Winding drum of backlight diaphragm feed mechanism

Abstract

The invention discloses a winding drum of a backlight diaphragm feed mechanism, which solves the problems of complicated structure and high cost of the winding drum of an automatic diaphragm uncovering mechanism in the existing medium-sized or large-sized backlight diaphragm unit. The winding drum disclosed by the invention comprises a left end cover (4), a hollow cylinder (5) and a right end cover (6) which are sequentially connected to form a wheelset-shaped winding drum; three rising claw projecting holes (11) are formed at intervals of 120 DEG equal radian on the cylindrical surface of the hollow cylinder (5); a three-claw cylinder (7) is arranged in the inner cavity of the hollow cylinder (5); T-shaped expanding claws (12) are respectively arranged in the three expanding claw projecting holes (11); the tail of each T-shaped expanding claw is connected with a gas claw (13) of the corresponding three-claw cylinder (7) after passing through the expanding claw projecting hole (11); a hollow rotating shaft (2) is fixedly arranged in the center outside the left end cover (4); and the left end of the hollow rotating shaft (2) is communicated with an air passage inlet arranged in the left end cover (4). The invention provides an automatic diaphragm uncovering mechanism of a backlight diaphragm unit with a small dimension.

Description

technical field [0001] The invention relates to a reel of a coil material feeding mechanism, in particular to a raw material reel and a waste material reel of a various film coil feeding mechanism of a backlight unit with protective films on both sides. Background technique [0002] At present, a large number of small and medium-sized LCD displays use LED backlights. The LED backlight unit is composed of a plastic frame, a light guide plate, FPC, a diffusion film, a light-enhancing film, and a light-shielding film. During the production process of the LED backlight unit, it is necessary to accurately laminate the five layers of different functional films of lower diffusion, lower brightness enhancement, upper brightness enhancement, upper diffusion, and shading onto the semi-finished product consisting of a plastic frame and a light guide plate in sequence. In the entire production process, an important process is to remove the protective film attached to the front and back...

AI Technical Summary

Problems solved by technology

[0003] The reel of a backlight film feeding mechanism provided by the present invention solves the problem that the small backlight film unit in the prior art first cuts the backlight film roll material into required units, and then manually peels off the film by workers, resulting in high labor costs At the same time, there are also problems that the backlight film is easily polluted and damaged during the film removal process, and the reel structure of the automatic film laminating machine for medium and large backlight units is complicated and the controllability is not good.

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