Connector device and checker

1. A connector device comprising:

a fluid line component that is formed with a connecting hole, and provided with an annular mounting portion raised outwardly on an opening portion of the connecting hole, the mounting portion including an outwardly directed engaging projection of annular shape,

a connector having a connecting portion to be inserted in the connecting hole for establishing connection to the fluid line component, the connecting portion being provided with at least a pair of stop arms at diametrically symmetrical positions thereof, each of the stop arms including an engaging pawl for snap-engaging with the outwardly directed engaging projection of the mounting portion in locking relation,

a checker having a main body to be disposed on an outer circumference of the mounting portion from a lateral side thereof, and verifying portions on widthwise opposite ends of the main body so as to be located outside the stop arms, respectively, and

wherein each of the stop arms is provided with a protruding stop portion protruding outwardly, each of the verifying portions being formed so as to locate an inner surface of the verifying portion inside an outer surface of the protruding stop portion, and the inner surface of the verifying portion being formed with a verifying recessed portion for accommodating the protruding stop portion when the engaging pawl correctly engages the outwardly directed engaging projection.

2. The connector device as set forth in claim 1 , wherein the protruding stop portion is provided on an axially inner end portion of the stop arm, and the verifying recessed portion is defined in an axially inner end portion of the verifying portion.

3. The connector device as set forth in claim 1 , wherein the verifying portion is configured so as to accommodate the protruding stop portion in the verifying recessed portion while contacting with an outer surface of the stop arm.

4. The connector device as set forth in claim 1 , wherein the protruding stop portion is configured so as to be caught between the verifying recessed portion and the main body on both sides thereof.

5. The connector device as set forth in claim 1 , wherein the main body is configured so as to enter axially inside the engaging pawl that correctly engages with the outwardly directed engaging projection to support the engaging pawl.

6. The connector device as set forth in claim 1 , wherein an anti-rotation mechanism is arranged between the mounting portion and the checker for retaining the checker anti-rotationally.

7. The connector device as set forth in claim 6 , wherein the anti-rotation mechanism is configured so as to retain the checker selectively at one of a plurality of angular positions.

8. The connector device as set forth in claim 6 , wherein the anti-rotation mechanism comprises an engaging notched portion formed in either one of the outer circumference of the mounting portion or the main body of the checker, and an engaging protruding portion provided on the other of the outer circumference of the mounting portion or the main body for fitting and engaging in the engaging notched portion.

9. The connector device as set forth in claim 8 , wherein the engaging notched portion is formed on the outer circumference of the mounting portion and the engaging protruding portion is provided on the main body of the checker.

10. The connector device as set forth in claim 1 , wherein an anti-rotation mechanism is arranged between the mounting portion and the checker for retaining the checker anti-rotationally, the anti-rotation mechanism comprising a plurality of engaging notched portions formed in the outer circumference of the mounting portion in circumferentially spaced relation and an engaging protruding portion provided on the main body of the checker for fitting and engaging in one of the engaging notched portions, selectively.

11. A combination of a fluid line component and a connector, and a checker for verifying connection therebetween, comprising:

the fluid line component being formed with a connecting hole, and provided with an annular mounting portion raised outwardly on an opening portion of the connecting hole, the mounting portion including an outwardly directed engaging projection of annular shape,

the connector having a connecting portion to be inserted in the connecting hole for establishing connection to the fluid line component, the connecting portion being provided with at least a pair of stop arms at diametrically symmetrical positions thereof, each of the stop arms including an engaging pawl for snap-engaging with the outwardly directed engaging projection of the mounting portion in locking relation, each of the stop arms being provided with a protruding stop portion protruding outwardly,

the checker having a main body to be disposed on an outer circumference of the mounting portion from a lateral side thereof,

a pair of verifying portions provided on widthwise opposite ends of the main body so as to be located outside the stop arms, respectively, and

wherein each of the verifying portions is configured so as to locate an inner surface thereof inside an outer surface of the protruding stop portion, and the inner surface of the verifying portion being formed with a verifying recessed portion for accommodating the protruding stop portion when the engaging pawl correctly engages the outwardly directed engaging projection.