Threaded Fluid Dispenser Closure With Indexed Tabbed Skirt Assembly
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Solution Overview
Problem
Existing fluid product dispensers with deformable fastening members face difficulties in screwing back onto the neck without causing deformation or requiring specific thread geometry, leading to sealing issues and material limitations.
Innovation Solution
A fluid product dispenser with a fastening member featuring angular indexing means and segmented tabs connected by hinges, allowing precise angular orientation and axial engagement without deformation, enabling secure and easy mounting on various neck materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the fastening member is made deformable to facilitate initial mounting, then mounting without screwing is enabled, but the thread geometry and sealing are compromised
Solution Approach 1:
The fastening member is divided into a rigid body and a separate deformable element (skirt or tab) that can be elastically deformed. The rigid body maintains structural integrity and thread precision for reliable rescrewing, while the deformable element provides initial mounting flexibility without compromising the threading system.
Solution Approach 2:
The fastening member utilizes elastic deformation of a specific element (skirt or tab) to change its dimensional parameters temporarily during initial mounting, allowing engagement without screwing. After mounting, the element returns to its original shape, preserving the thread geometry for future rescrewing operations.
2Manufacturing precision
If a rigid fastening member is used, then thread geometry is maintained, but it cannot be initially mounted without screwing
Solution Approach 1:
The fastening member is divided into a rigid body and a separate deformable element (skirt or tab) that can be elastically deformed. The rigid body maintains structural integrity and thread precision for reliable rescrewing, while the deformable element provides initial mounting flexibility without compromising the threading system.
Solution Approach 2:
The deformable element is pre-positioned in a state that allows easy initial engagement with the threaded neck. After the initial mounting, the element can be deformed or adjusted to achieve the final secure fastening, combining ease of initial mounting with reliable long-term fastening.
3Ease of operation
If the fastening member is made deformable, then initial mounting without screwing is enabled, but material selection is limited
Solution Approach 1:
The fastening member is divided into a rigid body and a separate deformable element (skirt or tab) that can be elastically deformed. The rigid body maintains structural integrity and thread precision for reliable rescrewing, while the deformable element provides initial mounting flexibility without compromising the threading system.
Solution Approach 2:
The fastening member combines different materials with complementary properties: a rigid material (such as metal or hard plastic) for the main body to ensure thread precision and durability, and a deformable material (such as elastomer or flexible polymer) for the mounting element to provide initial engagement flexibility. This composite structure enables compatibility with various neck materials including glass and plastic.
Data Source
AI summary
Fluid product dispenser having a reservoir (R) with a threaded neck (R1) forming an external helical thread (R2), a closure element (T) having a threaded skirt (F1) forming an internal helical thread (F2), and a band (H) engaging around the threaded skirt (F1). The skirt has tabs (F11), each forming a segment (F21) of the internal helical thread (F2). The fastening member (F) has an angular indexing mechanism for positioning it with respect to the external helical thread (R2) with a determined angular orientation, and the segments (F21) of the internal helical thread (F2) of the threaded skirt (F1) come into corresponding threaded contact with the external helical thread (R2) of the neck (R1) in the final assembly position.