Provided are an oil-based ink composition for writing utensils, a writing utensil using the same, and an airbrush unit using the same. The oil-based ink composition for writing utensils has good writing properties on writing surfaces of various materials and improved scratch resistance to scratches repeated or to scratches with stronger force on a marking after writing. The subject oil-based ink composition for writing utensils contains at least an aluminum pigment, a colorant, a resin, an organic solvent, and a polydimethylsiloxane, the polydimethylsiloxane having polyether-modifying groups at both ends, and a total number of hydroxyl groups on the polyether-modifying groups being 3 or greater.

A writing instrument, comprising a tubular body having a longitudinal axis with a first and a second end, and with an opening arranged in the first end; a first building block having a body part with a substantially plane surface and one or more coupling knobs extending from the substantially plane surface, and where the first building block is fixed onto the outside of the tubular body so that the coupling knobs extend away from said longitudinal axis.

A telescoping writing implement that retracts the writing point when in the collapsed position. An external pen body is mechanically connected to a writing cartridge through at least one aperture in a guide tube. Movement of the external pen body downward draws the writing cartridge down inside the guide tube until the writing end of the writing cartridge is exposed and the connecting means such as a clip, screw or pin contacts the lower edge of the aperture. When the outer pen body is moved upward, it draws the writing cartridge with it inside the guide tube until the writing end is protected inside the guide tube. The limits of travel are governed by the dimensions of the aperture when the connecting means contacts the edge of the aperture. Additional elements may include an upper pen body with a pocket retainer clip and internal position detents.

A writing utensil puzzle kit for amusement and advertising purposes. The writing utensil puzzle kit includes a shaft, a writing member affixed to the shaft, a front housing piece securable to the writing member, a rear housing piece having a front end and rear end, wherein the rear end is securable to an end cap. A plurality of central housing pieces having a central channel that can receive the shaft, wherein each of the central housing pieces are securable to one another in a particular order via a threaded protrusion disposed on a front end thereof that can removably secure to a recessed channel disposed on a back end of an adjacent central housing piece. A gripping member is mountable to the housing piece. In an additional embodiment, the gripping member includes a plurality of interlocking gripping members with indicia thereon for indicating the particular order of connection thereof.

Angled pens are provided. A pen includes: a shank; an ink tube inside the shank; a first tip member connected to a distal end of the shank; a second tip member connected to a distal end of the first tip member; and a bent tubular member including a proximal end section, a middle section, and a distal end section. An axis of the middle section is arranged at a first angle relative to a central axis of the shank. The axis of the middle section is arranged at a second angle relative to an axis of the distal end section, the second angle being in a range of 45 to 90. The axis of the distal end section is arranged at a third angle relative to the central axis of the shank.

Angled pens are provided. A pen includes: a shank; an ink tube inside the shank; a first tip member connected to a distal end of the shank; a second tip member connected to a distal end of the first tip member; and a bent tubular member including a proximal end section, a middle section, and a distal end section. An axis of the middle section is arranged at a first angle relative to a central axis of the shank. The axis of the middle section is arranged at a second angle relative to an axis of the distal end section, the second angle being in a range of 45 to 90. The axis of the distal end section is arranged at a third angle relative to the central axis of the shank.

A writing instrument includes a first barrel and a second barrel that are able to rotate relative to each other about the axial direction, and presenting a first distal end and a second distal end, a writing tip being arranged at the first distal end while a pad for a capacitive screen is arranged at the second distal end, the writing tip and/or the pad for a capacitive screen being retractable by causing the first barrel to rotate relative to the second barrel, and where a barrel among the first barrel and the second barrel includes a tongue extending in the circumferential direction, the tongue being configured to establish electrical contact with the other barrel among the first barrel and the second barrel.

The use of an element for a writing, drawing, marking, and/or painting device, or cosmetic device, or input device for touch-sensitive surfaces, wherein the at least one element is a 3D-printed element. The at least one element has at least one main body and at least one structure. The at least one main body consists of a first material component. The at least one structure is provided as a visually detectable structure and/or at least one structure formed as a haptic zone. The at least one visually detectable structure and/or at least one structure formed as a haptic zone is a raised structure which projects from the surface, or the at least one visually detectable structure and/or at least one structure formed as a haptic zone is a decorated zone of the surface.

A compact ballpoint pen in which a bar of a push button is split into left and right bars and thus an ink cartridge can be inserted into a space between the split bars. Thus, the length of a ballpoint pen is reduced.

A pen system comprising a cover member joined to an adapter having an anterior end of an ink cartridge disposed therein is disclosed. A pen housing covers the ink cartridge and is sealed via a plug. In one embodiment, a slit divides a surface of the adapter to allow a collapse of the adapter, thus narrowing a height of the adapter, to allow insertion of the adapter into the cover member. A first and second annular groove are disposed at a center of the adapter, where each annular groove interfaces with a cover member annular ridge to define an open and closed position of the pen. In an alternate embodiment, an annular washer having an annular ridge is disposed in the cover member, in place of the cover member annular ridge, to interface with the first and second annular groove thus defining the open and closed positions of the pen.