Toggle fastener
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Solution Overview
Problem
Existing toggle dowels are difficult to assemble due to the need for additional tools and manual alignment, and the bracket element often twists during screw tightening, making the mounting process time-consuming and complicated.
Innovation Solution
A toggle dowel design featuring a screw element with an external thread, a bracket element with a nut element having an internal thread, and guide elements that allow the bracket element to pivot and be guided during assembly, eliminating the need for additional tools and ensuring proper alignment without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the bracket element is designed to automatically tilt due to lever conditions, then the toggle dowel can be installed in horizontal assembly direction, but additional tools are needed for installation in different directions
Solution Approach 1:
The bracket element is designed with a pivotable connection to the screw element, allowing it to dynamically change its orientation from horizontal (for insertion) to vertical (for fastening). This dynamic adaptability enables the toggle dowel to be installed in different directions without requiring additional tools, while maintaining automatic tilting functionality through the pivot mechanism.
2Strength
If the bracket element is designed to twist when the screw element is actuated, then the screw can be tightened, but the installer must use additional tools or press on the bracket element to ensure torque absorption
Solution Approach 1:
A guide element is introduced as an intermediary component between the bracket element and the screw element. This guide element prevents the bracket element from twisting during screw actuation by providing a guiding surface that constrains the bracket element's movement, allowing torque to be effectively transmitted to the screw element without requiring additional tools or manual pressing.
3Strength
If the bracket element must be pulled against the mounting surface to tighten the screw, then torque can be applied, but the mounting process becomes more time-consuming and complicated
Solution Approach 1:
The guide element serves as a mediator that eliminates the need to pull the bracket element against the mounting surface during tightening. By providing a guiding surface that automatically positions and constrains the bracket element, the guide element allows torque to be applied directly to the screw element through normal rotational motion, significantly reducing mounting time and simplifying the process.
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
A toggle bolt (1) comprises a screw element (2) extending along a central axis (M) with an external thread (3), a stirrup element (4) extending along a principal axis (H), and a nut element (5) with an internal thread (6) into which the external thread (3) engages. The nut element (5) is pivotably mounted about a pivot axis (S) in at least one bearing opening (7) in the stirrup element (4). The stirrup element (4) is pivotable from a mounting position in which the principal axis (H) runs substantially parallel to the central axis (M) to a fastening position in which the principal axis (H) runs substantially transversely to the central axis (M). The stirrup element (4) is movable in the direction of the central axis (M) when the screw element (2) is actuated. Furthermore, the toggle bolt (1) has at least one guide element (8, 9) for guiding the stirrup element (4) when the screw element (2) is actuated.