Shift Lever Anti-Theft Bracket with Cable Constraint
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Solution Overview
Problem
Current anti-theft systems for vehicles are complex and costly, and they fail to prevent theft when the shift lever is forcibly operated by detaching the console and manipulating the shift cable, allowing the vehicle to be moved despite being in the 'P' stage.
Innovation Solution
An anti-theft apparatus for the shift lever that includes a mounting bracket with a penetration hole and an insert groove to secure the shift cable, along with fixing pins and a lever plate to prevent lateral movement and detachment, ensuring the shift lever remains in the 'P' stage and cannot be forcibly operated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mounting bracket with penetration hole and insert groove is added to secure the shift cable, then the anti-theft reliability is improved, but the device complexity increases
Solution Approach 1:
The mounting bracket is divided into distinct functional segments: a penetration hole section for cable passage, an insert groove section for socket engagement, and fixing pin sections for lateral constraint. This segmentation allows each component to perform its specific function independently while collectively providing comprehensive security against theft attempts.
Solution Approach 2:
The mounting bracket is pre-configured with the penetration hole, insert groove, and fixing pin positions during manufacturing. This preliminary arrangement ensures that when the bracket is installed, the shift cable is automatically secured in the correct configuration without requiring additional assembly steps or adjustments, thereby improving reliability while maintaining ease of installation.
2Stability of the object's composition
If fixing pins are used to limit lateral movement of the shift cable, then the shift lever position stability is improved, but the ease of operation deteriorates
Solution Approach 1:
The fixing pins act as intermediary elements between the mounting bracket and the shift cable. They provide lateral constraint to prevent unauthorized movement while allowing the authorized shift operation to proceed through the designed path. The pins are positioned to constrain only lateral displacement, permitting the intended longitudinal movement during normal shifting operations.
Solution Approach 2:
The fixing pins provide localized constraint only at specific points where lateral movement occurs, rather than restricting all movement of the shift cable. This localized approach maintains stability against theft attempts while preserving the ease of operation for authorized shifting, as the cable can still move freely in the directions required for normal operation.
3Ease of operation
If the penetration hole is made larger than the cable diameter, then the ease of operation is improved, but the reliability deteriorates
Solution Approach 1:
The penetration hole dimensions are optimized in multiple dimensions: sufficiently large in the longitudinal direction to allow easy cable passage and movement during shifting operations, but constrained in the lateral direction by the fixing pins to prevent unauthorized lateral displacement. This multi-dimensional dimensioning resolves the contradiction between ease of operation and anti-theft reliability.
Solution Approach 2:
The penetration hole parameters (diameter and length) are specifically adjusted to different values in different orientations. The hole is enlarged in the direction of authorized cable movement to improve ease of operation, while the fixing pin placement compensates by maintaining lateral constraint, thus achieving both operational ease and security reliability through parameter optimization.
Data Source
AI summary
An anti-theft apparatus of a shift lever for a vehicle includes: a shift lever case having a shift lever which is connected with a shift cable and a mounting portion fixing a socket of the shift cable; and a mounting bracket which is detachably connected to the mounting portion to cover the mounting portion when the mounting bracket is mounted to the mounting portion, wherein the mounting bracket includes: a first end portion having a penetration hole through which the shift cable passes when the mounting bracket is mounted to the mounting portion; and a second end portion having an insert groove into which a part of the socket is inserted and in which fixing pins wrap the shift cable to limit a lateral movement of the shift cable.


