Adjustable Projection Device with Secondary Reflection
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Solution Overview
Problem
Existing projection devices with fixedly arranged reflectors have a fixed optical path and optical distance, limiting their use in different environments and making it difficult to adjust the projected image, as they occupy large space and lack flexibility.
Innovation Solution
A small adjustable projection device based on secondary reflection, featuring a projector housing with a light source mechanism, a lens set, guide slots, a lifting support with adjustable reflectors, and a lead screw mechanism that allows for adjustment of optical distance and angle, enabling flexible use in various settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If reflectors are fixedly arranged outside the projector, then the optical path and optical distance are fixed, but this limits the use in different environments and makes it difficult to adjust the projected image
Solution Approach 1:
The patent applies the dynamics principle by transforming fixed reflectors into adjustable reflectors. Reflector a is made movable through a lifting device that can adjust its position vertically along guide slots, and its angle can be changed via a rotating motor. This dynamic adjustment capability allows the optical path and optical distance to be modified according to different projection environments, directly resolving the contradiction between adaptability and structural complexity.
Solution Approach 2:
The patent implements universality by designing a multi-functional reflector system. The adjustable reflector a can serve multiple purposes: adjusting optical distance by changing its vertical position, adjusting optical path by changing its inclination angle, and adapting to different projection distances and angles. This single adjustable component replaces multiple fixed components, enhancing versatility while controlling structural complexity.
2Ease of operation
If reflectors are fixedly arranged outside the projector, then the optical path is fixed, but the device occupies large space and cannot move flexibly
Solution Approach 1:
The patent applies the nesting principle by integrating the adjustable reflector a and fixed reflector b into the projector housing structure. The lifting support with guide slots is nested within the housing, and reflector a is nested within the space defined by the housing and guide slots. This nested arrangement allows the reflectors to be compactly integrated, reducing the overall space occupation while maintaining adjustability and flexibility.
Solution Approach 2:
The dynamics principle is applied through the lifting device that enables reflector a to move vertically along the guide slots. This movement capability provides flexibility in adjusting the optical path length and projection distance without requiring large fixed space. The rotating motor further enhances flexibility by allowing angular adjustment of reflector a, enabling the device to adapt to different projection angles and environments within a compact form factor.
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 device can precisely adjust the optical path and distance, reducing the overall volume, allowing for flexible placement and use in different environments, and improving projection quality by eliminating issues like the trapezoidal phenomenon.
Implementation Method 1
a lifting support is arranged on the guide slots, the lifting support is fitted to the guide slots via a lifting device
Implementation Method 2
one end of the connecting rod a is connected to a rotating motor used for adjusting the angle of inclination of the reflector a
Implementation Method 3
a reflector a with an adjustable angle is obliquely arranged on the lifting support, and a reflector b is fixedly and obliquely arranged below the lifting support
Implementation Method 4
the lifting device comprises a lead screw vertically arranged inside the guide slot
Data Source
AI summary
The projection device includes a projector housing, wherein a light source mechanism is provided on a right side of an internal bottom end of the projector housing, a lens set is arranged on a right side of the projector housing, two guide slots are vertically arranged on an inner wall on a left side of the projector housing, a lifting support is arranged on the two guide slots, the lifting support is fitted to the two guide slots via a lifting device, a first reflector is obliquely arranged on the lifting support, a second reflector is fixedly and obliquely arranged under the lifting support, and a direction of an inclination of the second reflector is opposite to a direction of an inclination of the first reflector.