Patent ID: 11905075
Assignee: nan
Field: Handling (Mechanical engineering)
Classification: CPC B | IPC B

Claim 0:
1. A tamper-evident container, comprising:
a container body having a first hollow convex loop that surrounds a periphery of an opening thereof; and
a lid having a second hollow convex loop and a force application structure, wherein the second hollow convex loop surrounds a peripheral edge of the lid and is used to engage with the first hollow convex loop, the force application structure is located in an area surrounded by the second hollow convex loop, and a loop-shaped breakable line is provided on a middle of a loop-shaped topmost surface of the second hollow convex loop that surrounds a peripheral edge of the lid;
wherein, when the lid is positioned on the container body and the loop-shaped breakable line is located in a pre-broken position, the second hollow convex loop engages and is located on an exterior of a top and an outermost peripheral edge of the first hollow convex loop of the container body, the top and the outermost peripheral edge of the first hollow convex loop being spaced apart, the top and the outermost peripheral edge of the first hollow convex loop of the container body are located entirely within the second hollow convex loop of the lid, the second hollow convex loop has an outer peripheral flange located on an outermost peripheral edge of the second hollow convex loop and positioned parallel with a top surface of the lid, the outer peripheral flange extends outwardly and horizontally beyond the container body, the loop-shaped breakable line and the second hollow convex loop are located entirely outside the container body and cover an outer most part of the opening and the first hollow convex loop of the container body and the outer peripheral flange extends outwardly and horizontally beyond the container body;
wherein, when in a normal opening operation, the force application structure is used for a user to apply a longitudinal force of pull or press thereon to break the loop-shaped breakable line located on the middle of the loop-shaped topmost surface of the second hollow convex loop, and the tamper-evident container provides an effective lever structure formed between the force application structure and the loop-shaped breakable line, the effective lever structure having a fulcrum at a foot of an inner wall of the first hollow convex loop, and a lever arm for the force application structure being much larger than a lever arm for the loop-shaped breakable line, so that an area enclosed by the loop-shaped breakable line can be easily removed from the lid; and when an illegitimate user applies a lifting force on any local area of the second hollow convex loop of the lid to make the local area moving upward with a displacement exceeding a threshold to separate the second hollow convex loop of the lid from the outermost peripheral edge of the first hollow convex loop of the container body, a corresponding local area of the loop-shaped breakable line will be broken to show that the tamper-evident container has been tampered with.