Resin connector connection structure and method of manufacturing the same

A resin connector connection structure (1, 2, 3, 4) comprising:

• a resin connector (10, 60, 90) which has a tubular shape, and to both opening end sides of the resin connector being configured to connect connection target members (20, 30, 70, 80);
• and
• a pipe (30) which constitutes another one of the connection target members, the pipe having an annular flange (31), and the pipe (30) being fitted to a second opening side of the resin connector (10, 60, 90),
• a resin tube (20, 70, 80) which constitutes one of the connection target members, in the resin tube having a tubular shape, and the resin tube being fitted to a first opening side of the resin connector,
• wherein the resin connector includes:
• a connector main body portion (11, 51, 61, 91) which has a tubular shape and a locking claw (11a), the connector main body being formed of a main portion base material resin that contains a reinforcing filler, and
• a connector end portion (12, 52, 62, 63, 93, 94) which has a tubular shape, the connector end portion being formed of an end portion base material resin that (i) does not contain the reinforcing filler or (ii) contains the reinforcing filler at a lower proportion than the connector main body portion, and the connector end portion being directly or indirectly joined to the connector main body portion such that the connector end portion constitutes an end portion of the resin connector on the first opening side, and
• wherein the resin tube is formed of a material having a higher absorption rate of a laser beam than the connector end portion, and the resin tube is fitted to the connector end portion to be welded to an inner peripheral surface or an outer peripheral surface of the connector end portion and to be welded at a position other than an axial position at which the connector main body portion is positioned in the resin connector,
• the locking claw (11a) is elastically deformable to allow the pipe (30) to be inserted and being locked to the annular flange (31) of the pipe (30).