Screw Head with Internal Drive Members for Hidden Actuation
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Solution Overview
Problem
Existing screws for securing articles like leather goods, jewelry, cosmetics, and furniture often have visible actuation imprints, which can be aesthetically unpleasing, and require complex systems with nuts and counter-shapes for secure attachment and detachment.
Innovation Solution
A screw design featuring a head with an internal part that includes radially extending drive members accessible by an actuation tool, allowing for torque transmission without visible actuation imprints, and an actuation tool with complementary drive members to securely attach and detach the screw from a support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a conventional screw with a head imprint is used, then the screw can be easily actuated by a screwdriver, but the imprint remains visible on the article surface, compromising aesthetics
Solution Approach 1:
The screw head is segmented into two distinct parts: an external part that contacts the article surface and remains visually clean, and an internal part that contains the drive members and is accessible only to the actuating tool. This segmentation allows the aesthetic external surface to be separated from the functional internal mechanism, resolving the contradiction between visible appearance and operational functionality.
2Shape
If a cover is placed on the screw head to conceal the imprint, then aesthetics are improved, but the device complexity increases and operation becomes less convenient
Solution Approach 1:
Instead of covering the drive members from the outside with a separate cover component, the invention inverts the approach by placing the drive members inside the head structure itself, accessible through a controlled interface. This eliminates the need for separate cover components while maintaining aesthetic appearance and operational convenience.
3Reliability
If a nut and counter-shape system is used to prevent free rotation, then secure attachment is achieved, but the device complexity and number of components increases
Solution Approach 1:
The invention merges multiple functions into the screw head structure itself: the drive members provide both torque transmission and rotational control, eliminating the need for separate nuts and counter-shapes. The head structure integrates the functions of torque application and rotation prevention that were previously distributed across multiple components, reducing overall system complexity while maintaining secure attachment reliability.
Data Source
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AI summary
The invention relates to a screw (4) configured to mechanically fasten at least a first part (2) of an article (1) to any support (3), the screw (4) comprising a head (7) and a body (8) extending longitudinally projecting from the head (7), the head (7) comprising an external part (18) and an internal part (19) interposed between the external part (18) and the body (8), the body (8) being at least partially threaded, the screw (4) being characterized in that the internal part (19) of the head (7) comprises at least one drive member extending radially beyond the external part (18) and being configured to be driven and rotated by an actuating tool (10) so as to screw and/or unscrew the screw (4) and thus mechanically fasten and/or unfasten at least a first part (2) of the article to the support (3). any.