Description:It should be understood that the figures are merely schematic and are not drawn to scale. It should also be understood that the same reference numerals are used throughout the figures to indicate the same or similar parts.
Figure 1 schematically depicts an exploded view of the luminaire consisting of end cap 4, counter sink screw 5, threaded suspension cap 6, GI wire rope suspension 18, inner support aluminium rod 2, PCB 3, and acrylic diffuser tube 1.
The acrylic diffuser tube acrylic diffuser tube 1 is a crucial element in the luminaire's design, the acrylic diffuser tube is customizable in length, providing versatility to meet specific lighting requirements. Its primary function is to act as a diffuser for the light source. Where acrylic, also known as polymethyl methacrylate (PMMA), is a transparent or translucent thermoplastic that has various applications due to its versatility, durability, and optical clarity. In the lighting industry, acrylic is commonly used for various purposes, including the production of light diffusers, lenses, fixtures, and acrylic tubes. With respect to this invention an acrylic tube is used to obtain uniform 360-degree homogenous uniform glow for the luminaire which contributes to the luminaire's aesthetic appeal.
One primary challenge revolves around heat dissipation in LED luminaires. The increasing use of LEDs demands efficient thermal management to ensure longevity and sustained performance. Conventional approaches often fall short in addressing this crucial aspect, prompting the need for novel design elements that can effectively dissipate heat, hence inner support aluminium rod 2 is an aluminium rod that plays two important roles in the luminaire, the first being internal structural integrity and second is in dissipating of the heat generated by the LED arrays in the PCB. In figure 8, the inner support aluminium rod 2 has a tapped hole in rod 15 which is used for assembling and securely fastening the end caps 4 of the luminaire.
In figure acrylic diffuser tube 1, the PCB 3 (printed circuit board) consists of LED (Light emitting diode) arrays which is the main source of illumination for the luminaire, the LED’s generate heat which needs to be dissipated into the environment to prevent failure of the LED, hence to achieve to ideal dissipation the PCB 3 is adhered to the inner support aluminium rod 2 with a thermally conductive adhesive tape which aids in transferring the heat generated from the LED to the inner support aluminium rod 2 via the PCB 3, since aluminium being a good conductor heat, it is used in this invention to effectively dissipate the heat.
The luminaire is equipped with end caps 4 that play a pivotal role in securing the acrylic diffuser tube and the square aluminium rod. These end caps feature slotted grooves 8, providing guidance for the acrylic diffuser tube 1 to sit securely, and tapped holes in rod 15, enabling the secure attachment of components using counter sink screws counter sink screw 5.
Counter sink screws 5 are utilized to secure the end cap 4 and the inner support aluminium rod 2 in the centre of the luminaire. Their flush placement enhances the luminaire's aesthetic appeal while ensuring a secure assembly.
The luminaire features a threaded suspension cap 6 designed to facilitate the secure suspension of the entire assembly. This cap is screwed into tapped through hole 9 in the end caps, providing a reliable connection point for the GI wire rope suspension 18. GI (Galvanized Iron) wire rope suspension, is a system designed to suspend luminaires, lighting fixtures, or other objects from ceilings or overhead structures. It provides a secure and adjustable method for hanging these objects at a desired height. It has ball bearing 3-point locking mechanism of the GI wire rope, accompanied with a quick spring release of the 3-point ball bearing in one direction only gives us the advantage of being to be able to adjust the suspension length.
Figure power cable 7 shows an exploded view of the luminaire at Direct current power supply side where positive and negative power cables 16 are the power supply cables which emerge out of power cable 7 , the luminaire at one end is suspended using GI wire rope suspension 18 and at the other end it is suspended using power cable 7, both the end caps on either side of the luminaire are suspended and secured with the aid of threaded suspension cap 6 , which screws into the end cap 4 at tapped suspension cap hole 11. The positive and negative power cables 16 are connected to the respective positive and negative terminals at the PCB, the cable is passed through intersection hole 14 , refer Figure PCB 3. The power cable 7 is passed through multiple points, the threaded suspension cap’s 6 hole, the tapped suspension cap hole 11, intersection hole 14 and cable through hole 10.
In Figure 2 the acrylic diffuser tube 1 sits in a slotted groove 8 which helps it guide and securely create a mechanical seal between end cap lipping 12 and end cap inner island end cap inner island 13, this is negative slotting is made to prevent the acrylic diffuser tube 1 from sliding out and also aiding in prevention of light leakage.
Figure 8 and 9 depict the inner support aluminium rod 2 and counter sink screw 5 respectively. The tapped hole in rod 15 is made to accommodate the counter sink screw 5, the main purpose of this invention is to securely hold the end caps 4 to the inner support aluminium rod 2 and the acrylic diffuser tube 1.
The acrylic diffuser tube 1 comes in standard lengths of inner support aluminium rod 2 meters, so the entire luminaire can be of a maximum length of inner support aluminium rod 2 meters.
The cable routing methodology for the power cable 7 is an innovative aspect pertaining to this invention, as mentioned earlier, one end of the luminaire is suspended using a power cable 7, which contains positive and negative power cables 16, this seamless integration aids in the aesthetic appeal of the luminaire.
The slotted groove 8 creation in the end cap creates end cap inner island 13 and end cap lipping 12 which assist in two pivotal functions, namely in preventing light leakage from the crevices where the acrylic diffuser tube 1 meets the end cap 4 and in aiding the acrylic diffuser tube 1 to be placed securely in a fixed position and prevent any moments.
The presented invention is mainly suitable for the application of meeting rooms, conference tables and cabins where an average of 250-300 lux levels are required at the standard work plane height. This invention is also suitable for decorative application, such as in recreational areas, breakout zones, collaborative areas and cafeterias where this luminaire can create an aesthetic architectural element and also serve the purpose of illuminating spaces.
, Claims:1. A Lunnark Decorative Functional Acrylic Glo Luminaire, comprising:
a. An end cap (4) designed for efficient light containment and structural integrity.
b. A square aluminum rod (2) centrally positioned for optimal heat dissipation and mounting of LED arrays.
c. A modular printed circuit board (PCB) (3), mounted on all four surfaces of the aluminum rod (2) using thermal tape, for uniform light emission.
d. An acrylic diffuser tube (1), seamlessly fitting into the end cap (4) to create a light-leak-proof and insect-resistant seal.
e. Countersunk screws (5) for a flush and aesthetically pleasing assembly.
f. A dual-purpose DC transparent power cable (7), uniquely designed to pass through the end cap's various holes (10, 11, 14) and the threaded suspension cap (6), integrating the power supply with the suspension mechanism for an enhanced aesthetic appeal.
g. A threaded suspension cap (6), specifically designed to screw into the tapped suspension cap hole (11) in the end cap (4), providing a secure and elegant means of suspending the luminaire.
2. The Luminaire of Claim 1, wherein the end cap (4) is meticulously designed with a precision slot for the acrylic diffuser tube (1), ensuring a secure fit and preventing light leakage, thereby contributing to the overall aesthetic and functional integrity of the luminaire.
3. The Luminaire of Claim 1, wherein the square aluminum rod (2) serves as an efficient heat sink, dissipating heat generated by the LEDs to enhance the performance and longevity of the luminaire.
4. The Luminaire of Claim 1, wherein the aluminum rod (2) is mounted in the precise centre of the luminaire by milling holes in the centre of the end cap (4), ensuring uniform light distribution and contributing to the aesthetic appeal.
5. The Luminaire of Claim 1, wherein the inner support aluminum rod (2) includes tapped holes for secure attachment to the end cap (4), thereby stabilizing and securing the entire assembly.
6. The Luminaire of Claim 1, featuring a DC transparent cable (7) that innovatively functions as both a suspension cable and a power supply, threading through a hole in the end cap (4) via the threaded suspension cap (6), maintaining the luminaire’s sleek design.
7. The Luminaire of Claim 1, wherein the end cap (4) features a tapped hole designed to accommodate the threaded suspension cap (6), ensuring a secure and stable suspension of the luminaire.
8. The Luminaire of Claim 1, wherein the end cap (4) assembly comprising a tapped suspension cap hole (11) for engaging a threaded suspension cap (6), an intersection hole (14) and a cable through hole (10) for routing a power cable (7), and a tapped through hole (9) for a countersink screw (5), all integrated with end cap lipping (12), end cap inner island (13), and a slotted groove (8) designed to secure the acrylic diffuser tube (1) in place while preventing light leakage.
9. The method of assembly for a luminaire as claimed in Claim 1, wherein the acrylic diffuser tube (1) is inserted into the end cap (4) slot, the square aluminum rod (2) with the PCB (3) affixed via thermal tape is centered within the luminaire, and the countersunk screws (5) are employed to secure the end cap (4) to the aluminum rod (2), thereby achieving the intended design of light distribution and aesthetic contour, with the DC transparent power cable (7) being threaded through the corresponding holes to complete the assembly and suspension of the luminaire.