Abstract: A manual device including a first portion and a second portion. The second portion being at least partially fitted into the first portion and being moveable in translation relative to the first portion. The first portion having a first distal end while the second portion has a second distal end opposite the first distal end. The second portion also includes a locking device designed to prevent the first portion from moving in translation relative to the second portion only when, considered in the direction of gravity. The first distal end is arranged above the second distal end, and the locking device includes a chamber and a ball or equivalent accommodated in the chamber. The chamber is provided only in the second portion.

Abstract: An erasable ink writing instrument comprising a body extending along an axis, the body having a first end and a second end opposed to the first end along the axis, the first end being provided with a writing tip and with an eraser, wherein the writing tip is fed with erasable ink, wherein the writing tip is fixed with regard to the body and the eraser is movable along the axis with regard to the body, and the erasable ink writing instrument further comprising a helical-cam propelling mechanism configured to move the eraser along the axis between a retracted position and a protruding position. The erasable ink is a peelable ink and the eraser is a friction body.

Abstract: A thermochromic ink writing instrument comprising a body extending along an axis, the body having a first end and a second end opposed to the first end along the axis, the first end being provided with a writing tip and with an eraser, wherein the writing tip is fed with thermochromic ink, wherein the writing tip is fixed with regard to the body and the eraser is movable along the axis with regard to the body, and the thermochromic ink writing instrument further comprising a helical-cam propelling mechanism configured to move the eraser along the axis between a retracted position and a protruding position.

Abstract: An erasable ink writing instrument comprising a body extending along an axis, the body having a first end and a second end opposed to the first end along the axis, the first end being provided with a writing tip and with an eraser, wherein the writing tip is fed with erasable ink, wherein the writing tip is fixed with regard to the body and the eraser is movable along the axis with regard to the body, and the erasable ink writing instrument further comprising a helical-cam propelling mechanism configured to move the eraser along the axis between a retracted position and a protruding position. The erasable ink is a peelable ink and the eraser is a friction body.

Abstract: A thermochromic ink writing instrument comprising a body extending along an axis, the body having a first end and a second end opposed to the first end along the axis, the first end being provided with a writing tip and with an eraser, wherein the writing tip is fed with thermochromic ink, wherein the writing tip is fixed with regard to the body and the eraser is movable along the axis with regard to the body, and the thermochromic ink writing instrument further comprising a helical-cam propelling mechanism configured to move the eraser along the axis between a retracted position and a protruding position.

Abstract: A writing instrument comprising a body extending along an axial direction and an erasing device comprising an eraser, the erasing device being disposed at an axial end of the body of the writing instrument, the eraser being able to assume a use position and a protection position, the eraser being configured to switch from the use position to the protection position by a displacement of the eraser by means of an actuation device of the erasing device, the actuation device being configured to be actuated along a axis perpendicular to the axial direction.

Abstract: A manual device including a first portion and a second portion. The second portion being at least partially fitted into the first portion and being moveable in translation relative to the first portion. The first portion having a first distal end while the second portion has a second distal end opposite the first distal end. The second portion also includes a locking device designed to prevent the first portion from moving in translation relative to the second portion only when, considered in the direction of gravity. The first distal end is arranged above the second distal end, and the locking device includes a chamber and a ball or equivalent accommodated in the chamber. The chamber is provided only in the second portion.

Abstract: A manual device including a first portion and a second portion. The second portion being at least partially fitted into the first portion and being moveable in translation relative to the first portion. The first portion having a first distal end while the second portion has a second distal end opposite the first distal end. The second portion also includes a locking device designed to prevent the first portion from moving in translation relative to the second portion only when, considered in the direction of gravity. The first distal end is arranged above the second distal end, and the locking device includes a chamber and a ball or equivalent accommodated in the chamber. The chamber is provided only in the second portion.

Abstract: A manual device including a first portion and a second portion. The second portion being at least partially fitted into the first portion and being moveable in translation relative to the first portion. The first portion having a first distal end while the second portion has a second distal end opposite the first distal end. The second portion also includes a locking device designed to prevent the first portion from moving in translation relative to the second portion only when, considered in the direction of gravity. The first distal end is arranged above the second distal end, and the locking device includes a chamber and a ball or equivalent accommodated in the chamber. The chamber is provided only in the second portion.

Abstract: A writing instrument comprising a body extending along an axial direction and an erasing device comprising an eraser, the erasing device being disposed at an axial end of the body of the writing instrument, the eraser being able to assume a use position and a protection position, the eraser being configured to switch from the use position to the protection position by a displacement of the eraser by means of an actuation device of the erasing device, the actuation device being configured to be actuated along a axis perpendicular to the axial direction.

Abstract: A structure for mounting a clip for a writing implement which has a barrel extending along a longitudinal axis. The structure includes a fastening member made of plastic material integral with the barrel and having a proximal wall and a distal wall with respect to the barrel, the proximal and distal walls being arranged opposite each other and overall extending in substantially parallel respective planes in order to form between them a recess having an open insertion end. The clip includes a fastening portion having a substantially uniform thickness and is suitable for mounting in the recess by the open insertion end.

Abstract: A writing implement that includes a writing body extending from an end; a writing tip integral with the writing body, and a removable cap that covers the writing tip in a coupled position of the cap with the writing body, the cap having a bottom, a tubular wall that extends along a central axis between a first end that joins with the bottom and a second end that defines an axial opening, the tubular wall has an inner surface on which protrusions are capable of holding the cap by engagement with the writing body in the coupled position, where the inner surface of the cap has at least one groove arranged between two of the protrusions and extends to the second end of the tubular wall.

Abstract: A writing implement that includes a writing body extending from an end; a writing tip integral with the writing body, and a removable cap that covers the writing tip in a coupled position of the cap with the writing body, the cap having a bottom, a tubular wall that extends along a central axis between a first end that joins with the bottom and a second end that defines an axial opening, the tubular wall has an inner surface on which protrusions are capable of holding the cap by engagement with the writing body in the coupled position, where the inner surface of the cap has at least one groove arranged between two of the protrusions and extends to the second end of the tubular wall.

Abstract: A structure for mounting a clip for a writing implement which has a barrel extending along a longitudinal axis. The structure includes a fastening member made of plastic material integral with the barrel and having a proximal wall and a distal wall with respect to the barrel, the proximal and distal walls being arranged opposite each other and overall extending in substantially parallel respective planes in order to form between them a recess having an open insertion end. The clip includes a fastening portion having a substantially uniform thickness and is suitable for mounting in the recess by the open insertion end.