Front cone of underwater motive device

Abstract

An underwater motive device includes a rear main housing including two side handle bars, a forward joining member having a decreased diameter, a shoulder between the forward joining member and a remaining portion of the rear main housing, a battery compartment defined in both the forward joining member and the remaining portion of the rear main housing wherein the forward joining member includes an annular front end, an annular front surface between the annular front end and the shoulder, two opposite first rails on a joining portion of the annular front end and the annular front surface, and a first space on the annular front surface and abutting each first rail; and a front cone including a rear opening, an internal, annular surface on a rear portion, and two opposite sets of a second rail and a second space.

What is claimed is: 
     
         1 . An underwater motive device, comprising:
 a rear main housing being substantially cylindrical and including two opposite handle bars on two sides respectively, a forward joining member being open and having a decreased diameter, a shoulder between the forward joining member and a remaining portion of the rear main housing, a battery compartment defined in both the forward joining member and the remaining portion of the rear main housing wherein the forward joining member includes an annular front end, an annular front surface between the annular front end and the shoulder, two opposite first rails on a joining portion of the annular front end and the annular front surface, and a first space on the annular front surface and abutting each of the first rails; and   a front cone including a rear opening, an internal, annular surface on a rear portion, and two opposite sets of a second rail and a second space disposed forwardly of the second rail;   wherein in an assembly the second rails contact the forward joining member by disposing on the annular front surface, and each of the second rails further moves to the first space which is rearward of each of the first rails so that the second rails are anchored by the first rails and a rear end of the front cone is releasably secured to the shoulder of the rear main housing.   
     
     
         2 . The underwater motive device as claimed in  claim 1 , further comprising a first limit member extending rearward out of an end of each of the first rails, and a second limit member extending forward out of an end of each of the second rails wherein a movement distance of the second rail is limited by the first limit member and a movement distance of the first rail is limited by the second limit member respectively. 
     
     
         3 . The underwater motive device as claimed in  claim 1 , wherein the front cone further comprises an aperture on the rear end, and wherein the rear main housing further comprises a detent on a front end of an outer surface, the detent including a trigger configured to either insert into the aperture to secure the front cone further and the rear main housing together or disengage from the aperture to separate the rear main housing from the front cone. 
     
     
         4 . The underwater motive device as claimed in  claim 3 , further comprising a seat on an inner surface of a front portion of the rear main housing, a limit hole adjacent to the seat, and two opposite tabs in the limit hole; wherein the detent further comprises two flexible latches extending from the trigger, a protrusion extending outward from each of the latches, and a hook at each of the latches and being configured to movably dispose in the limit hole to secure to the tab and further lock the detent; and wherein the trigger is configured to press to unlock the detent. 
     
     
         5 . The underwater motive device as claimed in  claim 1 , wherein in a locked position, the protrusions are disposed forwardly of the tabs; and wherein in an unlocked position, the protrusions are disposed rearward of the tabs.