US 2026/0256266 A1Published application

Plastic hinge shaft having elastic deformation

AssigneeZhuhai Ding Rong Plastic Products Co., LTD

InventorHUI HUI ZHANG

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Abstract

A plastic cosmetic container having elastic deformation includes a container lid including a knuckle and two aligned first holes through the knuckle; a base including a cavity corresponding to the knuckle, and two aligned second holes through the cavity; and a hinge assembly including two hinge shafts including a groove. The hinge shafts are inserted through the second holes and the first holes to pivotably secure the container lid to the base. The provision of the groove provides a space for accommodating thermal expansion so that a diameter of the hinge shaft does not change. There is no gap between the hinge shaft and each hole. A sufficient friction is generated on the hinge shafts when the container lid is opened. An angle of the open container lid with respect to the base can be kept. Otherwise, the container may close. It increases convenience in use.

Claims8

Dependent claims

A plastic cosmetic container having elastic deformation, comprising:

a container lid including a knuckle extending downward from an edge of an outer surface, and two aligned first holes through two ends of the knuckle respectively;
a base configured to close or open the container lid and including a cavity corresponding to the knuckle and being complementary thereto, and two aligned second holes through two ends of the cavity respectively, the second holes being aligned with the first holes;
and
a hinge assembly including two hinge shafts made of plastic and being cylindrical, each of the hinge shafts including a groove wherein the groove extends from an outer surface of the hinge shaft to an axial center of the hinge shaft, a width of the groove is gradually increased from a bottom to an opening thereof, and the hinge shafts are inserted through the second holes and the first holes to pivotably secure the container lid to the base.

1 more element

Dependencies are inferred from the claim text.