Waterproof device

Abstract

A waterproof device includes a first housing member for covering a front portion of a connector from which a cable extends rearwardly; an elastic member for covering at least a portion of the cable; a cylindrical second housing member attached to the first housing member such that it covers and presses the elastic member against the cable; and a third housing member detachably attached to the first housing member so as to press the second housing member against the first housing member such that the second housing member covers a rear portion of the connector.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1( a) is an exploded side view of a waterproof device according to an embodiment of the invention;

FIG. 1( b) is a front view of a housing for the waterproof device;

FIG. 2 is a side view of the waterproof device attached to an optical connector;

FIG. 3 is a side view of a waterproof device according to a second embodiment of the invention;

FIG. 4 is a side view of a waterproof device according to a third embodiment of the invention; and

FIG. 5 is an exploded perspective view of a conventional waterproof device

Claims

1. A waterproof device comprising: a first housing member for covering a front portion of a connector from which a cable extends rearwardly;an elastic member for covering at least a portion of said cable;a cylindrical second housing member attached to said first housing member such that it covers and presses said elastic member against said cable; anda third housing member detachably attached to said first housing member so as to press said second housing member against said first housing member such that said second housing member covers a rear portion of said connector.

2. The waterproof device according to claim 1, wherein said second housing member is movable toward said first housing member along said cable; said third housing member is movable toward said first housing member along said cable together with said second housing member and fixed to said first housing member against an elastic force of said elastic member.

3. The waterproof device according to claim 2, wherein said cylindrical second housing member has a tailing section having gradually reduced diameter so that when said second housing member is moved toward said first housing member, said tailing section contracts a rear portion of said elastic member, thus pressing said rear portion against said cable.

4. The waterproof device according to claim 1, wherein said elastic member has a substantially constant diameter cylindrical form that has a slit along its longitudinal direction and a central bore shaped correspondingly to the cable.

5. The waterproof device according to claim 1, wherein said second housing member is provided with waterproof means for closing a gap between said first and second housing member.

6. The waterproof device according to claim 5, wherein said waterproof means is a ring shaped member fitted in a groove provided in a front portion of said second housing member.

7. The waterproof device according to claim 2, wherein said second housing member is provided with a rearwardly facing step and said third housing member is provided with a forwardly facing step such that said rearwardly facing step abuts against said forwardly facing step to engage said second and third housing members.

8. The waterproof device according to claim 2, wherein said second housing member is provided with a rearwardly facing section and said third housing member is provided with an abutment face extending toward a center such that said rearwardly facing section abuts against said abutment face to engage said second and third housing members.

9. The waterproof device according to claim 1, wherein said third housing member is bayonet-connected to said first housing member.

10. The waterproof device according to claim 1, wherein said connector consists of a first connector component to which said cable is connected and a second connector component detachably fitted into said first connector component; said elastic member attached to said first connector component; said first housing member attached to said second connector component; and said first connector component fitted into said second connector component before said second and third housing members are detachably attached to said first housing member.