Spliced pressure sensing device and splicable pressure sensing unit thereof

A spliced pressure sensing device, comprising:

• a plurality of splicable pressure sensing units, each of the splicable pressure sensing units including:
• a first flexible circuit board, having a plurality of first circuits extending along a first direction, each of the first circuits having a first end contact, a second end contact and a plurality of first sensing contacts connecting with the first end contact and the second end contact in series;
• a flexible spacer layer, having a first adherence surface and a second adherence surface opposite to each other, the first adherence surface adhered to the first flexible circuit board, the flexible spacer layer having a plurality of through holes and a plurality of air escape channels through the first adherence surface and the second adherence surface, each of the air escape channels respectively communicating with one of the through holes, each of the first sensing contacts respectively aligned with corresponding one of the through holes;
• and
• a second flexible circuit board, adhered to the second adherence surface and having a plurality of second circuits extending along a second direction perpendicular to the first direction, each of the second circuits having a third end contact, a fourth end contact and a plurality of second sensing contacts connecting with the third end contact and the fourth end contact in series, each of the second sensing contacts respectively aligned with corresponding one of the first sensing contacts through one of the through holes;
• and
• a flexible connecting component, having a plurality of first circuit contacts and a plurality of second circuit contacts, used to connect at least two of the splicable pressure sensing units adjacent to each other after at least two of the splicable pressure sensing units are spliced into a spliced pressure sensing device body, the first circuit contacts electrically connecting with the first circuit, the second circuit contacts electrically connecting with the second circuit;
• wherein, in the spliced pressure sensing device body, all of the first circuits electrically connect with each other, and all of the second circuits electrically connect with each other.