Abstract: A routing layout design device and a routing layout design method are provided. The routing layout design method includes: reading multiple pin information and multiple lead rule information of a circuit board; selecting multiple outer row pins located on an outer edge of the circuit board according to the multiple pin information; generating multiple outer row leads from multiple outer row pins along a direction perpendicular to the outer edge; establishing multiple triangles with the pins as vertices through an algorithm, and selecting a plurality of first pins respectively located in the same triangle as the plurality of outer row pins; coupling the outer row leads to the first pins according to a plurality of lead limiting area, the triangles and the plurality of lead rule information; generating a lead data according to a coupling relationship of the first pins coupled to the outer row leads.

Abstract: A tourniquet includes an elastic band including uneven top and bottom surface. The uneven surface includes rows of a plurality of spaced first uneven zones and rows of a plurality of spaced second uneven zones. The first uneven zone is disposed between two adjacent ones of the second uneven zone. The second uneven zone is disposed between two adjacent ones of the first uneven zone. The first and second uneven zones are concave rectangular. Each uneven zone includes two raised, opposite inclined edges and the other two raised, opposite inclined edges. A ridge is formed between two adjacent inclined edges of different uneven zones.

Abstract: The present invention discloses a routing method for a circuit board, which is suitable for planning a plurality of traces to connect a plurality of first contacts of a first trace layer and a plurality of second contacts of a second trace layer, and at least includes the following steps: providing a plurality of virtual paths between the first contacts and the second contacts, and providing a plurality of virtual grid points on the virtual paths; setting a plurality of first serial numbers of the first contacts and a plurality of second serial numbers of the second contacts; dividing the traces into a first group, a second group and a third group according to a plurality of contact serial number differences between the second serial numbers and the first serial numbers; and providing a via hole of each trace on the virtual grid point.

Abstract: A routing method of a printed circuit board and an electronic device are disclosed. The routing method includes: obtaining design information which includes a plurality of element pins of at least one circuit element and a plurality of electrical pins on the printed circuit board; arranging a plurality of bus paths according to the design information, wherein each of the bus paths is adapted for arranging a plurality of wirings to connect the element pins and corresponding electrical pins; calculating a plurality of bus spacings, wherein each of the bus spacings is between one of the bus paths and adjacent one of the bus paths; adjusting the bus paths according to the bus spacings and a preset distance; and arranging the wirings in each of the adjusted bus paths according to the design information.

Abstract: A tourniquet is presented with a strap including two patterns of cavities and ridges on top and bottom surfaces respectively. The pattern includes a plurality of spaced cavities arranged in parallel rows, the cavity being rectangular and including two first slopes on two short sides respectively and two second slopes on two elongated sides respectively, the first slopes having an elevation greater than that of the second slopes, and the second slopes having an inclined degree greater than that of the first slopes; and a plurality of spaced depressions arranged in parallel rows, the depression being adjacent to the cavity widthwise, the depression being rectangular, and the depression including two third slopes on two short sides respectively and two fourth slopes on two elongated sides respectively. Depths of the cavity and the depression are different.