Patent ID: 6967794

Claim:
A latch mechanism for producing a releasable connection of a housing portion ( 4 ) with a further housing portion ( 7 ), projections being provided on one of the housing portions, and for producing a releasable connection by means of a rotational motion of the housing portions relative to one another, the latch projections ( 25 ) latchingly engaging in associated latch recesses ( 58 ), wherein the latching mechanism ( 21 ) includes a rotatably mounted ring element ( 57 ) comprising the recesses ( 58 ) for receiving the projections ( 25 ), the latching mechanism being connectable by means of further latch recesses ( 51 ) and further latch projections ( 59 ) to the further housing portion ( 7 ) wherein at least one spring element ( 67 ) cooperates with the ring element ( 57 ), and upon production of the releasable connection with the housing portions ( 4 , 9 ), stress energy of the at least one spring element ( 67 ) is relieved, and the ring element ( 57 ) moves in an axial direction along an optical axis of the housing ( 20 ) when the spring element ( 67 ) is released.