US 11,809,645 B2
Electronic pen
Kenichi Ninomiya, Kanagawa (JP); Takayuki Arai, Saitama (JP); Kohei Tanaka, Tokyo (JP); and Takenori Kaneda, Saitama (JP)
Assigned to Wacom Co., Ltd., Saitama (JP)
Filed by Wacom Co., Ltd., Saitama (JP)
Filed on May 20, 2022, as Appl. No. 17/750,008.
Application 17/750,008 is a continuation of application No. 17/065,375, filed on Oct. 7, 2020, granted, now 11,379,057.
Application 17/065,375 is a continuation of application No. 16/441,182, filed on Jun. 14, 2019, granted, now 10,802,616, issued on Oct. 13, 2020.
Application 16/441,182 is a continuation of application No. 15/654,356, filed on Jul. 19, 2017, granted, now 10,365,733, issued on Jul. 30, 2019.
Claims priority of application No. 2016-145522 (JP), filed on Jul. 25, 2016.
Prior Publication US 2022/0276731 A1, Sep. 1, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/0354 (2013.01); G06F 3/033 (2013.01); G06F 3/048 (2013.01)
CPC G06F 3/03545 (2013.01) [G06F 3/033 (2013.01); G06F 3/048 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An electronic pen comprising:
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 pressure detector which, in operation, detects a capacitance that changes according to a pen pressure applied to the core body;
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 including 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, and the hollow portion separated from a second space in which the pen module part is disposed within the casing,
wherein an end of the core body insertion member in an axial direction of the electronic pen includes a barrier that closes the hollow space of the hollow portion.