A multifunction pen includes plural refills including an electromagnetic induction touch pen. A knock operation to one of knock rods each of which is connected to a rear end of each of the plural refills causes a tip of one refill of the plural refills to move from a standby position in which the tip stays inside a shaft tube to an in-use position in which the tip projects from a tip end opening of the shaft tube. At least one refill from writing refills other than the electromagnetic induction touch pen is provided with a metal writing tip, and a tip of the electromagnetic induction touch pen at the in-use position is separated from the tips of the writing refills at the standby position by a distance such that electromagnetic induction by the electromagnetic induction touch pen is not affected by the tips of the writing refills.

A multifunction pen includes plural refills including an electromagnetic induction touch pen. A knock operation to one of knock rods each of which is connected to a rear end of each of the plural refills causes a tip of one refill of the plural refills to move from a standby position in which the tip stays inside a shaft tube to an in-use position in which the tip projects from a tip end opening of the shaft tube. At least one refill from writing refills other than the electromagnetic induction touch pen is provided with a metal writing tip, and a tip of the electromagnetic induction touch pen at the in-use position is separated from the tips of the writing refills at the standby position by a distance such that electromagnetic induction by the electromagnetic induction touch pen is not affected by the tips of the writing refills.

Disclosed is an electromagnetic fountain pen, which includes a pen core, a housing, and a pen body located in the housing, the housing includes a front housing and a rear housing, the pen body includes a first iron core and an iron core holder, the iron core holder is provided with a pen core clamp link, a second iron core, and a third iron core, coils are wound outside the first iron core and the second iron core, the first iron core is close to a pen tip of the pen core, the pen core is configured to pass through a center of the first iron core, and then is clamped by one end of the pen core clamp link.

Aspects of the present invention relate to external user interfaces used in connection with head worn computers (HWC).

Aspects of the present invention relate to external user interfaces used in connection with head worn computers (HWC).

Aspects of the present invention relate to external user interfaces used in connection with head worn computers (HWC).

Aspects of the present invention relate to external user interfaces used in connection with head worn computers (HWC).

Aspects of the present invention relate to external user interfaces used in connection with head worn computers (HWC).

Aspects of the present invention relate to external user interfaces used in connection with head worn computers (HWC).

A multifunction writing instrument comprising a body extending along an axial direction and receiving at least two retractable writing elements, each retractable writing element comprising a writing tip, a reservoir and a button, each retractable writing element being movable between a writing position in which the writing tip extends from the body and a retracted position in which the writing tip is retracted within the body, each retractable writing element being connected to an electronic unit in order to detect which retractable writing element is in the writing position.