A soft-member attachment structure includes an attachment hole provided through a rear end portion of a barrel. The barrel configures a thermochromic writing instrument, along a longitudinal central axis and having an inner circumferential surface between two openings located at an upper end and a lower end; an attachment portion located under a large diameter portion of a soft member used for a thermochromic change and having a diameter being smaller than a diameter of the large diameter portion and allowing insertion into the attachment hole; a straight internal hole provided along a longitudinal central axis of the soft member and opening at least at a lower end of the soft member; and a rod-like inner core having an outer diameter allowing insertion into the internal hole, a length to be placed within the internal hole, and an outer circumferential surface contacting an inner circumferential surface of the internal hole. The attachment portion is inserted into the attachment hole and the inner core is inserted into the internal hole to attach the soft member to the attachment hole.

A soft-member attachment structure includes an attachment hole provided through a rear end portion of a barrel. The barrel configures a thermochromic writing instrument, along a longitudinal central axis and having an inner circumferential surface between two openings located at an upper end and a lower end; an attachment portion located under a large diameter portion of a soft member used for a thermochromic change and having a diameter being smaller than a diameter of the large diameter portion and allowing insertion into the attachment hole; a straight internal hole provided along a longitudinal central axis of the soft member and opening at least at a lower end of the soft member; and a rod-like inner core having an outer diameter allowing insertion into the internal hole, a length to be placed within the internal hole, and an outer circumferential surface contacting an inner circumferential surface of the internal hole. The attachment portion is inserted into the attachment hole and the inner core is inserted into the internal hole to attach the soft member to the attachment hole.

A new design for a marker holder and eraser has a front side and a back side, the back side having a recess. The front side has two openings for retaining markers. A metal plate and a magnet holder are disposed within the recess and an erasing material covers the recess. Projections extend from the magnet holder into openings on the front side to engage markers disposed in the openings, thereby holding the markers at any angle.

A new design for a marker holder and eraser has a front side and a back side, the back side having a recess. The front side has two openings for retaining markers. A metal plate and a magnet holder are disposed within the recess and an erasing material covers the recess. Projections extend from the magnet holder into openings on the front side to engage markers disposed in the openings, thereby holding the markers at any angle.

A multi-function pen includes a cap; a metal body connected with the cap, where a first accommodating cavity is formed between the metal body and the cap, an outer wall of the metal body is provided with a gap for opening a bottle cap, and the gap is disposed below the first accommodating cavity; a light emitting structure accommodated in the first accommodating cavity; a nib in threaded connection with the metal body, where a second accommodating cavity is formed between the nib and the metal body; and a refill accommodated in the second accommodating cavity. The multi-function pen can meet the basic working demands of electricians and woodworkers, and is small, light, convenient to be put in pockets of operators and practical.

A multi-function pen includes a cap; a metal body connected with the cap, where a first accommodating cavity is formed between the metal body and the cap, an outer wall of the metal body is provided with a gap for opening a bottle cap, and the gap is disposed below the first accommodating cavity; a light emitting structure accommodated in the first accommodating cavity; a nib in threaded connection with the metal body, where a second accommodating cavity is formed between the nib and the metal body; and a refill accommodated in the second accommodating cavity. The multi-function pen can meet the basic working demands of electricians and woodworkers, and is small, light, convenient to be put in pockets of operators and practical.

Writing instrument having a body, a clip, and a retractable eraser device movable between a first position and a second position, the clip forming a housing that is designed to receive all or part of a gripping portion of the eraser device in the first position.

Writing instrument having a body, a clip, and a retractable eraser device movable between a first position and a second position, the clip forming a housing that is designed to receive all or part of a gripping portion of the eraser device in the first position.

Convertible writing instrument assemblies are provided, including an outer barrel having a tapered nosecone with an aperture for a writing instrument tip and a grip portion, and an aperture for receiving an eraser or a push button therethrough, wherein the writing instrument assembly provides selective access to a volume defined by the outer barrel, and wherein the outer barrel and the volume are collectively configured to operably and interchangeably receive a mechanical pencil insert having the eraser and a retractable pen insert having the push button. Mechanical pencils and pens utilizing the convertible writing instrument assemblies are also provided, along with kits for providing such mechanical pencils and pens.

Convertible writing instrument assemblies are provided, including an outer barrel having a tapered nosecone with an aperture for a writing instrument tip and a grip portion, and an aperture for receiving an eraser or a push button therethrough, wherein the writing instrument assembly provides selective access to a volume defined by the outer barrel, and wherein the outer barrel and the volume are collectively configured to operably and interchangeably receive a mechanical pencil insert having the eraser and a retractable pen insert having the push button. Mechanical pencils and pens utilizing the convertible writing instrument assemblies are also provided, along with kits for providing such mechanical pencils and pens.