Electronic eraser

1 . An electronic eraser comprising:

an electronic pen unit that includes:

a core body; and

a pressure detector that, in operation, detects a pressure applied to the core body and sends an erasing signal including pressure information detected by the pressure detector;

a housing having a substantially rectangular parallelepiped shape; and

a corner member that is integral with the housing, is separable from the housing, and has a square pyramid shape having a triangular side surface configuring a part of a bottom surface of the housing,

wherein the core body of the electronic pen unit is inserted into a portion of a central axis coincident with a perpendicular line drawn from a vertex of the corner member to a bottom surface of the corner member, and the electronic pen unit is obliquely arranged in the housing, so that the corner member is slidable and movable in a direction of the central axis.

2 . The electronic eraser according to claim 1 ,

wherein regulation parts regulating rotation of the corner member are provided on the bottom surface of the corner member and a surface of the housing facing the bottom surface of the corner member.

3 . The electronic eraser according to claim 1 ,

wherein, among a length in a longitudinal direction, a length in a lateral direction, and a length in a depth direction of the housing, the length in the depth direction is shorter than the length in the longitudinal direction and the length in the lateral direction.

4 . The electronic eraser according to claim 1 ,

wherein the core body is electrically conductive, and the electronic pen unit is of an active capacitance type system including a transmission circuit that, in operation, generates the erasing signal and supplies the erasing signal to the core body, and a power supply circuit that, in operation, supplies driving electric power to the transmission circuit.

5 . The electronic eraser according to claim 4 ,

wherein the power supply circuit includes a secondary power supply element that, in operation, is charged by receiving power supply from outside of the electronic eraser.

6 . The electronic eraser according to claim 4 ,

wherein the power supply circuit includes a button battery.

7 . The electronic eraser according to claim 4 ,

wherein a void is provided between the bottom surface of the corner member and a surface of the housing facing the bottom surface of the corner member, and

wherein a peripheral electrode that, in operation, receives a predetermined signal is arranged around the core body, and part of the peripheral electrode is exposed from the void.

8 . The electronic eraser according to claim 1 ,

wherein an outer edge of the housing having a substantially rectangular parallelepiped shape is configured with a side in a longitudinal direction, a side in a lateral direction, and a side in a depth direction, and

wherein the electronic pen unit is provided in the housing so that the core body divides an angle formed by the side in the longitudinal direction and the side in the lateral direction into two equal parts.

9 . The electronic eraser according to claim 1 ,

wherein the side surface of the corner member is coated with resin.

10 . The electronic eraser according to claim 1 ,

wherein the corner member is replaceable.

11 . The electronic eraser according to claim 1 ,

wherein the housing is covered with a sleeve.

12 . The electronic eraser according to claim 4 ,

wherein the housing is covered with a sleeve having conductivity.

13 . The electronic eraser according to claim 1 ,

wherein a tip portion of the corner member is configured to be rounded.

14 . The electronic eraser according to claim 1 ,

wherein the square pyramid shape of the corner member has four triangular side surfaces on the bottom surface of the corner member.

15 . The electronic eraser according to claim 14 ,

wherein the four triangular side surfaces include a first triangular side surface, a second triangular side surface, a third triangular side surface, and a fourth triangular side surface, and

wherein a base of each of the third triangular side surface and the fourth triangular side surface is longer that a base of each of the first triangular side surface and the second triangular side surface.

16 . The electronic eraser according to claim 1 ,

wherein the corner member includes a first regulation part and a second regulation part that extend outwardly from the bottom surface of the corner member,

wherein the housing includes a first recess part and a second recess part formed in a surface of the housing, and

wherein, while the corner member is attached to the housing that a first regulation part is fitted into the first recess part and the second regulation part is fitted into the second recess part.