A time delay unlocking mechanism and a ground spring

By designing a delayed unlocking mechanism and utilizing the combination of one-way and two-way dampers, the problem of the door closer closing quickly and affecting entry and exit is solved, and the door leaf is kept open for a certain period of time, improving the convenience of use.

CN224496175UActive Publication Date: 2026-07-14JIEYANG SHENGHONG INTELLIGENT TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
JIEYANG SHENGHONG INTELLIGENT TECHNOLOGY CO LTD
Filing Date
2025-08-14
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Existing door closers can impede people's, especially the elderly and children, from entering and exiting when the door is pushed back quickly to close, particularly in frequently used places such as conference rooms and offices.

Method used

Design a delayed unlocking mechanism, including a housing, a one-way damper, and a two-way damper. Through the cooperation of a linkage shaft and a compression spring, the door leaf can remain open for a certain period of time after it is opened. The time difference between the rapid locking of the one-way damper and the slow unlocking of the two-way damper provides time for people to enter and exit.

Benefits of technology

This design allows the door to remain open for a period of time after it is opened, preventing it from closing quickly, giving people enough time to enter and exit, and reducing the impact on the elderly and children.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a kind of delay unlocking mechanism, including shell, one-way damper and two-way damper;First compression spring is sleeved on the first piston rod of one-way damper, second compression spring is sleeved on the second piston rod of two-way damper;Linkage shaft is arranged on the first piston rod end portion, inclined slot is arranged on the second piston rod end portion, the end portion of linkage shaft is towards second piston rod and is matched with inclined slot;First compression spring drives first piston rod to move outward quickly, linkage shaft slides along inclined slot, drives first piston rod to rotate, closes one-way damper oil hole, locks first piston rod;Second compression spring overcomes two-way damper resistance and promotes second piston rod to move slowly outward, so that linkage shaft reversely slides along inclined slot and drives first piston rod to rotate reversely, opens one-way damper oil hole, removes first piston rod lock;There is delay unlocking time, and play the role of delay unlocking.
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