Electronic pen

Patent metadata

Field	Value
Publication number	US-10761620-B2
Application number	US-201816028333-A
Country	US
Kind code	B2
Filing date	Jul 5, 2018
Priority date	Feb 5, 2016
Publication date	Sep 1, 2020
Grant date	Sep 1, 2020

Abstract

An electronic pen includes an ink writing section including a core body and an ink holding section configured to hold an ink that is supplied to the core body, a circuit board, a transmission section which, in operation, transmits a signal, a connection member including a first side that holds an end portion of the ink writing section, on a side of the ink writing section opposite to the core body, and a second side that holds a first end portion of the circuit board, a pen pressure detector provided adjacent to a second end portion of the circuit board, and a casing configured to accommodate the ink writing section, the connection member, the circuit board and the pen pressure detector such that a tip portion of the core body protrudes from the casing.

First claim

What is claimed is:

1. An electronic pen comprising:
an ink writing section including a core body and an ink holding section configured to hold an ink that is supplied to the core body;
a circuit board;
a transmission section which, in operation, transmits a signal;
a connection member including a first side that holds an end portion of the ink writing section, on a side of the ink writing section opposite to the core body, the connection member also including a second side that holds a first end portion of the circuit board;
a pen pressure detector provided adjacent to a second end portion of the circuit board; and
a casing configured to accommodate the ink writing section, the connection member, the circuit board and the pen pressure detector, wherein a tip portion of the core body protrudes from the casing,
wherein the transmission section is fixed to the core body,
wherein the transmission section is disposed closer to the core body than the ink holding section,
wherein the ink holding section is disposed between the transmission section and the circuit board, and
wherein at least the ink writing section, the connection member and the circuit board move according to a pen pressure exerted on the core body.

2. The electronic pen according to claim 1 ,
wherein at least the ink writing section, the connection member and the circuit board move according to the pen pressure exerted on the core body, and transmit the pen pressure to the pen pressure detector.

3. The electronic pen according to claim 1 , further comprising:
a rigid tubular member configured to accommodate the circuit board therein,
wherein the rigid tubular member has a side opening that enables an operation to be conducted on the circuit board accommodated therein, and is fitted to the connection member at an end portion on one side of the tubular member in regard to an axial direction of the tubular member.

4. The electronic pen according to claim 1 , wherein:
the electronic pen is an electromagnetic induction system,
the transmission section includes a coil provided around the core body,
a resonance circuit is formed by connecting the coil and an electronic circuit including a capacitor formed on the circuit board, and
the signal is transmitted to a position detecting device through the coil.

5. The electronic pen according to claim 1 , wherein:
the electronic pen is a capacitive system,
the transmission section is integral with the core body,
an electronic circuit having an oscillation circuit is configured on the circuit board,
the electronic circuit and the core body are electrically connected, and
the signal is from the oscillation circuit and is transmitted to a position detecting device through the core body.

6. The electronic pen according to claim 1 ,
wherein the pen pressure detector is a variable capacitor having a capacitance that varies according to the pen pressure exerted on the core body.

7. The electronic pen according to claim 6 ,
wherein the variable capacitor is configured as a micro electro mechanical system chip including a semiconductor device.

8. The electronic pen according to claim 1 ,
wherein the electronic pen is configured in a same shape as that of a refill that is accommodated in a ball-point pen casing.

9. The electronic pen according to claim 1 ,
wherein the electronic pen is configured in a same shape as that of a refill that is accommodated in a multifunctional pen casing.

Assignees

• Wacom Co Ltd

Inventors

• Kaneda Takenori
• Ninomiya Kenichi
• Tanaka Kohei

Classifications

• B43K24/163

  with one push-button for each writing unit · CPC title

• G06F3/03546

  using a rotatable ball at the tip as position detecting member · CPC title

• B43K7/02

  Ink reservoirs; Ink cartridges (B43K7/01 takes precedence) · CPC title

• B43K29/08

  with measuring, computing or indicating devices · CPC title

• G06F3/046

  by electromagnetic means · CPC title