To provide an improved housing unit having a knob and a housing for holding the knob, dispensing with a separate structure.
The underwater camera housing unit includes a shell having an exterior surface and an interior surface. The shell has a passage extending between the two surfaces and an outer sidewall surrounding the passage. A facing is united with the shell and has a bushing portion internal to and united with the outer sidewall. The bushing portion is resiliently compressible. The bushing portion and the outer sidewall together define a knob seat having an outer edge. The knob is disposed in the passage and has a seal portion and a handle exterior to the seal portion. The knob is movable inward relative to the shell from a normal pressure position, through a series of intermediate positions, to a maximum pressure position. The handle is spaced from the outer edge in the normal pressure position. The handle bears on the outer edge in the maximum pressure position. The seal portion bears on the bushing portion in all of the positions.
BAKER CRAIG A
STIEHLER WAYNE E
