Abstract: An electronic device includes a housing, a button structure, a switch, and a water-proof adhesive. The housing has an opening. The button structure is disposed at the opening and includes a button body and an elastic body. The button body is exposed from the opening. The elastic body and the button body is integrally formed as a single component. The elastic body is configured to provide the button body with a recovery force when being pressed. The switch is disposed relative to a position of the button body and is electrically coupled to a circuit board to generate a switching signal when the button body is pressed. The water-proof adhesive is disposed between an inner surface of the housing and the elastic body, and surrounds the opening.

Abstract: A distance measuring device includes a housing having a distance meter, a measuring wheel having a wheel axle rotatably engaged into the housing and coupled to the distance meter. A brake wheel is disposed on the wheel axle. A brake arm is pivotally secured in the housing and movable to engage with the brake wheel for braking the brake wheel. A pole includes a foldable structure, a handle is disposed on top of the pole, a brake lever and a handgrip are pivotally secured to the handle and extended out of the handle for being actuated by users, and coupled to the brake arm and the distance meter with flexible brake cable and a flexible wire, which allow the segments of the pole to be folded relative to each other.