Electric Toothbrush Head Transmission Rod Stability
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Solution Overview
Problem
The existing electric toothbrush head transmission assembly lacks stable support and guidance, leading to irregular shaking and uneven power transmission, which affects the movement stability and cleaning effectiveness.
Innovation Solution
The electric toothbrush head incorporates a transmission assembly with a first, second, and third transmission rod, where the third transmission rod is hinged and provides a pulling force to the second transmission rod, ensuring stable stress and preventing irregular swinging, along with a shock absorbing pad and limiting posts for enhanced stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a movable connecting rod is used for power transmission, then the transmission structure is simple, but the transmission assembly lacks stable support and guidance causing irregular shaking
Solution Approach 1:
The transmission assembly is segmented into multiple functional components: a fixed rod providing stable support, a movable rod for power transmission, and a connecting rod with limiting posts for guided motion. This segmentation allows each component to perform its specific function optimally while working together to achieve stable and reliable power transmission.
Solution Approach 2:
The connecting rod acts as an intermediary component between the movable rod and the fixed rod. It includes limiting posts that guide the motion and ensure stable support, while transmitting the driving force from the movable rod to the cleaning head. This intermediary structure resolves the contradiction by providing both stability and guidance without overly complicating the transmission system.
2Device complexity
If the transmission assembly lacks stable support, then the structure is simple, but the electric toothbrush head shakes irregularly and transmission force is uneven
Solution Approach 1:
The support structure is segmented into a fixed rod that provides stable support and a connecting rod with limiting posts that guide the motion. This segmentation ensures that the power transmission is uniform and precise while keeping the overall structure relatively simple.
Solution Approach 2:
The invention replaces a purely mechanical linkage system with a hybrid system that includes a fixed rod providing stable support and a connecting rod with limiting posts for guided motion. This substitution improves power transmission uniformity by ensuring controlled and stable movement of the cleaning head.
3Reliability
If the third transmission rod is hinged and provides pulling force, then the movement stability is improved, but the device complexity increases
Solution Approach 1:
The connecting rod serves multiple functions: it connects the movable rod to the cleaning head, provides stable support through the fixed rod, guides the motion via limiting posts, and transmits the driving force. This multi-functionality improves movement stability without significantly increasing device complexity, as a single component performs multiple roles.
Solution Approach 2:
The connecting rod merges several functions into a single component: support, guidance, and force transmission. By combining these functions in one element rather than using separate components, the invention improves movement stability while minimizing the increase in device complexity.
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 stabilizes the movement of the cleaning head, ensuring uniform power transmission and improved cleaning effectiveness by preventing irregular swinging and enhancing the overall stability of the electric toothbrush head.
Implementation Method 1
one end of the third transmission rod is hinged in the mounting cavity... the third transmission rod provides a pulling force for the second transmission rod
Implementation Method 2
one end of the first transmission rod, one end of the second transmission rod and one end of the third transmission rod are rotatably connected through a rotating shaft
Implementation Method 3
along with a shock absorbing pad and limiting posts for enhanced stability
Data Source
AI summary
An electric toothbrush head, including: a housing, wherein the housing is provided with a mounting cavity and a mounting hole communicated with the mounting cavity; a transmission assembly, wherein the transmission assembly is arranged in the mounting cavity and comprises a first transmission rod, a second transmission rod and a third transmission rod, one end of the first transmission rod, one end of the second transmission rod and one end of the third transmission rod are rotatably connected through a rotating shaft, and the other end of the third transmission rod is hinged in the mounting cavity; and a cleaning head, wherein the cleaning head is rotatably mounted in the mounting cavity from the mounting hole, a bottom of the cleaning head is eccentrically provided with a first rotating groove, and another end of the second transmission rod is arranged in the first rotating groove.