CN110891371A - Circuit board oil supplementing device - Google Patents

Abstract

The circuit board oil supplementing device provided by the embodiment of the invention comprises a vacuum cover covering a circuit board on the periphery of a target hole and an air extractor communicated with the vacuum cover; the vacuum cover is characterized by further comprising an oil injection device, wherein the oil injection device comprises an oil injection pipeline and a control device for controlling the on-off of the oil injection pipeline, the oil injection pipeline comprises an oil injection port arranged in the vacuum cover, and the oil injection port faces the target hole. The vacuum cover is arranged on the circuit board at the periphery of the target hole of the ink to be filled, a sealing cavity communicated with the target hole is formed between the vacuum cover and the circuit board, air in the sealing cavity is extracted by the air extractor, air in the target hole can be correspondingly extracted at the same time, the degree of vacuum in the hole is reduced, the ink is not blocked by the air in the hole when the ink is filled, the ink can more easily enter the inside of the target hole and fill the target hole which is not filled with the ink, the work efficiency of filling the ink in the circuit board is facilitated, and the quality of ink plug holes is improved.

Description

Circuit board oil supplementing device

Technical Field

The invention relates to the technical field of printed circuit board manufacturing, in particular to an oil supplementing device for a circuit board.

Background

With the development of Printed Circuit Board (PCB) technology and the evolution of product complexity, PCB boards have been developed to the design and application of multilayer boards, in order to realize the electrical connection between the circuits of each layer of unit boards of a multilayer PCB Board, via holes penetrating through the Board surface are formed on the PCB Board, the hole walls of the via holes are provided with conductive materials such as copper materials, and the circuits on each layer of unit boards are connected through the conductive materials on the via holes.

Because the circuit board must be etched in the production process, so that the metal material on the via hole wall is damaged by the etching solution, in the prior art, ink is filled into the conductive hole for hole plugging treatment, so that an anti-corrosion material is formed on the via hole wall in advance to protect the via hole wall from being damaged by the etching solution. However, the aperture sizes of the via holes on the PCB are different, the amount of ink required to be filled in the via holes with different apertures is different, and the via holes with different apertures are filled with ink, so that the ink in partial via holes cannot be completely filled in the via holes.

However, the PCB is contacted with the atmosphere to cause the holes to contain air, air is wrapped between the ink which is inserted during manual oil supplement and the solidified ink which exists in the through holes, the flowing property of the ink is poor, and the ink is difficult to be completely filled in the through holes due to the obstruction of the air.

Disclosure of Invention

The embodiment of the invention provides an oil supplementing device for a circuit board, which is used for solving the problems that in the prior art, air is contained in holes due to the fact that a PCB contacts with the atmosphere, air is wrapped between ink plugged in the manual oil supplementing process and ink existing in through holes, the flowing property of the ink is poor, and the ink is difficult to be completely filled in the through holes due to the obstruction of the air.

The embodiment of the invention provides an oil supplementing device for a circuit board, which comprises a vacuum cover and an air extractor, wherein the vacuum cover covers the circuit board at the periphery of a target hole; the vacuum cover is characterized by further comprising an oil injection device, the oil injection device comprises an oil injection pipeline and a control device for controlling the on-off of the oil injection pipeline, the oil injection pipeline comprises an oil injection port arranged in the vacuum cover, and the oil injection port faces the target hole.

The oil supplementing device for the circuit board comprises a vacuum cover, a piston and a driving piece, wherein the vacuum cover is arranged on the vacuum cover, the piston is movably arranged in the vacuum cover, and the driving piece is arranged between the piston and the vacuum cover and drives the piston to move relative to the vacuum cover.

The circuit board oil supplementing device is characterized in that the driving piece is arranged outside the vacuum cover, the vacuum cover is provided with a mounting hole, and the piston extends out of the vacuum cover from the mounting hole and is connected with the driving piece; and a clamping ring for sealing is arranged between the piston and the mounting hole, and the clamping ring is made of elastic material.

The oil supplementing device for the circuit board further comprises a pressure relief piece arranged between the inside and the outside of the vacuum cover, and the clamping ring is the pressure relief piece.

The circuit board oil supplementing device comprises a driving part, a driving part and a vacuum cover, wherein the driving part comprises a bracket arranged on the vacuum cover and a driving arm hinged with the bracket; one end of the driving arm is hinged to the piston, and the other end of the driving arm is an operating end.

The circuit board oil supplementing device comprises a vacuum cover, a vacuum pump, a gas pipeline and a fan, wherein the vacuum cover is provided with a vacuum hole, the vacuum hole is communicated with the vacuum hole, and the fan is used for pumping air in the vacuum cover through the gas pipeline.

The circuit board oil supplementing device comprises an oil injecting device, an oil injecting device and a control device, wherein the oil injecting device comprises an ink box arranged outside the vacuum cover, one end of the oil injecting pipeline is connected with the ink box, and the other end of the oil injecting pipeline extends into the vacuum cover; the oil injection port is arranged on the oil injection pipeline positioned in the vacuum cover.

The oil supplementing device for the circuit board comprises a vacuum cover, a vacuum pump and an oil supplementing device, wherein the vacuum cover is movably arranged on the circuit board, the vacuum cover is provided with a mounting hole, and the piston extends out of the mounting hole; the oil injection device comprises an ink box arranged on the outer side of the vacuum cover; one end of the oil filling pipeline is connected with the ink box, and the other end of the oil filling pipeline extends into the vacuum cover; the oil injection port is arranged on the oil injection pipeline positioned in the vacuum cover.

The circuit board oil supplementing device is characterized in that the oil injection pipeline is a vertically extending pipeline, the oil cartridge is positioned at the top end of the oil injection pipeline, and the oil injection port is positioned at the bottom end of the oil injection pipeline; the oil filling port is located above the target hole.

The circuit board oil supplementing device is characterized in that the bottom surface of the oil box is in a concave semicircular shape, and the oil filling pipeline is connected to the lowest point of the bottom surface of the oil box.

The circuit board oil supplementing device further comprises a shell arranged between the oil cartridge and the vacuum cover, the shell is wrapped on the outer side of the oil injection pipeline, and an operation hole is formed in the position corresponding to the control device.

The circuit board oil supplementing device comprises a control device and a control device, wherein the control device comprises a switch valve arranged on the oil filling pipeline.

The oil supplementing device for the circuit board comprises a rubber pad paved above the circuit board, wherein a first through hole which is not smaller than the target hole is formed in the position, corresponding to the target hole, of the rubber pad.

The circuit board oil supplementing device is characterized in that an illuminating device for providing illumination for the circuit board is arranged outside the vacuum cover.

According to the circuit board oil supplementing device provided by the embodiment of the invention, the vacuum cover covering the via hole of the circuit board is used for forming the closed space communicated with the via hole above the via hole, air in the closed space is pumped out through the air pumping device, and when the vacuum degree of the closed space is reduced to the first preset value, the control device opens the oil injection pipeline so as to fill ink in the via hole. In the whole operation process, air in the through hole is sucked away by the air suction device, ink can easily enter the through hole without being blocked by air, and the oil supplementing efficiency is improved. Meanwhile, the vacuum cover can only cover the upper part of the via hole to be filled, the whole circuit board does not need to be vacuumized, vacuum is released after filling is completed, the vacuum cover is moved to the next via hole to be filled, and the vacuum cover can be applied circularly, is simple in structure and is convenient to operate. The problem of through manual mend oil time, the parcel has the air between the printing ink of filling in and the printing ink that has existed in the via hole, leads to printing ink to be difficult to fill in the via hole is solved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a circuit board oil filling device according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a rubber mat according to an embodiment of the present invention.

Description of reference numerals:

1: a circuit board;

11: a targeting orifice;

2: a vacuum hood;

3: an air extraction device;

31: a piston;

32: a drive member;

4: an oiling device;

41: an oil injection pipeline;

42: a control device;

43: an ink cartridge;

5: a snap ring;

6: a housing;

7: a rubber pad;

71: a first through hole;

8: an illumination device.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

In the present invention, unless otherwise specifically stated, the terms "mounted," "connected," "fixed," and the like are to be understood broadly, and for example, may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or communicable with each other; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected internally or in any other manner known to those skilled in the art, unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Fig. 1 is a schematic structural diagram of a circuit board oil replenishment device provided in an embodiment of the present invention, and fig. 2 is a schematic structural diagram of a rubber mat provided in an embodiment of the present invention.

Please refer to fig. 1 and fig. 2. The embodiment provides an oil supplementing device for a circuit board, and aims to improve operability of a printed circuit board plug supplementing process, so that oil supplementing efficiency of the circuit board to be repaired is improved, and product rejection rate is reduced. At present, after a hole is plugged once due to factors such as process fluctuation, processing errors and the like in the manufacturing process of a high-density printed circuit board, the situation that ink in some via holes is not full, and the situation that the ink leaks or is half plugged needs to be manually replenished with the oil. An operator holds a slender metal rod with a sharp end to pick up part of the ink, covers the through hole and plugs the ink. Because a certain amount of solidified ink exists in the through hole, part of air is wrapped between the newly inserted ink and the solidified ink, the fluidity of the ink is poor, and the air can block the ink from further entering the through hole, so that the oil supplementing operation is difficult, and the production efficiency is influenced; and the via hole ink after plugging contains bubbles with larger volume, so that the quality of the plugged hole is poor.

In order to solve the above technical problem, as shown in fig. 1, the circuit board oil filling device provided in this embodiment includes a vacuum cover 2 covering the circuit board 1 at the periphery of the target hole 11 and an air extracting device 3 communicated with the vacuum cover 2; the vacuum cover also comprises an oil injection device 4, wherein the oil injection device 4 comprises an oil injection pipeline 41 and a control device 42 for controlling the on-off of the oil injection pipeline 41, the oil injection pipeline 41 comprises an oil injection port arranged in the vacuum cover 2, and the oil injection port faces the target hole 11.

The oil injection device 4 may be disposed inside the vacuum cover 2, or may be disposed outside the vacuum cover 2, as long as it is ensured that the oil injection port can smoothly inject the ink into the target hole 11, and the specific disposition of the oil injection device 4 is not limited in this embodiment. The specific number of the oil filling ports can be changed according to actual conditions, for example, when the area of the circuit board 1 is leaked, the number of the oil filling ports can be increased to provide plug repairing efficiency. It will be appreciated that at least one oil fill port aligned with the target hole 11 is required to fill the hole with ink. In the actual use process, firstly, an operator checks the appearance of each batch of produced circuit boards and determines the circuit boards 1 needing ink filling, wherein the circuit boards comprise single-hole half plugs, leakage plugs and area leakage plugs, the vacuum cover 2 is covered on the area where the target hole 11 exists, the part of the target hole 11 which is not filled with the ink faces the vacuum cover 2, a sealed cavity is formed between the vacuum cover 2 and the circuit boards 1, the air extractor 3 correspondingly extracts the air in the sealed cavity and also extracts the air in the target hole 11, after the air extraction is finished, the control device 42 is opened, the oil injection pipeline 41 injects the ink into the target hole 11 through the oil injection port to fill the hole to be flat, and after the target hole 11 is filled with the oil, the subsequent process is heated and ground to completely solidify the ink and flatten the surface of the filled ink, and finally, the filling work is finished.

It should be noted that the target hole 11 described in this embodiment refers to a via hole that has undergone a hole plugging process in the first production process, but the ink is not completely filled or leaked. For the target hole 11 which is not completely filled with the ink, because a certain amount of solidified ink is filled in the hole, when the vacuum cover 2 is covered on the circuit board 1 at the periphery of the target hole 11, air can not enter and exit the vacuum cover 2 through the target hole 11, and the whole area can form effective sealing; to the via hole of leaking the stopper, can be provided with the structure that can seal this drill way in the one side that targeted hole 11 deviates from the oiling mouth, for example, can adopt the rubber pad that covers at circuit board 1 surface, avoid leaking the targeted hole 11 of stopper and make seal chamber and external atmosphere intercommunication, lead to unable formation effective seal between circuit board 1 and the vacuum hood 2.

In addition, in this embodiment, a rubber seal ring may be disposed on the surface of the vacuum cover 2 contacting the circuit board 1, so that the vacuum cover 2 may be more effectively attached to the surface of the circuit board 1, and the sealing performance thereof may be improved.

The circuit board oil supplementing device provided by the embodiment is characterized in that the vacuum cover 2 is arranged on the circuit board 1 at the periphery of the target hole 11 for ink to be supplemented, so that a sealing cavity communicated with the target hole 11 is formed between the circuit board 1 and the vacuum cover 2, air in the sealing cavity is extracted by the air extracting device 3, air in the target hole 11 can be correspondingly extracted at the same time, the vacuum degree in the target hole 11 is reduced, the ink is not blocked by air in the hole when being supplemented, and the ink can more easily enter the target hole 11 and fully fill the target hole 11 which is not fully filled. In the use, operating personnel only need open air exhaust device 3 and bleed to utilize oiling device 4 to pour into printing ink into can, the operation mode is simple, and operation method is simple and convenient, the effectual benefit stopper efficiency that has improved. Meanwhile, the air content between the newly replenished ink and the solidified ink in the hole is low, and the ink does not contain large-volume bubbles after the filling is finished, so that the hole filling quality is improved, and the scrapping cost is reduced.

The air extractor 3 comprises a piston 31 movably arranged in the vacuum housing 2 and a driving member 32 arranged between the piston 31 and the vacuum housing 2, wherein the driving member 32 drives the piston 31 to move relative to the vacuum housing 2. Through the removal of piston 31, the volume of the seal chamber in the vacuum cover 2 changes, when needing to mend and fill in printing ink, piston 31 at first moves to the first position that makes the seal chamber volume increase by initial position, and corresponding air volume also can increase the back density simultaneously and can reduce to make the vacuum degree of target hole 11 reduce, be favorable to reducing the air resistance that the printing ink received in filling in target hole 11.

Alternatively, the piston 31 may be driven electrically, mechanically, etc., and the present embodiment is not limited thereto.

It should be noted that the aperture of each via hole on the circuit board 1 is generally between 0.2 mm and 1 mm, the volume to be filled of the target hole 11 not filled with the oil plug is small, the volume of the sealed cavity does not need to be changed greatly, and the vacuum degree in the hole can be reduced rapidly. It can be understood that the smaller the volume of the sealed chamber, the larger the volume occupied by the piston 31 in the initial position in the sealed chamber, and the more drastic the degree of change in the vacuum level in the target hole 11 when the piston 31 moves. In a possible implementation mode, the outer wall of the piston 31 and the inner wall of the vacuum cover 2 are attached to each other, when the vacuum cover 2 covers the target hole 11, the volume of the sealed cavity is very small, and the piston moves a small distance to quickly reduce the air density in the target hole 11, so as to achieve a low vacuum state.

In addition, in the embodiment, when the ink is plugged into the target hole 11, the hole is not required to be completely empty of air, that is, the ink is in a complete vacuum state, and the practical use result shows that the ink can be plugged into the via hole smoothly due to the fact that the air density is low.

Further, in the present embodiment, the driving member 32 is disposed outside the vacuum housing 2, the vacuum housing 2 has a mounting hole, and the piston 31 extends out of the vacuum housing 2 from the mounting hole and is connected to the driving member 32; a snap ring 5 for sealing is provided between the piston 31 and the mounting hole, and the snap ring 5 is made of an elastic material. When the piston 31 is in the initial position, it is partly inside the vacuum enclosure 2 and partly outside the vacuum enclosure 2. The piston 31 is driven by the driving piece 32 to move outwards from the inside of the vacuum cover 2, so that the volume of the piston 31 in the vacuum cover 2 is reduced, the air volume of the sealed cavity is increased, and the vacuum degree of the target hole 11 is reduced. The snap ring 5 made of elastic material can be always kept in contact with the outer wall of the piston 31 in the moving process of the piston 31, and a good sealing effect is provided.

It should be noted that, in the present embodiment, no specific requirement is made on the elastic material used for the snap ring 5, as long as a good sealing effect is provided for the piston 31. For example, the snap ring 5 may be made of a common sealing material such as natural rubber, urethane rubber, or the like.

Further, in order to facilitate the movement of the circuit board oil supplementing device to the next target hole 11 to be supplemented after the completion of the supplement, the circuit board oil supplementing device described in this embodiment may further include a pressure relief member disposed between the inside and the outside of the vacuum enclosure 2, and the snap ring 5 is a pressure relief member. After the circuit board oil supplementing device completes the supplement of one circuit board to be repaired, the pressure relief piece quickly releases the vacuum in the vacuum cover 2, so that the circuit board oil supplementing device can be circularly applied to the next circuit board 1 to be supplemented.

During the concrete implementation, chucking piston 31 when piston 31 moves to the vacuum chamber 2 outside, chucking power is greater than the air pressure that the piston received and is in order to keep the position of piston 31 unchangeable to keep the seal chamber in the vacuum chamber 2 to be in low vacuum state all the time at the benefit stopper in-process, release snap ring 5 when the pressure release, piston 31 is automatic to get back to initial position under the effect of the internal and external pressure difference, the completion is to the release of pressure.

In addition, this embodiment still provides another possible implementation of the pressure relief piece, and the pressure relief piece can be provided with a through hole extending to the sealed cavity on the vacuum enclosure 2 besides the snap ring 5, and the through hole is plugged by the plug, and it is only necessary to pull out the plug when the vacuum needs to be released.

Further, in order to simplify the driving manner of the driving member 32 to the piston 31, the driving member 32 may further include a bracket disposed on the vacuum hood 2 and a driving arm hinged to the bracket; one end of the driving arm is hinged to the piston 31, and the other end is an operating end. The driving arm and the bracket form a lever structure, the bracket is a fulcrum of the driving arm, and an operator presses an operating end of the driving arm to move the piston 31 to the outside of the vacuum hood 2, so that the vacuum degree in the target hole 11 is reduced. The pure mechanical driving structure can avoid noise, and meanwhile, an operator can judge the distance of the piston 31 to move according to actual conditions, so that the control of the vacuum degree in the vacuum cover 2 is facilitated. In addition, the piston 31 can be fixed at a desired position by a clamping force applied by the snap ring 5 after being moved to the position.

Alternatively, the piston 31 may be vertically oriented to facilitate an operator pressing on the actuating arm to lift the piston 31 upward.

During the concrete realization, be provided with the through-hole that the position corresponds between actuating arm and the support, the through-hole interpolation has the pin, and the actuating arm is connected and is rotatory between pin and the support. Similarly, the other end of the drive arm may be connected to the piston by a pin to form an articulated connection.

As an alternative implementation manner, the air extracting device 3 provided in the present embodiment further includes a gas pipeline communicated with the vacuum enclosure 2, and a blower for extracting air in the vacuum enclosure 2 through the gas pipeline. When the air-purifying device is used and installed, the fan is connected to an external power supply through a lead and a switch, and an operator closes the switch to extract air in the target hole 11.

Further, the oil injection device 4 comprises an ink box 43 arranged outside the vacuum cover 2, one end of the oil injection pipeline 41 is connected with the ink box 43, and the other end of the oil injection pipeline extends into the vacuum cover 2; the oil filler port is provided in an oil filler line 41 located inside the vacuum casing 2. The ink cartridge 43 stores ink to be filled into the target hole 11, and it is understood that the ink in the ink cartridge 43 is in a flowing state and is cured by a subsequent process after the ink is filled into the target hole 11. In addition, a cap is provided above the ink cartridge 43 to prevent dust from entering the ink.

As a possible embodiment, the air-extracting means 3 comprises a piston 31 movably arranged on the vacuum housing 2, the vacuum housing 2 having a mounting hole from which the piston 31 protrudes. The oiling device 4 includes an ink cartridge 43 disposed outside the vacuum housing 2. The oil injection pipeline 41 is connected with the ink box 43 at one end and extends into the vacuum cover 2 at the other end. The oil filler port is provided in an oil filler line 41 located inside the vacuum casing 2.

When the circuit board oil filling device described in this embodiment is used, firstly, an operator checks the appearance of the circuit board and sorts out the circuit board 1 having the target hole 11 with a leaking plug, a half plug or an area leaking plug, the vacuum cover 2 is covered on the circuit board 1 at the periphery of the target hole 11 to form a sealed cavity, and the part of the target hole 11 which is not filled up is arranged towards the vacuum cover 2. The piston 31 is driven by the driving part 32 to move outwards from the inside of the vacuum cover 2, the volume of the piston 31 positioned in the vacuum cover 2 is reduced, the volume of air in a corresponding sealed cavity is increased, the vacuum degree in the target hole 11 is reduced, the air content is reduced, at the moment, the control device 42 conducts the oil injection pipeline 41 and injects ink into the target hole 11 through the oil injection port, and the oil injection pipeline 41 is closed after the ink is filled. The piston 31 can then be released by the pressure relief element to return to its initial position and ready for the next target hole 11 to be filled with oil. And (4) heating and grinding the target hole 11 filled with the ink for subsequent outflow to finish the plug repairing work.

Further, optionally, the oil injection pipeline 41 is a vertically extending pipeline, the ink cartridge 43 is located at the top end of the oil injection pipeline 41, and the oil injection port is located at the bottom end of the oil injection pipeline 41; the oil filler point is located above the target hole 11. The circuit board oil supplementing device vertically arranged is small in size and convenient to use. After the control device 42 is connected with the oil injection pipeline 41, the ink can be automatically injected into the target hole 11 under the action of gravity, and a device for driving the ink to move does not need to be additionally arranged, so that the equipment is simplified, and financial resources and material resources are saved.

Alternatively, the bottom surface of the ink tank 43 is formed in a concave semicircular shape, and the oil filling line 41 is connected to the lowest point of the bottom surface of the ink tank 43. The ink is in a flowable state, the ink in the ink box 43 can be promoted to be concentrated at the lowest point of the bottom surface of the ink box under the action of gravity by the aid of the bottom surface of the concave semicircular ink box, and the oil filling pipeline 41 is connected with the bottom surface of the ink box 43, so that ink residue is reduced, and waste of the ink is avoided.

Further, in this embodiment, the circuit board oil supplementing device further includes a housing 6 disposed between the oil cartridge 43 and the vacuum housing 2, the housing 6 is wrapped and disposed outside the oil injection pipeline 41, and an operation hole is disposed at a position corresponding to the control device 42. One end of the shell 6 is connected to the bottom surface of the ink box 43, and the other end is connected to the vacuum cover 2, so that the oil box 43 is supported, and the oil injection pipeline 41 is prevented from being broken by the gravity extrusion of the ink box 43. The access opening facilitates access and operation of the control device 42 by an operator. Of course, the control device 42 may be controlled wirelessly, and the operator may control the device by a remote controller, or in this case, the housing 6 may not be provided with an operation hole.

It should be noted that, in the present embodiment, the specific material used for the housing 6 is not limited, and for example, the housing may be made of common plastic or metal.

As a possible implementation, the control device 42 comprises a switch valve arranged on the oil injection line 41. An operator can contact the switch valve through the operation hole and open the switch valve, so that the ink in the ink box 43 can be quickly injected into the through hole under the action of gravity, the switch valve is closed to cut off the whole oil injection pipeline 41, and the oil injection is stopped. Besides the switch function, the switch valve can also specifically adjust the flow, so that the ink accumulation on the surface of the through hole due to the over-high flowing speed is prevented.

Further, in order to improve the sealing performance between the vacuum cover 2 and the circuit board 1, the circuit board oil supplementing device further comprises a rubber pad 7 laid above the circuit board 1, and a first through hole 71 which is not smaller than the target hole is formed in the position, corresponding to the target hole 11, of the rubber pad 7. The surface of the circuit board 1 is provided with various structures, which is not completely flat, especially the circuit board 1 welded with components and parts, the surface of the circuit board 1 is provided with various convex parts, the sealing edge of the vacuum cover 2 is difficult to be completely contacted with the circuit board 1, small gaps exist, a layer of rubber pad 7 made of softer material is laid on the circuit board 1, the convex parts on the circuit board 1 are covered by the rubber pad 7, the rubber pad 7 covers the convex objects and is completely attached to the bottom surface of the circuit board 1, the sealing edge of the vacuum cover 2 is contacted with the rubber pad 7, and therefore the sealing performance of the vacuum cover 2 to the circuit board 1 is ensured.

Optionally, in this embodiment, an illumination device 8 for providing illumination to the circuit board 1 is disposed outside the vacuum enclosure 2. The operator can clearly observe the plugging condition of the circuit board target hole 11 by means of the lighting device 8, and excessive ink in the plugging condition is prevented from being accumulated outside the through hole. Illustratively, the illumination device 8 may include a light source, such as a light emitting diode or a conventional incandescent light bulb, and a switch connected to a power source, wherein the light source may be turned on by an operator in case of dim light to clearly observe the clogging of the ink in the target hole 11.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (14)

1. The circuit board oil supplementing device is characterized by comprising a vacuum cover and an air extractor, wherein the vacuum cover covers a circuit board on the periphery of a target hole, and the air extractor is communicated with the vacuum cover; the vacuum cover is characterized by further comprising an oil injection device, the oil injection device comprises an oil injection pipeline and a control device for controlling the on-off of the oil injection pipeline, the oil injection pipeline comprises an oil injection port arranged in the vacuum cover, and the oil injection port faces the target hole.

2. The circuit board oil supplementing device of claim 1, wherein the air extractor comprises a piston movably disposed in the vacuum cover and a driving member disposed between the piston and the vacuum cover, the driving member driving the piston to move relative to the vacuum cover.

3. The circuit board oil supplementing device of claim 2, wherein the driving member is disposed outside the vacuum cover, the vacuum cover has a mounting hole, and the piston extends out of the vacuum cover from the mounting hole and is connected with the driving member; and a clamping ring for sealing is arranged between the piston and the mounting hole, and the clamping ring is made of elastic material.

4. The circuit board oil supplementing device of claim 3, further comprising a pressure relief member disposed between the inside and the outside of the vacuum enclosure, wherein the snap ring is the pressure relief member.

5. The circuit board oil supplementing device according to any one of claims 2 to 4, wherein the driving member includes a bracket disposed on the vacuum hood and a driving arm hinged to the bracket; one end of the driving arm is hinged to the piston, and the other end of the driving arm is an operating end.

6. The circuit board oil supplementing device according to claim 1, wherein the air extracting device comprises a gas pipeline communicated with the vacuum enclosure, and a fan for extracting air in the vacuum enclosure through the gas pipeline.

7. The circuit board oil supplementing device of claim 1, wherein the oil supplementing device comprises an ink box arranged outside the vacuum cover, one end of the oil supplementing pipeline is connected with the ink box, and the other end of the oil supplementing pipeline extends into the vacuum cover; the oil injection port is arranged on the oil injection pipeline positioned in the vacuum cover.

8. The circuit board oil supplementing device of claim 1, wherein the air extracting device comprises a piston movably arranged on the vacuum cover, the vacuum cover is provided with a mounting hole, and the piston extends out of the mounting hole; the oil injection device comprises an ink box arranged on the outer side of the vacuum cover; one end of the oil filling pipeline is connected with the ink box, and the other end of the oil filling pipeline extends into the vacuum cover; the oil injection port is arranged on the oil injection pipeline positioned in the vacuum cover.

9. The circuit board oil supplementing device according to claim 6 or 7, wherein the oil injection pipeline is a vertically extending pipeline, the oil cartridge is located at the top end of the oil injection pipeline, and the oil injection port is located at the bottom end of the oil injection pipeline; the oil filling port is located above the target hole.

10. The circuit board oil supplementing device of claim 9, wherein the bottom surface of the ink box is in a concave semicircular shape, and the oil filling pipeline is connected to the lowest point of the bottom surface of the ink box.

11. The circuit board oil supplementing device of claim 6 or 7, further comprising a housing disposed between the ink cartridge and the vacuum cover, wherein the housing is wrapped and disposed outside the oil injection pipeline, and an operation hole is formed at a position corresponding to the control device.

12. The circuit board oil supplementing device of claim 1, wherein the control device comprises a switch valve provided on the oil filling line.

13. The circuit board oil supplementing device according to claim 1, comprising a rubber pad laid above the circuit board, wherein the rubber pad is provided with a first through hole which is not smaller than the target hole and corresponds to the target hole.

14. The circuit board oil supplementing device of claim 1, wherein an illumination device for providing illumination to the circuit board is arranged outside the vacuum cover.

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