OCA optical cement laminating equipment for display screen and laminating method of OCA optical cement laminating equipment

Abstract

The invention discloses OCA optical cement laminating equipment for a display screen and a laminating method thereof.The OCA optical cement laminating equipment comprises a working box and a laminating frame arranged at the top of the working box, a pressing plate driving assembly is fixedly installed on the laminating frame, and a rolling assembly is arranged at the bottom of the pressing plate driving assembly; the invention relates to the technical field of optical cement lamination. According to the OCA optical cement laminating equipment for the display screen and the laminating method of the OCA optical cement laminating equipment, through cooperation of a height adjusting assembly and a working groove, circumferential and height limiting is carried out on a display module to be laminated and cover plate glass to be laminated, in cooperation with arrangement of a rolling assembly, a first balance weight rotating shaft drives a rolling sleeve to carry out rolling of a partial area, and then a second balance weight rotating shaft drives a second rolling sleeve to carry out rolling of the partial area; and then the other rolling sleeve is driven by the second balance weight rotating shaft to roll the remaining part, the two rolling areas are partially overlapped, the rolling blind area is avoided, after rolling is finished, pressing is directly conducted through the pressing plate, and the attaching quality between the display mold and the cover plate glass is effectively guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of optical adhesive bonding, in particular to an OCA optical adhesive bonding device for display screens and a bonding method thereof. BACKGROUND

[0002] OCA optical adhesive is a special double-sided adhesive with optical transparency, used for bonding transparent optical elements. It has the characteristics of colorless transparency, light transmittance above 90%, good bonding strength, room temperature or medium temperature curing, and small curing shrinkage.

[0003] Display screen bonding processes mainly include hard-to-hard and soft-to-hard based on the characteristics of bonding materials, and the core difference lies in the material hardness of the bonding object and the process adaptation scene. Hard-to-hard refers to the process of directly bonding two hard materials such as glass substrates and display screen modules through optical adhesive.

[0004] In the display screen bonding process, in order to ensure the bonding quality, it is usually necessary to first roll to remove bubbles, and then to finally press, such as the OCA optical adhesive bonding device for an electronic paper ink screen and the bonding method thereof described in application No. 202410227188.7. The rolling roller and the pressing plate are cooperated to make the pressing plate descend while the rolling can be started at the same time, and after the initial rolling is completed, the pressing process is performed, and there is no interval time between the two, and after the pressing is completed, the secondary rolling process can be automatically performed. The whole process is automatically completed, which can effectively avoid the problem of long interval time between traditional devices for rolling and pressing, thereby improving the bonding quality and shortening the bonding time. However, although the rolling technology is used to eliminate bubbles, the rolling roller cannot cover the bonding surface comprehensively, there is a rolling blind area between the two rolling rollers, and there is a lack of limiting structure, which cannot guarantee the stability of the display screen structure during the rolling process, and the display screen structure is directly rolled after the optical adhesive is applied, which is easy to cause the offset of the bonding part, affecting the bonding quality.

[0005] Therefore, an OCA optical adhesive bonding device for display screens and a bonding method thereof are provided, which realizes high-quality and convenient bonding of display screen optical adhesive in a pre-bonding extrusion, staggered reverse rolling and final pressing manner. SUMMARY

[0006] In view of the deficiencies of the prior art, the present application provides an OCA optical adhesive bonding device for display screens and a bonding method thereof, which solves the problems of existing display screen bonding processes, such as the existence of rolling blind area, the lack of limiting structure, the inability to guarantee the stability of the display screen structure during the rolling process, and the easy occurrence of the offset of the bonding part after the optical adhesive is applied, affecting the bonding quality.

[0007] In order to achieve the above object, the present application is realized by the following technical scheme: An OCA optical adhesive bonding device for display screen, comprising a working box and a bonding frame arranged on the top of the working box, a pressing plate driving assembly is fixedly installed on the bonding frame, a roller pressing assembly is arranged at the bottom of the pressing plate driving assembly, a height adjusting assembly is arranged at the top of the inner cavity of the working box, and a working groove matched with the height adjusting assembly is formed in the top of the working box.

[0008] In order to realize the pressing drive of optical adhesive bonding, the present application is further provided that: the pressing plate driving assembly comprises a telescopic cylinder, a push plate is fixedly installed at the telescopic end of the telescopic cylinder, a plurality of positioning rods are slidably installed through the top of the push plate, a pressing plate is fixedly installed at the bottom end of the plurality of positioning rods, and a limiting plate is fixedly installed at the top end of the plurality of positioning rods, a spring one is sleeved on the outer periphery of the positioning rod, and the two ends of the spring one are in contact with the opposite sides of the push plate and the pressing plate.

[0009] The present application is further provided that: the bonding frame comprises a top plate and three vertical rods, the three vertical rods are fixedly installed at the bottom of the top plate, the telescopic cylinder is fixedly installed at the top of the top plate, and an opening matched with the telescopic end of the telescopic cylinder is formed in the top of the top plate, and the push plate is sleeved and slidably installed on the outer periphery of the three vertical rods. The three vertical rods are fixedly installed at the top of the working box.

[0010] In order to eliminate the roller pressing blind area, the present application is further provided that: the roller pressing assembly comprises a counterweight shaft one and a counterweight shaft two, a roller pressing sleeve is sleeved and fixedly installed on the outer periphery of the counterweight shaft one and the counterweight shaft two, a connecting plate one is rotatably installed on the outer periphery of the two ends of the counterweight shaft one, and one end of the two connecting plates one is rotatably installed on the left side of the bottom of the push plate through a rotating block one; a connecting plate two is rotatably installed on the outer periphery of the two ends of the counterweight shaft two, and one end of the two connecting plates two is rotatably installed on the right side of the bottom of the push plate through a rotating block two; Two groups of magnetic adsorption seats one are fixedly installed on the left side of the bottom of the push plate, the magnetic adsorption seat one is adsorbed and matched with the counterweight shaft two, a magnetic adsorption seat two is fixedly installed on the right side of the bottom of the push plate, and the magnetic adsorption seat two is adsorbed and matched with the counterweight shaft one; One end of the connecting plate one is fixedly installed with an inclined rotating limiting block one matched with the rotating block one, and one end of the connecting plate two is fixedly installed with an inclined rotating limiting block two matched with the push plate.

[0011] In order to realize convenient storage and convenient expansion of the rolling sleeve, the application further provides that the top plate is provided with a functional plate on both sides at the bottom and fixedly installed through a bolt and a nut, the bottom of the functional plate is fixedly installed with a plug-in plate, the top of the magnetic force adsorption seat one and the magnetic force adsorption seat two is provided with a through groove, and the bottom end of the plug-in plate penetrates through the push plate and extends into the through groove.

[0012] In order to guarantee the stability of the relative position between the fitting components, the application further provides that the top of the working box is provided with a pre-fitting assembly, the pre-fitting assembly comprises four single-head driving toothed plates and two fitting plates, the front and rear sides of the bottom of the fitting plate are fixedly installed with a sector gear, the front and rear sides of the top of the working box are provided with an installation groove, the two sector gears on one fitting plate are rotatably installed in the two installation grooves on the same side, the four single-head driving toothed plates pass through one installation groove and are in meshing cooperation with the sector gear, and the top end of the four single-head driving toothed plates is fixedly connected with the bottom of the push plate. The left and right sides of the top of the working box are fixedly installed with a magnetic force adsorption plate, the surface of the two fitting plates is embedded with an iron sheet used in cooperation with the magnetic force adsorption plate, and the two sides of the top of the push plate are provided with a T-shaped groove used in cooperation with the magnetic force adsorption plate and the fitting plate.

[0013] In order to guarantee the rolling quality, the application further provides that the height adjusting assembly comprises a U-shaped frame and an adjusting plate, the top of the adjusting plate is fixedly installed with a convex plate, the bottom of the adjusting plate is fixedly installed with an isosceles triangle plate, the front surface of the U-shaped frame is rotatably installed with a bidirectional screw rod penetrating through the front surface, the front end of the bidirectional screw rod is fixedly installed with a knob, the outer periphery of the bidirectional screw rod is sleeved and threadedly installed with two push blocks, the top of the push block is fixedly installed with a right-angled trapezoidal plate, and the inclined surfaces of the two right-angled trapezoidal plates are in sliding cooperation with the two inclined surfaces of the isosceles triangle plate. The U-shaped frame is fixedly installed at the top of the inner cavity of the working box through a bolt, and the convex plate is arranged in the inner cavity of the working groove.

[0014] The application further provides that the four corners of the top of the adjusting plate are penetrated and slidably installed with an auxiliary rod, the four auxiliary rods are fixedly installed at the top of the inner cavity of the working box, the outer periphery of the auxiliary rod is sleeved with a spring two, and the two ends of the spring two are in contact with the top of the inner cavity of the working box and the top of the adjusting plate respectively.

[0015] The application provides an OCA optical adhesive fitting device for a display screen and a fitting method thereof. (1) The application limits the circumference and height of the display module and the cover plate glass to be attached through the cooperation of the height adjusting assembly and the working groove, and cooperates with the setting of the roller pressing assembly, first drives one roller pressing sleeve to press the partial area through the counterweight rotating shaft one, then drives the other roller pressing sleeve to press the remaining part through the counterweight rotating shaft two, the two roller pressing areas have partial overlap, avoiding the emergence of the roller pressing blind area, after the roller pressing is completed, directly press through the pressing plate, effectively guaranteeing the attachment quality between the display mold and the cover plate glass.

[0016] (2) The application stores and positions the two roller pressing sleeves that have completed the roller pressing through the cooperation of the magnetic adsorption seat one and the magnetic adsorption seat two, facilitates the taking and placing of the display screen structure to be attached in the working groove, sets the distance by controlling the retraction of the telescopic cylinder, makes the plugboard resist the roller pressing sleeve to realize the automatic downward inclination of the roller pressing sleeve, so as to facilitate the roller pressing operation, and can also cooperate with the pre-attachment assembly to pre-press the cover plate glass, so as to guarantee the preliminary attachment strength between the cover plate glass and the optical mold, and avoid the deviation in the roller pressing process.

[0017] (3) The application adjusts the effective depth of the working groove through the height adjusting assembly, so as to adapt to the attachment work of display screen optical glue of different thicknesses, and has the advantages of simple structure and convenient adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an external structure schematic diagram of the equipment in the initial state in the application; Figure 2 It is a structure connection schematic diagram of the working tank and the height adjusting assembly when the equipment is in the initial state in the application; Figure 3 It is a structure connection schematic diagram of the attachment frame, the pressing plate driving assembly, the magnetic adsorption seat one and the magnetic adsorption seat two in the application; Figure 4 It is an external structure schematic diagram of the equipment after completing the pre-pressing treatment in the embodiment of the application; Figure 5 It is a structure connection schematic diagram of the expanded roller pressing assembly and the single-head driving gear plate in the application; Figure 6 It is a structure schematic diagram of the expanded roller pressing assembly and the pressing plate in the application; Figure 7 It is a structure schematic diagram of the stored roller pressing assembly and the pressing plate in the application; Figure 8 It is a structure schematic diagram of the working tank and the pre-attachment assembly when the pre-pressing treatment in the embodiment of the application; Figure 9 It is a structure connection schematic diagram of the attachment plate, the sector gear and the iron sheet in the application; Figure 10The structure diagram of the height adjusting assembly of the application after being disassembled; Figure 11 The connection diagram of the U-shaped frame, bidirectional screw rod, knob, push block and right-angled trapezoidal plate structure in the application.

[0019] In the figure: 1, work tank; 101, work groove; 102, mounting groove; 2, fitting frame; 201, top plate; 202, vertical rod; 3, pressing plate driving assembly; 301, telescopic cylinder; 302, push plate; 303, positioning rod; 304, pressing plate; 305, limiting plate; 306, spring one; 307, T-shaped groove; 4, roller pressing assembly; 401, counterweight rotating shaft one; 402, counterweight rotating shaft two; 403, roller pressing sleeve; 404, connecting plate one; 405, rotating block one; 406, connecting plate two; 407, rotating block two; 408, magnetic adsorption seat one; 409, magnetic adsorption seat two; 4010, inclined rotating limiting block one; 4011, functional plate; 4012, plug-in plate; 4013, through groove; 4014, inclined rotating limiting block two; 5, height adjusting assembly; 501, U-shaped frame; 502, adjusting plate; 503, convex plate; 504, isosceles triangle plate; 505, bidirectional screw rod; 506, knob; 507, push block; 508, right-angled trapezoidal plate; 509, auxiliary rod; 5010, spring two; 6, pre-fitting assembly; 601, single-head driving toothed plate; 602, fitting plate; 603, fan-shaped gear; 604, magnetic adsorption plate; 605, iron sheet. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the application.

[0021] Please refer to Figures 1-11The embodiment of the first aspect of the present application provides the following technical scheme: an OCA optical adhesive bonding device for a display screen, comprising a working box 1 and a bonding frame 2 arranged on the top of the working box 1, a pressing plate driving assembly 3 is fixedly installed on the bonding frame 2, the pressing plate driving assembly 3 is used for driving the pressing plate 304 to descend, so as to press the display module and the cover plate glass, a roller pressing assembly 4 is arranged at the bottom of the pressing plate driving assembly 3, the pressing plate driving assembly 3 is used for driving the roller pressing assembly 4 to stagger and reversely roll the display module and the cover plate glass to be bonded during the descending process, so as to realize overall rolling, a height adjusting assembly 5 is arranged at the top of the inner cavity of the working box 1, a working groove 101 is arranged at the top of the working box 1 and is used in cooperation with the height adjusting assembly 5, the working groove 101 is used for circumferentially limiting the display module and the cover plate glass to be bonded, and the height adjusting assembly 5 is used for limiting the bottom of the display module and the cover plate glass to be bonded in the vertical direction, a pre-bonding assembly 6 is arranged at the top of the working box 1, and the pre-bonding assembly 6 is used for pre-pressing the display module and the cover plate glass before rolling.

[0022] In an exemplary embodiment, the bonding frame 2 comprises a top plate 201 and three vertical rods 202, the three vertical rods 202 are fixedly installed at the bottom of the top plate 201, and the three vertical rods 202 are fixedly installed at the top of the working box 1, the pressing plate driving assembly 3 comprises a telescopic cylinder 301, the telescopic cylinder 301 is electrically connected with an external power supply and is controlled through a control switch, the telescopic cylinder 301 is fixedly installed at the top of the top plate 201, the telescopic end of the telescopic cylinder 301 penetrates through the top plate 201 and is fixedly installed with a push plate 302, an opening is arranged at the top of the top plate 201 and is used in cooperation with the telescopic end of the telescopic cylinder 301, the push plate 302 is sleeved and slidingly installed on the outer periphery of the three vertical rods 202, a plurality of positioning rods 303 are penetratingly and slidingly installed at the top of the push plate 302, the bottom ends of the plurality of positioning rods 303 are fixedly installed with the pressing plate 304, and the top ends of the plurality of positioning rods 303 are fixedly installed with limiting plates 305, the outer periphery of the positioning rod 303 is sleeved with a spring one 306, and the two ends of the spring one 306 are in contact with the opposite sides of the push plate 302 and the pressing plate 304 respectively.

[0023] Therefore, the spring one 306 is used for elastically limiting the pressing plate 304, the telescopic cylinder 301 is elongated, the push plate 302 drives the pressing plate 304 to press the cover plate glass, and the elastic extrusion force provided by the spring one 306 ensures the effective bonding of the display module and the cover plate glass.

[0024] In an exemplary embodiment, the roller assembly 4 comprises a counterweight rotating shaft 401 and a counterweight rotating shaft 402, both of which are made of iron metal to facilitate the adsorption and fixation of the following magnetic adsorption seat 408 and magnetic adsorption seat 409. The outer periphery of the counterweight rotating shaft 401 and the counterweight rotating shaft 402 is sleeved and fixedly installed with a roller sleeve 403. The outer periphery of both ends of the counterweight rotating shaft 401 is sleeved and rotatably installed with a connecting plate 404. One end of both connecting plates 404 is rotatably installed on the left side of the bottom of the push plate 302 through a rotating block 405. The outer periphery of both ends of the counterweight rotating shaft 402 is sleeved and rotatably installed with a connecting plate 406. One end of both connecting plates 406 is rotatably installed on the right side of the bottom of the push plate 302 through a rotating block 407. Two groups of magnetic adsorption seats 408 are fixedly installed on the left side of the bottom of the push plate 302. The magnetic adsorption seat 408 is adsorbed with the counterweight rotating shaft 402. The magnetic adsorption seat 409 is fixedly installed on the right side of the bottom of the push plate 302. The magnetic adsorption seat 409 is adsorbed with the counterweight rotating shaft 401. One end of the connecting plate 404 is fixedly installed with an inclined rotating limiting block 4010 which is used in cooperation with the rotating block 405. One end of the connecting plate 406 is fixedly installed with an inclined rotating limiting block 4014 which is used in cooperation with the push plate 302.

[0025] It should be noted that the gravity of the counterweight rotating shaft 401 and the counterweight rotating shaft 402 ensures that they can rotate around the rotating block 405 and the rotating block 407 respectively, and the maximum downward rotation angle is limited by the inclined rotating limiting block 4010 and the inclined rotating limiting block 4014. When the counterweight rotating shaft 401 and the counterweight rotating shaft 402 rotate downward to the maximum inclination angle, as shown in Figure 6 The staggered roller pressing mode of the two roller sleeves 403 is that the counterweight rotating shaft 401 drives one roller sleeve 403 to first contact the cover plate glass and then press to the right. After the counterweight rotating shaft 401 moves to the right side of the counterweight rotating shaft 402, the counterweight rotating shaft 402 drives the other roller sleeve 403 to contact the cover plate glass and then move to the left. In this process, the roller pressing areas of the two roller sleeves 403 overlap. After the two roller sleeves 403 are separated from the cover plate glass, the overall roller pressing of the cover plate glass is completed. After the counterweight rotating shaft 401 and the counterweight rotating shaft 402 move to the magnetic adsorption seat 408 and the magnetic adsorption seat 409 respectively, the counterweight rotating shaft 401 and the counterweight rotating shaft 402 are adsorbed and fixed by the magnetic adsorption seat 409 and the magnetic adsorption seat 408 respectively, as shown in Figure 7 At this time, the roller assembly 4 is completed. The storage of the roller assembly 4 provides a convenient operation space for the display module and the cover plate glass in the work groove 101.

[0026] Further, the pressing plate 304 is in contact with the cover plate glass after the two roller sleeves 403 are separated from the cover plate glass, and the elastic pressing is performed.

[0027] Furthermore, the functional plates 4011 are fixedly installed on the two sides of the bottom of the top plate 201 through bolts and nuts, the plug plates 4012 are fixedly installed on the bottom of the functional plates 4011, the top of the magnetic adsorption seat one 408 and the magnetic adsorption seat two 409 are provided with the through grooves 4013, and the bottom end of the plug plate 4012 penetrates through the push plate 302 and extends into the through grooves 4013. Thus, before the push plate 302 is driven to descend and perform the pressing operation under the extension of the telescopic cylinder 301, the telescopic cylinder 301 is controlled to shrink by a set distance, the separation of the two roller sleeves 403 from the magnetic adsorption seat one 408 and the magnetic adsorption seat two 409 is realized, and the unfolding of the roller pressing assembly 4 is facilitated.

[0028] In an exemplary embodiment, the top of the working box 1 is provided with a pre-bonding assembly 6, the pre-bonding assembly 6 includes four single-head driving toothed plates 601 and two bonding plates 602, the front and rear sides of the bottom of each bonding plate 602 are fixedly installed with a sector gear 603, the front and rear sides of the two sides of the top of the working box 1 are provided with installation grooves 102, the two sector gears 603 on one bonding plate 602 are rotatably installed in the two installation grooves 102 on the same side, the four single-head driving toothed plates 601 penetrate through one installation groove 102 and are in meshing cooperation with the sector gear 603, and the top end of each single-head driving toothed plate 601 is fixedly connected with the bottom of the push plate 302. The left and right sides of the top of the working box 1 are fixedly installed with magnetic adsorption plates 604, the magnetic adsorption plates 604 are vertical plates with fixed magnets embedded therein, the surfaces of the two bonding plates 602 are embedded with iron sheets 605 for cooperation with the magnetic adsorption plates 604, and the two sides of the top of the push plate 302 are provided with T-shaped grooves 307 for cooperation with the magnetic adsorption plates 604 and the bonding plates 602.

[0029] In this embodiment, the four single-head driving toothed plates 601 are fixed with the push plate 302 and are driven to rotate by the push plate 302, before the push plate 302 is driven to descend and perform the pressing operation under the extension of the telescopic cylinder 301, the telescopic cylinder 301 is controlled to shrink by a set distance, the single-head driving toothed plates 601 drive the sector gears 603 to rotate, the sector gears 603 drive the bonding plates 602 to perform the pre-pressing operation on the optical module and the cover plate glass in the working groove 101, the misalignment of the optical module and the cover plate glass during the subsequent roller pressing is avoided, and when the telescopic cylinder 301 is subsequently driven to extend, the bonding plates 602 are separated from the cover plate glass and are adsorbed and reset by the magnetic adsorption plates 604, so as to provide the operation space for the roller pressing.

[0030] Therefore, when the optical module and the cover plate glass are bonded, the pre-bonding process is first performed, then the overall rolling is performed through the two rolling sleeves 403, and finally the final bonding is performed by the pressing plate 304. Through the operation, effective hardware support is provided for the high-quality bonding of the optical glue in the optical module and the cover plate glass.

[0031] In an exemplary embodiment, the height adjusting assembly 5 comprises a U-shaped frame 501 and an adjusting plate 502, the U-shaped frame 501 is fixedly installed on the top of the inner cavity of the working box 1 by bolts, the top of the adjusting plate 502 is fixedly installed with a convex plate 503, the convex plate 503 is arranged in the inner part of the working groove 101, the bottom of the adjusting plate 502 is fixedly installed with an isosceles triangular plate 504, the front surface of the U-shaped frame 501 is rotatably installed with a bidirectional screw rod 505, the bidirectional screw rod 505 is a screw rod with opposite direction threads on the surface, the front end of the bidirectional screw rod 505 is fixedly installed with a knob 506, the outer periphery of the bidirectional screw rod 505 is sleeved and threadedly installed with two push blocks 507, the top of the push block 507 is fixedly installed with a right-angled trapezoidal plate 508, the inclined surfaces of the two right-angled trapezoidal plates 508 are slidably matched with the two inclined surfaces of the isosceles triangular plate 504 respectively; the four corners of the top of the adjusting plate 502 are slidably installed with auxiliary rods 509, the four auxiliary rods 509 are fixedly installed on the top of the inner cavity of the working box 1, the outer periphery of the auxiliary rod 509 is sleeved with a spring 2 510, and the two ends of the spring 2 510 are in contact with the top of the inner cavity of the working box 1 and the top of the adjusting plate 502 respectively.

[0032] Therefore, the height of the adjusting plate 502 can be adjusted by rotating the knob 506, and then the height of the convex plate 503 in the working groove 101 is adjusted to match the display module and the cover plate glass combination of different thicknesses.

[0033] The second aspect embodiment of the present application provides a bonding method of the OCA optical glue bonding equipment for display screens, which is applied to the OCA optical glue bonding equipment for display screens and comprises the following steps: S1, in the vacuum chamber, the target thickness of the display module and the cover glass is obtained, the height difference between the top horizontal surface of the convex plate 503 and the top horizontal surface of the working box 1 is adjusted, that is, the knob 506 is rotated to drive the bidirectional screw rod 505 to rotate, the two push blocks 507 are moved closer to or farther away from each other, the push block 507 drives the right-angled trapezoidal plate 508 to move, the isosceles triangular plate 504 pushes the adjusting plate 502 to drive the convex plate 503 to rise; in the process of moving the two push blocks 507 away from each other, the push block 507 drives the right-angled trapezoidal plate 508 to move, the spring 5010 pushes the adjusting plate 502 to drive the convex plate 503 to descend, and the height difference between the top horizontal surface of the convex plate 503 and the top horizontal surface of the working box 1 reaches the target thickness, and the adjustment is completed. After the display module to be attached is placed in the working groove 101, the optical adhesive is applied, and the cover glass is attached again; S2, control the telescopic cylinder 301 to contract by a set distance, the telescopic cylinder 301 drives the push plate 302 to rise, the push plate 302 drives the sector gear 603 to rotate by one quarter of a circle through the single-head driving toothed plate 601, the sector gear 603 drives the attachment plate 602 to rotate, and the cover glass is pre-pressed, as shown in Figure 8 ; In the process, the push plate 302 drives the magnetic adsorption seat one 408 and the magnetic adsorption seat two 409 to rise, and the two roller pressing sleeves 403 are separated from the magnetic adsorption seat one 408 and the magnetic adsorption seat two 409 respectively under the resistance and limiting of the inserted plate 4012. The counterweight rotating shaft one 401 drives one roller pressing sleeve 403 to rotate downward until it is limited by the inclined rotating limiting block one 4010 and stops rotating. The counterweight rotating shaft two 402 drives the other roller pressing sleeve 403 to rotate downward until it is limited by the inclined rotating limiting block two 4014 and stops rotating, as shown in Figure 5 and Figure 6 ; S3, control the telescopic cylinder 301 to extend, the telescopic cylinder 301 drives the push plate 302 to descend, the push plate 302 drives the sector gear 603 to reverse through the single-head driving toothed plate 601, so that the attachment plate 602 is separated from the cover glass. When the single-head driving toothed plate 601 continues to move downward and is about to be separated from the sector gear 603, the magnetic adsorption plate 604 keeps the attachment plate 602 vertical through the adsorption iron sheet 605, as shown in Figure 4 ; S4, as the telescopic cylinder 301 continues to extend, the roller pressing sleeve 403 on the counterweight rotating shaft one 401 first contacts the cover glass and then rolls the cover glass to the right. After the counterweight rotating shaft one 401 moves to the right side of the counterweight rotating shaft two 402, as the telescopic cylinder 301 continues to extend, the roller pressing sleeve 403 on the counterweight rotating shaft two 402 contacts the cover glass and then rolls the cover glass to the left; S5, with the continued extension of the telescopic cylinder 301, the two roller sleeves 403 are both separated from the cover glass, the pressing plate 304 is in contact with the cover glass and compresses the spring 306, until the two roller sleeves 403 are respectively moved to the magnetic adsorption seat one 408 and the magnetic adsorption seat two 409, the extension of the telescopic cylinder 301 is stopped, at this time the magnetic adsorption seat one 408 adsorbs the counterweight rotating shaft two 402, the magnetic adsorption seat two 409 adsorbs the counterweight rotating shaft one 401, as shown in Figure 7 ; S6, after the optical glue is pasted, the telescopic cylinder 301 is controlled to be retracted and reset, the display module and the cover glass which are completed are taken out from the working groove 101.

[0034] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An OCA optical adhesive bonding device for display screens, comprising a working box (1) and a bonding frame (2) arranged on the top of the working box (1), characterized in that, The fitting frame (2) is fixedly installed with a pressing plate driving assembly (3), the bottom of the pressing plate driving assembly (3) is provided with a roller pressing assembly (4), the top of the inner cavity of the working box (1) is provided with a height adjusting assembly (5), and the top of the working box (1) is provided with a working groove (101) matched with the height adjusting assembly (5). 2.The OCA optical adhesive bonding device for a display screen according to claim 1, wherein, The pressing plate driving assembly (3) comprises a telescopic air cylinder (301), the telescopic end of the telescopic air cylinder (301) is fixedly installed with a push plate (302), the top of the push plate (302) is penetrated and slidably installed with a plurality of positioning rods (303), the bottom ends of the plurality of positioning rods (303) are fixedly installed with a pressing plate (304), and the top ends of the plurality of positioning rods (303) are fixedly installed with limiting plates (305), the outer periphery of the positioning rod (303) is sleeved with a spring (306), and the two ends of the spring (306) are in contact with the opposite sides of the push plate (302) and the pressing plate (304). 3.The OCA optical adhesive bonding device for a display screen according to claim 2, characterized in that, The fitting frame (2) comprises a top plate (201) and three vertical rods (202), the three vertical rods (202) are fixedly installed at the bottom of the top plate (201), the telescopic air cylinder (301) is fixedly installed at the top of the top plate (201), and the top of the top plate (201) is provided with a hole matched with the telescopic end of the telescopic air cylinder (301), and the push plate (302) is sleeved and slidably installed on the outer periphery of the three vertical rods (202); The three vertical rods (202) are fixedly installed at the top of the working box (1).

4. The OCA optical adhesive bonding device for a display screen according to claim 3, characterized in that, The roller pressing assembly (4) comprises a counterweight rotating shaft one (401) and a counterweight rotating shaft two (402), the outer periphery of the counterweight rotating shaft one (401) and the counterweight rotating shaft two (402) is sleeved and fixedly installed with a roller pressing sleeve (403), the outer periphery of the two ends of the counterweight rotating shaft one (401) is sleeved and rotatably installed with a connecting plate one (404), one end of the two connecting plate ones (404) is rotatably installed on the left side of the bottom of the push plate (302) through a rotating block one (405); the outer periphery of the two ends of the counterweight rotating shaft two (402) is sleeved and rotatably installed with a connecting plate two (406), one end of the two connecting plate twos (406) is rotatably installed on the right side of the bottom of the push plate (302) through a rotating block two (407); The left side of the bottom of the push plate (302) is fixedly installed with two groups of magnetic adsorption seats one (408), the magnetic adsorption seat one (408) is adsorbed and matched with the counterweight rotating shaft two (402), the right side of the bottom of the push plate (302) is fixedly installed with a magnetic adsorption seat two (409), and the magnetic adsorption seat two (409) is adsorbed and matched with the counterweight rotating shaft one (401); One end of the connecting plate one (404) is fixedly installed with an inclined rotating limiting block one (4010) matched with the rotating block one (405), and one end of the connecting plate two (406) is fixedly installed with an inclined rotating limiting block two (4014) matched with the push plate (302).

5. The OCA optical adhesive bonding device for a display screen according to claim 4, characterized in that, The bottom of the top plate (201) is fixedly installed with a functional plate (4011) on both sides through a bolt and a nut, the bottom of the functional plate (4011) is fixedly installed with an insertion plate (4012), the top of the magnetic force adsorption seat one (408) and the magnetic force adsorption seat two (409) is provided with a through groove (4013), and the bottom end of the insertion plate (4012) penetrates through the push plate (302) and extends into the through groove (4013).

6. The OCA optical adhesive bonding device for a display screen according to claim 2, characterized in that, The top of the working box (1) is provided with a pre-laminating assembly (6), the pre-laminating assembly (6) comprises four single-head driving toothed plate (601) and two laminating plates (602), the front and rear sides of the bottom of the laminating plate (602) are fixedly installed with a sector gear (603), the front and rear sides of the top of the working box (1) are provided with a mounting groove (102), the two sector gears (603) on one of the laminating plates (602) are rotatably installed in the two mounting grooves (102) on the same side, the four single-head driving toothed plates (601) respectively pass through one mounting groove (102) and are in meshing connection with the sector gears (603), and the top ends of the four single-head driving toothed plates (601) are fixedly connected with the bottom of the push plate (302). The left and right sides of the top of the working box (1) are fixedly installed with a magnetic force adsorption plate (604), the surfaces of the two laminating plates (602) are embedded with iron sheets (605) matched with the magnetic force adsorption plate (604), and the two sides of the top of the push plate (302) are provided with T-shaped grooves (307) matched with the magnetic force adsorption plate (604) and the laminating plate (602).

7. The OCA optical adhesive bonding device for a display screen according to claim 6, characterized in that, The height adjusting assembly (5) comprises a U-shaped frame (501) and an adjusting plate (502), the top of the adjusting plate (502) is fixedly installed with a convex plate (503), the bottom of the adjusting plate (502) is fixedly installed with an isosceles triangle plate (504), the front surface of the U-shaped frame (501) penetrates and is rotatably installed with a bidirectional screw rod (505), the front end of the bidirectional screw rod (505) is fixedly installed with a knob (506), the outer periphery of the bidirectional screw rod (505) is sleeved and threadedly installed with two push blocks (507), the top of each push block (507) is fixedly installed with a right-angled trapezoidal plate (508), and the inclined surfaces of the two right-angled trapezoidal plates (508) are in sliding connection with the two inclined surfaces of the isosceles triangle plate (504) respectively. The U-shaped frame (501) is fixedly installed on the top of the inner cavity of the working box (1) through bolts, and the convex plate (503) is arranged in the working groove (101). 8.The OCA optical adhesive bonding device for a display screen according to claim 7, wherein, The top of the adjusting plate (502) is provided with four auxiliary rods (509) penetrating and slidingly installed at the four corners, the four auxiliary rods (509) are fixedly installed on the top of the inner cavity of the working box (1), the outer periphery of the auxiliary rod (509) is sleeved with a spring (5010), and the two ends of the spring (5010) are in contact with the top of the inner cavity of the working box (1) and the top of the adjusting plate (502) respectively. 9.A method for bonding of OCA optical adhesive for display screen, applied to the display screen OCA optical adhesive bonding device of claim 5 or 8, characterized in that, The laminating method comprises the following steps: S1, in the vacuum chamber, the display module to be attached is placed in the working groove (101), optical glue is applied, and then the cover plate glass is attached; S2, control the telescopic cylinder (301) to retract a set distance, the telescopic cylinder (301) drives the push plate (302) to rise, the push plate (302) drives the sector gear (603) to rotate a quarter of a circle through the single-head driving toothed plate (601), the sector gear (603) drives the attachment plate (602) to rotate, and the cover plate glass is pre-pressed; During the process, the push plate (302) drives the magnetic adsorption seat one (408) and the magnetic adsorption seat two (409) to rise, and the two roller pressing sleeves (403) are separated from the magnetic adsorption seat one (408) and the magnetic adsorption seat two (409) respectively under the resistance and limiting of the insertion plate (4012), the counterweight rotating shaft one (401) drives one roller pressing sleeve (403) to rotate downward until it is limited by the inclined rotating limiting block one (4010) and stops rotating, and the counterweight rotating shaft two (402) drives the other roller pressing sleeve (403) to rotate downward until it is limited by the inclined rotating limiting block two (4014) and stops rotating; S3, control the telescopic cylinder (301) to extend, the telescopic cylinder (301) drives the push plate (302) to descend, the push plate (302) drives the sector gear (603) to reverse through the single-head driving toothed plate (601), so that the attachment plate (602) is separated from the cover plate glass, and when the single-head driving toothed plate (601) continues to descend and is about to separate from the sector gear (603), the magnetic adsorption plate (604) keeps the attachment plate (602) vertical through the adsorption iron sheet (605); S4, as the telescopic cylinder (301) continues to extend, the roller pressing sleeve (403) on the counterweight rotating shaft one (401) first contacts the cover plate glass, and then rolls the cover plate glass to the right, and after the counterweight rotating shaft one (401) moves to the right side of the counterweight rotating shaft two (402), as the telescopic cylinder (301) continues to extend, the roller pressing sleeve (403) on the counterweight rotating shaft two (402) contacts the cover plate glass, and then rolls the cover plate glass to the left; S5, as the telescopic cylinder (301) continues to extend, the two roller pressing sleeves (403) are separated from the cover plate glass, the pressing plate (304) contacts the cover plate glass and compresses the spring one (306), and then the two roller pressing sleeves (403) move to the magnetic adsorption seat one (408) and the magnetic adsorption seat two (409) respectively, and the telescopic cylinder (301) stops extending, at this time, the magnetic adsorption seat one (408) adsorbs the counterweight rotating shaft two (402), and the magnetic adsorption seat two (409) adsorbs the counterweight rotating shaft one (401); S6, after the optical glue attachment is completed, control the telescopic cylinder (301) to retract and reset, and take out the display module and the cover plate glass attached from the working groove (101). 10.The method of claim 9, wherein, Before the display module is placed in the working tank (101) in the S1, the target thickness of the display module and the cover glass as a whole after optical adhesive bonding is obtained, and the height difference between the top horizontal plane of the convex plate (503) and the top horizontal plane of the working tank (1) is adjusted, that is, the knob (506) is rotated, the bidirectional screw rod (505) is rotated, the bidirectional screw rod (505) drives the two push blocks (507) to approach or move away from each other, in the process of the two push blocks (507) approaching each other, the push block (507) drives the right trapezoidal plate (508) to move, and the isosceles triangular plate (504) pushes the adjusting plate (502) to drive the convex plate (503) to rise; in the process of the two push blocks (507) moving away from each other, the push block (507) drives the right trapezoidal plate (508) to move, the spring (5010) pushes the adjusting plate (502) to drive the convex plate (503) to descend, and after the height difference between the top horizontal plane of the convex plate (503) and the top horizontal plane of the working tank (1) reaches the target thickness, the adjustment is completed.

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