Truck Bed Cover Locking Structure with Engaging Limiting Members
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Solution Overview
Problem
The existing locking structure for truck bed covers is inconvenient to install and disassemble, and it suffers from poor stability due to deformation after repeated use, leading to a weakened locking effect between the truck bed and side rail.
Innovation Solution
A locking structure featuring a side rail with a first limiting member and a fixing assembly comprising an inner and outer clamping block, where the limiting members engage to facilitate quick installation and disassembly without deformation, and the locking force is distributed to prevent damage, with adjustable surfaces for efficient fine-tuning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the outer clamping block uses a hook portion to engage the side rail, then the locking effect is improved, but the outer clamping block deforms after repeated installation and disassembly
Solution Approach 1:
The invention divides the connection function into two separate components: the limiting protrusion on the outer clamping block and the limiting groove on the side rail. This segmentation allows the outer clamping block to engage the side rail through a guided insertion motion rather than hooking, preventing deformation while maintaining the locking effect.
Solution Approach 2:
Instead of the outer clamping block hooking onto the side rail (as in the prior art), the invention inverts the engagement mechanism: the limiting groove is formed on the side rail and the limiting protrusion on the outer clamping block inserts into it. This reversal of the engagement direction eliminates the deforming hooking action while preserving the locking function.
2Reliability
If both clamping surfaces are in sawtooth shape, then the locking effect is improved, but the fastener must be loosened substantially for adjustment, making operation inconvenient
Solution Approach 1:
The invention applies different surface characteristics to different functional areas: the first clamping surface retains the sawtooth shape for strong locking engagement, while the second clamping surface uses a smooth arc shape that allows easy sliding and adjustment. This local differentiation enables both strong locking and convenient operation.
Solution Approach 2:
The smooth arc-shaped second clamping surface provides excessive sliding capability, allowing the inner clamping block to be easily adjusted along the side rail without requiring substantial loosening of the fastener. This partial modification of the surface geometry solves the adjustment inconvenience while maintaining the locking effect through the sawtooth first clamping surface.
Data Source
AI summary
A locking structure for a truck bed cover includes a side rail and a fixing assembly. The side rail is detachably installed on the truck bed. One side of the side rail is attached to the truck bed, and the other side of the side rail is provided with a first limiting member. The fixing assembly includes an inner clamping block, an outer clamping block and a fastener. The inner clamping block and the outer clamping block lock the truck bed and the side rail by the fastener. The surface attached to the side rail of the outer clamping block is provided with a second limiting member. The first limiting member and the second limiting member are engaged to limit the movement of the side rail. The new locking structure is convenient and quick to install, disassemble and adjust, has good stability, and can be used repeatedly.