Lock System Slide Pin Radial Insertion Assembly
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Solution Overview
Problem
The existing lock system for glove boxes has difficulties in assembling the slide pin due to complex construction, leading to poor assembly properties and looseness issues, caused by the angular tube-like shape of the cam member which complicates the mold construction and results in gaps between components.
Innovation Solution
A lock system design featuring a post-like portion and double lateral projecting portions on the slide pin, which are inserted into corresponding recesses on the cam member, along with an elastic engagement piece to secure the slide pin axially, facilitating easier assembly and reducing looseness by ensuring proper engagement and alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the inserting portion is inserted into the angular tube-like end portion from the axial direction for connection, then the slide pin can be connected to the cam member, but the inserting operation becomes difficult and assembly properties deteriorate
Solution Approach 1:
The patent inverts the conventional insertion direction from axial to radial (perpendicular to axial). The slide pin is inserted into the cam member from the radial direction rather than pushing axially through the angular tube-like end portion, making the assembly operation significantly easier and reducing manufacturing difficulty.
2Reliability
If the projection is brought into engagement with the engagement hole to connect the slide pin, then the connection is secured, but gaps between components cause looseness
Solution Approach 1:
The patent extracts the problematic engagement hole from the angular tube-like end portion and replaces it with a radial recess that receives the slide pin's projection. This eliminates the gaps caused by misalignment between axial insertion and engagement hole positioning, securing the connection without looseness.
3Ease of manufacture
If the angular tube-like end portion is used for connection, then the slide pin can be attached to the cam member, but the complex shape leads to complex mold construction
Solution Approach 1:
The patent extracts the complex angular tube-like end portion geometry and replaces it with a simpler radial recess structure. This simplifies the mold construction while maintaining the connection function, as the radial recess requires less complex molding operations compared to the angular tube-like shape.
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 design enhances assembly properties by allowing the slide pin to be connected from a right angle to the axial direction, reducing looseness and simplifying the mold construction, resulting in improved stability and reduced wear, thus preventing dislocation and abnormal noise.
Implementation Method 1
an elastic engagement piece provided at an axially deep portion of the accommodation recess portion and adapted to be brought into engagement with an end portion of the slide pin in a direction in which the post-like portion projects while pressing the end portion in the axial direction
Data Source
AI summary
A lock system is provided which is made to facilitate connecting work of a slide pin with a cam member and reduce looseness in the connected state.A post-like portion 32 which projects in an axial direction and double side projecting portions 33, 33 which project from end portion of the post-like portion to both sides are provided at a connecting end portion 3c of a slide pin 3into a cam member 4 of the lock system, and provided at a connecting end portion 4a of the cam member 4 to the slide pin are an accommodation recess portion 40 made up of an axial recess portion 41 which receives the post-like portion and lateral recess portions 42 which are expanded from an intermediate position along the length of the axial recess portion so as to receive the double side projecting portions, and an elastic engagement piece 44 which is provided in an axial deeper portion in the accommodation recess portion so as to be brought into engagement with an end portion of the slide pin which lies in a direction in which the post-like portion projects while pressing the end portion in the axial direction. In addition, locking stepped portions adapted to be brought into engagement with the double side projecting portions may be provided on inner surfaces of lateral sides of both the lateral recess portions.