CN219068522U

CN219068522U - PCB cleaning machine convenient to height-adjusting

Info

Publication number: CN219068522U
Application number: CN202223427228.8U
Authority: CN
Inventors: 张年伟; 万仁泉
Original assignee: Changzhou Qiaozhiyi Electronic Equipment Co ltd
Current assignee: Changzhou Qiaozhiyi Electronic Equipment Co ltd
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-05-23
Anticipated expiration: 2032-12-20

Abstract

The utility model belongs to the technical field of cleaning, in particular to a PCB cleaning machine convenient for height adjustment, which comprises a bottom plate; the middle part is equipped with the protection box on the bottom plate, and bottom plate upper edge department is equipped with the support column, and the outside one side of support column slides and is equipped with the sliding ring, and the support column opposite side is equipped with the gear strip, and sliding ring one side is connected with the link, and gear strip one side meshing has the worm wheel, and worm wheel one side meshing has the worm, and worm wheel one end rotation setting is connected with first motor output on the link, and the sliding ring is kept away from the one side fixedly connected with first support frame of link, and first support frame inside rotates and is equipped with first threaded rod; when the PCB is placed on the placement element connected with the second support frame during operation, the first motor is started, the worm drives the worm wheel to rotate, and then the spray head is driven to move through the first connecting rod, so that the PCB is cleaned, the phenomenon that the organic solvent splashes on the skin of a user when the PCB is cleaned is reduced, and the damage to the skin of a worker is reduced.

Description

PCB cleaning machine convenient to height-adjusting

Technical Field

The utility model relates to the technical field of cleaning, in particular to a PCB cleaning machine convenient for height adjustment.

Background

The name of PCB is printed circuit board, also called printed circuit board, which is an important electronic component, is a support of electronic components, is a carrier for electrical connection of electronic components, and has strict use requirement.

After the soldering of the electronic components or the soldering with the external wires is completed, various residues such as tin dross are usually left on the surface of the PCB, and the residues gradually cause problems such as reduced electrical insulation performance and short circuit, and the residues must be removed by cleaning.

The existing PCB board generally adopts a way of manually brushing the welding position on the surface of the PCB board by using a water solution for washing the PCB board with a brush and cleaning the PCB board by using a PCB cleaning machine, and when the PCB board is cleaned, the problem that the skin is damaged due to the fact that an organic solvent is sprayed onto the skin when the PCB board is cleaned generally occurs, and the health of workers is damaged.

Disclosure of Invention

In order to overcome the defects in the prior art and solve at least one technical problem in the background art, the utility model provides a PCB cleaning machine convenient for height adjustment.

The technical scheme adopted for solving the technical problems is as follows: the PCB cleaning machine convenient for height adjustment comprises a bottom plate; the middle part is equipped with the protection box on the bottom plate, and bottom plate upper edge department is equipped with the support column, support column outside one side slides and is equipped with the sliding ring, and support column opposite side is equipped with the gear strip, sliding ring one side is connected with the link, gear strip one side meshing has the worm, worm wheel one end rotates to set up on the link and is connected with first motor output, one side fixedly connected with first support frame of link is kept away from to the sliding ring, first support frame inside rotates and is equipped with first threaded rod, and first threaded rod one end is connected with second motor output, first threaded rod external screw thread is equipped with first thread piece, and first thread piece both ends slip sets up in the inslot that first support frame offered, first thread piece one side is connected with the head rod, first head rod one side is installed to first support frame bottom side symmetry is equipped with the second connecting rod, and the second connecting rod other end is connected with the second support frame; when the PCB board is placed on the placing element that the second support frame is connected during operation, start first motor, first motor output drives the worm, make the worm drive worm wheel take place to rotate, worm wheel one side takes place the meshing motion with gear strip gear side, and then drive the link and go up and down the motion, the link drives the sliding ring and slide on the support column, the sliding ring drives first support frame and goes up and down the motion, first support frame passes through the second connecting rod and drives the second support frame, make the second support frame follow it and go up and down the motion, when the second support frame enters into the protection box, start the second motor, second motor output drives first threaded rod, make first screw thread piece both ends slide in the inslot of seting up of first support frame, and then carry out the washing work to the PCB board through the head, reduce the phenomenon that organic solvent splashes to user's skin at the PCB board, reduce the injury that the worker skin received, first motor and second motor are servo motor, when the position of the protection box reaches the appointed height simultaneously, can stop spraying work with the shower nozzle, the second thread piece moves the protection box in the position of the protection box in the time, utilize the cleaning solution to protect the PCB board in the protection box.

Preferably, two ends of the inside of the second support frame are respectively connected with a second threaded rod in a rotating way, the two second threaded rods are connected with each other through a rotating rod, one end of one second threaded rod is connected with the output end of the third motor, second threaded rods are externally provided with second threaded blocks in a threaded way, two ends of each second threaded block are slidably arranged in grooves formed in the inside of the second support frame, one end of each second threaded block is fixedly connected with a third connecting rod, a fourth connecting rod penetrates through the outside of the rotating rod, and the fourth connecting rod is fixedly connected with the second support frame; during operation, start the third motor, the third motor output drives two second threaded rods and takes place to rotate for second threaded rod takes place the thread motion rather than the second thread piece of outside threaded connection, and two second thread piece internal screw threads are opposite, make second thread piece both ends slide in the inslot that the second support frame was seted up, drive the third connecting rod and cooperate the fourth connecting rod to carry out the centre gripping to the PCB board, carry out the centre gripping work to the PCB board, reduce the phenomenon that the PCB board drops from working position when wasing.

Preferably, a rotating shaft is arranged in the fourth connecting rod in a rotating way, one end of the rotating shaft is fixedly connected with a first bevel gear, the other end of the rotating shaft is fixedly connected with a rotating plate, one side of the first bevel gear is meshed with a second bevel gear, the other side of the second bevel gear is meshed with a third bevel gear, and one end of the second bevel gear is connected with the output end of the fourth motor; during operation starts the fourth motor, and the fourth motor output drives the second bevel gear and rotates, and then drives first bevel gear and third bevel gear and take place the meshing motion, through the pivot, drives the revolving board of fourth connecting rod one side and rotates, and the revolving board of third connecting rod one side also rotates through the pivot and is connected for the PCB board by two revolving boards centre gripping rotates, and then improves the cleaning zone of PCB board, washs the positive and negative of PCB board, improves the cleaning performance.

Preferably, springs are arranged in the rotating plate at equal intervals, and a buffer plate is elastically arranged in the rotating plate through the springs; during operation when the rotating plate carries out the centre gripping to the PCB board, the buffer board can contact with the PCB board, under the thrust effect of rotating the board for the buffer board passes through the spring and carries out elastic expansion at the rotating plate inside, reduces the damage that causes the PCB board when the centre gripping.

Preferably, the two rotating plates are connected with each other through a telescopic rod; during operation telescopic link comprises sleeve and loop bar, and the loop bar stretches out and draws back in sleeve inside, and when the fourth connecting rod drove the revolving board and carries out the displacement, the loop bar can stretch out and draw back in sleeve inside, is used for placing the PCB board on the telescopic link.

Preferably, one side of the protection box is provided with a liquid outlet pipe; when the cleaning liquid in the protection box reaches the designated height or needs to be replaced during operation, liquid discharge operation can be performed through the liquid outlet pipe.

The utility model has the advantages that:

1. according to the utility model, the PCB is placed on the placement element connected with the second support frame, the first motor is started, the output end of the first motor drives the worm, the worm drives the worm wheel to rotate, one side of the worm wheel and the gear side of the gear strip are meshed, the connecting frame is driven to make the connecting frame perform lifting movement, the connecting frame drives the slip ring to slide on the support column, the slip ring drives the first support frame to perform lifting movement, the first support frame drives the second support frame through the second connecting rod, the second support frame is made to follow the second support frame to perform lifting movement, when the second support frame enters the protective box, the second motor is started, the output end of the second motor drives the first threaded rod, the two ends of the first threaded block slide in a groove formed in the first support frame, the first threaded block drives the spray head to move through the first connecting rod, the PCB is cleaned, the phenomenon that an organic solvent sprays on the skin of a user is reduced, and the damage to the skin of the user is reduced, and after a period of working, the first motor and the second motor are servo motors, the position of the cleaning liquid of the protective box is designated to be high, the spraying operation can be stopped, and the cleaning liquid can be cleaned in the protective box by the protective box after the second support frame reaches a certain height; starting a third motor, wherein the output end of the third motor drives two second threaded rods to rotate, so that the second threaded rods are in threaded movement with second threaded blocks connected with the external threads of the second threaded rods, the internal threads of the two second threaded blocks are opposite, the two ends of the second threaded blocks slide in grooves formed in the second supporting frame, the third connecting rod is driven to clamp the PCB by matching with the fourth connecting rod, the PCB is clamped, and the phenomenon that the PCB falls from a working position during cleaning is reduced; starting a fourth motor, wherein the output end of the fourth motor drives a second bevel gear to rotate, so as to drive a first bevel gear and a third bevel gear to perform meshing motion, and driving a rotating plate on one side of a fourth connecting rod to rotate through a rotating shaft, and the rotating plate on one side of the third connecting rod is also rotationally connected through the rotating shaft, so that a PCB clamped by the two rotating plates rotates, the cleaning area of the PCB is further improved, the front side and the back side of the PCB are cleaned, and the cleaning effect is improved; when the rotating plate clamps the PCB, the buffer plate can be contacted with the PCB, under the thrust action of the rotating plate, the buffer plate elastically stretches and contracts in the rotating plate through the spring, and damage to the PCB during clamping is reduced; the telescopic link comprises sleeve and loop bar, and the loop bar stretches out and draws back in sleeve inside, and when the fourth connecting rod drove the revolving board and carries out the displacement, the loop bar can stretch out and draw back in sleeve inside, is used for placing the PCB board on the telescopic link.

2. According to the utility model, when the cleaning liquid in the protection box reaches the designated height or needs to be replaced, liquid discharge can be performed through the liquid outlet pipe; simultaneously through the universal wheel that bottom plate bottom symmetry set up can be convenient for this device remove, the push rod can improve the comfort level of user when removing this device.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is a schematic view of a structure of a PCB cleaner for facilitating height adjustment according to a first embodiment;

FIG. 2 is a schematic diagram of a supporting column of a PCB cleaning machine with height adjustment function according to the first embodiment;

fig. 3 is a schematic structural view of a first support frame of a PCB cleaner with a height convenient to adjust according to the first embodiment;

fig. 4 is a schematic structural view of a second supporting frame of a PCB cleaning machine according to the first embodiment, which is convenient for adjusting the height;

fig. 5 is a schematic view of a fourth connecting rod of a PCB cleaner for facilitating height adjustment according to the first embodiment;

fig. 6 is a schematic view of a rotating plate structure of a PCB cleaner for facilitating height adjustment according to the first embodiment;

fig. 7 is a schematic diagram of a push rod structure of a PCB cleaner with a height adjustment function according to the second embodiment.

In the figure: 1. a bottom plate; 2. a support column; 3. a slip ring; 4. a connecting frame; 5. a gear strip; 6. a worm wheel; 7. a worm; 8. a first motor; 9. a first support frame; 10. a first threaded rod; 11. a second motor; 12. a first threaded block; 13. a first connecting rod; 14. a spray head; 15. a second connecting rod; 16. a second support frame; 17. a rotating rod; 18. a second threaded rod; 19. a third motor; 20. a second threaded block; 21. a third connecting rod; 22. a fourth connecting rod; 23. a first bevel gear; 24. a second bevel gear; 25. a fourth motor; 26. a third bevel gear; 27. a rotating plate; 28. a spring; 29. a buffer plate; 30. a telescopic rod; 31. a liquid outlet pipe; 32. a protective case; 33. a universal wheel; 34. a push rod.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

Referring to FIGS. 1-6, a PCB cleaner for facilitating height adjustment includes a base plate 1; the middle part is provided with a protection box 32 on the bottom plate 1, the upper edge of the bottom plate 1 is provided with a support column 2, one side outside the support column 2 is slidably provided with a slip ring 3, the other side of the support column 2 is provided with a gear bar 5, one side of the slip ring 3 is connected with a connecting frame 4, one side of the gear bar 5 is meshed with a worm wheel 6, one side of the worm wheel 6 is meshed with a worm 7, one end of the worm wheel 6 is rotatably arranged on the connecting frame 4 and is connected with the output end of a first motor 8, one side, far away from the connecting frame 4, of the slip ring 3 is fixedly connected with a first supporting frame 9, a first threaded rod 10 is rotatably arranged inside the first supporting frame 9, one end of the first threaded rod 10 is connected with the output end of a second motor 11, the external threads of the first threaded rod 10 are provided with first threaded blocks 12, two ends of the first threaded blocks 12 are slidably arranged in grooves formed in the first supporting frame 9, one side of the first threaded blocks 12 is connected with a first connecting rod 13, one side of the first connecting rod 13 is provided with a spray head 14, the bottom side of the first supporting frame 9 is symmetrically provided with a second connecting rod 15, and the other end of the second connecting rod 16 is connected with a second connecting rod 16; when the PCB board is placed on the placement element that second support frame 16 is connected during operation, start first motor 8, first motor 8 output drives worm 7, make worm 7 drive worm wheel 6 take place to rotate, worm wheel 6 one side takes place the meshing motion with the gear side of gear strip 5, and then drive link 4 makes it carry out elevating movement, link 4 drives sliding ring 3 and slides on support column 2, sliding ring 3 drives first support frame 9 and carries out elevating movement, first support frame 9 drives second support frame 16 through second connecting rod 15, make second support frame 16 follow its elevating movement, when second support frame 16 enters into protective box 32, start second motor 11, second motor 11 output drives first threaded rod 10, make first thread piece 12 both ends slide in the inslot of seting up of first support frame 9, and then drive shower nozzle 14 through first connecting rod 13 and carry out the cleaning work, reduce the phenomenon that the organic solvent splashes the user skin at the PCB board, reduce the injury that the skin received, first motor 8 and second motor 11 are servo motor 16 when the protective box 32 is gone into, can be in the protective box 32 is reached at the same time when the high position of the cleaning liquid is all, the protective box 32 is reached, the cleaning liquid 32 is moved to the protective box 32 in the protective box is reached.

The two ends of the inside of the second support frame 16 are respectively and rotatably connected with a second threaded rod 18, two second threaded rods 18 are connected with each other through a rotating rod 17, one end of each second threaded rod 18 is connected with the output end of a third motor 19, second threaded blocks 20 are arranged on the outer threads of each second threaded rod 18, the two ends of each second threaded block 20 are slidably arranged in grooves formed in the inside of the second support frame 16, one end of each second threaded block 20 is fixedly connected with a third connecting rod 21, a fourth connecting rod 22 penetrates through the outside of each rotating rod 17, and the fourth connecting rods 22 are fixedly connected with the second support frame 16; during operation, the third motor 19 is started, the output end of the third motor 19 drives the two second threaded rods 18 to rotate, so that the second threaded rods 18 and the second threaded blocks 20 connected with the external threads of the second threaded rods are in threaded motion, the internal threads of the two second threaded blocks 20 are opposite, the two ends of the second threaded blocks 20 slide in the grooves formed in the second supporting frame 16, the third connecting rod 21 is driven to clamp the PCB by matching with the fourth connecting rod 22, the PCB is clamped, and the phenomenon that the PCB falls from the working position during cleaning is reduced.

A rotating shaft is rotatably arranged in the fourth connecting rod 22, one end of the rotating shaft is fixedly connected with a first bevel gear 23, the other end of the rotating shaft is fixedly connected with a rotating plate 27, one side of the first bevel gear 23 is meshed with a second bevel gear 24, the other side of the second bevel gear 24 is meshed with a third bevel gear 26, and one end of the second bevel gear 24 is connected with the output end of a fourth motor 25; during operation, the fourth motor 25 is started, the output end of the fourth motor 25 drives the second bevel gear 24 to rotate, and then drives the first bevel gear 23 and the third bevel gear 26 to perform meshing motion, through the rotating shaft, the rotating plate 27 on one side of the fourth connecting rod 22 is driven to rotate, and the rotating plate 27 on one side of the third connecting rod 21 is also connected through the rotating shaft in a rotating manner, so that the PCB clamped by the two rotating plates 27 rotates, the cleaning area of the PCB is further improved, the front side and the back side of the PCB are cleaned, and the cleaning effect is improved.

Springs 28 are arranged in the rotary plate 27 at equal intervals, and a buffer plate 29 is elastically arranged in the rotary plate 27 through the springs 28; during operation when the rotating plate 27 carries out the centre gripping to the PCB board, the buffer board 29 can contact with the PCB board, under the thrust effect of rotating plate 27 for the buffer board 29 carries out elasticity flexible through spring 28 in rotating plate 27 inside, reduces the damage that causes the PCB board when the centre gripping.

The two rotating plates 27 are connected with each other through a telescopic rod 30; the during operation telescopic link 30 comprises sleeve and loop bar, and the loop bar stretches out and draws back in the sleeve is inside, and when fourth connecting rod 22 drove the swivel plate 27 and carries out the displacement, the loop bar can stretch out and draw back in the sleeve is inside, is used for placing the PCB board on the telescopic link 30.

A liquid outlet pipe 31 is arranged on one side of the protection box 32; when the cleaning liquid in the protective box 32 reaches a designated height or needs to be replaced during operation, liquid discharge operation can be performed through the liquid outlet pipe 31.

Example two

Referring to fig. 7, in a first comparative example, as another embodiment of the present utility model, universal wheels 33 are symmetrically arranged at the bottom of the bottom plate 1, and push rods 34 are installed at the upper edge of the bottom plate 1; the universal wheels 33 symmetrically arranged at the bottom of the bottom plate 1 can facilitate the movement of the device in operation, and the push rod 34 can improve the comfort level of a user when the device is moved.

The working principle is that the PCB board is placed on a placement element connected with the second support frame 16, the first motor 8 is started, the output end of the first motor 8 drives the worm 7, the worm 7 drives the worm wheel 6 to rotate, one side of the worm wheel 6 and the gear side of the gear bar 5 are meshed, the connecting frame 4 is driven to make lifting movement, the connecting frame 4 drives the sliding ring 3 to slide on the support column 2, the sliding ring 3 drives the first support frame 9 to lift movement, the first support frame 9 drives the second support frame 16 through the second connecting rod 15, the second support frame 16 is enabled to follow the second support frame 16 to lift movement, when the second support frame 16 enters the protective box 32, the second motor 11 is started, the output end of the second motor 11 drives the first threaded rod 10, two ends of the first threaded block 12 slide in a groove formed in the first support frame 9, and then the first connecting rod 13 drives the spray head 14 to move, the PCB board is cleaned, the phenomenon that an organic solvent splashes onto the skin of a user is reduced, the skin is damaged by the first motor 8 and the second motor 11 is driven by the second motor 15, when the second motor 11 enters the protective box 32, the protective box 32 is stopped at a certain time, and the protective box 32 can be protected by the cleaning liquid 32 is sprayed in the protective box 32; starting a third motor 19, wherein the output end of the third motor 19 drives two second threaded rods 18 to rotate, so that the second threaded rods 18 and second threaded blocks 20 which are in threaded connection with the outside of the second threaded rods are in threaded movement, the internal threads of the two second threaded blocks 20 are opposite, two ends of the second threaded blocks 20 slide in grooves formed in the second supporting frame 16, a third connecting rod 21 is driven to clamp a PCB by matching with a fourth connecting rod 22, the PCB is clamped, and the phenomenon that the PCB falls from a working position during cleaning is reduced; starting a fourth motor 25, wherein the output end of the fourth motor 25 drives a second bevel gear 24 to rotate, and then drives a first bevel gear 23 and a third bevel gear 26 to perform meshing motion, and driving a rotating plate 27 on one side of a fourth connecting rod 22 to rotate through a rotating shaft, and the rotating plate 27 on one side of the third connecting rod 21 is also connected through the rotating shaft in a rotating way, so that a PCB clamped by the two rotating plates 27 rotates, the cleaning area of the PCB is further improved, the front side and the back side of the PCB are cleaned, and the cleaning effect is improved; when the rotating plate 27 clamps the PCB, the buffer plate 29 can be contacted with the PCB, under the thrust action of the rotating plate 27, the buffer plate 29 elastically stretches and contracts in the rotating plate 27 through the springs 28, and damage to the PCB during clamping is reduced; the telescopic rod 30 consists of a sleeve and a loop rod, the loop rod stretches inside the sleeve, when the fourth connecting rod 22 drives the rotating plate 27 to displace, the loop rod stretches inside the sleeve, and the telescopic rod 30 is used for placing a PCB; when the cleaning liquid in the protective box 32 reaches a designated height or needs to be replaced, the liquid discharge work can be performed through the liquid outlet pipe 31; simultaneously, the universal wheels 33 symmetrically arranged at the bottom of the bottom plate 1 can facilitate the movement of the device, and the push rod 34 can improve the comfort level of a user when the device is moved.

In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims.

Claims

1. PCB cleaning machine convenient to height-adjusting, its characterized in that: comprises a bottom plate (1); the middle part is equipped with protection box (32) on bottom plate (1), just bottom plate (1) upper edge department is equipped with support column (2), support column (2) outside one side slip is equipped with sliding ring (3), just support column (2) opposite side is equipped with gear strip (5), sliding ring (3) one side is connected with link (4), gear strip (5) one side meshing has worm wheel (6), worm wheel (6) one side meshing has worm (7), worm wheel (6) one end rotation sets up on link (4) be connected with first motor (8) output, sliding ring (3) are kept away from one side fixedly connected with first support frame (9) of link (4), first support frame (9) inside rotation is equipped with first threaded rod (10), just first threaded rod (10) one end is connected with second motor (11) output, first threaded rod (10) outside screw thread is equipped with first thread piece (12), just first thread piece (12) both ends slip sets up first support frame (9) are seted up with first motor (8) output, one side connecting rod (13), the bottom side of the first supporting frame (9) is symmetrically provided with a second connecting rod (15), and the other end of the second connecting rod (15) is connected with a second supporting frame (16).

2. The PCB cleaning machine of claim 1, wherein the PCB cleaning machine is adapted to facilitate height adjustment, wherein: the inside both ends of second support frame (16) rotate respectively and are connected with second threaded rod (18), and two interconnect between second threaded rod (18) through bull stick (17), one second threaded rod (18) one end is connected with third motor (19) output, second threaded rod (18) external screw thread is equipped with second screw thread piece (20), just second screw thread piece (20) both ends sliding arrangement are in the inslot of seting up of second support frame (16), second screw thread piece (20) one end fixedly connected with third connecting rod (21), the bull stick (17) outside runs through fourth connecting rod (22), just fourth connecting rod (22) with second support frame (16) fixed connection.

3. The PCB cleaning machine of claim 2, wherein the PCB cleaning machine is adapted to facilitate height adjustment, wherein: the inside rotation of fourth connecting rod (22) is equipped with the pivot, pivot one end fixedly connected with first bevel gear (23), other end fixedly connected with revolving plate (27), first bevel gear (23) one side meshing has second bevel gear (24), second bevel gear (24) opposite side meshing has third bevel gear (26), second bevel gear (24) one end is connected with fourth motor (25) output.

4. A PCB cleaning machine for facilitating height adjustment according to claim 3, wherein: the inside equidistance of rotating plate (27) is equipped with spring (28), just rotating plate (27) is through spring (28) inside elasticity is equipped with buffer board (29).

5. The PCB cleaner of claim 4, wherein the height adjustment is facilitated by: the two fourth connecting rods (22) are connected with each other through a telescopic rod (30).

6. The PCB cleaner of claim 5, wherein the height adjustment is facilitated by: one side of the protection box (32) is provided with a liquid outlet pipe (31).