Weight-adjustable Dumbbell

Abstract

A weight-adjustable dumbbell, includes a dumbbell frame, a plurality of hanging piece components and dumbbell pieces matching with the hanging piece components, wherein a rotating rod is provided on the dumbbell frame's middle position, and the hanging piece components are arranged symmetrically on both ends of the dumbbell frame. The hanging piece components on the same end are arranged at intervals and in linkage connection with each other. Two hanging piece components, which are on both ends and close to the dumbbell frame's middle position, are in linkage connection with the rotating rod. The hanging piece component includes a gear shaft and a limiting structure. The rotating rod is provided with clamping blocks on its both ends. One side of the gear shaft is provided with slots, which cooperate with the clamping blocks to realize the interaction between the rotating rod and the gear shaft.

1 . A weight-adjustable dumbbell, comprises a dumbbell frame, a plurality of hanging piece components and dumbbell pieces matching with the hanging piece components,
 wherein a rotating rod is provided on a middle position of the dumbbell frame, and the plurality of hanging piece components are arranged symmetrically on both ends of the dumbbell frame; several hanging piece components on the same end of the dumbbell frame are arranged at intervals and in linkage connection with each other; the two hanging piece components that are on both ends and close to the middle of the dumbbell frame are in linkage connection with the rotating rod;   wherein each hanging piece component includes a gear shaft and a limiting structure; the rotating rod is provided with clamping blocks on its both ends; one side of the gear shaft is provided with slots, which cooperate with the clamping blocks to realize the interaction between the rotating rod and the gear shaft; the limiting structure cooperates with the gear shaft to limit the movement of the dumbbell piece.   
     
     
         2 . The weight-adjustable dumbbell according to  claim 1 , wherein the limiting structure comprises a driven gear, a first shell and a second shell, and a cavity is formed when the first shell and the second shell are connected; the gear shaft and the driven gear are arranged inside the cavity, and the driven gear is engaged with the gear shaft; the limiting structure includes protrusion blocks and plug-in slots, wherein the protrusion blocks are arranged in an inner side of the first shell, and the plug-in slots are arranged on one side of the driven gear facing to the first shell; the driven gear rotates relatively to the first shell to enable the insertion or separation between the plug-in slots and the protrusion blocks; one side of the driven gear close to the second shell is provided with a limiting column and an elastic element is arranged on an outer periphery of the limiting column; the second shell is provided with second through-holes for the limiting columns to pass through; the dumbbell piece is provided with limiting holes matching with the limiting columns. 
     
     
         3 . The weight-adjustable dumbbell according to  claim 2 , wherein the plug-in slot is provided with a first guide slope and the protrusion block is provided with a second guide slope matching with the first guide slope. 
     
     
         4 . The weight-adjustable dumbbell according to  claim 1 , wherein a first through-hole is provided on a middle position of the dumbbell piece and a gap is arranged on one side of the dumbbell piece; the gap is communicated with the first through-hole and a chute is arranged on both sides of the gap; the hanging piece component is arranged in the chute and slides along the gap to an external environment of the dumbbell piece. 
     
     
         5 . The weight-adjustable dumbbell according to  claim 1 , wherein the dumbbell frame comprises a fixing frame and a center shaft, and the fixing frame includes a front baffle, a rear baffle and a connecting plate; the hanging piece component is arranged out of the center shaft and between the front baffle and the rear baffle; the rear baffle is fixedly connected with the center shaft and both ends of the connecting plate are respectively connected with the front baffle and the rear baffle. 
     
     
         6 . The weight-adjustable dumbbell according to  claim 5 , wherein one side of the connecting plate close to the front baffle is provided with an identification block, and the front baffle is provided with a fixing hole matching with the identification block; the identification block is inserted into the fixing hole. 
     
     
         7 . The weight-adjustable dumbbell according to  claim 5 , wherein the dumbbell frame further comprises a gear assembly, which is arranged on both ends of the rotating rod and forms a linkage connection with the rotating rod; one side of the front baffle close to the gear assembly is provided with a positioning slot, wherein a first spring and a positioning bead are arranged in the positioning slot; multiple positioning holes are arranged at intervals in a circumferential direction on one side of the gear assembly close to the front baffle, and the positioning bead penetrates out along the positioning hole. 
     
     
         8 . The weight-adjustable dumbbell according to  claim 7 , wherein the dumbbell further comprises a base; a locking groove is arranged on bottom of the front baffle, and a locking block is arranged inside the locking groove; the locking block is connected with the top of the locking groove through the second spring, and the locking block is provided with an avoidance groove in its middle part; a plurality of fixing blocks are arranged at intervals in a circumferential direction on one side of the gear assembly facing to the front baffle, and a protrusion structure matching with the locking block is arranged on the base. 
     
     
         9 . The weight-adjustable dumbbell according to  claim 8 , wherein one side of the gear assembly away from the front baffle is evenly divided into several dials; the amount of the positioning holes is same as the amount of the dials, and the amount of the fixing blocks is same as the amount of the dials. 
     
     
         10 . The weight-adjustable dumbbell according to  claim 1 , wherein an anti-slip sleeve is arranged on an outer periphery of the rotating rod and the anti-slip sleeve is provided with an anti-slip pattern on its outer periphery.