A Study of Improving LED Table Lamp Structure by Using Modified TRIZ Method and Computer Aided Engineering Analysis

• Main Authors: Wei-Chang Lai, 賴威菖
• Other Authors: Zone-ching Lin
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/35mq9e

碩士 === 國立臺灣科技大學 === 自動化及控制研究所 === 99 === The paper uses multiple engineering analytical procedures of modified TRIZ contradiction matrix to carry out innovative design as well as research and development (R&D) of LED table lamp structure. First of all, related information is searched from the existing periodicals, patents and research papers. Focusing on the classification of technical functions of LED table lamp structure, and referring to the situation of structural forms, the paper defines the required improvement needs, and brings the needs and their corresponding engineering characteristics to a modified TRIZ clustering method according to the improvement priority of feature clusters, and then finds the corresponding feasible invention principles. Step-by-step improvement is made on compensation parameters and dimensional planning. Finite element software and heat transfer software are used to help simulate the analysis. Finally, the newly designed LED table lamp is compared to the existing patents, avoiding possible infringement of the existing patents and step by step achieving the need of improvement. The main modification of the paper can be divided into two major parts: cooling form of LED table lamp and assembling way of table lamp support structure. Regarding improvement of the cooling part, the commonly used cooling fins are firstly established. At the bottom of the cooling structure are established with a total of 12 LED lights. Let the average heat source of LED light be 1 watt/second. Through the heat transfer simulation software (FLUENT), the cooling situation is observed. Focusing on the part of insufficient cooling, modified TRIZ clustering is used to make improvement. In the improvement process, TRIZ clustering method is used to step by step improve the direction and shape of cooling fins, and step by step make cooling analysis. Finally, a fan is placed in the empty space between two fins, achieving a new kind of cooling structure. With the help of heat transfer simulation software, the temperature of the entire cooling structure is simulated, showing that the closer the distance of the fan from cooling fins, the better the cooling effect. Regarding the assembling way of the support structure of LED table lamp, the paper uses TRIZ clustering method to make step by step improvement, and then employs finite element method and mechanics equation to analyze and calculate the various new structures. After final innovation, the LED table lamp structure of the paper is acquired. The assembling way of the table lampshade is different from the assembling way of general table lamps that use screws. The assembling mechanism adopted is mainly the mating surface groove, which gives great convenience to assembling, and even saves screw materials and the corresponding tools. As to the shaft of the innovative LED table lamp support stand, this part is placed in the inside. Employing the layer-by-layer installation way and using a disc-shaped dome sheet to serve as an elastic component for replacement of general springs not only can increase beauty to its appearance, but also can prevent dust from adhering to it. Besides, the innovative support stand of LED table lamp in this study is an improved retractable support stand, which has the advantage of folding of the support stand. In addition, during height adjustment of the press-button bolt designed by the paper, it can eliminate the space occupied by the protruding of shaft between upper support stand and lower support stand caused by folding. For the abovementioned innovative LED table lamp support structure developed by the paper, since all the parts need no use of screw for fixing, no tool is required for assembling. After searching other related patents and validating that the various components have no possibility of infringement involved, the components of cooling structure and support structure of the related innovative LED table lamp are integrated to become an LED table lamp with complete and innovative structure. As shown from the research results of the paper, using the priority procedures of modified TRIZ clustering method can effectively help R&D workers to reduce their required R&D time. The paper’s use of the corresponding conflict matrix of the engineering feature parameter clusters with similar physical meaning, in terms of application, can reduce the waste of time on making wrong choices. According to the improvement priority of feature parameters, related procedures are carried out in proper order. Through step-by-step and logical contemplation, engineers are assisted to think, analyze and find solutions more efficiently, shortening their time on R&D.