Adjustable dumbbell structure

Abstract

The invention relates to an adjustable dumbbell, comprising: a base (1) with a frame (11) and two positioning units (12) disposed on both sides of the frame with two locking convex portions (13) facin

Claims

What is claimed is:

1. An adjustable dumbbell structure, comprising:a base, having a frame and two positioning units disposed on both sides of an inner wall of the frame; wherein each of the two positioning units includes a locking convex portion and the two locking convex portions face each other;a plurality of weight plate sets, detachably assembled with the locking convex portions of the positioning unit; wherein each of the plurality of weight plate sets has a first assembling portion and a second assembling portion on both sides; wherein the second assembling portion of one of the weight plate sets is movably assembled with the first assembling portion of another one of the weight plate sets; wherein some of the first assembling portions of the weight plate sets are detachably assembled with the locking convex portion of the positioning unit; wherein each of the locking convex portions and the second assembling portion includes a locking space, and the locking space includes an inlet and a side outlet; wherein each of the first assembling portions of the weight plate sets is recessed to form a first slot at the side outlet correspondingly;a plurality of latch sets, correspondingly disposed in the locking space of the locking convex portion and the locking space of the second assembling portion; wherein each of the plurality of latch sets includes an elastic member, a latch member, and a protruding pin; wherein one end of the elastic memberabuts against an inner wall of the locking space, the other end of the elastic member is sleeved on one end of the latch member, the other end of the latch member is pushed by the elastic member to protrude out of the locking space and engage with the first slot; wherein the protruding pin is disposed on one side of the latch member and corresponds to the inlet;a control piece, movably inserted in one of the locking space; wherein when the control piece inserts from the inlet into the locking space, the control piece pushes the protruding pin located in the locking space, the protruding pin abuts and drives the latch member to elastically compress the elastic member, and simultaneously releases the latch member from engaging with the first slot; anda handle set, including a handle and two connecting units respectively disposed on two ends of the handle; wherein each of the two connecting units has a connecting portion recessed on one side corresponding to the positioning unit, and the connecting portion has a second slot corresponding to the side outlet of the second assembling portion; wherein the latch member located in the second assembling portion is generally engaged in the second slot.

2. The adjustable dumbbell structure according to claim 1, wherein each of the two positioning units includes a shell piece and a blocking piece; wherein the shell piece is threadedly engaged with one side of the blocking piece and the locking convex portion is threadedly engaged with the other side of the blocking piece; wherein a temporary storage space is formed between the shell piece and the blocking piece, and the temporary storagespace has an access opening for inserting the control piece into the temporary7 storage space.

3. The adjustable dumbbell structure according to claim 2. wherein the shell piece has a first groove recessed on a side opposite to the blocking piece, and the frame is composed of two frame plates in a C-shape; wherein each of the two frame plates connects to the two first grooves of the two shell pieces correspondingly.

4. The adjustable dumbbell structure according to claim 1, wherein each of the locking convex portions includes a first piece, a second piece and a third piece, and each of the second assembling portions includes a first piece, a second piece and a third piece; wherein the first piece, the second piece and the third piece overlap to form the locking space; wherein the first piece has a receiving groove in a lateral direction, the second piece has a sliding groove in a longitudinal direction and a limiting groove recessed on one side of the sliding groove; wherein one end of the elastic member is located in the limiting groove and abuts against a bottom of the limiting groove; wherein the third piece has a pin groove allowing the protruding pin to move within the pin groove; wherein the control piece is inserted from the inlet of the locking space into the sliding groove of the second piece until it reaches the protruding pin, and the control piece pushes the protruding pin to move within the sliding groove of the third piece; wherein the protruding pin moves to lead the latch member to movetoward and compress the elastic member, and the latch member moves and releases engaging with the first slot.

5. The adjustable dumbbell structure according to claim 1. wherein each of the first assembling portions of the weight plate sets and each of the connecting portions of the connecting unit includes a main board, two front boards, and two rear boards; wherein the main board, two front boards, and two rear boards overlap to form an assembling groove; wherein the two front boards and the two rear boards are disposed on the same side of the main board, and the two rear boards are disposed between the two front boards and the main board; wherein the second assembling portion of each of the weight plate sets and the locking convex portion of each of the positioning units are movably assembled in the assembling grooves correspondingly; wherein the first slot of the first assembling portion of each of the weight plate sets is formed on one side of the front boards.

6. The adjustable dumbbell structure according to claim 1, wherein the control piece further includes a control segment, a body segment, a positioning segment, and a driving segment; wherein one end of the body segment is connected to the control segment, the other end of the body segment is connected to one end of the positioning segment, and the other end of the positioning segment is connected to the driving segment; wherein the positioning segment has an arc notch recessed corresponding to the protruding pin; wherein after the control piece pushes the protrudingpin with the driving segment, the elastic member is synchronously compressed, when the protruding pin contacts the arc notch, the compressed elastic member elastically resets and pushes the protruding pin to be engaged in the arc notch, so that the length of the latch member protruding out of the side outlet is limited.

7. The adjustable dumbbell structure according to claim 6, wherein the driving segment of the control segment has a guiding bevel corresponding to the protruding pin at the opposite end connecting to the positioning segment; wherein the protruding pin is in a cylindrical post shape, so that the driving segment pushes the protruding pin with the guiding bevel after the control piece is inserted from the inlet into the locking space with the driving segment.

8. The adjustable dumbbell structure according to claim 2, wherein each of the shell pieces has a third slot recessed corresponding to the temporary storage space and the access opening, so that when the control piece is inserted into the temporary storage space through the access opening, part of the control piece is exposed in the third slot; wherein the third slot has two third slot ribs protruding from both side walls of the third slot, and the control piece has two rib notches corresponding to the third slot ribs.s