Circuit board assembly welding jig

Abstract

The invention discloses a circuit board assembly welding jig, and relates to the technical field of printed circuits. The circuit board assembly welding jig comprises a rack, a pre-fixing mechanism and a supporting mechanism. When the circuit board assembly needs to be fixed, firstly, the pre-fixing mechanism is moved to enable the size of the pre-fixing mechanism in the first direction to be matched with the size of the circuit board assembly, and the edge of the circuit board assembly is clamped, so that preliminary fixing of the circuit board assembly is achieved; the pre-fixing mechanism is configured to have the clamping size variable in the height direction so as to be matched with the size of the circuit board assembly in the height direction. The supporting mechanism moves in the height direction to be matched with the size of the circuit board assembly in the height direction. The supporting mechanism is used for abutting against the inner area of the circuit board assembly to conduct auxiliary fixing on the circuit board assembly, and therefore fixing of the circuit board assembly can be completed. The circuit board assembly welding jig can be suitable for different circuit board assemblies and is good in universality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printed circuit, and particularly relates to a circuit board assembly welding jig. BACKGROUND

[0002] Reflow soldering is a commonly used technology in the field of electronic manufacturing. Reflow soldering provides a high-temperature environment, such as heating air or nitrogen to a high enough temperature and blowing it to a circuit board on which components have been attached, so that the solder paste is melted by heat, and the surface-mounted components and the circuit board assembly pads are reliably combined together through the solder paste.

[0003] In the related art, the circuit board assembly welding jig usually adopts a rigid frame structure, and the circuit board assembly is clamped in the jig through a fixed clamp or a spring clamp.

[0004] However, different types of circuit board assemblies require different types of customized jigs, which is time-consuming and costly to replace. SUMMARY

[0005] The present application provides a circuit board assembly welding jig to at least solve the problem of poor versatility of the circuit board assembly welding jig in the related art.

[0006] The present application provides a circuit board assembly welding jig, comprising:

[0007] a rack;

[0008] a pre-fixing mechanism movably connected with the rack, the pre-fixing mechanism being configured to move relatively along a first direction of the rack to match the size of the circuit board assembly along the first direction, and the pre-fixing mechanism being configured to have a variable clamping size along a height direction to match the size of the circuit board assembly along the height direction, wherein the first direction is parallel to a horizontal plane;

[0009] a supporting mechanism movably connected with the rack, the supporting mechanism being configured to move along the height direction to match the size of the circuit board assembly along the height direction.

[0010] The circuit board assembly welding jig provided by the present application comprises a rack, a pre-fixing mechanism and a supporting mechanism. When the circuit board assembly needs to be fixed, the pre-fixing mechanism is first moved to match the size of the circuit board assembly along the first direction, and the edges of the circuit board assembly are clamped to achieve preliminary fixation of the circuit board assembly. The pre-fixing mechanism is configured to have a variable clamping size along the height direction to match the size of the circuit board assembly along the height direction. The supporting mechanism is moved along the height direction to match the size of the circuit board assembly along the height direction. The supporting mechanism abuts against the internal area of the circuit board assembly to assist in fixing the circuit board assembly, so that the fixation of the circuit board assembly can be completed. In this way, the circuit board assembly welding jig can be applied to different circuit board assemblies, and has good versatility. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0012] Figure 1 A sectional view of the structure of the circuit board assembly welding jig provided by the present application;

[0013] Figure 2 A side view of the circuit board assembly welding jig provided by the present application;

[0014] Figure 3 A top view of the second rack and the pre-fixing mechanism in the circuit board assembly welding jig provided by the present application;

[0015] Figure 4 A side sectional view of the second rack and the pre-fixing mechanism in the circuit board assembly welding jig provided by the present application;

[0016] Figure 5 A sectional view of the structure of the circuit board assembly welding jig provided by the present application; Figure 1 A partial enlarged view of A in FIG. 1;

[0017] Figure 6 A sectional view of the structure of the circuit board assembly welding jig provided by the present application; Figure 1 A partial enlarged view of B in FIG. 1.

[0018] Among the above drawings, the following reference signs are included:

[0019] 100 - first rack; 110 - lifting rod; 120 - fixing plate; 130 - extension plate;

[0020] 200 - second rack;

[0021] 300 - pre-fixing mechanism; 310 - clamping assembly; 311 - positioning piece; 312 - adjusting structure; 3121 - adjusting nut; 3122 - adjusting rod; 313 - fixing piece; 320 - locking assembly; 321 - locking piece;

[0022] 400 - support mechanism; 410 - top support assembly; 411 - first connecting plate; 4111 - first connecting slot; 412 - first support piece; 4121 - first recess; 413 - second support piece; 414 - first connecting structure; 4141 - first elastic piece; 4142 - first locking ball; 415 - first pressure sensor; 420 - bottom support assembly; 421 - second connecting plate; 4211 - second connecting slot; 422 - third support piece; 4221 - second recess; 423 - fourth support piece; 424 - second connecting structure; 4241 - second elastic piece; 4242 - second locking ball; 425 - second pressure sensor; 430 - driving assembly; 431 - first lifting plate; 432 - first connecting rod; 433 - rotating plate; 434 - second connecting rod; 435 - second lifting plate; 436 - driving piece;

[0023] 500 - circuit board assembly. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0025] It should be noted that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. The terms "mount", "connect", "connect" should be broadly understood, for example, it can be fixed connection, or detachable connection, or integral connection; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication inside two elements. The terms "parallel", "perpendicular", "equal" include the described case and the approximate case of the described case, and the approximate case is within the acceptable deviation range, wherein the acceptable deviation range is determined by the ordinary skilled in the art considering the measurement being discussed and the error related to the measurement of the specific quantity (i.e. the limitation of the measurement system). For example, "parallel" includes absolute parallel and approximate parallel, wherein the acceptable deviation range of approximate parallel can be, for example, within 5°; "perpendicular" includes absolute perpendicular and approximate perpendicular, wherein the acceptable deviation range of approximate perpendicular can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, that the difference between the two equalities is less than or equal to 5% of either. For the ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood in specific cases.

[0026] The terms "first", "second", "third" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar or similar objects or entities, and do not necessarily mean to limit the specific order or sequence, unless otherwise specified. It should be understood that the terms used in this way can be interchanged under appropriate circumstances.

[0027] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with the drawings and specific embodiments.

[0028] In the related art, in the reflow soldering process, the circuit board assembly needs to undergo high-temperature heating (usually 200-260°C) to melt the solder paste and complete the welding of components. Due to thermal expansion and warping deformation of the circuit board assembly at high temperature, if not effectively fixed and supported by the jig, it may lead to reduced welding quality, component displacement, and even damage to the circuit board assembly. Therefore, the soldering jig plays a key role in fixing the position of the circuit board assembly, suppressing thermal deformation, and ensuring the stability of the welding process during reflow soldering. However, the models and sizes of circuit board assemblies vary greatly (such as different sizes of mainboards, sub-boards, flexible boards, etc.), and traditional jigs need to be designed and manufactured separately for each model, resulting in frequent equipment replacement and low production efficiency.

[0029] To solve the above technical problems, the circuit board assembly soldering jig provided by the embodiments of the present application comprises a rack, a pre-fixing mechanism and a supporting mechanism. When the circuit board assembly needs to be fixed, first move the pre-fixing mechanism so that the size of the pre-fixing mechanism along the first direction matches the size of the circuit board assembly, and clamp the edge of the circuit board assembly to achieve the preliminary fixation of the circuit board assembly. The pre-fixing mechanism is configured to clamp the size along the height direction, which can be changed to match the size along the height direction of the circuit board assembly. The supporting mechanism is moved along the height direction to match the size of the circuit board assembly along the height direction. The supporting mechanism abuts against the internal area of the circuit board assembly to assist in fixing the circuit board assembly, so that the fixation of the circuit board assembly can be completed. In this way, the circuit board assembly soldering jig can be applied to different circuit board assemblies, and has good versatility.

[0030] Figure 1 A cross-sectional view of the circuit board assembly soldering jig provided by the present application. Figure 2 A side view of the circuit board assembly soldering jig provided by the present application.

[0031] Referring to Figure 1 and Figure 2 , the circuit board assembly soldering jig provided by the embodiments of the present application is shown.

[0032] In some embodiments, the circuit board assembly soldering jig comprises a rack. The rack comprises a first rack 100.

[0033] Specifically, the first rack 100 comprises a fixed plate and at least two lifting rods 110. Exemplarily, the number of lifting rods 110 is two, and the two lifting rods 110 are arranged at intervals, and both of the two lifting rods 110 are connected with the fixed plate 120.

[0034] Figure 3 A top view of the second rack and the pre-fixing mechanism in the circuit board assembly soldering jig provided by the present application. Figure 4 A side cross-sectional view of the second rack and the pre-fixing mechanism in the circuit board assembly soldering jig provided by the present application.

[0035] Referring to Figure 3 and Figure 4 As shown in FIG. 1, in some embodiments, the rack includes a second rack 200. The second rack 200 is fixedly connected with the first rack 100.

[0036] Exemplarily, the second rack 200 can be a hollow frame structure, and the second rack 200 includes a top frame, a bottom frame, and four connecting wall plates located between the top frame and the bottom frame. The top frame includes four side columns connected in sequence. The bottom frame includes four side columns connected in sequence.

[0037] In some embodiments, the circuit board assembly welding jig includes a pre-fixing mechanism 300.

[0038] The pre-fixing mechanism 300 includes two clamping assemblies 310. The two clamping assemblies 310 are movably connected with the second rack 200, and the two clamping assemblies 310 are moved relative to each other along a first direction of the first rack 100 to match the size of the circuit board assembly 500 along the first direction. The clamping assembly 310 is used to clamp the edge of the circuit board assembly 500.

[0039] The clamping assembly 310 is configured to clamp the size in the height direction to match the size of the circuit board assembly 500 in the height direction. The clamping assembly 310 can be a spring locking assembly, or the clamping assembly 310 can be a clamping assembly with adjustable opening spacing in the height direction, so as to adapt to circuit board assemblies 500 of different height sizes. The height direction is the direction indicated by the Z axis.

[0040] The pre-fixing mechanism 300 includes two locking assemblies 320. The two locking assemblies 320 are arranged one by one corresponding to the two clamping assemblies 310. The locking assembly 320 is connected with the second rack 200 and the clamping assembly 310 respectively to fix the position of the clamping assembly 310 along the first direction, wherein the first direction is parallel to the horizontal plane. The first direction is the direction indicated by the X axis.

[0041] Specifically, one guide groove is arranged on each of the two connecting walls opposite to each other along a second direction. The guide groove extends along the first direction, and the clamping assembly 310 is slidably connected with the guide groove. The second direction is the direction indicated by the Y axis.

[0042] In some embodiments, the circuit board assembly welding jig comprises a support mechanism 400. Wherein the support mechanism 400 comprises a top support assembly 410 and a bottom support assembly 420. The top support assembly 410 and the bottom support assembly 420 are both movably connected with the first rack 100, the top support assembly 410 is located above the pre-fixing mechanism 300, and the bottom support assembly 420 is located at the bottom of the pre-fixing mechanism 300. The top support assembly 410 and the bottom support assembly 420 are used to abut the inner area of the circuit board assembly 500. It can be understood that the top support assembly 410 abuts the top of the circuit board assembly 500, and the bottom support assembly 420 abuts the top of the circuit board assembly 500. The inner area is the position of the circuit board assembly 500 excluding the edge when viewed from above.

[0043] The top support assembly 410 and the bottom support assembly 420 move along the height direction, and the distance between the top support assembly 410 and the bottom support assembly 420 is adjusted to match the size of the circuit board assembly 500 along the height direction.

[0044] In some embodiments, the circuit board assembly welding jig comprises a drive assembly 430. The top support assembly 410 and the bottom support assembly 420 are both movably connected with the first rack 100, the top support assembly 410 is located above the pre-fixing mechanism 300, and the bottom support assembly 420 is located at the bottom of the pre-fixing mechanism 300. The top support assembly 410 and the bottom support assembly 420 are used to abut the inner area of the circuit board assembly 500.

[0045] The drive assembly 430 drives the top support assembly 410 and the bottom support assembly 420 to move along the height direction, and adjusts the distance between the top support assembly 410 and the bottom support assembly 420 to match the size of the circuit board assembly 500 along the height direction.

[0046] When the circuit board assembly welding jig needs to fix the circuit board assembly 500, first, move the two clamping assemblies 310 so that the size of the two clamping assemblies 310 along the first direction matches the size of the circuit board assembly 500, lock the position of the clamping assembly 310 by using the locking assembly 320, clamp the edge of the circuit board assembly 500 by using the locking assembly 320 to achieve the preliminary fixation of the circuit board assembly 500, drive the top support assembly 410 and the bottom support assembly 420 to move along the height direction by using the driving assembly 430, adjust the distance between the top support assembly 410 and the bottom support assembly 420 to match the size of the circuit board assembly 500 along the height direction, and fix the circuit board assembly 500 by using the top support assembly 410 and the bottom support assembly 420 to abut against the internal area of the circuit board assembly 500, so that the fixation of the circuit board assembly 500 can be completed. In this way, the circuit board assembly welding jig can be suitable for different circuit board assemblies 500, and has good versatility. Moreover, the fixation of the circuit board assembly 500 is realized by cooperation of the top support assembly 410, the bottom support assembly 420 and the clamping assembly 310, and the fixation effect is good when the size of the circuit board assembly 500 is large.

[0047] Figure 5 For Figure 1 A local enlarged view of the middle A.

[0048] Referring to Figure 1 and Figure 5 As shown in FIGS. 1 and 2, in some embodiments, the top support assembly 410 includes a first connecting plate 411. The first connecting plate 411 can be in the shape of a rectangular plate.

[0049] The first connecting plate 411 is connected with the driving assembly 430, and the horizontal projection of the clamping assembly 310 is located in the horizontal projection of the first connecting plate 411. In this way, the size of the first connecting plate 411 is large, and can better match the positioning requirements of circuit board assemblies 500 of different sizes.

[0050] The top support assembly 410 includes a plurality of first support pieces 412, which are arrayed at the bottom of the first connecting plate 411.

[0051] The top support assembly 410 includes at least one second support piece 413, the number of the second support pieces 413 is less than the number of the first support pieces 412, and the at least one second support piece 413 is selectively arranged at the bottom of different first support pieces 412, and the second support piece 413 is used for abutting against the circuit board assembly 500. That is, the number and installation position of the second support piece 413 can be selected according to requirements. One second support piece 413 is arranged on one first support piece 412. The second support piece 413 is detachably connected with the first support piece 412.

[0052] It should be noted that in a high temperature environment, the circuit board assembly 500 is prone to thermal expansion and warping. The traditional fixture rigidly fixes the entire periphery of the circuit board assembly 500, which can easily cause damage to both. In the circuit board assembly welding fixture provided in the embodiment, the top support assembly 410 includes a first connecting plate 411, a first support 412, and a second support 413. The second support 413 is selectively arranged at the bottom of different first supports 412, and the second support 413 is used to abut against the circuit board assembly 500. In this way, different positions of the circuit board assembly 500 can be abutted according to requirements, and the force applied to the circuit board assembly 500 by multi-position fixing is more dispersed, so as to avoid damage to the circuit board assembly 500 and the circuit board assembly welding fixture.

[0053] In some embodiments, the number of second supports 413 is at least two. In this way, multi-point support of the circuit board assembly 500 can be achieved, and the reliability of the fixation of the circuit board assembly 500 is improved. Moreover, multi-point distributed support is conducive to reducing the stress concentration of the circuit board assembly 500.

[0054] In some embodiments, the number of second supports 413 is at least two, and the outer wall size of the end of different second supports 413 away from the first support 412 is different.

[0055] Specifically, the second supports 413 of different sizes can be selected according to the size, thickness of the circuit board assembly 500, and the distribution of devices of the circuit board assembly 500, and installed on the first support 412 based on different positions to support the circuit board assembly 500. For example, when the space of the position to be supported is small, the second support 413 with a small outer wall size at the end away from the first support 412 can be selected.

[0056] In some embodiments, the number of second supports 413 is at least two, and the sizes of different second supports 413 in the height direction are different. In this way, the abutting force on the circuit board assembly 500 can be adjusted. For example, different lengths of the second supports 413 are used to abut against the circuit board assembly 500, and shorter second supports 413 are used at positions where the deformation of the circuit board assembly 500 is large, so as to reduce the abutting force on the circuit board assembly 500, and avoid damage to the circuit board assembly 500 and the circuit board assembly welding fixture. Or it can be used to match with different height planes on the circuit board assembly 500.

[0057] In some embodiments, the first support 412 is integrally arranged with the first connecting plate 411. In this way, only the second support 413 needs to be installed on the first support 412, and the installation efficiency is higher.

[0058] Referring to Figure 1 andFigure 5 As shown, in some other embodiments, the top support assembly 410 further comprises a plurality of first connecting structures 414, and the first support 412 is detachably connected with the first connecting plate 411 through the first connecting structures 414. In this way, the second support 413 can be fixed on the first support 412 first, and then the first support 412 and the second support 413 are integrally installed on the first connecting plate 411. The first support 412 and the second support 413 have a large overall size, which is convenient for operation.

[0059] In some embodiments, one first support 412 can be connected with the first connecting plate 411 through two first connecting structures 414. In this way, the reliability of the connection can be improved.

[0060] In some embodiments, the first connecting structure 414 comprises a first elastic member 4141. The bottom of the first connecting plate 411 is provided with a plurality of first connecting grooves 4111 arranged in an array, and the first elastic member 4141 is located in the first connecting groove 4111 and connected with the side wall of the first connecting groove 4111.

[0061] Exemplarily, the first connecting grooves 4111 can be arranged in an array along the first direction and the second direction.

[0062] In some embodiments, the first connecting structure 414 comprises a first locking ball 4142. The first locking ball 4142 is located in the first connecting groove 4111 and connected with the first elastic member 4141. The side wall of the first support 412 is provided with a first recess 4121 matched with the first locking ball 4142. The first support 412 is inserted into the first connecting groove 4111, and the first locking ball 4142 is clamped with the first recess 4121.

[0063] Specifically, the first connecting groove 4111 comprises a first main groove and two first auxiliary grooves located on the opposite sides of the first main groove, and the two first auxiliary grooves are respectively communicated with the first main groove. In the height direction, the two first auxiliary grooves are located at the upper part of the first main groove, and the size of the first auxiliary groove is smaller than that of the first main groove. The two first elastic members 4141 are respectively installed in the two first auxiliary grooves. The inner wall size of the first auxiliary groove is matched with the outer wall size of the first support 412.

[0064] In some embodiments, the inner wall size of the first main groove can be greater than the outer wall size of the first elastic member 4141, and the inner wall size of the first main groove can be smaller than the diameter of the first locking ball 4142.

[0065] When the first support 412 is installed, the first support 412 is inserted into the first main groove, the first support 412 is pushed upward, the first support 412 pushes the first locking balls 4142 on both sides away from each other, until the first locking balls 4142 are clamped in the first recess 4121, thereby completing the connection of the first support 412. When the first support 412 is disassembled, the first support 412 is pulled downward, the first recess 4121 of the first support 412 is disengaged from the first locking ball 4142, thereby completing the disassembly of the first support 412. It can be understood that the first elastic member 4141 and the first locking ball 4142 realize the detachable connection of the first support 412 and the first connecting plate 411, and the connection reliability is high and the operation convenience is high.

[0066] Specifically, the first elastic member 4141 can be a spring or elastic rubber. The first locking ball 4142 can be a steel ball.

[0067] In some embodiments, the top support assembly 410 further comprises a first pressure sensor 415 located between the first locking ball 4142 and the first recess 4121, and the first pressure sensor 415 is configured to detect the pressure on the first locking ball 4142. It can be understood that by setting the first pressure sensor 415, it can be more intuitive to know whether the first support 412 is installed in place. For example, when the pressure sensor detection value is within the preset pressure interval, it means that the first support 412 is installed in place. Specifically, the first pressure sensor 415 can be embedded on the first locking ball 4142, or the first pressure sensor 415 can be pasted on the first locking ball 4142.

[0068] In some embodiments, the first pressure sensor 415 is arranged one-to-one with the first locking ball 4142. In this way, when one first support 412 is connected to the first connecting plate 411 through two first connecting structures 414, the detection values of the two first pressure sensors located in the same first connecting groove 4111 are within the preset pressure interval, indicating that the first support 412 is installed in place. If none of them is within the preset pressure interval, it means that the first support 412 is not installed in place. If one of them is not within the preset pressure interval and the other is within the preset pressure interval, it means that the first pressure sensor 415 fails.

[0069] In other embodiments, the first support 412 is detachably connected to the first connecting plate 411. The second support 413 is integrally arranged with the first support 412. In this way, only the first support 412 and the second support 413 are installed on the first connecting plate 411 as a whole, and the installation efficiency is high.

[0070] In some embodiments, the first support 412 and the second support 413 are made of different materials, and the second support 413 has a smaller hardness than the first support 412. In this way, the damage to the circuit board assembly 500 can be reduced, and the first support 412 is not easily damaged during plugging. The first support 412 and the second support 413 can be detachably connected, and the processing difficulty of both is relatively small. For example, the material of the second support 413 can be rubber or silicone, and the material of the first support 412 can be metal or plastic.

[0071] Figure 6 For Figure 1 a local enlarged view of B in the middle.

[0072] Referring to Figure 1 and Figure 6 shown, in some embodiments, the bottom support assembly 420 includes a second connecting plate 421, the second connecting plate 421 is connected with the driving assembly 430, and the orthographic projection of the clamping assembly 310 towards the horizontal plane is located within the orthographic projection of the second connecting plate 421 towards the horizontal plane. In this way, the second connecting plate 421 has a larger size, which can better match the positioning needs of circuit board assemblies 500 of different sizes.

[0073] In some embodiments, the bottom support assembly 420 includes a plurality of third supports 422, and the plurality of third supports 422 are arrayed on the top of the second connecting plate 421.

[0074] In some embodiments, the bottom support assembly 420 includes at least one fourth support 423, the number of the fourth support 423 is less than the number of the third support 422, and the at least one fourth support 423 is selectively arranged on the top of different third supports 422, and the fourth support 423 is used to abut against the circuit board assembly 500. That is, the number and installation position of the fourth support 423 can be selected according to needs. One fourth support 423 is arranged on one third support 422. The third support 422 and the fourth support 423 are detachably connected, for example, the third support 422 and the fourth support 423 can be inserted.

[0075] It should be noted that in a high temperature environment, the circuit board assembly 500 is prone to thermal expansion and warping. The traditional fixture rigidly fixes the entire circuit board assembly 500, which can easily cause damage to both. In the circuit board assembly welding fixture provided in the embodiment, the top support assembly 410 includes a second connecting plate 421, a third support 422, and a fourth support 423. The fourth support 423 is selectively arranged on the top of different third supports 422, and the fourth support 423 is used to abut against the circuit board assembly 500. In this way, the different positions of the circuit board assembly 500 can be abutted according to the needs, and the positions with a larger deformation amount during the welding of the circuit board assembly 500 can be supported, thereby reducing the deformation amount. Moreover, using multiple positions to support can exert a more dispersed force on the circuit board assembly 500, which is less likely to cause damage to the circuit board assembly 500 and the circuit board assembly welding fixture.

[0076] In some embodiments, the number of fourth supports 423 is at least two. In this way, multi-point support of the circuit board assembly 500 can be achieved, and the reliability of the fixation of the circuit board assembly 500 can be improved. A more dispersed force is exerted on the circuit board assembly 500, which is less likely to cause damage to the circuit board assembly 500 and the circuit board assembly welding fixture.

[0077] In some embodiments, the number of fourth supports 423 is at least two, and the outer wall size of the end of each fourth support 423 away from the third support 422 is different.

[0078] Specifically, the fourth supports 423 of different sizes can be selected according to the size, thickness of the circuit board assembly 500, and the distribution of devices of the circuit board assembly 500, and installed on the third support 422 based on different positions to support the circuit board assembly 500. The outer wall size refers to the diameter size.

[0079] In some embodiments, the number of fourth supports 423 is at least two, and the sizes of the fourth supports 423 in the height direction are different.

[0080] In this way, the abutting force on the circuit board assembly 500 can be adjusted. The fourth supports 423 of different lengths are used to abut against the circuit board assembly 500, and shorter fourth supports 423 are used near the positions with a larger deformation amount of the circuit board assembly 500, thereby reducing the abutting force on the circuit board assembly 500, which is less likely to cause damage to the circuit board assembly 500 and the circuit board assembly welding fixture. Alternatively, the fourth supports 423 can abut against the surfaces with different heights of the circuit board assembly 500.

[0081] In some embodiments, the third support 422 is integrally connected with the second connecting plate 421. In this way, only the fourth supports 423 need to be installed on the third support 422, and the installation efficiency is higher.

[0082] In some embodiments, the bottom support assembly 420 further comprises a plurality of second connecting structures 424, the third support 422 is detachably connected with the first connecting plate 411 through the second connecting structures 424. In this way, the fourth support 423 can be fixed on the third support 422 first, and then the fourth support 423 and the third support 422 are integrally installed on the first connecting plate 411. The overall size of the fourth support 423 and the third support 422 is larger, which is convenient for installation.

[0083] In some embodiments, one third support 422 can be connected with the first connecting plate 411 through two second connecting structures 424. In this way, the reliability of the connection can be improved.

[0084] In some embodiments, the second connecting structure 424 comprises a second elastic member 4241. The top of the second connecting plate 421 is provided with a plurality of arrayed second connecting grooves 4211, the second elastic member 4241 is located in the second connecting groove 4211, and the second elastic member 4241 is connected with the side wall of the second connecting groove 4211.

[0085] Exemplarily, the second connecting grooves 4211 can be arrayed along the first direction and the second direction. Exemplarily, the second connecting grooves 4211 and the first connecting grooves 4111 can be arranged one by one, that is, the arrangement modes of the second connecting grooves 4211 and the first connecting grooves 4111 are the same.

[0086] In some embodiments, the second connecting structure 424 comprises a second locking ball 4242, the second locking ball 4242 is located in the second connecting groove 4211, the second locking ball 4242 is connected with the second elastic member 4241, the side wall of the third support 422 is provided with a second recess 4221 matched with the second locking ball 4242, the third support 422 is inserted in the second connecting groove 4211, and the second locking ball 4242 is clamped with the second recess 4221.

[0087] Specifically, the second connecting groove 4211 comprises a second main groove and two first auxiliary grooves located on the opposite sides of the second main groove, and two second auxiliary grooves respectively communicated with the second main groove. In the height direction, the two second auxiliary grooves are located at the upper part of the second main groove, and the size of the second auxiliary groove is smaller than that of the second main groove. The two second elastic members 4241 are respectively installed in the two second auxiliary grooves. The inner wall size of the second auxiliary groove matches the outer wall size of the third support 422.

[0088] When the third support 422 is installed, the third support 422 is inserted into the second main groove, the third support 422 is pushed downward, the two second locking balls 4242 on the two sides are pushed away from each other, until the second locking balls 4242 are clamped in the second recess 4221, so that the connection of the third support 422 is completed. When the third support 422 is disassembled, the third support 422 is pulled upward, the second recess 4221 of the third support 422 is separated from the second locking ball 4242, so that the disassembly of the third support 422 is completed. It can be understood that the second elastic member 4241 and the second locking ball 4242 realize the detachable connection of the third support 422 and the second connecting plate 421, the connection reliability is higher, and the operation convenience is higher.

[0089] Specifically, the second elastic member 4241 can be a spring or elastic rubber. The second locking ball 4242 can be a steel ball.

[0090] In some embodiments, the bottom support assembly 420 further comprises a second pressure sensor 425, the second pressure sensor 425 is located between the second locking ball 4242 and the second recess 4221, and the second pressure sensor 425 is configured to detect the pressure borne by the second locking ball 4242. It can be understood that by setting the second pressure sensor 425, it can be more intuitive to know whether the third support 422 is installed in place. For example, when the pressure sensor detection value is in the preset pressure interval, it means that the third support 422 is installed in place. Specifically, the second pressure sensor 425 can be embedded on the second locking ball 4242, or the second pressure sensor 425 can be pasted on the second locking ball 4242.

[0091] In some embodiments, the second pressure sensor 425 is arranged one by one with the second locking ball 4242. In this way, when one third support 422 is connected to the second connecting plate 421 through two second connecting structures 424, the detection values of the two second pressure sensors located in the same second connecting groove 4211 are in the preset pressure interval, which means that the third support 422 is installed in place. If none of them is in the preset pressure interval, it means that the third support 422 is not installed in place. If one of them is not in the preset pressure interval and the other is in the preset pressure interval, it means that the second pressure sensor 425 fails.

[0092] In some embodiments, the third support 422 and the fourth support 423 are made of different materials, and the hardness of the fourth support 423 is less than that of the third support 422. In this way, it is beneficial to reduce the damage to the circuit board assembly 500. Moreover, the fourth support 423 is not easy to be damaged during installation and disassembly, and the third support 422 and the fourth support 423 are detachably connected, which is convenient for processing of the two.

[0093] Exemplarily, the fourth support 423 can be made of rubber or silicone, and the third support 422 can be made of metal or plastic.

[0094] In some other embodiments, the third support 422 is detachably connected with the second connecting plate 421. The third support 422 is integrally arranged with the fourth support 423. In this way, the third support 422 and the fourth support 423 are integrally installed on the second connecting plate 421, and the installation efficiency is relatively high.

[0095] Referring to Figure 2 In some embodiments, the driving assembly 430 includes a first lifting plate 431. The first lifting plate 431 is slidably connected with the first rack 100, and the first lifting plate 431 is connected with the first connecting plate 411.

[0096] Specifically, the first lifting plate 431 is slidably connected with the two lifting rods 110 respectively.

[0097] The driving assembly 430 includes a first connecting rod 432, and the first connecting rod 432 is rotatably connected with the first lifting plate 431.

[0098] The driving assembly 430 includes a rotating plate 433, and the rotating plate 433 is rotatably connected with the first rack 100. The first connecting rod 432 is rotatably connected with the rotating plate 433.

[0099] The driving assembly 430 includes a second connecting rod 434, and the second connecting rod 434 is rotatably connected with the rotating plate 433.

[0100] Specifically, the rotating plate 433 can be rotatably connected with the fixed plate 120. The rotation center of the rotating plate 433 can be located at the center position of the rotating plate 433. The rotatable connection point between the second connecting rod 434 and the rotating plate 433 and the rotatable connection point between the first connecting rod 432 and the rotating plate 433 are located on opposite sides of the center position of the rotating plate 433.

[0101] Specifically, the fixed plate 120 can be connected with the second rack 200 through the extension plate 130.

[0102] The driving assembly 430 includes a second lifting plate 435. The second lifting plate 435 is slidably connected with the first rack 100, and the second lifting plate 435 is connected with the second connecting plate 421. The second lifting plate 435 is rotatably connected with the second connecting rod 434.

[0103] Specifically, the second lifting plate 435 is slidably connected with the two lifting rods 110 respectively.

[0104] The driving assembly 430 comprises a driving member 436, a driving shaft of the driving member 436 is connected with the second lifting plate 435, the driving member 436 drives the second lifting plate 435 to move along the height direction, the second lifting plate 435 drives the second connecting rod 434, the rotating plate 433 and the first connecting rod 432 to rotate, the first connecting rod 432 drives the first lifting plate 431 to move along the height direction, so that the first lifting plate 431 and the second lifting plate 435 are close to or away from each other.

[0105] Specifically, referring to Figure 2 As shown in the figure, the driving member 436 drives the second lifting plate 435 to move downward along the height direction, the second lifting plate 435 drives the rotating plate 433 to rotate clockwise through the second connecting rod 434, the rotating plate 433 drives the first lifting plate 431 to move upward along the height direction through the first connecting rod 432, so that the first lifting plate 431 and the second lifting plate 435 are away from each other. The driving member 436 drives the second lifting plate 435 to move upward along the height direction, the second lifting plate 435 drives the rotating plate 433 to rotate counterclockwise through the second connecting rod 434, the rotating plate 433 drives the first lifting plate 431 to move downward along the height direction through the first connecting rod 432, so that the first lifting plate 431 and the second lifting plate 435 are close to each other.

[0106] Specifically, the driving member 436 can be an electric cylinder or a hydraulic cylinder. The driving member 436 is fixedly connected with the first rack 100.

[0107] It can be understood that, by arranging the driving member 436, the first connecting rod 432, the second connecting rod 434, the rotating plate 433, the first lifting plate 431 and the second lifting plate 435, one driving member 436 is used to drive the first lifting plate 431 and the second lifting plate 435 to be close to or away from each other, which is beneficial to save cost and improve the synchronization of the movement of the first lifting plate 431 and the second lifting plate 435.

[0108] Referring to Figure 3 and Figure 4 As shown in the figure, in some embodiments, the clamping assembly 310 comprises a positioning member 311, the positioning member 311 is slidingly connected with the second rack 200.

[0109] The clamping assembly 310 comprises an adjusting structure 312, the adjusting structure 312 is movably connected with the positioning member 311.

[0110] The clamping assembly 310 comprises a fixing member 313, the adjusting structure 312 is fixedly connected with the fixing member 313, the adjusting structure 312 moves along the height direction relative to the positioning member 311, so as to adjust the distance between the fixing member 313 and the positioning member 311 along the height direction to match the size of the circuit board assembly 500 along the height direction.

[0111] It can be understood that by setting the positioning member 311, the adjusting structure 312 and the fixing member 313, the spacing between the positioning member 311 and the fixing member 313 can be adjusted, so as to be applicable to circuit board assemblies 500 of different sizes in the height direction.

[0112] In some embodiments, the adjusting structure 312 includes an adjusting nut 3121 and an adjusting rod 3122, the adjusting rod 3122 is fixedly connected with the fixing member 313, an outer wall of the adjusting rod 3122 is provided with a first outer thread, and an inner wall of the adjusting nut 3121 is provided with a first inner thread matched with the first outer thread. The positioning member 311 is provided with a first mounting hole penetrating in the height direction, the adjusting rod 3122 is inserted into the adjusting nut 3121 through the first mounting hole, and the first outer thread and the first inner thread are screwed. It can be understood that by pulling the adjusting rod 3122, the position of the fixing member 313 can be moved, and by adjusting the adjusting nut 3121, the position of the adjusting rod 3122 can be fixed, so as to fix the position of the fixing member 313.

[0113] Specifically, the adjusting structure 312 can be a standard part, such as a bolt.

[0114] In some embodiments, the locking assembly 320 includes two locking members 321, and the two locking members 321 are arranged at opposite ends of the second rack 200 in a second direction. The second direction is perpendicular to the first direction.

[0115] The locking member 321 includes a first connecting portion and a second connecting portion, the outer wall size of the first connecting portion is greater than the outer wall size of the second connecting portion, the outer wall of the second connecting portion is provided with a second outer thread, the second rack 200 is provided with a second mounting hole penetrating in the second direction and extending in the first direction. The positioning member 311 is provided with a third mounting hole, the inner wall of the third mounting hole is provided with a second inner thread matched with the second outer thread, the second connecting portion is inserted into the third mounting hole through the second mounting hole, and the second outer thread and the second inner thread are screwed to fix the positioning member 311. The outer wall size refers to the diameter size.

[0116] It can be understood that when the locking member 321 is tightly connected with the positioning member 311, the fixing of the positioning member 311 can be realized, and the reliability of the connection is high. When the locking member 321 is loosely connected with the positioning member 311, the locking member 321 and the positioning member 311 can slide relative to the second rack 200.

[0117] In some embodiments, the locking member 321 can be a standard part, such as a screw.

[0118] The working process of the circuit board assembly welding jig will be described below.

[0119] When the circuit board assembly 500 of different models needs to be fixed, first, the positioning member 311 is slid to match the distance between the two adjacent positioning members 311 with the size of the circuit board assembly 500, and then the locking member 321 is rotated to lock the positioning member 311 with the second rack 200. The fixing member 313 is moved by the adjusting structure 312 until the distance between the positioning member 311 and the fixing member 313 is greater than the thickness of the circuit board assembly 500, and then the two ends of the circuit board assembly 500 are arranged on the fixing member 313, respectively, and finally the fixing member 313 is moved by the adjusting structure 312 until the two end faces of the circuit board assembly 500 are abutted with the fixing member 313 and the positioning member 311, respectively.

[0120] The driving member 436 is started, the second lifting plate 435 is moved by the driving member 436, the second connecting rod 434 is rotated by the second lifting plate 435, the rotating plate 433 is rotated by the second connecting rod 434, the first connecting rod 432 is rotated by the rotating plate 433, and the first lifting plate 431 is moved by the first connecting rod 432, so that the first lifting plate 431 and the second lifting plate 435 are close to each other after the driving member 436 is started. The first support member 412 and the third support member 422 matching the support points of the circuit board assembly 500 are selected, the first support member 412 is pressed into the first connecting groove 4111 until the first locking ball 4142 in the first connecting groove 4111 abuts against the inner wall of the first recess 4121, and the first pressure sensor 415 is located in the preset pressure interval, and the third support member 422 is pressed into the second connecting groove 4211 until the second locking ball 4242 in the second connecting groove 4211 abuts against the inner wall of the second recess 4221, and the second pressure sensor 425 is located in the preset pressure interval. The second support member 413 of the required size is inserted on the first support member 412 and supports the circuit board assembly 500, and the fourth support member 423 of the required size is inserted on the third support member 422 and supports the circuit board assembly 500, so that the circuit board assembly 500 of different sizes can be matched, and different regions on the circuit board assembly 500 can be supported.

[0121] The circuit board assembly welding jig provided by the present application is described in detail above. In this paper, specific examples are applied to explain the principles and implementation modes of the present application. The above description of the embodiments is only used to help understand the method and its core idea. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made without departing from the principles of the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

[0122] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A circuit board assembly welding fixture, characterized in that, include: frame; A pre-fixing mechanism (300) is movably connected to the frame, the pre-fixing mechanism (300) being configured to move relative to the frame in a first direction to match the dimensions of the circuit board assembly in the first direction; the pre-fixing mechanism (300) is configured to clamp a variable size in the height direction to match the dimensions of the circuit board assembly in the height direction; wherein the first direction is parallel to the horizontal plane; A support mechanism (400) is movably connected to the frame and is configured to move along the height direction to match the dimensions of the circuit board assembly along the height direction.

2. The circuit board assembly welding fixture according to claim 1, characterized in that, The pre-fixing mechanism (300) includes two clamping assemblies (310), both of which are movably connected to the frame. The two clamping assemblies (310) are movable relative to each other along a first direction of the frame to match the size of the circuit board assembly along the first direction. The clamping assemblies (310) are used to clamp the edge of the circuit board assembly. The clamping assemblies (310) are configured to clamp a variable size along the height direction to match the size of the circuit board assembly along the height direction. The pre-fixing mechanism (300) includes two locking components (320), which are respectively arranged in correspondence with the two clamping components (310). The locking components (320) are connected to the frame and the clamping components (310) to fix the position of the clamping components (310) along the first direction. The support mechanism (400) includes a top support assembly (410) which is movably connected to the frame and is located above the pre-fixed mechanism (300). The support mechanism (400) includes a bottom support assembly (420) which is movably connected to the frame and is located below the pre-fixed mechanism (300). The top support assembly (410) and the bottom support assembly (420) are used to abut against the internal area of ​​the circuit board assembly. The support mechanism (400) includes a drive assembly (430) that drives the top support assembly (410) and the bottom support assembly (420) to move along the height direction, adjusting the distance between the top support assembly (410) and the bottom support assembly (420) to match the size of the circuit board assembly along the height direction.

3. The circuit board assembly welding fixture according to claim 2, characterized in that, The top support assembly (410) includes: The first connecting plate (411) is connected to the driving assembly (430), and the orthographic projection of the clamping assembly (310) toward the horizontal plane is located within the orthographic projection of the first connecting plate (411) toward the horizontal plane; A plurality of first support members (412) are arranged in an array on the bottom of the first connecting plate (411); At least one second support member (413) is provided, the number of which is not greater than the number of the first support members (412). The at least one second support member (413) may be selectively disposed at the bottom of different first support members (412). The second support member (413) is used to abut against the circuit board assembly.

4. The circuit board assembly welding fixture according to claim 3, characterized in that, The top support assembly (410) further includes a plurality of first connecting structures (414), wherein the first support member (412) is detachably connected to the first connecting plate (411) via the first connecting structures (414), and the first connecting structure (414) includes: The first elastic element (4141) has a plurality of arrayed first connecting grooves (4111) at the bottom of the first connecting plate (411). The first elastic element (4141) is located in the first connecting groove (4111) and is connected to the side wall of the first connecting groove (4111). The first locking ball (4142) is located in the first connecting groove (4111) and is connected to the first elastic member (4141). The side wall of the first support member (412) is provided with a first recess (4121) that matches the first locking ball (4142). The first support member (412) is inserted into the first connecting groove (4111) and the first locking ball (4142) is engaged with the first recess (4121).

5. The circuit board assembly welding fixture according to claim 4, characterized in that, The bottom support assembly (420) includes: The second connecting plate (421) is connected to the driving assembly (430), and the orthographic projection of the clamping assembly (310) toward the horizontal plane is located within the orthographic projection of the second connecting plate (421) toward the horizontal plane; A plurality of third support members (422) are arranged in an array on top of the second connecting plate (421); At least one fourth support member (423), the number of which is not greater than the number of the third support members (422), the at least one fourth support member (423) may be selectively disposed on top of different third support members (422), the fourth support member (423) being used to abut against the circuit board assembly.

6. The circuit board assembly welding fixture according to claim 5, characterized in that, The number of second support members (413) is at least two, and the outer wall dimensions of the end of the second support member (413) away from the first support member (412) are different; And / or, the number of second support members (413) is at least two, and the different second support members (413) have different dimensions along the height direction; And / or, the number of fourth support members (423) is at least two, and the outer wall dimensions of the ends of the different fourth support members (423) opposite to the third support member (422) are different; And / or, the number of fourth support members (423) is at least two, and the different fourth support members (423) have different dimensions along the height direction.

7. The circuit board assembly welding fixture according to claim 5, characterized in that, The bottom support assembly (420) further includes a plurality of second connecting structures (424), and the third support member (422) is detachably connected to the first connecting plate (411) through the second connecting structures (424). The second connecting structures (424) include: The second elastic element (4241) has a plurality of arrayed second connecting grooves (4211) on the top of the second connecting plate (421). The second elastic element (4241) is located in the second connecting groove (4211) and is connected to the side wall of the second connecting groove (4211). The second locking ball (4242) is located in the second connecting groove (4211) and is connected to the second elastic member (4241). The side wall of the third support member (422) is provided with a second recess (4221) that matches the second locking ball (4242). The third support member (422) is inserted into the second connecting groove (4211), and the second locking ball (4242) is engaged with the second recess (4221).

8. The circuit board assembly welding fixture according to claim 7, characterized in that... ； The top support assembly (410) further includes a first pressure sensor (415) located between the first locking ball (4142) and the first recess (4121), and the first pressure sensor (415) is configured to detect the pressure on the first locking ball (4142). And / or, the bottom support assembly (420) further includes a second pressure sensor (425) located between the second locking ball (4242) and the second recess (4221), the second pressure sensor (425) being configured to detect the pressure on the second locking ball (4242).

9. The circuit board assembly welding fixture according to claim 5, characterized in that, The driver component (430) includes: The first lifting plate (431) is slidably connected to the frame, and the first lifting plate (431) is connected to the first connecting plate (411); The first connecting rod (432) is rotatably connected to the first lifting plate (431); A rotating plate (433) is rotatably connected to the frame, and the first connecting rod (432) is rotatably connected to the rotating plate (433); The second connecting rod (434) is rotatably connected to the rotating plate (433); The second lifting plate (435) is slidably connected to the frame, the second lifting plate (435) is connected to the second connecting plate (421), and the second lifting plate (435) is rotatably connected to the second connecting rod (434); A driving component (436) has a driving shaft connected to the second lifting plate (435). The driving component (436) drives the second lifting plate (435) to move along the height direction. The second lifting plate (435) drives the second connecting rod (434), the rotating plate (433), and the first connecting rod (432) to rotate. The first connecting rod (432) drives the first lifting plate (431) to move along the height direction, so that the first lifting plate (431) and the second lifting plate (435) move closer to or further away from each other.

10. The circuit board assembly welding fixture according to claim 2, characterized in that, The clamping assembly (310) includes: Positioning element (311), which is slidably connected to the frame; An adjusting structure (312) includes an adjusting nut (3121) and an adjusting rod (3122). The outer wall of the adjusting rod (3122) is provided with a first external thread, and the inner wall of the adjusting nut (3121) is provided with a first internal thread that matches the first external thread. The positioning member (311) is provided with a first mounting hole that extends through the height direction. The adjusting rod (3122) is inserted into the adjusting nut (3121) through the first mounting hole, and the first external thread engages with the first internal thread. The fixing member (313) is fixedly connected to the adjusting rod (3122), and the adjusting rod (3122) moves relative to the positioning member (311) along the height direction to adjust the distance between the fixing member (313) and the positioning member (311) along the height direction to match the size of the circuit board assembly along the height direction.

Images