# US 2025/0375652 A1 · Rotary Positioning Dumbbell Combination Structure and Dumbbell

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- Number: US 2025/0375652 A1
- Document ID: US20250375652A1
- Status: Published application
- Kind: A1
- Application number: 18/768,227
- Filed: 2024-07-10
- Published: 2025-12-11
- Earliest claimed: 2024-06-11
- Assignees: Xinjiashang (Dezhou) Fitness Technology Co., Ltd.
- Applicants: Xinjiashang (Dezhou) Fitness Technology Co., Ltd.
- Inventors: Chun JIANG; Shangwei CHEN; Yong JIANG
- Web page: https://patentgrep.com/patent/US20250375652A1

## CPC

- A63B 21/0726: {Dumb bells, i.e. with a central bar to be held by a single hand, and with weights at the ends}
- A63B 21/0728: {with means for fixing weights on bars, i.e. fixing olympic discs or bumper plates on bar-bells or dumb-bells}
- A63B 21/075: with variable weights {, e.g. weight systems with weight selecting means for bar-bells or dumb-bells}
- A63B 21/4049: {Rotational movement}
- A63B: APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT (apparatus for passive exercising, massage A61H)

## Abstract

The present disclosure relates to a rotary positioning dumbbell combination structure and a dumbbell adopting the combination structure, and the rotary positioning dumbbell combination structure comprises at least one dumbbell plate body, and at least one of at least one radial protrusion or at least one radial groove is arranged on left and right sides of the at least one dumbbell plate body; at least one radial groove and at least one radial protrusion are matched; the at least one positioning protrusion is provided in the at least one radial groove; at least one radial elastic sheet is provided on the at least one radial protrusion; and the at least one positioning groove is provided on the at least one radial elastic sheet at a position facing the at least one positioning protrusion.

## Claims

### Claim 1

A rotary positioning dumbbell combination structure, comprising at least one dumbbell plate body, and at least one of at least one radial protrusion or at least one radial groove is arranged on left and right sides of the at least one dumbbell plate body;
the at least one radial groove and the at least one radial protrusion are matched; at least two axial blocking plates at groove end are uniformly arranged on at least one outer end surface of the at least one radial groove; at least one internal insertion groove is arranged at inner sides of the axial blocking plates at groove end; at least two axial blocking plates at protrusion end are uniformly distributed on the at least one outer end surface of the at least one radial protrusion; and at least one external insertion groove is provided on inner sides of the axial blocking plates at protrusion end; and
at least one positioning protrusion is provided in the at least one radial groove; at least one radial elastic sheet is provided on the at least one radial protrusion; at least one positioning groove is provided on the at least one radial elastic sheet at a position facing the at least one positioning protrusion; and at least one first anti-dropping protrusion and at least one second anti-dropping protrusion are respectively provided on the left and right sides of the at least one positioning groove.

### Claim 2 (depends on 1)

The rotary positioning dumbbell combination structure according to claim 1, wherein at least one fixing frame is provided in the at least one dumbbell plate body; at least one elastic component is radially fixed in the at least one fixing frame; and at least one end of the at least one elastic component contacts with the at least one radial elastic sheet and exerts force on the at least one radial elastic sheet.

### Claim 3 (depends on 1)

The rotary positioning dumbbell combination structure according to claim 1, wherein the at least one radial elastic sheet is designed integrally with the at least one radial protrusion; at least one blocking part is provided on the at least one side panel provided with the at least one radial protrusion; and an outer side of the at least one radial elastic sheet is limited by the at least one blocking part.

### Claim 4 (depends on 1)

The rotary positioning dumbbell combination structure according to claim 1, wherein at least one positioning gap is arranged between the at least one positioning protrusion and the axial blocking plates at groove end; and the at least one positioning gap is clamped and matched with the at least one first anti-dropping protrusion at an edge of the at least one positioning groove.

### Claim 5 (depends on 1)

The rotary positioning dumbbell combination structure according to claim 1, wherein at least one inner radial blocking plate is arranged at at least one end of the at least one internal insertion groove.

### Claim 6 (depends on 1)

The rotary positioning dumbbell combination structure according to claim 1, wherein at least one outer radial blocking plate is provided on at at least one end of the at least one external insertion groove.

### Claim 7 (depends on 1)

A dumbbell, characterized in that joints between middle dumbbell plate bodies, inner dumbbell plate bodies and end dumbbell plates bodies adopt the rotary positioning dumbbell combination structure according claim 1.