In-Vehicle Bracket Locking Mechanism for Rattle-Free Window Mount
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Solution Overview
Problem
Existing in-vehicle camera holding devices face challenges in securing high dimensional accuracy and preventing rattling, especially when using plastic molded brackets, which complicates the attachment process and requires increased insertion force.
Innovation Solution
A bracket system with a base fixed to the window glass, side portions that protrude downward, and a locking member that moves between two positions to securely hold the in-vehicle device without applying an upward pressing force to the window glass, allowing temporary and permanent installation without rattling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If both brackets are formed as plastic molded products to simplify manufacturing, then ease of manufacture is improved, but dimensional accuracy deteriorates making it difficult to secure high dimensional accuracy
Solution Approach 1:
The bracket is divided into multiple components: a body portion (base) and a locking member that can be assembled separately. This segmentation allows each part to be manufactured independently with standard plastic molding processes, maintaining ease of manufacture while enabling precise fitting through the assembly interface between parts.
Solution Approach 2:
The support portion is pre-formed as an integrated feature of the body portion before the locking member is attached. This preliminary formation of the support structure allows for precise dimensional control in the main body while the locking member is added subsequently, resolving the dimensional accuracy issue without compromising manufacturing ease.
2Reliability
If the first bracket is inserted to the second bracket while suppressing rattling, then reliability is improved, but insertion force increases making attachment less smooth
Solution Approach 1:
The locking member is designed to transition from a loose initial state during insertion to a locked state after insertion. During the insertion phase, the locking member can move freely with minimal resistance. After insertion, the locking member is positioned to engage with the support portion, creating a rigid connection that suppresses rattling. This dynamic state change allows low insertion force while maintaining high reliability.
Solution Approach 2:
The support portion is pre-formed in the body portion to receive the locking member. This preliminary preparation of the receiving structure allows the locking member to be inserted smoothly without excessive force, while the pre-formed geometry ensures proper alignment and eventual secure engagement for reliable operation.
3Reliability
If a locking mechanism is added to prevent rattling, then reliability is improved, but device complexity increases
Solution Approach 1:
The locking member is merged with the body portion through an assembly process where the locking member is attached to the body to form an integrated unit. This combining approach provides reliable locking functionality while avoiding the need for completely separate, complex locking mechanisms. The support portion is also integrated into the body portion, further simplifying the overall structure while maintaining reliability.
Data Source
AI summary
A bracket for holding an in-vehicle device inside a window glass includes a base configured to be fixed to an inside surface of the window glass; right and left side portions protruding downward from the base; a locking member assembled so as to be movable between a first position and a second position; and at least one support portion configured to receive a supported portion provided in the in-vehicle device and inserted between the right and left side portions from a lateral direction while the locking member is located at the first position. When the locking member is moved to the second position while the supported portion is received by the support portion, the locking member is pressed against the supported portion so that the in-vehicle device is held in any of the front to rear direction and the up to down direction without rattling.