A mechanical key unlocking mechanism

By designing a mechanical key unlocking mechanism that combines a lock tongue, an opening lever, a pull rod, and a key lever assembly, the independence of electric and mechanical unlocking is achieved, solving the mechanical unlocking problem when there is insufficient power and meeting the requirements of independent unlocking by the vehicle logic and the key.

CN224282257UActive Publication Date: 2026-05-26DEERFU VEHICLE LOCK ANTI THEFT SYST SHANGHAI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
DEERFU VEHICLE LOCK ANTI THEFT SYST SHANGHAI
Filing Date
2025-05-09
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing automotive door lock systems conflict with electrification and mechanization, making it impossible to unlock with a mechanical key when power is insufficient, and failing to meet the requirement of independent unlocking by the vehicle logic and key.

Method used

A mechanical key unlocking mechanism was designed, comprising a lock tongue, an opening rod, a pull rod, an external opening component, a key rod component, and a transmission mechanism. It achieves both electric and mechanical unlocking functions through independent control of the mechanical key and motor, ensuring that the key can still be used to unlock the device when power is insufficient.

Benefits of technology

It enables unlocking via mechanical key even when power is insufficient, while also meeting the requirements of independent unlocking by the vehicle logic and key, ensuring that the car door locks work independently in electric and mechanical modes without conflict.

✦ Generated by Eureka AI based on patent content.

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Abstract

This utility model provides a mechanical key unlocking mechanism, belonging to the field of automotive door lock technology. It includes a latch mounted on a housing, the latch being actuated by an opening rod, which is actuated by a transition rod. The mechanical key unlocking mechanism also includes a pull rod assembly, comprising a pull rod that slides on the housing and rotates in conjunction with the transition rod. The pull rod has a pull rod limiting end b. An external opening assembly rotates on the housing, actuating the transition rod to rotate. This utility model provides a motor vehicle door lock with an electrically independent unlocking external safety mechanism and a retained mechanical unlocking safety mechanism. The central control part of this mechanism is equipped with an independent motor and transmission mechanism, and also has a transmission mechanism for the mechanical unlocking safety mechanism, which do not conflict with each other; it can be used with the vehicle control logic and also meets the user's need for independent unlocking using a key.
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