Vehicle Seat Rail Locking Structure to Prevent Sliding Noise
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Solution Overview
Problem
Existing vehicle seat sliding devices generate noise due to interference of the locking unit with the fixed rail when the seat is returned from the unlocking section to the locking section.
Innovation Solution
A vehicle seat sliding device with a locking unit that includes a plurality of locks, where at least one lock in the unlocking section is positioned to create a gap with the fixed lock in the locking section, and the locking unit is moved by an elastic force to engage or disengage with the fixed lock, preventing interference noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the locking unit is provided with a single lock that engages with the fixed lock, then the structure is simple, but noise is generated due to interference when the seat is returned from the unlocking section to the locking section
Solution Approach 1:
The locking unit is divided into multiple locks (first lock and second lock) instead of using a single lock. This segmentation allows the locks to be positioned at different locations along the moving rail, enabling one lock to engage with the fixed lock while another lock is positioned in the unlocking section, thereby preventing interference noise without significantly increasing structural complexity
Solution Approach 2:
The problem is solved by introducing a spatial dimension - positioning the multiple locks at different longitudinal positions along the moving rail. This dimensional arrangement allows the locking mechanism to function properly in the locking section while preventing interference in the unlocking section, resolving the noise issue without adding complex mechanical components
2Reliability
If the lock is formed longer to engage with the fixed lock, then the locking reliability is improved, but interference with the fixed rail in the unlocking section occurs
Solution Approach 1:
The locking function is segmented into multiple locks with different functions: the first lock is designed to engage with the fixed lock for reliable locking, while the second lock is positioned to prevent interference in the unlocking section. This segmentation allows each lock to be optimized for its specific function without compromising the other
Solution Approach 2:
Different locks are given different local characteristics - the first lock has a length and position optimized for engaging with the fixed lock in the locking section, while the second lock is positioned specifically to interact with the fixed rail in the unlocking section. This local differentiation resolves the contradiction between locking reliability and interference prevention
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents noise generation by ensuring the locks in the unlocking section are spaced apart from the fixed lock, allowing smooth movement without interference.
Implementation Method 1
the locking unit is moved upward by an elastic force of an elastic member and is locked by that the lock is engaged with the fixed lock in the locking section
Data Source
AI summary
Disclosed is a vehicle seat sliding device, which prevents noise from being generated when a seat is moved. The vehicle seat sliding device includes: a fixed rail which includes a locking section in which a fixed lock is formed and an unlocking section in which the fixed lock is not formed; a moving rail which slides along the fixed rail; a locking unit which is provided in the moving rail, moves up and down, and has a plurality of locks that is selectively engaged with the fixed lock. When at least one lock of the plurality of locks is located in the unlocking section, remaining locks located in the locking section are disposed apart from the fixed lock so as to have a gap with the fixed lock. With this configuration, when the moving rail is returned from the unlocking section to the locking section, the lock of the locking unit is disposed apart from the fixed lock provided in the fixed rail in such a way as to have a gap, so that noise can be prevented from being generated.