| 摘要 |
A counterweight device is mounted to a hitting trainer. The hitting trainer includes a base, an upright rod disposed on the base, and a hitting member connected to the upright rod. The counterweight device includes a counterweight bag which can be extended or compressed. When in use, the counterweight bag is fitted on the base and then the counterweight bag is pulled to unfold. Finally, external liquid is poured into the counterweight bag to increase the weight of the counterweight bag, such that the hitting trainer can be placed on the uneven ground stably. When the counterweight device is not used, the counterweight bag is detached from the hitting trainer and compressed to reduce the volume of the counterweight bag for storage and carrying. |
| 主权项 |
1. A counterweight device for a hitting trainer, the counterweight device being mounted to the hitting trainer, the hitting trainer comprising a base, an upright rod disposed on the base and a hitting member connected to the upright rod for hitting practice, the counterweight device comprising:
a counterweight bag, the counterweight bag being an annular bag, the counterweight bag having a pair of side walls, an inner annular wall and an outer annular wall, the inner annular wall and the outer annular wall being connected between the pair of side walls, the inner annular wall and the outer annular wall each having a plurality of spaced telescopic portions for the counterweight bag to be extended or compressed, the inner annular wall being configured in a circle to form a through hole in the counterweight bag, an accommodation room being defined among the pair of side walls, the inner annular wall and the outer annular wall, the accommodation room communicating with at least one opening; and wherein the counterweight bag has two openings, the two openings respectively defining a water inlet and a water outlet. |
