Isofix Child Seat Indicator Device for Visual Locking Status
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Solution Overview
Problem
The correct connection and locking of the Isofix fastening part with the vehicle anchor, often located behind the child seat, are not visibly determinable by the operator, leading to potential misalignment and safety concerns.
Innovation Solution
A child seat with an indicator device featuring a cable pull mechanism that pivots a cam to release the Isofix locking device, allowing the actuating lever's position to change visibility through a housing opening, indicating the locking status effectively, and incorporating a spring-loaded Isofix locking arm for secure engagement and release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the Isofix locking device is positioned behind the child seat to secure the connection with the vehicle anchor, then the locking function is achieved, but the operator cannot visually determine whether the connection is correct
Solution Approach 1:
The patent introduces an indicator device as an intermediary element that translates the internal locking state into an externally visible signal. The indicator lever is mechanically coupled to the locking mechanism through a link, allowing the operator to observe the locking status through the opening in the housing without needing to see behind the child seat.
Solution Approach 2:
The patent moves the visual indication from the hidden dimension (behind the child seat where the locking occurs) to the visible dimension (front opening of the housing). By projecting the locking state information to a different spatial location that is accessible to the operator, the system resolves the contradiction between maintaining reliable locking and enabling visual verification.
2Difficulty of detecting and measuring
If an indicator device is added to display the locking status, then visual indication is improved, but the device complexity increases
Solution Approach 1:
The patent merges the indicator function with existing structural elements of the child seat. The indicator lever utilizes the housing opening and is integrated into the overall assembly, combining the indication function with the structural framework rather than adding completely separate components.
Solution Approach 2:
The indicator device is self-actuating through mechanical coupling. When the locking mechanism changes state, the link automatically moves the indicator lever to reflect the current status without requiring additional actuators, sensors, or power sources, thereby minimizing the increase in device complexity.
3Ease of operation
If the actuating lever is positioned to be operable from the front, then ease of operation is improved, but the mechanical linkage to the locking mechanism becomes more complex
Solution Approach 1:
The patent introduces a link as an intermediary mechanical element that transmits the actuating force from the front-accessible lever to the locking mechanism. This link serves as a simple mechanical mediator that bridges the gap between the operator interface and the locking device, enabling front operation without direct mechanical connection.
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
Ensures clear visual indication of the Isofix locking status, facilitating correct locking and unlocking operations, enhancing safety and ease of use by providing a clear visual cue for the operator.
Implementation Method 1
The Isofix locking arm is spring-loaded in the locking arm guide and can extend outwards after release.
Data Source
Figure 1
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AI summary
The invention relates to a child seat (1) for a motor vehicle with an indicator device (5; 51, 10) for indicating the proper interaction of an Isofix locking device (2) of the child seat (1) with an Isofix connection of the motor vehicle, wherein an actuating lever (4) for releasing an Isofix locking device (2) formed in the child seat is arranged on the child seat by means of a cable pull device (21), wherein the actuating lever (4) directly or indirectly pivots a cam (6) mounted in the child seat from a locking position to a release position, wherein the pull cable of the cable pull device (21) is attached to an arm (61) of the cam (6), which, when the cam (6) is pivoted, releases the Isofix locking device (2) by tensioning the pull cable and releases the Isofix connection to the motor vehicle, wherein the cam (6) in the locking position with an arm (61) rests on a rotatable about an axis arranged in the child seat, Lever (51) acts,whose free end (52), facing away from the cam, is visible from the outside through an opening (10) in the housing (3) of the child seat (1) in the locking position, but is swung away from the opening in the release position.