Roof Crossbar Hook Assembly for Vehicles Without Luggage Racks

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing roof crossbars are not adaptable to vehicles without a luggage rack, limiting their application scope, and existing solutions expose webbing inside the car compartment when used on sedans.

Innovation Solution

An extended hook structure for a roof crossbar with adjustable hooks that can be hitched to a vehicle's door frame, allowing secure attachment without a luggage rack, featuring a lock catch and hooks to secure the webbing.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the roof crossbar uses webbing that passes under the luggage rack for fixed connection, then the connection reliability is improved, but the adaptability to vehicles without luggage rack deteriorates

Engineering Contradiction:

Improveconnection reliabilityVSAvoidadaptability to vehicles without luggage rack

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The webbing connection system is segmented into two independent parts: (1) the original webbing that passes under the luggage rack for vehicles with luggage racks, and (2) the extended hook assembly with first webbing that can connect to door frames for vehicles without luggage racks. This segmentation allows the roof crossbar to adapt to different vehicle types while maintaining reliable connections in each scenario.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The extended hook assembly serves multiple functions: it provides an alternative connection method for vehicles without luggage racks, and can work in conjunction with the luggage rack system when needed. The adjustable hook assembly with detachable first hook and second hook allows the same structure to adapt to different mounting scenarios, achieving multi-functionality.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If the webbing is forcibly passed through the car compartment to connect end to end, then the adaptability to vehicles without luggage rack is improved, but the safety for passengers deteriorates due to webbing exposure

Engineering Contradiction:

Improveadaptability to vehicles without luggage rackVSAvoidwebbing exposure inside car compartment

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

Instead of passing the webbing horizontally through the car compartment interior, the extended hook assembly routes the webbing externally along the vehicle's door frame. The first webbing extends from the roof crossbar downward, then connects to the door frame via the adjustable hook assembly, completely avoiding the car compartment interior space and eliminating the safety hazard of exposed webbing.

Inventive Principle:

Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The door frame serves as an intermediary structure that replaces the luggage rack as the mounting point. The adjustable hook assembly acts as a mediator that connects the first webbing to the door frame, providing a safe external connection path that avoids the car compartment interior while maintaining secure attachment.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Strength

If the roof crossbar is designed for luggage rack mounting, then the connection strength is improved, but the universality across different vehicle models deteriorates

Engineering Contradiction:

Improveconnection strengthVSAvoiduniversality across vehicle models

Core Design Contradiction:

StrengthVSAdaptability or versatility

Solution Approach 1:

The adjustable hook assembly introduces dynamic adjustability to the connection system. The first hook can be adjusted along the door frame to accommodate different mounting positions and vehicle models. This dynamic adjustment capability maintains strong connections across various vehicle types while improving universality, as the same assembly can be configured for different door frame geometries.

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS20250333006A1Extended hook structure for roof crossbar

Publication Date: 2025.10.30 GUANGZHOU ISSYZONE TECH CO LTD

AI summary

The invention discloses an extended hook structure for a roof crossbar. The extended hook structure for a roof crossbar includes: a first webbing configured to be fixed to a roof crossbar. Both ends of the first webbing are provided with an adjustable hook assembly and a second hook configured to be hitched to a door frame of a target vehicle, respectively. The adjustable hook assembly includes a lock catch configured to be connected to one end of the first webbing, the other end of the lock catch is connected to a second webbing, and a tip end of the second webbing is provided with a first hook configured to be hitched to a door frame of the target vehicle. The present utility model has the following beneficial effects. This hook structure is adapted to a vehicle model without a luggage rack, which increases an application range of the roof crossbar.