Vehicle Monitor Rack-and-Pinion Height and Tilt Adjustment
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Solution Overview
Problem
Conventional display devices for vehicles face limitations in tilt adjustment flexibility due to the need for complex structures and increased depth dimension, as the raising and lowering operations and tilt operations are interdependent, restricting optimal positioning and compatibility with vehicles of varying space constraints.
Innovation Solution
A display device configuration featuring a rack and guided member system with a raising and lowering gear and a pivot gear, where one is rotatably supported by the shaft and the other is unrotatably supported, allowing independent adjustment of the monitor's height and tilt without affecting the depth dimension, utilizing a rack-and-pinion mechanism and separate drive mechanisms for each operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the conventional guide hole and shaft structure is used for raising and lowering and tilt operations, then the monitor can be raised and lowered and tilted, but the tilt adjustment is limited to one location and the structure becomes complicated with increased depth dimension
Solution Approach 1:
The patent divides the raising/lowering and tilt operations into independent functional modules: a rack-and-pinion mechanism for height adjustment and a separate pivot mechanism for tilt adjustment. The first shaft is dedicated to raising and lowering, while the second shaft handles tilt operations. This segmentation allows each mechanism to operate independently, enabling tilt adjustment at any height position without requiring additional guide holes, thus reducing structural complexity while improving adaptability.
Solution Approach 2:
The patent repositions the pivot mechanism to rotate about an axis that is offset from the rack's longitudinal axis, creating a three-dimensional arrangement where the tilt rotation axis and the raising/lowering rack axis are spatially separated. This dimensional arrangement allows the tilt function to operate independently of the height adjustment mechanism, eliminating the need for multiple guide holes and reducing the overall depth dimension of the device.
2Adaptability or versatility
If multiple guide holes and shafts are provided for tilt adjustment, then tilt function is achieved, but the depth dimension of the display device becomes large
Solution Approach 1:
The patent merges the tilt rotation function with the existing shaft structure by having the second shaft serve dual purposes: supporting the rack for raising/lowering operations and acting as the rotation axis for tilt adjustment. The guide member is designed to slide along the first shaft while the second shaft provides the tilt pivot. This merging of functions into shared structural elements eliminates the need for separate third guide holes and shafts, significantly reducing the depth dimension while maintaining full tilt capability.
3Ease of operation
If the raising and lowering operation and tilt operation are switched according to engagement position, then the mechanism operates, but the height position for tilt adjustment is limited
Solution Approach 1:
The patent implements a dynamic system where the guide member can slide along the first shaft to any position, and the second shaft can rotate about any point along its length. This dynamic configuration allows the tilt operation to occur at any height position rather than being fixed to a specific engagement point. The rack-and-pinion mechanism dynamically adjusts the height, while the pivot mechanism dynamically tilts at the current height, providing continuous adaptability across the full range of motion.
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
Enables smooth and balanced raising and lowering, as well as tilt adjustments regardless of the monitor's height position, reducing the overall depth dimension of the device and enhancing usability in vehicles with limited space.
Implementation Method 1
a rack and a guided member mounted on a back face of the monitor so as to extend parallel to each other in a height direction of the monitor, a raising and lowering gear that meshes with the rack
Implementation Method 2
a guide member that guides the guided member in a manner capable of raising and lowering
Implementation Method 3
a shaft rotatably supported by the base so as to extend in a width direction of the monitor, wherein one of the raising and lowering gear and the guide member is rotatably supported by the shaft and the other is unrotatably supported by the shaft
Data Source
AI summary
A shaft is rotatably supported by an upper housing (base), a raising and lowering gear for a monitor is rotatably supported by the shaft, and a pivot gear and a guide member are unrotatably supported by the shaft. A rack and a guide rail are disposed on the back face of the monitor such that the raising and lowering gear meshes the rack and the guide member slidably engages with the guide rail. When the raising and lowering gear rotates by a drive source of a first motor, the guide rail is guided by the guide member to move upward and downward, and accordingly, the height position of the monitor is adjusted. When the pivot gear rotates by a drive source of a second motor, the guide member rotates along with the shaft, and accordingly, the tilt angle of the monitor is adjusted.