Keyboard Balancing Structure Arc Trajectory Impact Noise
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Solution Overview
Problem
The existing keyboard structures produce abnormal sounds due to the impact of the balancing rod on the bottom plate during the sliding process, which is not effectively addressed by current solutions such as lubricating oil or non-metal coatings.
Innovation Solution
A balancing structure for long keys, where the sliding rods move along an arc trajectory on the clamping port edges of the clamping hooks, eliminating direct impact and thus preventing abnormal sounds, by seamlessly matching the sliding rods with the clamping port edges in specific configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the balancing rod and bottom plate are both made of metal for durability, then strength is improved, but abnormal sounds are generated due to impact during sliding
Solution Approach 1:
The clamping port edge is designed with an arc-shaped curved surface instead of a straight or angular shape. This curved surface guides the sliding rod to move along an arc trajectory, creating a buffer effect that prevents direct impact between the sliding rod and clamping hook, thereby eliminating abnormal sounds while maintaining metal materials for both balancing rod and bottom plate
2Ease of operation
If lubricating oil is coated on the balancing rod to reduce friction, then ease of operation is improved, but the solution is unstable and actual effect is poor
Solution Approach 1:
The arc-shaped clamping port edge provides a geometric buffer that naturally reduces impact and friction during sliding, eliminating the need for lubricating oil coatings while providing stable, reliable operation throughout the product lifecycle
Solution Approach 2:
The invention replaces the chemical/lubrication-based friction reduction method with a geometric/mechanical solution through the arc-shaped guide surface, which passively reduces impact and friction through its shape rather than requiring external lubricants
3Object-generated harmful factors
If non-metal material is put on the bottom plate to reduce impact sound, then abnormal sounds are reduced, but the material composition of the keyboard is altered
Solution Approach 1:
The arc-shaped clamping port edge on the metal bottom plate creates a buffer effect that prevents direct impact, reducing abnormal sounds while maintaining the all-metal construction and material consistency of the keyboard
Data Source
AI summary
A balancing structure for a long key of a keyboard includes a balancing rod and a pair of clamping hooks arranged on a bottom plate of the keyboard. The balancing rod includes a cross rod matched with a keycap of the key and two sliding rods extending from two end parts of the cross rod and matched with the pair of clamping hooks respectively. During the keycap pressing or spring-back process, each of the two sliding rods slides on a clamping port edge on at least one side of the corresponding clamping hook along with the rotation of the cross rod, and the moving trajectory of the contact point of each sliding rod and the corresponding port edge is an arc in the sliding process.