A multi-stage screw with a round head

CN224339302UActive Publication Date: 2026-06-09NINGBO FATE FASTENER CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
NINGBO FATE FASTENER CO LTD
Filing Date
2025-09-05
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Traditional screws have a one-piece screw structure, which cannot flexibly adjust the length or change different thread specifications, resulting in reduced connection stability, and the entire screw is scrapped when the screw head is damaged.

Method used

A multi-segment screw with round head is designed. Through the sliding fit between the limiting block and the limiting groove and the elastic snap-fit ​​structure of the fixing component, the first screw and the second screw can be quickly assembled and disassembled. The screw head can be quickly replaced through the insertion fit between the positioning block and the fixing plate.

Benefits of technology

It enables the replacement of second screws of different lengths or thread specifications according to the thickness and hardness of the materials being connected, reducing usage costs and allowing for quick replacement when the screw head is damaged, ensuring the stability of the screw structure.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN224339302U_ABST
    Figure CN224339302U_ABST
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Abstract

The utility model relates to screw technical field, concretely is a kind of round head screw of multistage screw rod, it includes: support column, the bottom fixed mounting of support column has first screw rod, the bottom of first screw rod is provided with second screw rod, the top of second screw rod is fixedly installed with limit block, the bottom of first screw rod is provided with limit slot, the top of limit block extends into limit slot, the bottom of second screw rod is fixedly installed with conical end portion;Fixed assembly, fixed assembly is located in limit block, and for fixing limit block in limit slot;Fixed disc, fixed disc is fixedly installed at the top of support column, the top of fixed disc is provided with positioning slot, the quick assembly and disassembly of first screw rod and second screw rod are realized, according to the thickness, hardness of the material to be connected change different length or thread gauge's second screw rod, without replacing whole screw, reduce use cost, when screw head appears damage when using, can be quickly replaced, ensure the stability of entire screw structure.
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