Abstract: A writing instrument that includes a barrel, which includes a window in the side of the barrel, a movable writing tip, a moving member that is connected to the tip, and a side button designed to collaborate with the moving member. The moving member can be moved through the window between a first position, where the tip is retracted and the second position, where the tip is exposed.

Abstract: A writing instrument that includes a tubular body extending along a longitudinal axis between a rear end and a front end provided with an opening through which a writing tip is capable of protruding, a lateral button having at least one actuation face oriented radially outward and at least one first cam arranged inside the body, and a writing tip advancing mechanism that include a movable member movable in a longitudinal direction in the body. The movable member includes at least a first ramp inclined relative to the longitudinal axis, the lateral button is capable of remaining in a rest position in which the first cam is facing the first ramp, and the lateral button is capable of making a first tilting movement toward the inside of the body during which the first cam interacts with the first ramp and the movable member makes a first movement.

Abstract: The invention relates to a writing instrument, comprising a body (2), a lateral button (7) with a first cam (11) and a forwarding mechanism, having a movable member (20) with a first inclined plane (23). The lateral button (7) remains in a release position, in which the first cam faces the first inclined plane and can perform a first tilting movement, during which the first cam cooperates with the first inclined plane. Said button (7) comprises a second cam (12) which is longitudinally displaced from the first cam and the movable member has a bearing (25) which is adjacent to the second inclined plane (26). The second cam (12) is supported on the bearing during the first tilting movement and faces the second ramp at the end of said movement. The button can then perform a second tilting movement, during which the second cam cooperates with the second inclined plane.

Abstract: A writing instrument that includes a barrel, which includes a window in the side of the barrel, a movable writing tip, a moving member that is connected to the tip, and a side button designed to collaborate with the moving member. The moving member can be moved through the window between a first position, where the tip is retracted and the second position, where the tip is exposed.

Abstract: A mechanical pencil that includes a body extending between a rear end and a front end, and a lead-advancing mechanism that includes a movable member having a bearing surface; a chuck connected to the movable member; a clamping ring cooperating with the head of the chuck; and an elastic element having a rear end bearing against the bearing surface. The elastic element stresses the ring against the head when the advancing mechanism is in the rest position. A movable bush is arranged between the clamping ring and the front end of the elastic element. The chuck is movable with respect to the movable member over a defined stroke. The body has a stop to limit the forward displacement of the bush.