Electric toothbrush head and manufacturing method thereof

An electric toothbrush head, comprising:

• a connecting cavity, wherein the connecting cavity is integrally formed by injection molding, a first insertion channel is surrounded and formed by a side wall of the connecting cavity, and the first insertion channel is used for insertion of a drive shaft of an electric toothbrush;
• a connecting part;
• bristles;
• and
• a main body of toothbrush head, wherein the main body of toothbrush head is connected to the bristles;
• the main body of toothbrush head is connected to the connecting cavity through the connecting part, and the main body of toothbrush head and the connecting part are integrally formed by injection molding;
• when the main body of toothbrush head is formed by injection molding, at least one part of the main body of toothbrush head is attached to the connecting cavity to form the connecting part;
• wherein the main body of toothbrush head is provided with a first accommodating cavity and a first mounting opening, the first accommodating cavity is in communication with the first mounting opening, and is arranged farther away from an end surface of the main body of toothbrush head relative to the first mounting opening, and the first accommodating cavity is surrounded and formed by a side wall of the main body of toothbrush head;
• the connecting part is positioned on an inner surface of the first accommodating cavity, the connecting cavity is totally positioned inside the first accommodating cavity, and the connecting cavity is connected to the inner surface of the first accommodating cavity through the connecting part;
• the first mounting opening is in communication with the first insertion channel, and the first mounting opening is configured to allow part of the drive shaft of an electric toothbrush pass therethrough to extend into the first insertion channel.