Applicator with rotary cam piston mechanism

An applicator for discharging applied liquid by turning of a rotating operating portion attached to a barrel main body, the applicator comprising:

• the barrel main body in which an applied liquid reservoir portion for storing the applied liquid is provided;
• the rotating operating portion provided in front of the barrel main body to be able to turn with respect to the barrel main body;
• a piston which is slid in a front-back direction of the barrel main body by turning the rotating operating portion;
• a cam mechanism portion, comprising a cam formed on the piston and a cam groove formed on the rotating operating portion, the applied liquid being discharged by operation of the cam mechanism portion,
• a through hole provided in the piston;
• an applied liquid feed path communicating with the through hole in the piston to feed the applied liquid to an applicator portion;
• a first valve for opening and closing the through hole provided in the piston, the applied liquid being discharged through the first valve and the applied liquid feed path;
• a through hole formed in the rotating operating portion, communicating with the through hole provided in the piston;
• and
• a spring for biasing the first valve in such a direction as to close the through hole provided in the piston;
• wherein the applied liquid is discharged by turning the rotating operating portion and sliding the piston in the front-back direction by use of the cam mechanism portion, and
• wherein a first end portion of the spring is engaged in the rotating operating portion and a second end portion of the spring being engaged in the first valve.