A printed circuit board etching device

Abstract

The utility model relates to circuit board processing technical field especially relates to a kind of printed circuit board etching device, including box, the middle position fixed mounting of box interior has baffle, baffle is divided into the washing pool of left side and the soaking pool of right side, the top of baffle is equipped with two notches, and the end of baffle is equipped with the through-hole passing through two notches, rotating rod is rotatably inserted in the through-hole, the both ends of rotating rod are fixedly connected with turnover rod, the end of the both ends of two turnover rods away from rotating rod is fixedly connected with link rod, hanger plate is rotatably connected on link rod, the both ends of hanger plate bottom are fixedly installed with clamping assembly, and the both ends of two clamping assemblies are clamped with plate body, washing assembly is arranged in washing pool, the utility model can quickly complete the clamping of etching plate body and the position transfer of soaking and washing, and by the cooperation of washing assembly and lifting assembly, the residual etching liquid and water stain on the surface of plate body can be effectively removed.

Description

Technical Field

[0001] This utility model relates to the field of circuit board processing technology, and in particular to a printed circuit board etching device. Background Technology

[0002] Etching is a key process in the manufacturing of printed circuit boards. It removes excess copper foil from the surface of the circuit board through chemical or physical methods to form a pre-set circuit pattern. Currently, the etching processes commonly used in the industry mostly require two core steps: immersion etching and subsequent rinsing. However, existing etching equipment still has certain shortcomings in practical applications.

[0003] In traditional devices, after the circuit board is immersed and etched, it often needs to be transferred from the immersion tank to the rinsing tank manually or by a complex mechanical structure. This not only increases the number of operation steps, but also easily leads to excessive residual time of the etching solution due to the delay in the transfer process, which affects the processing accuracy of the circuit board. In addition, the common rinsing mechanism for the etching solution on the surface of the circuit board is mostly a fixed structure and relies solely on water flow to rinse, which makes it difficult to completely remove residual etching solution in some small gaps or corners. Therefore, this application proposes a printed circuit board etching device. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a printed circuit board etching device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a printed circuit board etching apparatus, comprising:

[0006] The box has a partition fixedly installed in the middle of the interior. The partition divides the box into a rinsing pool on the left and a soaking pool on the right. There are two notches at the top of the partition and through holes at the ends of the partition.

[0007] The rotating rod is rotatably inserted into the through hole. Two flip rods are fixedly connected to the two notches of the rotating rod. Connecting rods are fixedly connected to the ends of the two flip rods away from the rotating rod.

[0008] The hanging plate is rotatably connected to the connecting rod;

[0009] The clamping assembly has two sets, which are respectively installed at both ends of the bottom of the mounting plate, and the plate body is clamped between the two clamping assemblies;

[0010] The rinsing assembly is installed inside the rinsing tank;

[0011] The lifting assembly is installed inside the flushing tank and connected to the flushing assembly.

[0012] Optionally, both ends of the through hole are provided with shaft grooves, and both ends of the rotating rod are fixedly fitted with bearings located in the shaft grooves. A drive assembly connected to one end of the rotating rod is fixedly installed on the outside of the housing. Limiting blocks are fixedly installed on both sides of the partition and below the two notches. The top of the limiting blocks and the corners away from the partition are set as bevels. Both ends of the connecting rod are provided with annular grooves. The hanging plate is set as a U-shape, and the tops of both ends of the hanging plate are respectively rotatably fitted into the two annular grooves.

[0013] Optionally, the drive assembly includes a first gear, a first motor, and a second gear. The first gear is fixedly mounted on one end of the rotating rod, the first motor is fixedly mounted on the outside of the housing, and the second gear is fixedly mounted on the output end of the first motor, with the top end of the second gear meshing with the bottom end of the first gear.

[0014] Optionally, the clamping assembly includes a hanging rod, a clamping plate, a hydraulic rod, and a pressing plate. The hanging rod is fixedly installed at the bottom of the hanging plate, and a clamping groove is opened at the bottom end of the hanging rod. The clamping plate is set in the clamping groove, and a fixing rod that is fixedly connected to the hanging rod is inserted through the top end of the clamping plate. The hydraulic rod is fixedly installed on the side of the hanging plate, and the pressing plate is fixedly installed at the telescopic end of the hydraulic rod. The pressing plate is in contact with the outer side of the hanging rod. When the clamping plate is in a vertical state, the outer side of the clamping plate is flush with the side of the hanging rod. A pressing pad is fixedly installed on the inner side of both the clamping plate and the clamping groove. The bottom end of the pressing plate is set in an arc shape, and a groove is opened on the side of the pressing plate. A limiting plate that is fixedly connected to the hanging rod is inserted through the groove.

[0015] Optionally, the flushing assembly includes a frame, a water guide pipe, and an air guide pipe. The water guide pipe is U-shaped and horizontally fitted around the upper half of the outer side of the frame. Multiple neatly arranged spray nozzles that penetrate the frame are fixedly installed on the vertical part of the water guide pipe. A water inlet is fixedly installed at the top of the horizontal end of the water guide pipe, and a first corrugated pipe is fixedly connected to the water inlet. A water inlet pipe mounted on the top of the first corrugated pipe is fixedly connected to the top of the first corrugated pipe. The air guide pipe is U-shaped and horizontally fitted around the lower half of the outer side of the frame. Multiple neatly arranged air jets that penetrate the frame are fixedly installed on the vertical part of the air guide pipe. An air inlet is fixedly installed at the top of the horizontal end of the air guide pipe, and a second corrugated pipe is fixedly connected to the air inlet. An air inlet pipe mounted on the top of the second corrugated pipe is fixedly connected to the top of the second corrugated pipe.

[0016] Optionally, the ends of the water spray head and air jet head that penetrate the frame are both set to be inclined downward at 45°. A connecting plate is fixedly installed at the end of the frame away from the first corrugated pipe. A screw hole is opened in the middle of the connecting plate, and positioning holes are opened on both sides of the screw hole on the connecting plate.

[0017] Optionally, the lifting assembly includes a fixed plate, a second motor, a screw, and positioning rods. The fixed plate is fixedly installed on the inner wall of the left side of the washing pool of the housing, and the fixed plate is located directly above the connecting plate. The second motor is fixedly installed on the top of the fixed plate. The top end of the screw is fixedly connected to the output end of the second motor, and the bottom end of the screw is threaded through and inserted into the screw hole on the connecting plate. There are two positioning rods, which are respectively inserted through and inserted into two positioning holes on the connecting plate, and the two ends of the positioning rods are fixedly connected to the bottom of the fixed plate and the bottom of the washing pool, respectively.

[0018] Optionally, a drain pipe connected to the bottom of the rinsing tank is fixedly installed on the left side of the tank, and a water level line is provided on the inner wall of the soaking tank.

[0019] The beneficial effects of this utility model are:

[0020] By driving the rotating rod, flipping rod, and connecting rod to rotate, the board fixed by the clamping component can be automatically transferred between the soaking tank and the rinsing tank without manual or complex mechanical intervention, reducing operation steps and avoiding the problem of excessive etching solution residue time caused by transfer delay, thus effectively improving the processing accuracy of the circuit board.

[0021] The rinsing assembly employs a dual cleaning method of "water flow + airflow": the water guide pipe sprays rinsing water through the spray nozzle, while the air guide pipe sprays gas through the air jet nozzle. Both are tilted downwards at 45°, which can specifically remove residual etching solution from small gaps and corners of the board. Compared with traditional single water flow rinsing, the cleaning is more thorough. At the same time, the rinsing assembly works in conjunction with the lifting assembly. The second motor in the lifting assembly drives the screw to rotate, and under the guidance of the positioning rod, it can move the frame up and down, thereby realizing the height adjustment of the spray nozzle and air jet nozzle in the rinsing assembly. Through this height adjustment, the rinsing assembly can perform a comprehensive cleaning of the board from top to bottom. First, the water flow is used to rinse away most of the etching solution, and then the airflow is used to rinse away the residue, ensuring a better cleaning effect for the board.

[0022] The clamping assembly pushes the extrusion plate with a hydraulic rod. Together with the clamping plate and the extrusion pad inside the clamping groove, it can stably clamp boards of different specifications. The clamping plate can rotate around the fixed rod. The arc-shaped design at the bottom of the extrusion plate allows it to extrude the outside of the clamping plate more smoothly. The limiting plate increases its stability and guides its movement. The clamping assembly can quickly clamp and remove the boards, thereby improving the etching efficiency of the circuit board. Attached Figure Description

[0023] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the connection between the rotating rod and the drive assembly of this utility model;

[0026] Figure 3 This is a schematic diagram of the internal structure of the box body of this utility model;

[0027] Figure 4 This is a cross-sectional structural diagram of the box body of this utility model;

[0028] Figure 5 This is a schematic diagram showing the connection between the rotating rod, the flipping rod, the connecting rod, the scraper, the clamping assembly, and the plate body of this utility model.

[0029] Figure 6 This is an enlarged structural diagram of point A in this utility model;

[0030] Figure 7 This is a schematic diagram of the scraper, clamping assembly and plate body of this utility model;

[0031] Figure 8 This is a schematic diagram of the scraper and clamping assembly of this utility model;

[0032] Figure 9 This is a schematic diagram of the connection between the lifting assembly and the flushing assembly of this utility model;

[0033] Figure 10 This is a schematic diagram of the rinsing assembly of this utility model;

[0034] In the picture:

[0035] 11. Cabinet; 12. Partition; 13. Drive assembly; 14. Hanging plate; 15. Clamping assembly; 16. Plate; 17. Flushing assembly; 18. Lifting assembly;

[0036] 111. Drainage pipe; 112. Water level line;

[0037] 121. Notch; 122. Through hole; 123. Rotating rod; 124. Flipping rod; 125. Connecting rod; 126. Limiting block; 1231. Bearing; 1251. Annular groove;

[0038] 131. First gear; 132. First motor; 133. Second gear;

[0039] 151. Hanging rod; 152. Fixing rod; 153. Clamping plate; 154. Hydraulic rod; 155. Extrusion plate; 156. Limiting plate; 1551. Groove;

[0040] 171. Frame; 172. Water guide pipe; 173. Spray head; 174. First corrugated pipe; 175. Water inlet pipe; 176. Air guide pipe; 177. Jet head; 178. Second corrugated pipe; 179. Air inlet pipe; 1710. Connecting plate; 17101. Screw hole; 17102. Positioning hole;

[0041] 181. Fixing plate; 182. Second motor; 183. Screw; 184. Positioning rod. Detailed Implementation

[0042] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0043] Please see Figures 1-10 This utility model provides a technical solution: a printed circuit board etching device, including a housing 11, with a partition 12 fixedly installed in the middle of the housing 11, dividing the housing 11 into a rinsing pool on the left and a soaking pool on the right. The top of the partition 12 has two notches 121, and the end of the partition 12 has a through hole 122 penetrating the two notches 121. A rotating rod 123 is rotatably inserted into the through hole 122. A flipping rod 124 is fixedly connected to each of the two notches 121 of the rotating rod 123. A connecting rod 125 is fixedly connected to the end of each flipping rod 124 away from the rotating rod 123. A hanging plate 14 is rotatably connected to the connecting rod 125. 4. Clamping components 15 are fixedly installed at both ends of the bottom, and the plate body 16 is clamped between the two clamping components 15. A rinsing component 17 is provided in the rinsing pool, and a lifting component 18 connected to the rinsing component 17 is installed in the rinsing pool. The box 11 is divided into a rinsing pool and an immersion pool by the partition 12, realizing an integrated layout of immersion and rinsing during the etching process, saving space. The hanging plate 14 and the plate body 16 are moved between the two pools by the rotating rod 123, the flipping rod 124 and other structures, without the need for additional complex equipment, simplifying the operation process and avoiding the problem of etching solution residue caused by transfer delay. At the same time, the rinsing component 17 and the lifting component 18 are provided in the rinsing pool, laying the foundation for efficient rinsing.

[0044] like Figure 3 , Figure 4 and Figure 5As shown, both ends of the through hole 122 are provided with shaft grooves, and both ends of the rotating rod 123 are fixedly fitted with bearings 1231 located in the shaft grooves. A drive assembly 13 connected to one end of the rotating rod 123 is fixedly installed on the outside of the housing 11. Limiting blocks 126 are fixedly installed on both sides of the partition plate 12 and below the two notches 121. The top of the limiting blocks 126 and the corners away from the partition plate 12 are all set as bevels. Both ends of the connecting rod 125 are provided with annular grooves 1251. The hanging plate 14 is set in a U-shape, and the tops of both ends of the hanging plate 14 are respectively rotatably fitted into the two annular grooves 1251. At the same time, the bearings 1231 at both ends of the rotating rod 123 reduce rotational friction and extend the service life of the equipment; the drive assembly 13 provides power to realize the automatic transfer of the plate 16 and improve efficiency; the limiting block 126 and its top inclined surface can limit the flipping angle of the flipping rod 124. When the flipping rod 124 is in contact with the inclined surface at the top of the limiting block 126, the suspended plate 16 is just at the appropriate height in the soaking tank or rinsing tank. The hanging plate 14 is rotatably connected to the connecting rod 125 through the annular groove 1251 to ensure the stability of the plate 16 during transfer, and the overall smoothness and stability of the device operation are enhanced.

[0045] like Figure 2 As shown, the drive assembly 13 includes a first gear 131, a first motor 132, and a second gear 133. The first gear 131 is fixedly installed at one end of the rotating rod 123, the first motor 132 is fixedly installed on the outside of the housing 11, and the second gear 133 is fixedly installed at the output end of the first motor 132. The top end of the second gear 133 meshes with the bottom end of the first gear 131. The drive assembly 13 adopts gear transmission, which has high transmission efficiency and compact structure. It can accurately transmit the power of the first motor 132, so that the rotating rod 123 rotates stably, ensuring that the plate 16 is accurately transferred between the two pools, thus improving the accuracy and reliability of the device operation.

[0046] like Figures 5-8As shown, the clamping assembly 15 includes a hanging rod 151, a clamping plate 153, a hydraulic rod 154, and a pressing plate 155. The hanging rod 151 is fixedly installed at the bottom of the hanging plate 14, and a clamping groove is formed at the bottom end of the hanging rod 151. The clamping plate 153 is disposed in the clamping groove, and a fixing rod 152, which is fixedly connected to the hanging rod 151, is inserted through the top end of the clamping plate 153. The hydraulic rod 154 is fixedly installed on the side of the hanging plate 14, and the pressing plate 155 is fixedly installed on the telescopic end of the hydraulic rod 154. The pressing plate 155 is in contact with the outer side of the hanging rod 151. When the clamping plate 153 is in a vertical state, the outer side of the clamping plate 153 is flush with the side of the hanging rod 151. An extrusion pad is fixedly installed on the inner side of the clamping groove. The bottom end of the extrusion plate 155 is arc-shaped, and a slot 1551 is opened on the side of the extrusion plate 155. A limiting plate 156 fixedly connected to the hanging rod 151 is inserted through the slot 1551. The clamping assembly 15 pushes the extrusion plate 155 to cooperate with the clamping plate 153 through the hydraulic rod 154, which can stably clamp different specifications of plates 16 and has strong versatility. The extrusion pad prevents the plate 16 from being damaged. The arc-shaped bottom end of the extrusion plate 155 and the limiting plate 156 ensure reliable clamping action. The clamping plate 153 can rotate around the fixed rod 152, which facilitates quick loading and unloading of the plate 16 and improves etching efficiency and ease of operation.

[0047] like Figure 3 , Figure 9 and Figure 10 As shown, the rinsing assembly 17 includes a frame 171, a water pipe 172, and an air pipe 176. The water pipe 172 is horizontally fitted in a U-shape on the upper half of the outer side of the frame 171. Multiple neatly arranged spray nozzles 173 penetrating the frame 171 are fixedly installed on the vertical part of the water pipe 172. A water inlet is fixedly installed at the top of the horizontal end of the water pipe 172, and a first corrugated pipe 174 is fixedly connected to the water inlet. A water inlet pipe 175 mounted on the top of the housing 11 is fixedly connected to the top of the first corrugated pipe 174. The air pipe 176 is horizontally fitted in a U-shape on the lower half of the outer side of the frame 171. A water inlet pipe 175 mounted on the vertical part of the air pipe 176 is fixedly installed on the upper half of the frame 171. Multiple neatly arranged jet heads 177 are installed, running through the frame 171. An air inlet is fixedly installed at the top of the horizontal and vertical end of the air duct 176, and a second corrugated pipe 178 is fixedly connected to the air inlet. An air inlet pipe 179 mounted on the top of the box 11 is fixedly connected to the top of the second corrugated pipe 178. The flushing assembly 17, combined with the water duct 172 and the air duct 176, forms a dual cleaning of water flow and air flow. Compared with a single water flow, it is easier to remove small gaps and corner residues. The first corrugated pipe 174 and the second corrugated pipe 178 can be extended and retracted to adapt to the lifting and lowering of the flushing assembly 17 without affecting the water and air intake, thus improving the thoroughness and flexibility of flushing.

[0048] like Figure 3 , Figure 9 and Figure 10As shown, the ends of the water spray head 173 and the air jet head 177 that penetrate the frame 171 are both set to be inclined downward at 45°. A connecting plate 1710 is fixedly installed at the end of the frame 171 away from the first bellows 174. A screw hole 17101 is opened in the middle of the connecting plate 1710. Positioning holes 17102 are opened on the connecting plate 1710 on both sides of the screw hole 17101. The water spray head 173 and the air jet head 177 are inclined downward at 45°, which enhances the targeted rinsing force on the surface of the plate 16. The screw hole 17101 and the positioning hole 17102 of the connecting plate 1710 provide a stable structure for connection with the lifting assembly 18, ensuring that the rinsing assembly 17 does not deviate when it is raised and lowered, ensuring accurate rinsing position, and improving the stability of the rinsing effect.

[0049] like Figure 3 , Figure 9 and Figure 10 As shown, the lifting assembly 18 includes a fixed plate 181, a second motor 182, a screw 183, and positioning rods 184. The fixed plate 181 is fixedly installed on the inner wall of the left side of the washing pool of the housing 11, and the fixed plate 181 is located directly above the connecting plate 1710. The second motor 182 is fixedly installed on the top of the fixed plate 181. The top end of the screw 183 is fixedly connected to the output end of the second motor 182, and the bottom end of the screw 183 is threaded through and inserted into the screw hole 17101 on the connecting plate 1710. Two positioning rods 184 are provided. Each positioning rod 184 is inserted through two positioning holes 17102 on the connecting plate 1710, and the two ends of the positioning rod 184 are fixedly connected to the bottom of the fixing plate 181 and the bottom of the rinsing pool, respectively. The lifting assembly 18 drives the screw 183 through the second motor 182, and drives the rinsing assembly 17 to rise and fall smoothly under the guidance of the positioning rod 184, so as to achieve height adjustment and thoroughly clean the plate 16. The positioning rod 184 ensures the stability and verticality during lifting. The structure is simple and the control is precise, which can flexibly adapt to the cleaning needs of different plates 16.

[0050] like Figure 1 and Figure 3 As shown, a drain pipe 111 connected to the bottom of the rinsing tank is fixedly installed on the left side of the housing 11. A water level line 112 is provided on the inner wall of the immersion tank. The drain pipe 111 facilitates the timely discharge of wastewater generated during rinsing, keeping the rinsing tank clean and avoiding affecting subsequent rinsing. The water level line 112 in the immersion tank can intuitively indicate the amount of etching solution, ensuring that the plate 16 is completely immersed, ensuring consistent etching effect, and improving the convenience of using the device and the stability of etching quality.

[0051] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A printed circuit board etching apparatus, characterized in that, include: The box (11) has a partition (12) fixedly installed in the middle of the interior. The partition (12) divides the box (11) into a rinsing pool on the left and a soaking pool on the right. The top of the partition (12) has two notches (121), and the end of the partition (12) has a through hole (122) that passes through the two notches (121). The rotating rod (123) is rotatably inserted into the through hole (122). The two notches (121) of the rotating rod (123) are fixedly connected to the flipping rod (124). The ends of the two flipping rods (124) away from the rotating rod (123) are fixedly connected to the connecting rod (125). The hanging plate (14) is rotatably connected to the connecting rod (125); The clamping assembly (15) is provided in two sets and is respectively installed at both ends of the bottom of the hanging plate (14), and the plate body (16) is clamped between the two clamping assemblies (15); A flushing assembly (17) is installed inside the flushing tank; The lifting assembly (18) is installed in the flushing pool and connected to the flushing assembly (17).

2. The printed circuit board etching apparatus according to claim 1, characterized in that, Both ends of the through hole (122) are provided with shaft grooves. Both ends of the rotating rod (123) are fixedly fitted with bearings (1231) located in the shaft grooves. The outer side of the housing (11) is fixedly installed with a drive assembly (13) connected to one end of the rotating rod (123). Both sides of the partition (12) and below the two notches (121) are fixedly installed with limit blocks (126). The top of the limit blocks (126) and the corners away from the partition (12) are all set as inclined surfaces. Both ends of the connecting rod (125) are provided with annular grooves (1251). The hanging plate (14) is set as a U-shape, and the tops of both ends of the hanging plate (14) are respectively rotated and fitted into the two annular grooves (1251).

3. The printed circuit board etching apparatus according to claim 2, characterized in that, The drive assembly (13) includes a first gear (131), a first motor (132), and a second gear (133). The first gear (131) is fixedly installed at one end of the rotating rod (123), the first motor (132) is fixedly installed on the outside of the housing (11), and the second gear (133) is fixedly installed at the output end of the first motor (132), with the top end of the second gear (133) meshing with the bottom end of the first gear (131).

4. The printed circuit board etching apparatus according to claim 1, characterized in that, The clamping assembly (15) includes a hanging rod (151), a clamping plate (153), a hydraulic rod (154), and a pressing plate (155). The hanging rod (151) is fixedly installed at the bottom of the hanging plate (14), and a clamping groove is provided at the bottom end of the hanging rod (151). The clamping plate (153) is disposed in the clamping groove, and a fixing rod (152) fixedly connected to the hanging rod (151) is inserted through the top end of the clamping plate (153). The hydraulic rod (154) is fixedly installed on the side of the hanging plate (14), and the pressing plate (155) is fixedly installed on the side of the hanging plate (14). The extension end of the pressure rod (154) and the pressing plate (155) are attached to the outside of the hanging rod (151). When the clamping plate (153) is in a vertical state, the outside of the clamping plate (153) is flush with the side of the hanging rod (151). The pressing pads are fixedly installed on the inside of the clamping plate (153) and the clamping groove. The bottom end of the pressing plate (155) is set in an arc shape. The side of the pressing plate (155) is provided with a groove (1551). A limiting plate (156) fixedly connected to the hanging rod (151) is inserted through the groove (1551).

5. The printed circuit board etching apparatus according to claim 1, characterized in that, The flushing assembly (17) includes a frame (171), a water guide pipe (172), and an air guide pipe (176). The water guide pipe (172) is horizontally fitted in a U-shape on the upper half of the outer side of the frame (171). Multiple neatly arranged spray nozzles (173) penetrating the frame (171) are fixedly installed on the vertical part of the water guide pipe (172). A water inlet is fixedly installed at the top of the horizontal end of the water guide pipe (172), and a first corrugated pipe (174) is fixedly connected to the water inlet. A support frame is fixedly connected to the top of the first corrugated pipe (174). At the top of the housing (11), there is a water inlet pipe (175). The air guide pipe (176) is horizontally sleeved in a U-shape on the lower half of the outer side of the frame (171). Multiple neatly arranged jet nozzles (177) that penetrate the frame (171) are fixedly installed on the vertical part of the air guide pipe (176). An air inlet is fixedly installed at the top of the horizontal end of the air guide pipe (176), and a second corrugated pipe (178) is fixedly connected at the air inlet. An air inlet pipe (179) mounted on the top of the housing (11) is fixedly connected at the top of the second corrugated pipe (178).

6. The printed circuit board etching apparatus according to claim 5, characterized in that, The spray nozzle (173) and jet nozzle (177) are both inclined downward at 45° through one end of the frame (171). A connecting plate (1710) is fixedly installed at the end of the frame (171) away from the first corrugated pipe (174). A screw hole (17101) is provided in the middle of the connecting plate (1710). Positioning holes (17102) are provided on both sides of the screw hole (17101) on the connecting plate (1710).

7. The printed circuit board etching apparatus according to claim 6, characterized in that, The lifting assembly (18) includes a fixed plate (181), a second motor (182), a screw (183), and a positioning rod (184). The fixed plate (181) is fixedly installed on the inner wall of the left side of the flushing pool of the housing (11), and the fixed plate (181) is located directly above the connecting plate (1710). The second motor (182) is fixedly installed on the top of the fixed plate (181). The top end of the screw (183) is fixedly connected to the output end of the second motor (182), and the bottom end of the screw (183) is threaded through and inserted into the screw hole (17101) on the connecting plate (1710). There are two positioning rods (184). The two positioning rods (184) are respectively inserted through and inserted into the two positioning holes (17102) on the connecting plate (1710), and the two ends of the positioning rods (184) are respectively fixedly connected to the bottom of the fixed plate (181) and the bottom of the flushing pool.

8. The printed circuit board etching apparatus according to claim 1, characterized in that, A drain pipe (111) connected to the bottom of the rinsing pool is fixedly installed on the left side of the box (11), and a water level line (112) is provided on the inner wall of the soaking pool.

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