Motorcycle Headlight Compact Design via Rear Support
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Solution Overview
Problem
Conventional motorcycle headlights require a large size to facilitate aiming operations due to their structural design, which supports the light body's maximum outer diameter near the headlight case opening, limiting the possibility of a compact design while maintaining adjustability.
Innovation Solution
A motorcycle headlight design featuring a light body with a narrowed outer diameter from front to rear, supported by a ring member that pivotally locks to the headlight case at a position behind the lens, allowing for aiming operations without enlarging the ring member's outer circumference, and incorporating a concave part for improved workability and reduced headlight case size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the light body is supported at its maximum outer diameter near the opening of the headlight case, then the aiming operation can be performed, but the headlight case becomes large in size
Solution Approach 1:
Instead of supporting the light body at its maximum outer diameter near the opening as in conventional designs, this invention supports the light body at a position rearward of the lens where the outer diameter is smaller. The ring member surrounds the light body at this rearward position, inverting the conventional support location to achieve compact case size while maintaining aiming capability.
Solution Approach 2:
The support position is shifted from the front opening area to the rearward area of the headlight case, utilizing the depth dimension of the case. This dimensional shift allows the aiming operation to be performed from a rearward position, enabling a smaller front opening and overall compact case design.
2Ease of operation
If the ring member surrounds the maximum outer diameter part of the light body, then the light body can be supported for aiming operation, but the headlight case must be large to accommodate the ring member
Solution Approach 1:
The ring member is positioned to surround the light body at a rearward location where the outer diameter is smaller, rather than at the maximum outer diameter near the opening. This inversion of the support position reduces the required opening area while maintaining the ability to perform aiming operations.
3Reliability
If the headlight case surrounds the structural support part which surrounds the light body, then the light body is properly supported, but the headlight case becomes large in size
Solution Approach 1:
The support structure is inverted by positioning the ring member and headlight case support at a rearward location where the light body has a smaller diameter. This ensures reliable support of the light body while minimizing the volume required for the headlight case.
Solution Approach 2:
The ring member is nested within the headlight case at a rearward position, and the light body is nested within the ring member. This nested arrangement at a compact rearward location allows all components to be properly supported within a smaller overall case volume.
Data Source
AI summary
A headlight case, that houses a light body, is made small in size. The light body includes a reflector, and a lens attached to the reflector. The light body is pivotally supported in the headlight case by bolts extending through a ring member extending around the light body, so that an aiming operation can be performed. The ring member is connected to the light body behind the lens, and is locked to the headlight case at a position spaced away from an open edge thereof. A ring body of the ring member has an outer shape smaller than a maximum outer shape of the light body. A rim, to be fitted around the open end of the headlight case, has a lead that extends toward a position spaced away from the open end of the headlight case, to be fitted into a concave part of the headlight case.