Snap-Fit Drive Module Assembly for Aerosol Dispenser Motors
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Solution Overview
Problem
Existing drive module assemblies for aerosol dispensers are labor-intensive to manufacture and assemble, as components are typically inserted piece-by-piece into the dispenser housing and require screws or bolts for attachment, limiting design flexibility and efficiency.
Innovation Solution
A drive module assembly featuring a gear plate with a seat for the motor, a motor cap with snap-in pawls, and axles for the gear train, allowing for snap-fitting assembly without screws, enabling the assembly to be manufactured as a single unit for easier insertion into various dispenser designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If components are assembled piece-by-piece using screws or bolts, then the attachment is secure and reliable, but the manufacturing process becomes labor-intensive and time-consuming
Solution Approach 1:
The patent replaces the traditional screw or bolt mechanical fastening system with a snap-fit mechanism. The motor cap includes protrusions that engage with corresponding recesses in the gear plate, creating a secure connection through elastic deformation and geometric interlocking rather than threaded fasteners. This substitution eliminates the need for tools and multiple fastening operations while maintaining reliable attachment.
Solution Approach 2:
The patent combines multiple components (motor, gear plate, motor cap) into a pre-assembled drive module unit. The motor is first attached to the gear plate using snap-fit connections, forming an integrated assembly that is then installed as a single unit into the dispenser housing. This merging reduces the number of separate assembly operations and improves manufacturing efficiency.
2Ease of operation
If drive module components are separately inserted into the dispenser housing, then each component can be individually positioned, but the assembly process becomes complex and labor-intensive
Solution Approach 1:
The patent merges the motor, gear plate, and motor cap into a pre-assembled drive module with integrated alignment features. The gear plate includes protrusions that engage with recesses in the housing, and the motor is pre-attached to the gear plate via snap-fit connections. This integration allows the entire drive module to be installed as a single unit, simplifying the assembly process while maintaining precise positioning through built-in geometric constraints.
3Strength
If traditional fastening methods are used, then the connection is strong and durable, but the design flexibility for different dispenser configurations is limited
Solution Approach 1:
The patent segments the fastening system into modular snap-fit interfaces between the motor cap and gear plate, and between the gear plate and housing. These segmented connection points feature geometric interlocking elements (protrusions and recesses) that provide secure attachment while allowing for easy disassembly and reconfiguration. This segmentation enables the drive module to be adapted to different dispenser configurations without requiring complete redesign.
4Reliability
If screws or bolts are used to attach the motor to the gear plate, then the attachment is secure, but the manufacturing and assembly process requires additional tools and steps
Solution Approach 1:
The patent substitutes traditional screw or bolt fastening with a snap-fit mechanism where the motor cap includes protrusions that engage with recesses in the gear plate. This mechanical substitution eliminates the need for threaded fasteners, tools, and multiple fastening steps, while providing secure motor attachment through elastic deformation and geometric interlocking. The simplified structure reduces manufacturing complexity and assembly time.
Data Source
AI summary
An assembly including a drive motor and a gear plate. The gear plate includes a seat for retaining the drive motor. The assembly also includes a motor cap having at least one pawl for snap-fitting into the seat. The assembly further includes at least one post, which is adapted to receive a gear.