Bubble discharging device for light guide plate

Abstract

The utility model relates to the technical field of light guide plate bubble removal, in particular to a light guide plate bubble removal device, which adopts a rack and a driving cylinder, a hot pressing jig is arranged between the rack and the driving cylinder, the hot pressing jig comprises a base, a lower template, a fixed seat, a heating plate and an upper template, and a plurality of first pressing rings which are arranged at intervals protrude from the bottom of the upper template. A plurality of second pressing rings which are arranged at intervals and are in one-to-one correspondence with the first pressing rings convexly extend from the top of the lower template; during use, the heating plate supplies heat to the upper die plate, the whole film-pasted light guide plate is placed on the lower die plate, then the driving air cylinder drives the fixing base to drive the lower die plate to press downwards, the first pressing ring and the second pressing ring are matched to press a peripheral light emitting area of the light guide plate, and bubbles between the periphery of the light guide plate and a reflecting film are discharged under the hot pressing effect. Dark spots caused by the influence of bubbles on the peripheral light-emitting area of the light guide plate during light emitting are avoided, and the peripheral light-emitting effect of the film light guide plate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to light guide plate exhaust bubble technical field, concretely relates to a light guide plate exhaust bubble device. BACKGROUND

[0002] The light guide plate is mainly made of optical grade acrylic (PMMA) or PC plate material. These materials have the characteristics of high transparency, high refractive index and no light absorption. Through precise laser engraving, V-shaped cross grid engraving or UV screen printing technology, light guide points are formed on the bottom surface of the plate. These light guide points can guide the propagation of light inside the plate and uniformly diffuse it to the plate surface when needed.

[0003] To make the light guide plate peripheral light, one side of the light guide plate needs to be attached to a reflective film, and the other side needs to be attached to a light shielding film that does not cover the outer periphery of the light guide plate, forming a film-attached light guide plate. The outer periphery of the film-attached light guide plate reflects light through the reflective film, and the film-attached light guide plate is usually produced in whole plates. However, after the light guide plate is attached to the reflective film, there are a large number of micro-bubbles between the light guide plate and the reflective film, which causes a large number of dark spots in the light-emitting area of the outer periphery of the film-attached light guide plate, adversely affecting the light-emitting effect of the outer periphery of the film-attached light guide plate. SUMMARY

[0004] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the utility model is to provide a light guide plate exhaust bubble device.

[0005] The utility model discloses a light guide plate exhaust bubble device, including frame, set up in the driving cylinder of frame top, be provided with hot pressing jig between frame and driving cylinder, hot pressing jig includes the base connected in frame, with the bottom of lower mould plate of top connection, the fixed seat connected in the output of driving cylinder, with the bottom of heating plate of fixed seat connection, and with the bottom of upper mould plate of heating plate connection, the bottom of upper mould plate protrudes a plurality of interval first pressure ring of setting, the top of lower mould plate protrudes a plurality of interval and with first pressure ring one-to-one corresponding second pressure ring, first pressure ring and second pressure ring cooperate for the outer periphery light-emitting area of pressing together light guide plate.

[0006] Preferably, the hot pressing jig further comprises at least two guide rods fixedly connected to the base, and a linear bearing in sliding fit with the guide rods, the heating plate is provided with a fixed hole corresponding to the linear bearing, and the linear bearing is fixedly arranged in the fixed hole.

[0007] Preferably, the lower mould plate is provided with a plurality of first positioning holes, and the base is fixedly connected with a first positioning column in positioning fit with the first positioning holes; the first positioning column penetrates through the first positioning hole, and the height of the first positioning column protruding out of the base is higher than the depth of the second pressure ring and lower than the sum of the depths of the first pressure ring and the second pressure ring.

[0008] Preferably, the upper die plate is provided with at least two second positioning through holes and a plurality of mounting holes, the heating plate is fixedly connected with a second positioning column in positioning cooperation with the second positioning through holes, and the upper die plate is provided with a first bolt penetrating through the mounting hole and in threaded cooperation with the heating plate.

[0009] Preferably, the base is provided with an elongated countersunk hole, and the base is provided with a second bolt penetrating through the elongated countersunk hole and in threaded cooperation with the rack.

[0010] The light guide plate exhaust bubble device has the advantages that the heating plate supplies heat for the upper die plate, the whole plate of the film-coated light guide plate is placed on the lower die plate, the fixed seat is driven by the driving cylinder to drive the lower die plate to press downward, the first pressing ring and the second pressing ring are matched to press the outer light-emitting area of the light guide plate, the bubbles between the outer periphery of the light guide plate and the reflecting film can be exhausted under the action of heat pressing, the outer light-emitting area of the light guide plate is prevented from being affected by the bubbles to cause dark spots during light emission, and the light emission effect of the outer periphery of the film-coated light guide plate is improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Fig. 1 is a structural schematic view of the heat pressing jig of the utility model;

[0012] Fig. 2 is an exploded schematic view of the heat pressing jig of the utility model;

[0013] Fig. 3 is a structural schematic view of another view of the heat pressing jig of the utility model;

[0014] The signs are: 1, base; 2, lower die plate; 3, fixed seat; 4, heating plate; 5, upper die plate; 6, first pressing ring; 7, second pressing ring; 8, guide rod; 9, linear bearing; 10, fixed through hole; 11, first positioning through hole; 12, first positioning column; 13, second positioning through hole; 14, mounting hole; 15, second positioning column; 16, first bolt; 17, elongated countersunk hole. DETAILED DESCRIPTION

[0015] In order to facilitate the understanding of those skilled in the art, the utility model is further described below in combination with examples and drawings, and the content mentioned in the implementation manner is not a limitation on the utility model.

[0016] As Figs. 1-3 shown, a light guide plate bubble exhaust device, comprising a rack (not shown in the figure), a driving cylinder (not shown in the figure) arranged on the top of the rack, a hot-pressing jig arranged between the rack and the driving cylinder, the hot-pressing jig comprising a base 1 connected to the rack, a lower die plate 2 connected to the top of the base 1, a fixed seat 3 connected to the output end of the driving cylinder, a heating plate 4 connected to the bottom of the fixed seat 3, and an upper die plate 5 connected to the bottom of the heating plate 4, the bottom of the upper die plate 5 protrudes a plurality of first pressing rings 6 arranged at intervals, the top of the lower die plate 2 protrudes a plurality of second pressing rings 7 arranged at intervals and corresponding to the first pressing rings 6, the first pressing rings 6 and the second pressing rings 7 cooperate to press the outer peripheral light emitting area of the light guide plate.

[0017] The light guide plate bubble exhaust device adopts a rack, a driving cylinder arranged on the top of the rack, and a hot-pressing jig arranged between the rack and the driving cylinder. The hot-pressing jig comprises a base 1 connected to the rack, a lower die plate 2 connected to the top of the base 1, a fixed seat 3 connected to the output end of the driving cylinder, a heating plate 4 connected to the bottom of the fixed seat 3, and an upper die plate 5 connected to the bottom of the heating plate 4. The bottom of the upper die plate 5 protrudes a plurality of first pressing rings 6 arranged at intervals, and the top of the lower die plate 2 protrudes a plurality of second pressing rings 7 arranged at intervals and corresponding to the first pressing rings 6. In use, the heating plate 4 provides heat for the upper die plate 5, the whole batch of film-coated light guide plates are placed on the lower die plate 2, and then the driving cylinder drives the fixed seat 3 to press down the lower die plate 2, so that the first pressing rings 6 and the second pressing rings 7 cooperate to press the outer peripheral light emitting area of the light guide plate. Under the action of hot pressing, the bubbles between the outer periphery of the light guide plate and the reflective film can be exhausted, avoiding the influence of bubbles on the outer peripheral light emitting area of the light guide plate, resulting in dark spots when emitting light, and improving the light emitting effect of the outer periphery of the film-coated light guide plate.

[0018] Further, the hot-pressing jig further comprises at least two guide rods 8 fixedly connected to the base 1, and linear bearings 9 in one-to-one sliding cooperation with the guide rods 8. The heating plate 4 is provided with fixed through holes 10 corresponding to the linear bearings 9, and the linear bearings 9 are fixedly arranged in the fixed through holes 10, which is beneficial to improve the pressing stability of the heating plate 4 and the upper die plate 5, and avoid the ectopic of the heating plate 4 driven by the driving cylinder to drive the fixed seat 3, which affects the bubble exhaust effect of the outer peripheral light emitting area of the light guide plate.

[0019] Further, the lower mold plate 2 is provided with a plurality of first positioning through holes 11, and the base 1 is fixedly connected with first positioning columns 12 in positioning cooperation with the first positioning through holes 11; the first positioning columns 12 penetrate through the first positioning through holes 11, and the height of the first positioning columns 12 protruding out of the base 1 is higher than the depth of the second compression ring 7 and lower than the sum of the depths of the first compression ring 6 and the second compression ring 7; on the one hand, the lower mold plate 2 can be quickly installed on the base 1, and on the other hand, in the actual production process, the whole-plate production of the film-laminated light guide plate has a fool-proof through hole corresponding to the outer peripheral light-exit area of the light guide plate and the second compression ring 7 of the lower mold plate 2, and the first positioning columns 12 are beneficial to the quick positioning of the whole-plate film-laminated light guide plate on the lower mold plate 2 by means of the fool-proof through hole of the whole-plate film-laminated light guide plate. In addition, the height of the first positioning columns 12 protruding out of the base 1 is limited, which is beneficial to avoiding the obstruction of the first compression ring 6 and the second compression ring 7 to the compression of the light guide plate.

[0020] Further, the upper mold plate 5 is provided with at least two second positioning through holes 13 and a plurality of mounting holes 14, the heating plate 4 is fixedly connected with second positioning columns 15 in positioning cooperation with the second positioning through holes 13, and the upper mold plate 5 is provided with first bolts 16 penetrating through the mounting holes 14 and in threaded cooperation with the heating plate 4, so that the upper mold plate 5 can be quickly positioned on the heating plate 4 of the base 1, and then the first bolts 16 are used to fix the upper mold plate 5 on the heating plate 4.

[0021] Further, the base 1 is provided with long strip countersunk holes 17, and the base 1 is provided with second bolts (not shown in the figure) penetrating through the long strip countersunk holes 17 and in threaded cooperation with the rack.

[0022] The above embodiment is a preferred implementation scheme of the present application, and in addition to this, the present application can be implemented in other ways, and any obvious replacement without departing from the concept of the present application is within the protection scope of the present application.

Claims

1. A light guide plate bubble removal device, comprising a frame and a drive cylinder disposed on the top of the frame, characterized in that: A hot pressing fixture is provided between the frame and the drive cylinder. The hot pressing fixture includes a base connected to the frame, a lower template connected to the top of the base, a fixed seat connected to the output end of the drive cylinder, a heating plate connected to the bottom of the fixed seat, and an upper template connected to the bottom of the heating plate. The bottom of the upper template has a plurality of spaced first pressure rings protruding from it, and the top of the lower template has a plurality of spaced second pressure rings that correspond one-to-one with the first pressure rings. The first and second pressure rings cooperate to press the outer light-emitting area of ​​the light guide plate.

2. The light guide plate bubble removal device according to claim 1, characterized in that: The hot press fixture also includes at least two guide rods fixedly connected to the base, and linear bearings that slide with each guide rod. The heating plate has fixed through holes corresponding to the linear bearings, and the linear bearings are fixedly installed in the fixed through holes.

3. The light guide plate bubble removal device according to claim 1, characterized in that: The lower template has multiple first positioning through holes, and the base is fixedly connected with a first positioning post that is positioned and engaged with each of the first positioning through holes; the first positioning post passes through the first positioning through hole, and the height of the first positioning post protruding from the base is higher than the depth of the second pressure ring and lower than the sum of the depths of the first pressure ring and the second pressure ring.

4. The light guide plate bubble removal device according to claim 1, characterized in that: The upper template has at least two second positioning through holes and multiple mounting holes. The heating plate is fixedly connected with a second positioning post that is positioned and matched with the second positioning through holes. The upper template is provided with a first bolt that passes through the mounting hole and is threadedly matched with the heating plate.

5. The light guide plate bubble removal device according to claim 1, characterized in that: The base has an elongated countersunk hole, and the base is provided with a second bolt that passes through the elongated countersunk hole and is threaded into the frame.

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