BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to an operation input device and a door handle.

2. Description of the Related Art

On a door of a car for example, a door handle for opening and closing a door is provided outside a car. A control device for opening and closing a vehicle door that enables an operation such as opening and closing a door of a car or the like by a touch on a door handle is disclosed (for example, Patent Document 1).

Specifically, in such a control device for opening and closing a vehicle door, touching a door handle or the like with a hand and moving the hand that touched the door handle can perform an operation such as opening and closing a door.

However, in a control device for opening and closing a vehicle door or the like, when it is assumed that inputting information by a gesture performs an operation of opening and closing a vehicle door, false detection may be caused because there are variations among operators or the like in a gesture operation, and it is not possible to accurately determine whether an input of a gesture operation is performed.

Thus, in a gesture operation, an operation input device having low variations among operators or the like, is desired.

RELATED-ART DOCUMENTS

Patent Document

Patent Document 1: Japanese Laid-Open Patent Publication No. 2009-79353

Patent Document 2: Japanese Laid-Open Patent Publication No. 10-308148

SUMMARY OF THE INVENTION

According to one aspect of an embodiment, an operation input device includes a substrate formed of an insulator, a plurality of detecting electrodes provided on a surface of the substrate, and a controller, wherein the controller detects capacitance generated between each of the plurality of detecting electrodes and an operation body when the operation body is positioned in proximity to the substrate, and determines that a gesture operation by the operation body is performed when a duration from when the capacitance becomes greater than or equal to a first threshold to when the capacitance becomes greater than or equal to a second threshold is greater than or equal to a predetermined value, or when a length in which the operation body is moved from when the capacitance becomes greater than or equal to the first threshold to when the capacitance becomes greater than or equal to the second threshold is greater than or equal to a predetermined value, the first threshold being a threshold for the capacitance, and the second threshold being greater than the first threshold.

