Vibration plates

A bone conduction earphone, comprising a housing structure, a magnetic circuit structure, and a vibration plate, wherein

• the housing structure has an accommodating space, wherein the magnetic circuit structure and the vibration plate are located within the accommodating space;
• and
• a ring structure of the vibration plate is circumferentially connected with an inner wall of the housing structure, wherein the magnetic circuit structure is connected with a vibrating member of the vibration plate, wherein
• the vibration plate includes:
• a ring structure, a central region of the ring structure being a hollow-out region,
• a vibrating member, configured to be connected to a magnetic circuit system, the vibrating member being located in the hollow-out region of the ring structure, and
• one or more rods, configured to connect the ring structure to the vibrating member, when the vibrating member vibrates in a direction perpendicular to a plane in which the vibrating member is located, a difference between a maximum displacement value of a surface of the vibrating member and a minimum displacement value of the surface of the vibrating member is less than 0.3 mm in the direction perpendicular to the plane in which the vibrating member is located.