Electronic cigarette case

An electronic cigarette case, comprising a box body (1), a box cover (2) hinged to the box body (1), and an opening and closing mechanism, the opening and closing mechanism including a spring piece (31) built in the box body (1) and an arc-shaped bulge (33) formed on the box cover (2), the arc-shaped bulge (33) clamped between the spring piece (31) and an inner wall of the box body (1) and slidingly contacting with the spring piece (31);

• wherein when the box cover (2) rotates a first predetermined angle relative to said box body (1), the spring piece (31) pushes the arc-shaped bulge (33), which makes the arc-shaped bulge (33) slidingly contacting relative to the spring piece (31) until the box cover (2) is fully open;
• when the box cover (2) rotates a second predetermined angle relative to the box body (1), the spring piece (31) pushes the arc-shaped bulge (33), which makes the arc-shaped bulge (33) slidingly contacting relative to the spring piece (31) until the box cover (2) is fully closed;
• said opening and closing mechanism further comprises a spring (32) built in the box body (1) horizontally, and two ends of the spring (32) are fixed to the box body (1) and the spring piece (31) respectively;
• and
• the spring piece (31) comprises a bending part (311), a part of said bending part (311) protrudes to form a bridge-shaped fixing position (312), and an end of the spring (32) passes through the bending part (311) and is secured to the spring piece (31).