A writing instrument compressing device includes a base having an underside mounted to multiple raiser pieces to have the base separate from a carrying surface by a distance in a vertical direction. The base includes an elongate hole that is delimited by two opposite sidewalls each including tooth ridges and the tooth troughs alternately arranged. A handle rod is pivoted to an end of the base to drive reciprocal movement of a pusher. A retainer is reciprocally movable along the elongate hole of the base and functions to clamp and fix a writing instrument body or a tool. The retainer is provided, on a bottom thereof, with a screw rod extending through the elongate hole of the base. A tightening assembly includes a nut and a rotation bar horizontally penetrating through the nut and having two ends selectively moved close to the nut.

A pen includes a pen tube, a connection structure, a cap and an elastic unit. The pen tube includes a pen tube case and a thread portion provided at the pen tube case. The connection structure includes a main body, a corresponding thread portion and an elastic unit fastener. The corresponding thread fastener is located at the main body and is for joining with the thread portion. The elastic unit fastener is provided at the main body. The cap includes a cap case and an elastic unit corresponding fastener provided at the cap case. The two ends of the elastic unit are respectively fastened to the elastic unit fastener and the elastic unit corresponding fastener.

A pen includes a pen tube, a connection structure, a cap and an elastic unit. The pen tube includes a pen tube case and a thread portion provided at the pen tube case. The connection structure includes a main body, a corresponding thread portion and an elastic unit fastener. The corresponding thread fastener is located at the main body and is for joining with the thread portion. The elastic unit fastener is provided at the main body. The cap includes a cap case and an elastic unit corresponding fastener provided at the cap case. The two ends of the elastic unit are respectively fastened to the elastic unit fastener and the elastic unit corresponding fastener.

A pen assembling press includes a base, a press unit, a carriage, and a positioning arrangement. Actuation of a lever moves an engagement head relative to the base along an actuation axis. A second engagement head is coaxial with the first engagement head. The carriage is movably mounted to the base. The positioning arrangement includes a slot, a plurality of recesses and a pin. The slot extends through the first leg in a direction perpendicular to the actuation axis. The slot has a constant height section having a height. The pin has a shaft and a head. The head is receivable in the recesses. The shaft has a thickness being substantially equal to the height of the constant height section of the slot. The pin is movable relative to the carriage along a pin axis that is perpendicular to the actuation axis to selectively engage and disengage the recesses.

A pen assembling press includes a base, a press unit, a carriage, and a positioning arrangement. Actuation of a lever moves an engagement head relative to the base along an actuation axis. A second engagement head is coaxial with the first engagement head. The carriage is movably mounted to the base. The positioning arrangement includes a slot, a plurality of recesses and a pin. The slot extends through the first leg in a direction perpendicular to the actuation axis. The slot has a constant height section having a height. The pin has a shaft and a head. The head is receivable in the recesses. The shaft has a thickness being substantially equal to the height of the constant height section of the slot. The pin is movable relative to the carriage along a pin axis that is perpendicular to the actuation axis to selectively engage and disengage the recesses.

A writing instrument compressing device includes a base having an underside mounted to multiple raiser pieces to have the base separate from a carrying surface by a distance in a vertical direction. The base includes an elongate hole that is delimited by two opposite sidewalls each including tooth ridges and the tooth troughs alternately arranged. A handle rod is pivoted to an end of the base to drive reciprocal movement of a pusher. A retainer is reciprocally movable along the elongate hole of the base and functions to clamp and fix a writing instrument body or a tool. The retainer is provided, on a bottom thereof, with a screw rod extending through the elongate hole of the base. A tightening assembly includes a nut and a rotation bar horizontally penetrating through the nut and having two ends selectively moved close to the nut.

A writing instrument compressing device includes a base having an underside mounted to multiple raiser pieces to have the base separate from a carrying surface by a distance in a vertical direction. The base includes an elongate hole that is delimited by two opposite sidewalls each including tooth ridges and the tooth troughs alternately arranged. A handle rod is pivoted to an end of the base to drive reciprocal movement of a pusher. A retainer is reciprocally movable along the elongate hole of the base and functions to clamp and fix a writing instrument body or a tool. The retainer is provided, on a bottom thereof, with a screw rod extending through the elongate hole of the base. A tightening assembly includes a nut and a rotation bar horizontally penetrating through the nut and having two ends selectively moved close to the nut.

A thermochromic writing instrument including a writing body, storing a thermochromic ink therein, stored in a barrel; an operation body provided in the barrel to be operated to longitudinally move the writing body; a nib of the writing body configured to be capable of appearing from a front end of the writing instrument, wherein the writing instrument 1 further includes a friction unit, for rubbing handwriting in the thermochromic ink and capable of thermally changing the color of the handwriting by frictional heat generated at that time, and at least one clip body as the operation body, the friction unit 10 is provided at a rear end of the barrel, and the clip body is provided in an area other than the rear end of the barrel.

A thermochromic writing instrument including a writing body, storing a thermochromic ink therein, stored in a barrel; an operation body provided in the barrel to be operated to longitudinally move the writing body; a nib of the writing body configured to be capable of appearing from a front end of the writing instrument, wherein the writing instrument 1 further includes a friction unit, for rubbing handwriting in the thermochromic ink and capable of thermally changing the color of the handwriting by frictional heat generated at that time, and at least one clip body as the operation body, the friction unit 10 is provided at a rear end of the barrel, and the clip body is provided in an area other than the rear end of the barrel.

A thermochromic writing instrument including a writing body, storing a thermochromic ink therein, stored in a barrel; an operation body provided in the barrel to be operated to longitudinally move the writing body; a nib of the writing body configured to be capable of appearing from a front end of the writing instrument, wherein the writing instrument 1 further includes a friction unit, for rubbing handwriting in the thermochromic ink and capable of thermally changing the color of the handwriting by frictional heat generated at that time, and at least one clip body as the operation body, the friction unit 10 is provided at a rear end of the barrel, and the clip body is provided in an area other than the rear end of the barrel.