Card-Feeding Device with Rotary Push and Roller Transport
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Solution Overview
Problem
Existing card-feeding devices in badge and card printers often experience downtime due to insufficient friction force from rollers, leading to failure in separating stacked cards, which affects work efficiency.
Innovation Solution
A card-feeding device incorporating a rotary card-feeding mechanism with a push rod and a roller card-feeding mechanism, where the rotary mechanism separates and pushes cards to the outlet, and the roller mechanism further transports them using a friction-enhancing adhesive layer, increasing success rate and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If a roller card-feeding mechanism is used, then card-feeding speed is improved, but card-feeding success rate deteriorates due to insufficient friction force to separate stacked cards
Solution Approach 1:
The patent combines a rotary card-feeding mechanism and a roller card-feeding mechanism into a single integrated system. The rotary mechanism separates the bottom card from the stack using a push rod, while the roller mechanism transports the separated card to the outlet. This merging of two different feeding approaches resolves the contradiction by ensuring both successful card separation and continuous high-speed transport.
Solution Approach 2:
The card-feeding process is divided into two distinct segments: first, the rotary mechanism performs card separation using mechanical pushing action, and second, the roller mechanism performs card transport using friction-based rolling motion. This segmentation allows each mechanism to specialize in its optimal function, with the rotary mechanism ensuring separation success and the roller mechanism maintaining feeding speed.
2Reliability
If friction force of rollers is increased to separate cards, then card-feeding success rate is improved, but card-feeding speed deteriorates due to excessive force required
Solution Approach 1:
The patent divides the card-feeding function into two segments: the rotary mechanism handles the high-force separation task, while the roller mechanism handles the high-speed transport task. This segmentation allows the system to achieve both high success rate and high speed without requiring the rollers to generate excessive force.
Solution Approach 2:
The rotary mechanism performs preliminary card separation before the roller mechanism takes over for transport. By pre-separating the bottom card from the stack using the push rod, the system eliminates the need for high friction force during the subsequent roller transport phase, thereby maintaining high feeding speed.
3Device complexity
If cards are stacked on a flat base, then device simplicity is maintained, but card separation becomes difficult due to large electrostatic adsorption force
Solution Approach 1:
The rotary mechanism with push rod performs preliminary card separation by mechanically pushing the bottom card forward before it enters the roller feeding area. This preliminary action overcomes the electrostatic adsorption force between stacked cards without requiring complex base structures or modifications to the flat base design.
Solution Approach 2:
The push rod acts as an intermediary mechanical element that transfers force from the rotary mechanism to the bottom card, enabling effective separation despite the electrostatic adsorption forces present in the simple flat base configuration.
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 dual card-feeding mechanisms significantly enhance the card-feeding success rate and speed, reducing downtime and improving overall printer efficiency.
Implementation Method 1
the roller mechanism further transports them using a friction-enhancing adhesive layer
Data Source
AI summary
The present invention discloses a card-feeding device and a badge and card printer. The card-feeding device comprises: a base on which cards are stacked, a card outlet being provided at one end of the base; a rotary card-feeding mechanism which is located below the bottommost card and provided with a rotary swing arm and a push rod provided on the rotary swing arm, the push rod pushing the bottommost card towards the card outlet as the swing arm rotates; and a roller card-feeding mechanism which is installed between the rotary card-feeding mechanism and the card outlet and provided with a roller with an outer edge protruding from the top surface of the base, the bottommost card being transported to the card outlet when the roller rotates.