Telescopic bracket and open-up device using the same
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Solution Overview
Problem
Existing open-up devices, such as those used in furniture and vehicles, require significant upward force to overcome gravity, making them laborious to operate and prone to mechanical failure due to the use of pneumatic rods that degrade over time.
Innovation Solution
A telescopic bracket system utilizing a spring with a trapezoidal, rectangular, square, or unequal quadrilateral cross-section to provide elastic restoring force, allowing for easy extension and retraction, and incorporating a screw rod mechanism with limiting members for secure operation, along with an actuating member for automatic control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pneumatic rod is used to assist opening, then labor is reduced, but reliability deteriorates due to pressure damage and decay over time
Solution Approach 1:
The patent replaces the pneumatic rod system with a spring-based mechanical system. The spring provides continuous elastic restoring force to assist opening without requiring pressurized gas or fluid, eliminating the reliability issues associated with pneumatic components while maintaining the labor-reduction benefit.
Solution Approach 2:
The spring mechanism is designed to automatically provide assisting force during opening and closing operations without requiring external control or maintenance. The elastic deformation and recovery of the spring creates a self-regulating system that adapts to the motion requirements naturally.
2Ease of operation
If a motor is used to automatically open the rear door, then ease of operation is improved, but energy consumption increases due to gravity resistance
Solution Approach 1:
The spring is positioned and configured to provide an upward elastic restoring force that counteracts the downward gravitational force on the door. This counterweight effect reduces the net force required from the motor, thereby reducing kinetic energy consumption while maintaining automatic operation capability.
Solution Approach 2:
The spring-based system provides dynamic assistance that varies throughout the opening and closing motion. The elastic force is maximum when the door is closed and decreases as the door opens, naturally matching the gravitational load profile and optimizing energy efficiency throughout the motion range.
3Ease of manufacture
If the spring cross section is circular, then manufacturing is easier, but structural strength is reduced compared to non-circular sections
Solution Approach 1:
The patent employs non-circular cross-sectional shapes (such as rectangular, square, or polygonal sections) for the spring. These asymmetric or angular geometries provide enhanced structural strength and resistance to buckling compared to circular sections, while modern manufacturing processes can produce these shapes with acceptable complexity.
Solution Approach 2:
The patent optimizes the spring's geometric parameters, including cross-sectional dimensions, shape factors, and coil configurations, to achieve the required strength-to-weight ratio. By carefully selecting and adjusting these parameters, the spring achieves both adequate strength and acceptable manufacturability with non-circular sections.
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 effortless opening and closing of heavy objects without manual labor, prevents objects from falling due to gravity, and allows for remote operation through an actuating member, reducing mechanical stress and power consumption.
Implementation Method 1
The spring is disposed between the fixed assembly and the moving member to provide an elastic restoring force to the moving member
Implementation Method 2
The screw rod has a first screw thread and is able to rotate on the body along the axial direction of the screw rod. The moving member sleeves on the periphery of the screw rod, and the inside of the moving member has a second screw thread corresponding to the first screw thread
Data Source
AI summary
A telescopic bracket has a retracted state and an extended state. The telescopic bracket comprises a fixed assembly, a moving member, and a spring. The moving member is movably coupled to the fixed assembly to move along an axial direction of the fixed assembly, causing the telescopic bracket to switch between the retracted state and the extended state. The spring is disposed between the fixed assembly and the moving member to provide an elastic restoring force to the moving member, and the cross section of the spring could be a trapezoidal shape, a rectangular shape, a square shape, a parallelogram shape, or an unequal quadrilateral shape. An open-up device using the telescopic bracket is also provided.