Auxiliary surface mounting jig

Abstract

The utility model relates to an auxiliary surface mounting jig, which comprises a jig main body, the jig main body is provided with a loading part, the loading part is used for accommodating a circuit board, and the jig main body is provided with a first connecting piece; a first connecting piece and a pressing piece are arranged on the jig main body, a second connecting piece and a pressing piece are arranged on the cover plate, the cover plate is arranged on the jig main body, the first connecting piece is connected with the second connecting piece, and the pressing piece is used for applying pressure for applying floating components on the circuit board to be attached to the circuit board. The first connecting piece and the second connecting piece are connected to ensure that the cover plate and the jig main body are stably assembled, the cover plate is provided with the pressing piece, and the pressing piece can apply pressure towards the circuit board to the component with the floating phenomenon, so that the component is attached to the circuit board, the floating problem of the component is solved, and the product quality is improved. High surface mounting quality of components is ensured, and influence on circuit and product performance is avoided.

Description

Technical Field

[0001] This application relates to the technical field of circuit board processing, and in particular to an auxiliary mounting fixture. Background Technology

[0002] Surface Mount Technology (SMT), also known as surface mount technology, is a circuit assembly technology that mounts leadless or short-lead surface mount components (SMC / SMD, also called chip components) onto the surface of a printed circuit board (PCB) or other substrate, and then assembles them through methods such as reflow soldering or dip soldering. For example, in the manufacturing process of LED light boards, electronic components such as capacitors and resistors need to be mounted onto the PCB board according to the positions shown on the design circuit diagram. To ensure mounting quality and accuracy, fixtures are also needed to load and position the PCB board.

[0003] As SMT technology becomes increasingly mature, customers have higher and higher requirements for product precision. In actual production, component placement will cause a floating problem. Simply relying on the pressing precision of the pick-and-place machine cannot effectively solve the floating problem, resulting in poor component placement quality and affecting circuit and product performance. Utility Model Content

[0004] Therefore, it is necessary to provide an auxiliary surface mount fixture to address the problem of poor mounting quality caused by component floating height, which affects circuit and product performance.

[0005] A first aspect of this application provides an auxiliary patch fixture, comprising:

[0006] A fixture body, the fixture body having a loading section for accommodating a circuit board, and a first connector provided on the fixture body; and

[0007] A cover plate is provided with a second connector and a pressing member. The cover plate is disposed on the main body of the fixture. The first connector is connected to the second connector. The pressing member is used to apply pressure to the components that cause floating on the circuit board to adhere to the circuit board.

[0008] This auxiliary mounting fixture is used in the processing of surface mount components on circuit boards. During use, the circuit board is placed on the loading section of the fixture body for positioning, and then the components are mounted onto the surface of the circuit board. During the process, a cover plate is placed over the circuit board and the fixture body, and a first connector and a second connector are used to ensure a stable assembly between the cover plate and the fixture body. Because the cover plate has a pressing component, it applies pressure towards the circuit board to components that have become displaced, thus ensuring that the components adhere to the circuit board. This solves the problem of component displacement, guarantees high component mounting quality, and avoids affecting circuit and product performance.

[0009] The technical solution of this application will be further described below:

[0010] In one embodiment, one of the first connector and the second connector is a metal part, and the other of the first connector and the second connector is a magnetic part. The magnetic part is magnetically connected to the metal part to apply a pulling force to the cover plate to adhere to the fixture body.

[0011] Alternatively, one of the first connector and the second connector may be a magnet, and the other of the first connector and the second connector may be a magnetic snap fastener. The magnet and the magnetic snap fastener are magnetically connected to apply a pulling force to the cover plate to adhere to the main body of the fixture.

[0012] In one embodiment, the pressing member includes an elastic body and a pressing body, one end of the elastic body is disposed on the cover plate, and the other end of the elastic body is connected to the pressing body.

[0013] In one embodiment, the pressing member further includes a guide cylinder disposed on the cover plate, with the opening of the guide cylinder facing the fixture body. The pressing body and the elastic body are both disposed inside the guide cylinder, with the pressing body extending out of the opening of the guide cylinder. The outer peripheral wall of the pressing body slides in conjunction with the inner wall of the guide cylinder.

[0014] In one embodiment, the end of the pressure body used to abut against the component is provided with a flexible layer.

[0015] In one embodiment, the auxiliary patch fixture further includes a plurality of positioning components, which are disposed on the fixture body and spaced apart around the outer periphery of the loading portion, and are used to abut and position against the outer periphery of the circuit board.

[0016] In one embodiment, the loading portion is a receiving groove recessed into the fixture body, and the sidewall of the receiving groove is provided with a notch for avoiding the top corner of the circuit board.

[0017] In one embodiment, the bottom wall of the receiving groove is provided with a plurality of dispersed clearance openings.

[0018] In one embodiment, one of the fixture body and the cover plate is provided with at least two positioning holes, and the other of the fixture body and the cover plate is provided with at least two positioning posts, which are inserted into the positioning holes one by one.

[0019] In one embodiment, the fixture body is further provided with a plurality of heat dissipation holes, which are arranged around the outer periphery of the loading part.

[0020] In one embodiment, the fixture body is further provided with an identification part, which is located on the outside of the loading part.

[0021] In one embodiment, the fixture body has a first step structure and a second step structure on opposite sides. Attached Figure Description

[0022] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute an undue limitation of this application.

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a top view of the auxiliary patch fixture described in one embodiment of this application.

[0025] Figure 2 This is a top view of the main body of the fixture in one embodiment.

[0026] Figure 3 This is a top view of the cover plate in one embodiment.

[0027] Figure 4 for Figure 2 A side view of the main body of the central fixture.

[0028] Explanation of reference numerals in the attached figures:

[0029] 100. Auxiliary patch fixture; 10. Fixture body; 11. Loading part; 111. Notch; 112. Clearance cutout; 12. First connector; 13. Positioning hole; 14. Heat dissipation hole; 15. Marking part; 16. First step structure; 17. Second step structure; 20. Cover plate; 21. Second connector; 22. Pressing part; 23. Positioning post; 30. Positioning assembly. Detailed Implementation

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0031] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0036] In the production and processing of LED light boards, electronic components such as capacitors and resistors need to be mounted onto the PCB board according to the positions shown on the design circuit diagram. To ensure mounting quality and accuracy, fixtures are also needed to load and position the PCB board. In actual production, component placement can result in component float issues. Due to manufacturing dimensional errors in the pick-and-place machine itself and relative installation position errors between the pick-and-place machine and the PCB board, simply relying on the pressing accuracy of the pick-and-place machine cannot effectively solve the float problem, resulting in poor component mounting quality and affecting circuit and product performance.

[0037] The problem of component floating refers to the phenomenon where components float up and detach from the PCB surface during or after soldering, resulting in an abnormal distance between the component and the PCB. This affects signal transmission and temperature distribution, and may lead to circuit instability or even component detachment from the solder pad, seriously affecting circuit performance.

[0038] To address the problems of the existing technology, this application proposes a novel auxiliary mounting fixture 100. By configuring a cover plate 20 on the fixture body 10 and designing a pressing member 22 on the cover plate 20, the cover plate 20 is placed on the fixture body 10 and the circuit board during or after the component is mounted to the circuit board. With the weight of the cover plate 20, the pressing member 22 can apply pressure to the component that has become displaced, thereby correcting the component and making it re-attach to the circuit board surface, effectively solving the displacement problem.

[0039] See Figure 1 This application illustrates an auxiliary patch fixture 100 according to one embodiment, which includes a fixture body 10 and a cover plate 20. The fixture body 10 has a rectangular structure and can be made of metal. Of course, in other optional embodiments, the shape and material of the fixture body 10 can also be selected according to actual needs.

[0040] Please continue reading. Figure 2 and Figure 3 The fixture body 10 is provided with a loading part 11, which is used to accommodate the circuit board. For example, the loading part 11 is part or all of the upper surface of the fixture body 10. The loading part 11 and the circuit board are in surface-to-surface contact, with a large contact area, which can ensure that the circuit board is placed more stably on the fixture body 10.

[0041] The fixture body 10 is provided with a first connector 12; the cover plate 20 is provided with a second connector 21 and a pressing member 22. The cover plate 20 is provided on the fixture body 10, the first connector 12 is connected to the second connector 21, and the pressing member 22 is used to apply pressure to the components that cause floating on the circuit board to adhere to the circuit board.

[0042] It is easy to understand that the cover plate 20 is preferably made of metal so that the cover plate 20 has a certain weight. This weight acts on the pressing member 22 to ensure that the pressing member 22 can squeeze the floating components down and fit them against the surface of the circuit board.

[0043] Optionally, the pressure member 22 applies pressure to the floating components to adhere to the circuit board, specifically pressure perpendicular to the surface of the circuit board. Of course, in other optional embodiments, this pressure may not be perpendicular to the surface of the circuit board; the appropriate pressure can be selected flexibly according to actual needs.

[0044] In summary, implementing the technical solution of this embodiment will achieve the following beneficial effects: The auxiliary mounting fixture 100 of this solution is applied to the processing of surface mount components on circuit boards. When in use, the circuit board is placed on the loading part 11 of the fixture body 10 for positioning, and then the components are mounted on the surface of the circuit board. During the processing, a cover plate 20 is placed on the circuit board and the fixture body 10. The cover plate 20 is connected to the fixture body 10 by means of the first connector 12 and the second connector 21 to ensure that the cover plate 20 and the fixture body 10 are stably assembled. Since the cover plate 20 is provided with a pressing member 22, the pressing member 22 can apply pressure towards the circuit board to the components that have floated, thereby making the components adhere to the circuit board, thus solving the problem of component float, ensuring high component mounting quality, and avoiding affecting the circuit and product performance.

[0045] In an optional embodiment, one of the first connector 12 and the second connector 21 is a metal part, and the other of the first connector 12 and the second connector 21 is a magnetic part. The magnetic part is magnetically connected to the metal part to apply a pulling force to the cover plate 20 to adhere to the fixture body 10.

[0046] Alternatively, as an alternative to the above embodiments, in another optional embodiment, one of the first connector 12 and the second connector 21 is a magnet, and the other of the first connector 12 and the second connector 21 is a magnetic snap fastener. The magnet and the magnetic snap fastener are magnetically connected to each other to apply a pulling force to the cover plate 20 to adhere to the fixture body 10.

[0047] In the two embodiments described above, the cover plate 20 can be magnetically attracted to the circuit board by the metal parts and the magnetic attractor, and the magnet and the magnetic clasp can be magnetically attracted to each other. The attraction force and the weight of the cover plate 20 are superimposed on the pressing member 22, so that the pressing member 22 has a greater downward pressure on the floating components, ensuring that the components can be effectively pressed down and attached to the surface of the circuit board, thereby improving the reliability and effectiveness of component correction.

[0048] Furthermore, considering that components experiencing floating issues on the circuit board may be located at different positions on the circuit board, the cover plate 20 is provided with multiple pressing members 22 (ten in this application), which are distributed on the cover plate 20. For example, in this application, the cover plate 20 has a ring structure, and the multiple pressing members 22 are arranged at intervals along the inner ring wall of the cover plate 20, thereby adapting to the floating correction needs of different circuit boards and components at different positions on the circuit board, and improving the applicability of the auxiliary mounting fixture 100.

[0049] Based on any of the above embodiments, the pressing member 22 includes an elastic body and a top pressing body. One end of the elastic body is disposed on the cover plate 20, and the other end of the elastic body is connected to the top pressing body. The elastic body has elastic expansion and contraction capabilities. When the cover plate 20 is placed on the fixture body 10 and the circuit board, after the top pressing body abuts against the floating component, the elastic body achieves elastic compression between the top pressing body and the component by contraction and deformation, avoiding excessive compression force that could damage the component.

[0050] For example, the elastic body can be one of a spring or an elastic column. The pressure body can be one of a pin or a pressure block. The specific choice depends on the actual needs.

[0051] Furthermore, the pressing component 22 also includes a guide cylinder, which is disposed on the cover plate 20 with its opening facing the fixture body 10. Both the pressing body and the elastic body are disposed inside the guide cylinder, with the pressing body extending out of the opening. The outer peripheral wall of the pressing body slides in conjunction with the inner wall of the guide cylinder. The inner wall of the guide cylinder guides and limits the extension and retraction of the pressing body and the expansion and contraction of the elastic body, preventing the pressing body from shifting or tilting when it comes into contact with the floating components and is subjected to a reaction force, thus affecting the pressing correction effect.

[0052] Furthermore, to prevent the pressure body from damaging the components, a flexible layer is provided at the end of the pressure body that abuts against the components.

[0053] For example, the flexible layer can be any of the following, including but not limited to rubber, foam, etc., and can be flexibly selected according to actual needs.

[0054] Please continue reading. Figure 2 In addition, in order to improve the installation position accuracy of the circuit board on the fixture body 10, and thus ensure that the component is attached to the circuit board with high position accuracy after the pressure member 22 corrects the floating component, in one embodiment, the auxiliary mounting fixture 100 also includes a plurality of positioning components 30. The plurality of positioning components 30 are disposed on the fixture body 10 and spaced around the outer periphery of the loading part 11. The plurality of positioning components 30 are used to abut and position with the outer periphery of the circuit board.

[0055] Specifically, the positioning component 30 is provided with twelve sets, four sets on each of the two long sides of the fixture body 10 and two sets on each of the two short sides of the fixture body 10. The twelve sets simultaneously abut against the two long sides and two wide sides of the circuit board, thereby reliably restricting the degree of freedom of movement of the circuit board on the fixture body 10 and achieving effective positioning.

[0056] For example, in one embodiment, the positioning component 30 includes a cylinder, a rotating shaft, a positioning block, and a spring. The positioning block is rotatably mounted on the fixture body 10 via the rotating shaft. The cylinder and the spring are respectively mounted on the fixture body 10. The piston rod of the cylinder is connected to the positioning block and is used to drive the positioning block to rotate away from the loading part 11. The spring is connected to the positioning block and applies an elastic force to push the positioning block to rotate towards the loading part 11. Therefore, when the circuit board is installed on the fixture body 10, the piston of the cylinder is first controlled to retract, pulling the positioning block away from the loading part 11, making it easier for the circuit board to be placed into the loading part 11. After the circuit board is placed, the air supply to the cylinder is cut off, and the piston rod of the cylinder no longer exerts a pulling force on the positioning block. The spring, which is in a stretched state, will exert a pulling force on the positioning block because it needs to reset, thereby driving the positioning block to rotate towards the loading part 11 and abut against the edge of the circuit board. Multiple positioning blocks can cooperate to clamp and position the positioning block.

[0057] Please continue reading. Figure 2 In one embodiment, the loading part 11 is a receiving groove recessed into the fixture body 10, and the sidewall of the receiving groove is provided with a notch 111 for avoiding the top corner of the circuit board. The circuit board is placed into the receiving groove, and the sidewall of the groove abuts against the side of the circuit board to form a positioning effect. The top corner of the circuit board extends into the notch 111 and is clearance-fitted with the sidewall of the notch 111 to prevent damage to the top corner of the circuit board.

[0058] Furthermore, the bottom wall of the receiving tank is provided with multiple dispersed clearance slots 112. The clearance slots 112 can avoid components on the circuit board, preventing the fixture body 10 from colliding with the components and causing damage.

[0059] Please continue reading. Figure 2 and Figure 3 In order to further improve the stability and reliability of the cover plate 20 installed on the fixture body 10, one of the fixture body 10 and the cover plate 20 is provided with at least two positioning holes 13, and the other of the fixture body 10 and the cover plate 20 is provided with at least two positioning posts 23, and the positioning posts 23 are inserted into the positioning holes 13 one by one.

[0060] Preferably, multiple positioning holes 13 and positioning posts 23 are provided and are assembled in a distributed and corresponding manner to improve the positioning effect.

[0061] In addition, the fixture body 10 is provided with a plurality of heat dissipation holes 14, which are arranged around the outer periphery of the loading part 11. When electronic components are mounted on the circuit board and reflow soldering is performed, hot air can pass through each heat dissipation hole 14 so that the fixture body 10 can be heated evenly.

[0062] Understandably, the heat dissipation holes 14 are through holes that penetrate the thickness direction of the fixture body 10, and can be regular or irregular shapes such as round holes, square holes, and triangular holes. For example, in this application, the loading part 11 is rectangular, and a plurality of circular heat dissipation holes 14 are arranged in equal numbers and evenly spaced on the outer sides of the four sides of the loading part 11.

[0063] Furthermore, the fixture body 10 is also provided with an identification section 15, which is located on the outside of the loading section 11. For example, the identification section 15 may be an identification code composed of letters and / or numbers, used to number the auxiliary patch fixture 100 so as to manage the storage, retrieval and other functions of the auxiliary patch fixture 100.

[0064] Please continue reading. Figure 2 and Figure 4The auxiliary mounting fixture 100 needs to be placed into the production line and automatically rotated under the drive of the conveyor track. The fixture body 10 has a first step structure 16 and a second step structure 17 on opposite sides. The first step structure 16 and the second step structure 17 form an overlapping edge, which allows the auxiliary mounting fixture 100 to be conveniently and effectively assembled and positioned on the conveyor track, and to move along the conveyor track to realize the automatic mounting of circuit boards on the auxiliary mounting fixture 100.

[0065] In addition to the above, this application also provides a surface mount device, which includes the auxiliary mounting fixture 100 as described in any of the above embodiments.

[0066] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. An auxiliary patch fixture, characterized in that, include: The fixture body has a loading part for accommodating a circuit board, and a first connector is provided on the fixture body; as well as A cover plate is provided with a second connector and a pressing member. The cover plate is disposed on the main body of the fixture. The first connector is connected to the second connector. The pressing member is used to apply pressure to the components that cause floating on the circuit board to adhere to the circuit board.

2. The auxiliary patch fixture according to claim 1, characterized in that, One of the first connector and the second connector is a metal part, and the other of the first connector and the second connector is a magnetic part. The magnetic part is magnetically connected to the metal part to apply a pulling force to the cover plate to adhere to the main body of the fixture. Alternatively, one of the first connector and the second connector may be a magnet, and the other of the first connector and the second connector may be a magnetic snap fastener. The magnet and the magnetic snap fastener are magnetically connected to apply a pulling force to the cover plate to adhere to the main body of the fixture.

3. The auxiliary patch fixture according to claim 1, characterized in that, The pressing component includes an elastic body and a pressing body. One end of the elastic body is disposed on the cover plate, and the other end of the elastic body is connected to the pressing body.

4. The auxiliary patch fixture according to claim 3, characterized in that, The pressing component also includes a guide cylinder, which is disposed on the cover plate and has its opening facing the fixture body. The pressing body and the elastic body are both disposed inside the guide cylinder, and the pressing body extends out of the opening of the guide cylinder. The outer peripheral wall of the pressing body slides in conjunction with the inner wall of the guide cylinder.

5. The auxiliary patch fixture according to claim 3, characterized in that, The end of the pressure body used to abut against the component is provided with a flexible layer.

6. The auxiliary patch fixture according to claim 1, characterized in that, The auxiliary patch fixture also includes multiple positioning components, which are disposed on the fixture body and spaced apart around the outer periphery of the loading part. The multiple positioning components are used to abut and position against the outer periphery of the circuit board.

7. The auxiliary patch fixture according to claim 1, characterized in that, The loading part is a receiving groove recessed into the main body of the fixture, and the sidewall of the receiving groove is provided with a notch for avoiding the top corner of the circuit board.

8. The auxiliary patch fixture according to claim 7, characterized in that, The bottom wall of the receiving tank has multiple dispersed clearance slots.

9. The auxiliary patch fixture according to claim 1, characterized in that, One of the fixture body and the cover plate is provided with at least two positioning holes, and the other of the fixture body and the cover plate is provided with at least two positioning posts, which are inserted into the positioning holes one by one.

10. The auxiliary patch fixture according to claim 1, characterized in that, The fixture body is also provided with a plurality of heat dissipation holes, which are arranged around the outer periphery of the loading part.

11. The auxiliary patch fixture according to claim 1, characterized in that, The fixture body is also provided with an identification part, which is located on the outside of the loading part.

12. The auxiliary patch fixture according to claim 1, characterized in that, The fixture body has a first step structure and a second step structure on its opposite sides.

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