Auto-Closing Device with Adjustable Spring Tension
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Solution Overview
Problem
Conventional auto-closing devices for sliding doors provide a constant, non-adjustable spring force, making them unsuitable for door panels of varying weights, leading to either excessive bumping force or insufficient movement, and are inconvenient for users.
Innovation Solution
An auto-closing device comprising a base, cylinder, slider, spring, and adjusting device, where the adjusting device allows for the adjustable spring force by using a rotatable adjusting bolt to modify the spring's tension, ensuring suitable force for different door panel weights.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional auto-closing device with a constant spring force is used, then the device structure is simple, but the pulling force cannot be adjusted for different door panel weights, causing either excessive bumping force or insufficient movement
Solution Approach 1:
The spring force is made adjustable through an adjusting device that allows the spring pre-compression length to be modified. This transforms the static, fixed-force spring system into a dynamic one where the pulling force can be adapted to different door panel weights by rotating the adjusting bolt to change the spring's initial compression state.
Solution Approach 2:
The pulling force parameter of the spring is made changeable through the adjusting device. By rotating the adjusting bolt, the pre-compression length of the spring is modified, which directly changes the spring force parameter. This allows the same spring to provide different pulling forces suitable for different door panel weights without replacing the spring itself.
2Object-affected harmful factors
If a constant spring force is applied, then the device is easy to manufacture, but the moving speed of light door panels increases causing large bumping force and damage
Solution Approach 1:
The spring force parameter is adjusted based on the door panel weight. For light door panels, the spring pre-compression is reduced to lower the pulling force, thereby controlling the moving speed and reducing bumping force. For heavy door panels, the pre-compression is increased to provide sufficient pulling force. This parameter adjustment prevents damage while maintaining manufacturing simplicity.
3Ease of operation
If a constant spring force is used, then the device structure is simple, but a large force is necessary for users to open or close the door panel, making it inconvenient to use
Solution Approach 1:
The spring force is made dynamically adjustable to match different door panel weights. By adjusting the spring pre-compression through the adjusting device, the pulling force is optimized for each specific door, reducing the effort users need to exert to open or close the door. This improves ease of operation while adding only a simple adjusting mechanism.
4Force
If the spring force is increased for heavy door panels, then sufficient pulling force is provided, but the moving speed becomes too fast for light door panels causing damage
Solution Approach 1:
The spring force parameter is precisely adjusted according to the door panel weight. By modifying the spring pre-compression length through the adjusting device, the pulling force is optimized to provide sufficient force for heavy panels without excessive speed for light panels. This parameter matching ensures both force adequacy and speed control for different applications.
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 provides a versatile and convenient solution by adjusting the spring force to match the weight of the door panel, preventing damage and ensuring smooth operation, whether the door is light or heavy.
Implementation Method 1
The spring provides a pulling force to the door panel to move the door panel to an original position
Implementation Method 2
The buffering cylinder provides a buffering effect to the door panel to prevent the door panel bumping with a door frame
Implementation Method 3
The adjusting device allows for the adjustable spring force by using a rotatable adjusting bolt to modify the spring's tension
Data Source
AI summary
An auto-closing device has a base, a cylinder, a slider, a spring and an adjusting device. The adjusting device is connected to an end of the spring opposite to the slider and has an adjusting frame and an adjusting bolt. The adjusting frame has a first end connected securely to the spring and a second end provided with a threaded hole. The adjusting bolt is mounted rotatably on the base and is screwed into the threaded hole in the adjusting frame. Accordingly, when the adjusting bolt is rotated, the adjusting frame is moved relative to the body so that the pulling force provided by the spring is adjusted to fit with different door panels with different weights.