Connector

1. A connector comprising:

a housing comprising:

a flow path configured to allow liquid to pass therethrough, and

a male connector connecting portion to which a male connector is connectable, the male connector connection portion comprising a substantially circular tube hole communicating with the flow path; and

a valve formed as a separate member from the housing, the valve being formed of an elastic material and adapted to block the male connector connecting portion of the housing, wherein the valve includes:

a top surface exposed from the male connector connecting portion,

a bottom surface opposite to the top surface, and

a slit opened at least on the top surface or the bottom surface,

wherein the housing includes at least one projection that protrudes upward and is configured to define an insertion length of the male connector,

wherein each of the at least one projection comprises:

an outer surface portion that faces away from a central axis of the male connector connecting portion, and

an inner surface portion that faces toward the central axis of the male connector connecting portion,

wherein the connector is configured such that:

when the male connector is not disposed in the connector, the valve does not contact the at least one projection, and

when the male connector is disposed in the connector, the male connector causes the valve to contact at least the outer surface portion of the at least one projection, and

wherein the at least one projection is located such that, when the liquid passes through the flow path of the housing, the liquid contacts at least the inner surface portion of the at least one projection.

2. The connector according to claim 1 , wherein the valve is configured such that, when the male connector is disposed in the connector, a portion of the valve is interposed between the at least one projection and the tip end of the male connector.

3. The connector according to claim 1 , wherein the valve is configured such that, when the male connector is disposed in the connector, a portion of the valve is arranged outward of the outer surface portion of the at least one projection.

4. The connector according to claim 1 , wherein the at least one projection is formed in a tapered shape with a diameter that decreases toward a top end thereof.

5. The connector according to claim 1 , wherein

the slit of the valve is linear, and

the at least one projection is arranged at a position facing a longitudinal end of the slit.

6. The connector according to claim 1 , wherein the valve includes:

a deformable portion that is displaced toward the flow path while elastically deforming when the male connector is disposed in the connector, so that an inner surface forming the slit faces the flow path of the housing and the top surface forms an opening communicating with the flow path, and

a fixing portion that protrudes at an intermediate position between the top surface and the bottom surface from an outer peripheral surface of the deformable portion and is fixed to the housing.

7. The connector according to claim 1 , wherein the housing includes:

a housing main body,

a first member joined to the housing main body and forming a base end of the male connector connecting portion, and

a second member joined to the first member and forming a tip end of the male connector connecting portion.

8. The connector according to claim 7 , wherein:

the valve includes:

a deformable portion that is displaced toward the flow path while elastically deforming when the male connector is disposed in the connector, so that an inner surface forming the slit faces the flow path of the housing and the top surface forms an opening communicating with the flow path, and

a fixing portion that protrudes at an intermediate position between the top surface and the bottom surface from an outer peripheral surface of the deformable portion and is fixed to the housing, and

the fixing portion is fixed in a fitting recess formed between a portion of the first member and a portion of the second member.

9. The connector according to claim 7 , wherein:

the first member includes:

an inner tubular portion, and

a flange portion protruding radially from the inner tubular portion, and

the flange portion is fitted to a step portion of the housing main body.

10. The connector according to claim 7 , wherein:

the second member includes a connector fitting portion configured to receive the male connector, and

the connector fitting portion includes a tapered surface on an inner surface of the connector fitting portion.

11. The connector according to claim 10 , wherein:

the second member includes an outer tubular portion having an inner diameter that is larger than an inner diameter of the connector fitting portion.

12. The connector according to claim 10 , wherein:

the second member includes an outer tubular portion, and

the connector fitting portion includes a screw portion on outer peripheral surfaces of the connector fitting portion and the outer tubular portion.

13. The connector according to claim 7 , wherein:

the second member includes an outer tubular portion,

the outer tubular portion includes an engagement portion protruding radially outward from the outer tubular portion, and

the engagement portion includes an engagement projection extending from a lower surface of the engagement portion and engaging with an engagement groove formed in the first member.

14. The connector according to claim 1 , wherein the valve includes:

an upper portion and a lower portion, the lower portion having an outer diameter that is larger than an upper diameter of the upper portion.

15. The connector according to claim 1 , wherein the valve includes a recess formed in the bottom surface of the valve.

16. The connector according to claim 1 , wherein the slit of the valve is linear, and both ends of the linear slit are formed in an arc shape.

17. The connector according to claim 1 , wherein the slit does not extend entirely through the valve in an axial direction of the valve, and a portion of the valve formed between an axial end of the slit and the flow path is configured to tear upon insertion of the male connector into the connector.

18. A method comprising:

providing a male connector;

providing a connector comprising:

a housing comprising:

a flow path configured to allow liquid to pass therethrough, and

a male connector connecting portion to which a male connector is connectable, the male connector connection portion comprising a substantially circular tube hole communicating with the flow path; and

a valve formed as a separate member from the housing, the valve being formed of an elastic material and adapted to block the male connector connecting portion of the housing, wherein the valve includes:

a top surface exposed from the male connector connecting portion;

a bottom surface opposite to the top surface; and

a slit opened at least on the top surface or the bottom surface,

wherein the housing includes at least one projection that protrudes upward and is configured to define an insertion length of the male connector,

wherein each of the at least one projection comprises:

an outer surface portion that faces away from a central axis of the male connector connecting portion, and

an inner surface portion that faces toward the central axis of the male connector connecting portion,

inserting the male connector into the connector such that the tip end of the male connector is prevented by the stopping portion from entering the flow path,

wherein:

when the male connector is not disposed in the connector, the valve does not contact the at least one projection, and

when the male connector is disposed in the connector, the male connector causes the valve to contact at least the outer surface portion of the at least one projection, and

wherein the at least one projection is located such that, when the liquid passes through the flow path of the housing, the liquid contacts at least the inner surface portion of the at least one projection.

19. The method of claim 18 , wherein, when the male connector is disposed in the connector, a portion of the valve is interposed between the at least one projection and the tip end of the male connector.