A fixing mechanism for gold plating of printed circuit boards

Abstract

The utility model relates to printed circuit board gold immersion device technical field, specifically disclose a kind of fixed mechanism for printed circuit board gold immersion, it include: hanger;Further include: clamping assembly, clamping assembly is arranged in the inboard of hanger, clamping assembly is used to fix printed circuit board;Several pull hangers are symmetrically fixedly connected to hanger, first clamping assembly is symmetrically arranged in the both sides of hanger, and first clamping assembly is used to the clamping fixed of two hangers, and first clamping assembly includes the connecting plate fixedly connected with hanger. Because of the sliding connection of card bolt one and connecting block two, the position of card bolt one in another connecting block one inner cavity can be fixed by sliding and pushing card bolt one into another connecting block one inner cavity, then moving bolt to connecting hole inner cavity by operating another bolt moving towards the direction of card bolt one, so that the position of two fixed mechanisms can be limited by the cooperation of first clamping assembly.

Description

Technical Field

[0001] This utility model relates to the technical field of immersion gold plating equipment for printed circuit boards, specifically a fixing mechanism for immersion gold plating of printed circuit boards. Background Technology

[0002] Immersion gold plating on printed circuit boards is a key and widely used surface treatment technology in the electronics manufacturing industry. This process uses chemical deposition to uniformly coat the surface of the printed circuit board with a layer of metallic gold, forming a dense, strongly bonded gold plating layer with excellent electrical properties. This gold plating not only significantly improves the conductivity of the circuit board and reduces signal transmission losses, but also greatly enhances the corrosion resistance and oxidation resistance of the circuit board, thereby effectively extending the service life of the circuit board.

[0003] In the immersion gold plating process of printed circuit boards (PCBs), the fixing mechanism plays a crucial role. It is responsible for firmly fixing the PCBs in the plating tank, ensuring that the PCBs do not shift or tilt during the plating process, thereby guaranteeing the stability and consistency of the plating quality. However, the number of fixing mechanisms in existing equipment is usually preset and cannot be flexibly adjusted. This fixed number design limits the adaptability and flexibility of the equipment. In actual production, the number of PCBs in different batches or orders may vary. When processing a large number of PCBs, due to the limited number of fixing mechanisms, it may not be possible to process all PCBs at once, requiring batch plating. This not only increases production time and cost but may also lead to inconsistent plating quality. Conversely, when processing a small number of PCBs, too many fixing mechanisms will result in resource waste, increase equipment idle costs and floor space. Therefore, we propose a fixing mechanism for immersion gold plating of printed circuit boards. Utility Model Content

[0004] The purpose of this utility model is to provide a fixing mechanism for immersion gold plating of printed circuit boards, so as to solve the problem that the number of fixing mechanisms in the existing devices mentioned in the background art is usually preset and cannot be flexibly adjusted.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a fixing mechanism for immersion gold plating of printed circuit boards, comprising: a bracket;

[0006] It also includes: a clamping assembly, which is located inside the bracket and is used to fix the printed circuit board;

[0007] The hanger is symmetrically fixedly connected with several hanging blocks. A first snap-fit ​​assembly is symmetrically arranged on both sides of the hanger. The first snap-fit ​​assembly is used to snap-fit ​​and fix the two hangers. The first snap-fit ​​assembly includes a connecting plate fixedly connected to the hanger. A connecting block one is fixedly connected to the lower end of the connecting plate. A bolt is threadedly connected to one side of the connecting block one. A connecting block two is fixedly connected to the upper end of the connecting plate. A latch one is slidably connected to the inner cavity of the connecting block two. A connecting hole is opened on one side of the latch one. A mating block is fixedly connected to the side of the two first snap-fit ​​assemblies that are far apart from each other. A second snap-fit ​​assembly is arranged on the side of the clamping assembly that is close to the mating block. The second snap-fit ​​assembly is used to snap-fit ​​and fix with the mating block.

[0008] The connecting plate has a threaded rod rotatably connected to its upper end, which is threadedly connected to a bolt. A gear is fixedly connected to the lower part of the threaded rod, and a gear is meshed with one side of the gear. A housing is fixedly connected to the side of the gear away from the threaded rod.

[0009] Among them, the inner cavity of the outer shell 2 is slidably connected to the slide plate 2, the side of the slide plate 2 away from the gear 2 is fixedly connected to the operating lever 2, the operating lever 2 is slidably connected to the outer shell 2, and the side of the operating lever 2 away from the slide plate 2 is fixedly connected to the handle 1, and the outer surface of the handle 1 is provided with several anti-slip grooves in a circular array.

[0010] The connecting plate is fixedly connected to the lower end of the connecting plate, the sealing block is slidably connected to the inner cavity of the connecting block, the spring is provided in the inner cavity of the connecting block, the two sides of the spring are fixedly connected to the opposite surfaces of the mounting plate and the sealing block respectively, the outer shell is fixedly connected to the side of the bolt away from the spring, the sliding plate is slidably connected to the inner cavity of the outer shell, the operating rod is fixedly connected to the side of the sliding plate away from the spring, and the operating rod is slidably connected to the outer shell.

[0011] The second snap-fit ​​assembly includes a connecting block five, a housing three is fixedly connected to the inner cavity of the connecting block five, a snap-fit ​​two is slidably connected to the inner cavity of the housing three, the snap-fit ​​two is snapped into the inner cavity of the docking block, a spring two is wound around the outer surface of the snap-fit ​​two, the spring two is located in the inner cavity of the housing three, and the two ends of the spring two are fixedly connected to the snap-fit ​​two and the opposite surfaces of the inner wall of the housing three, respectively, and an airbag one is provided in the inner cavity of the housing three.

[0012] Among them, the inner cavity of the connecting block five is fixedly connected to the outer shell four on the side near the outer shell three. The inner cavity of the outer shell four is provided with the airbag two. The side of the airbag two near the airbag one is fixedly connected to the air supply pipe, and the output end of the air supply pipe passes through the inner cavity of the outer shell four and the outer surface of the outer shell three in sequence, extending to the inner cavity of the airbag one. The inner cavity of the outer shell four is threadedly connected to the threaded block. The side of the threaded block near the airbag two is rotatably connected to the pressure plate. The side of the threaded block away from the pressure plate is fixedly connected to the operating rod three. The operating rod three is movably connected to the outer shell four.

[0013] The clamping assembly includes two connecting blocks four, and two connecting blocks five on the same side are fixedly connected to the connecting blocks four. A connecting block three is fixedly connected to the middle of each connecting block four. A connecting shaft is rotatably connected to the inner cavity of one of the connecting blocks three. A gear three is fixedly connected to the middle of the connecting shaft. A gear four is meshed with one side of the gear three. A handle two is fixedly connected to the upper end of the gear four. The handle two is rotatably connected to the connecting block three. A lead screw is symmetrically fixedly connected to the connecting shaft. A clamping plate is symmetrically slidably connected to the inner cavity of the two connecting blocks four. The lead screw is threadedly connected to the adjacent clamping plate.

[0014] This utility model has at least the following beneficial effects:

[0015] The first snap-fit ​​assembly enables two fixing mechanisms to be snapped together. When the two fixing mechanisms are snapped together, the first snap-fit ​​bolt is slidably connected to the second connecting block, allowing the first snap-fit ​​bolt to be pushed into the inner cavity of the other connecting block. Then, by operating another bolt, it is moved towards the first snap-fit ​​bolt and into the inner cavity of the connecting hole, thus fixing the position of the first snap-fit ​​bolt in the inner cavity of the other connecting block. Through the cooperation of the first snap-fit ​​assembly, the position of the two fixing mechanisms can be defined, allowing the two fixing mechanisms to be connected together. This allows the number of fixing mechanisms to be flexibly adjusted according to the number of circuit boards, improving the flexibility of the device during use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present utility model. Figure 1 ;

[0017] Figure 2 This is a schematic diagram of the overall structure of the present utility model. Figure 2 ;

[0018] Figure 3 This is a schematic diagram of the first snap-fit ​​component of this utility model;

[0019] Figure 4 This is an enlarged schematic diagram of point A of the first snap-fit ​​component of this utility model;

[0020] Figure 5 This is a schematic diagram of the locking bolt of this utility model;

[0021] Figure 6 This is a schematic diagram of the second operating lever of this utility model;

[0022] Figure 7 This is an enlarged schematic diagram of the operating lever at point B of this utility model;

[0023] Figure 8 This is a schematic diagram of the operating lever of this utility model;

[0024] Figure 9This is an enlarged schematic diagram of the operating lever at point C of this utility model;

[0025] Figure 10 This is a schematic diagram of the second snap-fit ​​component of this utility model;

[0026] Figure 11 This is a schematic diagram of the second type of bolt of this utility model;

[0027] Figure 12 This is a schematic diagram of the pressure plate of this utility model;

[0028] Figure 13 This is a schematic diagram of the clamping assembly of this utility model. Figure 1 ;

[0029] Figure 14 This is a schematic diagram of the clamping assembly of this utility model. Figure 2 .

[0030] In the diagram: 1. Hanger; 2. First snap-fit ​​assembly; 21. Connecting plate; 22. Connecting block one; 221. Mounting plate; 222. Spring one; 223. Sealing block; 224. Bolt; 225. Outer shell one; 226. Slide plate one; 227. Operating lever one; 23. Connecting block two; 231. Buckle one; 232. Connecting hole; 233. Threaded rod; 234. Gear one; 235. Gear two; 236. Outer shell two; 237. Slide plate two; 238. Operating lever two; 239. Handle one; 3. 4. Clamping assembly; 41. Connecting block three; 411. Connecting shaft; 412. Gear three; 413. Gear four; 414. Handle two; 415. Lead screw; 42. Connecting block four; 43. Clamping plate; 5. Second snap-fit ​​assembly; 51. Connecting block five; 52. Outer shell three; 521. Clamp two; 522. Spring two; 523. Airbag one; 53. Outer shell four; 531. Pressure plate; 532. Airbag two; 533. Air supply pipe; 534. Threaded block; 535. Operating lever three; 6. Traction block. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Example 1

[0033] Please see Figures 1 to 14 This utility model provides a technical solution: a fixing mechanism for immersion gold plating of printed circuit boards, comprising: a bracket 1;

[0034] It also includes: a clamping assembly 4, which is disposed on the inner side of the bracket 1 and is used to fix the printed circuit board;

[0035] The hanger 1 is symmetrically fixedly connected with several hanging blocks 6. The hanger 1 is symmetrically provided with first snap-fit ​​components 2 on both sides. The first snap-fit ​​components 2 are used to snap-fit ​​and fix the two hangers 1. The first snap-fit ​​components 2 include a connecting plate 21 fixedly connected to the hanger 1. The lower end of the connecting plate 21 is fixedly connected to a first connecting block 22. A bolt 224 is threadedly connected to one side of the first connecting block 22. The upper end of the connecting plate 21 is fixedly connected to a second connecting block 23. A first locking bolt 231 is slidably connected to the inner cavity of the second connecting block 23. A connecting hole 232 is opened on one side of the first locking bolt 231. The two first snap-fit ​​components 2 are fixedly connected to a mating block 3 on the side away from each other. The clamping components 4 are provided with a second snap-fit ​​component 5 on the side close to the mating block 3. The second snap-fit ​​component 5 is used to snap-fit ​​and fix the mating block 3.

[0036] The traction block 6 connects the entire mechanism to other components in the circuit board immersion gold process. The clamping component 4 fixes the position of circuit boards of different sizes, facilitating immersion gold treatment. The first snap-fit ​​component 2 snaps the two fixing mechanisms together. When snapping the two fixing mechanisms together, the first snap-fit ​​231 slides into the inner cavity of the other connecting block 22 because it is slidably connected to the second connecting block 23. Then, by operating the other bolt 224, it moves towards the first snap-fit ​​231 and into the inner cavity of the connecting hole 232, thus fixing the position of the first snap-fit ​​231 in the inner cavity of the other connecting block 22. With the cooperation of the first snap-fit ​​component 2, the position of the two fixing mechanisms is defined, allowing them to be connected together. This allows for flexible adjustment of the number of fixing mechanisms according to the number of circuit boards, improving the flexibility of the device during use.

[0037] A threaded rod 233 is rotatably connected to the upper end of the connecting plate 21. The threaded rod 233 is threadedly connected to the first bolt 231. A gear 234 is fixedly connected to the lower part of the threaded rod 233. A gear 235 is meshed with one side of the gear 234. A housing 236 is fixedly connected to the side of the gear 235 away from the threaded rod 233. A sliding plate 237 is slidably connected to the inner cavity of the housing 236. An operating lever 238 is fixedly connected to the side of the sliding plate 237 away from the gear 235. The operating lever 238 is slidably connected to the housing 236. A handle 239 is fixedly connected to the side of the operating lever 238 away from the sliding plate 237. Several anti-slip grooves are arranged in a ring array on the outer surface of the handle 239.

[0038] A mounting plate 221 is fixedly connected to the lower end of the connecting plate 21. A sealing block 223 is slidably connected to the inner cavity of the connecting block 22. A spring 222 is provided in the inner cavity of the connecting block 22. The two sides of the spring 222 are fixedly connected to the opposite surfaces of the mounting plate 221 and the sealing block 223, respectively. A housing 225 is fixedly connected to the side of the bolt 224 away from the spring 222. A sliding plate 226 is slidably connected to the inner cavity of the housing 225. An operating rod 227 is fixedly connected to the side of the sliding plate 226 away from the spring 222. The operating rod 227 is slidably connected to the housing 225.

[0039] When the number of fixing mechanisms needs to be adjusted based on the number of circuit boards, and when increasing the number of fixing mechanisms is required, firstly, two fixing mechanisms need to be aligned and stacked together. Then, the operator applies force to the handle 239, causing the operating lever 238 to slide away from the gear 235 within the inner cavity of the outer casing 236. Then, by rotating the handle 239, the outer casing 236 rotates. Since the outer casing 236 is fixedly connected to the gear 235, the rotation of the outer casing 236 will cause the gear 235 to rotate. The gear 235 then engages with the adjacent gear 234, causing the gear 234 to rotate. Since the threaded rod 233 is fixedly connected to the gear 234, the rotation of the gear 234 will cause the threaded rod 233 to rotate. Since the threaded rod 233 is threadedly connected to the latch 231, the rotation of the threaded rod 233 will cause the latch 234 to rotate. 31 moves towards the inner cavity of another connecting block 22. When the latch 231 moves towards the inner cavity of another connecting block 22, it will apply a force to the sealing block 223, causing the sealing block 223 to move towards the mounting plate 221. Then, it will cause the spring 222 to contract. After the latch 231 enters the inner cavity of the connecting block 22, the operator will apply a force to the operating rod 227, causing the slide plate 226 to slide in the inner cavity of the outer shell 225. Then, the operator will rotate the operating rod 227, which will cause the outer shell 225 to rotate, and then drive the bolt 224 to rotate. Since the bolt 224 is threadedly connected to the connecting block 22, the bolt 224 can move towards the inner cavity of the connecting hole 232, and then drive the bolt 224 into the inner cavity of the connecting hole 232. This will limit the position of the latch 231 in the inner cavity of the connecting block 22, and then complete the fixed connection of the two fixing mechanisms.

[0040] Example 2

[0041] The second snap-fit ​​assembly 5 includes a connecting block 51. A housing 3 52 is fixedly connected to the inner cavity of the connecting block 51. A latch 2 521 is slidably connected to the inner cavity of the housing 3 52, and the latch 2 521 snaps into the inner cavity of the mating block 3. A spring 2 522 is wound around the outer surface of the latch 2 521. The spring 2 522 is located within the inner cavity of the housing 3 52, and its two ends are fixedly connected to the opposing surfaces of the latch 2 521 and the inner wall of the housing 3 52, respectively. An airbag 1 523 is provided within the inner cavity of the housing 3 52. The inner cavity of the connecting block 51 is fixedly connected to the side of the housing 3 52 that is closest to the inner cavity of the housing 3 52. The inner cavity of the outer shell 453 is provided with an airbag 2532. An air supply pipe 533 is fixedly connected to the side of the airbag 2532 near the airbag 1523. The output end of the air supply pipe 533 extends through the inner cavity of the outer shell 453 and the outer surface of the outer shell 352 to the inner cavity of the airbag 1523. A threaded block 534 is threadedly connected to the inner cavity of the outer shell 453. A pressure plate 531 is rotatably connected to the side of the threaded block 534 near the airbag 2532. An operating rod 3535 is fixedly connected to the side of the threaded block 534 away from the pressure plate 531. The operating rod 3535 is movably connected to the outer shell 453.

[0042] When the clamping component 4 is damaged or needs to be adjusted according to the size of the circuit board, firstly, slide the entire clamping component 4 and several second snap-fit ​​components 5 together inside the bracket 1. Then, after determining the position of the clamping component 4, the second snap-fit ​​components 5 need to be fixedly connected to the mating block 3. The operator rotates the operating lever 3 535, and then the threaded block 534 rotates in the inner cavity of the outer shell 4 53. Since the threaded block 534 is threadedly connected to the inner cavity of the outer shell 4 53, when the threaded block 534 rotates, it will drive the threaded block 534 to move towards the airbag 2 532, and then drive the pressure plate 531. The pressure plate 531 moves towards the direction of airbag 2 532, and then applies force to airbag 2 532, squeezing airbag 2 532. This compresses the air in the inner cavity of airbag 2 532 and delivers it to the inner cavity of airbag 1 523 through the air supply pipe 533. Then, airbag 1 523 expands. Under the limiting action of outer shell 3 52, airbag 1 523 expands towards the direction of latch 2 521. Then, it pushes latch 2 521 towards the inner cavity of docking block 3 and pushes latch 2 521 into the inner cavity of docking block 3, thereby fixing the second latching component 5 and docking block 3 together.

[0043] Example 3

[0044] The clamping assembly 4 includes two connecting blocks 42, and two connecting blocks 51 on the same side are fixedly connected to the connecting blocks 42. A connecting block 3 41 is fixedly connected to the middle of each connecting block 42. A connecting shaft 411 is rotatably connected to the inner cavity of one of the connecting blocks 3 41. A gear 3 412 is fixedly connected to the middle of the connecting shaft 411. A gear 413 is meshed on one side of the gear 3 412. A handle 2 414 is fixedly connected to the upper end of the gear 413. The handle 2 414 is rotatably connected to the connecting block 3 41. A lead screw 415 is symmetrically fixedly connected to the connecting shaft 411. A clamping plate 43 is symmetrically slidably connected to the inner cavities of the two connecting blocks 42. The lead screw 415 is threadedly connected to the adjacent clamping plate 43.

[0045] When it is necessary to fix the circuit board, firstly, place the circuit board inside the connecting block 3 41. Then, the operator rotates the handle 2 414, which drives the gear 413 to rotate. The gear 413 then meshes with the adjacent gear 3 412, causing the gear 3 412 to rotate. The gear 3 412 then drives the connecting shaft 411 to rotate. Since the connecting shaft 411 is fixedly connected to the lead screw 415, the rotation of the connecting shaft 411 will drive the two lead screws 415 to rotate. Since the lead screw 415 is threadedly connected to the clamping plate 43, the rotation of the lead screw 415 will cause the clamping plate 43 to slide in the inner cavity of the connecting block 42. With the cooperation of the connecting block 3 41 and the clamping plate 43, circuit boards of different sizes can be fixed.

[0046] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0047] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixing mechanism for gold plating of a printed circuit board, comprising: Hanging rack (1); The feature is that it further includes a clamping component (4), which is disposed on the inner side of the hanger (1) and is used to fix the printed circuit board; The hanging frame (1) is symmetrically fixedly connected with several hanging blocks (6). The hanging frame (1) is symmetrically provided with first snap-fit ​​components (2) on both sides. The first snap-fit ​​components (2) are used to snap-fit ​​and fix the two hanging frames (1). The first snap-fit ​​components (2) include a connecting plate (21) fixedly connected to the hanging frame (1). The lower end of the connecting plate (21) is fixedly connected with a connecting block one (22). The connecting block one (22) is threadedly connected with a bolt (224) on one side. The upper end of the connecting plate (21) is fixedly connected with a connecting block two (23). The inner cavity of the connecting block two (23) is slidably connected with a latch one (231). The latch one (231) has a connecting hole (232) on one side. The two first snap-fit ​​components (2) are fixedly connected with a docking block (3) on the side away from each other. The clamping component (4) is provided with a second snap-fit ​​component (5) on the side close to the docking block (3). The second snap-fit ​​component (5) is used to snap-fit ​​and fix with the docking block (3).

2. The fixing mechanism for gold plating of printed circuit boards according to claim 1, characterized in that: The upper end of the connecting plate (21) is rotatably connected to a threaded rod (233), the threaded rod (233) is threadedly connected to a first buckle (231), the lower part of the threaded rod (233) is fixedly connected to a first gear (234), a second gear (235) is meshed on one side of the first gear (234), and a second outer shell (236) is fixedly connected on the side of the second gear (235) away from the threaded rod (233).

3. The fixing mechanism for gold plating of printed circuit boards according to claim 2, characterized in that: The inner cavity of the outer shell 2 (236) is slidably connected to the slide plate 2 (237). The side of the slide plate 2 (237) away from the gear 2 (235) is fixedly connected to the operating lever 2 (238). The operating lever 2 (238) is slidably connected to the outer shell 2 (236). The side of the operating lever 2 (238) away from the slide plate 2 (237) is fixedly connected to the handle 1 (239). The outer surface of the handle 1 (239) is provided with a number of anti-slip grooves in a ring array.

4. The fixing mechanism for gold plating of printed circuit boards according to claim 2, characterized in that: The lower end of the connecting plate (21) is fixedly connected to the mounting plate (221). The inner cavity of the connecting block (22) is slidably connected to the sealing block (223). The inner cavity of the connecting block (22) is provided with a spring (222). The two sides of the spring (222) are fixedly connected to the opposite surfaces of the mounting plate (221) and the sealing block (223), respectively. The bolt (224) is fixedly connected to the outer shell (225) on the side away from the spring (222). The inner cavity of the outer shell (225) is slidably connected to the sliding plate (226). The side of the sliding plate (226) away from the spring (222) is fixedly connected to the operating rod (227). The operating rod (227) is slidably connected to the outer shell (225).

5. The fixing mechanism for gold plating of printed circuit boards according to claim 1, characterized in that: The second snap-fit ​​assembly (5) includes a connecting block five (51), the inner cavity of the connecting block five (51) is fixedly connected to the outer shell three (52), the inner cavity of the outer shell three (52) is slidably connected to the snap-fit ​​two (521), the snap-fit ​​two (521) is snapped into the inner cavity of the docking block (3), the outer surface of the snap-fit ​​two (521) is wound with the spring two (522), the spring two (522) is located in the inner cavity of the outer shell three (52), and the two ends of the spring two (522) are fixedly connected to the opposite surfaces of the snap-fit ​​two (521) and the inner wall of the outer shell three (52), respectively. The inner cavity of the outer shell three (52) is provided with an airbag one (523).

6. The fixing mechanism for gold plating of printed circuit boards according to claim 5, characterized in that: The inner cavity of the connecting block five (51) is fixedly connected to the outer shell three (52) on the side of the outer shell four (53). The inner cavity of the outer shell four (53) is provided with an airbag two (532). The airbag two (532) is fixedly connected to the air supply pipe (533) on the side of the airbag two (532) near the airbag one (523). The output end of the air supply pipe (533) passes through the inner cavity of the outer shell four (53) and the outer surface of the outer shell three (52) in sequence and extends to the inner cavity of the airbag one (523). The inner cavity of the outer shell four (53) is threadedly connected to a threaded block (534). The threaded block (534) is rotatably connected to a pressure plate (531) on the side of the threaded block (534) near the airbag two (532). The side of the threaded block (534) away from the pressure plate (531) is fixedly connected to an operating rod three (535). The operating rod three (535) is movably connected to the outer shell four (53).

7. The fixing mechanism for gold plating of printed circuit boards according to claim 6, characterized in that: The clamping assembly (4) includes two connecting blocks four (42), and two connecting blocks five (51) on the same side are fixedly connected to the connecting blocks four (42). A connecting block three (41) is fixedly connected to the middle of each connecting block four (42). A connecting shaft (411) is rotatably connected to the inner cavity of one of the connecting blocks three (41). A gear three (412) is fixedly connected to the middle of the connecting shaft (411). A gear four (413) is meshed on one side of the gear three (412). A handle two (414) is fixedly connected to the upper end of the gear four (413). The handle two (414) is rotatably connected to the connecting block three (41). A lead screw (415) is symmetrically fixedly connected to the connecting shaft (411). A clamping plate (43) is symmetrically slidably connected to the inner cavity of the two connecting blocks four (42). The lead screw (415) is threadedly connected to the adjacent clamping plate (43).

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