Connector

A connector to be connected to a low-pressure pipe through which low-pressure fuel supplied from a low-pressure pump flows, in a fuel supply system in which the low-pressure fuel is pressurized by a high-pressure pump and high-pressure fuel is supplied to an internal combustion engine, the connector comprising:

• a connector body formed in a tubular shape, the connector body including a small-diameter tube portion and a large-diameter tube portion;
• and
• a valve body stored inside the connector body, the valve body being configured to, when the high-pressure fuel does not flow back, come into a first state in which a forward flow path is formed between the valve body and an inner circumferential surface of the connector body by a pressure of the low-pressure fuel, and when the high-pressure fuel flows back, come into a second state in which an orifice flow path having a smaller flow path sectional area than the forward flow path is formed between the valve body and the inner circumferential surface of the connector body, wherein:
• the valve body includes:
• a valve main body portion configured to form the forward flow path and the orifice flow path between the valve main body portion and the inner circumferential surface of the connector body;
• a first restriction portion formed integrally with the valve main body portion and configured to restrict a posture of the valve body relative to the connector body by coming into contact with the inner circumferential surface of the connector body, the restriction portion including a plurality of first claw-shaped portions;
• and
• a second restriction portion formed integrally with the valve main body portion on a side opposite the first restriction portion, the second restriction portion including a plurality of second claw-shape portions,
• the first restriction portion is a small-diameter restriction portion and the second restriction portion is a large-diameter restriction portion having a larger diameter than the small-diameter restriction portion,
• the second restriction portion is configured to be contactable with an inner circumferential surface of the large-diameter tube portion to thereby restrict an attitude of the valve body relative to the connector body, and
• the first restriction portion is configured to be contactable with an inner circumferential surface of the small-diameter tube portion to thereby restrict the attitude of the valve body relative to the connector body.