Pickup Tonneau Cover Locking Mechanism and Mounting Clamp
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Solution Overview
Problem
Existing cargo bay covers for pickup trucks have complex lock mechanisms requiring two hands to operate, reduced usable height due to underside rods, panel ballooning at high speeds, and difficulties in secure mounting to the truck bed.
Innovation Solution
A cargo bay cover with a simple low-profile lock mechanism, a rigid latch clamp, and a flexible latch member to prevent panel ballooning, along with a secure mounting clamp for easy installation on the truck's L-shaped members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a combined lock and release mechanism with multiple moving parts is used, then security is improved, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The patent divides the locking system into separate components: a lock mechanism with a lock rod and cam, and a release mechanism with a release cam and throw rod. This segmentation allows each component to perform its specific function independently, reducing overall complexity while maintaining security through the coordinated interaction of these simplified parts.
Solution Approach 2:
The patent extracts the essential locking function from a complex multi-component system and implements it through a simplified cam-and-rod mechanism. The lock rod with cam profile provides the locking action, while the release mechanism uses a throw rod to actuate the cam, removing unnecessary moving parts while preserving security functionality.
2Reliability
If rods are connected between the lock and latches on the underside of the cover, then security is improved, but the usable height of the cargo bay is reduced
Solution Approach 1:
The patent relocates the locking mechanism from the traditional underside position to the vertical edge of the tonneau cover. The lock rod and cam mechanism are positioned at the rear vertical edge, allowing the latch to engage with a keeper on the truck bed in a vertical dimension rather than requiring horizontal rods underneath the cover. This dimensional change eliminates the need for underside rods while maintaining security.
3Ease of operation
If the second and third panels are designed to fold together, then ease of operation is improved, but panel stability deteriorates at highway speeds
Solution Approach 1:
The patent applies different structural qualities to different panels: the first and fourth panels are designed to fold independently with individual latches for ease of access, while the second and third panels are configured to fold together as a unit with a shared latch mechanism. This local differentiation provides both operational convenience for frequent access and improved aerodynamic stability for the rear panels at highway speeds.
4Device complexity
If a simple lock mechanism is used, then device complexity is reduced, but reliability may deteriorate
Solution Approach 1:
The patent combines multiple simple mechanical elements (lock rod with cam profile, release cam, throw rod, latches, and keepers) into a composite locking system. While each individual component is simple in design, their coordinated interaction creates a reliable security mechanism that is both simple to manufacture and effective in practice.
Data Source
AI summary
A cargo bay cover for a pickup truck includes at least first and second panels hingedly connected to each other. The first panel includes a release mechanism including a lever arm that is movable between a released position and an unreleased position, and a lock that is movable to a locked position preventing movement of the lever arm. The cover includes a resiliently deformable panel latch that is released when the first panel is opened and that is capable of flexing around a keeper if the cover is opened incorrectly. The cover includes a unique mounting clamp for attachment to the pickup truck. A second half of the mounting clamp rides up a shoulder on a first half of the mounting clamp as the halves are drawn together, enabling the to pinch in two directions—one parallel to the drawing force and another perpendicular to the drawing force.