Pressure maintaining structure, baking tool and display screen processing method

Abstract

The application relates to a pressure maintaining structure, a baking tool and a display screen processing method. The pressure maintaining structure comprises a first plate body, a second plate body and a connecting mechanism, the connecting mechanism is arranged between the first plate body and the second plate body, the connecting mechanism is provided with a first state and a second state, when the connecting mechanism is in the first state, the first plate body and the second plate body can press the two sides of a workpiece; when the connecting mechanism is in the second state, the workpiece can be taken out from between the first plate body and the second plate body. During baking, the workpiece can be placed between the first plate body and the second plate body, and the workpiece is pressed by the first plate body and the second plate body, when water vapor in a cover plate of the workpiece volatilizes, under the pressing action of the first plate body and the second plate body, the water vapor is pressed out of the cover plate and a glass matching surface, that is, the water vapor volatilizes from the periphery of the cover plate and the glass matching surface to the outside, thereby greatly avoiding the accumulation of water vapor on the cover plate and the glass matching surface, and reducing the white printing of the cover plate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display screen processing, in particular to a pressure maintaining structure, a baking tool and a display screen processing method. BACKGROUND

[0002] In the display screen processing process, the glass needs to be attached to the cover plate, the glass surface can be processed to form a guide point line, and after completion, touch operation can be performed, which is commonly known as a touch screen assembly. The cover plate is generally made of acrylic material, and the glass and the cover plate need to be attached and then baked to remove the water vapor in the cover plate, so that the cover plate and the glass are more attached. However, during the baking process, the water vapor volatilized in the cover plate will adhere to the surface of the side of the cover plate facing the glass, forming a white mark, which is obvious through the glass, affecting the further processing of the baked product and causing waste of materials. In related technologies, the cover plate material needs to be replaced, which not only increases the cost but also cannot meet the common baking requirements with the glass. SUMMARY

[0003] Therefore, it is necessary to provide a pressure maintaining structure, a baking tool and a display screen processing method to solve the problem that water vapor volatilized in the cover plate during the baking process of the cover plate and the glass is easy to form a white mark.

[0004] An embodiment of the first aspect of the present application provides a pressure maintaining structure, comprising:

[0005] a first plate body;

[0006] a second plate body, the second plate body is arranged in layers with the first plate body, and a workpiece is placed between the second plate body and the first plate body;

[0007] a connecting mechanism, the connecting mechanism is arranged between the first plate body and the second plate body; the connecting mechanism is provided with a first state and a second state;

[0008] When the connecting mechanism is in the first state, the first plate body and the second plate body can press the two sides of the workpiece;

[0009] When the connecting mechanism is in the second state, the workpiece can be taken out from between the first plate body and the second plate body.

[0010] In one of the embodiments, the connecting mechanism includes a connecting piece, the connection between the connecting piece and the first plate body is detachable connection, and / or the connection between the connecting piece and the second plate body is detachable connection.

[0011] In one of the embodiments, the connecting mechanism includes a telescopic structure for adjusting the distance between the first plate body and the second plate body.

[0012] In one of the embodiments, the connecting mechanism further comprises a pressure detecting member for detecting the pressing force of the first plate body and the second plate body on the workpiece, and the connecting member is an electrically controlled telescopic structure, and the pressure detecting member is in communication connection with the connecting member.

[0013] In one of the embodiments, the pressure maintaining structure further comprises a recess for limiting the workpiece, and the recess is arranged on the first plate body and / or the second plate body.

[0014] In one of the embodiments, the pressure maintaining structure further comprises a gas guiding groove arranged on the first plate body and / or the second plate body along the circumferential direction of the recess, and the gas guiding groove is in communication with the recess and the outside when the workpiece is placed in the recess.

[0015] In one of the embodiments, the wall surface of the first plate body is convex near the middle part of the wall surface of the second plate body, and / or the wall surface of the second plate body is convex near the middle part of the wall surface of the first plate body.

[0016] In one of the embodiments, the pressure maintaining structure further comprises a buffer layer arranged on the wall surface of the first plate body and / or the wall surface of the second plate body.

[0017] The second aspect of the embodiments of the present application proposes a baking tool, which comprises a heat source and the above-mentioned pressure maintaining structure, and the heat source is used for heating and baking the pressure maintaining structure.

[0018] The third aspect of the embodiments of the present application proposes a display screen processing method based on the above-mentioned baking tool, and the processing method comprises the following steps.

[0019] providing a cover plate and a glass;

[0020] attaching the cover plate and the glass;

[0021] pressing and maintaining the pressure of the attached cover plate and glass;

[0022] heating and baking the cover plate and the glass in the pressure maintaining process.

[0023] The pressure maintaining structure comprises a first plate body, a second plate body and a connecting mechanism. The connecting mechanism is arranged between the first plate body and the second plate body. When the workpiece needs to be baked, the workpiece can be placed between the first plate body and the second plate body, and the workpiece is pressed by the first plate body and the second plate body. When the water vapor in the cover plate evaporates, the water vapor is pressed out of the cover plate and the glass matching surface under the pressing action of the first plate body and the second plate body, that is, the water vapor evaporates from the periphery of the cover plate and the glass matching surface to the outside, thereby greatly avoiding the accumulation of water vapor on the cover plate and the glass matching surface, reducing the white printing of the cover plate, and avoiding the replacement of the cover plate material. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is a schematic view of the connecting mechanism of the pressure maintaining structure of the embodiment of the application in the first state.

[0025] Figure 2 It is a schematic view of the connecting mechanism of the pressure maintaining structure of the embodiment of the application in the second state.

[0026] Figure 3 It is a schematic view of the cross section of the pressure maintaining structure of the embodiment of the application.

[0027] Figure 4 It is Figure 3 It is an enlarged view of the middle A view.

[0028] Figure 5 It is a schematic view of the first side wall and the second side wall of the pressure maintaining structure of the embodiment of the application.

[0029] In the figure:

[0030] 1, first plate body; 11, first side wall; 12, holding part;

[0031] 2, second plate body; 21, second side wall; 22, limiting part;

[0032] 3, connecting mechanism; 31, connecting piece; 32, pressure detecting piece;

[0033] 4, groove; 41, first opening;

[0034] 5, air guide groove;

[0035] 6, buffer layer;

[0036] 7, empty position. DETAILED DESCRIPTION

[0037] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described herein and by one of ordinary skill in the art without departing from the spirit and scope of the present application, and it is therefore intended that all such variations be considered as falling within the scope of the present application. It should be understood that the use of the terms "include", "comprise" or "contain" herein should not be understood as limiting the present application to the features or steps described herein, but rather the use of these terms is intended to cover the presence of the features or steps described herein as well as the presence of other features or steps not described herein.

[0038] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0039] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features referred to. Therefore, the features defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0040] In the present application, unless otherwise explicitly specified and limited, if the terms "mount", "connect", "connect", "fix" and the like appear, these terms should be interpreted broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise explicitly limited. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0042] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0043] See Figure 1 , Figure 1 This diagram illustrates a pressure-holding structure in one embodiment of the present application with its connecting mechanism in a first state. The pressure-holding structure provided in one embodiment includes a first plate 1, a second plate 2, and a connecting mechanism 3. The first plate 1 and the second plate 2 are stacked on top of each other, with a workpiece placed between the second plate 2 and the first plate 1. The connecting mechanism 3 is disposed between the first plate 1 and the second plate 2 to separate the first plate 1 and the second plate 2, allowing for the insertion or removal of the workpiece. The workpiece may include a cover plate and glass, with the cover plate and glass stacked and fitted together. Alternatively, other components to be heated may be selected based on actual usage requirements. The connecting mechanism 3 has a first state and a second state. When the connecting mechanism 3 is in the first state, the first plate 1 and the second plate 2 can press the two sides of the workpiece together, ensuring a tight fit between the cover plate and the glass, significantly reducing the accumulation of water vapor evaporating from the cover plate between the cover plate and the glass. The first state is also known as the pressed state. When the connecting mechanism 3 is in the second state, the workpiece can be removed from between the first plate 1 and the second plate 2 so that the workpiece can be processed later or a new workpiece can be processed and placed in. The second state is also the unlocked state.

[0044] Thus, when the workpiece needs to be baked, the workpiece can be placed between the first plate body 1 and the second plate body 2, and the workpiece is pressed by the first plate body 1 and the second plate body 2. When the water vapor in the cover plate evaporates, under the pressing action of the first plate body 1 and the second plate body 2, the water vapor will be pressed out of the cover plate and the glass mating surface, that is, the water vapor will evaporate from the periphery of the cover plate and the glass mating surface to the outside, thereby greatly avoiding the accumulation of water vapor on the cover plate and the glass mating surface, reducing the white print of the cover plate, reducing the workpiece from being damaged, avoiding the replacement of the cover plate material, and solving the problem that the water vapor in the cover plate evaporates to form a white print during the baking process of the cover plate and the glass.

[0045] Referring to Figures 1-2 In some embodiments, the connecting mechanism 3 includes a connecting piece 31, and the connection between the connecting piece 31 and the first plate body 1 is detachable connection, and / or the connection between the connecting piece 31 and the second plate body 2 is detachable connection, so that the connecting piece 31 is detachably connected with at least one of the first plate body 1 and the second plate body 2, so as to facilitate the separation of the first plate body 1 and the second plate body 2, and facilitate the workpiece to be taken out or put in.

[0046] Among them, the connecting piece 31 can be but not limited to a bolt, and the connection between the connecting piece 31 and the first plate body 1 or the connection between the connecting piece 31 and the second plate body 2 can be but not limited to threaded connection, clamping, plug-in or magnetic attraction connection, which is convenient to connect or disassemble. The connecting mechanism 3 can be centrally symmetrically provided with two on the first plate body 1, and the connecting mechanism 3 is also provided on the second plate body 2 at a corresponding position of the first plate body 1. The first plate body 1 and the second plate body 2 can be but not limited to a square structure, and the connecting mechanism 3 can be arranged at two diagonal positions of the first plate body 1, which is firm and convenient to install and disassemble.

[0047] In some embodiments, the connecting mechanism 3 includes a telescopic structure for adjusting the distance between the first plate body 1 and the second plate body 2. The telescopic structure can be but not limited to a screw, a pneumatic cylinder, a hydraulic cylinder or an electric push rod, which can adjust its length by its telescopic movement, thereby adjusting the distance between the first plate body 1 and the second plate body 2. Not only can the first plate body 1 and the second plate body 2 exert different degrees of pressing force on the workpiece, but also the same pressure maintaining structure can be applied to workpieces of different thicknesses, which has a wider range of use.

[0048] Referring to Figures 2-3In some embodiments, the connecting mechanism 3 further comprises a pressure detection piece 32, which can be but is not limited to a pressure sensor, for detecting the pressing force of the first plate body 1 and the second plate body 2 on the workpiece. The connecting piece 31 is an electrically controlled telescopic structure, and the pressure detection piece 32 is in communication connection with the connecting piece 31, that is, the connecting piece 31 can be internally provided with a controller or an electromagnetic driver, and according to the comparison of the detection signal of the pressure detection piece 32 with the preset pressing force, the first plate body 1 and the second plate body 2 can be adjusted to approach or move away from each other, and the adjustment is more convenient to use.

[0049] Referring to Figures 2-3 In some embodiments, the pressure maintaining structure further comprises a groove 4 provided on the first plate body 1 and / or the second plate body 2, that is, the groove 4 is provided on at least one of the first plate body 1 and the second plate body 2, and the first plate body 1 and the second plate body 2 are stacked on each other to surround the workpiece in the groove 4, for limiting the workpiece and reducing the situation that the workpiece is taken out of the groove 4.

[0050] The shape of the groove 4 is the same as that of the workpiece, and the size of the groove 4 can be equal to or greater than that of the workpiece, so as to provide a transfer cavity for water vapor and facilitate the outflow of water vapor. The shape of the groove 4 can be but is not limited to a square shape. The circumferential side wall of the groove 4 can have a certain height, and when the first plate body 1 and the second plate body 2 press the workpiece, the opposite surfaces of the first plate body 1 and the second plate body 2 can also abut each other, that is, the circumferential side walls of the grooves 4 abut each other, so as to surround the groove 4, and the first plate body 1 and the second plate body 2 have a larger contact connection area, and the cooperation of the two is more compact, reducing the warping deformation of the first plate body 1 and the second plate body 2 when they are matched.

[0051] Referring to Figures 1-2 In some embodiments, the pressure maintaining structure further comprises an air guide groove 5, which is provided on the first plate body 1 and / or the second plate body 2 along the circumference of the groove 4, that is, the air guide groove 5 is provided on at least one of the first plate body 1 and the second plate body 2, and the air guide groove 5 can be provided on the bottom wall or the side wall of the groove 4. When the workpiece is placed in the groove 4, the air guide groove 5 is in communication with the groove 4 and the outside, that is, the air guide groove 5 can form a water vapor flow channel in the circumference of the workpiece, which not only can increase the containing intermediate space of the overflowed water vapor from the workpiece, but also can increase the flow area of the water vapor from the groove 4 to the outside, so that the water vapor can be more quickly guided to the outside, reducing the accumulation of water vapor in the groove 4.

[0052] The groove 4 has at least a first opening 41, and the air outlet of the air guide groove 5 is arranged at the first opening 41, so that the water vapor can be more quickly guided out. The groove 4 can further be provided with a limiting part 22, which can be but is not limited to a long strip-shaped protruding structure. The limiting part 22 can be arranged at the position of the first opening 41, and is used for limiting the workpiece, that is, when the workpiece is placed into the groove 4, the workpiece can be limited by the limiting part 22 at the first opening 41, so as to avoid the workpiece from falling out of the groove. The cross section of the air guide groove 5 can be but is not limited to a square or a circle, and the air guide groove 5 can quickly guide out the water vapor.

[0053] In some embodiments, the air guide groove 5 is arranged in multiple rows and multiple columns, and the air guide grooves 5 are in communication with each other, so as to be suitable for workpieces of different sizes. When the workpiece is placed in the groove 4 and the air guide groove 5 is arranged, the remaining air guide grooves 5 still have the air guiding effect and can accelerate the water vapor to be discharged. Of course, the air guide groove 5 can also be designed as a U-shaped profile groove, and the air guide groove 5 can be arranged along the circumference of the workpiece, and the end portions of the air guide groove 5 can be gathered at the first opening 41 and communicated with the outside.

[0054] Referring to Figure 5 In some embodiments, the wall surface of the first plate body 1 near the second plate body 2 is outwardly convex, and / or the wall surface of the second plate body 2 near the first plate body 1 is outwardly convex. Specifically, the side wall of the first plate body 1 near the second plate body 2 is a first side wall 11, which is outwardly convex from the circumferential direction of the first side wall 11 to the middle direction of the first side wall 11, that is, the first side wall 11 can be a spherical surface structure with a certain convexity. Similarly, the side wall of the second plate body 2 near the first plate body 1 is a second side wall 21, which is outwardly convex from the circumferential direction of the second side wall 21 to the middle direction of the second side wall 21, that is, the second side wall 21 can be a spherical surface structure with a certain convexity. In this way, at least one of the first side wall 11 and the second side wall 21 is designed as a spherical surface structure, so that the pressing force on the middle of the workpiece is greater than the circumferential pressing force, which is more conducive to the discharge of water vapor between the middle cover plate and the glass of the workpiece and reduces the accumulation of water vapor. It should be noted that the pressure maintaining structure can be applied not only to the pressure maintaining of the middle cover plate and the glass of the flat screen, but also to the pressure maintaining of the middle cover plate and the glass of the curved screen. When the pressure maintaining structure is applied to the curved screen, the wall surface of the first plate body 1 and the wall surface of the second plate body 2 can also be provided with a further extrusion structure which is outwardly convex in the middle, based on the adaptation of the wall surface of the first plate body 1 and the wall surface of the second plate body 2 to the curved screen, which is more conducive to the discharge of water vapor.

[0055] Referring to Figure 4In some embodiments, the pressure maintaining structure further comprises a buffer layer 6 arranged on the wall surface of the first plate body 1 and / or the wall surface of the second plate body 2, that is, at least one of the first plate body 1 and the second plate body 2 is provided with the buffer layer 6. The buffer layer 6 can be, but is not limited to, an elastic material layer or a plurality of springs, and is capable of forming elastic buffering between the first side wall 11 and the workpiece or between the second side wall 21 and the workpiece, so as to form a pressing force on the workpiece while reducing the excessive extrusion damage to the workpiece.

[0056] Referring to Figures 1-2 The first plate body 1 and / or the second plate body 2 can be provided with a holding portion 12, which can be, but is not limited to, an open slot or a handle, so as to be held and operated by a user, and the first plate body 1 and the second plate body 2 are more easily separated. Alternatively, the holding portion 12 can be an open slot structure arranged on the first plate body 1. The first plate body 1 and / or the second plate body 2 can be provided with a clearance 7 for the protruding portion on the workpiece to extend into, so as to reduce the interference between the protruding portion on the workpiece and the first plate body 1 and the second plate body 2. The materials of the first plate body 1 and the second plate body 2 can be bakelite or other high-temperature-resistant materials, which can adapt to high-temperature baking. The grooves 4 on the first plate body 1 and the second plate body 2 can be provided with a plurality of grooves, so as to be used for placing a plurality of workpieces.

[0057] Referring to Figures 1-2 Another embodiment of the present application provides a baking tool, which comprises a heat source and the above-mentioned pressure maintaining structure. The heat source is used for heating and baking the pressure maintaining structure, and the pressure maintaining structure can be an auxiliary jig applied in the dehydration of the cover plate and glass baking process. The material of the cover plate can be acrylic material or other materials prone to water vapor evaporation. When the workpiece needs to be baked, the workpiece can be placed between the first plate body 1 and the second plate body 2, and the workpiece is pressed by the first plate body 1 and the second plate body 2. When the water vapor in the cover plate evaporates, the water vapor is pressed out of the cover plate and the glass mating surface under the pressing action of the first plate body 1 and the second plate body 2, that is, the water vapor evaporates from the periphery of the cover plate and the glass mating surface to the outside, thereby greatly avoiding the accumulation of water vapor on the cover plate and the glass mating surface, reducing the white printing of the cover plate, and avoiding the replacement of the cover plate material.

[0058] During operation, the workpiece is placed in the groove 4 between the first plate body 1 and the second plate body 2, and it is necessary to check whether the workpiece is placed in place in the circumferential direction of the groove 4. The first plate body 1 and the second plate body 2 are provided with a clearance, and need to be aligned and installed. Then, the second plate body 2 is buckled with the first plate body 1, and it is necessary to check whether the connecting mechanism 3 is connected to the first plate body 1 and the second plate body 2 in place. After the check is completed, the pressure maintaining structure and the workpiece can be placed together into a baking process. After baking is completed, the first plate body 1 and the second plate body 2 are separated, and the workpiece is taken out.

[0059] Referring to Figures 1-2The display screen processing method provided by the still another embodiment of the present application is based on the baking tool described above, and the processing method comprises the following steps:

[0060] The cover plate and the glass are provided;

[0061] The cover plate and the glass are adhered, that is, an adhesive can be coated between the cover plate and the glass to adhere the cover plate and the glass to each other.

[0062] The adhered cover plate and the glass are compressed and pressure-maintained, that is, the cover plate and the glass are compressed and maintained at a preset pressure by the first plate body 1 and the second plate body 2, so that the cover plate and the glass are adhered more closely, and the distance between the cover plate and the glass is reduced.

[0063] The cover plate and the glass in the pressure-maintained state are heated and baked, and in the baking process, when the water vapor in the cover plate volatilizes, the water vapor is pressed out of the mating surface of the cover plate and the glass under the compression and pressure-maintenance of the first plate body 1 and the second plate body 2, that is, the water vapor volatilizes from the periphery of the mating surface of the cover plate and the glass to the outside, so that the accumulation of water vapor on the mating surface of the cover plate and the glass is greatly avoided, the white printing of the cover plate is reduced, the replacement of the cover plate material is avoided, the quality of the display screen is improved, and the rate of defective products is reduced.

[0064] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0065] The above-described embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A pressure retaining structure, characterized by, The utility model relates to a pressure maintaining structure for glass and cover plate, comprising: a first plate body (1); a second plate body (2) which is arranged in layers with the first plate body (1), and a space for placing a workpiece between the first plate body (1) and the second plate body (2); a connecting mechanism (3) arranged between the first plate body (1) and the second plate body (2), the connecting mechanism (3) being provided with a first state and a second state; when the connecting mechanism (3) is in the first state, the first plate body (1) and the second plate body (2) can press the two sides of the workpiece; when the connecting mechanism (3) is in the second state, the workpiece can be taken out from between the first plate body (1) and the second plate body (2); the middle part of the wall surface of the first plate body (1) is convex, and the middle part of the wall surface of the second plate body (2) is convex, so that the pressure on the middle part of the workpiece is greater than the circumferential pressure, which is beneficial to the discharge of water vapor between the cover plate and the glass in the middle part of the workpiece and reduces the accumulation.

2. The pressure retaining structure of claim 1, wherein, the connecting mechanism (3) comprises a connecting piece (31), the connection between the connecting piece (31) and the first plate body (1) is detachable, and / or the connection between the connecting piece (31) and the second plate body (2) is detachable.

3. The pressure retaining structure of claim 1, wherein, the connecting mechanism (3) comprises a telescopic structure for adjusting the distance between the first plate body (1) and the second plate body (2).

4. The pressure retaining structure of claim 3, wherein, the connecting mechanism (3) further comprises a pressure detection piece (32) for detecting the pressure of the first plate body (1) and the second plate body (2) on the workpiece, the connecting piece (31) is an electrically controlled telescopic structure, and the pressure detection piece (32) is in communication connection with the connecting piece (31).

5. The pressure retaining structure of claim 1, wherein, the pressure maintaining structure further comprises a groove (4) for limiting the workpiece, and the groove (4) is arranged on the first plate body (1) and / or the second plate body (2).

6. The pressure retaining structure of claim 5, wherein, the pressure maintaining structure further comprises an air guide groove (5) which is arranged on the first plate body (1) and / or the second plate body (2) along the circumference of the groove (4), and when the workpiece is placed in the groove (4), the air guide groove (5) is in communication with the groove (4) and the air guide groove (5) is in communication with the outside.

7. The pressure retaining structure according to any one of claims 1 to 6, wherein the pressure maintaining structure further comprises a buffer layer (6) arranged on the wall surface of the first plate body (1) and / or the second plate body (2).

8. A baking fixture, characterized by, a heat source and the pressure maintaining structure of any one of claims 1-7, the heat source being used for heating and baking the pressure maintaining structure.

9. A method of processing a display screen, characterized by the baking tooling of any one of claim 8, the processing method comprising: providing a cover plate and a glass; attaching the cover plate and the glass; pressing and maintaining the pressure of the attached cover plate and glass, so that the pressure on the middle part of the workpiece is greater than the circumferential pressure; heating and baking the cover plate and the glass in the pressure maintaining state.

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