Connector cap waterproof structure

1. A connector cap for use in a portable electronic device comprising:

a base;

a connector-facing portion formed integrally with the base; and

a sealing member formed of an elastic material in a ring-like shape and joined to the base,

wherein the connector-facing portion includes a flexible member that has an elongated shape and is configured to extend away from the base and toward an inside of a casing of the portable device, wherein the flexible member is disposed from a position on the connector-facing portion that is within an inner area enclosed by the ring-like shape of the sealing member.

2. The connector cap according to claim 1 , wherein the connector-facing portion includes one or more rib members configured to cover a connector opening provided in the casing of the portable device and disposed from a position on the connector-facing portion that is within an inner area enclosed by the ring-like shape of the sealing member.

3. The connector cap according to claim 1 , wherein the connector-facing portion includes a plurality of claw portions configured to engage with a connector opening provided in the casing of the portable device and maintain a tight contact between the connector cap and the connector opening, and disposed from a position on the connector-facing portion that is within an inner area enclosed by the ring-like shape of the sealing member.

4. The connector cap according to claim 1 , wherein the sealing member is attached to the base by liquid silicone injection molding.

5. The connector cap according to claim 1 , wherein concave and convex portions are formed on a joint surface of the base with respect to the sealing member, and the sealing member includes concave and convex portions which complement the concave and convex portions formed on the joint surface of the base.

6. The connector cap according to claim 5 , wherein the joint surface of the base has been subjected to graining or blasting.

7. The connector cap according to claim 1 , wherein a continuous rib is formed on a joint surface of the base with respect to the sealing member, and the sealing member includes a continuous groove that is configured to wrap around the continuous rib.

8. The connector cap according to claim 1 , wherein T-shaped concave and convex portions are formed on a joint surface of the base with respect to the sealing member, and the sealing member includes T-shaped concave and convex portions which complement the concave and convex portions formed on the joint surface of the base.

9. The connector cap according to claim 1 , wherein a plurality of portions of the sealing member each wrap around and hold a respective portion of the base discontinuously over the circumference of the ring-like sealing member.

10. The connector cap according to claim 1 , wherein the base is formed of a thermoplastic resin, and the connector facing portion is formed of a thermoplastic elastic material.

11. A portable electronic device comprising:

a casing;

a connector disposed inside a connector opening provided in the casing; and

a connector cap that fits to the connector opening in a watertight manner,

the connector cap including:

a base,

a connector-facing portion formed integrally with the base, and

a sealing member formed of an elastic material in a ring-like shape and joined to the base, wherein the connector-facing portion includes a flexible member that has an elongated shape and is configured to extend away from the base and toward an inside of a casing of the portable device, wherein the flexible member is disposed from a position on the connector-facing portion that is within an inner area enclosed by the ring-like shape of the sealing member.