Snap-Fit Expansion Card Locking Mechanism With Fewer Parts
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Solution Overview
Problem
Conventional locking mechanisms for removably locking expansion cards in electronic devices are bulky, complex, costly, and require numerous assembly steps, leading to inefficiency and time-consuming operations.
Innovation Solution
A simplified locking mechanism comprising a positioning post, frame, and a locking member with a snap fastening portion and flexible portion, allowing for easy assembly and operation through a snap-fastening and unlocking mechanism that reduces component count and simplifies the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional locking mechanism is used to securely lock the expansion card module, then the locking reliability is improved, but the device complexity and manufacturing cost increase due to a large number of components
Solution Approach 1:
The locking member integrates multiple functions into a single component: the snap fastening portion provides locking engagement, the flexible portion provides elastic deformation for snap-fit action, and the unlocking operated portion provides release functionality. This merging of functions reduces the total number of components while maintaining reliable locking.
Solution Approach 2:
The locking member serves multiple purposes: it locks the expansion card module to the main board, provides positioning through the snap fastening portion, and enables unlocking through the operated portion. This multi-functionality eliminates the need for separate locking, positioning, and releasing mechanisms.
2Strength
If a conventional locking mechanism with many components is used, then the locking strength is improved, but the manufacturing cost increases
Solution Approach 1:
Combining multiple locking features into a single locking member reduces the number of parts that need to be manufactured, assembled, and inventoried. The snap fastening portion provides strong mechanical engagement while the flexible portion enables easy assembly through elastic deformation, reducing manufacturing complexity and cost.
Solution Approach 2:
The flexible portion is designed with specific elastic properties that allow it to deform under assembly forces and then spring back to create a strong locking engagement. By changing the material parameters and geometric parameters of the flexible portion, strong locking can be achieved through a single component rather than multiple rigid parts.
3Reliability
If a conventional locking mechanism is used, then the locking security is improved, but the assembly time and operational efficiency decrease due to numerous assembly steps
Solution Approach 1:
The flexible portion is pre-formed with elastic properties that automatically engage the snap fastening portion with the positioning post during a single insertion motion. This preliminary preparation of the elastic structure eliminates the need for multiple assembly steps such as threading, tightening, or separate locking actions.
Solution Approach 2:
The flexible portion automatically performs the locking action through its own elastic deformation when the snap fastening portion contacts the positioning post. The mechanism is self-actuating during assembly and self-releasing during unlocking, eliminating the need for complex multi-step assembly procedures or specialized tools.
4Ease of operation
If a simplified locking mechanism with fewer components is used, then the ease of assembly is improved, but the device may occupy more space
Solution Approach 1:
The snap fastening portion is designed to nest around the positioning post, with the flexible portion wrapping around the post to create a secure fit. This nesting arrangement allows the locking mechanism to occupy minimal space while maintaining simple assembly through snap-fit engagement.
Solution Approach 2:
The locking mechanism utilizes the radial dimension by having the snap fastening portion engage circumferentially around the positioning post, rather than requiring axial space for threaded fasteners or lever-based locking. This dimensional change enables compact locking with minimal space occupation.
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 mechanism facilitates efficient and compact locking and unlocking operations with reduced manufacturing costs and enhanced operational efficiency, ensuring secure retention of electrical components while minimizing interference and stress concentration.
Implementation Method 1
a lateral thrust force exerted by the head deformably spreads the snap fastening portion, which results in deformation of the flexible portion to store a biasing restoring force
Data Source
AI summary
A locking mechanism for removably locking a first electrical component to a second electrical component includes a positioning post secured to the second electrical component, a frame for mounting the first electrical component, and a locking member movably connected with the frame. The positioning post has a head and a neck. The locking member has a snap fastening portion, a flexible portion and an unlocking operated portion. When the snap fastening portion contacts the head and is moved toward the neck, a lateral thrust force exerted by the head spreads the snap fastening portion and cause deformation of the flexible portion to store a biasing restoring force. When the snap fastening portion is aligned with the neck, the snap fastening portion is moved by the biasing restoring force to be snap fastened to the neck. The unlocking operated portion is operated to disengage the snap fastening portion from the neck.