Electric Toothbrush Handle Transmission Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional electric toothbrush designs have limited motor shaft swing ranges, resulting in inadequate cleaning of deep spaces between teeth and hard-to-reach areas, and struggle to achieve the ideal cleaning frequency and force.
Innovation Solution
The electric toothbrush handle incorporates a transmission mechanism with a rotating member, eccentric shaft, and transmission arms to amplify the driving force, allowing the brush head to reciprocate in a larger range and penetrate deeper between teeth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the motor shaft swing range is increased to improve cleaning ability, then the cleaning effect is improved, but the device complexity increases
Solution Approach 1:
The patent employs a dynamic transmission mechanism where the motor shaft connects to a transmission assembly that converts limited motor shaft rotation into amplified brush head reciprocation. The transmission mechanism includes a drive rod, transmission arms, and a rotating member with eccentric shaft that dynamically transforms motion to achieve larger swing range without proportionally increasing motor complexity.
Solution Approach 2:
The transmission mechanism acts as an intermediary between the motor shaft and the brush head. It includes a drive rod extending from the motor shaft through a mounting box, with transmission arms and a rotating member that mediate the force transmission, amplifying the motor's limited output into sufficient brush head swing range and force.
2Reliability
If the swing frequency and force are increased to improve cleaning effect, then the cleaning effect is improved, but the risk of stimulating or damaging teeth and gums increases
Solution Approach 1:
The transmission mechanism converts continuous motor rotation into periodic reciprocating motion of the brush head. The rotating member with eccentric shaft creates a periodic up-and-down motion that delivers controlled cleaning forces at optimal frequencies, preventing both insufficient cleaning and excessive stimulation.
Solution Approach 2:
The patent changes the motion parameters through the transmission mechanism. The motor operates at safe, limited speeds while the transmission assembly transforms this into brush head reciprocation at optimal cleaning frequencies with amplified force, adjusting the parameters to achieve effective cleaning without harmful effects.
3Device complexity
If the motor shaft swing range is limited, then the device complexity is reduced, but the cleaning ability deteriorates
Solution Approach 1:
The system uses dynamic motion transformation where the motor shaft's limited rotation is converted through a transmission mechanism into amplified brush head reciprocation. The drive rod, transmission arms, and eccentric rotating member work together to multiply the effective swing range without requiring the motor itself to have high complexity.
Solution Approach 2:
The transmission mechanism serves as an intermediary that bridges the gap between the simple motor shaft output and the complex cleaning requirements. It includes a mounting box with second mounting hole, drive rod, transmission arms, and rotating member that collectively amplify the motor's limited motion into sufficient cleaning action.
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 design enhances the cleaning effect by allowing the brush head to reach deeper areas and maintain optimal cleaning frequency and force, improving dental hygiene.
Implementation Method 1
a rotating member hinged to the other end of the second transmission arm, the rotating member comprises a main body and an eccentric shaft eccentrically arranged on the main body, and the rotating member is hinged to the second transmission arm through the eccentric shaft
Data Source
AI summary
The present invention discloses an electric toothbrush handle, which comprises: a first housing, wherein the first housing is provided with a first mounting cavity and a first mounting hole communicated with the first mounting cavity; a drive rod, wherein one end of the drive rod extends into the first mounting cavity from the first mounting hole; a transmission mechanism, wherein the transmission mechanism is arranged in the first mounting cavity, and the transmission mechanism comprises a mounting box and a transmission assembly arranged in the mounting box; and a drive motor, wherein the drive motor is arranged in the first mounting cavity, the mounting box is further provided with a third mounting hole, and the drive motor is in driving connection with the rotating member of the transmission mechanism through the third mounting hole. The present invention effectively improves the cleaning effect of the electric toothbrush.