Connector for stick

Abstract

The present invention proposes a locking mechanism for poles. The locking mechanism includes a support rod, inserted into a first unit shaft at a first end thereof and locked to a second unit shaft at a second end thereof, with threads formed around the outer circumferential surface thereof; and a pressure locking unit movably engaged with the threads of the support rod and having longitudinal slits formed to open in one direction and at least two pressure parts formed in a longitudinal direction. The locking pressure of the pressure locking unit is imposed on the unit shafts at multiple longitudinally spaced points, thus dispersing or distributing the locking strength in the longitudinal direction and increasing both the locking strength and the resistance against both longitudinal compressive force and longitudinal tensile force, thereby preventing the locked unit shafts from suddenly slipping towards each other.

1 . A locking mechanism for poles, comprising:
 a support rod inserted into a first unit shaft at a first end thereof and locked to a second unit shaft at a second end thereof, with threads formed around part of an outer circumferential surface of the support rod; and   a pressure locking unit movably engaged with the threads of the support rod through screw-type engagement, with at least one pair of longitudinal slits formed in the pressure locking body such that the slits are open in one direction, and with two or more pressure parts formed in the pressure locking body in a longitudinal direction.   
     
     
         2 . The locking mechanism for poles according to  claim 1 , wherein
 the pressure locking unit comprises a pressure locking body, the pressure locking body comprising:   an annular-shaped first pressure part provided around an edge of a first end of the pressure locking body; and   an annular-shaped second pressure part formed by a pressure protrusion formed around an outer circumferential surface of the pressure locking body, and the support rod comprises a tapered shoulder part at a predetermined location near the threads,   wherein the pressure locking body is provided on an inner circumferential surface thereof with a tapered seat part so as to correspond to the tapered shoulder part of the support rod.   
     
     
         3 . The locking mechanism for poles according to  claim 1 , wherein the pressure locking unit comprises a pressure locking body having a pair of first slits and a pair of second slits, which are formed in the pressure locking body such that the first and second slits are angularly spaced apart from each other at right angles, wherein the pressure locking body comprises:
 an annular-shaped first pressure part formed around a first edge of the pressure locking body and an annular-shaped second pressure part spaced apart from the first pressure part; and   an annular-shaped third pressure part formed around a second edge of the pressure locking body and an annular-shaped fourth pressure part spaced apart from the third pressure part, wherein   the first and second slits are opened in opposite directions, the support rod is provided both with a first tapered shoulder part at a location near a first end of the threads and with a second tapered shoulder part at a location near a second end of the threads, and the pressure locking body is provided on an inner circumferential surface thereof with a tapered seat part so as to correspond to the first tapered shoulder part of the support rod.   
     
     
         4 . The locking mechanism for poles according to  claim 1 , wherein the pressure locking unit comprises:
 a first pressure locking body having both at least one pair of slits and an annular-shaped first pressure part formed around an edge of the first pressure locking body; and   a second pressure locking body having both at least one pair of slits and an annular-shaped second pressure part formed around an edge of the second pressure locking body.   
     
     
         5 . The locking mechanism for poles according to  claim 4 , wherein
 the support rod comprises: first threads formed around an outer circumferential surface of the support rod; a tapered shoulder part formed around the support rod at a location above the first threads; and second threads formed around the support rod at a location above the tapered shoulder part and having a diameter less than that of the first threads, wherein   the first pressure locking body is movably engaged with the second threads of the support rod through screw-type engagement, the support rod is provided on the second threads with a wedge part having a tapered outer circumferential surface, the first pressure locking body is provided on an inner circumferential surface thereof with a first tapered seat part so as to correspond to the tapered outer circumferential surface of the wedge part, and   the second pressure locking body is movably engaged with the first threads of the support rod through a screw-type engagement, and is provided on an inner circumferential surface thereof with a second tapered seat part so as to correspond to the tapered shoulder part of the support rod.   
     
     
         6 . The locking mechanism for poles according to  claim 1 , wherein the pressure locking unit comprises a pressure locking body, with at least one pair of first slits and at least one pair of second slits formed in upper and lower ends of the pressure locking body such that the first and second slits are open upwards and downwards, respectively, wherein
 the pressure locking body is provided with annular-shaped first and second pressure parts around upper and lower edges thereof.   
     
     
         7 . The locking mechanism for poles according to  claim 6 , wherein
 the support rod is provided with threads formed around an outer circumferential surface thereof, a tapered shoulder part formed at a location above the threads, and a wedge part formed in a lower portion of the threads and having a tapered outer circumferential surface,   the pressure locking body is movably engaged with the threads of the support rod through screw-type engagement, and is provided on a portion of the inner circumferential surface thereof having the first slits, with a first tapered seat part so as to correspond to the tapered shoulder part of the support rod, and is provided on another portion of the inner circumferential surface thereof having the second slits with a second tapered seat part so as to be in contact with the tapered shoulder part of the wedge part.   
     
     
         8 . The locking mechanism for poles according to  claim 1 , further comprising:
 an elastic member provided on a lower end of the support rod.