PCB pin welding jig

Abstract

The utility model relates to the field of black and white display screen production, in particular to a PCB pin welding jig. The PCB pin welding jig provided by the utility model can adapt to parallel fixation of PCBs with different sizes, prevents the PCBs and a single row of PINs from being in an inclined state, is convenient to use, and improves the soldering tin quality at the same time. A PCB pin welding jig comprises a base, a limiting rod, an adjusting block and the like, the limiting rod is connected to the upper side of the left front portion of the base in a sliding mode, the limiting rod is connected to the upper side of the left rear portion of the base, and the adjusting block is connected to the upper side of the right portion of the base in a sliding mode. According to the utility model, the single-row PINs are placed at the welding positions between the scale plates, then the positions of the limiting rods are adjusted to be matched with the sizes of the PCBs, and then the PCBs are placed between the limiting rods to be fixed in parallel, so that the PCBs with different sizes can be fixed in parallel, the PCBs and the single-row PINs are prevented from being in an inclined state, and the welding quality of the PCBs is improved. And the tin soldering quality is improved while the use is convenient.

Description

Technical Field

[0001] The utility model relates to the field of black and white display screen production, in particular to a PCB pin welding fixture. Background Art

[0002] In the field of electronic product manufacturing, the black and white display screen, as a classic and widely used display component, occupies an important position in many fields such as portable devices, instruments and meters, and home appliance control panels due to its low power consumption, low cost, and easy maintenance. PCB pin welding is a key link in the production process of black and white display screens, and its welding quality directly affects the electrical performance, stability, and service life of the products.

[0003] When producing the existing black and white display screens, it is necessary to weld single-row PINs on the PCB board. However, since the single-row PINs are in a loose state when sleeved on the PCB, when placed on the welding table, the PCB board and the single-row PINs will be in an inclined state, which easily causes the single-row PINs to be welded with skew and outward expansion defects, and the two ends of the welded product are uneven, affecting the soldering efficiency and posing a quality risk at the same time.

[0004] Therefore, a PCB pin welding fixture is now developed, which can adapt to parallel fixation of PCBs of different sizes, avoid the inclined state between the PCB board and the single-row PINs, facilitate use, and improve the soldering quality at the same time. Summary of the Invention

[0005] In order to overcome the defect that when producing the existing black and white display screens, the PCB board and the single-row PINs are in an inclined state, which easily causes the single-row PINs to be welded with skew and outward expansion defects, and the two ends of the welded product are uneven, affecting the soldering efficiency and posing a quality risk at the same time, the utility model provides a PCB pin welding fixture that can adapt to parallel fixation of PCBs of different sizes, avoid the inclined state between the PCB board and the single-row PINs, facilitate use, and improve the soldering quality at the same time.

[0006] The technical implementation solution of the present utility model is as follows: A PCB pin welding fixture, which includes a base, a limiting rod, an adjusting block, a dial plate, a scale plate, a lead screw, a slider, a welding assembly and a solder feeding assembly. The upper side of the left front part of the base is slidably connected with a limiting rod, the upper side of the left rear part of the base is connected with a limiting rod, the upper side of the right part of the base is slidably connected with an adjusting block, the upper side of the left front part of the adjusting block is slidably connected with a limiting rod, the upper side of the left rear part of the adjusting block is connected with a limiting rod, the right part of the adjusting block is slidably connected with two front and rear dial plates, a return spring is arranged between the dial plates, two front and rear scale plates are connected to the upper side of the middle part of the base, the dial plates are all clamped with the adjacent scale plates, and the scale plates are all slidably connected with the adjusting block. The left part of the base is rotatably connected with a lead screw, the lead screw is threadedly connected with a slider, a first guide rod is slidably connected between the front limiting rods, a second guide rod is connected between the rear limiting rods, and the front first guide rod is connected with the slider. A welding assembly capable of welding a single row of PINs is arranged on the base, and a solder feeding assembly capable of automatically feeding solder is arranged on the welding assembly.

[0007] Optionally, it further includes a handle, and the handle is connected to the front side of the lead screw.

[0008] Optionally, the distance between the scale plates is slightly larger than the width of the single row of PINs.

[0009] Optionally, the welding assembly includes a welding torch, a start button and a mounting bracket. The upper side of the rear part of the base is slidably connected with a mounting bracket, the welding torch is clamped on the mounting bracket, and the start button is arranged on the welding torch.

[0010] Optionally, the solder feeding assembly includes a solder bar, a support tube, a fixing block, a telescopic spring, a return tube and a cylinder. The front part of the mounting bracket is connected with a fixing block, the inner side of the fixing block is slidably connected with a return tube, the support tube is slidably connected to the fixing block, the support tube is located inside the return tube, a telescopic spring is connected between the support tube and the fixing block, the solder bar is clamped on the support tube, the support tube is slidably connected with the return tube, and the upper side of the front part of the mounting bracket is connected with a cylinder, and the telescopic end of the cylinder is connected with the return tube.

[0011] Optionally, the return tube is a conical structure with a larger upper part and a smaller lower part.

[0012] The present utility model has the following advantages: 1. By placing the single row of PINs at the welding position between the scale plates, then adjusting the position of the limiting rod to adapt to the size of the PCB, and then placing the PCB between the limiting rods and fixing it in parallel, the present utility model achieves the effect of being able to adapt to parallel fixing of PCBs of different sizes, avoiding the inclined state between the PCB board and the single row of PINs, facilitating use and improving the solder quality at the same time.

[0013] 2. By starting the cylinder, the reset pipe moves, causing the support pipe to clamp the solder bar and move it to the welding position. After the welding is completed, the cylinder is started again to reset the reset pipe, achieving the effect of automatically feeding the solder bar continuously, saving manpower and improving the soldering efficiency of the PCB board. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. 1 is a first three-dimensional structure diagram of the present utility model.

[0015] Figure 2 FIG. 2 is a structure diagram of the present utility model.

[0016] Figure 3 FIG. 3 is a second three-dimensional structure diagram of the present utility model.

[0017] Figure 4 FIG. 4 is a partial three-dimensional structure diagram of the present utility model.

[0018] In the above drawings: 1: base, 2: limit rod, 3: adjusting block, 4: dial plate, 5: scale plate, 6: handle, 7: lead screw, 8: slider, 9: first guide rod, 90: second guide rod, 10: soldering gun, 11: start button, 12: mounting bracket, 13: solder bar, 14: support pipe, 15: fixing block, 16: telescopic spring, 17: reset pipe, 18: cylinder. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Reference to an embodiment in this text means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present utility model. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0020] A PCB pin welding jig, as Figures 1 - 3As shown in the figure, it includes a base 1, a limit rod 2, an adjustment block 3, a dial 4, a scale plate 5, a handle 6, a lead screw 7, a slider 8, a welding assembly and a solder feeding assembly. On the upper side of the left front part of the base 1, the limit rod 2 is slidably connected. On the upper side of the left rear part of the base 1, the limit rod 2 is connected. On the upper side of the right part of the base 1, the adjustment block 3 is slidably connected. On the upper side of the left front part of the adjustment block 3, the limit rod 2 is slidably connected. On the upper side of the left rear part of the adjustment block 3, the limit rod 2 is connected. On the right part of the adjustment block 3, two front and rear dials 4 are slidably connected. A return spring is arranged between the dials 4. On the upper side of the middle part of the base 1, two front and rear scale plates 5 are connected. The distance between the scale plates 5 is slightly larger than the width of a single row of PINs. The dials 4 are all clamped with the adjacent scale plates 5. The scale plates 5 are all slidably connected with the adjustment block 3. On the left part of the base 1, the lead screw 7 is rotatably connected. On the front side of the lead screw 7, the handle 6 is connected. On the lead screw 7, the slider 8 is threadedly connected. Between the front limit rods 2, the first guide rod 9 is slidably connected. Between the rear limit rods 2, the second guide rod 90 is connected. The front first guide rod 9 is connected with the slider 8. A welding assembly is arranged on the base 1, and a solder feeding assembly is arranged on the welding assembly.

[0021] As Figures 1 - 3 shown, the welding assembly includes a welding torch 10, a start button 11 and a mounting bracket 12. On the upper side of the rear part of the base 1, the mounting bracket 12 is slidably connected. The welding torch 10 is clamped on the mounting bracket 12. The start button 11 is arranged on the welding torch 10.

[0022] As Figures 1 - 4 shown, the solder feeding assembly includes a solder bar 13, a support tube 14, a fixing block 15, a telescopic spring 16, a return tube 17 and a cylinder 18. On the front part of the mounting bracket 12, the fixing block 15 is connected. Inside the fixing block 15, the return tube 17 is slidably connected. On the fixing block 15, the support tube 14 is slidably connected. The support tube 14 is located inside the return tube 17. A telescopic spring 16 is connected between the support tube 14 and the fixing block 15. The solder bar 13 is clamped on the support tube 14. The support tube 14 is slidably connected with the return tube 17. On the upper side of the front part of the mounting bracket 12, the cylinder 18 is connected. The telescopic end of the cylinder 18 is connected with the return tube 17. The return tube 17 is a conical structure with a larger upper part and a smaller lower part.

[0023] When using the present utility model, first, the base 1 is moved to the welding area of the PCB. Then, the single-row PIN to be welded is placed between the scale plates 5 and at the welding position below the soldering gun 10, such that the scale plates 5 clamp and fix the single-row PIN at the welding position. Then, the dial plate 4 is pressed to slide inward towards the adjusting block 3, and the return spring is compressed and contracted, causing the dial plate 4 to move away from the scale plate 5. Next, the adjusting block 3 slides on the base 1, driving the limiting rod 2 on the adjusting block 3 to slide. The first guide rod 9 and the second guide rod 90 can guide during the sliding process of the limiting block, so that the distance between the limiting rods 2 on the left and right sides is adapted to the length of the PCB board. Then, the dial plate 4 is released, and the return spring rebounds, driving the dial plate 4 to reset and engage with the scale plate 5, fixing the adjusting block 3. Then, the screw rod 7 is rotated through the handle 6, and under the action of the thread, the slider 8 moves, driving the first guide rod 9 to move and driving the front limiting rod 2 to move, so that the position of the limiting rod 2 is adapted to the through-hole position on the PCB board to be welded. After that, the PCB board to be welded is placed between the limiting rods 2, and the limiting rods 2 pass through the through-holes on the PCB, fixing the PCB board parallel between the limiting rods 2, and the pins of the single-row PIN pass through the welding holes on the PCB, which can adapt to the parallel fixation of PCBs of different sizes, avoid the inclined state between the PCB board and the single-row PIN, and improve the soldering quality while being convenient to use. After the PCB board is placed, the air cylinder 18 is started, and the telescopic end of the air cylinder 18 is pushed out, causing the reset tube 17 to move downward. Under the action of friction, the support tube 14 slides downward along with the reset tube 17, and the telescopic spring 16 is stretched. At the same time, through the extrusion action of the reset tube 17 on the support tube 14, the support tube 14 contracts to clamp the solder bar 13 and drives the solder bar 13 to move downward, making the solder bar 13 move to the welding position on the PCB. Then, the start button 11 is pressed to heat the soldering gun 10 to melt the solder bar 13, and the soldering gun 10 welds the electrical components on the PCB board. After that, the air cylinder 18 is started, and the telescopic end of the air cylinder 18 moves upward, driving the reset tube 17 to move upward, causing the reset tube 17 to slide relative to the support tube 14, making the support tube 14 move away from the solder bar 13. At the same time, the telescopic spring 16 resets, driving the support tube 14 to reset, so as to facilitate the feeding of the solder bar 13, thus playing the role of being able to automatically and continuously feed the solder bar 13, saving manpower and improving the soldering efficiency of the PCB board.

[0024] The above embodiments are only the preferred embodiments of the present utility model and are not used to limit the implementation scope of the present utility model. Therefore, all equivalent changes made according to the content described in the claims of the present utility model should be included within the scope of the claims of the present utility model.

Claims

1. A PCB pin welding fixture, characterized by: The invention comprises a base (1), a limit rod (2), an adjustment block (3), a dial plate (4), a scale plate (5), a screw rod (7), a slider (8), a welding assembly and a tin feeding assembly. The upper left front part of the base (1) is slidably connected to the limit rod (2), the upper left rear part of the base (1) is connected to the limit rod (2), the upper right part of the base (1) is slidably connected to the adjustment block (3), the upper left front part of the adjustment block (3) is slidably connected to the limit rod (2), the upper left rear part of the adjustment block (3) is connected to the limit rod (2), the right part of the adjustment block (3) is slidably connected to two front and rear dial plates (4), a return spring is arranged between the dial plates (4), and the base (1) is connected to the limit rod (2). ) are connected to the front and rear scale plates (5) on the upper middle part, the dial plates (4) are all clamped with the adjacent scale plates (5), the scale plates (5) are all slidably connected to the adjustment block (3), the left part of the base (1) is rotatably connected to a screw rod (7), a slider (8) is threadedly connected to the screw rod (7), a first guide rod (9) is slidably connected between the front limit rods (2), a second guide rod (90) is connected between the rear limit rods (2), the front first guide rod (9) is connected to the slider (8), a welding assembly capable of welding a single row of PINs is provided on the base (1), and a tin feeding assembly capable of automatically feeding tin is provided on the welding assembly.

2. A PCB pin welding jig according to claim 1, characterized in that: It also includes a handle (6), and the front side of the screw rod (7) is connected to the handle (6).

3. A PCB pin welding jig according to claim 1, characterized in that: The spacing between the scale plates (5) is slightly larger than the width of a single row of PINs.

4. A PCB pin soldering jig according to claim 1, characterized in that: The welding assembly comprises a welding gun (10), a start button (11) and a mounting frame (12); the mounting frame (12) is slidably connected to the upper rear side of the base (1); the welding gun (10) is clamped on the mounting frame (12); and the welding gun (10) is provided with a start button (11).

5. A PCB pin soldering jig according to claim 1, characterized in that: The tin feeding assembly comprises a tin bar (13), a support tube (14), a fixed block (15), a telescopic spring (16), a reset tube (17) and a cylinder (18). The front part of the mounting frame (12) is connected to the fixed block (15), the inner side of the fixed block (15) is slidably connected to the reset tube (17), the upper part of the fixed block (15) is slidably connected to the support tube (14), the support tube (14) is located inside the reset tube (17), a telescopic spring (16) is connected between the support tube (14) and the fixed block (15), the tin bar (13) is clamped on the support tube (14), the support tube (14) and the reset tube (17) are slidably connected, the upper side of the front part of the mounting frame (12) is connected to the cylinder (18), and the telescopic end of the cylinder (18) is connected to the reset tube (17).

6. A PCB pin soldering jig according to claim 5, characterized in that: The reset tube (17) is a conical structure with a larger upper portion and a smaller lower portion.

Images