Angular Clamping Device for Insect Screen Door Frame Attachment
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Solution Overview
Problem
Existing clamping devices for insect screen doors face challenges in attaching to door frames with limited installation space, particularly with semi-offset and flush frame sections, and struggle to withstand the torque exerted by aluminum framed doors while maintaining the opening function of both the original door and the insect screen door.
Innovation Solution
A clamping device with two angular mounting elements that can encompass the door frame from three sides, featuring a connecting element and an actuating element that changes the orientation of the mounting elements to generate a strong clamping force, allowing secure attachment without damaging the frame and accommodating limited space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a clamping device is designed to encompass the frame from three sides, then the attachment security is improved, but the device complexity increases
Solution Approach 1:
The clamping device is divided into two separate mounting elements (first and second mounting elements) that can be independently positioned and connected. Each mounting element encompasses the frame from two sides, and together they provide three-sided enclosure. This segmentation allows for simpler individual components while achieving the complex overall function of secure three-sided attachment.
2Strength
If the clamping device is designed to withstand torque from aluminum framed doors, then the strength is improved, but the device complexity increases
Solution Approach 1:
The mounting elements are pre-configured with connection means that enable them to work together as a unified structure capable of resisting torque. The preliminary design of the connection interface and the angular orientation of the mounting elements ensure that when assembled, the device can immediately withstand the torque forces from aluminum framed doors without requiring additional reinforcement or complex mechanisms.
3Ease of operation
If the clamping device is designed to accommodate limited installation space, then the ease of operation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The mounting elements are designed with angular orientations that allow them to adapt to slight variations in installation space. The connection means provide flexibility in assembling the mounting elements at the correct angle, enabling the device to accommodate limited installation space while maintaining manufacturing precision. The angular design allows the device to self-adjust within reasonable tolerances.
4Ease of operation
If the clamping device maintains the opening function of both doors, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The clamping device is designed to attach to the frame without interfering with the hinge mechanism or the opening function of either door. By extracting the clamping function from the door opening mechanism and positioning the mounting elements on the frame itself, the device maintains the opening function of both the original door and the insect screen door while providing secure attachment.
Data Source
Figure 1a~1b
Figure 1c~2
Figure 3
AI summary
The device (1) has two holding elements (8, 9) connected with each other, and a screw (13) and a nut (14) for connecting the holding elements and initializing clamping force. A direction changing element (23) i.e. rotary bearing, is coupled with one of the holding elements, and the other holding element is coupled at the screw and the nut. The changing element changes orientation of the holding elements relative to each other during actuation of the screw and the nut such that the clamping force is produced between the holding elements for fastening an insect protection grid door at a frame.