Vehicular Lamp Light Guide Assembly for Cost Reduction
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Solution Overview
Problem
Conventional vehicular lamps have complex assembly processes and increased component counts, leading to higher costs and reduced workability due to the need for separate cord connections and additional parts.
Innovation Solution
The vehicular lamp design incorporates a light guiding body composed of two divided pieces aligned in the axial direction, with one piece fixed to the housing and the other to the extension, eliminating the need for separate wiring and integrating the light source and control substrates into a common substrate, reducing the number of components and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the light guiding body is divided into two pieces with separate fixing methods, then the assembly workability is improved and wiring is eliminated, but the structural complexity increases
Solution Approach 1:
The light guiding body is divided into a first light guiding body and a second light guiding body, allowing separate assembly and fixation. The first piece is fixed to the housing while the second piece is fixed to the extension, enabling modular assembly that eliminates the need for separate cord connections and reduces wiring complexity.
Solution Approach 2:
The light source substrate and control substrate are integrated into a single common substrate, reducing the number of separate components. This merging of functions into one substrate simplifies the overall structure while maintaining all necessary functionalities, directly addressing the contradiction by reducing component count without sacrificing ease of manufacture.
2Reliability
If separate cord connections and additional parts are used, then the reliability of electrical connection is improved, but the number of components increases and costs rise
Solution Approach 1:
The light source substrate and control substrate are combined into a single common substrate that integrates both functions. This eliminates the need for separate cord connections between the substrates, reducing the number of components while maintaining reliable electrical connections through integrated circuitry on the common substrate.
Solution Approach 2:
The unnecessary cord connections and intermediate components are extracted and removed from the system. By directly integrating the electrical connections on the common substrate, the patent eliminates redundant parts while preserving the essential electrical connectivity needed for reliable operation.
3Adaptability or versatility
If multiple separate substrates and components are used, then the functional versatility is improved, but the assembly process becomes more complex and time-consuming
Solution Approach 1:
The light source substrate and control substrate are merged into a single common substrate that performs both functions. This integration maintains the functional versatility of having both light source control and illumination control capabilities while significantly simplifying the assembly process by reducing the number of components that need to be handled and connected.
Solution Approach 2:
The common substrate serves multiple functions simultaneously, acting as both the light source substrate and the control substrate. This multi-functionality approach maintains the versatility needed for complex lamp operations while improving productivity by reducing assembly steps and component count.
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 improves assembly workability by eliminating wiring and reducing the number of components, thereby lowering production costs and enhancing the overall efficiency of the lamp's assembly process.
Implementation Method 1
light having a high directivity emitted from a light-emitting diode (LED) to the inside of a light guiding body and causing the light to be outputted from the light guiding body
Implementation Method 2
The light guide inner lens 107 has a parabolic incidence surface 107a formed at the rear end thereof in the longitudinal direction
Data Source
AI summary
Provided is a vehicular lamp capable of achieving cost reduction by improving assembling workability and reducing the number of parts. The vehicular lamp includes a housing and an outer lens that covers the front opening of the housing to define a light chamber; and an LED, a light guide inner lens that guides light emitted from the LED, a light source substrate on which the LED is mounted, an extension arranged around the light guide inner lens, and a power supply unit fixed to the housing, which are accommodated in the light chamber. The light guide inner lens is composed of first and second divided pieces that are arranged in an axial direction of the light guide inner lens, and the first divided piece is fixed to the housing together with the light source substrate and the second divided piece is fixed to the extension.