Timepiece Display Element with Embedded Metallic Insert
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Solution Overview
Problem
Existing display hands for timepieces face challenges such as limited decorative possibilities, high density leading to instability, and issues with attachment to drive shafts due to plastic deformation by creep when made from synthetic materials.
Innovation Solution
A display element with a body made of a material that softens, featuring an embeddable insert with a patterned outer surface for mechanical anchoring, which is embedded by melting to form a pipe for attachment to a drive shaft, thereby improving hold and reducing weight and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional materials (brass, steel, gold, aluminium) are used for display hands, then the hand has good mechanical strength and durability, but the decorative possibilities are limited and the density is high causing instability
Solution Approach 1:
The display hand is constructed as a composite structure combining a synthetic material body (acrylic, polycarbonate, or resin) with metallic inserts or accents. This allows the hand to achieve both lightweight properties and decorative metallic appearances, resolving the contradiction between versatility and density.
Solution Approach 2:
The patent changes the material parameters by using transparent or translucent synthetic materials instead of traditional opaque metals. This parameter change enables new decorative possibilities (light transmission, refraction effects) while reducing density and improving adaptability.
2Weight of moving object
If synthetic materials are used for display hands, then the weight is reduced and decorative possibilities improve, but the hand problems remaining attached to the drive shaft due to plastic deformation by creep
Solution Approach 1:
The synthetic material body is combined with metallic inserts or reinforcement elements that provide structural stability and resistance to creep deformation. This composite approach maintains the weight advantages of synthetic materials while eliminating the attachment stability problems.
Solution Approach 2:
The patent applies local reinforcement at critical stress points such as the drive shaft attachment area. By concentrating metallic or reinforced material specifically where mechanical stress occurs, the hand maintains overall lightweight properties while achieving local durability and attachment stability.
3Strength
If the hand is made with high density materials, then the mechanical strength is improved, but the moment of inertia increases causing the hand to float and slip during impact
Solution Approach 1:
The composite construction allows optimization of the mass distribution by placing heavier metallic elements only where structurally necessary for strength, while keeping the majority of the hand body lightweight. This resolves the contradiction between overall strength and impact stability.
Solution Approach 2:
The patent concentrates mass and strength properties locally at the drive shaft attachment point and other critical structural areas, while keeping the rest of the hand lightweight. This localized approach provides necessary mechanical strength without excessive moment of inertia that would cause floating or slipping during impact.
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
The solution enhances the mechanical anchoring and stability of the display element, reduces weight and manufacturing costs, and allows for a wider range of materials and shapes, addressing the limitations of prior art.
Implementation Method 1
said portion is made of a material having the property of softening, in which said insert is embedded by melting
Implementation Method 2
the outer surface being configured to ensure mechanical anchoring of the insert in said portion
Data Source
AI summary
A display element (1) intended to be fitted to a timepiece, including a body (2) provided with a portion (4) including an assembly area (5) configured to receive an insert (3) by embedding, the embeddable insert (3) being provided with a shaft hole (13) configured to adjust the display element (1) on a drive shaft, the body (2) including a portion (4) made of a material having the property of softening, in which the insert (3) is embedded by melting, the insert (3) including a peripheral wall (6) provided with a patterned outer surface (7a) for connection with the portion (4) of the body (2) of the display element (1), the outer surface (7a) being configured to ensure mechanical anchoring of the insert (3) in the portion (4), the peripheral wall (6) projecting, on either side respectively, from opposite faces of the portion (4) of the body (2).