RV Door Lock Linkage for Synchronous Tongue and Safety Pin Retraction
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Solution Overview
Problem
The existing door locks on recreational vehicles require multiple steps for unlocking, involving separate operations for unlocking the safety pin and retracting the locking tongue, making the process cumbersome and inefficient.
Innovation Solution
A door lock design with a fixed outer handle and integrated lock core that synchronously moves the locking tongue and safety pin through a linkage mechanism involving rotary disks, eccentric rods, and reduction motors, allowing for simultaneous retraction without manual rotation of the handle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional linkage mechanism is used to control the ejection and retraction of the safety pin separately from the locking tongue, then the locking function is reliable, but the unlocking process becomes cumbersome and time-consuming
Solution Approach 1:
The patent combines the safety pin and locking tongue into a single integrated locking mechanism where both components are controlled by a single rotary disk. When the rotary disk rotates, it simultaneously controls both the safety pin ejection and the locking tongue retraction, merging two separate operations into one unified action. This eliminates the need for sequential operations and reduces unlocking time.
Solution Approach 2:
The rotary disk serves as a universal control mechanism that performs multiple functions: it controls both the safety pin ejection and the locking tongue retraction through its rotation. This multi-functional design allows a single input action (rotating the rotary disk) to achieve multiple locking-related operations, thereby simplifying the user interface and reducing operational steps.
2Ease of manufacture
If the safety pin and locking tongue are controlled separately through independent mechanisms, then each component can be optimized independently, but the overall device complexity increases
Solution Approach 1:
The patent merges the control mechanisms for the safety pin and locking tongue into a single rotary disk system. Instead of having separate independent mechanisms, both components are controlled through the rotation of one rotary disk, which reduces the overall number of parts and simplifies the linkage mechanism while still allowing each component to be optimized during the design phase.
3Productivity
If a single rotary disk controls both the locking tongue and safety pin, then the unlocking process is simplified and time is saved, but the manufacturing precision requirements increase
Solution Approach 1:
The rotary disk is segmented into distinct control zones: a first eccentric rod connected to the locking tongue and a second eccentric rod connected to the safety pin. These segmented zones allow independent optimization of each control path while maintaining overall synchronization. The segmentation enables precise control of each component through dedicated eccentric rod linkages, reducing the overall manufacturing precision burden compared to a fully integrated single-mechanism design.
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
Facilitates a streamlined unlocking process by synchronously retracting the locking tongue and safety pin, enhancing user convenience and enabling intelligent unlocking options.
Implementation Method 1
The locking tongue and a spring are arranged in the first sliding chamber. The spring abuts against the locking tongue. Under the action of the spring, the top end of the locking tongue is capable of remaining in a state of popping out outward.
Implementation Method 2
A first eccentric rod is disposed on the first rotary disk. The first eccentric rod is arranged in the elongated slot of the locking tongue, and is configured to push the locking tongue outwardly or pull the locking tongue inwardly through the rotation of the first rotary disk.
Implementation Method 3
A second eccentric rod is disposed on the toggle gear. The second eccentric rod is arranged in the elongated slot of the safety pin.
Implementation Method 4
A toggle gear is mounted in the mounting chamber. The toggle gear meshes with the gear face of the second rotary disk.
Data Source
AI summary
A door lock of recreational vehicle with a locking tongue and a safety pin that move synchronously is provided, which includes a lock body and an outer handle fixedly mounted on an outer end surface of the lock body. A first sliding chamber, a second sliding chamber and a mounting chamber are formed in the lock body. A locking tongue and a spring are arranged in the first sliding chamber. A safety pin is arranged in the second sliding chamber. A lock core of the lock body is arranged on the outer handle. The lock core sequentially extends through the outer handle and an outer shell of the lock body and is located in the mounting chamber. A first rotary disk is connected to an output shaft of the lock core. The first rotary disk is sleeved with a second rotary disk driven by the first rotary disk.