A circuit board etching device

Abstract

The invention discloses a circuit board etching device, comprising an etching base and a conveyor belt, wherein the conveyor belt is embedded in the middle part of the etching base, and the side end face of the conveyor belt is fixedly connected to a carrier substrate through a flipping mechanism, the flexible circuit board is placed on the surface of the carrier substrate and is sprayed and etched during the conveying process of the conveyor belt, and the flipping mechanism comprises a limiting cross bar, a positioning ring, a telescopic ring, a rotating ring and an extending convex rod, the limiting cross bar is fixedly connected to the middle part of the inner wall of the etching base, and the limiting cross bar is fitted with the top of the conveyor belt, the positioning ring is fixedly connected to the side end face of the conveyor belt, the telescopic ring is elastically connected to the inside of the positioning ring, the rotating ring is fixedly connected to the two ends of the carrier substrate, and the side end faces of the rotating ring are symmetrically provided with extending convex rods on both sides, and the end of the extending convex rod facing away from the rotating ring extends out of the upper end face of the conveyor belt. The device can solve the high efficiency and stability of flipping and double-sided etching of high-precision flexible circuit boards during etching.

Description

Technical Field

[0001] The present invention relates to the technical field of etching equipment, and particularly relates to a circuit board etching device. Background Art

[0002] Etching is a technology that removes some materials by using chemical reactions or physical impacts. Etching technology can be divided into two categories: wet etching and dry etching. It was first used to manufacture intaglio printing plates such as copper plates and zinc plates, and is also widely used in the processing of lightweight instrument panels, nameplates, and thin workpieces that are difficult to process by traditional processing methods. Through continuous improvement and the development of process equipment, it can also be used in the processing of precision-etched products of electronic thin parts in the aviation, machinery, and chemical industries. Especially in the semiconductor manufacturing process, etching is an indispensable technology.

[0003] Chinese Patent Publication No. CN203399422U discloses a circuit board etching device, which has a conveying device for conveying the circuit board in a predetermined direction. Above the conveying position, there are at least one spraying device and at least one jetting device. The spraying device is connected to a pump and can spray etching liquid onto the circuit board placed on the conveying device, and the jetting device is connected to an air compressor and can spray high-pressure gas onto the circuit board. The spraying device and the jetting device are arranged along the conveying direction of the conveying device, and each jetting device is interspersed between each spraying device, and each jetting device is arranged behind each spraying device in the conveying direction, so that after the circuit board is sprayed with etching liquid by the spraying device, the etching liquid remaining on it can be blown away by the high-pressure gas of the jetting device.

[0004] The existing etching equipment has a too long production line during double-sided etching, and both traditional clamping turning or roller turning have disadvantages. Clamping turning has a large clamping blind area that interferes with etching, and roller turning has a large shock to the circuit board and cannot be applied to high-precision circuit boards such as flexible circuit boards.

[0005] Therefore, it is necessary to provide a circuit board etching device to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a circuit board etching device to solve the above technical problems.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A circuit board etching device includes an etching base and a conveyor belt. The conveyor belt is embedded in the middle of the etching base. The side end face of the conveyor belt is fixedly connected to a carrier substrate through a turning mechanism. The flexible circuit board is placed on the surface of the carrier substrate and is sprayed with etching liquid during the conveying process along with the conveyor belt.

[0008] Furthermore, the conveyor belt is arranged on both sides of the inner wall of the etching base, and the carrier substrate has multiple groups evenly arranged between the conveyor belts. The flexible circuit board is transported by the carrier substrate driven by the conveyor belt. The carrier substrate can also be used for.

[0009] As a further solution of the present invention, the flipping mechanism includes a limiting cross bar, a positioning ring, a telescopic ring, a rotating ring and an extending protrusion rod, the limiting cross bar is fixedly connected to the middle part of the inner wall of the etching base, and the limiting cross bar is in contact with the top of the conveyor belt, the positioning ring is fixedly connected to the side end surface of the conveyor belt, the telescopic ring is elastically connected to the inside of the positioning ring, the rotating ring is fixedly connected to the two ends of the supporting substrate, and extension protrusion rods are symmetrically provided on both sides of the side end surface of the rotating ring, and the extension protrusion rod extends out of the upper end surface of the conveyor belt at one end facing away from the rotating ring.

[0010] As a further solution of the present invention, the telescopic ring is symmetrically provided with an arc groove at one end away from the positioning ring, the rotating ring is provided with an arc protrusion adapted to the arc groove, and a driving rod is provided in the middle of the telescopic ring, and the driving rod extends through the middle of the rotating ring.

[0011] Furthermore, a limiting slide bar is provided on the side end face of the telescopic ring, a slide groove matched with the limiting slide bar is provided on the inner wall of the positioning ring, the telescopic ring is embedded in the interior of the positioning ring through a spring, and the telescopic ring is limited in rotation by the limiting slide bar.

[0012] As a further solution of the present invention, the supporting substrate includes a fixed part and a driving part, the driving part is symmetrically distributed at both ends of the fixed part, the side of the driving part away from the fixed part is connected to the rotating ring, the fixed part includes a symmetrically arranged cascade part, and the cascade part has a first supporting plate and a second supporting plate that are alternately telescopic and slidably connected inside.

[0013] Furthermore, the cross section of the cascade is a horizontal "U" shape, and the first supporting plate and the second supporting plate are respectively slidably connected to the ends of the "U" shape.

[0014] As a further solution of the present invention, a sliding cavity is opened inside the driving part, and a driving slide is slidably connected inside the sliding cavity. The driving slide is drivingly connected to the driving rod, and driving inclined panels are symmetrically slidably on the top and bottom of the sliding cavity. The two side edges of the driving slide are in contact with the inclined surfaces of the driving inclined panels, and the driving inclined panels are fixedly connected to the first supporting plate and the second supporting plate.

[0015] As a further solution of the present invention, the driving skateboard includes a counterweight plate and a connecting plate, the counterweight plate is rotatably connected to the end of the driving rod away from the telescopic ring, the connecting plate is slidably connected to both sides of the counterweight plate, the first supporting plate and the second supporting plate are connected at the same section by a flexible tooth plate, and a tooth rod meshing with the flexible tooth plate is provided inside the cascade component.

[0016] As a further solution of the present invention, suction cups are provided on the surfaces of the first supporting plate and the second supporting plate, negative pressure chambers connected to the suction cups are provided inside the first supporting plate and the second supporting plate, an exhaust chamber connected to the sliding chamber is provided inside the driving part, the driving inclined plate is slidably connected inside the exhaust chamber, a one-way air intake structure is provided on the inner wall of the exhaust chamber, and the exhaust chamber is connected to the negative pressure chamber.

[0017] Furthermore, the suction cup can be replaced with a microporous structure, and the first support plate and the second support plate can be set to various shapes such as grids and meshes as needed. The driving inclined plate is fitted with the inner wall of the exhaust cavity, and the driving inclined plate can form a sealed cavity with the exhaust cavity through a flexible seal.

[0018] As a further scheme of the present invention, the one-way air intake structure includes a suction cup and a one-way sealing plate, the suction cup is connected to the exhaust chamber and extends through to the outer end face of the driving part, the end of the suction cup facing away from the exhaust chamber is elastically fitted with a one-way sealing plate through an elastic member, the cross-section of the one-way sealing plate is trapezoidal, the side with a smaller contact surface of the one-way sealing plate is fitted with the end of the suction cup, and the side of the driving inclined plate that is fitted with the exhaust chamber is provided with an exhaust rod matched with the suction cup.

[0019] When the present invention is used, the flexible circuit board is placed on the surface of the carrier substrate, and the carrier substrate drives the flexible circuit board to move under the spray etching nozzle through the conveyor belt so that the etching liquid is evenly distributed on the surface of the flexible circuit board. A turning mechanism is also provided so that the carrier substrate can drive the flexible circuit board to turn over during the process of conveying the flexible circuit board, thereby completing double-sided etching of the circuit board at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 is a schematic structural diagram of a carrier substrate of the present invention;

[0023] Figure 3 It is a schematic diagram of the telescopic ring structure of the present invention;

[0024] Figure 4 It is a schematic diagram of the rotating ring structure of the present invention;

[0025] Figure 5 It is a schematic diagram of the internal structure of the driving part of the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the driving slide plate of the present invention;

[0027] Figure 7 Schematic diagram of the fixing part structure of the present invention;

[0028] Figure 8 Schematic diagram of the negative pressure chamber structure of the present invention;

[0029] Figure 9 is the Figure 5 enlarged structure diagram at position A in the present invention;

[0030] Figure 10 is the Figure 7 enlarged structure diagram at position B in the present invention;

[0031] Figure 11 Schematic diagram of the structure of the fixing part of the present invention in the fixed state;

[0032] Figure 12 Schematic diagram of the structure of the driving part of the present invention in the driving state.

[0033] In the figure: 1, etching base; 2, conveyor belt; 3, limiting cross bar; 4, carrier substrate; 5, flexible circuit board; 6, positioning ring; 7, telescopic ring; 8, rotating ring; 9, fixing part; 10, driving part; 11, extending convex rod; 12, driving rod; 13, arc-shaped groove; 14, limiting slide bar; 15, arc-shaped protrusion; 16, driving slide plate; 17, one-way air intake structure; 18, exhaust chamber; 19, driving inclined panel; 20, sliding chamber; 21, exhaust rod; 22, counterweight plate; 23, connecting plate; 24, first supporting plate; 25, second supporting plate; 26, cascading member; 27, negative pressure chamber; 28, suction cup; 29, elastic member; 30, one-way sealing plate; 31, flexible toothed plate; 32, toothed rod. Detailed implementation manners

[0034] Embodiment 1

[0035] As Figure 1 - Figure 2 shown, a circuit board etching device includes an etching base 1 and a conveyor belt 2. The conveyor belt 2 is embedded in the middle of the etching base 1. The side end face of the conveyor belt 2 is fixedly connected to a carrier substrate 4 through a turning mechanism. The flexible circuit board 5 is placed on the surface of the carrier substrate 4 and is etched by spraying during the transportation along with the conveyor belt 2.

[0036] Furthermore, the conveyor belt 2 is arranged on both sides of the inner wall of the etching base 1. Multiple groups of carrier substrates 4 are evenly arranged between the conveyor belts 2. The conveyor belt 2 drives the carrier substrate 4 to transport the flexible circuit board 5, and the carrier substrate 4 can also be used for.

[0037] When in use, the flexible circuit board 5 is placed on the surface of the carrier substrate 4, and the carrier substrate 4 is driven by the conveyor belt 2 to move the flexible circuit board 5 under the spray etching nozzle so that the etching liquid is evenly distributed on the surface of the flexible circuit board 5. A flipping mechanism is also provided so that the carrier substrate 4 can drive the flexible circuit board 5 to flip over during the process of conveying the flexible circuit board 5, thereby completing double-sided etching of the circuit board at one time.

[0038] Embodiment 2

[0039] Based on the first embodiment, Figure 1 - Figure 4 As shown, the flipping mechanism includes a limiting cross bar 3, a positioning ring 6, a telescopic ring 7, a rotating ring 8 and an extending protruding rod 11. The limiting cross bar 3 is fixedly connected to the middle part of the inner wall of the etching base 1, and the limiting cross bar 3 is in contact with the top of the conveyor belt 2. The positioning ring 6 is fixedly connected to the side end surface of the conveyor belt 2, the telescopic ring 7 is elastically connected to the inside of the positioning ring 6, and the rotating ring 8 is fixedly connected to the two ends of the supporting substrate 4. The side end surfaces of the rotating ring 8 are symmetrically provided with extending protruding rods 11, and the end of the extending protruding rod 11 facing away from the rotating ring 8 extends out of the upper end surface of the conveyor belt 2.

[0040] like Figure 1 - Figure 4 As shown, an arcuate groove 13 is symmetrically provided at one end of the telescopic ring 7 away from the positioning ring 6, and an arcuate protrusion 15 adapted to the arcuate groove 13 is provided at the rotating ring 8. A driving rod 12 is provided in the middle of the telescopic ring 7, and the driving rod 12 extends through the middle of the rotating ring 8.

[0041] Furthermore, a limiting slide bar 14 is provided on the side end face of the telescopic ring 7 , a sliding groove matched with the limiting slide bar 14 is provided on the inner wall of the positioning ring 6 , the telescopic ring 7 is embedded in the interior of the positioning ring 6 through a spring, and the telescopic ring 7 is limited in rotation by the limiting slide bar 14 .

[0042] When in use, the flip mechanism is used to flip the carrier substrate 4 so as to realize double-sided etching of the flexible circuit board 5. Specifically, a rotating ring 8 is provided to fix the flexible circuit board 5 inside the carrier substrate 4, and the rotating ring 8 is rotatably sleeved on the outer end surface of the driving rod 12. An extension convex rod 11 is provided on the side end surface of the rotating ring 8. When the carrier substrate 4 is conveyed along with the conveyor belt 2, when the carrier substrate 4 is conveyed to the middle, the extension convex rod 11 abuts against the limiting cross bar 3 in the middle of the inner wall of the etching base 1. Under the action of the limiting cross bar 3 and the extension convex rod 11, the rotating ring 8 is pushed to drive the carrier substrate 4 to rotate, and the extension convex rod 11 is extended. A symmetrically arranged arc groove 13 is provided between the shrinking ring 7 and the rotating ring 8, and the shrinking ring 7 and the rotating ring 8 are elastically fitted together, so that the extending convex rod 11 only needs to drive the rotating ring 8 to rotate a certain angle, and the rotating ring 8 and the shrinking ring 7 can be restored to a fitted state under the action of the arc groove 13, the arc protrusion 15 and the elastic force. At the same time, the arc groove 13 and the arc protrusion 15 are symmetrically arranged, so that each rotation of the supporting substrate 4 can be restored to a horizontal state, that is, each rotation is 180°, thereby ensuring the stability of etching and greatly improving the structural reliability of the flipping mechanism.

[0043] like Figure 1 - Figure 5 and Figure 7 As shown, the supporting substrate 4 includes a fixing portion 9 and a driving portion 10, and the driving portion 10 is symmetrically distributed at both ends of the fixing portion 9. The side of the driving portion 10 facing away from the fixing portion 9 is connected to the rotating ring 8. The fixing portion 9 includes a symmetrically arranged cascade member 26, and the cascade member 26 has a first supporting plate 24 and a second supporting plate 25 that are alternately retracted and slidably connected inside.

[0044] Furthermore, the cross section of the cascade member 26 is a horizontal "U" shape, and the first supporting plate 24 and the second supporting plate 25 are respectively slidably connected to the ends of the "U" shape.

[0045] When in use, in order to avoid blocking the flexible circuit board 5 after the carrier substrate 4 is flipped over, thereby affecting its etching effect, a first supporting plate 24 and a second supporting plate 25 that are alternately retracted and extended are provided inside the fixing portion 9, and the height of the second supporting plate 25 is lower than the first supporting plate 24. When the flexible circuit board 5 is placed, the symmetrically arranged second supporting plates 25 extend out to form a supporting surface, so that the flexible circuit board 5 can be placed on the surface of the second supporting plate 25. When the flipping device drives the carrier substrate 4 to rotate, in order to avoid the flexible circuit board 5 from separating from the carrier substrate 4, the first supporting plate 24 extends out from the inside of the cascade 26, and as the carrier substrate 4 rotates, the second supporting plate 25 is gradually retracted. At this time, the flexible circuit board 5 is placed on the surface of the first supporting plate 24, thereby effectively avoiding the problem of the flexible circuit board 5 falling off when the carrier substrate 4 is flipped over, and can effectively avoid the problem that the traditional clamping flipping requires a larger clamping surface, and the surface of the flexible circuit board 5 will be blocked to a certain extent after flipping.

[0046] As Figure 1 - Figure 5 、 Figure 7 、 Figures 10 - 12 shown, a sliding cavity 20 is formed inside the driving part 10. A driving slide plate 16 is slidably connected inside the sliding cavity 20. The driving slide plate 16 is drivingly connected to the driving rod 12. Driving inclined panels 19 are symmetrically slid on the top and bottom of the sliding cavity 20. The two side edges of the driving slide plate 16 are in contact with the inclined surfaces of the driving inclined panels 19. The driving inclined panels 19 are fixedly connected to the first supporting plate 24 and the second supporting plate 25.

[0047] As Figure 1 - Figure 5 、 Figure 7 、 Figures 10 - 12 shown, the driving slide plate 16 includes a counterweight plate 22 and a connecting plate 23. The counterweight plate 22 is rotatably connected to the end of the driving rod 12 away from the telescopic ring 7. The connecting plate 23 is slidably connected to both sides of the counterweight plate 22. A flexible toothed plate 31 is connected between the same sections of the first supporting plate 24 and the second supporting plate 25. A toothed rod 32 meshing with the flexible toothed plate 31 is provided inside the cascading member 26.

[0048] During use, in order to achieve the alternating expansion and contraction of the first supporting plate 24 and the second supporting plate 25, a driving inclined panel 19 is provided. The driving inclined panel 19 is arranged inside the sliding cavity 20, and the connecting plate 23 is slidably connected to both sides of the counterweight plate 22. The connecting plate 23 is made of high-density metal material and always fits with the driving inclined panel 19 at the bottom of the sliding cavity 20 under the action of gravity. Therefore, when the turning mechanism drives the turning, the expansion ring 7 and the rotating ring 8 will cause the expansion ring 7 to telescopically slide inside the positioning ring 6 under the action of the arc-shaped groove 13 and the arc-shaped protrusion 15. One end of the driving rod 12 away from the expansion ring 7 is rotatably connected to the counterweight plate 22, and thus the counterweight plate 22 can be driven to telescopically slide inside the sliding cavity 20, so that the connecting plate 23 abuts against the driving inclined panel 19. Under the action of the inclined plane, the driving inclined panel 19 will be driven to drive the second supporting plate 25 to move to both sides, and then the second supporting plate 25 will be received into the cascade member 26. At the same time, one end of the same side between the first supporting plate 24 and the second supporting plate 25 is connected with a flexible toothed plate 31, and the flexible toothed plate 31 meshes with a toothed rod 32. Therefore, when the second supporting plate 25 contracts inward, under the action of the flexible toothed plate 31 and the toothed rod 32, the first supporting plate 24 can be extended from the inside of the cascade member 26 to complete the preparation for supporting the flexible circuit board 5. At the same time, the turning mechanism and the expansion and contraction of the first supporting plate 24 and the second supporting plate 25 are carried out simultaneously. When the stroke of the expansion ring 7 reaches the maximum, the bearing substrate 4 can be turned over by at most 90°. At this time, the first supporting plate 24 and the second supporting plate 25 have completed the alternation, so that the flexible circuit board 5 can be effectively supported. Moreover, the synchronous situation of the turning and the expansion and contraction of the first supporting plate 24 can be finely adjusted by setting the radian on both sides of the arc-shaped groove 13. At the same time, the connecting plate 23 is made of metal material and is slidably connected to the counterweight plate 22, so that the connecting plate 23 always fits with the driving inclined panel 19 at the bottom of the sliding cavity 20. After the fixing part 9 is turned over, the connecting plate 23 also moves synchronously under the action of gravity, thus avoiding interference with the top driving inclined panel 19 and affecting the extension of the first supporting plate 24.

[0049] As Figure 1 - Figure 5 、 Figures 7 - 9 and Figures 11 - 12 shown, suction cups 28 are provided on the surfaces of the first supporting plate 24 and the second supporting plate 25. Negative pressure cavities 27 communicating with the suction cups 28 are provided inside the first supporting plate 24 and the second supporting plate 25. An exhaust cavity 18 communicating with the sliding cavity 20 is opened inside the driving part 10. The driving inclined panel 19 is slidably connected inside the exhaust cavity 18. A one-way air intake structure 17 is provided on the inner wall of the exhaust cavity 18, and the exhaust cavity 18 communicates with the negative pressure cavity 27.

[0050] Furthermore, the suction cup 28 can be replaced with a microporous structure, and the first support plate 24 and the second support plate 25 can be set to various shapes such as grids and meshes as needed, so that the driving inclined plate 19 fits the inner wall of the exhaust cavity 18, and the driving inclined plate 19 can form a sealed cavity with the exhaust cavity 18 through a flexible seal.

[0051] When in use, when facing the flexible circuit board, its structure is more fragile. The traditional clamping or flipping mechanism is easy to cause damage to the flexible circuit or insufficient support during the flipping process, resulting in damage to the circuit board. Therefore, a suction cup 28 is provided on the surface of the first supporting plate 24 and the second supporting plate 25. The suction cup 28 is connected to the exhaust chamber 18 through the negative pressure chamber 27. When the first supporting plate 24 and the second supporting plate 25 are extended and retracted, when the second supporting plate 25 is retracted into the cascade 26, the inclined plate 19 is driven to move into the exhaust chamber 18, thereby compressing the internal volume of the exhaust chamber 18 to increase the pressure in the exhaust chamber 18. Thereby, the medium in the suction cup 28 is ejected to separate the flexible circuit board 5 from the second supporting plate 25, avoiding adhesion caused by the tension of the etching liquid. When the first supporting plate 24 is extended from the cascade part 26, the exhaust cavity 18 is connected to a one-way air intake structure 17 that only allows air to enter but not exit. As the cascade part 26 is extended, the inclined plate 19 is driven to move outward from the exhaust cavity 18, thereby generating negative pressure in the exhaust cavity 18. When the flexible circuit board 5 is placed on the surface of the first supporting plate 24, the flexible circuit board 5 can be fixed on the surface of the first supporting plate 24 under the action of negative pressure and avoid movement during transportation, etching and turning over.

[0052] like Figure 1 - Figure 5 and Figures 9 - 12 As shown, the one-way air intake structure 17 includes a suction cup 28 and a one-way sealing plate 30. The suction cup 28 is connected to the exhaust chamber 18 and extends through to the outer end surface of the driving portion 10. The end of the suction cup 28 facing away from the exhaust chamber 18 is elastically fitted with the one-way sealing plate 30 through an elastic member 29. The cross-section of the one-way sealing plate 30 is trapezoidal, and the side with a smaller contact surface of the one-way sealing plate 30 is fitted with the end of the suction cup 28. The side of the driving inclined plate 19 that fits the exhaust chamber 18 is provided with an exhaust rod 21 that is compatible with the suction cup 28.

[0053] When in use, the one-way air intake structure 17 is used to achieve the medium in the exhaust chamber 18 to only go out but not in. The one-way air intake structure 17 is provided with a one-way sealing plate 30. The one-way sealing plate 30 can be in the shape of a cone and fits with the suction cup 28 under the elastic force of the elastic member 29, so that the gas in the exhaust chamber 18 can overflow through the one-way sealing plate 30 and is difficult to enter through the limiting cross bar 3, thereby achieving a one-way conduction effect. In order to avoid excessive negative pressure in the exhaust chamber 18 that makes it difficult to separate the flexible circuit board 5, an exhaust rod 21 is provided. When the inclined plate 19 is driven to retract into the exhaust chamber 18, the exhaust rod 21 will extend into the suction cup 28 and abut against the one-way sealing plate 30 to separate the one-way sealing plate 30 from the suction cup 28, so that the air pressure in the exhaust chamber 18 is restored.

[0054] Working principle: By placing the flexible circuit board 5 on the surface of the carrier substrate 4, the carrier substrate 4 drives the flexible circuit board 5 to move under the spraying and etching nozzle through the conveyor belt 2, so that the etching solution is evenly distributed on the surface of the flexible circuit board 5. There is also a turning mechanism that enables the carrier substrate 4 to drive the flexible circuit board 5 to turn over during the process of conveying the flexible circuit board 5, so as to complete the double-sided etching of the circuit board at one time. The carrier substrate 4 is turned over through the turning mechanism to achieve double-sided etching of the flexible circuit board 5. Specifically, a rotating ring 8 is provided, and the flexible circuit board 5 is fixed inside the carrier substrate 4, and the rotating ring 8 is rotatably sleeved on the outer end face of the driving rod 12. An extending convex rod 11 is provided on the side end face of the rotating ring 8. When the carrier substrate 4 is conveyed by the conveyor belt 2 and reaches the middle, the extending convex rod 11 abuts against the limiting cross bar 3 in the middle of the inner wall of the etching base 1. Under the action of the limiting cross bar 3 and the extending convex rod 11, the rotating ring 8 is pushed to drive the rotation of the carrier substrate 4. There are symmetrically arranged arc-shaped grooves 13 between the telescopic ring 7 and the rotating ring 8, and at the same time, the telescopic ring 7 and the rotating ring 8 are elastically attached. Furthermore, after the extending convex rod 11 only drives the rotating ring 8 to rotate a certain angle, under the action of the arc-shaped groove 13, the arc-shaped protrusion 15 and the elastic force, the rotating ring 8 and the telescopic ring 7 can be restored to the attached state again. At the same time, the arc-shaped groove 13 and the arc-shaped protrusion 15 are symmetrically arranged, so that each rotation of the carrier substrate 4 can be restored to the horizontal state, that is, each rotation is 180°, thus ensuring the stability of etching and greatly improving the structural reliability of the turning mechanism. To avoid the shielding of the flexible circuit board 5 caused by the turning of the carrier substrate 4 and affect its etching effect, a first supporting plate 24 and a second supporting plate 25 that alternately expand and contract are provided inside the fixing part 9. The height of the second supporting plate 25 is lower than that of the first supporting plate 24. When the flexible circuit board 5 is placed, the symmetrically arranged second supporting plates 25 extend out to form a supporting surface, and the flexible circuit board 5 can be placed on the surface of the second supporting plate 25. When the turning device drives the carrier substrate 4 to rotate, to prevent the flexible circuit board 5 from separating from the carrier substrate 4, the first supporting plate 24 extends out from the inside of the cascading part 26, and as the carrier substrate 4 rotates, the second supporting plate 25 gradually retracts. At this time, the flexible circuit board 5 is placed on the surface of the first supporting plate 24, effectively avoiding the problem of the flexible circuit board 5 falling off when the carrier substrate 4 is turned over, and at the same time effectively avoiding the problem that the traditional clamping and turning over requires a large clamping surface and there will be a certain shielding on the surface of the flexible circuit board 5 after turning over. To realize the alternate expansion and contraction of the first supporting plate 24 and the second supporting plate 25, a driving inclined plate 19 is provided. The driving inclined plate 19 is arranged inside the sliding cavity 20, and the connecting plate 23 is slidably connected to both sides of the counterweight plate 22. The connecting plate 23 is made of a high-density metal material and always fits with the driving inclined plate 19 at the bottom of the sliding cavity 20 under the action of gravity. Furthermore, when the turning mechanism drives the turning, the telescopic ring 7 and the rotating ring 8 will cause the telescopic ring 7 to slide telescopically inside the positioning ring 6 under the action of the arc-shaped groove 13 and the arc-shaped protrusion 15,The end of the driving rod 12 away from the telescopic ring 7 is rotatably connected to the counterweight plate 22, and then the counterweight plate 22 can be driven to telescope and slide inside the sliding cavity 20 so that the connecting plate 23 is in contact with the driving inclined plate 19. Under the action of the inclined surface, the driving inclined plate 19 drives the second supporting plate 25 to move to both sides, and then the second supporting plate 25 is received into the cascade 26. At the same time, a flexible tooth plate 31 is connected to one end on the same side between the first supporting plate 24 and the second supporting plate 25, and the flexible tooth plate 31 is meshed with a tooth rod 32. Then, when the second supporting plate 25 contracts inwardly, the first supporting plate 24 can be extended from the inside of the cascade 26 under the action of the flexible tooth plate 31 and the tooth rod 32, completing the support preparation for the flexible circuit board 5. At the same time, the flipping mechanism and the first supporting plate The first supporting plate 24 and the second supporting plate 25 are extended and retracted simultaneously. When the travel of the retractable ring 7 reaches the maximum, the supporting substrate 4 is flipped by a maximum of 90°. At this time, the first supporting plate 24 and the second supporting plate 25 have completed the alternation, so that the flexible circuit board 5 can be effectively supported. The arcs on both sides of the arc groove 13 can also be fine-tuned to control the synchronization of the flipping and the extension and retraction of the first supporting plate 24. At the same time, the connecting plate 23 is made of metal and is slidably connected to the counterweight plate 22, so that the connecting plate 23 is always in contact with the driving inclined plate 19 at the bottom of the sliding cavity 20. After the fixing part 9 is flipped, the connecting plate 23 also moves synchronously under the action of gravity, thereby avoiding interference with the top driving inclined plate 19 and avoiding affecting the extension of the first supporting plate 24. When facing the flexible circuit board, its structure is more The conventional clamping or flipping mechanism is prone to damage to the flexible circuit or damage to the circuit board due to insufficient support during the flipping process. A suction cup 28 is provided on the surface of the first supporting plate 24 and the second supporting plate 25. The suction cup 28 is connected to the exhaust chamber 18 through the negative pressure chamber 27. When the first supporting plate 24 and the second supporting plate 25 are retracted and extended, when the second supporting plate 25 is received in the cascade 26, the inclined plate 19 is driven to move into the exhaust chamber 18, thereby compressing the volume of the exhaust chamber 18 so that the pressure in the exhaust chamber 18 increases, so that the medium in the suction cup 28 is ejected to separate the flexible circuit board 5 from the second supporting plate 25, thereby avoiding adhesion caused by the tension of the etching liquid. When the first supporting plate 24 is extended from the cascade 26, the exhaust chamber 1 8 is connected with a one-way air intake structure 17 that only allows air to enter but not exit. As the cascade member 26 extends, the inclined plate 19 is driven to move outward from the exhaust chamber 18, thereby generating a negative pressure in the exhaust chamber 18. When the flexible circuit board 5 is placed on the surface of the first supporting plate 24, the flexible circuit board 5 can be fixed on the surface of the first supporting plate 24 under the action of the negative pressure and prevented from moving during transportation, etching and flipping. The one-way air intake structure 17 allows the medium in the exhaust chamber 18 to only exit but not enter. The one-way air intake structure 17 is provided with a one-way sealing plate 30. The one-way sealing plate 30 can be in the shape of a cone or the like and fits with the suction cup 28 under the elastic force of the elastic member 29, so that the gas in the exhaust chamber 18 can overflow through the one-way sealing plate 30 and is difficult to enter through the limiting cross bar 3, thereby achieving a one-way conduction effect.Moreover, to prevent the excessive negative pressure in the exhaust cavity 18 from making it difficult to separate the flexible circuit board 5, an exhaust rod 21 is provided. When the driving inclined panel 19 is retracted into the interior of the exhaust cavity 18, the exhaust rod 21 will extend into the interior of the suction cup 28 and abut against the one-way sealing plate 30, causing the one-way sealing plate 30 to separate from the suction cup 28, so that the air pressure in the exhaust cavity 18 is restored.

Claims

1. A circuit board etching device, comprising an etching base and a conveyor belt, characterized in that: The conveyor belt is embedded in the middle of the etching base, and the side end surface of the conveyor belt is connected to the carrier substrate through a flipping mechanism. The flexible circuit board is placed on the surface of the carrier substrate and is sprayed and etched during the conveying process of the conveyor belt; The turning mechanism comprises a limit cross bar, a positioning ring, a telescopic ring, a rotating ring and an extended convex rod, wherein the limit cross bar is fixedly connected to the middle part of the inner wall of the etching base, and the limit cross bar is in contact with the top of the conveyor belt, the positioning ring is fixedly connected to the side end surface of the conveyor belt, the telescopic ring is elastically connected to the inside of the positioning ring, the rotating ring is fixedly connected to the two ends of the supporting substrate, and the side end surfaces of the rotating ring are symmetrically provided with extended convex rods on both sides, and the end of the extended convex rod facing away from the rotating ring extends out of the upper end surface of the conveyor belt; The telescopic ring is symmetrically provided with an arc-shaped groove at one end away from the positioning ring, the rotating ring is provided with an arc-shaped protrusion adapted to the arc-shaped groove, and a driving rod is provided in the middle of the telescopic ring, and the driving rod extends through the middle of the rotating ring; The supporting substrate includes a fixed part and a driving part, the driving part is symmetrically distributed at both ends of the fixed part, the driving part is connected to the rotating ring on the side away from the fixed part, the fixed part includes a symmetrically arranged cascade part, and the cascade part is internally slidably connected with a first supporting plate and a second supporting plate that are alternately telescopic.

2. A circuit board etching device according to claim 1, characterized in that: A sliding cavity is provided inside the driving part, and a driving slide is slidably connected inside the sliding cavity. The driving slide is drivingly connected to the driving rod. Driving inclined panels are symmetrically slidably provided at the top and bottom of the sliding cavity. The two side edges of the driving slide are in contact with the inclined surfaces of the driving inclined panels, and the driving inclined panels are fixedly connected to the first supporting plate and the second supporting plate.

3. A circuit board etching device according to claim 2, characterized in that: The driving skateboard includes a counterweight plate and a connecting plate. The counterweight plate is rotatably connected to the end of the driving rod away from the telescopic ring. The connecting plate is slidably connected to both sides of the counterweight plate. The first supporting plate and the second supporting plate are connected at the same section through a flexible tooth plate. A tooth rod meshing with the flexible tooth plate is provided inside the cascade component.

4. A circuit board etching device according to claim 2, characterized in that: Suction cups are provided on the surfaces of the first supporting plate and the second supporting plate, and negative pressure chambers connected to the suction cups are provided inside the first supporting plate and the second supporting plate, an exhaust chamber connected to the sliding chamber is provided inside the driving part, the driving inclined plate is slidably connected inside the exhaust chamber, a one-way air intake structure is provided on the inner wall of the exhaust chamber, and the exhaust chamber is connected to the negative pressure chamber.

5. A circuit board etching device according to claim 4, characterized in that: The one-way air intake structure includes a suction cup and a one-way sealing plate. The suction cup is connected to the exhaust chamber and extends through it to the outer end surface of the driving part. The end of the suction cup facing away from the exhaust chamber is elastically fitted with a one-way sealing plate through an elastic member. The cross-section of the one-way sealing plate is trapezoidal. The side with a smaller contact surface of the one-way sealing plate is fitted with the end of the suction cup. The side of the driving inclined plate that is fitted with the exhaust chamber is provided with an exhaust rod that is compatible with the suction cup.

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