Patent ID: 9199151
Filing Date: 2015-12-01
Classification: A63B

Abstract:
1. A punching bag, comprising: a liquid container having a top, a bottom, and a side; a gas container, having a top, a bottom, and a side, disposed in said liquid container, wherein said top of said liquid container is joined with and overlapped above said top of said gas container while said bottom of said liquid container is joined with and overlapped underneath said bottom of said gas container to define an annular interior between said side of said gas container and said side of said liquid container; a fixed-shaped ring disposed on and fixed to a top part of said liquid container to shape said to of said liquid container for preventing wrinkles thereof due to insufficient pressure on to of said liquid container; a water valve provided at said liquid container to communicate with said annular interior, wherein said water valve comprises a water inlet for allowing water to be added into said annular interior, and a sealing section sealed at said water inlet for retaining the water in said annular interior in a sealed manner; an air inflation valve provided on said top of said liquid container and coupled with said top of said gas container for filling outside air into said gas container within said liquid container so as to adjust an air pressure of said gas container for adjusting tactile feel on said liquid container, wherein when a volume of said gas container increases by increasing said air pressure therein, a volume of said liquid container is reduced and compressed; and an air exhaust valve provided on top of said liquid container for exhausting air in said annular interior when the water is sealed in said annular interior and compressed via an increase of the volume of said gas container, so as to selectively adjust a ratio between the water and air inside said annular interior, such that hardness of said punching bag is adjusted via the air of said annular interior, the air inside said gas container, and the volume of water inside said annular interior.