Vehicle Seat Lock Single Switch Detection Mechanism
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Solution Overview
Problem
Existing vehicle seat lock devices require multiple detection switches, leading to a complex and uneconomical system.
Innovation Solution
A vehicle seat design incorporating a base member with a groove, a hook member, a lever, and a single detection switch, where the lever activates the switch when the striker is received in the groove, simplifying the structure and reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple detection switches are used to detect the locked state of the latch, then the reliability of detection is improved, but the device complexity and cost increase
Solution Approach 1:
The patent combines multiple detection functions into a single detection switch by integrating a detection cam that works with the latch mechanism. The detection cam has specific surfaces that engage with the latch at different positions, allowing one switch to detect multiple states (locked, unlocked, abnormal) that would otherwise require multiple separate switches.
Solution Approach 2:
The detection switch is designed to perform multiple detection functions simultaneously. By positioning the switch to receive signals from the detection cam at different engagement positions, a single switch can determine locked state, unlocked state, and abnormal conditions, making the detection system universal and eliminating the need for multiple specialized switches.
2Reliability
If multiple detection switches are provided in the vicinity of the latch, then the gray zone in the system is reduced, but the manufacturing cost increases
Solution Approach 1:
The patent merges the functionality of multiple detection switches into a single switch配合detection cam mechanism. The detection cam's geometric design ensures that the single switch can distinguish between locked and unlocked positions with clear transitions, eliminating gray zones without requiring multiple switches, thereby reducing manufacturing cost.
Solution Approach 2:
The detection cam acts as an intermediary mechanism between the latch and the detection switch. It translates the physical position of the latch into distinct engagement positions that the single switch can clearly detect, eliminating detection gray zones while maintaining cost-effectiveness through the use of one switch rather than multiple switches.
3Ease of manufacture
If a simple lock device structure is used, then the manufacturing cost is reduced, but the detection precision of the locked state may be compromised
Solution Approach 1:
The detection cam is pre-designed with specific engagement surfaces positioned at predetermined locations corresponding to locked and unlocked states of the latch. This preliminary geometric configuration ensures that as the latch moves between states, the detection cam automatically engages at the correct positions, providing precise detection without requiring complex sensing mechanisms.
Solution Approach 2:
The detection system is designed so that the detection switch receives equally reliable signals at both locked and unlocked positions through the detection cam's symmetric engagement design. This ensures that detection precision is maintained at both states without requiring asymmetric or complex detection arrangements, keeping the overall structure simple and cost-effective.
Data Source
AI summary
A seat for a vehicle includes a base member provided on the seat and including a groove in which a striker is received and from which the striker is extracted, a hook member rotatably connected to the base member, a lever rotatably connected to the hook member, and a switch that can be in contact with the lever; wherein the lever activates the switch when the striker is received in the groove and whose movement is prohibited by the hook member.