A retractable writing instrument includes a push member including a clip and a protruding and retracting mechanism that causes a pen point to protrude from and retract into a front end of the barrel at a frontward press on the push member, without the push member rotating with respect to the instrument. The protruding and retracting mechanism includes cam teeth and cam grooves formed in an inner face of the barrel, a rotary member including protuberances engageable alternately with the cam teeth or the cam grooves, a cam member connected to the push member and includes cam projections rotating the rotary member, and engagement projections engaged with the cam grooves in the inner face of the barrel so as to be movable in the longitudinal direction; and a resilient element that biases the writing element rearward. The push member and the cam member are in detent engagement with each other.

A writing instrument assembly has a writing instrument with a body and a working tip extended or extendable from the body. A holder has a landing spot for the writing instrument. The writing instrument is magnetically and detachably retained at the landing spot when attached to the holder. The working tip is sheathed or covered automatically when the writing instrument is attached to the holder and is unsheathed or uncovered when detached from the holder.

A writing instrument assembly has a writing instrument with a body and a working tip extended or extendable from the body. A holder has a landing spot for the writing instrument. The writing instrument is magnetically and detachably retained at the landing spot when attached to the holder. The working tip is sheathed or covered automatically when the writing instrument is attached to the holder and is unsheathed or uncovered when detached from the holder.

A writing implement according to an embodiment includes a position adjustment mechanism for adjusting a set position of a movable member that is capable of moving in an axial direction, wherein the position adjustment mechanism includes a pressing member that presses the movable member from a radial direction.

A cartridge is provided with a cartridge outer tube having a through hole and a support member that supports a cosmetic and that is received in the cartridge outer tube so as to be movable in the axial direction; the support member has a rod shaft portion that is linked to a tip end of a push rod at a base end thereof and a support tube that is provided on a tip end of the rod shaft portion and that supports the cosmetic; the through hole has a tip-end storing hole that stores the cosmetic and a base-end sliding hole that is provided so as to communicate with the tip-end storing hole, the base-end sliding hole being configured such that a linking portion formed of the tip end of the push rod and the base end of the support member slides therein in a linkage unreleasable state; and the linking portion is moved out from the base-end sliding hole by a feeding mechanism and is moved in a linkage releasable region in the tip-end storing hole.

A cartridge is provided with a cartridge outer tube having a through hole and a support member that supports a cosmetic and that is received in the cartridge outer tube so as to be movable in the axial direction; the support member has a rod shaft portion that is linked to a tip end of a push rod at a base end thereof and a support tube that is provided on a tip end of the rod shaft portion and that supports the cosmetic; the through hole has a tip-end storing hole that stores the cosmetic and a base-end sliding hole that is provided so as to communicate with the tip-end storing hole, the base-end sliding hole being configured such that a linking portion formed of the tip end of the push rod and the base end of the support member slides therein in a linkage unreleasable state; and the linking portion is moved out from the base-end sliding hole by a feeding mechanism and is moved in a linkage releasable region in the tip-end storing hole.

A knock type pen includes a body in which a lead and a spring which provides an elastic force to the lead are received, and a knock section which is coupled to a rear end of the body and includes a knock body and a rotary cam to push the lead out of a tip of the body or receive the lead inside, wherein the knock type pen includes a cutout groove which extends in one direction along an axial direction of the body, a slit hole which extends along a downward direction from an upper end of the cutout groove, an insert hole which is formed in a direction perpendicular to the slit hole from the upper end of the cutout groove, and a locking section which moves up and down along the slit hole.

A multi-purpose combination writing instrument is provided. The instrument can comprise a writing instrument holder, with 2 casing members connected together by a retractable unwinding tool. The retractable unwinding tool can be automatically retractable. One or more removable individual writing instruments can be reversibly attached to the writing instrument holder. An individual writing instrument is provided that comprises a male connector adapted to be mated to a corresponding female connector or that comprises an external screw thread. A casing member of a writing instrument holder is provided, comprising an automatic retracting mechanism stored in the casing member and adapted to be attached to a retractable unwinding tool and adapted to allow the retractable unwinding tool to automatically retract. Another multi-purpose combination writing instrument is provided, comprising a writing instrument holder that is fan-shaped (like a hand-held fan). Yet another multi-purpose combination writing instrument is provided, comprising a writing instrument holder comprising zero, one, or two casing members comprising a hinge assembly, which comprises a hinge.

A writing instrument has a nib that can retract automatically upon release of a grip on the writing instrument. The writing instrument has one or more leaves that can be flexed to push the cartridge towards the front end of the writing instrument to expose the nib. A spring applies a force on the cartridge to automatically retract the nib when a grip on the writing instrument is released.

A writing instrument extending between a first end and a second end, the writing instrument including a writing element, a first housing member extending between the first end and the second end and oriented about at least a portion of the writing element, and a second housing member extending between the first end and the second end and oriented about at least a portion of the first housing member, the second housing member being configured to move relative to the first housing member, between a first relative position and a second relative position, and at least a portion of the second housing member being configured to move radially with respect to the first housing member, wherein the relative movement of the second housing member automatically transitions the writing instrument from a writing state toward a non-writing state.