#$%^&*AU2019222827A120200416.pdf#####RETAINING MECHANISM FOR TROCAR ASSEMBLY ABSTRACT An adapter assembly (100) for connecting a loading unit to a handle assembly (20), the adapter assembly (100) comprising: an outer sleeve (106)； a trocar assembly (120) releasably securable with the outer sleeve (106), the trocar assembly (120) including a trocar housing (122) defining first and second openings (123a, 123b)； and a retaining mechanism (130) configured to releasably secure the trocar assembly (120) within the outer sleeve (106), the retaining mechanism (130) including first and second button members (140, 142) configured for operable engagement by a user, the first and second button members (140, 142) are movable between a lock position with the first and second button members (140, 142) being flush with an outer surface of the outer sleeve (106), a release position in which the first and second buttons (140, 142) are recessed below the outer surface of the outer sleeve (106), and a cleanse position in which the first and second buttons (140, 142) extend beyond the outer surface of the outer sleeve (106), the trocar assembly (120) securely coupled within the outer sleeve (106) in the lock position.1/8 -CC
