Artificial shuttlecock and feather and preparation method thereof

A method for preparing a feather for an artificial shuttlecock, wherein the artificial shuttlecock comprises a ball head, a plurality of stems and a plurality of feathers, each one of the plurality of stems has one end inserted into the ball head and another end connected with one of the plurality of feathers respectively, the method for preparing the feathers comprising the following steps of:

• obtaining the feather having a kite shape, wherein the feather comprises a connecting portion, a first portion, and a second portion, the connecting portion is connected to one of the plurality of stems, the first portion and the second portion are disposed on the opposite sides of the connecting portion respectively;
• piercing through the first portion to form a first opening;
• defining an overlapped outline in the second portion, which is the outline of the adjacent feathers overlapping on the second portion;
• defining a reference point, which is a point where the overlapped outline is closest to the connecting portion;
• defining a shifting reference line in the second portion, which passes through the reference point and is parallel to the connecting portion;
• defining a reference outline in the second portion, wherein the reference outline has the same configuration as that of an outline of the first portion, and the reference outline is located outside the shifting reference line;
• and
• cutting the reference outline to form a concave.

An artificial shuttlecock comprising:

• a ball head;
• a plurality of stems, each one of the plurality of stems having one end inserted into the ball head;
• and
• a plurality of feathers, each one of the plurality of feathers being connected to another end of each one of the plurality of stems respectively, each one of the plurality of feathers comprising:
• a connecting portion being connected to one of the plurality of stems;
• a first portion and a second portion disposed on the opposite sides of the connecting portion respectively;
• a first opening disposed in the first portion, and
• a concave located at an outer edge of the second portion and formed by the following steps of:
• defining an overlapped outline, which is the outline of the adjacent feathers overlapping on the second portion;
• defining a reference point, which is a point where the overlapped outline is closest to the connecting portion;
• defining a shifting reference line, which passes through the reference point and is parallel to the connecting portion;
• defining a reference outline in the second portion, wherein the reference outline has the same configuration as that of an outline of the first portion, and the reference outline is located outside the shifting reference line;
• and
• cutting the reference outline to form the concave.