A housing element for a writing instrument includes a hollow, sleeve-shaped, elongated base body having an opening for receiving the writing instrument or a pencil lead of the writing instrument at a first longitudinal end. The base body has a second longitudinal end, which is opposite the first longitudinal end, and has a retaining recess that is formed with a polygonal cross section for directly or indirectly retaining a bit in a rotationally fixed manner. A writing instrument including the housing element is also provided.

Manual device (200), comprising a casing (212) having a first distal end (12-1) and a second distal end (12-2), a first head (16A) and a second head (16B) that are movable axially between a use position and a retracted position, and a single mechanism (214) that is configured to bring the first head (16A) and the second head (16B) from the retracted position to the use position and vice versa, the mechanism (214) comprising at least one carriage (214A1, 214A2) having at least one head selected from the first head and the second head (16A, 16B) and a single spring (214B).

A writing instrument comprising a housing extending in a longitudinal direction and having a radial direction, and first and second concentric writing tips, the second writing tip arranged around the first writing tip, each writing tip received in the housing and able to assume an operating configuration, the housing comprising, at a longitudinal end, a deformable nose at least in the radial direction, the deformable nose comprising at least one slit extending in the longitudinal direction, the deformable nose not being deformed when only the first writing tip is in an operating configuration and the deformable nose being deformed when the second writing tip is in an operating configuration, the deformable nose comprising an exit opening of the first and second writing tips, the diameter of the exit opening being greater than the diameter of the first writing tip and less than that of the second writing tip.

A multifunctional writing instrument comprising a body housing at least two writing elements, each writing element comprising a writing tip, a selection device configured to select one writing element from the at least two writing elements and a retraction device configured to move a selected writing element between a writing position in which the writing tip of the selected writing element protrudes from the body and a retracted position in which the writing tip of the selected writing element is retracted.

A composite writing implement according to an embodiment includes a barrel, writing shafts housed in the barrel, a cam main body including a cam projection, an end surface extending along the cam projection, and a latch recess provided in the cam projection, and sliders configured to be connected to respective rear ends of the writing shafts, and include a cam configured to be latchable to the latch recess, and have a sliding contact surface to be pressed against the end surface, wherein the end surface includes a first inclined portion that is positioned on the front end side of the cam projection and is inclined by a first incline angle, and a second inclined portion that is positioned further toward the rear end side of the cam projection than the first inclined portion, and is inclined by a second incline angle that is larger than the first incline angle.

A writing instrument extending along an axis and comprising a writing tip and an eraser, a first helical cam propelling mechanism configured to move the writing tip along the axis between a retracted position and a protruded position and a second helical cam propelling mechanism configured to move the eraser along the axis between a retracted position and a protruded position, the first helical cam propelling mechanism comprising a first cam follower and a first helical cam, the second helical cam propelling mechanism comprising a second cam follower and a second helical cam, each of the first cam follower, the first helical cam, the second cam follower and the second helical cam being provided on distinct elements.

A multifunction writing instrument comprising a body extending along an axis and receiving at least two writing elements, each writing element comprising a writing tip and being movable between a protruded position in which the writing tip extends out of the body and a retracted position in which the writing tip is retracted within the body, and an actuating mechanism comprising a spinner configured to move one of the writing elements at a time, one after the other, from the retracted position to the protruded position, a ratchet receiving the spinner, and a single button configured to actuate the actuating mechanism.

Multifunction writing instrument comprising a body extending in an axial direction and housing at least two retractable writing elements and a ring portion movable in rotation. The ring portion having at least as many pairs of guide surfaces as retractable writing elements. The writing elements include buttons. Each button is configured to cooperate with a respective one of the pair of guide surfaces of the ring portion. Actuation of the button of a writing element facilitates movement of the writing element from the retracted position to the writing position and returns any of the other writing elements in the writing position to the retracted position, whereby at most, one writing element is in the writing position.

A barrel assembly according to an embodiment includes one barrel having an annular engaging projection; and another barrel having an engaging projection that protrudes toward the annular engaging projection of the one barrel, wherein the engaging projection of the other barrel has an engaging edge that protrudes in a direction of engagement, the engaging edge further has a protruding molded part that further protrudes from the engaging edge in the direction of engagement, and the protruding molded part of the engaging edge of the other barrel engages with the annular engaging projection of the one barrel.

A manual device extends in an axial direction and includes a housing having a first housing portion and a second housing portion. First and second heads are each axially movable between a use position and a stowed position. The first head is in the stowed position when the second head is in the use position, whereas the second head is in the stowed position when the first head is in the use position. The first head and the second head both are carried by a single carriage movable in the axial direction and arranged inside a barrel. A groove forming a cam track is formed by a first shoulder of the first housing portion and by a second shoulder of the barrel. A lug of the carriage cooperates with the groove.