| 摘要 |
An angle control device of a bowling wrist protector is provided to adjust the vertical angle of a back of hand support plate easily by pushing a pushing rod, and to sustain the back of hand support plate firmly. A connection tool(20) having a holding recess(21) is attached to the back of hand support plate(14). A case having an ascending/descending recess(23'), a through-hole(24) and a control checking hole(25) is attached to a middle plate(12). A sliding operation tool having a display protrusion(28), an outer holding tooth(27) and a connection hole(29) is built in the case(22). The display protrusion is guided in the control checking hole(25). A holding recess of the connection tool(20) is connected to the connection hole(29) of the sliding operation tool.
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