Laser dotting device for light guide plate

Abstract

The utility model discloses a laser dotting device for a light guide plate, which comprises a base, a positioning table and a laser support are connected onto the base in a sliding manner, a plurality of adsorption holes are arranged on the positioning table, a dotting laser is arranged on the laser support, a liftable pressing plate is arranged above the positioning table, and the adsorption holes are communicated with the dotting laser. The positioning table is internally provided with the cavity, the cavity is connected with the negative pressure fan through the pipeline, the light guide plate can be effectively, rapidly and flatly adsorbed on the positioning table, the load of the negative pressure fan is prevented from being increased, and the positioning and adsorption effect of the light guide plate is improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of light guide plate production equipment, and more specifically relates to a laser dotting device for light guide plates. Background Technology

[0002] In order to make the light-emitting surface of the light guide plate emit uniform light, a diffuse reflection layer is set on the light-emitting surface of the light guide plate. Generally, a micro-structure array of a certain size is engraved on the front (light-emitting surface) and back reflective surface of the light guide plate according to a program by laser irradiation vaporization. It has the advantages of high dot-mapping efficiency and high array accuracy.

[0003] Since light guide plates are usually thin, warping and bending are unavoidable during production and transportation. Therefore, it is necessary to ensure that the light guide plate is level when laser marking. Patent technology with publication number CN212191698U discloses a laser marking machine for light guide plates, which is equipped with a positioning platform. The positioning platform is equipped with several adsorption holes. The negative pressure generated by the adsorption holes can keep the bent and warped light guide plate in a horizontal state, thereby improving the marking accuracy.

[0004] However, if there are gaps on the surface of the positioning platform for the warped edge of the light guide plate, a large suction force is required to adsorb the warped edge. At this time, other suction holes are covered by other parts of the light guide plate, which will greatly increase the load on the negative pressure fan. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a laser dotting device for a light guide plate, which can effectively and quickly adsorb the light guide plate flatly onto the positioning stage, avoiding increasing the load on the negative pressure fan and improving the positioning and adsorption effect of the light guide plate.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a laser dotting device for a light guide plate, comprising a base, a positioning platform and a laser bracket slidably connected on the base, a plurality of adsorption holes being provided on the positioning platform, a dotting laser being provided on the laser bracket, a liftable pressure plate being provided above the positioning platform, and a cavity being provided inside the positioning platform, the cavity being connected to a negative pressure fan through a pipe.

[0007] Furthermore, the pressure plate is provided with several mutually perpendicular first pressure strips and second pressure strips, which are interlaced to form multiple "well" shapes.

[0008] Furthermore, electric telescopic rods are provided on both sides of the positioning platform, and the electric telescopic rods are connected to pressure plates.

[0009] Furthermore, the electric telescopic rod passes through the pressure plate, and a fixing plate is provided at the end through which it passes. A spring is provided between the fixing plate and the pressure plate. The spring is sleeved on the rod part of the electric telescopic rod, and the two ends of the spring are respectively connected to the fixing plate and the pressure plate.

[0010] Furthermore, the fixed plate is threadedly connected to the electric telescopic rod.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: when the positioning platform on which the light guide plate is positioned moves to the bottom of the pressure plate and aligns with the pressure plate, the pressure plate descends and presses down on the light guide plate to flatten it. Then, the negative pressure fan starts and completely adsorbs the light guide plate onto the plane of the positioning platform through the adsorption holes. By first flattening the light guide plate with the pressure plate and then adsorbing it, the bending and warping of the light guide plate and the large gap between it and the adsorption holes are avoided, which would increase the load on the negative pressure fan. At the same time, the positioning and adsorption effect of the light guide plate is improved. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the laser dotting device for the light guide plate of this utility model;

[0013] Figure 2 This is a schematic diagram of the pressure plate in the laser dotting device of the light guide plate of this utility model.

[0014] Reference numerals: 1. Base; 2. Positioning platform; 3. Laser bracket; 4. Adsorption hole; 5. Dot laser; 6. Pressure plate; 7. Cavity; 8. First pressure bar; 9. Second pressure bar; 10. Electric telescopic rod; 11. Fixing plate; 12. Spring. Detailed Implementation

[0015] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0016] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0017] Reference Figure 1 and Figure 2 The present invention will be further described below.

[0018] A laser dotting device for a light guide plate includes a base 1, a positioning platform 2 and a laser bracket 3 slidably connected to the base 1, a plurality of adsorption holes 4 are provided on the positioning platform 2, a dotting laser 5 is provided on the laser bracket 3, a liftable pressure plate 6 is provided above the positioning platform 2, and a cavity 7 is provided inside the positioning platform 2. The cavity 7 is connected to a negative pressure fan (not shown in the figure) through a pipe.

[0019] like Figure 1 As shown, when the positioning platform 2, on which the light guide plate is positioned, moves to below the pressure plate 6 and aligns with the pressure plate 6, the pressure plate 6 descends and presses down on the light guide plate to flatten it. Then, the negative pressure fan starts and completely adsorbs the light guide plate onto the plane of the positioning platform 2 through the adsorption hole 4. By first flattening the light guide plate with the pressure plate 6 and then adsorbing it, the bending and warping of the light guide plate and the large gap between it and the adsorption hole 4 are avoided, which would increase the load on the negative pressure fan. At the same time, the positioning and adsorption effect of the light guide plate is improved.

[0020] like Figure 2 As shown in this example, preferably, the pressure plate 6 is provided with a plurality of mutually perpendicular first pressure strips 8 and second pressure strips 9, and the first pressure strips 8 and second pressure strips 9 are interlaced to form multiple "well" shapes.

[0021] like Figure 1 As shown in this example, preferably, the positioning platform 2 is provided with electric telescopic rods 10 on both sides, the electric telescopic rods 10 are connected to the pressure plate 6, and the pressure plate 6 is raised and lowered by the electric telescopic rods 10.

[0022] like Figure 1 As shown, in this preferred embodiment, the electric telescopic rod 10 passes through the pressure plate 6, and a fixing plate 11 is provided at the end through which it passes. A spring 12 is provided between the fixing plate 11 and the pressure plate 6. The spring 12 is sleeved on the rod portion of the electric telescopic rod 10, and the two ends of the spring 12 are respectively connected to the fixing plate 11 and the pressure plate 6.

[0023] Specifically, when the pressure plate 6 is in the upper position, it is in a natural hanging state and is kept stable by the spring 12. When the electric telescopic rod 10 drives the pressure plate 6 to descend and presses the pressure plate 6 onto the light guide plate, the spring 12 will be compressed as the fixed plate 11 continues to descend, thereby gradually increasing the pressure on the light guide plate and avoiding damage to the light guide plate due to excessive pressure in an instant. At the same time, when the pressure plate 6 is lifted and released, the pressure on the light guide plate is gradually reduced.

[0024] In this example, preferably, the fixing plate 11 is threadedly connected to the electric telescopic rod 10, and the position of the fixing plate 11 can be adjusted to change the initial hanging height of the pressure plate 6.

[0025] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A laser dotting device for a light guide plate, characterized in that: The device includes a base, on which a positioning platform and a laser bracket are slidably connected. The positioning platform is provided with several adsorption holes, and the laser bracket is provided with a dotting laser. A liftable pressure plate is provided above the positioning platform, and a cavity is provided inside the positioning platform. The cavity is connected to a negative pressure fan through a pipe.

2. The laser dotting apparatus for a light guide plate according to claim 1, wherein: The pressure plate is provided with several mutually perpendicular first pressure strips and second pressure strips, which are intersected to form multiple "well" shapes.

3. The laser dotting apparatus for a light guide plate according to claim 1, wherein: Electric telescopic rods are provided on both sides of the positioning platform, and the electric telescopic rods are connected to the pressure plate.

4. The laser dotting apparatus for a light guide plate according to claim 3, wherein: The electric telescopic rod passes through the pressure plate, and a fixing plate is provided at the end through which it passes. A spring is provided between the fixing plate and the pressure plate. The spring is sleeved on the rod of the electric telescopic rod, and the two ends of the spring are respectively connected to the fixing plate and the pressure plate.

5. The laser dotting apparatus for a light guide plate according to claim 4, wherein: The fixed plate is threadedly connected to the electric telescopic rod.

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