Abstract: A capacitive electronic pen includes a housing, a core body, and a peripheral electrode. In the capacitive electronic pen, the core body includes an electrode core formed of a conductor having a spherical section and a shaft center section. The spherical section of the electrode core is not surrounded by the peripheral electrode and is disposed on a tip (distal) end of the capacitive electronic pen protruding from one opening in the axial direction of the housing. The shaft center section of the electrode core has multiple portions that vary in thickness (a cross-section size) including a thin portion, which coupled with the spherical section, and a thick portion. When the core body is fitted to the core body holder, at least a portion of the shaft center section of the electrode core is thinner than the diameter of the spherical section of the electrode core.

Abstract: In a case in which an electronic pen main unit made into a cartridge is held movably in a casing, electrical connections between the electronic pen main unit and electronic circuit components of the casing are reliably established. The electronic pen main unit is fitted to a fitting part disposed in a casing of an electronic pen in which the pen tip side is made to be an opening and is housed in a state of being movable in a hollow part of the casing by a movement mechanism that moves the fitting part in the axial center direction of the casing.

Abstract: A cartridge-type electronic pen main body includes a conductive center electrode and a peripheral electrode disposed around the center electrode. The peripheral electrode includes a tapered part on a pen tip side and a cylindrical shaped part on an opposite side along an axial direction. When the cartridge-type electronic pen main body is in use, one end of the center electrode forming a pen tip is projected to the outside from an opening of a cylindrical housing of an electronic pen, and a portion of the tapered part of the peripheral electrode is also projected to the outside such that both the one end of the center electrode and the portion of the tapered part of the peripheral electrode are projected beyond a distal end of the cylindrical housing to capacitively couple with a sensor surface while the cylindrical shaped part of the peripheral electrode remains within the cylindrical housing.

Abstract: Provided is an electronic pen including an electronic pen main part including a first sealing member that covers circumference of a tip side of the electronic pen main part and a second sealing member disposed along an outer edge of the electronic pen main part at a position separate from a tip toward a rear end side of the electronic pen main part, and an inside body that is tubular and has an inner wall surface with which the first sealing member and the second sealing member come into contact through insertion of the tip side of the electronic pen main part into the inside body.

Abstract: A highly reliable waterproof electronic pen includes a board holder in a board housing including a recessed portion having an opening over a lower surface of the recessed portion. A circuit board is housed in the recessed portion of the board housing. Circuit components easily affected by heat are installed on a first surface of the circuit board, and circuit components not easily affected by heat are installed on a second surface of the circuit board. A thermosetting resin formed over the second surface of the circuit board when the circuit board is housed in the recessed portion seals the opening over the lower surface of the recessed portion of the board housing.

Abstract: An electronic pen includes a circuit board disposed such that an axial direction of a casing is aligned with a longitudinal direction of the circuit board, an electronic circuit on the circuit board, and a battery having a columnar shape disposed on a side of the circuit board opposite to a pen tip side of the circuit board inside a hollow portion of the casing such that positive and negative electrode conductors protruding from an end surface of the battery extend toward the circuit board. The battery is disposed such that a separation space is formed between the end surface and an end portion of the circuit board and such that tip portions of the positive and negative electrode conductors are in contact with the circuit board. The circuit board and the tip portions of the positive and negative electrode conductors are electrically connected to each other by soldered portions.

Abstract: A pressure detection element of a capacitive system includes a dielectric having two opposing surfaces including a first surface and a second surface, a conductor layer provided on the first surface of the dielectric, a conductive elastic member provided on the second surface of the dielectric, a spacer that positions the conductive elastic member at a predetermined distance from the second surface of the dielectric, and a pressing member configured to push the conductive elastic member toward the dielectric. An end surface of the pressing member that presses the conductive elastic member has a predetermined curvature, with an apex at a center of the end surface. A protrusion is provided at the apex at the center of the end surface of the pressing member.

Abstract: An electronic pent includes a case, a core body, and a signal generation circuit. The core body is attached inside the case such that a front end portion in an axial direction protrudes from an opening portion of the case. The signal generation circuit generates a signal to be transmitted from the core body. The core body includes a core rod and a protection member that covers a pen tip portion and an axis portion of the core rod. The core body is provided with a middle portion with a dielectric constant different from a dielectric constant of the protection member, the middle portion being provided around a side surface of the axis portion of the core rod such that the core rod is separated from the protection member.

Abstract: Provided is an electronic pen including an electronic pen body portion, an electronic pen housing being a cylindrical body housing the electronic pen body portion, a connector portion including a connector substrate, and a terminal portion including a base portion raised from the connector substrate in a direction crossing an axial direction and a contact portion extended to a back end side from a position separated from the connector substrate on a back end surface of the base portion, and a connector housing being a cylindrical body housing the connector portion and connected to a back end side of the electronic pen housing. A cross section of the connector housing in a direction orthogonal to the axial direction is substantially triangular. An axial center of the connector substrate coincides with an axial center of the electronic pen body portion when the connector housing is attached to the electronic pen housing.

Abstract: An electronic pen includes a casing, an opening portion formed on one side of the casing, a core body that projects outside of the casing through the opening portion, a pen module part, and a core body insertion member disposed in the casing and having a hollow space that houses the core body. The hollow space includes a hollow portion between an inner circumferential surface of the core body insertion member and an outer circumferential surface of the core body when the core body insertion member houses the core body, the hollow portion communicating, via the opening portion, with a first space external to the electronic pen. The hollow portion is separated from a second space in which the pen module part is disposed within the casing.

Abstract: A cartridge-type electronic pen main body includes a conductive center electrode and a peripheral electrode disposed around the center electrode. The peripheral electrode includes a tapered part on a pen tip side and a cylindrical shaped part on an opposite side along an axial direction. When the cartridge-type electronic pen main body is in use, one end of the center electrode forming a pen tip is projected to the outside from an opening of a cylindrical housing of an electronic pen, and a portion of the tapered part of the peripheral electrode is also projected to the outside such that both the one end of the center electrode and the portion of the tapered part of the peripheral electrode are projected beyond a distal end of the cylindrical housing to capacitively couple with a sensor surface while the cylindrical shaped part of the peripheral electrode remains within the cylindrical housing.

Abstract: In a case in which an electronic pen main unit made into a cartridge is held movably in a casing, electrical connections between the electronic pen main unit and electronic circuit components of the casing are reliably established. The electronic pen main unit is fitted to a fitting part disposed in a casing of an electronic pen in which the pen tip side is made to be an opening and is housed in a state of being movable in a hollow part of the casing by a movement mechanism that moves the fitting part in the axial center direction of the casing.

Abstract: A capacitive electronic pen includes a housing, a core body, and a peripheral electrode. In the capacitive electronic pen, the core body includes an electrode core formed of a conductor having a spherical section and a shaft center section. The spherical section of the electrode core is not surrounded by the peripheral electrode and is disposed on a tip (distal) end of the capacitive electronic pen protruding from one opening in the axial direction of the housing. The shaft center section of the electrode core has multiple portions that vary in thickness (a cross-section size) including a thin portion, which coupled with the spherical section, and a thick portion. When the core body is fitted to the core body holder, at least a portion of the shaft center section of the electrode core is thinner than the diameter of the spherical section of the electrode core.

Abstract: A highly reliable waterproof electronic pen includes a board holder in a board housing including a recessed portion having an opening over a lower surface of the recessed portion. A circuit board is housed in the recessed portion of the board housing. Circuit components easily affected by heat are installed on a first surface of the circuit board, and circuit components not easily affected by heat are installed on a second surface of the circuit board. A thermosetting resin formed over the second surface of the circuit board when the circuit board is housed in the recessed portion seals the opening over the lower surface of the recessed portion of the board housing.

Abstract: An electronic pen includes a circuit board disposed such that an axial direction of a casing is aligned with a longitudinal direction of the circuit board, an electronic circuit on the circuit board, and a battery having a columnar shape disposed on a side of the circuit board opposite to a pen tip side of the circuit board inside a hollow portion of the casing such that positive and negative electrode conductors protruding from an end surface of the battery extend toward the circuit board. The battery is disposed such that a separation space is formed between the end surface and an end portion of the circuit board and such that tip portions of the positive and negative electrode conductors are in contact with the circuit board. The circuit board and the tip portions of the positive and negative electrode conductors are electrically connected to each other by soldered portions.

Abstract: An electronic pen cartridge is replaceable with a refill of a stationery ballpoint pen such that the stationery ballpoint pen housing can be reused as the electronic pen housing. The electronic pen cartridge is of a capacitance type and includes a pen tip which is projectable from an opening on one side in an axial direction of the pen housing. Inside the tubular cartridge housing are an electronic circuit including a signal transmission circuit configured to generate a signal to be supplied to a position detection sensor, and a rechargeable power storage device configured to supply a power supply voltage to the electronic circuit. A coil is wound around a portion of the cartridge housing, the portion located at a position where there is room in the pen housing. The power storage device is charged by a current induced in the coil based on an externally supplied magnetic field.

Abstract: An electronic pen includes a casing, an opening portion formed on one side of the casing, a core body that projects outside of the casing through the opening portion, a pen module part, and a core body insertion member disposed in the casing and having a hollow space that houses the core body. The hollow space includes a hollow portion between an inner circumferential surface of the core body insertion member and an outer circumferential surface of the core body when the core body insertion member houses the core body, the hollow portion communicating, via the opening portion, with a first space external to the electronic pen. The hollow portion is separated from a second space in which the pen module part is disposed within the casing.

Abstract: Provided is an electronic pen with a cylindrical housing including an opening at an end portion of the housing on a pen tip side of the housing, a cylindrical member disposed in the housing and fixed to the housing at a part on the pen tip side of the housing, and a core body formed in a rod shape by a material containing a pigment, the core body including a body portion inserted into the cylindrical member through the opening of the housing and a pull-out portion configured to enable the core body to be pulled out of the housing. A diameter of the body portion of the core body inserted into the cylindrical member is larger than a difference between an outer diameter of the cylindrical member and an inner diameter of the cylindrical member.

Abstract: An electronic pen cartridge is replaceable with a refill of a stationery ballpoint pen such that the stationery ballpoint pen housing can be reused as the electronic pen housing. The electronic pen cartridge is of a capacitance type and includes a pen tip which is projectable from an opening on one side in an axial direction of the pen housing. Inside the tubular cartridge housing are an electronic circuit including a signal transmission circuit configured to generate a signal to be supplied to a position detection sensor, and a rechargeable power storage device configured to supply a power supply voltage to the electronic circuit. A coil is wound around a rear end portion of the cartridge housing on a side of the cartridge housing opposite from the pen tip side. The power storage device is charged by a current induced in the coil based on an externally supplied magnetic field.

Abstract: Provided is an electronic pen including an electronic pen main part including a first sealing member that covers circumference of a tip side of the electronic pen main part and a second sealing member disposed along an outer edge of the electronic pen main part at a position separate from a tip toward a rear end side of the electronic pen main part, and an inside body that is tubular and has an inner wall surface with which the first sealing member and the second sealing member come into contact through insertion of the tip side of the electronic pen main part into the inside body.