Lock Device Guide Wall and Elastic Nail Assembly
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Solution Overview
Problem
The existing lock device for opening and closing bodies is cumbersome to assemble due to the need to precisely position the rotor link portion and restriction portions, and the elastic-nail shaped restriction portions make it difficult to insert the rod between them.
Innovation Solution
A lock device with a base member and rotary member that includes a guide wall and erection walls with a gap to receive the rod, and a coming-off-preventive structure using a bendable elastic nail and engagement target portion to easily attach and guide the rods, preventing them from coming off.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rotor link portion and restriction portions are positioned at different locations, then the lock member can be securely connected to the rotor member, but the assembling work becomes cumbersome due to the need to precisely position multiple components
Solution Approach 1:
The patent combines the rotor link portion and restriction portions into a single integrated rotor member structure. This merging eliminates the need for separate positioning of multiple components, simplifying the assembly process while maintaining the secure connection between the lock member and rotor member through the unified structure.
Solution Approach 2:
The rotor member is designed to perform multiple functions simultaneously: it provides both the rotor link portion for connecting the lock member and the restriction portions for guiding and securing the rod. This multi-functionality reduces the number of separate components needed, thereby easing assembly while ensuring reliable connection.
2Reliability
If the restriction portions are shaped like elastic nails to engage with end portions of the rod member, then the lock member is prevented from coming off, but it becomes difficult to insert the rod member between the pair of restriction portions during assembly
Solution Approach 1:
The restriction portions are designed as elastic nails that can dynamically change their state. During assembly, they are flexible enough to allow the rod member to be inserted between them. Once the rod is in place, the elastic nails engage with the end portions of the rod member to prevent the lock member from coming off, thus providing both insertion ease and anti-coming-off capability.
Solution Approach 2:
The elastic properties of the restriction portions allow their physical parameters to change during the assembly process. They deform to accommodate the insertion of the rod member and then return to their original shape to engage with the rod's end portions, providing secure retention. This parameter change enables both easy insertion and reliable prevention of the lock member coming off.
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
The solution allows for easy attachment and sliding of the rods by inserting them into the gap between the guide wall and erection walls, simplifying the assembly process and preventing the rods from coming off, thus enhancing the ease of use and reliability of the lock device.
Implementation Method 1
a pair of elastic-nail-shaped restriction portions are erected on the back side of the base member
Data Source
AI summary
A lock device includes lock portions, a pair of rods, a base member, a rotary member, and a manipulation member. The rotary member has a rod link portion coupled with the rods and transmit rotational power of the rotary member to the rods and a guide wall located inside the rod link portion in the rotary member and guides the rods. The guide wall includes arc walls or a cylindrical wall whose axis coincides with the rotation center of the rotary member. When viewed from a direction perpendicular to a bottom surface of the base member, the erection wall and the guide wall are opposed to each other with a gap. Coming-off-preventive structures for preventing the rod from coming off when the rod is inserted in the gap and coupled with the rod link portion is provided between the rod and the erection wall.