Pressure detection device

A pressure detection device of detecting a forced state of a deformable object, comprising:

• a body being a case of a deformable hollow structure, the body comprising a top portion and a support portion, the support portion being surrounded and connected with the top portion to form a columnar structure, hardness of the top portion being greater than hardness of the support portion, an inner surface and an outer planar surface being two opposite surfaces of the top portion, the outer planar surface being pressed by an external force, and an identifiable vision feature being a plurality of dots disposed on the same inner surface;
• an image sensor disposed inside the body and facing the inner surface of the body, and adapted to capture a frame containing the identifiable vision feature on the inner surface;
• a light source disposed under the body and on the same surface adjacent to the image sensor for facing the inner surface of the body, and adapted to project a beam onto the inner surface;
• and
• a processor electrically connected with the image sensor, and adapted to analyze position variation of the identifiable vision feature within the captured frame for identifying a gesture applied to the outer planar surface of the body is laterally shifting or obliquely pressing.