Electronic erasing device and writing information processing system

A writing information processing system comprising:

• an electronic device including a display device and a position detection device;
• and
• an electronic erasing device including:
• a casing,
• an erasing portion slidably attached to the casing and having a bottom surface and a side surface that extends from an outer edge of the bottom surface, both the bottom surface and at least a part of the side surface protruding from an end of the casing, and
• a position indicator including a core body and a pressure detector which, in operation, detects a pressure applied to the core body, the position indicator being configured to output a position indication signal indicating an erasure position indicated by the core body and information indicating the pressure detected by the pressure detector,
• wherein the position indicator is included in the erasing portion and fixed inside the casing such that a tip portion of the core body is positioned away from an outer side of the bottom surface of the erasing portion and such that the pressure applied to the erasing portion is transmitted to the core body,
• wherein the electronic device further includes a display processor which, in operation, causes an erasure area to be displayed on the display device based on a detection output received from the position detection device, and
• wherein the erasure area is formed when the erasing portion is brought into contact with an operation surface of the electronic device with the casing having a tilt at a predetermined angle to the operation surface, and a point of contact on the operating surface by the erasing portion and a position on the operation surface detected by the position detection device approach each other according to the tilt of the casing.

A writing information processing system comprising:

• an electronic device including a display device and a position detection device;
• and
• an electronic erasing device including:
• a casing,
• an erasing portion slidably attached to the casing and having a bottom surface and a side surface that extends from an outer edge of the bottom surface, both the bottom surface and at least a part of the side surface protruding from an end of the casing, and
• a position indicator including a core body and a pressure detector which, in operation, detects a pressure applied to the core body, the position indicator being configured to output a position indication signal indicating an erasure position indicated by the core body and information indicating the pressure detected by the pressure detector,
• wherein the position indicator is included in the erasing portion and fixed inside the casing such that a tip portion of the core body is positioned away from an outer side of the bottom surface of the erasing portion and such that the pressure applied to the erasing portion is transmitted to the core body,
• wherein the electronic device further includes a display processor which, in operation, causes an erasure area to be displayed on the display device based on a detection output received from the position detection device, and
• wherein, in response to the casing being rotated with the casing having a tilt at a predetermined angle, the display processor causes the erasure area to change and be displayed according to a rotation position of the casing.