Expander

An expander, comprising:

• a first handle, comprising a first gripping portion, a first pivoting portion, a first connecting portion, and an expanding compass, wherein one of two ends of the first pivoting portion is connected to the first gripping portion, and the first connecting portion is extending from the other end of the first pivoting portion, the expanding compass is extending from the first gripping portion;
• a second handle, comprising a second gripping portion, a second pivoting portion, and a second connecting portion, wherein the second gripping portion comprises a thru groove corresponding to the expanding compass, so that the expanding compass is inserted into the thru groove, the second pivoting portion is pivoted to the first pivoting portion, wherein the second gripping portion is extending from one of two ends of the second pivoting portion, the second connecting portion is extending from the other end of the second pivoting portion, and an extension direction of the second connecting portion is not parallel to an extension direction of the second gripping portion;
• a first supporting member connected to the first connecting portion;
• and
• a second supporting member connected to the second connecting portion;
• wherein when the second gripping portion is moved toward the first gripping portion along the expanding compass, the second gripping portion drives the second supporting member to move away from the first supporting member.