Pneumatic hand tool with adjustable operating angle

A pneumatic hand tool with adjustable operating angle, comprising:

• a grip body, formed along a linear axial direction, the two ends of said grip body respectively have a grip joint and an air inlet to introduce high pressure air, said grip joint is formed with a grip air transmission port, said grip body has a grip flow channel inside it to guide high pressure air, said grip flow channel is communicated between said air inlet and the grip air transmission port;
• a tool head body, with its two ends respectively having a tool head joint and a driving head to output motion power, said tool head joint is formed with a tool head air intake, inside, said tool head body further has a pneumatic driver and a tool head flow channel to guide high pressure air, said tool head flow channel is communicated between said tool head air intake and an air intake of the pneumatic driver;
• a rotary connection seat, form by interconnection of a first rotary seat and a second rotary seat, wherein:
• the two ends of said first rotary seat respectively have a first joint and a first rotary joint face, said first joint is provided with a first connector, said first rotary joint face is provided with a first port, said first rotary seat further has a first flow channel inside it to guide high pressure air, said first flow channel is communicated between said first connector and said first port;
• the two ends of said second rotary seat respectively have a second joint and a second rotary joint face, said second joint is provided with a second connector, said second rotary joint face is provided with a second port, said second rotary seat further has a second flow channel inside it to guide high pressure air, said second flow channel is communicated between the second connector and said second port;
• specifically,
• said first rotary seat is connected to said grip joint of said grip body via the first joint, so that said grip flow channel is communicated with said first flow channel via the grip air transmission port and said first connector;
• said second rotary seat is connected to said tool head joint of said tool head body via the second joint, so that said tool head flow channel is communicated with said second flow channel via said tool head air intake and said second connector;
• Said first rotary joint face and said second rotary joint face have interconnecting areas arranged for uniform circumferential motion, said grip body and said tool head body are interconnected via said first rotary joint face and said second rotary joint face in a rotary manner, so that said first port on said first rotary joint face and said second port on said second rotary joint face are interconnected, and communicated to said first flow channel and said second flow channel, said first rotary joint face and second rotary joint face are tilted at an angle of inclination θ in relation to the linear axial direction.