Recording Head Grounding Structure for Inkjet Printers
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Solution Overview
Problem
Existing recording apparatus ground structures are complex and costly to assemble due to their intricate designs, which complicates the grounding of recording heads in devices like ink jet printers.
Innovation Solution
A compact and easy-to-assemble ground structure is achieved by mounting a recording head on a carriage with a ground member and sensor unit, where the ground member is positioned to contact the recording head, utilizing a flexible flat cable and ground wire connection, and an elastic leaf spring for multiple-point contact, reducing the need for dedicated fixtures and components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a dedicated ground mechanism with signal wires is installed around the recording head, then the recording head can be grounded for stabilization and noise reduction, but the ground structure becomes complex and difficult to assemble
Solution Approach 1:
The ground member is integrated into the carriage structure to serve dual purposes: it provides grounding for the recording head while simultaneously functioning as part of the carriage's structural framework. This eliminates the need for separate dedicated ground mechanisms and signal wires, simplifying the overall ground structure while maintaining reliable grounding stability.
2Reliability
If a dedicated ground mechanism with multiple components is used, then grounding can be achieved, but the number of components increases and assembly time increases
Solution Approach 1:
The ground member is merged with the carriage structure as an integrated component rather than being implemented as separate parts. The carriage body itself serves as the ground path, eliminating the need for additional ground wires, connectors, and mounting fixtures. This reduction in component count directly improves assembly efficiency while maintaining the grounding function.
3Ease of manufacture
If the ground member is positioned to contact the recording head on the opening of the carriage, then easy assembly is achieved, but contact reliability during reciprocation must be maintained
Solution Approach 1:
The ground member is designed with elastic properties allowing it to dynamically adapt to the recording head's position during carriage reciprocation. The elastic deformation capability enables the ground member to maintain continuous contact with the recording head despite movement and position variations, ensuring contact stability while preserving the simple assembly 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
This configuration simplifies the assembly process, reduces component count, and maintains reliable contact between the recording head and ground member, even during movement, preventing damage from ink ejection and ensuring stable operation.
Implementation Method 1
the ground member is an elastic body that elastically comes into contact with the recording head
Data Source
AI summary
A recording apparatus includes a recording head, a carriage having an opening on which the recording head is mounted in a state that the liquid ejection surface of the recording head faces the opening, the carriage being configured to reciprocate, a ground member that is mounted on the carriage so as to ground the recording head, and a sensor unit that is mounted on the carriage so as to perform sensing by using reciprocation of the carriage and has a ground mechanism which is connected to the ground member, wherein the ground member is disposed at a position in contact with the recording head mounted on the opening.