Telescopic tube with adjustment memory function

Abstract

A telescopic tube is disclosed. By pressing and rotating a switching button, an abutting section is aligned to a first hole of an outer tube and then elastically pushed by an elastic member, a pin section of the switching button is released from engagement with a fastening hole of the inner tube, and the position of the inner tube in the outer tube can be adjusted individually. After the inner tube is adjusted completely and the switching button is pressed to rotated again, the pin section is inserted into the fastening hole, the engaging section is engaged in the first hole. When the switching button is pressed, the movement of the inner tube makes the switching button release from the first hole and the third hole, and the inner tube, the control assembly and the inner mounting member are retractable in the through hole of the outer tube.

What is claimed is: 
     
         1 . A telescopic tube with an adjustment memory function, comprising:
 an outer tube having a through hole passing through two opposite ends thereof and having a small diameter hole and a large diameter hole formed on an end surface thereof and in communication with the through hole, and a stop member disposed thereon and correspondingly in position to the large diameter hole of the outer tube, wherein the stop member as a limit hole formed correspondingly in position to and in communication with the large diameter hole and the limit hole has a small hole section and a large hole section, the large hole section is stacked on the large diameter hole, and the small hole section is disposed on a surface of the stop member;   an inner tube inserted in the through hole and telescopically movable and rotatable relative to the outer tube, wherein the inner tube has a plurality of fastening holes formed on an outer wall surface thereof;   an inner mounting member mounted in the through hole and on the outer wall of the inner tube, and having a second hole, wherein a hole diameter of the second hole is larger than that of the small diameter hole and smaller than that of the large diameter hole;   a control assembly mounted in the through hole disposed between the outer walls of the outer tube and the inner tube, and comprising a switching button and an elastic member, wherein the switching button comprises an engaging section, an abutting section and a pin section, the engaging section is connected to a top surface of the abutting section, and the pin section is connected to a bottom surface of the abutting section, the elastic member is mounted on the pin section, and an end of the elastic member is elastically abutted with the abutting section, other end of the elastic member is elastically abutted with the outer surface of the inner tube;   wherein in a condition that the switching button is pressed and the inner tube is controlled to retract and rotate relative to the outer tube, when the switching button is moved to correspond in position to the small diameter hole, the engaging section is exposed out of the small diameter hole and the abutting section is abutted with the hole wall of the through hole, the pin section is inserted into any one of the plurality of fastening holes of the inner tube to form a restraining status;   wherein when the switching button is pressed in the restraining status, the inner mounting member is adjusted and driven to retract and move in the through hole; wherein when the switching button is pressed and the inner tube is rotated at the same time, the switching button is moved to correspond in position to the large diameter hole, the pin section is released from engagement with the fastening hole, and the engaging section is inserted out of the small hole section of the stop member, the abutting section is attached to the stop member and located on the large hole section, so as to individually adjust the retracting position of the outer tube relative to the inner tube.   
     
     
         2 . The telescopic tube with adjustment memory function according to  claim 1 , further comprising an outer mounting member mounted on an end of the outer tube, wherein the inner tube passes through the outer mounting member, and the outer mounting member is configured to block the through hole. 
     
     
         3 . The telescopic tube according to  claim 2 , wherein the abutting section has an annular fastening groove annularly recessed on an end thereof connected to the pin section, and the end of the elastic member is engaged in the annular fastening groove. 
     
     
         4 . The telescopic tube according to  claim 3 , further comprising an inner bottom sleeve and a screw, wherein the inner bottom sleeve is mounted on opposite end, which is exposed out of the outer mounting member, of the inner tube, wherein the inner bottom sleeve is slidable in the through hole of the outer tube, the screw is inserted into the inner bottom sleeve and locked with the inner tube, and the stop member comprises a fastening pin disposed thereon and correspondingly in position to the engaging hole of the outer tube, and the fastening pin is inserted into the engaging hole to fasten and assemble the stop member with the outer tube.