Locking Device Elastic Side Walls Prevent Rattling
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Solution Overview
Problem
The existing side locking apparatus requires either high inserting force during assembly or is prone to rattling after assembly, as the rods are attached to the rotor using spherical projections that fit into recess portions, making it difficult to balance the force required for assembly and post-assembly stability.
Innovation Solution
The locking apparatus includes a rotary member with a projection that fits into a recess portion on the sliding rod, featuring restricting walls and elastic side walls with nail portions to securely engage the projection, allowing for easy assembly and minimizing rattling by using a torsional coil spring to rotate the rotary member and disengage the sliding rod.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If spherical projections are used to attach rods to the rotor, then assembly is simplified, but rattling occurs after assembly
Solution Approach 1:
The recess portion is designed with elastic side walls that can deflect during assembly. When the spherical projection is inserted, the elastic side walls compress and then rebound to securely hold the projection, eliminating rattling while maintaining easy assembly through the elastic deformation mechanism
Solution Approach 2:
The side walls of the recess portion are designed as elastic flexible structures rather than rigid walls. This flexibility allows the recess to adapt to the spherical projection during assembly and then maintain a secure fit, preventing rattling without requiring complex assembly procedures
2Ease of operation
If inserting force is reduced for easier assembly, then assembly becomes easier, but rattling is more easily caused
Solution Approach 1:
The recess portion transitions from a rigid structure to a dynamic elastic structure that can deform during assembly. The elastic side walls compress under the spherical projection during insertion and then rebound to create a secure fit, allowing easy assembly with low inserting force while preventing post-assembly rattling through the dynamic elastic response
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
This design facilitates easy assembly and suppresses looseness post-assembly by securely engaging the rotary member with the sliding rod, preventing rattling due to the elastic deflection of the side and bottom walls, ensuring accurate sliding and maintaining the locked state without dimension errors.
Implementation Method 1
the elastic side walls which have nail portions, respectively, the nail portions being brought into engagement with a proximal end side of the head portion of the projection
Data Source
AI summary
A locking device includes: a rotating member having a support shaft and a protrusion provided at a position deviated with respect to the support shaft; a sliding rod that connects to the rotating member due to the protrusion being fit into a recess provided at a base end side; and an unlocking member that unlocks by causing the rotating member to rotate. The recess includes: a pair of restricting walls facing each other in a length direction of the sliding rod; a pair of elastic side walls facing each other in a width direction of the sliding rod having hook portions that engage with the base end side of the head of the protrusion; and an elastic bottom wall that receives the leading end side of the protrusion.