Angle-adjustable crowbar

An angle-adjustable crowbar, comprising:

• a crowbar body and a crowbar head, a first hinge base and a second hinge base being disposed at an end of the crowbar head in a spaced manner, wherein a head of the crowbar body is rotatably mounted between the first hinge base and the second hinge base through an angle adjustment mechanism;
• the angle adjustment mechanism comprises a limit shaft penetrating through the first hinge base, the crowbar body and the second hinge base, the limit shaft comprises a first tooth portion, a polygonal limit portion and a second tooth portion sequentially disposed on an outer wall of the limit shaft in an axial direction of the limit shaft,
• wherein the limit shaft further comprises an end portion having a threaded groove,
• wherein a tip diameter of the second tooth portion is less than an inscribed circle diameter of the polygonal limit portion, and a circumscribed circle diameter of the polygonal limit portion is less than a root diameter of the first tooth portion, and
• wherein the second tooth portion lies between the polygonal limit portion and the end portion, and the tip diameter of the second tooth portion is greater than a diameter of the end portion,
• a first tooth socket matched with the first tooth portion is formed in an inner wall of the first hinge base, a polygonal slot matched with the polygonal limit portion is formed in the head of the crowbar body, and a second tooth socket matched with the second tooth portion is formed an inner wall of the second hinge base;
• and
• a fastener is connected to the end portion, close to the second tooth portion, of the limit shaft in a threaded manner, and is able to push the limit shaft to slide in the axial direction.