Vehicle Lamp Fixing Unit for Vibration Resistance
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Solution Overview
Problem
Vehicle lamps face challenges with the mounting and removal of lighting devices during maintenance, and the risk of detachment due to vibrations and temperature changes, which can cause fastening parts to loosen.
Innovation Solution
The vehicle lamp incorporates a fixing unit with a seat portion, fastening member, and elastic pressing member to securely hold the lighting device, using high thermal conductivity resin while minimizing the risk of breaking or cracking, and allowing for easy mounting and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a twist lock mounting method is used to facilitate mounting and removal of the lighting device, then the ease of operation is improved, but the reliability of the mounting connection deteriorates due to loosening under vibration and temperature changes
Solution Approach 1:
The mounting connection is divided into two independent systems: a twist lock mechanism for easy mounting/removal operation, and a separate fastening member (screw or rivet) for reliable vibration resistance. This segmentation allows each system to optimize for its specific function without compromising the other.
Solution Approach 2:
The lighting device is first mounted using the twist lock mechanism to achieve proper positioning and initial connection, then the fastening member is subsequently installed to secure the connection against vibrations. This preliminary action sequence ensures both ease of mounting and long-term reliability.
2Reliability
If a fastening member is added to prevent detachment under vibration, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The fastening member is integrated with the existing twist lock mounting structure rather than being a completely separate system. The fastening member utilizes the same mounting holes and structural features already present in the housing and lighting device, merging the vibration resistance function into the existing mounting architecture.
Solution Approach 2:
The mounting structure is designed to serve multiple functions: the twist lock mechanism provides both positioning and initial connection, while the fastening member provides vibration resistance. This multi-functionality reduces the need for additional specialized components, thereby limiting the increase in device complexity.
3Reliability
If the lighting device is securely fastened to prevent detachment, then the reliability is improved, but the ease of operation for maintenance deteriorates
Solution Approach 1:
The fastening system is segmented into a primary twist lock mechanism for easy removal and a secondary fastening member for secure attachment. During maintenance, the fastening member can be removed first, then the twist lock mechanism allows for simple rotational detachment, maintaining ease of operation despite the added security.
Solution Approach 2:
The mounting system transitions from a static secure connection to a dynamic removable connection through the two-stage fastening process. The fastening member provides static security during normal operation, while the twist lock mechanism enables dynamic removal during maintenance, adapting the connection characteristics to different operational states.
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 facilitates the mounting and removal of lighting devices during maintenance while preventing detachment during use, even in environments with significant vibrations and temperature fluctuations, and reduces the likelihood of damage to the flange portion.
Implementation Method 1
a pressing member that has elasticity and is disposed in the housing so that one end portion side is in contact with the flange portion
Data Source
Figure 1A~1C
Figure 2~3
Figure 4A~4C
AI summary
A vehicle lamp (100) according to an embodiment includes a lighting device (1); a housing (101) where the lighting device (1) is disposed; and a fixing unit (105 to 107) pressing the lighting device (1) against the housing (101). The lighting device (1) has a flange portion (12); a storage portion (11) protruding from one surface of the flange portion (12); and a light-emitting module (20) disposed in the end portion of the storage portion (11) on the side opposite to the flange portion (12) side and having a light-emitting element (22). The housing (101) has a hole (101a) where the storage portion (11) is disposed. The fixing unit (105 to 107) presses the flange portion (12) against the housing (101) in the vicinity of a peripheral edge of the hole (101a) where the storage portion (11) is disposed.