Liquid crystal screen welding positioning device

Abstract

The application discloses a liquid crystal screen welding positioning device, which comprises a base plate, a positioning plate, a pressing plate, a cover plate and a pressing piece. The base plate is provided with a concave cavity. The positioning plate is covered on the base plate and is provided with a hollow part. The pressing plate is covered on the positioning plate and is provided with an avoiding hollow position. When the pressing plate is covered on the positioning plate, at least a part of the pressing plate is pressed above the hollow part. The cover plate is covered on the pressing plate. The pressing piece is arranged on the base plate and can be pressed on the top of the cover plate to press the cover plate, the pressing plate and the positioning plate. The liquid crystal screen welding positioning device can weld the liquid crystal screen with long pins and large number of pins on the circuit board with high quality and ensure the installation precision of the liquid crystal screen on the circuit board.

Description

Technical Field

[0001] This invention relates to a liquid crystal screen welding positioning device. Background Technology

[0002] LCD screens (such as those on paper shredders) need to be soldered onto circuit boards. To prevent the LCD screen from interfering with the components on the drive circuit board, the pins on the LCD screen are sometimes quite long, and there are also many pins. As a result, when the pins on the LCD screen are plugged into the circuit board, it is difficult to ensure that the length of each pin extending from the bottom of the circuit board is consistent due to the length of the pins and the number of pins. This can easily lead to the LCD screen tilting poorly after the pins are soldered, affecting the subsequent snap-fit ​​installation of the LCD screen.

[0003] Therefore, it is necessary to develop an auxiliary positioning device that can ensure that the protruding length of each pin on the LCD screen is consistent when it is plugged into the circuit board. Summary of the Invention

[0004] The purpose of this invention is to provide a liquid crystal screen welding positioning device to solve at least one of the above-mentioned technical problems.

[0005] This invention provides a liquid crystal screen welding positioning device, comprising:

[0006] The substrate has a cavity for accommodating the LCD screen circuit board, and an opening for inserting the LCD screen pins is provided on the bottom of the cavity.

[0007] A positioning plate is fitted onto a substrate, and the positioning plate has a cutout portion for accommodating the substrate of the LCD screen circuit board.

[0008] A pressure plate is fitted onto a positioning plate. The pressure plate has clearance slots. When the pressure plate is fitted onto the positioning plate, at least a portion of the pressure plate presses against the top of the clearance slots.

[0009] Cover plate, which closes onto the pressure plate to cover and avoid the cutout area; and

[0010] Multiple pressing components are provided on the substrate. The pressing components can press against the top of the cover plate to press the cover plate, pressure plate, and positioning plate.

[0011] In the liquid crystal screen welding and positioning device of the present invention, after all the pins of the liquid crystal screen are inserted into the circuit board, when it is necessary to weld the pins of the liquid crystal screen, the liquid crystal screen circuit board is snapped into a cavity housed in the substrate, and the pins of the liquid crystal screen are inserted into the openings at the bottom of the cavity. Then, a positioning plate is placed on the substrate. At this time, the base of the liquid crystal screen of the liquid crystal screen circuit board is housed in the hollow part. The positioning plate can prevent the liquid crystal screen of the liquid crystal screen circuit board from moving horizontally. Then, a pressure plate is placed on the positioning plate. The pressure plate can further prevent the liquid crystal screen of the liquid crystal screen circuit board from moving horizontally, and a part of the pressure plate can also prevent the base of the liquid crystal screen of the liquid crystal screen circuit board from moving vertically. Finally, a cover plate is placed on the substrate. The pressure plate further ensures that the LCD screen of the LCD circuit board cannot move vertically. Finally, the pressing component is pressed against the cover plate, thereby pressing the cover plate, pressure plate, and positioning plate onto the substrate. At this time, since the LCD screen of the LCD circuit board is positioned and pressed and fixed both horizontally and vertically, it can be ensured that the length of each pin on the LCD screen extending from the bottom of the circuit board is consistent. In this state, after the pins of the LCD screen are soldered, the LCD screen will not tilt, ensuring that the LCD screen can be smoothly snapped and installed on the product. The LCD screen soldering and positioning device of the present invention can solder LCD screens with long pins and a large number of pins onto the circuit board with high quality, ensuring the installation accuracy of the LCD screen on the circuit board.

[0012] Preferably, the pressing component includes a base, an adjusting bolt, a spring, and a pressing part. The base is disposed on the base plate, the adjusting bolt is screwed onto the base, the spring is sleeved on the adjusting bolt, and the pressing part is sleeved on the adjusting bolt and rotatably connected to the adjusting bolt. One end of the spring presses against the pressing part, and the other end of the spring presses against the nut of the adjusting bolt.

[0013] The pressing part can press against the top of the cover plate to tighten the cover plate, pressure plate, and positioning plate.

[0014] Therefore, when the cover plate is closed on the pressure plate, rotating the pressing part causes it to press against the cover plate. Under the action of the spring, the pressing part can press the cover plate, pressure plate, and positioning plate firmly onto the substrate, ensuring that the LCD screen part of the LCD circuit board is positioned and fixed in both the horizontal and vertical planes. After the soldering is completed, rotating the pressing part allows the cover plate, pressure plate, and positioning plate to be removed. Pressing and releasing the cover plate is very convenient. Moreover, when the overall height of the cover plate, pressure plate, and positioning plate increases due to the thickness of the LCD circuit board, the pressing part can still press against the cover plate to tighten the cover plate, pressure plate, and positioning plate due to the presence of the spring, thus making it suitable for LCD circuit boards of different heights.

[0015] Preferably, the opening includes a first opening, a second opening, and a third opening. The first opening and the second opening are used to insert the pins of the LCD screen circuit board, and the third opening is used to accommodate the soldering position of the wiring terminal of the LCD screen circuit board.

[0016] Therefore, after the LCD screen circuit board is positioned and fixed, the LCD screen pins can be soldered at the first and second openings, which is very convenient. The presence of the third opening can prevent the soldering positions of the LCD screen circuit board terminals from being crushed.

[0017] Preferably, the positioning plate is provided with a first clearance position and a second clearance position. The cutout portion includes a first cutout portion and a second cutout portion that are interconnected. The first cutout portion is square in shape, and the second cutout portion is triangular in shape. The first clearance position is located on the side wall of the first cutout portion, and the second clearance position is located on the side wall of the second cutout portion. The first clearance position and the second clearance position are respectively used to avoid the pins of the LCD screen circuit board.

[0018] The clearance opening is square in shape, and when the pressure plate is closed on the positioning plate, at least a part of the pressure plate can press on the top of the second clearance opening.

[0019] Therefore, the first and second cutouts can prevent the base of the LCD screen of the LCD circuit board from moving on the horizontal plane. The first and second clearance positions can provide clearance space for the pins of the LCD circuit board, preventing the pins of the LCD circuit board from being pressed by the side wall of the positioning plate and causing defects. At the same time, the square-shaped clearance cutouts can prevent the LCD screen of the LCD circuit board from moving on the horizontal plane. A part of the pressure plate can press on part of the base of the LCD screen of the LCD circuit board, preventing the LCD screen of the LCD circuit board from moving in the vertical direction.

[0020] Preferably, the side wall of the clearance area is provided with a third clearance area for avoiding the pins of the LCD screen circuit board.

[0021] Therefore, the third clearance position can provide clearance space for the pins of the LCD screen circuit board, preventing the pins of the LCD screen circuit board from being pressed by the side wall of the pressure plate and causing defects.

[0022] Preferably, a recessed first clearance portion is provided between two adjacent sidewalls of the cavity.

[0023] Therefore, during the installation or removal of the LCD screen circuit board, the presence of the first clearance part allows the circuit board portion of the LCD screen circuit board to be smoothly snapped into and removed from the recess on the substrate. Moreover, it can prevent the corner of the circuit board portion of the LCD screen circuit board from being damaged during the installation and removal process, thus preventing defects.

[0024] Preferably, the four corners of the first hollow portion are each provided with a concave second clearance portion.

[0025] Therefore, the presence of the second clearance part can prevent the corners of the LCD screen and its base on the LCD circuit board from being damaged during the assembly and disassembly of the positioning plate, thus preventing defects.

[0026] Preferably, each of the four corners of the clearance section is provided with a concave third clearance section.

[0027] Therefore, the presence of the third clearance part can prevent the corner of the LCD screen circuit board from being damaged during the assembly and disassembly of the pressure plate, thus preventing defects.

[0028] Preferably, it also includes at least two positioning posts, the bottom of which is located at a corner of the inner bottom of the cavity. The at least two positioning posts are located at two opposite corners of the inner bottom of the cavity. The positioning plate is provided with at least two first through holes adapted to the positioning posts, the pressure plate is provided with at least two second through holes adapted to the positioning posts, and the cover plate is provided with at least two third through holes adapted to the positioning posts. The positioning posts can be inserted into the first through holes, the second through holes, and the third through holes in sequence.

[0029] Therefore, when installing the positioning plate, simply align the first through hole on the positioning plate with the positioning post on the substrate and fit it onto the positioning post to accurately cover the positioning plate on the substrate. When installing the pressure plate, simply align the second through hole on the pressure plate with the positioning post on the substrate and fit it onto the positioning post to accurately cover the pressure plate on the positioning plate. When installing the cover plate, simply align the third through hole on the cover plate with the positioning post on the substrate and fit it onto the positioning post to accurately cover the cover plate on the pressure plate. The presence of the positioning post on the substrate allows the positioning plate, pressure plate, and cover plate to be installed on the substrate quickly and accurately in sequence.

[0030] Preferably, there are two positioning posts, two first perforations, two second perforations, and two third perforations, with the two positioning posts located at two opposite corners at the bottom of the concave cavity.

[0031] Therefore, the two positioning posts are arranged diagonally at the bottom of the cavity to ensure that the positioning plate, pressure plate, and cover plate will not move on the horizontal plane. This ensures that the LCD screen part of the LCD circuit board will not move on the horizontal plane. The positioning plate can be accurately fitted onto the substrate by aligning the two first through holes on the positioning plate with the two positioning posts and fitting them onto the positioning posts. Similarly, the pressure plate can be accurately fitted onto the positioning plate by aligning the two second through holes on the pressure plate with the two positioning posts and fitting them onto the positioning posts. Finally, the cover plate can be accurately fitted onto the pressure plate by aligning the two third through holes on the cover plate with the two positioning posts and fitting them onto the positioning posts.

[0032] Preferably, there are two positioning posts, two first perforations, two second perforations, and four third perforations. The two positioning posts are located at two opposite corners at the bottom of the cavity, and the four third perforations are arranged in a square pattern.

[0033] Therefore, the two positioning posts are arranged diagonally at the bottom of the cavity to ensure that the positioning plate, pressure plate, and cover plate will not move on the horizontal plane. The four third perforations arranged in a square shape allow the cover plate to be fitted onto the two positioning posts through two of the third perforations from both sides, which is very convenient. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of the LCD screen circuit board positioned and installed by the LCD screen welding positioning device of the present invention.

[0035] Figure 2 for Figure 1 A 3D view of the LCD screen circuit board shown;

[0036] Figure 3 This is a schematic diagram of the structure of a liquid crystal screen welding positioning device according to one embodiment of the present invention;

[0037] Figure 4 for Figure 3 The diagram shows the disassembled structure of the LCD screen welding positioning device.

[0038] Figure 5 for Figure 4 The enlarged structural diagram of point A in the LCD screen welding positioning device shown. Detailed Implementation

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0040] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0041] Figure 1 and Figure 2The diagram schematically illustrates the structure of the LCD screen circuit board positioned and installed by the LCD screen welding positioning device of the present invention.

[0042] See Figure 1 and Figure 2 The LCD screen circuit board 10 includes a circuit board 101 and an LCD screen 102 (such as the LCD screen on a paper shredder). In order to prevent the substrate 1021 of the LCD screen 102 from interfering with the components on the circuit board 101, the length of the multiple first pins 10211 and multiple second pins 10212 on the side of the substrate 1021 of the LCD screen 102 is relatively long. The first pins 10211 are located on the side of the substrate 1021, and the second pins 10212 are located on the side of the protrusion 10213 of the substrate 1021 that protrudes from the LCD screen 102.

[0043] Figures 3 to 5 The structure of a liquid crystal screen welding positioning device according to one embodiment of the present invention is shown schematically.

[0044] See Figures 3 to 5 The LCD screen welding and positioning device includes a substrate 1, a positioning plate 2, a pressure plate 3, a cover plate 4, a pressing component 5, and a positioning post 6.

[0045] See Figure 3 The cover plate 4, pressure plate 3, and positioning plate 2 are stacked on the base plate 1 from top to bottom. The pressing component 5 is installed on the base plate 1 and can press against the top of the cover plate 4 to press the cover plate 4, pressure plate 3, and positioning plate 2 tightly.

[0046] See Figure 4 A cavity 11 is formed on the substrate 1, and the cavity 11 is used to accommodate Figure 2 The circuit board 101 of the LCD screen circuit board 10 shown has openings formed on the inner bottom of the cavity 11. The openings include a first opening 12, a second opening 13, and a third opening 14. The first opening 12, the second opening 13, and the third opening 14 are all rectangular in shape. The first opening 12 is used for insertion. Figure 2 The multiple first pins 10211 shown, and the second opening 13 are for insertion. Figure 2 The multiple second pins 10212 shown, and the third opening 14 are used to accommodate... Figure 2 The soldering position 1012 of the wiring terminal 1011 of the LCD circuit board 10 shown can be used to solder the LCD pins at the first opening 12 and the second opening 13 on the back of the substrate 1 after the LCD circuit board is positioned and fixed. This is very convenient. The presence of the third opening 14 can prevent the soldering position of the wiring terminal of the LCD circuit board from being crushed.

[0047] See Figure 4A recessed first clearance portion 111 is formed between two adjacent sidewalls of the cavity 11. The first clearance portion 111 can be formed by forming a cylindrical recess at the corner between two adjacent sidewalls of the cavity 11. During the installation or removal of the LCD screen circuit board, the presence of the first clearance portion 111 allows the circuit board portion of the LCD screen circuit board to be smoothly inserted into and removed from the cavity 11 on the substrate 1. Moreover, it can prevent the corner of the circuit board portion of the LCD screen circuit board from being damaged during the installation and removal process.

[0048] See Figure 4 In this embodiment, there are two positioning posts 6. The bottom of one positioning post 6 is fixed at one corner of the inner bottom of the cavity 11, and the bottom of the other positioning post 6 is fixed at another corner of the inner bottom of the cavity 11. The two positioning posts 6 are located at two opposite corners of the inner bottom of the cavity 11. The top of the positioning post 6 is conical to facilitate the connection of the positioning plate 2, the pressure plate 3, and the cover plate 4. In other embodiments, there can be three positioning posts 6, with three positioning posts 6 installed at three corners of the inner bottom of the cavity 11, and two positioning posts 6 located at two opposite corners of the inner bottom of the cavity 11. In other embodiments, there can be four positioning posts 6, with four positioning posts 6 installed at four corners of the inner bottom of the cavity 11.

[0049] See Figure 4 The positioning plate 2 covers the base plate 1, and the positioning plate 2 has a hollowed-out portion 21 formed on it, which is used to accommodate... Figure 2 The shape of the cutout portion 21 of the substrate 1021 of the LCD screen 102 shown is adapted to the shape of the substrate 1021 of the LCD screen 102.

[0050] See Figure 4 The positioning plate 2 has a first clearance position 22 and a second clearance position 23 formed on it. The hollow part 21 includes a first hollow part 211 and a second hollow part 212 that are interconnected. The first hollow part 211 and the second hollow part 212 are used to accommodate the base of the LCD screen of the LCD screen circuit board. The first hollow part 211 is square in shape. The shape of the first hollow part 211 is similar to that of the LCD screen circuit board. Figure 2 The shape of the LCD screen 102 on the LCD circuit board 10 shown is adapted to the shape of the LCD screen 102. The second cutout portion 212 is triangular in shape, and the shape of the second cutout portion 212 is consistent with... Figure 2 The shape of the protrusion 10213 of the substrate 1021 protruding from the liquid crystal screen 102 is adapted to the shape of the first clearance position 22, which is formed by the indentation of the side wall of the first hollow portion 211. The first clearance position 22 is used to avoid Figure 2 The multiple first pins 10211 shown have a second clearance position 23 formed by the recess of the side wall of the second cutout portion 212. The second clearance position 23 is used to avoid... Figure 2The multiple second pins 10212 shown; the positioning plate 2 can prevent the LCD screen and its base of the LCD circuit board from moving on the horizontal plane, that is, the first cutout portion 211 and the second cutout portion 212 can prevent the LCD screen and its base of the LCD circuit board from moving on the horizontal plane, and the first clearance position 22 and the second clearance position 23 can provide clearance space for the pins of the LCD circuit board, preventing the pins of the LCD circuit board from being pressed by the side wall of the positioning plate 2 and causing defects.

[0051] See Figure 4 In this embodiment, the positioning plate 2 has two first through holes 24 that are adapted to the positioning posts 6. When installing the positioning plate 2, the positioning plate 2 can be accurately covered on the substrate 1 by aligning the two first through holes 24 on the positioning plate 2 with the two positioning posts 6 on the substrate 1 and fitting them onto the positioning posts 6.

[0052] See Figure 4 The four corners of the first hollow part 211 are respectively formed with concave second relief parts 2111. The second relief parts 2111 can be formed by forming a columnar concave part at the four corners of the first hollow part 211. The presence of the second relief parts 2111 can prevent the corners of the LCD screen and its base of the LCD screen circuit board from being damaged during the assembly and disassembly of the positioning plate 2, causing defects.

[0053] See Figure 4 The pressure plate 3 covers the positioning plate 2. The pressure plate 3 has a square-shaped clearance cutout 31 formed on it. This clearance cutout 31 is used to accommodate the LCD screen of the LCD circuit board. The shape of the clearance cutout 31 is similar to... Figure 2 The shape of the LCD screen 102 on the LCD circuit board 10 shown is adapted to avoid the cutout 31, which can prevent the LCD screen on the LCD circuit board from moving on the horizontal plane.

[0054] See Figure 4 When the pressure plate 3 is closed on the positioning plate 2, at least a portion of the pressure plate 3 will press against the second hollow portion 212 on the positioning plate 2. In this way, during use, a portion of the pressure plate 3 can press against... Figure 2 The protrusion 10213 of the substrate 1021 shown protrudes from the protrusion 10213 of the liquid crystal screen 102 to prevent the liquid crystal screen and its substrate of the liquid crystal screen circuit board from moving longitudinally.

[0055] See Figure 4 A third clearance position 311 is formed on the side wall of the clearance position 31, and the third clearance position 311 is used to avoid Figure 2 The multiple first pins 10211 are shown.

[0056] See Figure 4In this embodiment, the pressure plate 3 has two second through holes 32 that are adapted to the positioning posts 6. When installing the pressure plate 3, the two second through holes 32 on the pressure plate 3 are aligned with the two positioning posts 6 on the base plate 1 and the pressure plate 3 is fitted onto the positioning posts 6 to accurately cover the positioning plate 2.

[0057] See Figure 4 The four corners of the clearance cutout 31 are respectively formed with concave third clearance parts 312. The third clearance parts 312 can be formed by forming a columnar recess at the four corners of the clearance cutout 31. The presence of the third clearance parts 312 can prevent the corners of the LCD screen of the LCD screen circuit board from being damaged during the assembly and disassembly of the pressure plate 3, causing defects.

[0058] See Figure 4 The cover plate 4 is placed on the pressure plate 3 to cover the clearance cutout 31 on the pressure plate 3. The cover plate 4 can further ensure that the LCD screen of the LCD circuit board cannot move vertically.

[0059] See Figure 4 In this embodiment, the cover plate 4 has four third through holes 41 formed on it. The four third through holes 41 are arranged in a square. The two third through holes 41 on one diagonal are adapted to the two positioning posts 6, and the two third through holes 41 on the other diagonal are also adapted to the two positioning posts 6. In this way, the cover plate 4 can be fitted onto the two positioning posts 6 on the substrate 1 through the two third through holes 41 from both sides, which is very convenient. When installing the cover plate 4, simply align the two third through holes 41 on the cover plate 4 with the two positioning posts 6 on the substrate 1 and fit the cover plate 4 onto the positioning posts 6 to accurately cover the pressure plate 3. In other embodiments, the number of third through holes 41 can also be two, and the positions of the two third through holes 41 can be adapted to the two positioning posts 6.

[0060] See Figure 3 The two positioning posts 6 on the substrate 1 can quickly and accurately install the positioning plate 2, pressure plate 3, and cover plate 4 onto the substrate 1 in sequence.

[0061] See Figure 4 and Figure 5The pressing component 5 is mounted on the base plate 1. The pressing component 5 includes a base 51, an adjusting bolt 52, a spring 53, and a pressing part 54. The base 51 is fixed on the base plate 1. The adjusting bolt 53 is screwed onto the top of the base 51. The spring 53 is sleeved on the adjusting bolt 52. The pressing part 54 is also sleeved on the adjusting bolt 52. The pressing part 54 is rotatably connected to the adjusting bolt 52, that is, the pressing part 54 can rotate around the adjusting bolt 53. One end of the spring 53 presses against the pressing part 54, and the other end of the spring 53 presses against the nut of the adjusting bolt 52. The spring 53 is in a compressed state. When the positioning plate 2, the pressure plate 3, and the cover plate 4 are installed on the base plate 1 in sequence, the pressing part 54 is rotated so that the pressing part 54 presses against the top of the cover plate 4. Under the elastic force of spring 53, the pressing part 54 can press the cover plate 4, pressure plate 3, and positioning plate 2 onto the substrate 1, ensuring that the LCD screen of the LCD circuit board is positioned and fixed in both the horizontal and vertical directions. After the pins of the LCD screen are soldered, the pressing part 54 is rotated to separate the pressing part 54 from the cover plate 4. At this time, the cover plate 4, pressure plate 3, and positioning plate 2 can be removed. Pressing and releasing the cover plate 4 is very convenient. Moreover, when the overall height of the cover plate 4, pressure plate 3, and positioning plate 2 increases due to the thickness of the LCD circuit board, the pressing part 54 can still press against the cover plate 4 to tighten the cover plate 4, pressure plate 3, and positioning plate 2 due to the presence of spring 53, thus making it suitable for LCD circuit boards of different heights.

[0062] See Figure 5 To facilitate the rotation of the pressing part 54, a toggle post 541 is formed on the pressing part 54. By moving the toggle post 541, the pressing part 54 can be pressed onto the cover plate 4 or separated from the cover plate 4, which is very convenient. When the overall height of the cover plate 4, pressure plate 3, and positioning plate 2 increases due to the thickness of the LCD screen circuit board, the toggle post 541 can be pulled up first, and then the toggle post 541 can be moved to press the pressing part 54 onto the cover plate 4.

[0063] See Figure 3 and Figure 4 In this embodiment, there are four pressing members 5. The four pressing members 5 are distributed on the upper surface of the substrate 1 near the four corners. In this way, the four pressing members 5 can press the cover plate 4, the pressure plate 3, and the positioning plate 2 onto the substrate 1 in a balanced manner.

[0064] See Figure 2 When assembling the circuit board 101 and the LCD screen 102 of the LCD screen circuit board 10 together, first connect all the first pins 10211 and all the second pins 10212 of the LCD screen 102 to the circuit board 102 respectively. (Refer to...) Figure 4The circuit board 101 of the LCD screen circuit board 10 is snapped into the cavity 11 on the substrate 1, so that multiple first pins 10211 on the LCD screen 102 are inserted into the first openings 12 in the cavity 11, and multiple second pins 10212 on the LCD screen 102 are inserted into the second openings 13 in the cavity 11. The soldering positions 1012 of the terminals 1011 of the LCD screen circuit board 10 are accommodated in the third openings 14 in the cavity 11. The substrate 1 can prevent the circuit board 101 of the LCD screen circuit board 10 from moving on the horizontal plane. Then, the two first through holes 24 on the positioning plate 2 are aligned with the two positioning posts 6 respectively and the positioning plate 2 is fitted onto the positioning posts 6 to accurately cover the substrate 1. At this time, the LCD screen 102 of the LCD screen circuit board 10... The base 1021 is housed in the hollow portion 21. The positioning plate 2 can prevent the LCD screen 102 of the LCD circuit board 10 from moving on the horizontal plane. Then, the two second through holes 32 on the pressure plate 3 are respectively aligned with the two positioning posts 6 and fitted onto the positioning posts 6, so that the pressure plate 3 is accurately covered on the positioning plate 2. At this time, a part of the pressure plate 3 will press on the protrusion 10213 of the base 1021 of the LCD screen 102 of the LCD circuit board 10. The pressure plate 3 can further prevent the LCD screen 102 of the LCD circuit board 10 from moving on the horizontal plane, and also prevent the LCD screen 102 and its base 1021 of the LCD circuit board 10 from moving vertically. Then, the two third through holes 41 on the cover plate 4 are respectively aligned with the two positioning posts 6. Positioning post 6 is fitted onto positioning post 6, thereby precisely covering cover plate 4 onto pressure plate 3. Cover plate 4 further ensures that LCD screen 102 of LCD circuit board 10 cannot move vertically. At this time, the actuating post 541 on each of the four pressing parts 5 is turned, and the pressing part 54 of the pressing part 5 presses against cover plate 4. Under the elastic force of spring 53, the pressing part 54 can press cover plate 4, pressure plate 3, and positioning plate 2 tightly onto substrate 1. At this time, since LCD screen 102 of LCD circuit board 10 is positioned and pressed and fixed in both horizontal and vertical directions, it can be ensured that the length of all first pins 10211 on LCD screen 102 extending from the bottom of circuit board 101 of LCD circuit board 10 is consistent, ensuring that LCD circuit... All the second pins 10212 on the LCD screen 102 of board 10 extend from the bottom of the circuit board 101 of the LCD screen circuit board 10 to the same length. In this state, all the first pins 10211 and all the second pins 10212 of the LCD screen 102 are soldered at the first opening 12 and the second opening 13 on the back of the substrate 1, respectively. After the soldering is completed, the LCD screen 102 of the LCD screen circuit board 10 will not tilt, ensuring that the LCD screen 102 can be smoothly snapped onto the product. The LCD screen soldering positioning device of the present invention can solder LCD screens with long pins and a large number of pins onto the circuit board with high quality, ensuring the installation accuracy of the LCD screen on the circuit board. After the soldering is completed, the toggle posts 541 on the four pressing parts 5 are turned respectively.After separating the pressing parts 54 on all four pressing parts 5 from the cover plate 4, remove the cover plate 4, pressure plate 3, and positioning plate 2 in sequence, and then remove the assembled LCD screen circuit board 10 from the substrate 1.

[0065] The above descriptions are merely some embodiments of the present invention, intended to illustrate the technical means of the present invention, and are not intended to limit the technical scope of the present invention. Any obvious improvements made to the present invention by those skilled in the art in conjunction with existing common knowledge fall within the protection scope of the present invention.

Claims

1. A liquid crystal screen welding positioning device, characterized in that, include: A substrate, wherein the substrate has a cavity for accommodating a liquid crystal display circuit board, and an opening for inserting liquid crystal display pins is provided on the bottom inner part of the cavity. A positioning plate is fitted onto a substrate. The positioning plate has a cutout portion for accommodating the substrate of the LCD screen circuit board. The positioning plate has a first clearance position and a second clearance position. The cutout portion includes a first cutout portion and a second cutout portion that are interconnected. The first cutout portion is square in shape and the second cutout portion is triangular in shape. The first clearance position is located on the side wall of the first cutout portion and the second clearance position is located on the side wall of the second cutout portion. The first clearance position and the second clearance position are respectively used to avoid the pins of the LCD screen circuit board. A pressure plate is provided on a positioning plate. The pressure plate has a clearance cutout. When the pressure plate is closed on the positioning plate, at least a part of the pressure plate presses on the cutout. The clearance cutout is square in shape and is used to accommodate the LCD screen of the LCD screen circuit board. When the pressure plate is closed on the positioning plate, at least a part of the pressure plate can press on the second cutout. A cover plate that fits onto a pressure plate to cover and avoid the cutout area; and Multiple pressing components are provided on the substrate and can press against the top of the cover plate to tighten the cover plate, pressure plate, and positioning plate.

2. The LCD screen welding positioning device according to claim 1, characterized in that, The pressing component includes a base, an adjusting bolt, a spring, and a pressing part. The base is disposed on the base plate, the adjusting bolt is screwed onto the base, the spring is sleeved on the adjusting bolt, and the pressing part is sleeved on the adjusting bolt and rotatably connected to the adjusting bolt. One end of the spring presses against the pressing part, and the other end of the spring presses against the nut of the adjusting bolt. The pressing part can press against the top of the cover plate to tighten the cover plate, pressure plate, and positioning plate.

3. The LCD screen welding positioning device according to claim 1, characterized in that, The opening includes a first opening, a second opening, and a third opening. The first opening and the second opening are used to insert the pins of the LCD screen circuit board, and the third opening is used to accommodate the soldering position of the wiring terminal of the LCD screen circuit board.

4. The LCD screen welding positioning device according to claim 1, characterized in that, The side wall of the clearance cutout is provided with a third clearance position for avoiding the pins of the LCD screen circuit board.

5. The LCD screen welding positioning device according to claim 1, characterized in that, The cavity has a recessed first clearance portion between two adjacent sidewalls.

6. The LCD screen welding positioning device according to claim 4, characterized in that, The four corners of the first hollowed-out portion are respectively provided with concave second clearance portions.

7. The LCD screen welding positioning device according to any one of claims 1 to 6, characterized in that, It also includes at least two positioning posts, the bottom of which is located at the corner of the inner bottom of the cavity. The at least two positioning posts are located at two opposite corners of the inner bottom of the cavity. The positioning plate is provided with at least two first through holes adapted to the positioning posts, the pressure plate is provided with at least two second through holes adapted to the positioning posts, and the cover plate is provided with at least two third through holes adapted to the positioning posts. The positioning posts can be inserted into the first through holes, the second through holes, and the third through holes in sequence.

8. The LCD screen welding positioning device according to claim 7, characterized in that, The number of positioning posts, first perforation, second perforation, and third perforation is two each, with the two positioning posts located at two opposite corners at the bottom of the concave cavity.

9. The LCD screen welding positioning device according to claim 7, characterized in that, The number of positioning posts, first perforations, and second perforations are all two, and the number of third perforations is four. The two positioning posts are located at two opposite corners at the bottom of the concave cavity, and the four third perforations are arranged in a square.

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