Connector

1. A connector comprising:

a housing;

a main flow path provided inside the housing, the main flow path being configured such that fluid is flowable from a first tube through the main flow path into a second tube; and

a connection terminal including a connection side space that is continuous with the main flow path, the connection terminal being configured such that a third tube is connectable to the connection terminal and an auxiliary flow path of the third tube communicates with the main flow path via the connection side space,

wherein the main flow path includes a main flow path side space that is continuous with at least the connection side space and is defined by:

a bottom part facing the connection side space and a pair of side parts extending from opposite sides of the bottom part toward the connection side space, and

at least one wall surface configured to direct the fluid toward the connection side space and toward the side parts,

wherein the at least one wall surface includes a top part that, when viewed from a connection terminal side of the connector, is located between the side parts,

wherein opposite ends of the at least one wall surface are coupled to the respective side parts

wherein, when viewed from the connection terminal side of the connector, the at least one wall surface extends obliquely from the top part toward the respective side parts with respect to an axial direction of the main flow path.

2. The connector according to claim 1 , wherein the at least one wall surface has a curved shape at an area at which the at least one wall surface is coupled with the bottom part.

3. The connector according to claim 1 , wherein the at least one wall surface comprises a plurality of wall surfaces that are surfaces of a rib dividing the main flow path in plan view into first and second flow paths, the wall surfaces including a first wall surface facing the first flow path and a second wall surface facing the second flow path.

4. The connector according to claim 1 , wherein each of the side parts includes a constricted portion that inwardly extends so as to gradually narrow the width of the main flow path side space.

5. The connector according to claim 1 , wherein, when viewed from the connection terminal side of the connector, the top part is located on a central axis of the main flow path.

6. A connector comprising:

a housing;

a main flow path provided inside the housing, the main flow path being configured such that fluid is flowable from a first tube through the main flow path into a second tube; and

a connection terminal including a connection side space that is continuous with the main flow path, the connection terminal being configured such that a third tube is connectable to the connection terminal and an auxiliary flow path of the third tube communicates with the main flow path via the connection side space,

wherein the main flow path includes a main flow path side space that is continuous with at least the connection side space and is defined by:

a bottom part facing the connection side space and a pair of side parts extending from opposite sides of the bottom part toward the connection side space, and

at least one wall surface configured to direct the fluid toward the connection side space and toward at least one of the side parts,

wherein the at least one wall surface is in a fixed location with respect to the first and second tubes, and, when viewed from the connection terminal side of the connector, extends obliquely with respect to an axial direction of the main flow path.

7. A connector comprising:

a housing;

a main flow path provided inside the housing, the main flow path being configured such that fluid is flowable from a first tube through the main flow path into a second tube; and

a connection terminal including a connection side space that is continuous with the main flow path, the connection terminal being configured such that a third tube is connectable to the connection terminal and an auxiliary flow path of the third tube communicates with the main flow path via the connection side space,

wherein the main flow path includes a main flow path side space that is continuous with at least the connection side space and is defined by:

a bottom part facing the connection side space and a pair of side parts extending from opposite sides of the bottom part toward the connection side space, and

at least one wall surface configured to direct the fluid toward the connection side space and toward at least one of the side parts,

wherein at least a portion of the at least one wall surface extends toward the connection terminal in a direction perpendicular to a surface of the bottom part that faces the connection side space.