Welding carrier

Abstract

The utility model discloses a welding carrier which comprises a tray, the surface of the tray is concavely provided with an installation groove, the installation groove is used for placing a PCB to be welded, the bottom wall of the installation groove sinks to form a positioning groove, the positioning groove is used for assembling a first plug-in element arranged on the back face of the PCB, and the first plug-in element is used for assembling a second plug-in element arranged on the back face of the PCB. Avoiding holes which are arranged at intervals with the positioning grooves are formed in the bottom wall of the mounting groove and are used for avoiding pins of a second plug-in element on the front surface of the PCB; and the pressing assembly is arranged on the surface of the tray, the pressing assembly comprises a pressing block, and the pressing block is movably arranged in a notch of the mounting groove and used for pressing the mounted PCB. It can be understood that the technical scheme of the utility model avoids repeated thermal shock on the PCB caused by multiple reflow soldering, thereby ensuring the soldering reliability of the elements on the PCB.

Description

Technical Field

[0001] The utility model relates to the technical field of LED display, and particularly relates to a welding carrier. Background Art

[0002] During the production process of a product, surface-mounted components and plug-in components with pins (such as network structure components and power supply structure components) need to be installed on the front side of a PCB board. At the same time, plug-in components such as connectors need to be installed on the back side of the PCB board. The traditional welding method is to weld the surface-mounted components and double-sided plug-in components to the PCB board in sequence. In this way, the PCB board needs to go through three reflow soldering processes to complete the welding of the surface-mounted components and double-sided plug-in components. However, the three reflow soldering processes cause three thermal shocks to the PCB board, thereby affecting the welding reliability of the components on the PCB board. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a welding carrier, aiming to avoid repeated thermal shocks to the PCB board and ensure the welding reliability of the components on the PCB board.

[0004] To achieve the above purpose, the welding carrier proposed by the utility model includes:

[0005] A tray, on the surface of which an installation groove is recessed. The installation groove is used for placing the PCB board to be welded. A positioning groove is sunken in the bottom wall of the installation groove, and the positioning groove is used for assembling a first plug-in component provided on the back side of the PCB board. An avoidance hole is formed in the bottom wall of the installation groove and is spaced from the positioning groove, for avoiding the pins of a second plug-in component on the front side of the PCB board; and

[0006] A pressing assembly, which is arranged on the surface of the tray. The pressing assembly includes a pressing block, and the pressing block is movably arranged at the notch of the installation groove for pressing the installed PCB board.

[0007] Optionally, the pressing assembly includes the pressing block and a fixing member. A through hole is formed on the surface of the pressing block. The fixing member passes through the through hole and is inserted into the surface of the tray. The pressing block is rotatably arranged on the fixing member, so that the pressing block presses on the PCB board by rotation.

[0008] Optionally, an elastic member is connected between the end of the fixing member protruding from the tray and the pressing block. The elastic member expands and contracts along the insertion direction of the fixing member, so as to rotate the pressing block by squeezing the elastic member.

[0009] Optionally, the elastic member is a spring. The fixing member passes through the spring and the through hole in sequence and is inserted into the surface of the tray.

[0010] Optionally, a receiving cavity is formed on the surface of the pressing block, the spring is partially received in the receiving cavity, the through hole is provided on the bottom wall of the receiving cavity, and the spring is abutted and connected to the bottom wall of the receiving cavity.

[0011] Optionally, the fixing member includes a head and a rod, the rod passes through the spring and the through hole in sequence and is inserted into the surface of the tray, the end of the rod facing away from the tray is connected to the head, and the spring is connected between the head and the pressure block.

[0012] Optionally, a guiding slope is formed at the end of the rod portion away from the head portion, and the rod portion is inserted into the surface of the tray through the guiding slope.

[0013] Optionally, the welding carrier includes a plurality of the pressing assemblies, and the plurality of the pressing assemblies are arranged around the periphery of the mounting groove so that the pressing blocks of the plurality of the pressing assemblies are pressed on the PCB board at the same time.

[0014] Optionally, a plurality of ventilation holes are distributed on the surface of the tray at intervals, and the positioning groove and the avoidance hole are respectively arranged between the plurality of ventilation holes, so that heat is conducted to the PCB board through the plurality of ventilation holes.

[0015] Optionally, a plurality of the positioning grooves are sunken into the bottom wall of the mounting groove, and the plurality of the positioning grooves are arranged at intervals for assembling a plurality of first plug-in components on the back side of the PCB board;

[0016] And / or, a plurality of the avoidance holes are formed on the bottom wall of the installation slot, and the plurality of the avoidance holes are arranged at intervals to avoid pins of a plurality of second plug-in components on the front side of the PCB board.

[0017] The technical solution of the present utility model is applied when soldering surface-mounted components and plug-in components on a PCB board. First, solder paste is printed at the corresponding positions of the pads on the PCB board, and the surface-mounted components are placed on the pads printed with solder paste for surface-mounted components. At the same time, the first plug-in component on the back of the PCB board is assembled into the positioning groove of the tray. Then, the PCB board is positioned and installed through the first plug-in component in the positioning groove so that the PCB board is installed in the installation groove. Next, the pressing block is adjusted so that the pressing block presses on the PCB board in the installation groove. Finally, the second plug-in component is inserted into the corresponding pads on the front of the PCB board so that the pins of the first plug-in component on the front of the PCB board are placed in the avoidance holes of the installation groove. In this way, the PCB board completes the simultaneous soldering of surface-mounted components and double-sided plug-in components through one reflow soldering. In this way, repeated thermal shock to the PCB board caused by multiple reflow soldering is avoided, thereby ensuring the soldering reliability of the components on the PCB board. At the same time, the turnover of intermediate processes is avoided through one reflow soldering, improving the production efficiency of the product. And, the PCB board is closely attached to the first plug-in component on the back under the pressing action of the pressing block, preventing the PCB board from generating thermal deformation during the reflow soldering process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0019] Figure 1 It is a top view of a welding carrier for welding a PCB board and components in an embodiment of the present utility model;

[0020] Figure 2 is Figure 1 a sectional structure diagram of the welding carrier for welding the PCB board and components in

[0021] Figure 3 is Figure 2 a split structure diagram of the welding carrier, the PCB board and the components in

[0022] Explanation of the reference numerals in the drawings:

[0023] Name Label Name Label Tray 100 Fixing part 330 Installation groove 101a Head 331 Positioning groove 102a Rod part 333 Avoidance hole 103a Guiding inclined plane 334 Ventilation hole 104a Elastic part 350 Pressing component 300 PCB board 400 Pressing block 310 Surface mount component 500 Through hole 310a First plug-in component 600 Accommodating cavity 310b Second plug-in component 700

[0024] The realization of the object, the functional characteristics and the advantages of the present utility model will be further described in conjunction with the embodiments with reference to the drawings. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0027] See Figures 1 to 3 As shown, in an embodiment of the present utility model, a welding carrier includes: an installation groove 101a is recessed on the surface of a tray 100, and the installation groove 101a is used to place a PCB board 400 to be welded. A positioning groove 102a is sunken in the bottom wall of the installation groove 101a, and the positioning groove 102a is used to assemble a first plug-in component 600 provided on the back surface of the PCB board 400. An avoidance hole 103a spaced from the positioning groove 102a is formed on the bottom wall of the installation groove 101a for avoiding the pins of a second plug-in component 700 on the front surface of the PCB board 400; and a pressing assembly 300 is provided on the surface of the tray 100. The pressing assembly 300 includes a pressing block 310, and the pressing block 310 is movably provided at the notch of the installation groove 101a for pressing the installed PCB board 400.

[0028] The technical solution of the present utility model is applied to the soldering of surface-mounted components 500 and plug-in components on the PCB board 400. First, solder paste is printed at the corresponding positions of the pads on the PCB board 400, and the surface-mounted components 500 are placed on the pads of the surface-mounted components printed with solder paste. At the same time, the first plug-in component 600 on the back of the PCB board 400 is assembled into the positioning groove 102a of the tray 100. Then, the PCB board 400 is positioned and installed through the first plug-in component 600 in the positioning groove 102a, so that the PCB board 400 is installed in the installation groove 101a. Next, the pressing block 310 is adjusted to press the PCB board 400 in the installation groove 101a. Finally, the second plug-in component 700 is inserted into the corresponding pads on the front of the PCB board 400, so that the pins of the first plug-in component 600 on the front of the PCB board 400 are placed in the avoidance holes 103a of the installation groove 101a. In this way, the simultaneous soldering of the surface-mounted components 500 and the double-sided plug-in components is completed on the PCB board 400 through one reflow soldering. In this way, repeated thermal shocks to the PCB board 400 caused by multiple reflow soldering are avoided, thereby ensuring the soldering reliability of the components on the PCB board 400. At the same time, the turnover of intermediate processes is avoided through one reflow soldering, improving the production efficiency of the product. Moreover, the surface-mounted components 500 and the second plug-in component 700 on the front of the present utility model are closely attached to the PCB board 400 under their own action. At the same time, the PCB board 400 is closely attached to the first plug-in component 600 under the pressing action of the pressing block 310, realizing the close attachment of the surface-mounted components 500 and the double-sided plug-in components on the surface of the PCB board 400, and preventing the PCB board 400 from generating thermal deformation during the reflow soldering process.

[0029] Specifically, the welding method implemented on the welding carrier includes the following steps: the first step is to print solder paste on the pad of the PCB board 400: make a solder paste printing steel plate, and print solder paste on the patch component pad, the first plug-in through-hole pad, and the second plug-in through-hole pad of the PCB board 400 through the steel plate, wherein the first plug-in through-hole pad corresponds to the welding of the first plug-in component 600, and the second plug-in through-hole pad corresponds to the welding of the second plug-in component 700; the second step is to place the patch component 500 on the PCB board 400: place the patch component 500 on the patch component pad of the PCB board 400 by a patch machine; the third step is to install the first plug-in component 600 on Soldering carrier: install the pins of the first plug-in component 600 upwards into the positioning groove 102a; Step 4, install the PCB board 400 on the tray 100: put the PCB board 400 after patching into the installation groove 101a, and locate the position of the PCB board 400 by inserting the pins of the first plug-in component 600 into the first plug-in through-hole pad of the PCB board 400; Step 5, adjust the pressing block 310 of the pressing assembly 300 so that the pressing block 310 presses the PCB board 400 in the installation groove 101a; Step 6, insert the second plug-in component 700 into the second plug-in through-hole pad of the PCB board 400; Step 7, reflow soldering the welding carrier. In this way, the simultaneous soldering of the patch component 500 and the double-sided plug-in component on the PCB board 400 is completed through a single reflow soldering, thereby avoiding repeated heat treatment of the PCB board 400.

[0030] It should be noted that the tray 100 is made of high temperature resistant synthetic stone material, which is made of more than 95% natural stone powder, a small amount of polyester and adhesive, mixed, pressurized and vibrated under vacuum. Preferably, in the welding carrier, the installation groove 101a is made according to the size and thickness of the PCB board 400, which is used to match and place the PCB board 400 of corresponding size and thickness; the sunken positioning groove 102a is made according to the position and height of the first plug-in component 600 on the back of the PCB board 400, which is used to pre-place the first plug-in component 600 on the back of the PCB with its pins facing up and inverted into the positioning groove 102a, and the PCB board 400 is positioned by the pins of the first plug-in component 600 in the positioning groove 102a, thereby ensuring the welding accuracy. In addition, the pressing assembly 300 can be rotatably installed on the surface of the tray 100 by means of the shaft hole, and can also press or avoid the PCB board 400 in the installation groove 101a by moving along the depth direction of the installation groove 101a. As long as the pressing block 310 can achieve movable pressing of the PCB board 400, the embodiments of the utility model are not limited to this, and the above are all within the protection scope of the embodiments of the utility model.

[0031] See also Figures 1 to 3As shown, in an embodiment of the present utility model, the pressing assembly 300 includes a pressing block 310 and a fixing member 330. A through hole 310a is formed on the surface of the pressing block 310. The fixing member 330 passes through the through hole 310a and is inserted into the surface of the tray 100. The pressing block 310 is rotatably arranged on the fixing member 330 so that the pressing block 310 presses on the PCB board 400 through rotation. It should be noted that the aperture of the through hole 310a is larger than the outer diameter of the rod portion 333 of the fixing member 330 for passing through, thereby forming a transition fit between the pressing block 310 and the fixing member 330 to realize the rotation of the pressing block 310 relative to the fixing member 330. Specifically, when the pressing block 310 is a frustum structure, the through hole 310a is eccentrically arranged at the center of the frustum structure so as to adjust the rotation angle of the pressing block 310 to press on or disengage from the PCB board 400 in the mounting groove 101a; when the pressing block 310 is a strip structure, the through hole 310a is arranged on the surface of the strip structure so as to rotate the condition structure to the horizontal position or the vertical position to press on or disengage from the PCB board 400 in the mounting groove 101a. Of course, the fixing member 330 can be a plug pin or a screw, and the embodiments of the present utility model are not limited thereto, and the above are all within the protection scope of the present utility model.

[0032] See Figures 1 to 3 As shown, in an embodiment of the present utility model, an elastic member 350 is connected between the end of the fixing member 330 protruding from the tray 100 and the pressing block 310. The elastic member 350 expands and contracts along the insertion direction of the fixing member 330 so that the pressing block 310 is rotated by squeezing the elastic member 350 to press on the PCB board 400. It should be noted that the elastic member 350 can be a rubber structural member or a spring, as long as it can expand and contract along the insertion direction of the fixing member 330, and the embodiments of the present utility model are not limited thereto, and the above are all within the protection scope of the present utility model. In the present utility model, the elastic member 350 expands and contracts along the insertion direction of the fixing member 330. In this way, by squeezing the elastic member 350, the pressing block 310 is rotated to press on the PCB board 400 in the mounting groove 101a, realizing the close fit between the PCB board 400 and the first plug-in element 600, thereby avoiding the deformation of the PCB board 400 during the reflow soldering process.

[0033] See Figures 1 to 3 As shown, in an embodiment of the present utility model, the elastic member 350 is a spring. The fixing member 330 passes through the spring and the through hole 310a in sequence and is inserted into the surface of the tray 100. It should be noted that in the embodiment of the present utility model, the pressing plate is squeezed by the sleeved spring so that the pressing plate can be rotatably pressed on the PCB board 400, further ensuring the close fit between the PCB board 400 and the first plug-in element 600 and preventing the deformation of the PCB board 400 during the reflow soldering process.

[0034] See Figures 1 to 3As shown, in one embodiment of the utility model, a receiving cavity 310b is formed on the surface of the pressing block 310, the spring portion is received in the receiving cavity 310b, a through hole 310a is provided in the bottom wall of the receiving cavity 310b, and the spring is abutted against and connected to the bottom wall of the receiving cavity 310b. It should be noted that the spring portion is received in the receiving cavity 310b, and the spring performs telescopic movement along the side wall of the receiving cavity 310b, thereby effectively transmitting the pressing block 310 through the spring, and ensuring the close fit between the PCB board 400 and the first plug-in component 600.

[0035] See also Figures 1 to 3 As shown, in one embodiment of the present invention, the fixing member 330 includes a head 331 and a rod 333, the rod 333 is penetrated by a spring and a through hole 310a in sequence and inserted into the surface of the tray 100, the end of the rod 333 away from the tray 100 is connected to the head 331, and a spring is connected between the head 331 and the pressing block 310. It should be noted that the present invention sandwiches a spring between the head 331 and the pressing block 310, so that the squeezed spring drives the pressing block 310 to move toward the notch of the installation slot 101a, thereby ensuring the close fit between the PCB board 400 in the installation slot 101a and the first plug-in component 600.

[0036] See also Figures 1 to 3 As shown, in one embodiment of the utility model, the end of the rod 333 away from the head 331 is formed with a guide slope 334, and the rod 333 is inserted into the surface of the tray 100 through the guide slope 334. It should be noted that the utility model is provided with the guide slope 334, so that the rod 333 can be quickly inserted into the surface of the tray 100. Of course, the surface of the tray 100 can be provided with a corresponding assembly hole, or the hole wall of the assembly hole and the guide slope 334 can be interference-fitted to improve the stability of the assembly of the fixing member 330. The embodiment of the utility model is not limited to this, and the above are all within the protection scope of the utility model.

[0037] See also Figures 1 to 3 As shown, in one embodiment of the present invention, the welding carrier includes a plurality of pressing components 300, and the plurality of pressing components 300 are disposed around the periphery of the mounting groove 101a so that the pressing blocks 310 of the plurality of pressing components 300 are simultaneously pressed on the PCB board 400. It should be noted that the present invention ensures that the PCB board 400 and the first plug-in component 600 are closely fitted by the plurality of pressing components 300 disposed around the periphery of the mounting groove 101a so that the pressing blocks 310 of the plurality of pressing components 300 are simultaneously pressed on the PCB board 400 in the mounting groove 101a.

[0038] See also Figures 1 to 3As shown, in an embodiment of the present utility model, a plurality of ventilation holes 104a are distributed on the surface of the tray 100 at intervals, and the positioning grooves 102a and the avoidance holes 103a are respectively arranged between the plurality of ventilation holes 104a, so that heat is conducted to the PCB board 400 through the plurality of ventilation holes 104a. It should be noted that the plurality of ventilation holes 104a are distributed on the surface of the tray 100 for installing the pressing component 300 and the bottom wall of the installation groove 101a, so that the reflux hot air is conducted to the PCB board 400 through the plurality of ventilation openings, thereby realizing uniform heating of the PCB board 400 and improving the welding reliability of the surface-mounted components 500 and the double-sided plug-in components on the PCB board 400.

[0039] See Figures 1 to 3 As shown, in an embodiment of the present utility model, a plurality of positioning grooves 102a are sunken on the bottom wall of the installation groove 101a, and the plurality of positioning grooves 102a are arranged at intervals for assembling a plurality of plug-in components provided on the back surface of the PCB board 400. It should be noted that the embodiment of the present utility model can set the positioning grooves 102a according to the first plug-in component 600 assembled on the back surface of the PCB board 400. Of course, the positions and sizes of the positioning grooves 102a are set according to the positions and sizes of the corresponding first plug-in component 600, so as to satisfy the welding of the plurality of first plug-in components 600 on the PCB board 400, thereby being applicable to the welding of a plurality of first plug-in components on the back surface of the PCB board 400.

[0040] See Figures 1 to 3 As shown, in an embodiment of the present utility model, a plurality of avoidance holes 103a are formed on the bottom wall of the installation groove 101a, and the plurality of avoidance holes 103a are arranged at intervals for avoiding the pins of a plurality of plug-in components on the front surface of the PCB board 400. It should be noted that the embodiment of the present utility model can set the avoidance holes 103a according to the second plug-in component 700 assembled on the front surface of the PCB board 400. Of course, the positions and sizes of the avoidance holes 103a are set according to the positions and sizes of the corresponding second plug-in component 700, so as to satisfy the welding of the plurality of second plug-in components 700 on the PCB board 400, thereby being applicable to the welding of a plurality of second plug-in components on the front surface of the PCB board 400.

[0041] The above are only optional embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A welding carrier, characterized in that: include: A tray, wherein a mounting groove is concavely formed on the surface of the tray, the mounting groove is used to place the PCB board to be soldered, a positioning groove is sunken on the bottom wall of the mounting groove, the positioning groove is used to assemble a first plug-in component arranged on the back of the PCB board, and a avoidance hole is formed on the bottom wall of the mounting groove and is arranged at a distance from the positioning groove, so as to avoid the pins of the second plug-in component on the front side of the PCB board; and A pressing component is arranged on the surface of the tray, and the pressing component includes a pressing block, which is movably arranged in the notch of the installation slot and is used to press the installed PCB board.

2. The welding carrier according to claim 1, characterized in that: The pressing assembly includes the pressing block and a fixing piece. A through hole is opened on the surface of the pressing block. The fixing piece passes through the through hole and is inserted into the surface of the tray. The pressing block can be rotatably arranged on the fixing piece so that the pressing block can be pressed on the PCB board by rotation.

3. The welding carrier according to claim 2, characterized in that: An elastic member is connected between the end of the fixing member protruding from the tray and the pressing block, and the elastic member telescopes along the insertion direction of the fixing member, so that the pressing block is rotated by squeezing the elastic member.

4. The welding carrier according to claim 3, characterized in that: The elastic member is a spring, and the fixing member passes through the spring and the through hole in sequence and is inserted into the surface of the tray.

5. The welding carrier according to claim 4, characterized in that: A receiving cavity is formed on the surface of the pressing block, the spring is partially received in the receiving cavity, the bottom wall of the receiving cavity is provided with the through hole, and the spring is abutted and connected to the bottom wall of the receiving cavity.

6. The welding carrier according to claim 4, characterized in that: The fixing member includes a head and a rod, the rod is penetrated by the spring and the through hole in sequence and inserted into the surface of the tray, the end of the rod away from the tray is connected to the head, and the spring is connected between the head and the pressure block.

7. The welding carrier according to claim 6, characterized in that: The end of the rod part away from the head part is formed with a guiding inclined surface, and the rod part is inserted into the surface of the tray through the guiding inclined surface.

8. The welding carrier according to any one of claims 1 to 7, characterized in that: The welding carrier comprises a plurality of pressing assemblies, and the plurality of pressing assemblies are arranged around the periphery of the mounting slot so that the pressing blocks of the plurality of pressing assemblies are pressed on the PCB board at the same time.

9. The welding carrier according to any one of claims 1 to 7, characterized in that: A plurality of ventilation holes are distributed on the surface of the tray and are arranged at intervals. The positioning groove and the avoidance hole are respectively arranged between the plurality of ventilation holes, so that heat is conducted to the PCB board through the plurality of ventilation holes.

10. The welding carrier according to any one of claims 1 to 7, characterized in that: A plurality of positioning grooves are sunken on the bottom wall of the mounting groove, and the plurality of positioning grooves are arranged at intervals for assembling a plurality of first plug-in components on the back of the PCB board; And / or, a plurality of the avoidance holes are formed on the bottom wall of the installation slot, and the plurality of the avoidance holes are arranged at intervals to avoid pins of a plurality of second plug-in components on the front side of the PCB board.

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