Pressing device and pressing method for LED light board

Abstract

The present application discloses a pressing device and pressing method for an LED light board, wherein the pressing device comprises an upper jig, a lower jig, a mounting frame and an adjusting mechanism, wherein the lower jig and the adjusting mechanism are fixed on the mounting frame, and the lower jig is provided with a pressing area for placing the LED light board, and the upper jig is buckled on the lower jig to press the LED light board, thereby flattening the light-emitting surface of the LED light board to improve the flatness of the LED light board, thereby improving the light-emitting effect, and secondly, the adjusting mechanism comprises a push plate and a driving assembly for driving the push plate to move back and forth, and by driving the push plate to drive the LED light board to move, the position of the LED light board can be adjusted, thereby enabling the LED light board to be accurately aligned with the upper jig, thereby avoiding damage to electronic components on the LED light board during the pressing process of the upper jig.

Description

Technical Field

[0001] The present application relates to the field of LED display technology, and in particular to a pressing device and pressing method for an LED light board. Background Art

[0002] Chip on Board (COB) packaging technology is a type of LED packaging technology and is also one of the current mainstream packaging processes. In the COB packaging process, you need to first apply a layer of solder paste on the soldering position of the circuit board, then place the LED chip on the solder paste through a placement machine, and then perform a solder paste curing process to complete the electrical connection of the LED chip and obtain an LED light board. Products using COB packaging technology have the advantages of wide viewing angle, ultra-light, wear-resistant and easy to clean, and strong heat dissipation capacity, and are very popular in the market.

[0003] In the prior art, due to the influence of the process, the solder paste thickness of the positive and negative electrode welding positions may be inconsistent, resulting in the positive and negative electrodes of a single LED chip not being in the same plane, that is, the light-emitting surface of the LED chip is tilted; or for different LED chips, the different solder paste thicknesses or different patch strengths may cause different LED chips to have different heights, resulting in the light-emitting surfaces of different LED chips not being in the same plane. The above factors will make the light-emitting surface of the LED lamp board unable to meet the flatness requirements, affecting the light-emitting effect. Summary of the invention

[0004] The main technical problem solved by the present application is to provide a pressing device and pressing method for an LED light board, which can improve the flatness of the light-emitting surface of the LED light board, thereby improving the light-emitting effect.

[0005] The present application provides a pressing device for an LED light panel, comprising an upper jig, a lower jig, a mounting frame, and at least one adjustment mechanism;

[0006] The lower fixture comprises a pressing area for placing the LED light board and a fixing area arranged around the periphery of the pressing area, the fixing area is fixed to the mounting frame, and the upper fixture is buckled on the lower fixture to press the LED light board; at least one limiting platform is arranged on the fixing area, the edge line of the limiting platform is flush with the edge line of the pressing area, and the fixing area opposite to the limiting platform is an empty area, and each adjustment mechanism is correspondingly arranged on the area on the same side of each empty area in the mounting frame;

[0007] The adjustment mechanism includes a push plate and a drive assembly, wherein the drive assembly is fixed to an area of ​​the mounting frame located on the same side as the vacant area, and the push plate includes a first surface facing the pressing area and a second surface facing away from the pressing area; the drive assembly is connected to the second surface of the push plate to drive the push plate to move closer to or away from the pressing area, and a boss is provided on the first surface of the push plate. When the push plate moves closer to the pressing area, the boss contacts the LED light board on the pressing area to push the LED light board to move, thereby adjusting the position of the LED light board.

[0008] The pressing area includes a bearing surface for placing the LED light board and a back surface opposite to the bearing surface, and a heating module is arranged on the back surface.

[0009] Wherein, the driving assembly includes a push rod, a first connecting rod, a second connecting rod, a handle and a base;

[0010] The base is fixed on the mounting frame, and a support member for supporting the push rod is provided on the base, one end of the push rod is connected to the push plate, the other end of the push rod is rotatably connected to one end of a first connecting rod, the other end of the first connecting rod is rotatably connected to one end of a second connecting rod, the other end of the second connecting rod is rotatably connected to the base, and the handle is fixedly connected to the one end of the second connecting rod.

[0011] Wherein, the handle and the second connecting rod are integrally formed.

[0012] Wherein, the adjustment mechanism further comprises a fixing assembly, and the fixing assembly comprises a bolt and a fixing block;

[0013] The fixing block is fixed on the mounting frame and is located between the vacant area and the base. The fixing block and the push plate are both provided with threaded holes. The bolts are threadedly connected with the threaded holes on the fixing block and the push plate in sequence to fix the push plate.

[0014] There are two drive assemblies in each adjustment mechanism, and the handles of the two drive assemblies are connected.

[0015] Among them, a plurality of elastic columns are arranged on one side of the upper jig close to the lower jig, and when the upper jig is buckled on the lower jig, the elastic columns press against the LED lamp board.

[0016] Wherein, the upper jig comprises a lower pressing plate and an upper pressing plate which are stacked, the lower pressing plate is located on a side close to the lower jig, and a first positioning hole is provided on the lower pressing plate;

[0017] The elastic column is located in the first positioning hole, and includes a main column, a sleeve, a spring and a cap. The cap is covered on one end of the sleeve, and the main column is inserted into the sleeve from the other end of the sleeve. The spring is located in the sleeve, and one end of the spring is fixed on the cap, and the other end of the spring is fixed on the main column. The other end of the main column extends out of the sleeve and extends from one end opening of the first positioning hole to press against the LED lamp board. The cap is located at the other end opening of the first positioning hole.

[0018] Among them, the pressing area is square, and the fixing areas connected to two adjacent edges of the pressing area are provided with the limit platforms, and the fixing areas connected to the other two adjacent edges of the pressing area are vacant areas, and the number of the adjustment mechanisms is two.

[0019] Wherein, a plurality of air holes are arranged on the pressing area.

[0020] The present application also provides a lamination method, comprising:

[0021] Place the LED light board on the pressing area of ​​the lower fixture, wherein the LED chip on the LED light board faces the pressing area;

[0022] The push plate is driven toward the pressing area by the driving assembly, so that the boss on the push plate contacts the LED light board on the pressing area, thereby pushing the LED light board to move until the LED light board contacts the limit platform on the lower fixture;

[0023] The upper fixture is buckled onto the lower fixture, and external force is applied to the upper fixture to press the LED light board.

[0024] The pressing device for the LED light board of the present application includes an upper jig, a lower jig, a mounting frame and an adjusting mechanism. The lower jig and the adjusting mechanism are fixed on the mounting frame. The lower jig is provided with a pressing area for placing the LED light board. The upper jig is buckled on the lower jig to press the LED light board, thereby flattening the light-emitting surface of the LED light board to improve the flatness of the LED light board, thereby improving the light-emitting effect. Secondly, the adjusting mechanism includes a push plate and a driving assembly for driving the push plate to move back and forth. By driving the push plate to drive the LED light board to move, the position of the LED light board can be adjusted, so that the LED light board can be accurately aligned with the upper jig, thereby avoiding damage to the electronic components on the LED light board during the pressing process of the upper jig. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a front structural schematic diagram of a pressing device provided in an embodiment of the present application;

[0026] Figure 2 is an exploded schematic diagram of a pressing device provided in an embodiment of the present application;

[0027] Figure 3 is a schematic diagram of the structure of the lower fixture provided in an embodiment of the present application;

[0028] Figure 4 It is a schematic diagram of the combination of the lower fixture and the adjustment mechanism provided in the embodiment of the present application;

[0029] Figure 5 is a schematic diagram of the structure of the adjustment mechanism provided in the embodiment of the present application;

[0030] Figure 6 It is a structural schematic diagram of an upper fixture provided in an embodiment of the present application;

[0031] Figure 7 yes Figure 6 An enlarged schematic diagram of the upper fixture at position C is shown;

[0032] Figure 8 is a schematic diagram of the bottom structure of the pressing device provided in an embodiment of the present application;

[0033] Fig. 9 is an exploded schematic diagram of an upper fixture provided in an embodiment of the present application;

[0034] Fig.10 is a schematic diagram of the structure of the elastic column provided in an embodiment of the present application;

[0035] Fig.11 yes Fig.10 The cross-sectional view of the elastic column along the EF direction is shown;

[0036] Fig.12 It is a flow chart of the pressing method of the pressing device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0038] In the COB packaging process, the production process of LED light boards is generally to first apply solder paste on the circuit board, then mount the LED chip on the solder paste, and then solidify the solder paste to obtain the LED light board. The pressing device for the LED light board of the embodiment of the present application mainly presses the LED light board before the solder paste of the LED light board is solidified, that is, after the mounting process, and presses the light-emitting surface of the LED light board to improve the flatness of the light-emitting surface of the LED light board.

[0039] See also Figures 1 to 11 In an embodiment of a pressing device for an LED light board of the present application, the pressing device is used to press the LED light board 10 to improve the flatness of the LED light board 10. The pressing device includes an upper jig 11, a lower jig 12, a mounting frame 13 and at least one adjustment mechanism 14.

[0040] like Figure 3 As shown, the lower fixture 12 includes a pressing area 121 for placing the LED light board 10 and a fixing area 122 surrounding the outer periphery of the pressing area 121, the fixing area 122 is used to be fixed to the mounting frame 13, and the upper fixture 11 is buckled on the lower fixture 12 to press the LED light board 10 on the pressing area 121. Optionally, the pressing area 121 and the fixing area 122 can be in the same plane, or the pressing area 121 can also be slightly raised relative to the fixing area 122, or the pressing area 121 can also be slightly recessed relative to the fixing area 122 to better accommodate the LED light board 10. It should be noted that if the pressing area 121 is recessed relative to the fixing area 122, the thickness of the LED light board 10 needs to be greater than the depth of the recess of the pressing area 121, so that the LED light board 10 protrudes.

[0041] Among them, at least one limit platform 123 is provided on the fixing area, and the edge line of the limit platform 123 is flush with the edge line of the pressing area 121, that is, they are roughly located on the same plane, and the height of the limit platform 123 is greater than the superimposed height of the LED light board 10 and the upper jig 11, which is used to limit the LED light board 10 and the upper jig 11 in the pressing area 121 to prevent the LED light board 10 and the upper jig 11 from shifting.

[0042] The fixed area 122 opposite to the limiting platform 123 is an empty area, that is, the fixed area 122 on the side opposite to the limiting platform 123 is in an empty state, and no limiting platform is arranged thereon. Each adjustment mechanism 14 is correspondingly arranged on an area of ​​the mounting frame 13 located on the same side as each empty area, that is, an adjustment mechanism 14 is arranged on an area of ​​the mounting frame 13 located on the same side as each empty area.

[0043] In some implementations, the pressing area 121 is square, and the fixing areas 122 connected to two adjacent edges of the pressing area 121 are provided with limiting platforms 123, and the fixing areas 122 connected to the other two adjacent edges of the pressing area 121 are vacant areas. Figure 4 As shown, each adjustment mechanism 14 is located on one side of a vacant area to adjust the position of the LED light board 10. More specifically, the two adjustment mechanisms 14 push the LED light board 10 to move in the X-axis direction and the Y-axis direction respectively to adjust the position of the LED light board 10 in the X-axis direction and the Y-axis direction.

[0044] The adjustment mechanism 14 is mainly used to adjust the position of the LED light board 10 and / or the upper fixture 11 on the pressing area 121 so that the LED light board 10 and the upper fixture 11 are accurately aligned. Figure 5 As shown, the adjustment mechanism 14 includes a push plate 141 and a driving assembly, the driving assembly is fixed on the area of ​​the mounting frame 13 on the same side as the vacant area, and the driving assembly is connected to the push plate 141 to drive the push plate 141 to move closer to or away from the pressing area 121. Further, the push plate 141 includes a first surface facing the pressing area 121 and a second surface facing away from the pressing area 121, and the push rod 142 can be directly fixedly connected to the second surface of the push plate 141, for example, by bolts; or, a through hole can be opened on the push plate 141, one end of the push rod 142 is a threaded end, and the threaded end passes through the through hole on the push plate 141 and is fixed by a nut, thereby fixing the push rod 142 to the push plate 141.

[0045] Among them, there is a boss 1411 on the first surface of the push plate 141. When the push plate 141 moves close to the pressing area 121, the boss 1411 contacts the LED light board 10 to drive the LED light board 10 to move, so that the position of the LED light board 10 can be adjusted so that the LED light board 10 and the upper fixture 11 are accurately aligned.

[0046] In some implementations, the driving assembly includes a push rod 142, a first connecting rod 143, a second connecting rod 144, a handle 145, and a base 146. The base 146 is fixed to the mounting frame 13, and a support member 147 for supporting the push rod 142 is provided on the base 146, wherein the support member 147 may be, for example, a hollow cylinder with two ends open, one end of the push rod 142 is connected to the push plate 141, and the other end of the push rod 142 is rotatably connected to the first connecting rod 143 after passing through the hollow cavity inside the support member 147, for example, it may be rotatably connected through a rotating shaft, the other end of the first connecting rod 143 is rotatably connected to one end of the second connecting rod 144, and one end of the second connecting rod 144 (i.e., the end connected to the first connecting rod 143) is fixedly connected to the handle 145, and the other end of the second connecting rod 144 is rotatably connected to the base 146. Thus, by fixing the handle 145 to one end of the second connecting rod 144 , the second connecting rod 144 can be rotated around the connection point with the base 146 by operating the handle 145 .

[0047] Therefore, when the second connecting rod 144 is rotated in the AB direction by the operating handle 145, the push rod 142 can be driven to move away from the pressing area 121, and when the second connecting rod 144 is rotated in the BA direction by the operating handle 145, the push rod 142 can be driven to move closer to the pressing area 121. When the push plate 141 moves closer to the pressing area 121, the push plate 141 contacts the LED light board 10 on the pressing area 121 to drive the LED light board 10 to move, thereby adjusting the position of the LED light board 10.

[0048] The length of the push plate 141 may be greater than the side length of the pressing area 121 , or be substantially the same as the side length of the pressing area 121 , or be substantially the same as the side length of the LED light board 10 .

[0049] It should be noted that when the LED light board 10 is placed on the pressing area 121, the light-emitting surface of the LED light board 10 is attached to the pressing area 121, and the back side of the LED light board 10, that is, the backlight side, faces the upper fixture 11. Therefore, the appearance shape of the upper fixture 11 needs to match the appearance shape of the back side of the LED light board 10. Various electronic components are usually arranged on the back side of the LED light board 10. Therefore, the upper fixture 11 needs to be arranged according to the distribution of the electronic components on the LED light board 10, for example, Figure 6 As shown, corresponding to the area where the electronic components are distributed, the upper jig 11 needs to have receiving grooves 111 so that when the upper jig 11 is buckled on the pressing area 121, these receiving grooves 111 can accommodate these electronic components to avoid the upper jig 11 from crushing the electronic components.

[0050] Therefore, before the upper jig 11 presses the LED light board 10, it is necessary to align the LED light board 10 and the upper jig 11, for example, the electronic components on the LED light board 10 must be accurately aligned with the corresponding receiving grooves of the upper jig 11. In the embodiment of the present application, the upper jig 11 is provided with a positioning column 112, and the lower jig 12 is provided with a positioning hole 124. When the upper jig 11 is buckled on the pressing area 121, the positioning column 112 of the upper jig 11 is inserted into the positioning hole 124, so that the upper jig 11 is fixed relative to the lower jig 12. That is to say, after the upper jig 11 is buckled on the pressing area 121, the position of the upper jig 11 is fixed. Therefore, the position of the LED light board 10 is adjusted by the adjustment mechanism 14 so that L The ED light board 10 is accurately aligned with the upper fixture 11. In some implementations, when the LED light board 10 touches the limit platform 123, the LED light board 10 is accurately aligned with the upper fixture 11, that is, the push plate 141 pushes the LED light board 10 toward the limit platform 123 until the LED light board 10 touches the limit platform 123 and can no longer move. Therefore, when the upper fixture 11 is pressed on the lower fixture 12, the LED light board 10 can be accurately aligned with the upper fixture 11. Through the action of the adjustment mechanism 14, the position of the LED light board 10 can be easily adjusted.

[0051] In some embodiments, the handle 145 of the driving assembly and the second connecting rod 144 are an integrally formed part, and the integrally formed part is substantially L-shaped, and the connecting portion between the first connecting member 143 and the second connecting member 144 is located at a corner of the integrally formed part.

[0052] In some embodiments, Figure 5As shown, the number of driving assemblies in each adjustment mechanism 14 can be two, and the two driving assemblies are respectively connected to the two ends of the push plate 141 to maintain the movement balance of the two ends of the push plate 141. The adjustment mechanism 14 also includes a synchronization rod 148, and the handles 145 of the two driving assemblies are connected by the synchronization rod 148 to achieve synchronous rotation.

[0053] In some embodiments, Figure 3 and Figure 8 As shown, the pressing area 121 includes a bearing surface 1211 for placing the LED light board 10 and a back surface 1212 opposite to the bearing surface 1211, and a heating module 15 is arranged on the back surface 1212 of the pressing area 121. During the pressing process, if the solder paste under the LED chip solidifies, it will be difficult to flatten the LED chip later. Therefore, in the embodiment of the present application, the heating module 15 is used to provide heat during the pressing process to prevent the solder paste under the LED chip from solidifying. The heating module 15 can be implemented, for example, by using a heating resistor.

[0054] Furthermore, a plurality of air holes 1213 may be provided on the pressing area 121, which is conducive to the heat of the heating module 15 entering the LED light board 10. Also, after pressing, when the LED light board 10 is left to cure, it is also conducive to the heat being emitted from the air holes 1213, thereby accelerating the curing.

[0055] In addition, in some embodiments, Figure 2 As shown, the pressing device may further include a support frame 16 , and the mounting frame 13 is fixed on the support frame 16 .

[0056] In some embodiments, Figure 4 and Figure 5As shown, the adjustment mechanism 14 may further include a fixing assembly 149, the fixing assembly 149 includes a fixing block 1491 and a bolt 1492, the fixing block 1491 is fixed on the mounting frame 13 and is located between the vacant area 122 and the base 146, threaded holes are provided on the fixing block 1491 and the push plate 141, the bolt 1492 is threadedly connected to the threaded holes on the fixing block 1491 and the push plate 141 in turn, thereby fixing the push plate 141. In an embodiment of the present application, after the push plate 141 is moved toward the pressing area 121 by operating the handle 145, if the external force on the handle 145 is removed during the pressing process, the handle 145 may move, thereby driving the push plate 141 to move, resulting in the push plate 141 being unable to limit the LED light board 10, which may cause the LED light board 10 to shift. Therefore, after the push plate 141 moves toward the pressing area 121, that is, after the push plate 141 presses the LED light board 10 between the limit platform 123 and the push plate 141, the bolt 1492 is threadedly connected to the threaded holes on the fixing block 1491 and the push plate 141 in turn, thereby fixing the push plate 141 to prevent the push plate 141 from moving at will during the pressing process.

[0057] There may be two or more fixing components 149 in each adjusting mechanism 14, which is not limited thereto.

[0058] See also Figure 6-Figure 7 as well as Figure 9-11 In some embodiments of the present application, a plurality of elastic columns 113 are provided on one side of the upper fixture 11 close to the lower fixture 12. When the upper fixture 11 is buckled on the lower fixture 12, the elastic columns 113 press against the LED light board 10, specifically, against the back of the LED light board 10. The elastic columns 113 are elastic, so that the elastic columns are retractable, so that the elastic columns 113 can adapt to the uneven back of the LED light board, and offset the height difference of the uneven places on the back of the LED light board 10 through their retractability, so that all the elastic columns 113 can contact the LED light board 10 as much as possible to achieve a better pressing effect.

[0059] Furthermore, the upper fixture 11 includes a stacked lower pressing plate 114 and an upper pressing plate 115, the lower pressing plate 114 is close to one side of the lower fixture 12, and a first positioning hole 1141 is provided on the lower pressing plate 114. The elastic column 113 is located in the first positioning hole 1141, and includes a main column 1131, a sleeve 1132, a spring 1133 and a cap 1134. Among them, the cap 1134 is covered on one end of the sleeve 1132, the main column 1131 is inserted into the sleeve 1132 from the other end of the sleeve 1132, the spring 1133 is located in the sleeve 1132, and one end of the spring 1133 is fixed on the cap 1134, the other end of the spring 1133 is fixed on the main column 1131, the other end 1131 of the main column extends out of the sleeve 1132 and extends from one end opening of the first positioning hole 1141 to press on the LED lamp board 10, and the cap 1134 is located at the other end opening of the first positioning hole 1141.

[0060] More specifically, the two end openings of the first positioning hole 1141 on the lower pressing plate 114 are respectively a first end opening and a second end opening, the first end opening is an opening close to the lower fixture 12 , and the second end opening is an opening close to the upper pressing plate 115 . Among them, the diameter of the first end opening is larger than the diameter of the main column 1131 and smaller than the diameter of the sleeve 1132, and the diameter of the second end opening can be larger than the diameter of the cap 1134. Therefore, during installation, the main column 1131 of the elastic column 113 can be inserted from the second end opening of the first positioning hole 1141 until the main column 1141 extends out of the first end opening of the first positioning hole 1141. Since the diameter of the sleeve 1132 is larger than the diameter of the first end opening, the sleeve 1132 is restricted in the first positioning hole 1141, and the cap 1134 is located at the second end opening of the first positioning hole 1141. In addition, the upper pressure plate 115 is located on the side of the second end opening of the first positioning hole 1141. Therefore, the elastic column 113 can be limited in the first positioning hole 1141 through the limiting effect of the upper pressure plate 115.

[0061] In addition, if Figures 9 to 11 As shown, a second positioning hole 1151 can also be provided on the upper pressure plate 115, the diameter of the second positioning hole 1141 is smaller than the diameter of the cover cap 1134, and a boss 1135 is provided on the cover cap 1134, and the boss 1135 is inserted into the second positioning hole 1151, so as to connect the upper pressure plate 115 and the lower pressure plate 114 together, so that the upper pressure plate 115 and the lower pressure plate 114 can be accurately aligned to prevent the two from shifting.

[0062] In order to facilitate the operation of the upper jig 11, an operating handle 1152 can be set on the upper pressing plate 115 to facilitate the operation of the upper jig 11, such as picking up or putting down the upper jig 11, or applying pressure to the upper jig 11 so that the upper jig 11 is pressed toward the lower jig 12.

[0063] The working process of the pressing device for LED light panels of the present application will be described in detail below.

[0064] After the LED chip is mounted on the circuit board of the LED light board 10 and before the solder paste is cured, the LED light board 10 is placed on the pressing area 121 of the lower jig 12, with the LED chip facing the pressing area 121 and the back of the LED light board 10 facing the upper jig 11, and then the heating module 15 is heated to prevent the solder paste on the LED light board 10 from curing. Then, the position of the LED light board 10 is adjusted, that is, the handles 145 of the two adjustment mechanisms 14 are pushed respectively through the synchronization rod 148 to drive the push plates 141 of the two adjustment mechanisms 14 to push the LED light board 10 along the X-axis direction and the Y-axis direction respectively, until the LED light board 10 respectively contacts the two limit platforms 123, and then the upper jig 11 is buckled on the lower jig 12. At this time, the elastic column 113 of the upper jig 11 is pressed on the LED light board 10, and the positioning column 113 of the upper jig 11 is inserted into the positioning hole 124 of the lower jig 12, wherein the LED light board 10 is pushed in the X-axis and Y-axis directions by utilizing the adjustment mechanism 14 until it contacts the corresponding limit platforms 123, so that the upper jig 11 can be buckled on the lower jig 12 so that the upper jig 11 and the LED light board 10 are accurately aligned, thereby preventing the upper jig 11 from pressing on the electronic components on the LED light board 10.

[0065] Afterwards, an external force is applied to the upper fixture 11 so that the elastic column 113 generates a greater elastic force on the LED light board 10 to press the LED light board 10. At this time, since the solder paste is not solidified, the thicker solder paste will be pressed down, so the uneven LED chip can be pressed flat. It should be noted that when pressing the LED light board 10, the extrusion of the solder paste should be based on the premise that it will not cause a short circuit in the LED chip, and different external forces can be applied to the upper fixture 11 according to actual needs.

[0066] Therefore, by using the pressing device for the LED light board of the embodiment of the present application, the flatness of the light-emitting surface of the LED light board can be improved, thereby improving the light-emitting effect.

[0067] See also Fig.12 The present application also provides a laminating method of the laminating device described in any of the above embodiments, comprising the following steps:

[0068] Step S121: placing the LED light board on the pressing area of ​​the lower fixture, wherein the LED chip on the LED light board is arranged facing the pressing area.

[0069] Step S122: The push plate is driven toward the pressing area by the driving assembly so that the boss on the push plate contacts the LED light board on the pressing area, thereby pushing the LED light board to move until the LED light board contacts the limit platform on the lower fixture.

[0070] Step S123: buckle the upper jig onto the lower jig, and apply external force to the upper jig to press the LED light board.

[0071] The above are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A pressing device for LED light board, characterized in that: The invention comprises an upper fixture, a lower fixture, a mounting frame and at least one adjustment mechanism; the lower fixture comprises a pressing area for placing an LED light board and a fixing area arranged around the periphery of the pressing area, the fixing area is fixed to the mounting frame, and the upper fixture is buckled on the lower fixture to press the LED light board; at least one limit platform is arranged on the fixing area, the edge line of the limit platform is flush with the edge line of the pressing area, and the fixing area opposite to the limit platform is an empty area, and each adjustment mechanism is correspondingly arranged on an area on the same side of the mounting frame as each empty area; the adjustment mechanism comprises a push plate and a drive assembly, and the drive assembly is fixed on The push plate is an area on the same side as the vacant area in the mounting frame, wherein the push plate includes a first surface facing the pressing area and a second surface facing away from the pressing area; the driving assembly is connected to the second surface of the push plate to drive the push plate to move closer to or away from the pressing area, and a boss is provided on the first surface of the push plate. When the push plate moves closer to the pressing area, the boss contacts the LED light board on the pressing area to push the LED light board to move, thereby adjusting the position of the LED light board; the pressing area includes a bearing surface for placing the LED light board and a back surface opposite to the bearing surface, and a heating module is provided on the back surface; The driving assembly includes a push rod, a first connecting rod, a second connecting rod, a handle and a base; the base is fixed on the mounting frame, and a support member for supporting the push rod is provided on the base, one end of the push rod is connected to the push plate, the other end of the push rod is rotatably connected to one end of the first connecting rod, the other end of the first connecting rod is rotatably connected to one end of the second connecting rod, the other end of the second connecting rod is rotatably connected to the base, and the handle is fixedly connected to the one end of the second connecting rod.

2. The pressing device according to claim 1, characterized in that: The handle and the second connecting rod are integrally formed.

3. The pressing device according to claim 1, characterized in that: The adjustment mechanism also includes a fixing assembly, which includes a bolt and a fixing block; the fixing block is fixed on the mounting frame and is located between the vacant area and the base, and threaded holes are provided on the fixing block and the push plate, and the bolts are threadedly connected with the threaded holes on the fixing block and the push plate in turn to fix the push plate.

4. The pressing device according to claim 1, characterized in that: There are two drive assemblies in each adjustment mechanism, and the handles of the two drive assemblies are connected.

5. The pressing device according to claim 1, characterized in that: A plurality of elastic columns are arranged on one side of the upper fixture close to the lower fixture. When the upper fixture is buckled on the lower fixture, the elastic columns press against the LED lamp board.

6. The pressing device according to claim 5, characterized in that: The upper jig includes a stacked lower pressing plate and an upper pressing plate, the lower pressing plate is located on a side close to the lower jig, and a first positioning hole is provided on the lower pressing plate; the elastic column is located in the first positioning hole, and includes a main column, a sleeve, a spring and a cap, the cap is covered on one end of the sleeve, the main column is inserted into the sleeve from the other end of the sleeve, the spring is located in the sleeve, and one end of the spring is fixed on the cap, and the other end of the spring is fixed on the main column, the other end of the main column extends out of the sleeve and extends from one end opening of the first positioning hole to press against the LED lamp board, and the cap is located at the other end opening of the first positioning hole.

7. The pressing device according to claim 1, characterized in that: The pressing area is square, and the fixing areas connected to two adjacent edges of the pressing area are provided with the limiting platforms, and the fixing areas connected to the other two adjacent edges of the pressing area are vacant areas, and the number of the adjusting mechanisms is two.

8. The pressing device according to claim 1, characterized in that: The pressing area is provided with a plurality of air holes.

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