Adjustable support for processing circuit board

Abstract

The utility model discloses an adjustable support for circuit board processing, which comprises a rack fixed to the ground, a rotating mechanism fixed to the rack, a rotating shaft of the rotating mechanism, an axis of the rotating shaft being a rotating center line of the adjustable support, the rotating center line extending in a horizontal direction, a support frame fixedly connected with the rotating shaft of the rotating mechanism and capable of being driven by the rotating mechanism to adjust an angle, a first clamping plate installed on the support frame and capable of moving in a direction parallel to the rotating center line, a second clamping plate installed on the support frame and also capable of moving in the direction parallel to the rotating center line, and a second motor for driving the first clamping plate and the second clamping plate to move synchronously in the direction parallel to the rotating center line. In the utility model, the distance between the first clamping plate and the second clamping plate can be infinitely adjusted, and the adjustable support can be adapted to circuit boards of various specifications and sizes. When a surface mounting process is performed, the angle of the circuit board can be adjusted very conveniently by rotating the support frame through the rotating mechanism.

Description

Technical Field

[0001] This utility model relates to the field of circuit board processing technology, and in particular to an adjustable bracket for circuit board processing. Background Technology

[0002] As electronic devices evolve towards higher density, miniaturization, and higher power, circuit boards have become an indispensable core component in various electronic products. Circuit boards not only enable circuit integration and visualization, but also provide reliable support for mass production and overall layout optimization.

[0003] In surface mount technology (SMT) and other back-end processes of circuit boards, dedicated brackets are needed to position and fix the circuit boards to ensure mounting accuracy and process consistency. However, existing brackets generally have the following shortcomings:

[0004] (1) Poor compatibility: A set of brackets can often only be adapted to a single or fixed number of plate types, and the adjustment cycle is long when changing plate types;

[0005] (2) Inconvenient adjustment: The processing angle (tilt, rotation) requires multiple manual disassembly and assembly, making it difficult to achieve rapid online adjustment;

[0006] Therefore, developing a circuit board processing bracket that is compatible with multiple sizes, allows for quick clamping, and has an adjustable angle has become a key technological requirement for improving the automation level and overall efficiency of SMT production lines. Utility Model Content

[0007] The purpose of this invention is to provide an adjustable bracket for circuit board processing that is compatible with multiple sizes, allows for quick clamping, and has an adjustable angle.

[0008] The technical solution adopted by this utility model to solve its technical problem is: providing an adjustable bracket for circuit board processing, which includes:

[0009] The frame is fixed to the ground;

[0010] A rotating mechanism is fixed to the frame; the axis of the rotating shaft of the rotating mechanism is the rotation center line of the adjustable bracket, the rotation center line extends horizontally, and the rotation center line is higher than the ground by a predetermined distance;

[0011] The support frame is fixedly connected to the rotating shaft of the rotating mechanism and can be adjusted in angle by the rotating mechanism.

[0012] The first clamping plate is mounted on the support frame and can move in a direction parallel to the rotation center line;

[0013] The second clamping plate corresponds to the first clamping plate and is also mounted on the support frame, and can also move in a direction parallel to the rotation center line; wherein, the first clamping plate and the second clamping plate are respectively used to clamp the opposite sides of the circuit board;

[0014] The second motor is used to drive the first clamping plate and the second clamping plate to move synchronously towards or away from each other in a direction parallel to the rotation center line.

[0015] Furthermore, the adjustable bracket also includes a first linear guide rail and a second linear guide rail;

[0016] The support frame includes a main support frame and a secondary support frame; the main support frame is fixedly connected to the rotating shaft of the rotating mechanism; there are two secondary support frames, which are respectively fixed at both ends of the main support frame;

[0017] The first linear guide is mounted on one of the secondary support frames, and its extension direction is parallel to the rotation center line;

[0018] The second linear guide is mounted on another of the auxiliary support frames, and its extension direction is parallel to the rotation center line;

[0019] One end of the first clamping plate is slidably connected to the first linear guide rail via a first slider, and the other end is slidably connected to the second linear guide rail via a second slider;

[0020] One end of the second clamping plate is slidably connected to the first linear guide rail via a third slider, and the other end is slidably connected to the second linear guide rail via a fourth slider.

[0021] Furthermore, both the first linear guide and the second linear guide are equidistant from the rotation center line.

[0022] Furthermore, the adjustable bracket also includes a double-threaded lead screw, a first threaded block, and a second threaded block;

[0023] The threads on the left and right sides of the double-threaded screw rotate in opposite directions, and the double-threaded screw is rotatably mounted on one of the auxiliary support frames.

[0024] The first threaded block is sleeved on the left side of the double threaded screw and engages with the corresponding thread on the double threaded screw; and the first threaded block is simultaneously fixed relative to the first slider and the first clamping plate.

[0025] The second threaded block is sleeved on the right side of the double-threaded screw and engages with the corresponding thread on the double-threaded screw; and the second threaded block is simultaneously fixed relative to the third slider and the second clamping plate.

[0026] The second motor is connected to the double-threaded lead screw and is mounted on the corresponding auxiliary support frame.

[0027] Furthermore, the adjustable bracket also includes a guide rod, a first guide block, and a second guide block;

[0028] The guide rod is mounted on another of the secondary support frames;

[0029] The first guide block is slidably sleeved on the left side of the guide rod, and is simultaneously fixed relative to the second slider and the first clamping plate;

[0030] The second guide block is slidably sleeved on the right side of the guide rod, and is simultaneously fixed relative to the fourth slider and the second clamping plate.

[0031] Furthermore, the adjustable bracket also includes a first connecting rod and a second connecting rod;

[0032] The two ends of the first connecting rod are fixedly connected to the first threaded block and the first guide block, respectively; wherein, the first clamping plate is detachably installed in the middle of the first connecting rod;

[0033] The two ends of the second connecting rod are fixedly connected to the second threaded block and the second guide block, respectively; wherein the second clamping plate is detachably installed in the middle of the second connecting rod.

[0034] Furthermore, the first clamping plate is provided with a first slot, and the first slot has a first opening on the side of the first clamping plate; the first connecting rod is inserted into the first slot through the first opening, and the first clamping plate is clamped and fixed to the first connecting rod by screws provided at the first opening;

[0035] The second clamping plate is provided with a second slot, and the second slot has a second opening on the side of the second clamping plate; the second connecting rod is inserted into the second slot through the second opening, and the second clamping plate is clamped and fixed to the second connecting rod by screws provided at the second opening.

[0036] Furthermore, the first clamping plate is provided with a first clamping groove on the side near the second clamping plate; the second clamping plate is provided with a second clamping groove on the side near the first clamping plate; wherein the first clamping groove and the second clamping groove are respectively used to clamp the opposite sides of the circuit board.

[0037] Furthermore, the protruding width of the lower surface of the first clamping groove is greater than the protruding width of its upper surface to form a support surface for supporting the lower surface of the circuit board.

[0038] The protruding width of the lower surface of the second clamping groove is also greater than the protruding width of its upper surface, thus forming a support surface for supporting the lower surface of the circuit board.

[0039] Furthermore, the height of the rotation center line above the ground is defined as H, and the distances from the outer surfaces of the two auxiliary support frames on the side opposite to the rotation center line are equal and defined as L; wherein, L < H.

[0040] The beneficial effects of this utility model are as follows:

[0041] (1) The compatibility is improved. The distance between the first and second clamps can be infinitely adjusted, which can be adapted to circuit boards of various sizes.

[0042] (2) When loading and unloading circuit boards, the efficiency is high. The second motor controls the first clamping plate and the second clamping plate to move synchronously towards each other to clamp the circuit board, and to move synchronously away from each other to release the circuit board.

[0043] (3) When the circuit board is surface mount, the angle of the circuit board is very easy to adjust. The angle of the circuit board can be adjusted by rotating the support frame through the rotating mechanism. The angle adjustment is also suitable for the surface mount process. At the same time, it is also suitable for double-sided circuit boards. The rotating mechanism can drive the support frame to rotate 180° to flip the circuit board. After flipping, the back side of the circuit board can be surface mounted. Attached Figure Description

[0044] Figure 1 This is an overall structural diagram of the adjustable bracket for circuit board processing according to this utility model;

[0045] Figure 2 yes Figure 1 Another perspective view, in which the rack is hidden;

[0046] Figure 3 yes Figure 2 Top view;

[0047] Figure 4 This is a schematic diagram of the circuit board being held together by the first clamping plate and the second clamping plate in this utility model.

[0048] Figure 5 This is a cross-sectional structural diagram of the first and second clamping plates in this utility model;

[0049] Figure 6 This is a flowchart illustrating the actions of the first and second clamping plates in different positions during the process of clamping the circuit board in this utility model. Detailed Implementation

[0050] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0051] See Figures 1 to 3 This utility model provides an adjustable bracket for circuit board processing, which includes a frame 100, a rotating mechanism 200, a support frame 300, a first clamping plate 410, a second clamping plate 420, and a second motor 510.

[0052] The frame 100 is fixed to the ground by anchor bolts.

[0053] The rotating mechanism 200 is fixed to the frame 100. The rotating mechanism 200 can be a conventional rotating mechanism, in which a first motor 210 drives a turntable 220 to rotate via a gear set, and the turntable 220 then drives a rotating shaft 230 fixedly connected to it to rotate. The axis of the rotating shaft 230 of the rotating mechanism 200 is the rotation center line a of the adjustable support, which extends horizontally and is a predetermined distance above the ground.

[0054] The support frame 300 is fixedly connected to the rotating shaft 230 of the rotating mechanism 200, and can be driven by the rotating mechanism 200 to make angle adjustments.

[0055] The first clamping plate 410 is mounted on the support frame 300 and can move in a direction parallel to the rotation center line a.

[0056] The second clamping plate 420 corresponds to the first clamping plate 410 and is also mounted on the support frame 300, and can also move in a direction parallel to the rotation center line a. The first clamping plate 410 and the second clamping plate 420 are respectively used to clamp opposite sides of the circuit board b. In this invention, the distance between the first clamping plate 410 and the second clamping plate 420 can be infinitely adjusted between 50mm and 600mm, making it suitable for circuit boards of various widths within this range.

[0057] The second motor 510 is used to drive the first clamping plate 410 and the second clamping plate 420 to move synchronously towards or away from each other in a direction parallel to the rotation center line a, so as to adapt to circuit boards b of different widths.

[0058] In a preferred embodiment, see Figures 1 to 3 The adjustable bracket further includes a first linear guide rail 610 and a second linear guide rail 620. The support frame 300 is composed of a main support frame 310 and two auxiliary support frames 320 on the left and right, forming a "door" shaped frame. The main support frame 310 is fixedly connected to the rotating shaft 230 of the rotating mechanism 200, and the auxiliary support frames 320 can be fixedly connected to the main support frame 310 by screws (e.g., ...). Figures 1 to 3Alternatively, it can be fixedly connected to the main support frame 310 by welding. The first linear guide rail 610 and the second linear guide rail 620 are respectively installed on the left and right auxiliary support frames 320, and their extension directions are parallel to the rotation center line a. The first clamping plate 410 is slidably connected to the first linear guide rail 610 through the first slider 630, and slidably connected to the second linear guide rail 620 through the second slider 640. The second clamping plate 420 is slidably connected to the first linear guide rail 610 through the third slider 650, and slidably connected to the second linear guide rail 620 through the fourth slider 660.

[0059] In a preferred embodiment, the first linear guide rail 610 and the second linear guide rail 620 are equidistant from the rotation center line a, so that the two guide rails are symmetrically distributed on both sides of the rotation center line a. After clamping the circuit board b, the circuit board b can rotate around its center line as an axis.

[0060] Furthermore, in some specific implementations, see [link to relevant documentation]. Figures 1 to 3 The adjustable bracket of this utility model also includes a double threaded screw 710, a first threaded block 720 and a second threaded block 730.

[0061] The threads on the left and right sides of the double threaded screw 710 rotate in opposite directions, and the double threaded screw 710 is located directly above the first linear guide rail 610. Its two ends are rotatably mounted on both sides of the corresponding auxiliary support frame 320 through bearings.

[0062] The first threaded block 720 is sleeved on the left side of the double-threaded screw 710 and engages with the corresponding thread on the double-threaded screw 710. Furthermore, the first threaded block 720 is simultaneously fixed relative to the first slider 630 and the first clamping plate 410.

[0063] The second threaded block 730 is sleeved on the right side of the double-threaded screw 710 and engages with the corresponding thread on the double-threaded screw 710. Furthermore, the second threaded block 730 is simultaneously fixed relative to the third slider 650 and the second clamping plate 420.

[0064] The second motor 510 is connected to the double threaded screw 710 via a coupling 520, and the second motor 510 is mounted on the corresponding auxiliary support frame 320.

[0065] In the above structure, the forward and reverse threads of the double threaded screw 710 realize the synchronous motion of single input and dual output. That is, when the second motor 510 drives the double threaded screw 710 to rotate, the double threaded screw 710 will drive the first clamping plate 410 and the second clamping plate 420 to move synchronously in opposite directions or in opposite directions through the first threaded block 720 and the second threaded block 730 respectively.

[0066] Furthermore, seeFigures 1 to 3 The adjustable bracket of this utility model also includes a guide rod 740, a first guide block 750, and a second guide block 760.

[0067] The guide rod 740 is parallel to the double threaded screw 710, and is positioned directly above the second linear guide rail 620, with both ends fixed to the sides of the corresponding auxiliary support frame 320.

[0068] The first guide block 750 is slidably sleeved on the left side of the guide rod 740, and is simultaneously fixed relative to the second slider 640 and the first clamping plate 410;

[0069] The second guide block 760 is slidably sleeved on the right side of the guide rod 740, and is simultaneously fixed relative to the fourth slider 660 and the second clamping plate 420.

[0070] In the above structure, the guide rod 740 corresponds to the double threaded screw 710, and is distributed on both sides of the rotation center line a, one on the left and one on the right. The guide rod 740 and the double threaded screw 710 form a closed force flow of "one driving and one guiding", which can suppress the lateral sway of the first clamping plate 410 and the second clamping plate 420, and improve the rigidity of the system and the accuracy of movement.

[0071] In a preferred embodiment, see Figures 1 to 3 The adjustable bracket also includes a first connecting rod 770 and a second connecting rod 780.

[0072] The two ends of the first connecting rod 770 are fixedly connected to the first threaded block 720 and the first guide block 750, respectively. The first clamping plate 410 is detachably installed in the middle of the first connecting rod 770.

[0073] The two ends of the second connecting rod 780 are fixedly connected to the second threaded block 730 and the second guide block 760, respectively. The second clamping plate 420 is detachably installed in the middle of the second connecting rod 780.

[0074] The above structure enables the replacement of clamping plates. For circuit boards of different thicknesses, clamping plates of different specifications can be quickly replaced without the need to completely remove the guide rail.

[0075] For more details, see Figure 4 and Figure 5As shown, the first clamping plate 410 is provided with a first slot 411, and the first slot 411 forms a first opening 411a on the side of the first clamping plate 410. The first connecting rod 770 is inserted into the first slot 411 through the first opening 411a, and the first clamping plate 410 is clamped and fixed to the first connecting rod 770 by a screw 430 provided at the first opening 411a. That is, when the screw 430 at the first opening 411a is turned, the upper and lower halves of the first clamping plate 410 can be brought closer together to clamp the first connecting rod 770. If it is necessary to remove the first clamping plate 410, first unscrew the screw 430, and then push the first clamping plate 410 forcefully to disengage the first connecting rod 770 from the first opening 411a.

[0076] The second clamping plate 420 is provided with a second slot 421, and the second slot 421 forms a second opening 421a on the side of the second clamping plate 420. The second connecting rod 780 is inserted into the second slot 421 through the second opening 421a, and the second clamping plate 420 is clamped and fixed to the second connecting rod 780 by a screw 430 provided at the second opening 421a. That is, when the screw 430 at the second opening 421a is turned, the upper and lower halves of the second clamping plate 420 can be brought closer together to clamp the second connecting rod 780. If it is necessary to remove the second clamping plate 420, first unscrew the screw 430, and then push the second clamping plate 420 forcefully to disengage the second connecting rod 780 from the second opening 421a.

[0077] In some preferred embodiments, see Figure 4 and Figure 5 The first clamping plate 410 has a first clamping groove 412 on the side near the second clamping plate 420. The second clamping plate 420 has a second clamping groove 422 on the side near the first clamping plate 410. The first clamping groove 412 and the second clamping groove 422 are used to clamp the opposite sides of the circuit board b.

[0078] In addition, the protruding width of the lower surface of the first clamping groove 412 is greater than the protruding width of its upper surface, so as to form a larger support surface for supporting the lower surface of the circuit board b.

[0079] The protruding width of the lower surface of the second clamping groove 422 is also greater than the protruding width of its upper surface, thus forming a larger support surface for supporting the lower surface of the circuit board b.

[0080] The aforementioned clamping groove can form a U-shaped wrap around the edge of the circuit board, preventing the board from slipping or warping during the flipping process.

[0081] The thickness of the first clamping plate 410 or the second clamping plate 420, the first clamping groove 412 or the second clamping groove 422 is different, and the thickness can be between 0.8mm and 6mm to accommodate circuit boards of different thicknesses.

[0082] In some preferred embodiments, see Figure 1 The height of the rotation center line a above the ground is defined as H. The distance from the outer surface of the two support frames 320 on the side opposite to the rotation center line a to the rotation center line a is L, and L < H; preferably, 1.2L < H < 2.5L. Wherein, H is between 450mm and 1200mm, preferably around 750mm.

[0083] The aforementioned dimensions ensure that when the first clamping plate 410 and the second clamping plate 420 hold the circuit board b, the angle can be adjusted within the range of 0° to 180°, enabling pitch processing of the circuit board b without interference with the ground and guaranteeing a large adjustment range. For double-sided circuit boards, the circuit board can be flipped. After surface mounting is completed on the front side, it can be rotated 180 degrees to flip the circuit board over for surface mounting on the back side.

[0084] The general workflow of this utility model is as follows:

[0085] Step S1: After the system is powered on, the second motor 500 reverses to a preset angle, and the first clamping plate 410 and the second clamping plate 420 move in opposite directions to the maximum distance, waiting for the upper plate to be placed.

[0086] Step S2: The robotic arm sends in the circuit board b. The left and right sides of the circuit board b correspond to the first clamping plate 410 and the second clamping plate 420 on the left and right sides respectively. The center point of the circuit board b coincides with the rotation center line a vertically.

[0087] Step S3: The second motor 500 rotates forward, and the double-threaded screw 710 drives the first clamping plate 410 and the second clamping plate 420 to move synchronously towards each other. When the distance between the protrusion on the lower surface of the first clamping groove 412 and the protrusion on the lower surface of the second clamping groove 422 is slightly smaller than the left and right width of the circuit board b, the second motor 500 stops working; at this time, see Figure 6 In the first position, if circuit board b is placed down, its left side can be placed on the lower surface of the first clamping groove 412, and its right side can be placed on the lower surface of the second clamping groove 422.

[0088] Step S4: The robotic arm lowers circuit board b, placing it on the lower surface of the two clamping slots. (See below) Figure 6 Position two; then, the robotic arm moves away;

[0089] Step S5: The second motor 500 continues to rotate forward at a certain angle, causing the first clamping plate 410 and the second clamping plate 420 to move slightly towards each other a certain distance. The first clamping groove 412 and the second clamping groove 422 clamp the left and right sides of the circuit board b. (See [link]) Figure 6 Mid-position state three;

[0090] Step S6: Perform surface mount technology (SMT) on circuit board b. If it is necessary to change the angle of circuit board b during the operation, the support frame 300 can be rotated to the target angle by rotating mechanism 200. If it is a double-sided circuit board for surface mount technology, after completing the surface mount on the front side, the circuit board can be flipped over by rotating mechanism 200 and then the surface mount on the back side can be performed.

[0091] Step S7: After processing is completed, the rotating mechanism 200 is reset to 0°; then, the robot arm clamps the circuit board b; after that, the second motor 500 reverses, causing the first clamping plate 410 and the second clamping plate 420 to move in opposite directions, releasing the circuit board b; finally, the robot arm removes the circuit board b and transfers it to the next process.

[0092] This completes one surface mount process for a circuit board. Repeating these steps allows for the continuous surface mount process of several circuit boards. If the size of the circuit board changes, simply controlling the distance between the synchronously moving first clamping plate 410 and second clamping plate 420 can alter the clamping distance and adapt to the new circuit board size.

[0093] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An adjustable bracket for circuit board processing, characterized in that, include: The frame (100) is fixed to the ground; A rotating mechanism (200) is fixed on the frame (100); the axis of the rotating shaft (230) of the rotating mechanism (200) is the rotation center line (a) of the adjustable support, the rotation center line (a) extends in the horizontal direction, and the rotation center line (a) is higher than the ground by a predetermined distance; The support frame (300) is fixedly connected to the rotating shaft (230) of the rotating mechanism (200) and can be driven by the rotating mechanism (200) to make angle adjustments; The first clamping plate (410) is mounted on the support frame (300) and can move in a direction parallel to the rotation center line (a); The second clamping plate (420) corresponds to the first clamping plate (410) and is also mounted on the support frame (300), and can also move in a direction parallel to the rotation center line (a); wherein the first clamping plate (410) and the second clamping plate (420) are respectively used to clamp the opposite sides of the circuit board (b); The second motor (510) is used to drive the first clamping plate (410) and the second clamping plate (420) to move synchronously towards or away from each other in a direction parallel to the rotation center line (a).

2. The adjustable bracket for circuit board processing according to claim 1, characterized in that, The adjustable bracket also includes a first linear guide rail (610) and a second linear guide rail (620). The support frame (300) includes a main support frame (310) and a secondary support frame (320); the main support frame (310) is fixedly connected to the rotating shaft (230) of the rotating mechanism (200); there are two secondary support frames (320) and they are respectively fixed at both ends of the main support frame (310); The first linear guide (610) is mounted on one of the sub-support frames (320) and extends in a direction parallel to the rotation center line (a); The second linear guide (620) is mounted on another of the said auxiliary support frames (320), and its extension direction is parallel to the rotation center line (a); One end of the first clamping plate (410) is slidably connected to the first linear guide rail (610) via the first slider (630), and the other end is slidably connected to the second linear guide rail (620) via the second slider (640); One end of the second clamping plate (420) is slidably connected to the first linear guide rail (610) via the third slider (650), and the other end is slidably connected to the second linear guide rail (620) via the fourth slider (660).

3. The adjustable bracket for circuit board processing according to claim 2, characterized in that, The first linear guide (610) and the second linear guide (620) are both equidistant from the rotation center line (a).

4. The adjustable bracket for circuit board processing according to claim 3, characterized in that, The adjustable bracket also includes a double-threaded lead screw (710), a first threaded block (720), and a second threaded block (730). The threads on the left and right sides of the double threaded screw (710) rotate in opposite directions, and the double threaded screw (710) is rotatably mounted on one of the auxiliary support frames (320). The first threaded block (720) is sleeved on the left side of the double threaded screw (710) and meshes with the corresponding thread on the double threaded screw (710); and the first threaded block (720) is simultaneously fixed relative to the first slider (630) and the first clamping plate (410); The second threaded block (730) is sleeved on the right side of the double threaded screw (710) and engages with the corresponding thread on the double threaded screw (710); and the second threaded block (730) is simultaneously fixed relative to the third slider (650) and the second clamping plate (420); The second motor (510) is connected to the double threaded screw (710) and is mounted on the corresponding secondary support frame (320).

5. An adjustable bracket for circuit board processing according to claim 4, characterized in that, The adjustable bracket also includes a guide rod (740), a first guide block (750), and a second guide block (760); The guide rod (740) is mounted on another of the auxiliary support frames (320); The first guide block (750) is slidably sleeved on the left side of the guide rod (740) and is simultaneously fixed relative to the second slider (640) and the first clamping plate (410); The second guide block (760) is slidably sleeved on the right side of the guide rod (740) and is simultaneously fixed relative to the fourth slider (660) and the second clamping plate (420).

6. The adjustable bracket for circuit board processing according to claim 5, characterized in that, The adjustable bracket also includes a first connecting rod (770) and a second connecting rod (780). The two ends of the first connecting rod (770) are fixedly connected to the first threaded block (720) and the first guide block (750) respectively; wherein, the first clamping plate (410) is detachably installed in the middle of the first connecting rod (770); The two ends of the second connecting rod (780) are fixedly connected to the second threaded block (730) and the second guide block (760) respectively; wherein the second clamping plate (420) is detachably installed in the middle of the second connecting rod (780).

7. An adjustable bracket for circuit board processing according to claim 6, characterized in that, The first clamping plate (410) is provided with a first slot (411), and the first slot (411) forms a first opening (411a) on the side of the first clamping plate (410); the first connecting rod (770) is inserted into the first slot (411) through the first opening (411a), and the first clamping plate (410) is clamped and fixed to the first connecting rod (770) by a screw (430) provided at the first opening (411a); The second clamping plate (420) is provided with a second slot (421), and the second slot (421) forms a second opening (421a) on the side of the second clamping plate (420); the second connecting rod (780) is inserted into the second slot (421) through the second opening (421a), and the second clamping plate (420) is clamped and fixed to the second connecting rod (780) by a screw (430) provided at the second opening (421a).

8. An adjustable bracket for circuit board processing according to claim 7, characterized in that, The first clamping plate (410) is provided with a first clamping groove (412) on the side near the second clamping plate (420); the second clamping plate (420) is provided with a second clamping groove (422) on the side near the first clamping plate (410); wherein the first clamping groove (412) and the second clamping groove (422) are respectively used to clamp the opposite sides of the circuit board (b).

9. An adjustable bracket for circuit board processing according to claim 8, characterized in that, The protruding width of the lower surface of the first clamping groove (412) is greater than the protruding width of its upper surface to form a support surface for supporting the lower surface of the circuit board (b). The protruding width of the lower surface of the second clamping groove (422) is also greater than the protruding width of its upper surface, thus forming a support surface for supporting the lower surface of the circuit board (b).

10. An adjustable bracket for circuit board processing according to any one of claims 2 to 9, characterized in that, The height of the rotation center line (a) above the ground is defined as H, and the distances from the outer surfaces of the two auxiliary support frames (320) on the side opposite to the rotation center line (a) to the rotation center line (a) are equal and defined as L; wherein, L < H.

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