Screen pin welding positioning device

Abstract

The utility model discloses a screen pin welding positioning device which comprises a bottom plate, a limiting plate, a pressing plate, a covering plate and a pressing piece, the bottom plate is provided with a containing cavity, the limiting plate covers the bottom plate, the limiting plate is provided with a hollowed-out position, the pressing plate covers the limiting plate, the pressing plate is provided with a screen containing position, and when the pressing plate covers the limiting plate, the screen containing position is located in the containing cavity. At least one part of the pressing plate is pressed above the hollowed-out position, the covering plate covers the pressing plate, the pressing pieces are arranged on the bottom plate, the four pressing pieces are distributed at the positions, close to the four corners, of the upper surface of the bottom plate, and the pressing pieces can abut against the top of the covering plate so as to press the covering plate, the pressing plate and the limiting plate. According to the screen pin welding and positioning device, the screen with longer pins and more pins can be welded on the circuit board with high quality, and the mounting precision of the screen on the circuit board is ensured.

Description

Technical Field

[0001] The utility model relates to a screen pin welding positioning device. Background Art

[0002] The screen (such as the LCD screen on a paper shredder) needs to be soldered to a circuit board. In order to prevent the screen from interfering with the components on the driver circuit board, the length of the pins on the screen is sometimes longer, and the number of pins on the screen is also larger. In this case, when the pins on the screen are plugged into the driver circuit board, due to the longer pins and the larger number of pins, it is difficult to ensure that the length of each pin on the screen extending from the bottom of the circuit board remains consistent when plugged into the circuit board. This will cause the screen to easily tilt after the pins of the screen are soldered, affecting the subsequent connection of the screen to the product. Utility Model Content

[0003] The utility model aims to provide a screen pin welding positioning device.

[0004] The utility model provides a screen pin welding positioning device, comprising a base plate, a limiting plate, a pressing plate, a covering plate and four clamping members, the base plate is provided with a accommodating cavity for accommodating a circuit board of a screen assembly, the inner bottom of the accommodating cavity is provided with openings for inserting pins of the screen assembly, the limiting plate is covered on the base plate, the limiting plate is provided with a hollow position for accommodating a base of a screen of the screen assembly, the pressing plate is covered on the limiting plate, the pressing plate is provided with a screen accommodating position, the four corner positions of the screen accommodating position are respectively provided with concave avoidance portions A, when the pressing plate is covered on the limiting plate, at least a portion of the pressing plate is pressed above the hollow position, the covering plate is covered on the pressing plate to cover the screen accommodating position, the clamping member is provided on the base plate, the four clamping members are distributed on the upper surface of the base plate near the four corner positions, the clamping member can be pressed against the top of the covering plate to clamp the covering plate, the pressing plate and the limiting plate.

[0005] The screen pin welding positioning device of the present invention, after all the pins of the screen are plugged into the circuit board, when it is necessary to weld the pins of the screen, the circuit board of the screen assembly is clamped and accommodated in the accommodating cavity on the bottom plate, and the pin part of the screen is inserted into the opening on the bottom of the accommodating cavity, and then the limiting plate is covered on the bottom plate. At this time, the base of the screen of the screen assembly is accommodated in the hollow position, and the limiting plate can prevent the screen of the screen assembly from moving on the horizontal plane. Then the pressing plate is covered on the limiting plate, and the pressing plate can further prevent the screen of the screen assembly from moving on the horizontal plane. A part of the pressing plate can also prevent the base of the screen of the screen assembly from moving in the longitudinal direction. Then the covering plate is covered on the pressing plate to further ensure that the screen of the screen assembly cannot move in the longitudinal direction. Finally, The four pressing parts are respectively pressed against the covering plate to press the covering plate, the pressing plate and the limiting plate against the bottom plate. At this time, since the screen of the screen assembly is positioned, pressed and fixed in the horizontal plane and in the vertical direction, it can ensure that the length of each pin on the screen extending from the bottom of the circuit board remains consistent. In this state, after the pins of the screen are welded, the screen will not tilt, ensuring that the screen can be smoothly snapped into and installed on the product later. In addition, the existence of the avoidance parts A at the four corners of the screen accommodating position can prevent the corners of the screen of the screen assembly from being damaged during the assembly and disassembly process, causing defects. The screen pin welding positioning device of the utility model can weld screens with longer pins and a larger number of pins on the circuit board with high quality, thereby ensuring the installation accuracy of the screen on the circuit board.

[0006] Preferably, the pressing member comprises a base, an adjusting bolt, a spring and a pressing portion, the base is arranged on the bottom plate, the adjusting bolt is screwed on the base, the spring is sleeved on the adjusting bolt, the pressing portion is sleeved on the adjusting bolt and is rotatably connected to the adjusting bolt, one end of the spring presses on the pressing portion, and the other end of the spring presses on the nut of the adjusting bolt.

[0007] The pressing part can be pressed against the top of the covering plate to press the covering plate, the pressing plate and the limiting plate.

[0008] Therefore, when the covering plate is covered on the pressing plate, the pressing part is rotated to press the pressing part against the covering plate. Under the action of the spring, the pressing part can press the covering plate, the pressing plate and the limiting plate against the bottom plate to ensure that the screen part of the screen assembly is positioned and fixed in the horizontal plane and in the vertical direction. After welding is completed, the covering plate, the pressing plate and the limiting plate can be removed by rotating the pressing part. It is very convenient to press and release the covering plate. Moreover, when the overall height of the covering plate, the pressing plate and the limiting plate increases due to the thickness of the screen assembly, due to the presence of the spring, the pressing part can still press on the covering plate to press the covering plate, the pressing plate and the limiting plate, so that it can be suitable for screen assemblies of different heights.

[0009] Preferably, the openings include opening A, opening B and opening C. Opening A and opening B are respectively used to insert the pins of the screen assembly, and opening C is used to accommodate the welding position of the connection terminal of the screen assembly.

[0010] Therefore, after the screen assembly is positioned and fixed, the pins of the screen can be welded at openings A and B, which is very convenient. The presence of opening C can prevent the welding position of the terminal of the screen assembly from being crushed.

[0011] Preferably, the limiting plate is provided with an avoidance position A and an avoidance position B, the hollow position includes a hollow position A and a hollow position B which are interconnected, the hollow position A is square-shaped, the hollow position B is triangular-shaped, the avoidance position A is arranged on the side wall of the hollow position A, the avoidance position B is arranged on the side wall of the hollow position B, and the avoidance position A and the avoidance position B are respectively used to avoid the pins of the screen component.

[0012] The screen accommodating position is square in shape. When the pressing plate is covered on the limiting plate, at least a portion of the pressing plate can be pressed above the hollow position B.

[0013] Therefore, the hollow positions A and B can prevent the base of the screen of the screen assembly from moving in the horizontal plane, and the avoidance positions A and B can provide avoidance space for the pins of the screen assembly to prevent the pins of the screen assembly from being pressed by the side walls of the limiting plate and causing defects. At the same time, the square-shaped screen accommodating position can prevent the screen of the screen assembly from moving in the horizontal plane, and a part of the pressing plate can be pressed on part of the base of the screen of the screen assembly to prevent the screen of the screen assembly from moving in the longitudinal direction.

[0014] Preferably, a side wall of the screen accommodating position is provided with an avoidance position C for avoiding pins of the screen assembly.

[0015] Therefore, the avoidance position C can provide avoidance space for the pins of the screen assembly to prevent the pins of the screen assembly from being pressed by the side wall of the pressing plate and causing defects.

[0016] Preferably, a concave avoidance portion B is provided between two adjacent side walls of the accommodating cavity.

[0017] Therefore, during the process of installing or removing the screen assembly, the presence of the avoidance portion B allows the circuit board portion of the screen assembly to be smoothly snapped into and removed from the accommodating cavity on the bottom plate, and can also prevent the corners of the circuit board portion of the screen assembly from being damaged during the installation and removal process.

[0018] Preferably, the four corners of the hollow position A are respectively provided with concave avoidance portions C.

[0019] Therefore, the existence of the avoidance portion C can prevent the corners of the screen and the base of the screen assembly from being damaged and causing defects during the assembly and disassembly process of the limiting plate.

[0020] Preferably, it also includes at least two positioning columns, the bottom of the positioning columns is arranged at a corner position of the inner bottom of the accommodating cavity, and at least two positioning columns are respectively located at two diagonal positions of the inner bottom of the accommodating cavity, the limiting plate is provided with at least two through holes A adapted to the positioning columns, the pressing plate is provided with at least two through holes B adapted to the positioning columns, and the covering plate is provided with at least two through holes C adapted to the positioning columns, and the positioning columns can be inserted into the through holes A, B, and C in sequence.

[0021] Therefore, when installing the limit plate, just align the through hole A on the limit plate with the positioning column on the base plate and put it on the positioning column to accurately cover the limit plate. When installing the pressing plate, just align the through hole B on the pressing plate with the positioning column on the base plate and put it on the positioning column to accurately cover the pressing plate. When installing the covering plate, just align the through hole C on the covering plate with the positioning column on the base plate and put it on the positioning column to accurately cover the pressing plate. The presence of the positioning column on the base plate can make the limit plate, pressing plate, and covering plate quickly and accurately installed on the base plate in sequence.

[0022] Preferably, the number of the positioning posts, the through holes A and the through holes B are all two, the two positioning posts are respectively located at two diagonal positions at the bottom of the accommodating cavity, the number of the through holes C is four, and the four through holes C are arranged in a square shape.

[0023] Therefore, the two positioning posts are arranged diagonally on the bottom of the accommodating cavity to ensure that the limiting plate, the pressing plate, and the covering plate will not move on the horizontal plane, thereby ensuring that the screen part of the screen assembly will not move on the horizontal plane. The four perforations C arranged in a square shape can allow the covering plate to be placed on the two positioning posts through the two perforations C on both sides, which is very convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a screen assembly positioned and installed by the screen pin welding positioning device of the utility model;

[0025] Figure 2 for Figure 1 A perspective view of the screen assembly shown;

[0026] Figure 3 This is a structural schematic diagram of a screen pin welding positioning device according to an embodiment of the utility model;

[0027] Figure 4 for Figure 3 The schematic diagram of the disassembled structure of the screen pin welding positioning device shown;

[0028] Figure 5 for Figure 4 The enlarged structural schematic diagram of point A in the screen pin welding positioning device is shown. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or a connection between the internal parts of two elements.

[0031] Figure 1 and Figure 2 The structure of the screen assembly positioned and installed by the screen pin welding positioning device of the utility model is schematically shown.

[0032] See also Figure 1 and Figure 2 The screen assembly 10 includes a circuit board 101 and a screen 102 (such as a liquid crystal screen on a paper shredder). In order to prevent the base 1021 of the screen 102 from interfering with the components on the circuit board 101, the lengths of the multiple pins A10211 and the multiple pins B10212 on the side of the base 1021 of the screen 102 are relatively long. The pin A10211 is located on the side of the base 1021, and the pin B10212 is located on the side of the protruding portion 10213 of the base 1021 that protrudes from the screen 102.

[0033] Figures 3 to 5 The structure of a screen pin welding positioning device according to an embodiment of the utility model is schematically shown.

[0034] See also Figures 3 to 5 The screen pin welding positioning device includes a base plate 1, a limiting plate 2, a pressing plate 3, a covering plate 4, a pressing piece 5 and a positioning column 6.

[0035] See also Figure 3The covering plate 4, the pressing plate 3, and the limiting plate 2 are stacked on the bottom plate 1 from top to bottom in sequence, and the pressing member 5 is installed on the bottom plate 1. The pressing member 5 can be pressed against the top of the covering plate 4 to press the covering plate 4, the pressing plate 3, and the limiting plate 2.

[0036] See also Figure 4 The bottom plate 1 is formed with a receiving cavity 11, which is used to receive Figure 2 The circuit board 101 of the screen assembly 10 shown in the figure; the inner bottom of the accommodating cavity 11 is formed with openings, including openings A12, openings B13 and openings C14, and the openings A12, B13 and C14 are all rectangular in shape, and the opening A12 is used to insert Figure 2 The plurality of pins A10211 shown, the opening B13 is used for inserting Figure 2 The plurality of pins B10212 shown, the opening C14 is used to accommodate Figure 2 As shown in the welding position 1012 of the terminal 1011 of the screen assembly 10, after the screen assembly is positioned and fixed, the pins of the screen can be welded at the openings A12 and B13 on the back of the base plate 1, which is very convenient. The presence of the opening C14 can prevent the welding position of the terminal of the screen assembly from being crushed.

[0037] See also Figure 4 A concave avoidance portion B111 is formed between two adjacent side walls of the accommodating cavity 11. The avoidance portion B111 can be formed by forming a cylindrical recess at the corner between two adjacent side walls of the accommodating cavity 11. During the installation or removal of the screen assembly, the existence of the avoidance portion B111 enables the circuit board portion of the screen assembly to be smoothly snapped into and removed from the accommodating cavity 11 on the base plate 1. Moreover, it can prevent the corner of the circuit board portion of the screen assembly from being damaged during the installation and removal process, causing defects.

[0038] See also 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 accommodating chamber 11, and the bottom of the other positioning post 6 is fixed at another corner of the inner bottom of the accommodating chamber 11. The two positioning posts 6 are respectively located at two diagonal positions of the inner bottom of the accommodating chamber 11. The top of the positioning post 6 is conical to facilitate the sleeve connection of the limiting plate 2, the pressing plate 3, and the covering plate 4. In other embodiments, there may be three positioning posts 6, and the three positioning posts 6 are respectively installed at the three corners of the inner bottom of the accommodating chamber 11, wherein the two positioning posts 6 are respectively located at the two diagonal positions of the inner bottom of the accommodating chamber 11. In other embodiments, there may be four positioning posts 6, and the four positioning posts 6 are respectively installed at the four corners of the inner bottom of the accommodating chamber 11.

[0039] See also Figure 4The limiting plate 2 is covered on the bottom plate 1, and a hollow position 21 is formed on the limiting plate 2. The hollow position 21 is used to accommodate Figure 2 The shape of the hollowed-out position 21 of the base 1021 of the screen 102 is adapted to the shape of the base 1021 of the screen 102 .

[0040] See also Figure 4 The limiting plate 2 is formed with an avoidance position A22 and an avoidance position B23, the hollow position 21 includes a hollow position A211 and a hollow position B212 which are connected to each other, the hollow position A211 and the hollow position B212 are used to accommodate the base of the screen of the screen assembly, the hollow position A211 is square in shape, and the shape of the hollow position A211 is similar to Figure 2 The shape of the screen 102 of the screen assembly 10 shown is adapted, and the hollow position B212 is triangular in shape. Figure 2 The shape of the protruding portion 10213 of the base 1021 protruding from the screen 102 is adapted, and the avoidance position A22 is formed by the concave side wall of the hollow position A211, and the avoidance position A22 is used to avoid Figure 2 The plurality of pins A10211 shown in the figure, the avoidance position B23 is formed by the concave side wall of the hollow position B212, and the avoidance position B23 is used to avoid Figure 2 The multiple pins B10212 shown; the limit plate 2 can limit the movement of the screen and the base of the screen assembly on the horizontal plane, that is, the hollow position A211 and the hollow position B212 can prevent the screen and the base of the screen assembly from moving on the horizontal plane, and the avoidance position A22 and the avoidance position B23 can provide avoidance space for the pins of the screen assembly to prevent the pins of the screen assembly from being pressed by the side wall of the limit plate 2 and causing defects.

[0041] See also Figure 4 In this embodiment, two through holes A24 adapted to the positioning posts 6 are formed on the limit plate 2. When installing the limit plate 2, the limit plate 2 can be accurately covered on the base plate 1 by aligning the two through holes A24 on the limit plate 2 with the two positioning posts 6 on the base plate 1 and putting them on the positioning posts 6.

[0042] See also Figure 4 The four corners of the hollow position A211 are respectively formed with concave avoidance portions C2111. The avoidance portions C2111 can be formed by forming a cylindrical recess at the four corners of the hollow position A211. The existence of the avoidance portions C2111 can prevent the corners of the screen and the base of the screen assembly from being damaged during the assembly and disassembly of the limiting plate 2, causing defects.

[0043] See also Figure 4 The pressing plate 3 is covered on the limiting plate 2, and a screen receiving position 31 is formed on the pressing plate 3. The screen receiving position 31 is in a square shape. The screen receiving position 31 is used to receive the screen of the screen assembly. The shape of the screen receiving position 31 is similar to Figure 2The shape of the screen 102 of the screen assembly 10 shown is adapted, and the screen receiving position 31 can prevent the screen of the screen assembly from moving in a horizontal plane.

[0044] See also Figure 4 When the pressing plate 3 is covered on the limiting plate 2, at least a portion of the pressing plate 3 will be pressed above the hollow position B212 on the limiting plate 2. In this way, when in use, a portion of the pressing plate 3 can be pressed on Figure 2 The base 1021 shown protrudes over the protrusion 10213 of the screen 102, preventing the screen and the base of the screen assembly from moving in the longitudinal direction.

[0045] See also Figure 4 The four corners of the screen accommodating position 31 are respectively formed with concave avoidance portions A311. The avoidance portions A311 can be formed by forming a cylindrical recess at the four corners of the screen accommodating position 31. The existence of the avoidance portions A311 can prevent the corners of the screen of the screen assembly from being damaged during the assembly and disassembly process of the pressing plate 3, causing defects.

[0046] See also Figure 4 The side wall of the screen accommodation position 31 is formed with an avoidance position C312, which is used to avoid Figure 2 The multiple pins of A10211 are shown.

[0047] See also Figure 4 In this embodiment, two through holes B32 adapted to the positioning posts 6 are formed on the pressing plate 3. When installing the pressing plate 3, the pressing plate 3 can be accurately covered on the limiting plate 2 by aligning the two through holes B32 on the pressing plate 3 with the two positioning posts 6 on the base plate 1 and putting them on the positioning posts 6.

[0048] See also Figure 4 The covering plate 4 is covered on the pressing plate 3 to cover the screen accommodating position 31 on the pressing plate 3. The covering plate 4 can further ensure that the screen of the screen assembly cannot move in the longitudinal direction.

[0049] See also Figure 4 In this embodiment, four perforations C41 are formed on the cover plate 4, and the four perforations C41 are arranged in a square shape. Two perforations C41 on one diagonal are adapted to the two positioning posts 6, and two perforations C41 on the other diagonal are also adapted to the two positioning posts 6. In this way, the cover plate 4 can be sleeved on the two positioning posts 6 on the bottom plate 1 through the two perforations C41 on both sides, which is very convenient. When installing the cover plate 4, the cover plate 4 can be accurately covered on the pressing plate 3 by aligning the two perforations C41 on the cover plate 4 with the two positioning posts 6 on the bottom plate 1 and sleeved on the positioning posts 6. In other embodiments, the number of perforations C41 can also be two, and the positions of the two perforations C41 can be adapted to the two positioning posts 6.

[0050] See also Figure 3 The two positioning posts 6 on the bottom plate 1 can enable the limiting plate 2, the pressing plate 3, and the covering plate 4 to be installed on the bottom plate 1 quickly and accurately in sequence.

[0051] See also Figure 4 and Figure 5 , the pressing member 5 is installed on the base plate 1, and the pressing member 5 includes a base 51, an adjusting bolt 52, a spring 53 and a pressing portion 54. The base 51 is fixed on the base plate 1, and the adjusting bolt 53 is screwed on the top of the base 51. The spring 53 is sleeved on the adjusting bolt 52, and the pressing portion 54 is also sleeved on the adjusting bolt 52. The pressing portion 54 is rotatably connected with the adjusting bolt 52, that is, the pressing portion 54 can rotate around the adjusting bolt 53, one end of the spring 53 presses on the pressing portion 54, and the other end of the spring 53 presses on the nut of the adjusting bolt 52, and the spring 53 is in a compressed state; when the limit plate 2, the pressing plate 3, and the covering plate 4 are sequentially installed on the base plate 1, the pressing portion 54 is rotated to press the pressing portion 54 against the top of the covering plate 4 On the top, under the elastic force of the spring 53, the clamping part 54 can press the covering plate 4, the pressing plate 3, and the limiting plate 2 on the bottom plate 1 to ensure that the screen of the screen assembly is positioned and fixed in the horizontal plane and in the vertical direction. After welding the pins of the screen, the clamping part 54 is rotated to separate the clamping part 54 from the covering plate 4. At this time, the covering plate 4, the pressing plate 3 and the limiting plate 2 can be removed, and it is very convenient to press and release the covering plate 4. Moreover, when the overall height of the covering plate 4, the pressing plate 3, and the limiting plate 2 increases due to the thickness of the screen assembly, due to the existence of the spring 53, the clamping part 54 can still be pressed on the covering plate 4 to press the covering plate 4, the pressing plate 3, and the limiting plate 2, so that it can be suitable for screen assemblies of different heights.

[0052] See also Figure 5 In order to facilitate the rotation of the clamping part 54, a toggle column 541 is formed on the clamping part 54. By pulling the toggle column 541, the clamping part 54 can be pressed onto the covering plate 4 or separated from the covering plate 4, which is very convenient. When the overall height of the covering plate 4, the pressing plate 3, and the limiting plate 2 increases due to the thickness of the screen assembly, the toggle column 541 can be pulled upward first, and then the toggle column 541 can be pulled to press the clamping part 54 onto the covering plate 4.

[0053] See also Figure 3 and Figure 4 The number of the clamping members 5 is four, and the four clamping members 5 are distributed near the four corners of the upper surface of the base plate 1. In this way, the four clamping members 5 can balance the covering plate 4, the pressing plate 3, and the limiting plate 2 on the base plate 1.

[0054] See also Figure 2When the circuit board 101 and the screen 102 of the screen assembly 10 need to be assembled together, firstly, all the pins A 10211 and all the pins B 10212 of the screen 102 are respectively connected to the circuit board 102. Figure 4, snap-fit ​​the circuit board 101 of the screen assembly 10 into the accommodating cavity 11 on the bottom plate 1, so that the multiple pins A10211 on the screen 102 are inserted into the opening A12 in the accommodating cavity 11, and the multiple pins B10212 on the screen 102 are inserted into the opening B13 in the accommodating cavity 11, and the welding position 1012 of the terminal 1011 of the screen assembly 10 is accommodated in the opening C14 in the accommodating cavity 11. The bottom plate 1 can prevent the circuit board 101 of the screen assembly 10 from moving on the horizontal plane, and then align the two through holes A24 on the limiting plate 2 with the two positioning columns 6 respectively and cover the positioning columns 6 so that the limiting plate 2 is accurately covered on the bottom plate 1. At this time, the base 1021 of the screen 102 of the screen assembly 10 is accommodated in the hollow position 21, the limiting plate 2 can limit the movement of the screen 102 of the screen assembly 10 on the horizontal plane, and then the two perforations B32 on the pressing plate 3 are respectively aligned with the two positioning posts 6 and are covered on the positioning posts 6 so that the pressing plate 3 is accurately covered on the limiting plate 2. At this time, a part of the pressing plate 3 will be pressed on the protruding portion 10213 of the base 1021 of the screen 102 of the screen assembly 10 that protrudes from the screen 102. The pressing plate 3 can further prevent the screen 102 of the screen assembly 10 from moving on the horizontal plane, and prevent the screen 102 and its base 1021 of the screen assembly 10 from moving in the longitudinal direction. Then, the two perforations C41 on the covering plate 4 are respectively aligned with the two positioning posts 6 and are covered on the positioning posts 6 so that the covering plate 4 is accurately covered. On the pressing plate 3, the covering plate 4 can further ensure that the screen 102 of the screen assembly 10 cannot move in the longitudinal direction. At this time, the toggle columns 541 on the four clamping members 5 are pulled respectively, and the clamping parts 54 of the clamping members 5 are pressed on the covering plate 4. Under the elastic force of the spring 53, the clamping part 54 can press the covering plate 4, the pressing plate 3, and the limiting plate 2 on the bottom plate 1. At this time, since the screen 102 of the screen assembly 10 is positioned, pressed and fixed in the horizontal plane and in the longitudinal direction, it can be ensured that the length of all pins A10211 on the screen 102 of the screen assembly 10 extending from the bottom of the circuit board 101 of the screen assembly 10 is consistent, and it can be ensured that all pins B10212 on the screen 102 of the screen assembly 10 are extended from the circuit board of the screen assembly 10 The length of the bottom extension of 101 remains the same. In this state, all pins A10211 and all pins B10212 of the screen 102 are welded at the openings A12 and B13 on the back of the bottom plate 1 respectively. After welding, the screen 102 of the screen assembly 10 will not tilt, ensuring that the screen 102 can be smoothly snap-fitted and installed on the product later. The screen pin welding positioning device of the utility model can weld screens with longer pins and a large number of pins on the circuit board with high quality, ensuring the installation accuracy of the screen on the circuit board. After welding, the toggle columns 541 on the four clamping members 5 are respectively pulled to separate the clamping parts 54 on the four clamping members 5 from the covering plate 4. At this time, the covering plate 4, the clamping plate 3, and the limit plate 2 are removed in turn.The assembled screen assembly 10 can be removed from the bottom plate 1.

[0055] The above are only some embodiments of the present invention, which are intended to illustrate the technical means of the present invention, but not to limit the technical scope of the present invention. Those skilled in the art can make obvious improvements to the present invention in combination with existing common knowledge, which all fall within the protection scope of the present invention.

Claims

1. Screen pin welding positioning device, characterized in that: The invention comprises a bottom plate, a limiting plate, a pressing plate, a covering plate and four pressing members, wherein the bottom plate is provided with a accommodating cavity for accommodating a circuit board of a screen assembly, the inner bottom of the accommodating cavity is provided with an opening for inserting the pins of the screen assembly, the limiting plate is covered on the bottom plate, the limiting plate is provided with a hollow position for accommodating the base of the screen of the screen assembly, the pressing plate is covered on the limiting plate, the pressing plate is provided with a screen accommodating position, the four corner positions of the screen accommodating position are respectively provided with a concave avoidance portion A, when the pressing plate is covered on the limiting plate, at least a part of the pressing plate is pressed above the hollow position, the covering plate is covered on the pressing plate to cover the screen accommodating position, the pressing member is provided on the bottom plate, the four pressing members are distributed on the upper surface of the bottom plate near the four corner positions, the pressing members can be pressed on the top of the covering plate to press the covering plate, the pressing plate and the limiting plate.

2. The screen pin welding positioning device according to claim 1, characterized in that: The clamping member comprises a base, an adjusting bolt, a spring and a clamping part, wherein the base is arranged on the bottom plate, the adjusting bolt is screwed on the base, the spring is sleeved on the adjusting bolt, the clamping part is sleeved on the adjusting bolt and is rotatably connected with the adjusting bolt, one end of the spring presses on the clamping part, and the other end of the spring presses on the nut of the adjusting bolt. The pressing part can be pressed against the top of the covering plate to press the covering plate, the pressing plate and the limiting plate.

3. The screen pin welding positioning device according to claim 1, characterized in that: The openings include opening A, opening B and opening C. The openings A and opening B are respectively used to insert the pins of the screen assembly, and the opening C is used to accommodate the welding positions of the connection terminals of the screen assembly.

4. The screen pin welding positioning device according to claim 1, characterized in that: The limit plate is provided with an avoidance position A and an avoidance position B, the hollow position includes a hollow position A and a hollow position B which are interconnected, the hollow position A is square-shaped, the hollow position B is triangular-shaped, the avoidance position A is arranged on the side wall of the hollow position A, the avoidance position B is arranged on the side wall of the hollow position B, and the avoidance position A and the avoidance position B are respectively used to avoid the pins of the screen component, The screen accommodating position is in a square shape. When the pressing plate is covered on the limiting plate, at least a portion of the pressing plate can be pressed above the hollow position B.

5. The screen pin welding positioning device according to claim 1, characterized in that: A side wall of the screen accommodating position is provided with an avoidance position C for avoiding the pins of the screen assembly.

6. The screen pin welding positioning device according to claim 1, characterized in that: A concave avoidance portion B is provided between two adjacent side walls of the accommodating cavity.

7. The screen pin welding positioning device according to claim 4, characterized in that: The four corners of the hollow position A are respectively provided with concave avoidance portions C.

8. The screen pin welding positioning device according to any one of claims 1 to 7, characterized in that: It also includes at least two positioning columns, the bottom of which is arranged at a corner position of the inner bottom of the accommodating cavity, and at least two positioning columns are respectively located at two diagonal positions of the inner bottom of the accommodating cavity, the limiting plate is provided with at least two through holes A adapted to the positioning columns, the pressing plate is provided with at least two through holes B adapted to the positioning columns, and the covering plate is provided with at least two through holes C adapted to the positioning columns, and the positioning columns can be inserted in through holes A, B, and C in sequence.

9. The screen pin welding positioning device according to claim 8, characterized in that: The number of the positioning posts, the through holes A and the through holes B are all two, and the two positioning posts are respectively located at two diagonal positions at the bottom of the accommodating cavity. The number of the through holes C is four, and the four through holes C are arranged in a square shape.

Images