Display Card Holder Vibration Damping Latch Mechanism
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Solution Overview
Problem
Devices for holding disposable cards are susceptible to vibration and rattling noise when fully assembled, particularly in applications like golf carts where movement occurs.
Innovation Solution
A display card holder design featuring a sleeve with cutouts, a sleeve holder with a pivotable button member and spring mechanism that pinches the sleeve end section against the holder's interior surface, preventing rattling by providing a secure latch without additional friction or obstruction during insertion and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a secure latch mechanism is added to prevent rattling, then vibration resistance improves, but device complexity increases
Solution Approach 1:
The button member is divided into a head portion and a wing portion connected by a hinge, allowing independent movement of each segment. This segmentation enables the button to pivot and latch securely without requiring a complex overall mechanism
Solution Approach 2:
The button member transitions from a static component to a dynamic one that can pivot between latched and unlatched positions. The spring provides dynamic biasing force, enabling the mechanism to respond to insertion forces and maintain secure retention under vibration
2Strength
If friction is increased to secure the sleeve, then retention strength improves, but ease of operation deteriorates
Solution Approach 1:
The button member acts as an intermediary that mediates between the sleeve and sleeve holder. Instead of increasing friction directly between sleeve and holder, the button provides a mechanical latch that secures the assembly without impeding insertion or removal operations
3Reliability
If obstruction is added to prevent rattling, then vibration resistance improves, but ease of operation deteriorates
Solution Approach 1:
The button member is designed to be dynamically movable between latched and unlatched states. The hinge connection allows the button to pivot freely when force is applied to the actuator, enabling easy removal without permanent obstructions
Solution Approach 2:
The spring-loaded button member automatically returns to its latched position after being actuated open. This self-service mechanism ensures the sleeve remains secured during normal use while allowing intentional opening when needed
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 effectively minimizes vibration and rattling noise while allowing easy attachment and detachment of the sleeve, ensuring secure retention of the card even under loads and movement, enhancing usability on movable surfaces like golf carts.
Implementation Method 1
a spring arranged to bias the button member in a first direction with respect to the body of the sleeve holder
Implementation Method 2
an elongate first edge forming a pivot about which the button member is pivotable with respect to the body of the sleeve holder
Data Source
AI summary
A display card holder including a sleeve for a printed card and a sleeve holder defining a cavity open at one end to receive a sleeve end section having a pair of cutouts. The cavity defines a sleeve-receiving channel having a width providing clearance to the sleeve thickness. A button member movably supported by a sleeve holder body defines an actuator portion exposed to an outside of the sleeve holder. The button member includes wings extending from opposite sides of the actuator button. A spring biases the button member in a first direction with respect to the body of the sleeve holder. Each wing is formed to include: a pin adapted to extend through a corresponding one of the cutouts, and an elongate first edge forming a pivot about which the button member is pivotable with respect to the sleeve holder body.