Patent ID: 8297955

Claim:
A roller pump that delivers a fluid contained in an elastic tube by pressingly closing the elastic tube using a roller of a roller rotating device positioned on a base, said roller pump comprising: a slide part that is movable in a direction toward the roller, and restricts an arrangement of the elastic tube; an operation part that operates said slide part to move backward to an opened state, where the elastic tube is installed in or removed from said roller pump, or forward to a closed state, where the elastic tube is held in said roller pump; and an inhibit part that inhibits said slide part from moving from the closed state to the opened state without the operation of said operation part, wherein said inhibit part includes a first link member and a second link member which are in contact with each other by respective curved contact surfaces, said first link member has a first end rotatably connected to said slide part and a second end arranged to rotate against a first end of said second link member, said first end of said second link member being rotatably coupled to said second end of said first link member through engagement between said respective curved contact surfaces such that said second end of said first link member and said first end of said second link member rotatably contact each other along said respective curved contact surfaces, and a second end of said second link member is rotatably coupled to a fixed part on the base, and wherein when said slide part is moved to the closed state, a contact point between said first link member and said second link member, along said respective curved contact surfaces, locks said first link member and said second link member, thereby inhibiting backward movement of said slide part.