PCB wave soldering jig
By designing a PCB board wave soldering fixture with rotating columns and fixing mechanisms, the problem of easy damage to the edges of the PCB board and inconvenient operation of the fixing method in the prior art is solved, and efficient and stable PCB board fixing is achieved, and production efficiency is improved.
Patent Information
- Application Number
- CN202422071202.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2034-08-26
AI Technical Summary
When existing PCB boards are wave soldered, the fixing method is easy to damage the edges of the board and is inconvenient to operate, which affects production efficiency.
A PCB board wave soldering fixture is designed, using a fixing mechanism of rotating columns, pressing blocks, rotating fixing blocks and springs. By pressing the pressing blocks, the rotating columns are rotated, so as to achieve stable fixing and unfixing of the PCB board to avoid bumps.
It realizes efficient and stable PCB board fixation, reduces bumps to the edges of the board and improves production efficiency.
Smart Images
Figure CN223274307U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wave soldering jigs, in particular to a wave soldering jig for PCB boards. Background Art
[0002] Circuit board fabrication is a precise process involving the assembly of electronic components onto blank PCBs. First, a solder paste printer evenly applies solder paste—a mixture of metallic tin and flux—to the designated pads on the PCB. Next, an automated placement machine precisely places surface mount components (SMDs), such as resistors, capacitors, and integrated circuits, onto the solder paste. The PCB then enters a reflow oven, where the high temperatures melt and flow the solder paste, which then cools and hardens, firmly securing the SMD components. After the SMD components are soldered, plug-in components such as diodes and connectors are inserted into the corresponding holes on the PCB. Finally, the PCB passes through a wave soldering machine, where a wave of molten solder is applied to the plug-in components, completing the soldering process.
[0003] Before wave soldering, the surface mount components have been soldered to the PCB board by reflow soldering. When wave soldering is performed, it is necessary to protect the surface mount components that have been soldered to prevent them from falling off during wave soldering. Therefore, when wave soldering is performed, the PCB is generally fixed on a specific jig. On the one hand, it protects the surface mount components that have been soldered, and on the other hand, it prevents the PCB from being deformed by high temperature during wave soldering. The existing method of fixing the PCB board is usually to thread one end of the fixing bar with the jig carrier board, and to clamp the PCB board into the gap between the other end of the fixing bar and the jig carrier board to achieve fixation. Using this method of fixation, on the one hand, it is easy to damage the edge of the PCB board, and on the other hand, it is inconvenient to operate, affecting production efficiency. Utility Model Content
[0004] In response to the above-mentioned problems, the present application provides a PCB wave soldering fixture that can solve the problems of inefficient operation and bumping into the PCB when fixing the PCB.
[0005] To achieve the above-mentioned purpose, the technical solution provided by the present application is as follows: a PCB wave soldering jig, comprising a carrier plate and a fixing mechanism, wherein the carrier plate is provided with a plurality of wave soldering openings, and the fixing mechanism comprises a rotating column, a pressing block, a rotating fixed block and a spring; the rotating fixed block is provided with a fixing portion extending in a horizontal direction; the rotating fixed block is located above the carrier plate, and the pressing block is located below the carrier plate, and the rotating fixed block is fixedly connected to the pressing block via a rotating column, and the spring is sleeved on the rotating column, and the spring is limited between the carrier plate and the pressing block; the curved surface of the rotating column is provided with at least two slide grooves rotating along a cylindrical spiral line, and the head end and the tail end of the slide groove are projected The central angle formed by the line connecting two points on the circumference of the top surface of the rotating column and the center of the top surface of the rotating column is 90°~180°; the carrier plate is provided with a through hole, and at least two protrusions are provided on the hole wall of the through hole, and the number of the protrusions corresponds to the number of the slide grooves; the protrusions are installed in the corresponding slide grooves; when the pressing block is pressed, the slide groove of the rotating column is limited by the protrusion, so that the rotating column spirally rises, changes the direction of the fixing part, and releases the fixation of the PCB board; when the pressing block is not pressed, the spring resets, the rotating column spirally descends, and the fixing part rotates 90°~180°, so that the fixing part fixes the PCB board.
[0006] Preferably, the contact end of the protrusion that contacts the slide groove is an arc surface and fits the slide groove.
[0007] Preferably, the curved surface of the rotating column is provided with two sliding grooves which are symmetrical with respect to the axis of the rotating column.
[0008] Preferably, the central angle formed by the line connecting the two points where the head end and the tail end of the chute are projected onto the circumference of the top surface of the rotating column and the center of the top surface of the rotating column is 90°.
[0009] Preferably, the central angle formed by the line connecting the two points where the head end and the tail end of the chute are projected onto the circumference of the top surface of the rotating column and the center of the top surface of the rotating column is 180°.
[0010] Preferably, a limit block is provided on the hole wall of the through hole close to the spring to limit the spring from entering the through hole.
[0011] Preferably, an elastic layer having elasticity and capable of enhancing friction is fixedly provided on the lower side of the fixing portion of the rotating fixing block.
[0012] Preferably, the elastic layer has a plurality of protrusions arranged in an array.
[0013] The above technical solution has the following advantages or beneficial effects:
[0014] 1. By setting up a fixing mechanism, when installing the PCB board, you only need to press the pressing block to make the rotating column move upward and rotate along its own axis. The rotating fixing block moves upward and rotates with the rotating column, so that the fixing part is away from the carrier board, making it easier to place the PCB board. After placement, release the pressing block to fix the PCB board. The same is true for removal, which is efficient and avoids bumping the PCB board.
[0015] 2. The central angles formed by the line connecting the two points where the head and tail ends of the slide are projected on the top circumference of the rotating column and the center of the top circle of the rotating column are 90° to 180°. This ensures that when the pressing block is fully pressed, the rotating column drives the fixed part to rotate to the corresponding angle. After rotating 90° to 180°, the fixed part is not directly above the PCB board, making it convenient to take and place the PCB board.
[0016] 3. The curved surface of the rotating column is provided with two symmetrical sliding grooves relative to the axis of the rotating column, which can make the rotating column rotate more stably when fewer sliding grooves are provided;
[0017] 4. The central angles formed by the line connecting the two points where the leading and trailing ends of the chute are projected onto the top circumference of the rotating column and the center of the top circle of the rotating column are specifically set to 90° or 180°. This setting ensures that the fixed part is not directly above the PCB board after it is fully rotated, and is more convenient for processing.
[0018] 5. The contact end of the bump and the slide is an arc surface and fits in with the slide to make the rotating column rotate more smoothly;
[0019] 6. The PCB board can be fixed more stably by providing the fixing portion and the elastic layer. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a schematic diagram of the overall structure of the PCB wave soldering fixture of an embodiment of the present application.
[0021] Figure 2 This application Figure 1 A partial enlarged view of part I.
[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the fixing mechanism of an embodiment of the present application from a first perspective.
[0023] Figure 4 It is a structural schematic diagram of the fixing mechanism of an embodiment of the present application from a second perspective.
[0024] Figure 5 This is an embodiment of the present application Figure 4 Schematic diagram of the structure in which the fixing mechanism rotates 90° around the axis of the rotating column.
[0025] Figure 6 This application Figure 5 Cross-sectional view at AA in the middle.
[0026] Figure 7 2 is a schematic structural diagram of an unpressed pressing block according to an embodiment of the present application.
[0027] Figure 8 It is a structural diagram of the pressing block of an embodiment of the present application.
[0028] In the figure: 1-carrier board; 11-wave soldering opening; 12-through hole; 121-hole wall; 122-bump; 123-limiting block; 2-fixing mechanism; 21-rotating column; 211-slide groove; 211-a-head end; 211-b-tail end; 22-pressing block; 23-rotating fixing block; 231-fixing part; 232-elastic layer; 24-spring. DETAILED DESCRIPTION
[0029] The following will be combined with the drawings of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described in this application are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0030] See Figure 1 、 Figure 2 、 Figure 7 and Figure 8 The PCB wave soldering fixture provided in the embodiment of the present application includes a carrier board 1 and a fixing mechanism 2, wherein the carrier board 1 is provided with a plurality of wave soldering openings 11; the fixing mechanism 2 includes a rotating column 21, a pressing block 22, a rotating fixing block 23 and a spring 24, the rotating fixing block 23 is provided with a fixing portion 231, and the spring 24 is sleeved on the rotating column 21 and limited between the carrier board 1 and the pressing block 22; by pressing the pressing block 22, the rotating column 21 is rotated, thereby realizing the rotation of the rotating fixing block 23, and then realizing the fixing and release of the PCB board by the fixing portion 231.
[0031] The curved surface of the rotating column 21 is provided with at least two sliding grooves 211 rotating along the cylindrical spiral line, see Figures 3 to 6 In this embodiment, there are two slide grooves 211 , and the two slide grooves 211 are symmetrical with respect to the axis of the rotating column 21 .
[0032] See Figure 1 and Figure 2The carrier plate 1 is provided with a through hole 12, and at least two protrusions 122 are provided on the hole wall 121 of the through hole 12. Preferably, the number of the protrusions 122 corresponds to the number of the slide grooves 211; the protrusions 122 are installed in the corresponding slide grooves 211, and the spring 24 is limited between the carrier plate 1 and the pressing block 22; when the pressing block 22 is pressed, the slide groove 211 of the rotating column 21 is limited by the protrusion 122, so that the rotating column 21 spirally rises, changes the direction of the fixing portion 231, and releases the fixation of the PCB board; when the pressing block 22 is not pressed, the spring 24 is reset, and the rotating column 21 spirally descends, causing the fixing portion 231 to rotate, thereby fixing the PCB board through the fixing portion 231.
[0033] When wave soldering is performed, the conveying device supports both sides of the carrier board 1 but does not support the pressing block 22 . It can also be understood that when wave soldering is performed, the spring 24 is in a reset state.
[0034] Figure 3 and Figure 4 Two chutes 211 are provided in each housing. The center angle formed by the line connecting the two points of the projection of the leading end 211-a and the trailing end 211-b of the same chutes 211 on the top circumference of the rotating column 21 and the center of the top circle of the rotating column 21 is 180°. Setting the center angle to 180° enables the fixing block 23 to rotate 180°, that is, the center angle determines the rotation angle of the fixing block 23. Changing the center angle allows the angle of the rotating fixing block 23 to be adjusted, particularly the angle of the fixing portion 231 on the rotating fixing block 23, thereby enabling the fixing portion 231 to secure and release the PCB.
[0035] See Figure 1 and Figure 2 The rotating fixed block 23 is located above the carrier plate 1, and the pressing block 22 is located below the carrier plate 1. The rotating fixed block 23 is fixedly connected to the pressing block 22 through the rotating column 21. The spring 24 is sleeved on the rotating column 21. The carrier plate 1 and the pressing block 22 limit the spring 24. The rotating fixed block 23 has a fixing portion 231 extending in the horizontal direction. Figure 7 As shown, when the pressing block 22 is not pressed, the fixing portion 231 extends toward the center axis of the carrier 1, ensuring that the fixing portion 231 is located above the PCB board and squeezes the PCB board from top to bottom to fix the PCB board; Figure 8 As shown, when the pressing block 22 is pressed, the rotating column 21 rotates, driving the fixing portion 231 to rotate 180 degrees and move away from the PCB board, thereby releasing the fixation of the PCB board.
[0036] like Figure 2 As shown, the contact end of the protrusion 122 that contacts the sliding groove 211 is an arc surface and fits the sliding groove 211 .
[0037] like Figure 2 As shown, a limiting block 123 is provided at a hole wall 121 of the through hole 12 close to the spring 24 to limit the spring 24 from entering the through hole 12 .
[0038] like Figure 1 As shown, an elastic layer 232 having elasticity and capable of enhancing friction is fixedly provided on the lower side of the fixing portion 231 of the rotating fixing block 23. Specifically, the elastic layer 232 may also have a plurality of protrusions arranged in an array.
[0039] In this embodiment, Figure 1 and Figure 7 As shown, when a PCB is placed on the carrier 1 and the pressing block 22 is not pressed, the fixing portion 231 is affected by the elastic force of the spring 24 and presses the PCB downward, thereby fixing the PCB; Figure 1 and Figure 8 As shown, to remove the PCB, simply fully press the pressing block 22. The rotating column 21 rotates upward, driving the fixing block 23. The fixing portion 231 of the fixing block 23 moves upward and away from the PCB. After rotating 180°, the fixing portion 231 is no longer directly above the PCB. In summary, the PCB wave soldering jig of this embodiment effectively secures the PCB and reduces impacts to the PCB during the process.
Claims
1. PCB wave soldering fixture, characterized by: It includes a carrier plate and a fixing mechanism, wherein the carrier plate is provided with a plurality of wave soldering openings, and the fixing mechanism includes a rotating column, a pressing block, a rotating fixing block and a spring; the rotating fixing block is provided with a fixing portion extending in the horizontal direction; The rotating fixed block is located above the carrier plate, and the pressing block is located below the carrier plate. The rotating fixed block is fixedly connected to the pressing block via a rotating column. The spring is sleeved on the rotating column, and the spring is limited between the carrier plate and the pressing block. The curved surface of the rotating column is provided with at least two chutes rotating along the cylindrical spiral line, and the central angle formed by the line connecting the two points of the head end and the tail end of the chutes projected on the circumference of the top surface of the rotating column and the center of the top surface of the rotating column is 90° to 180°; The carrier plate is provided with a through hole, and at least two protrusions are provided on the wall of the through hole, and the number of the protrusions corresponds to the number of the chute; the protrusions are installed in the corresponding chute; When the pressing block is pressed, the sliding groove of the rotating column is limited by the protrusion, so that the rotating column spirally rises, changes the direction of the fixing part, and releases the fixation of the PCB board; when the pressing block is not pressed, the spring returns to its original position, and the rotating column spirally descends, so that the fixing part rotates 90° to 180°, so that the fixing part fixes the PCB board.
2. The PCB wave soldering fixture according to claim 1, wherein: The contact end of the protrusion that contacts the sliding groove is an arc surface and fits the sliding groove.
3. The PCB wave soldering fixture according to claim 1, wherein: The curved surface of the rotating column is provided with two sliding grooves which are symmetrical relative to the axis of the rotating column.
4. The PCB wave soldering fixture according to claim 1, wherein: The central angle formed by the line connecting the two points where the head end and the tail end of the chute are projected on the circumference of the top surface of the rotating column and the center of the top surface of the rotating column is 90°.
5. The PCB wave soldering fixture according to claim 1, wherein: The central angle formed by the line connecting the two points where the head end and the tail end of the chute are projected on the circumference of the top surface of the rotating column and the center of the top surface of the rotating column is 180°.
6. The PCB wave soldering fixture according to claim 1, wherein: A limiting block is provided at the hole wall of the through hole close to the spring to limit the spring from entering the through hole.
7. The PCB wave soldering fixture according to claim 1, wherein: An elastic layer having elasticity and capable of enhancing friction is fixedly provided on the lower side of the fixing portion of the rotating fixing block.
8. The PCB wave soldering fixture according to claim 7, wherein: The elastic layer has a plurality of protrusions arranged in an array.