In a DC button switch having a dustproof function and a
potentiometer output, a mechanical structural part of the switch mainly comprises a base (1), an intermediate base (2), a push shaft (4), a sealing
cushion block (5), a rubber sealing sleeve (6), a bottom cover (3) and a related structural member, the circumferential edge of a matching connection position of the base (1) and the push shaft (4) are sealed by the rubber sealing sleeve (6), and the sealing
cushion block (5) is additionally arranged and used for fixing a connection position of the sealing sleeve of the push shaft to achieve a better sealing effect and a better positioning effect; and moreover, an
electronic structure part of the switch comprises a speed regulation spring sheet (7), a circuit board (9), a waterproof terminal (10), a wire (11) and a related
electronic component, and a connection position of the waterproof terminal (10) and the bottom cover (3) are sealed by a pouring
sealant with relatively large
viscosity. With the adoption of the scheme, the dustproof and waterproof function with a relatively good sealing effect can be achieved, the protection class can reach IP67, the DC button switch is compact in structure and low in construction cost and is widely applied to a DC electric gardening tool such as a DC suction blower, a DC grass
trimmer and a DC electric
chain saw, and conforms to the national safety standard.