Screen pressure maintaining device
By combining airbags and pressure plates, the pressure uniformity and stress balance of the screen pressure holding equipment are achieved, solving the problems of uneven pressure and stress concentration in traditional equipment, and improving the quality and efficiency of screen production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-25
- Publication Date
- 2026-03-24
AI Technical Summary
Existing screen pressure holding equipment has problems with uneven pressure distribution and stress concentration on the contact surface, especially when dealing with screens with micron-level unevenness or thickness differences, resulting in pressure damage, insufficient adhesive curing and low bonding strength.
The design combines an airbag and a pressure plate. The airbag is equipped with a pressure sensor. The pressure plate is driven by a pneumatic component to contact the screen with the airbag. Combined with a vacuum pump and a limit rod, the pressure distribution is precisely controlled, and the airbag's adaptability reduces pressure concentration on the contact surface.
It effectively prevents uneven pressure distribution, avoids stress concentration on the contact surface, ensures the high-temperature curing quality of the screen, and improves production efficiency and product yield.
Smart Images
Figure CN224028597U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to screen production machinery field especially relates to a screen pressure maintaining equipment BACKGROUND
[0002] In the manufacture and maintenance process of screen (such as LCD, OLED, flexible screen), pressure maintaining equipment is one of the key equipment, mainly used to provide stable pressure and temperature environment when screen multilayer material (such as cover plate glass, touch screen, display panel etc.) is attached, ensure that optical adhesive (such as OCA, LOCA) or UV adhesive is fully cured, avoid bubble, warping or attachment problem of not firm.
[0003] At present, the pressure maintaining equipment widely used in the industry is mainly rigid pressing plate type. Since the pressing plate is rigid structure, if screen substrate exists micron level unevenness or thickness difference (such as curved screen, flexible screen or local glue uneven thickness), it will lead to uneven pressure distribution, partial area pressure is too large (cause screen bruise, liquid crystal leakage), and partial area pressure is insufficient (cause glue curing is insufficient, attachment strength is low). And in the high temperature curing stage, the thermal expansion coefficient of rigid pressing plate does not match screen material, and stress concentration problem can be further intensified.
[0004] Therefore, it is necessary to provide a screen pressure maintaining equipment capable of effectively preventing uneven pressure distribution and avoiding contact surface stress concentration. SUMMARY
[0005] The utility model aims at providing a screen pressure maintaining equipment capable of effectively preventing uneven pressure distribution and avoiding contact surface stress concentration.
[0006] According to an aspect of the present application, a screen pressure maintaining equipment is provided, which comprises:
[0007] a base,
[0008] a support fixedly connected to the base;
[0009] a pressure maintaining part fixedly connected to the support, wherein the pressure maintaining part comprises a pneumatic part fixedly connected to the support, a pressing plate connected to the pneumatic part and located between the pneumatic part and the base, and an air bag located on the side of the pressing plate away from the pneumatic part;
[0010] Wherein, a pressure sensor is arranged on the air bag to monitor the surface pressure of the air bag.
[0011] More preferably, the equipment further comprises:
[0012] a chassis fixedly connected to the base;
[0013] A lower clamp is connected to the base plate by magnetic force and is located on the side of the base plate away from the base.
[0014] More preferably, the device further comprises:
[0015] A fixed part is fixedly connected to the base through the support and is located on the side of the support away from the pressure maintaining part.
[0016] An upper clamp is fixedly connected to the pressing plate and is located on the side of the pressing plate away from the pneumatic part.
[0017] More preferably, the air bag is fixedly connected to the upper clamp and is located on the side of the upper clamp away from the pressing plate.
[0018] More preferably, the device further comprises:
[0019] A limiting rod is fixedly connected to the base and the support and is located between the base and the support.
[0020] The support extends in a first direction perpendicular to the surface of the base when viewed in a direction perpendicular to the surface of the pressing plate.
[0021] More preferably, the limiting rod penetrates the pressing plate and the pneumatic part drives the pressing plate to move in the first direction.
[0022] More preferably, the device further comprises:
[0023] A vacuum pump is connected to the air bag pipeline and is in communication with the pressure sensor.
[0024] The vacuum pump injects or extracts gas into or from the air bag.
[0025] More preferably, the base comprises:
[0026] A start button is fixedly connected to the base and is electrically connected to the pneumatic part.
[0027] A timing panel is fixedly connected to the base and is located on the side of the base where the start buttons are arranged and between the start buttons.
[0028] More preferably, when the start button is pressed, the pressure maintaining part moves in the first direction and the air bag abuts against the lower clamp.
[0029] The device has the following advantages:
[0030] The gas bag is arranged on the side of the pressing disc away from the pneumatic part, and the gas bag abuts against the screen when the pressure maintaining part is used to press the screen, so that the gas bag can fill the contact surface between the screen, effectively preventing the problem of uneven distribution of the ramming pressure on the screen contact surface. The design of the gas bag abutting against the screen makes it possible to reduce the pressure on the contact surface by releasing the gas when the screen is cured at high temperature and the gas in the gas bag expands, thereby avoiding the concentration of pressure on the screen contact surface. BRIEF DESCRIPTION OF DRAWINGS
[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.
[0032] Figure 1 It is a perspective view of the device described in an embodiment of the present application;
[0033] Figure 2 It is a front view of the device described in an embodiment of the present application;
[0034] Figure 3 It is a rear view of the device described in an embodiment of the present application;
[0035] The drawing number is explained: 100, device; 10, base; 11, start button; 12, timing panel; 20, support; 30, pressure maintaining part; 31, pneumatic part; 32, pressing plate; 33, gas bag; 34, pressure sensor; 40, bottom plate; 50, lower clamp; 60, fixed part; 70, upper clamp; 80, limiting rod; 90, vacuum pump; F1, first direction. DETAILED DESCRIPTION
[0036] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the related drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.
[0037] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.
[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.
[0039] Reference will now be made to Figure 1 - Figure 3 An embodiment of the present application provides a screen pressure maintaining device 100, which comprises a base 10, a support 20 and a pressure maintaining part 30.
[0040] The support 20 is fixedly connected to the base 10. The pressure maintaining part 30 is fixedly connected to the support 20, and comprises a pneumatic part 31 fixedly connected to the support 20, a pressure plate 32 slidably connected to the pneumatic part 31 and located between the pneumatic part 31 and the base 10, and an air bag 33 located on a side of the pressure plate 32 away from the pneumatic part 31.
[0041] The fixed connection of the base 10 and the support 20 forms a stable support frame, ensuring the rigidity of the device 100 as a whole. The fixed connection of the pneumatic part 31 and the support 20 in combination with the sliding rod driven pressure plate 32 realizes the vertical linear motion that can be accurately controlled, making the pressure applying process smooth and controllable. The integrated design of the pressure plate 32 and the air bag 33 avoids rigid impact through flexible contact, while the pressure sensor 34 embedded on the surface of the air bag 33 can monitor the pressure distribution in real time, forming a closed-loop feedback to prevent local overpressure damage to the screen. The combination of pneumatic driving and the air bag 33 not only retains the reliability of the mechanical structure, but also utilizes the self-adaptive characteristics of the air cushion to uniformly disperse the pressure, which is especially suitable for fragile screen bonding processes. These features collectively solve the problems of uneven pressure, adjustment lag and fragile workpieces of traditional pressure maintaining devices 100, and take into account the automation precision and process safety.
[0042] More preferably, the device 100 further comprises a chassis 40 and a lower clamp 50.
[0043] The chassis 40 is fixedly connected to the base 10. The lower clamp 50 is magnetically connected to the chassis 40 and located on a side of the chassis 40 away from the base 10.
[0044] The fixing of the bottom plate 40 to the base 10 provides a stable base platform, ensuring the rigidity of the overall structure during the pressure maintaining process; the lower clamp 50 is connected to the bottom plate 40 by magnetic attraction, which not only realizes quick disassembly and positioning functions, facilitating the replacement of different specifications of screen molds, but also automatically corrects small positional deviations through the flexible characteristics of magnetic attraction, while avoiding the cumbersome operation and potential scratching risk caused by traditional bolt fixation. This modular design significantly improves the multi-workpiece adaptability and production efficiency of the equipment 100, and is particularly suitable for screen production lines that require frequent jig replacement, balancing the positioning accuracy and operational convenience.
[0045] More preferably, the equipment 100 further comprises a fixed part 60 and an upper clamp 70.
[0046] The fixed part 60 is fixedly connected to the base 10 through the support 20 and is located on the side of the support 20 away from the pressure maintaining part 30. The upper clamp 70 is fixedly connected to the pressing plate 32 and is located on the side of the pressing plate 32 away from the pneumatic part 31.
[0047] The fixed part 60 penetrates the support 20 and is anchored to the base 10, forming a rigid planar support structure behind the support 20, effectively counteracting the reaction force generated by the pneumatic part 31 during the pressure maintaining operation, preventing the deformation or vibration of the support 20; the upper clamp 70 is directly fixed to the lower side of the pressing plate 32, forming an integrated pressure transmission module with the air bag 33, which not only ensures the linearity of pressure output, but also realizes precise adaptation to different screen sizes through customized design of the clamp. This double reinforcement design not only enhances the overall mechanical stability, making the pressure maintaining process more stable and controllable, but also realizes quick changeover function through the modular upper clamp 70, significantly improving the multi-variety adaptation capability and production rhythm of the equipment 100 under the premise of ensuring process precision, especially suitable for flexible production needs of high-precision screen bonding process.
[0048] More preferably, the air bag 33 is fixedly connected to the upper clamp 70 and is located on the side of the upper clamp 70 away from the pressing plate 32.
[0049] The rigid connection of the air bag 33 and the upper clamp 70 ensures the coaxiality and perpendicularity of the pressure output, avoids the deflection error that may be caused by the traditional suspension type air bag 33, and uniformly disperses the pressure through the flexible contact characteristics of the air bag 33, thereby perfectly matching the micro unevenness of the screen surface. The rigid-flexible structure design ensures the mechanical precision of the pressure maintaining process through the rigid positioning of the upper clamp 70, and eliminates local stress concentration through the deformation self-adaptive ability of the air bag 33, thereby realizing high-precision pressure maintaining (±1% pressure uniformity), effectively protecting the brittle screen material, and being particularly suitable for the precise bonding process of high-end display screens such as OLED, and the modular design is also convenient for quickly replacing the upper clamp 70-air bag 33 combined unit according to different screen sizes.
[0050] More preferably, the device 100 further comprises a limiting rod 80. The limiting rod 80 is fixedly connected to the base 10 and fixedly connected to the support 20, and located between the base 10 and the support 20. In the direction perpendicular to the plate surface of the pressing plate 32, the support 20 extends in the first direction F1 perpendicular to the surface of the base 10.
[0051] The rigid support structure formed by the limiting rod 80 between the base 10 and the support 20 not only significantly enhances the torsional stiffness of the overall structure, but more importantly provides precise guidance for the vertical movement of the pressing plate 32. By strictly limiting the extension direction (first direction F1) of the support 20 to be perpendicular to the surface of the base 10, and cooperating with the hard constraint of the limiting rod 80 on the movement track of the pressing plate 32, the common phenomena of unbalanced load, jamming or inclined movement of the traditional pressure maintaining device 100 are completely eliminated. The "double-channel positioning system" (support 20 guidance + limiting rod 80 constraint) enables the pressing plate 32 to maintain linear motion precision under the drive of the pneumatic part 31, ensures that the pressure of the air bag 33 is always perpendicular to the screen plane, thereby controlling the angle deviation of the screen bonding within ±0.1°, which has decisive significance for the nanometer bonding process of the new generation of flexible OLED screens. The overload protection function of the limiting rod 80 can also prevent damage to the device 100 structure in abnormal conditions.
[0052] More preferably, the limiting rod 80 penetrates the pressing plate 32, and the pneumatic part 31 drives the pressing plate 32 to move in the first direction F1.
[0053] The limiting rod 80 not only strictly restricts the movement track of the pressing plate 32 as a rigid track, but also forms a "active driving-passive guiding" cooperative mechanism with the driving system of the pneumatic part 31, ensuring that the movement of the pressing plate 32 in the first direction F1 (vertical direction) has a micron-level straight line precision, and completely eliminates the common problems of partial load friction or movement jam in the traditional equipment 100; this through-type design enables the pressing plate 32 to obtain uniform circumferential guiding and supporting when bearing the driving force of the pneumatic part 31, avoiding the moment deformation caused by the cantilever structure, and reducing the cooperation gap between the moving parts (which can be controlled within ±0.01 mm), so that the air bag 33 pressure can be applied to the screen surface at a completely vertical angle, which is crucial for zero-defect bonding of ultra-thin display screens such as Micro-LED, and the overload protection function of the limiting rod 80 can prevent screen pressure injury through mechanical hard limiting when the pressure is abnormal, greatly improving the safety and process stability of the equipment 100.
[0054] More preferably, the device 100 further comprises a vacuum pump 90. The vacuum pump 90 is connected with the pipeline of the air bag 33, and is in communication connection with the pressure sensor 34. The vacuum pump 90 injects or extracts gas to the air bag 33.
[0055] The vacuum pump 90 is directly connected with the pipeline of the air bag 33, and cooperates with the real-time data feedback of the pressure sensor 34 to build a "monitoring-regulating" dynamic balance system, which can quickly inject gas to establish a pressure maintaining pressure of ±0.5kPa, and actively extract air to eliminate the risk of overpressure; this two-way air control capability not only enables the air bag 33 to adapt to the bonding requirements of screens of different thicknesses (such as the differentiated pressure requirements of rigid OLED and flexible screens), but more importantly, through the millisecond-level dynamic adjustment of air pressure, it completely solves the problems of pressure relaxation or overpressure damage existing in traditional mechanical pressure maintaining, and is particularly suitable for special bonding processes of curved screens and 3D glasses, and the communication connection function of the vacuum pump 90 provides pressure curve tracing capability for digital production, so that the pressure maintaining parameters of each screen can be completely recorded, greatly improving the controllability of the process and the product yield.
[0056] More preferably, the base 10 comprises a start button 11 and a timing panel 12.
[0057] The start button 11 is fixedly connected to the base 10 and electrically connected with the pneumatic part 31. The timing panel 12 is fixedly connected to the base 10 and located on the side of the base 10 where the start button 11 is provided, and between the two start buttons 11.
[0058] The direct electrical connection of the start button 11 and the pneumatic part 31 realizes one-key precise control, and the operator can trigger the complete pressure maintaining process including the pressing of the pneumatic part 31 and the inflation of the air bag 33 by single touch, thereby greatly reducing the risk of misoperation. The timing panel 12 is centrally arranged between the two start buttons 11, which not only conforms to the ergonomic habit of two-hand operation, but also ensures that the operator's line of sight naturally focuses on the pressure maintaining time data. The design of the two components provides a precision basis for the quality control of intelligent production lines, and is especially suitable for the visual and traceability requirements of high-end products such as automobile display screens.
[0059] More preferably, when the start button 11 is pressed, the pressure maintaining part 30 moves in the first direction F1, and the air bag 33 abuts against the lower clamp 50.
[0060] When the start button 11 is triggered, the system automatically performs the coordinated action of pressing the pneumatic part 31 and inflating the air bag 33, so that the pressure maintaining part 30 moves in the strictly vertical first direction F1, ensuring that the air bag 33 contacts the lower clamp 50 with zero angle deviation. This design not only eliminates the positional error caused by manual operation, but also establishes uniform pressure distribution through the plane adaptive fitting of the air bag 33 and the lower clamp 50 at the moment of contact, perfectly solving the common edge stress concentration problem of traditional pressure maintaining equipment 100. Especially for the bonding process of ultra-thin flexible screens, this design can ensure that the pressure reaches the set value within milliseconds and fluctuates less than ±1%, realizing a double breakthrough in precision and efficiency.
[0061] Therefore, the side of the pressure plate away from the pneumatic part 31 is provided with the air bag 33, and the air bag 33 abuts against the screen when the pressure maintaining part 30 is pressed, so that the air bag 33 can fill the contact surface between the screen, effectively preventing the problem of uneven distribution of screen contact surface ramming pressure. And the design of the air bag 33 abutting against the screen makes it possible to reduce the pressure on the contact surface by deflating when the screen is cured at high temperature and the gas in the air bag 33 expands, thereby avoiding the concentration of pressure on the screen contact surface.
[0062] The above-described embodiments only express several embodiments of the present application, and the description is relatively specific and detailed, but it should not be understood as limiting the scope of the patent of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application.
Claims
1. A screen pressure-maintaining device, characterized in that, The device includes: Base The bracket is fixedly connected to the base; A pressure-holding part is fixedly connected to the bracket. The pressure-holding part includes a pneumatic part fixedly connected to the bracket, a pressure plate connected to the pneumatic part by a slide rod and located between the pneumatic part and the base, and an airbag located on the side of the pressure plate away from the pneumatic part. The airbag is equipped with a pressure sensor to monitor the surface pressure of the airbag.
2. The screen pressure-maintaining device according to claim 1, characterized in that, The device also includes: The chassis is fixedly connected to the base; The lower clamp is magnetically connected to the chassis and is located on the side of the chassis away from the base.
3. The screen pressure-maintaining device according to claim 1, characterized in that, The device also includes: The fixing part is fixedly connected to the base through the bracket and is located on the side of the bracket away from the pressure-holding part; The upper clamp is fixedly connected to the pressure plate and is located on the side of the pressure plate away from the pneumatic part.
4. The screen pressure-maintaining device according to claim 3, characterized in that, The airbag is fixedly connected to the upper clamp and is located on the side of the upper clamp away from the pressure plate.
5. A screen pressure-maintaining device according to claim 1, characterized in that, The device also includes: A limiting rod is fixedly connected to the base and the bracket, and is located between the base and the bracket; Viewed along a direction perpendicular to the surface of the pressure plate, the bracket extends along a first direction perpendicular to the surface of the base.
6. A screen pressure-maintaining device according to claim 5, characterized in that, The limiting rod passes through the pressure plate, and the pneumatic part drives the pressure plate to move along the first direction.
7. A screen pressure-maintaining device according to claim 1, characterized in that, The device also includes: A vacuum pump is connected to the airbag tubing and is also communicatively connected to the pressure sensor. The vacuum pump injects gas into or extracts gas from the airbag.
8. A screen pressure-maintaining device according to claim 2, characterized in that, The base includes: The start button is fixedly connected to the base and electrically connected to the pneumatic unit; The timing panel is fixedly connected to the base and is located on the side of the base where the start button is located, and is located between the two start buttons.
9. A screen pressure-maintaining device according to claim 8, characterized in that, When the start button is pressed, the pressure-holding part moves in the first direction, and the airbag abuts against the lower clamp.