Portable muscle strength measuring instrument

The utility model discloses a portable muscle strength measuring instrument which comprises a shell, a pressure testing assembly used for testing muscle tension and a displacement testing assembly which is synchronous with the pressure testing assembly and used for testing displacement. The pressure testing assembly comprises a pressing rod, a pressure sensor matched with the inner end face of the pressing rod is installed in the shell, and the outer end of the pressing rod is pressed on the skin. The displacement testing assembly comprises a displacement sensor and a movable sleeve, the outer end face of the movable sleeve is flush with the outer end face of the pressing rod, a reset spring is arranged on the pressing rod at the inner end of the movable sleeve, a shifting rod matched with the displacement sensor is arranged on the side wall of the movable sleeve, and a limiting assembly is arranged between the pressing rod and the movable sleeve. According to the utility model, the pressure sensor and the di