The invention relates to a
hardness detection device, in particular to a visual
hardness detection device for a hardware plate. The visual
hardness detection device for the hardware plate is precise in hardness detection, comprehensive in detection and visual enough in observation. In order to achieve the technical purposes, the visual hardness detection device for the hardware plate comprises a bottom plate, a second sliding rail, a rack, a fulcrum rod, a top support, a third connecting rod, a first sliding rail, a first sliding block, a containing plate, a special-shaped block, a contact wheel, a spring, a lifting rod, a second hammer, a guide plate, a second sliding block, a sector gear, a motor, a first connecting rod, a cylinder body, a first
piston, a second
piston, a second connecting rod and a first hammer. The effects of being precise in hardness detection, comprehensive in detection and visual enough in observation are achieved, and due to the fact that the device is high in detection speed, reasonable in design and convenient and rapid to use, the device is high in practicality.