Connector
The connector includes a housing having a first casing and a second casing; a connection member formed into a cylinder an interior of which constitutes a first flow path L 1 and arranged in the housing rotatably around an axis, a screw portion being formed on the connection portion in such a manner that the syringe can be screwed in; a flow path member arranged in the connection member; and a ratchet having a gear arranged in the connection member and having a plurality of teeth in the peripheral direction and a pawl arranged in the housing, and engaged in a protruding direction of the protrusion of the first casing from the first end surface with the restricting surface of the gear rotating in the direction of the syringe being screwed in so as to restrict the rotation of the gear.
1 . A connector for fluidically connecting a first device and a second device, the connector comprising:
a housing including a first casing that has a first end surface on which a protrusion is formed, and a second casing that has a second end surface in which a recess is formed to be engaged with the protrusion;
a connection member formed into a cylinder an interior of which constitutes a first flow path, an intermediate portion of the connection member in an axial direction being rotatably supported by the housing, one end side of the connection member being located outside the housing, a screw portion being formed on the one end side in such a manner that the first device can be screwed into the screw portion;
a flow path member formed on the other end of the connection member in such a manner as to communicate with the first flow path, an interior of the flow path member having a second flow path fluidically connected to the second device; and
a ratchet including a gear and a pawl, the gear being formed on a peripheral surface on the other end side of the connection member and having a plurality of teeth in a circumferential direction, the teeth respectively having a restricting surface and a climbing surface, and the pawl being formed on the housing and engaged in a direction orthogonal to a protruding direction of the protrusion from the first end surface with the restricting surface of the gear that rotates in the screwing direction to restrict rotation of the gear, the pawl climbing the climbing surface of the gear rotating in a direction opposite the screwing direction to allow for the rotation of the gear.
2 . The connector according to claim 1 , wherein
the housing includes a hole facing the pawl positioned in an opposing direction of the first casing, and
the hole is large enough to arrange the pawl therein in the opposing direction.
3 . The connector according to claim 2 , wherein
the hole is formed into a shape elongated in a circumferential direction of the housing, and
the pawl includes a main body arranged in the hole and extending from one end of the hole to the other end of the hole, an abutment portion arranged at a distal end of the main body and protruding toward the gear so as to abut on the teeth, and a rib arranged on the main body on an inner side of the housing and extending from one end of the main body to the abutment portion.
4 . The connector according to claim 3 , wherein
the distal end of the abutment portion is located on the gear side in a protruding direction of the abutment portion with respect to a proximal end of the main body.
5 . The connector according to claim 3 , wherein
a first outer surface of the main body exposed on an outer side of the housing is displaced to a position toward an inner side of the housing with respect to a second outer surface of the housing.
6 . The connector according to claim 5 , wherein
a displacement amount of the first outer surface with respect to the second outer surface is determined to be an amount at which the first outer surface is at a same position as the second outer surface or is located inside the housing with respect to the second outer surface when the climbing surface climbs the abutment portion.