A clip body includes one upper wall extending in a longitudinal direction of a barrel and a pair of side walls formed at least on a front side of the upper wall, projecting from both side portions of the upper wall in a direction of a surface of the barrel, and having inner surfaces facing each other, a holding portion is provided on a back side of the clip body and between the pair of side walls, has a shape capable of producing an elastic force by deformation, and projects more in the direction of the surface of the barrel than the pair of side walls, the surface of the barrel includes a guide groove extending in the longitudinal direction of the barrel and provided with a bottom surface contacting the holding portion and a pair of side surfaces to restrict lateral movement of the holding portion, and a clip base is connected to a rear side of the clip body and supports the clip body at a height not to cause the pair of side walls to contact the surface of the barrel and the holding portion to contact the bottom surface of the guide groove.

A clip body includes one upper wall extending in a longitudinal direction of a barrel and a pair of side walls formed at least on a front side of the upper wall, projecting from both side portions of the upper wall in a direction of a surface of the barrel, and having inner surfaces facing each other, a holding portion is provided on a back side of the clip body and between the pair of side walls, has a shape capable of producing an elastic force by deformation, and projects more in the direction of the surface of the barrel than the pair of side walls, the surface of the barrel includes a guide groove extending in the longitudinal direction of the barrel and provided with a bottom surface contacting the holding portion and a pair of side surfaces to restrict lateral movement of the holding portion, and a clip base is connected to a rear side of the clip body and supports the clip body at a height not to cause the pair of side walls to contact the surface of the barrel and the holding portion to contact the bottom surface of the guide groove.

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 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 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 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.

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.

A stylus suitable for an electronic device is provided. The stylus comprises a pen barrel and a core. The pen barrel has a sidewall and at least one first protrusion, and the first protrusion is located at an inner side of the sidewall. The core movably passes through the pen barrel. The core has a pen tip and at least one second protrusion. Under a first status, the first protrusion and the second protrusion are dislocated from each other. Under a second status, the first protrusion and the second protrusion are aligned with each other to make a part of pen barrel expand and deform.

A stylus suitable for an electronic device is provided. The stylus comprises a pen barrel and a core. The pen barrel has a sidewall and at least one first protrusion, and the first protrusion is located at an inner side of the sidewall. The core movably passes through the pen barrel. The core has a pen tip and at least one second protrusion. Under a first status, the first protrusion and the second protrusion are dislocated from each other. Under a second status, the first protrusion and the second protrusion are aligned with each other to make a part of pen barrel expand and deform.