Electric toothbrush replacement head device

An electric toothbrush replacement head device, comprising:

• a toothbrush handle, defining a bottom hole and comprising:
• a housing, a hollow fixing column and an elastic sheet;
• wherein the hollow fixing column comprises:
• a first part and a second part connected with the first part, the second part is disposed in the housing and surrounded by the housing, and the second part defines a gap with the housing and the gap surrounds the second part;
• the elastic sheet is disposed on the first part of the hollow fixing column, and configured to abut against a shaft core of a main machine;
• and the elastic sheet comprises:
• an arc-shaped part;
• a toothbrush head, disposed on the toothbrush handle;
• wherein the toothbrush head defines a brush installation slot and an overflow slot;
• elastic sheet protrusions, disposed on the arc-shaped part of the elastic sheet;
• wherein the elastic sheet protrusions are configured to abut against a shaft core of a main machine;
• a brush component, disposed in the brush installation slot, and comprising:
• bristles and fused adhesive columns;
• wherein the bristles are connected to the fused adhesive columns though a hot melt connection process;
• an ultrasonic line, disposed in the brush installation slot and surrounding the brush component;
• wherein the overflow slot is located below the ultrasonic line;
• and
• a metal ring, disposed at a bottom of the toothbrush handle through the bottom hole, and snapped into the housing.

An electric toothbrush replacement head device, comprising:

• a toothbrush replacement head;
• wherein the toothbrush replacement head comprises:
• a toothbrush handle and a toothbrush head, a bottom of the toothbrush handle defines a bottom hole, the toothbrush head comprises a brush component, and the brush component comprises bristles;
• the toothbrush handle is provided with a hollow fixing column therein located at a lower end of the toothbrush handle, a middle part of the fixing column is provided with an elastic sheet, the elastic sheet comprises an arc-shaped part, the arc-shaped part of the elastic sheet is provided with elastic sheet protrusions thereon, and the elastic sheet protrusions are configured to be attached to a shaft core of a main machine, and a bottom of the fixing column defines a mounting hole;
• and
• wherein the toothbrush handle further comprises:
• a housing;
• the hollow fixing column comprises:
• a first part and a second part integrated with the first part, the first part is connected with the housing, the second part is disposed in the housing and surrounded by the housing, and the second part defines a gap with the housing and the gap surrounds the second part.