Liquid Cartridge Circuit Board Resilient Support
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Solution Overview
Problem
Conventional inkjet recording systems risk damaging the circuit board within the ink cartridge during insertion due to direct contact with the attachment portion, despite the use of springs to absorb impacts.
Innovation Solution
The ink cartridge is designed to be inserted at an angle crossing the gravitational direction, with the circuit board positioned rearward of the sealing member, and supported by a resilient leaf spring that allows vertical movement, reducing the likelihood of direct impact and absorbing any transmitted forces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the circuit board is disposed on the downstream end in the insertion direction with a spring to absorb impacts, then the circuit board can change position through spring deformation, but the circuit board becomes interposed between the contacts and support part, allowing strong impact to still be transmitted to the circuit board
Solution Approach 1:
The sealing member is positioned upstream of the circuit board in the insertion direction, so it contacts the attachment portion first during insertion. This preliminary contact absorbs and reduces the impact force before it reaches the circuit board, preventing direct transmission of strong impacts to the vulnerable electronic components
Solution Approach 2:
The spring is configured to provide cushioning protection to the circuit board before impact occurs. The spring's elastic deformation capacity is designed to absorb impact energy in advance, creating a protective buffer zone between the rigid support part and the fragile circuit board, thereby reducing harmful impact transmission
2Ease of operation
If the circuit board is positioned to face upward for electrical connection, then electrical connections can be formed between the cartridge contact and attachment portion contacts, but the circuit board remains vulnerable to impact during insertion
Solution Approach 1:
The sealing member is positioned to contact the attachment portion before the circuit board during insertion. This preliminary action protects the upward-facing circuit board by absorbing impact forces before they can damage the electrical components, allowing both easy electrical connection and reliable protection
Solution Approach 2:
The spring acts as an intermediary element between the rigid support part and the vulnerable circuit board. It mediates the transmission of forces during insertion, providing a compliant interface that protects the electrical components while maintaining the necessary mechanical support and electrical connection geometry
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 configuration minimizes the risk of circuit board damage during insertion by ensuring the sealing member and its components contact the attachment portion first, and the leaf spring absorbs any impacts, ensuring smooth insertion and secure electrical connections.
Implementation Method 1
The circuit board supported by the support member is resiliently movable upward and downward relative to the housing in the upright posture
Data Source
AI summary
A liquid cartridge is configured to be inserted into an attachment portion of a printing device in an insertion direction and attached thereto in an upright posture. The liquid cartridge includes: a housing; a sealing member; a circuit board; and a support member. The housing includes: a liquid chamber; and a liquid passage. The sealing member is disposed in the liquid passage. The circuit board is positioned rearward in the insertion direction relative to the sealing member in the upright posture. The circuit board includes: a contact; and a memory. The contact of the cartridge is electrically connectable to a contact of the device. The memory is electrically connected to the contact of the cartridge. The support member supports the circuit board. The circuit board supported by the support member is resiliently movable upward and downward relative to the housing in the upright posture.