Aerosol tank valve joint device and aerosol tank

An aerosol tank valve joint device, comprising,

• a base,
• a knob,
• an elastic arm,
• a joint, wherein the elastic arm is provided on the base, wherein the joint is provided on the elastic arm, wherein the knob is axially positioned and is rotatably provided on the base in a circumferential direction, wherein an abutting block is provided on a side of the knob close to the joint, and wherein when the knob rotates in the circumferential direction, the abutting block is propelled to be close to and push the joint, or the abutting block is propelled to be away from the joint, such that the joint is reset under an elastic force effect of the elastic arm a middle surface of the base extends upwards to form an annular first wall body, wherein the mounting hole penetrating through two sides of the base is formed in the middle portion of the first wall body, wherein the first wall body is provided with an opening communicating with the mounting hole, wherein the knob and the joint are arranged in the mounting hole, and wherein a pipe of the joint is led out outwards through the opening, and
• wherein one side of the knob is provided with a positioning block able to be removed but unable to be restored, and wherein the positioning block is located in the opening.