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US 10,940,713 B2Granted
Thermochromic writing instrument having a separable eraser
AssigneeHeemangnote Co., Ltd.
InventorSeung Jae Lim
Life of this patent
Estimating the term…
Abstract
A thermochromic writing instrument capable of causing curiosity and interest of a user by configuring an eraser to be easily separated from the main body of the thermochromic writing instrument and to be shaped into various character dolls. A rotation member is inserted into a pen body and a hollow upper cover is detachably coupled to an outside of the upper portion of the pen body, a first eraser is connected to the rotation member by a connection member, a connection portion of an operation member is disposed in a groove formed at one side of the side wall of the pen body, the first body portion of the operation member is inserted into the pen body and a clip portion of the operation member is exposed to the outside of the pen body.
Claims9
A thermochromic writing instrument including:
- a hollow cylindrical pen body which has upper and lower openings;
- a pen shim which is inserted into the pen body and accommodates a thermochromic ink composition I therein;
- a spring which elastically supports the pen shim;
- and a lower cap which is fastened to a lower portion of the pen body in a threaded manner, characterized by comprising:
- an operation member which is inserted into the pen body so that a portion of the operation member is exposed to outside, the operation member including:
- a cylindrical first body portion, a connection portion extending from a side of the first body portion in a radial direction by a predetermined length perpendicular to the first body portion, and a clip portion integrally formed on a free end portion of the connection portion;
- a rotation member which is rotatably inserted into the pen body, the rotation member including:
- a cylindrical second body portion and an enlarged portion being enlarged outwardly from a lower portion of the second body portion in the radial direction so as to have an outer diameter larger than an outer diameter of the second body portion;
- a hollow upper cover which is detachably coupled to an upper outside of the pen body;
- a first eraser which rubs with the handwriting written by the thermochromic writing instrument and thermally discolors the handwriting using the rubbed heat generated at this time;
- and
- a connection member which connects the first eraser and the rotation member,
- wherein a groove is formed on a side of a side wall of the pen body, the first body portion is inserted into the pen body, the connection portion is disposed to pass through the groove, and the clip portion is exposed to an outside of the pen body, a first protrusion portion is formed on an upper portion of the pen body, a first latching jaw is formed on an outer surface of the first protrusion portion in the radial direction, a second latching jaw protrudes inward on the radially inner surface of the upper cover in the radial direction, and the upper cover is mounted on the first protrusion portion by the user of the thermochromic writing instrument pushing the upper cover downward so that the second latching jaw passes the first latching jaw downward.
10 more elements
A thermochromic writing instrument including:
- a hollow cylindrical pen body which has upper and lower openings;
- a pen shim which is inserted into the pen body and accommodates a thermochromic ink composition I therein;
- a spring which elastically supports the pen shim;
- and a lower cap which is fastened to a lower portion of the pen body in a threaded manner, characterized by comprising:
- an operation member which is inserted into the pen body so that a portion of the operation member is exposed to outside, the operation member including:
- a cylindrical first body portion, a connection portion extending from a side of the first body portion in a radial direction by a predetermined length perpendicular to the first body portion, and a clip portion integrally formed on a free end portion of the connection portion;
- a rotation member which is rotatably inserted into the pen body, the rotation member including:
- a cylindrical second body portion and an enlarged portion being enlarged outwardly from a lower portion of the second body portion in the radial direction so as to have an outer diameter larger than an outer diameter of the second body portion;
- a hollow upper cover which is detachably coupled to an upper outside of the pen body;
- a first eraser which rubs with the handwriting written by the thermochromic writing instrument and thermally discolors the handwriting using the rubbed heat generated at this time;
- and
- a connection member which connects the first eraser and the rotation member,
- wherein a first contact portion having a saw-tooth shape is formed on a lower-end portion of the first body portion, a plurality of second protrusion portions are formed on an outer peripheral surface of the enlarged portion in the radial direction with a predetermined gap therebetween, upper-end portions of the second protrusion portions extend to a side of the second body portion in a state of passing through a boundary between the second body portion and the enlarged portion, a second contact portion is formed on the upper-end portions of the second protrusion portions, the second contact portion is formed to be inclined at an acute angle corresponding to the shape of the first contact portion, and the second body portion except for the enlarged portion in the rotation member is inserted into the first body portion.
10 more elements
A thermochromic writing instrument including:
- a hollow cylindrical pen body which has upper and lower openings;
- a pen shim which is inserted into the pen body and accommodates a thermochromic ink composition I therein;
- a spring which elastically supports the pen shim;
- and a lower cap which is fastened to a lower portion of the pen body in a threaded manner, characterized by comprising:
- an operation member which is inserted into the pen body so that a portion of the operation member is exposed to outside, the operation member including:
- a cylindrical first body portion, a connection portion extending from a side of the first body portion by a predetermined length perpendicular to the first body portion in a radial direction, and a clip portion integrally formed on a free end portion of the connection portion;
- a rotation member which is rotatably inserted into the pen body, the rotation member including:
- a cylindrical second body portion and an enlarged portion being enlarged outwardly from a lower portion of the second body portion in the radial direction so as to have an outer diameter larger than an outer diameter of the second body portion;
- a hollow upper cover which is coupled to an upper outside of the pen body;
- an eraser means for rubbing the handwriting written by the thermochromic writing instrument and thermally discolors the handwriting using the rubbed heat occurring at this time;
- and
- a pressing portion which exposes the pen shim to a lower portion of the pen body and at the same time is capable of performing pressing and rotating operations;
- and
- a connection member which connects the pressing portion and the rotation member to each other.
11 more elements
Dependencies are inferred from the claim text.