surface of the transverse shaft ( 11 . 1 ) through a second screw ( 16 ), so that the transverse shaft ( 11 . 1 ) and the convex plate ( 11 . 2 ) are fixedly connected into a whole. 
     
     
         7 . The swivel chair device having ascending and descending function of  claim 5 , wherein a top end of the spring ( 13 ) extends into the interior of the driving pipe ( 11 ) and supports an inner top wall of the driving pipe ( 11 ), wherein a bottom end of the spring ( 13 ) abuts against a spring support member ( 19 ) arranged at the bottom of the reset pipe ( 10 ), and wherein the spring support member ( 19 ) is an end cover, which is welded to a bottom end of the reset pipe ( 10 ) for sealing the reset pipe ( 10 ) and a bottom opening of the through hole ( 10 . 1 ). 
     
     
         8 . The swivel chair device having ascending and descending function of  claim 1 , wherein the support pipe ( 1 ) is vertically fixedly mounted on the base ( 2 ), wherein a support block ( 8 ) is arranged in the support pipe ( 1 ) below the spline pipe ( 6 ), wherein the supporting block ( 8 ) is spaced from the base ( 2 ) and is fixedly connected to the base ( 2 ), wherein a bottom end of the ascending and descending shaft ( 7 . 2 ) of the telescopic cylinder ( 7 ) is movably arranged in a central hole of the support block ( 8 ), and wherein the ascending and descending shaft ( 7 . 2 ) is movably connected to the support block ( 8 ) by means of a stop block ( 20 ) and a stop piece ( 21 ) arranged above and below the support block ( 8 ), so that the cylinder body ( 7 . 1 ) of the telescopic cylinder ( 7 ) is rotatably connected to the base ( 2 ) in an ascending and descending mode. 
     
     
         9 . The swivel chair device having ascending and descending function of  claim 1 , wherein the swivel chair further comprises an outer pipe ( 3 ) and a seat plate ( 4 ) fixedly mounted at the top of the outer pipe ( 3 ), wherein the outer pipe ( 3 ) is movably sleeved on the support pipe ( 1 ) from above, wherein the seat plate ( 4 ) is fixedly connected to the top of the cylinder body of the telescopic cylinder ( 7 ), and wherein the top of the telescopic cylinder ( 7 ) is further provided with a control rod ( 7 . 3 ) that is exposed outside the outer pipe ( 3 ) and is rotatably connected to the outer pipe ( 3 ). 
     
     
         10 . The swivel chair device having ascending and descending function of  claim 9 , wherein a seat ( 22 ) is arranged on a top surface of the seat plate ( 4 ).