Mast Attachment With Articulated Latching For Luminaire Orientation
Solution Overview
Problem
Conventional fastening devices for lamps on light poles lack the angular flexibility needed to securely attach lamps at various orientations relative to the pole, limiting the ability to adjust the lamp's position and orientation.
Innovation Solution
A fastening device featuring two holding elements with disk and guide sections, a guide channel, and latching surfaces, allowing for limited rotation and displacement to securely attach lamps over a wide angular range, preventing twisting and enabling adjustable lamp positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the connection element is connected to the attachment part via a short curved plane with fixed locking positions, then stable attachment is guaranteed, but the angular adjustment range is limited to approximately 0 to 20 degrees
Solution Approach 1:
The curved plane is divided into multiple discrete locking positions with angular spacing, allowing the connection element to be positioned at specific angles (e.g., 0°, 15°, 30°, 45°, 60°, 75°, 90°) while maintaining stable attachment at each position. This segmentation enables wide angular adjustment while preserving reliability at each discrete angle.
Solution Approach 2:
The connection element is designed to be movable relative to the attachment part, transitioning from a fixed rigid connection to a dynamically adjustable connection. The element can be displaced along the curved plane to different locking positions and fixed at each position, providing adaptability while maintaining stability through the locking mechanism.
2Ease of operation
If the cylinder section has a diameter only slightly larger than the pole spigot (less than 10%, preferably less than 5%), then easy longitudinal mounting is achieved, but the fit may be too loose for secure clamping
Solution Approach 1:
The cylinder section is divided into an outer cylindrical mounting surface for easy sliding onto the spigot and an inner clamping structure with separate clamping elements. This segmentation allows the mounting surface to provide easy longitudinal installation while the inner clamping mechanism provides secure fixation through localized gripping forces.
Solution Approach 2:
Clamping elements act as intermediaries between the cylinder section and the pole spigot. These elements can be adjusted independently to provide secure clamping force on the spigot while the cylinder section itself maintains a loose fit for easy mounting. The clamping elements transfer and concentrate the clamping force at specific points.
Data Source
Figure 1
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AI summary
The invention relates to a securing device (1) for securing a luminaire (1) on a mast top, comprising an attachment (3) and a connection element (4) as two main elements. The attachment (3) has a cylinder portion (31) for placing on a mast top, said cylinder portion extending in a longitudinal direction over a cylinder length. The connection element (4) is designed for connecting the luminaire (2) and is connected to the attachment (3) via an articulated connection. The securing device (1) comprises two retaining elements (5, 6), each of which has a disk (50, 60) and a guide portion (52, 62) which runs away from the disk (50, 60) over a guide portion length. The guide portion (52, 62) has a constant cross-section at least along some sections, and the disk (50, 60) has a toothing structure (51, 61) on one of the disk faces. A first of the two main elements (3, 4) has a guide channel (7) for receiving the guide portions (52, 62) of the two retaining elements (5, 6), and the second of the two main elements (3, 4) has two latching surfaces (40). The guide channel (7) runs in a transversal direction and has a cross-section which corresponds to the guide cross-section, and the retaining elements (5, 6) can be arranged in the guide channel (7) and can be moved in the transversal direction. The latching surfaces (40) are mutually spaced in the transversal direction, and each latching surface has a latching structure (41) which corresponds to the toothing structure (51, 61) of the disk faces. The first main element (3, 4) comprises a moving element (9) which interacts with the retaining elements (5, 6) in an assembly position of the securing device (1) and which is designed to move the retaining elements (5, 6) in the transversal direction in the guide channel (7) by applying a force. The retaining elements (5, 6) in the guide channel (7) and the latching surfaces (40) are arranged relative to one another such that the toothing structures (51, 61) of the retaining elements (5, 6) can be pressed against the latching surfaces (40) of the second main element (3, 4) by means of the moving element (9).