CROSS-REFERENCE TO RELATED APPLICATIONS

This application is the National Phase of PCT International Application No. PCT/US2018/057535 filed on Oct. 25, 2018. The entire disclosure of the above application is all incorporated herein by reference.

BACKGROUND OF THE INVENTION

Field of the Invention

The technical field relates to a suction cup, in particular, to the structure of a suction cup using an insertion pin for lifting the suction cup.

Description of Related Art

Presently, suction cups have become one of the products commonly used in households and our daily lives, and they mainly utilize vacuum for attaching onto wall surfaces or any flat surfaces. Typically, a suction cup is provided with a hook extended therefrom, and the hook can provide the function for object hanging. Nevertheless, known suction cups are found to have defects, and the main cause of such defects is due to the excessive softness of suction cup or existence of gap allowing external air to enter into the inner side of the suction cup such that the suction force of the suction cup is insufficient, leading to falling of the suction cup.

Known suction cup typically uses an elastic material, and after a long term of use, elastic fatigue is likely to occur such that gap is generated and air is able to penetrate into the internal of the cup, causing the suction force to reduce. As a result, the suction cup cannot be stably attached onto the wall or any flat surface, and the object hung on the wall with the suction cup also falls, leading to damage of object.

SUMMARY OF THE INVENTION

An objective of the present invention is to provide a suction cup, comprising: a suction cup member, a press ring, a first housing and an insertion pin. The suction cup member includes an assembly surface and a suction surface. The assembly surface includes a first protrusion arranged thereon, and one side of the first protrusion includes a first cut-out slot formed thereon. The press ring is pressed onto the assembly surface of the suction cup member. The first housing is pressed onto a top portion of the press ring. The first housing includes a second protrusion arranged thereon. The second protrusion is mounted onto the first protrusion, and one side of the second protrusion includes a first through hole formed thereon corresponding to the first cut-out slot. The insertion pin includes an end portion formed with an inclination, and the insertion pin partially engages with a top portion of the first housing. In addition, the insertion pin uses the end portion with the inclination to slidably engage with the first cut-out slot to cause the first protrusion to move upward and to drive the suction cup member to move upward at the same time in order to allow the suction surface to form a vacuum space at a lower portion thereof.

The technical effect of the present invention is to use the insertion pin for securing the suction cup member in order to maintain the vacuum space such that it is able to prevent elastic fatigue that may cause the falling of the suction cup member. Consequently, the suction cup of the present invention is able to stably attach onto an object surface.

