A tilt hanger for PCB boss gold sinking production

Abstract

This invention belongs to the field of circuit board manufacturing technology and relates to an inclined mounting fixture for PCB boss immersion gold production. It includes: a frame; two symmetrically distributed overlapping brackets fixed to the upper side of the frame; two sets of symmetrically distributed sliding rods fixed to the frame; two sliding rods in the same set sharing two symmetrically distributed connecting plates; elastic elements sleeved on the sliding rods; and equidistantly distributed sliding rings slidably connected to the sliding rods. Two corresponding sliding rings on different sliding rods in the same set are jointly engaged with support strips. This invention adjusts the pitch of the elastic element after deformation by changing its shape, and moves the sliding rings and support strips together during the deformation of the elastic element. By changing the shape of the elastic element, the position of all connected support strips can be adjusted, thus adapting the spacing between adjacent support strips to the PCB specifications, thereby improving the efficiency of the immersion gold process while ensuring the immersion gold effect.

Description

Technical Field

[0001] This invention relates to the field of circuit board manufacturing technology, and in particular to an inclined mounting fixture for immersion gold production of PCB bosses. Background Technology

[0002] Immersion gold plating is a chemical deposition process that uses a chemical oxidation-reduction reaction to create a metallic coating on the surface of a circuit board. PCB bosses refer to PCBs with copper heat dissipation bosses on their surface. During the immersion gold process on PCB bosses, the PCB is placed in a basket, which is then lifted by a machine and sequentially placed into various chemical tanks. The chemical solutions in the tanks immerse the PCB, allowing the surface to fully react with the solutions. Since immersion gold plating is electroless, relying entirely on the flow of the chemical solutions to remove reaction byproducts and replenish fresh metal ions and reducing agents, the exchange efficiency of the chemical solutions on the PCB surface directly affects the immersion gold plating rate and effect. If the spacing between adjacent PCBs is too small, the chemical exchange rate in the center of the PCB will be significantly lower than that at the edges. Excessive differences in the exchange rate and concentration of the chemical solution lead to significant variations in the uniformity of the metal plating thickness between the edges and center of the PCB board. Therefore, before the immersion gold process, the spacing between adjacent PCB boards is determined based on factors such as the PCB board thickness and size, and the specifications of the hanging basket are selected. For hanging baskets used with flexible PCB boards, multiple taut Teflon ropes are typically used to separate adjacent PCB boards to ensure that each board is suspended vertically and with a stable spacing, preventing the PCB boards from shaking and sticking together during the flow of the chemical solution. Due to the diverse specifications of flexible PCB boards, the spacing between adjacent PCB boards in the immersion gold process is usually greater than the optimal spacing. While this ensures the immersion gold effect of the flexible PCB board, it reduces the number of boards processed per immersion gold process, thus reducing production efficiency. Summary of the Invention

[0003] This invention provides an inclined hanger for PCB boss immersion gold production, overcoming the shortcomings of existing hanging baskets used in flexible PCBs, which suffer from low production efficiency due to fixed spacing.

[0004] The technical solution is as follows: A tilting fixture for PCB boss immersion gold production includes: a frame, two symmetrically distributed overlapping brackets fixed to the upper side of the frame, two sets of symmetrically distributed sliding rods fixed to the frame, each set of sliding rods consisting of two symmetrically distributed rods, the two sliding rods in the same set sharing two symmetrically distributed connecting plates, an elastic element sleeved on the sliding rod, the elastic element located between and fixedly connected to the corresponding two connecting plates, equidistantly distributed slip rings slidably connected to the sliding rod, all slip rings on the same sliding rod being located between the corresponding two connecting plates, two corresponding slip rings on different sliding rods in the same set of sliding rods sharing a support strip, the support strip having limit grooves near the corresponding two slip rings, the elastic element passing through all corresponding limit grooves on the same sliding rod, the elastic element driving the support strip to move, and equidistantly distributed guide ropes between the corresponding two support strips in the two sets of sliding rods.

[0005] Furthermore, the connecting plate is threaded with two symmetrically distributed threaded rods. A limit block is hinged to the side of the threaded rod near the corresponding support bar. Limit holes are provided on the support bar near the two corresponding threaded rods. The limit holes are coaxial with the corresponding threaded rods. The limit blocks are used to limit the corresponding support bars.

[0006] Furthermore, the limiting block is provided with symmetrically distributed guide slopes, which are used to guide the limiting block through the corresponding limiting hole.

[0007] Furthermore, the connecting plate and the two corresponding sliding rods are slidably connected, and the elastic element is a tension spring.

[0008] Furthermore, guide blocks are fixedly connected to the frame near the middle of the four connecting plates, and the guide blocks are provided with guide holes. An electric push rod is installed on the overlapping frame, and the overlapping frame is provided with two positioning holes. A pull rope is fixedly connected to the middle of the connecting plate, and the pull rope passes through the corresponding guide hole and the corresponding positioning hole. The electric push rod is used to control the corresponding two pull ropes.

[0009] Furthermore, the edges of both the guide hole and the positioning hole are provided with arc-shaped annular surfaces to facilitate the sliding of the pull rope along the corresponding guide hole and the corresponding positioning hole.

[0010] Furthermore, the telescopic end of the electric push rod is slidably connected to a main U-shaped component, and there is friction between the main U-shaped component and the telescopic end of the corresponding electric push rod. The overlapping frame is provided with a friction groove near the position of the corresponding main U-shaped component, and a friction block is slidably limited in the friction groove. The friction block is fixedly connected to a secondary U-shaped component. The electric push rod is used to drive the corresponding secondary U-shaped component to move. The main U-shaped component and the secondary U-shaped component are respectively fixedly connected to two pull ropes on the same side.

[0011] Furthermore, the guide rope is made of an elastic material, and the elastic coefficient of the elastic element is greater than that of the guide rope.

[0012] Furthermore, both ends of the guide rope are fixed with protruding balls, and the support bar is provided with a slot near the position corresponding to the guide rope. The support bar limits the corresponding protruding balls through the slot.

[0013] Furthermore, all the guide ropes corresponding to the same support bar are jointly fixed with equally spaced connecting rods, which are used to provide support for the PCB.

[0014] The present invention discloses the following technical effects: By changing the shape of the elastic element and adjusting the pitch size after the elastic element is deformed, and by driving the slip ring and support strip to move together during the deformation of the elastic element, the position of all the support strips connected to it can be adjusted by changing the shape of the elastic element. In this way, the spacing between two adjacent support strips can be adapted to the specifications of the PCB board, thereby improving the work efficiency of the immersion gold process while ensuring the immersion gold effect.

[0015] By using a threaded rod to pass through the limiting hole and limit the support bar through the limiting block, the support bars that have passed through are stacked and gathered at the end of the slide bar. In this way, without changing the overall volume of the frame, an adjustment range can be provided for the spacing of the remaining unlimited support bars.

[0016] By controlling the position of the connecting plate with an electric push rod, the spacing between two adjacent support bars can be adjusted during the immersion gold process. This changes the spacing between two adjacent PCB boards. On the one hand, the movement of the PCB boards forces the liquid medicine located in the middle of the two adjacent PCB boards to be squeezed out, and promotes the entry of new liquid medicine between the two adjacent PCB boards, improving the contact efficiency between the liquid medicine and the middle of the PCB board. On the other hand, for flexible PCB boards, controlling the movement of the support bars can change the contact state between the flexible PCB board and the guide rope, avoiding long-term contact between the flexible PCB board and the local guide rope, which would affect the contact between the liquid medicine and the PCB board.

[0017] The main U-shaped component and the auxiliary U-shaped component control the movement sequence of the upper and lower connecting plates, so that the lower connecting plate moves before the upper connecting plate. This causes the lower sides of two adjacent PCB boards to move closer together first, followed by the upper sides. This squeezes the liquid between the two adjacent PCB boards upwards. Then, the lower sides of the PCB boards are controlled to separate first, followed by the upper sides. This draws the liquid under the PCB boards into the space between the two adjacent PCB boards, increasing the concentration of the liquid entering the space between the two adjacent PCB boards, thereby improving the gold plating efficiency. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the frame and lap joint of the present invention; Figure 3 This is a three-dimensional structural diagram of the slide bar and connecting plate of the present invention; Figure 4 Appendix to this invention Figure 3 Enlarged view of point A in the middle; Figure 5 This is a three-dimensional structural diagram of the connecting plate and support strip of the present invention; Figure 6 Appendix to this invention Figure 3 Enlarged view of point B in the middle; Figure 7 This is a three-dimensional structural diagram of the main U-shaped component and the auxiliary U-shaped component of the present invention; Figure 8 This is a three-dimensional structural diagram of the secondary U-shaped component and the friction block of the present invention; Figure 9 This is a three-dimensional structural diagram of the guide rope and connecting rod of the present invention.

[0019] Reference numerals: 1-Frame, 2-Overlapping frame, 3-Slide rod, 4-Connecting plate, 5-Elastic element, 6-Slip ring, 7-Support bar, 701-Limiting groove, 8-Threaded rod, 801-Limiting hole, 9-Limiting block, 901-Guiding inclined surface, 10-Guiding rope, 11-Guiding block, 111-Guiding hole, 12-Electric push rod, 121-Positioning hole, 13-Pull rope, 14-Main U-shaped component, 15-Secondary U-shaped component, 16-Friction block, 161-Friction groove, 17-Convex ball, 171-Slot, 18-Connecting rod. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0021] Example 1: This example provides an inclined hanger for PCB boss immersion gold production, which solves the problem of low production efficiency caused by the fixed spacing of existing hanging baskets used in flexible PCB boards.

[0022] See Figures 1 to 5 A tilting fixture for PCB boss immersion gold production includes: a frame 1, with equidistant reinforcing strips on the front, back, left, right, and bottom sides of the frame 1. These reinforcing strips restrict the position of the PCB board on the front, back, left, right, and bottom sides, preventing the PCB board from slipping out of the frame 1; two symmetrically distributed overlapping brackets 2 are fixed to the upper side of the frame 1. The overlapping brackets 2, used to connect to the overhead crane, are tilted forward relative to the frame 1, so that during the immersion gold process, the lower right corner of the PCB board (see attached image) is tilted forward. Figure 2 (Described based on the front view perspective) The lowest point is designed so that after the PCB board is removed from the solution, any remaining solution on the PCB board surface can collect at its lowest corner, accelerating the dripping of the solution off the PCB board surface. Two sets of slide rods 3 are fixedly connected to the frame 1, symmetrically distributed vertically. Each set of slide rods 3 consists of two symmetrically distributed front-to-back slide rods. The two slide rods 3 in the same set are connected to two symmetrically distributed connecting plates 4. Elastic elements 5 are sleeved on the slide rods 3. In this embodiment, the elastic element 5 can be an equal-pitch tension spring or an equal-pitch spring. The elastic element 5 is located between and fixedly connected to the corresponding two connecting plates 4. Equally spaced slip rings 6 are slidably connected to the slide rods 3. The number of slip rings 6 corresponding to one slide rod 3 is equal to the effective number of turns of the elastic element 5. All the slip rings 6 on the same slide rod 3 are located between the corresponding two connecting plates 4. The two corresponding slip rings 6 on different slide rods 3 in the same group of slide rods 3 are jointly engaged with the support bar 7. The support bar 7 is made of elastic metal. Both the front and rear ends of the support bar 7 are provided with grooves that match the shape of the slip ring 6, which are used to lock onto the outer periphery of the slip ring 6. The support bar 7 is provided with a limiting groove 701 near the corresponding two slip rings 6. The elastic element 5 passes through all the corresponding limiting grooves 701 on the same slide rod 3, and one effective number of turns of the elastic element 5 corresponds to one limiting groove 701. In this way, the distance between two adjacent limiting grooves 701 is approximately the pitch of the elastic element 5 after deformation. Six guide ropes 10 are equally distributed between the two vertically corresponding support bars 7 in the two groups of slide rods 3.

[0023] The above setup enables the adjustment of the pitch size of the elastic element 5 after deformation by changing its shape, and the movement of the slip ring 6 and support bar 7 together during the deformation of the elastic element 5. By changing the shape of the elastic element 5, the position of all the support bars 7 connected to it can be adjusted, so that the spacing between two adjacent support bars 7 can be adapted to the specifications of the PCB board, thereby improving the efficiency of the immersion gold process while ensuring the immersion gold effect.

[0024] It should be noted that, in this embodiment, the connection between the connecting plate 4 and the corresponding sliding rod 3 can be considered as a fixed connection; the two corresponding upper and lower support bars 7, the four slip rings 6 that are engaged with the two support bars 7, and the six guide ropes 10 located between the two support bars 7 are collectively referred to as a dividing unit, and the appendix of this application... Figure 1 In order to prevent the images from being too compact and to better illustrate the relative positions of the dividing units and other parts, additional images are included in the appendix. Figure 1 Some of the dividing units are omitted, but in actual operation, one dividing unit corresponds to one effective number of turns on the elastic element 5.

[0025] See Figures 3 to 5 On the left side, two connecting plates 4 are each threaded with two threaded rods 8 symmetrically distributed front and back. The right end of the threaded rod 8 is hinged to a limiting block 9. There is friction between the limiting block 9 and the corresponding threaded rod 8, so that the relative position of the threaded rod 8 and the limiting block 9 can remain stable without external force. The hinge position between the threaded rod 8 and the limiting block 9 is located in the middle of the limiting block 9. The length of the limiting block 9 is greater than the diameter of the threaded rod 8. The support bar 7 is provided with two limiting holes 801 symmetrically distributed front and back. The limiting holes 801 are coaxial with the corresponding threaded rod 8. The limiting block 9 is used to limit the corresponding support bar 7.

[0026] The above setup enables the threaded rod 8 to pass through the limiting hole 801 and limit the support bar 7 through the limiting block 9. Then, the threaded rod 8 is used to stack and gather the support bars 7 that it passes through at the end of the slide bar 3. In this way, without changing the overall volume of the frame 1, an adjustment range can be provided for the spacing of the remaining unlimited support bars 7.

[0027] See Figure 4 The limiting block 9 is provided with two sets of guide slopes 901 that are symmetrically distributed from left to right. Each set of guide slopes 901 consists of two that are symmetrically distributed from top to bottom. The guide slopes 901 are used to guide the limiting block 9 through the corresponding limiting hole 801.

[0028] The process for adjusting the spacing between two adjacent support bars 7 is as follows: Determine the optimal spacing between two adjacent support bars 7 according to the specifications of the PCB board. Then, determine the number of support bars 7 that need to be gathered together according to the length of the frame 1 in the left and right directions. Use a tool to rotate the threaded rod 8 so that the threaded rod 8 drives the limiting block 9 to move to the right. Stop when the threaded rod 8 moves to the right limit position. Then move the support bars 7 that need to be gathered together to the left so that the limiting block 9 and the threaded rod 8 pass through the corresponding limiting hole 801. At the same time, the support bars 7 drive the slip ring 6 to move together. The support bars 7 drive the left side of the corresponding elastic element 5 to shrink and deform through the limiting groove 701.

[0029] After the limiting block 9 passes through the limiting hole 801 on the support bar 7 that needs to be gathered, rotate the limiting block 9 9 90° to limit all the support bars 7 that it has passed through. Then, use a tool to rotate the threaded rod 8 in the opposite direction. The threaded rod 8 drives the limiting block 9 to move to the left together. The limiting block 9 drives all the support bars 7 that it has passed through to gather to the left together until the spacing of the remaining support bars 7 reaches the optimal spacing. Then stop rotating the threaded rod 8. The spacing adjustment is now complete. Place the PCB board between two adjacent support bars 7 one by one from top to bottom.

[0030] Example 2: This example is a further optimization based on Example 1.

[0031] See Figure 3 and Figure 4 The connecting plate 4 and the two corresponding sliding rods 3 are slidably connected, so that the position of the connecting plate 4 can be changed, and the position of the support bar 7 can be changed during the immersion gold process. The elastic element 5 is a tension spring with equal pitch, and in the state shown in the attached figure, the elastic element 5 is in a tensioned and stored state.

[0032] See Figure 2 , Figure 3 , Figure 6 and Figure 7 Guide blocks 11 are fixedly connected to the frame 1 near the middle of the four connecting plates 4. The middle of the guide block 11 is provided with a guide hole 111. The midpoint of the connecting plate 4 is located on the axis of the corresponding guide hole 111. An electric push rod 12 is installed on the overlapping frame 2. The electric push rod 12 is a remote-controlled version with a battery. The lower part of the overlapping frame 2 is provided with two positioning holes 121. A pull rope 13 is fixedly connected to the middle of the connecting plate 4. The pull rope 13 passes through the corresponding guide hole 111 and an adjacent positioning hole 121 on the same side. The electric push rod 12 is used to control the two corresponding pull ropes 13.

[0033] The above setup enables the position of the connecting plate 4 to be controlled by the electric push rod 12. During the immersion gold process, the position of the connecting plate 4 can be changed, thereby adjusting the spacing between two adjacent support bars 7. This changes the spacing between two adjacent PCB boards. On the one hand, the movement of the PCB boards squeezes out the liquid medicine located in the middle of the two adjacent PCB boards and promotes the entry of new liquid medicine between the two adjacent PCB boards, improving the contact efficiency between the liquid medicine and the middle of the PCB board. On the other hand, for flexible PCB boards, by controlling the movement of the support bars 7, the contact state between the flexible PCB board and the guide rope 10 can be changed, avoiding long-term contact between the flexible PCB board and the local guide rope 10, which would affect the contact between the liquid medicine and the PCB board.

[0034] See Figure 6 The edges of the guide hole 111 and the positioning hole 121 are provided with arc-shaped annular surfaces to control the bending amplitude of the pull rope 13 at the bend, so that the pull rope 13 can slide along the corresponding guide hole 111 and the corresponding positioning hole 121.

[0035] The process of moving the flexible PCB board during immersion gold treatment: After the frame 1 is fully immersed in the solution, the frame 1 remains stationary. Then, the electric push rods 12 on the left and right sides are started and stopped in sequence. For example, when the electric push rod 12 on the right is started, the telescopic end of the electric push rod 12 extends, which loosens the two pull ropes 13 on the right. The two connecting plates 4 on the right move to the left under the pulling force of the four elastic elements 5, which reduces the distance between the two adjacent PCB boards and squeezes out the solution between the two adjacent PCB boards.

[0036] After the telescopic end of the electric push rod 12 on the right is extended to its limit, the telescopic end of the electric push rod 12 on the right is retracted. The pull rope 13 pulls the two connecting plates 4 on the right to move to the right. The two connecting plates 4 simultaneously stretch the four elastic elements 5, so that the pitch of the elastic elements 5 gradually increases. The elastic elements 5 drive the slip ring 6 and the support bar 7 to move to the right together through the limiting groove 701. During this process, the PCB board is pushed to the right by the guide rope 10 on the left side of the PCB board, which increases the distance between the two adjacent PCB boards, allowing the liquid medicine to enter between the two adjacent PCB boards. After the connecting plate 4 is reset, the electric push rod 12 on the right is stopped. During this process, since the movement is driven by the guide rope 10 on the left side of the PCB board, the reaction between the PCB board and the liquid medicine is mainly blocked by the guide rope 10 on its left side.

[0037] After the solution reacts with the PCB board for a period of time (the duration of this time depends on the total reaction time required for the PCB board in the solution), the electric push rod 12 on the left is activated, and the above steps are repeated. Finally, the guide rope 10 on the right side of the PCB board comes into contact with it. After that, the PCB board is mainly blocked by the guide rope 10 on its right side when reacting with the solution. In this way, by changing the position of the PCB board, the solution is promoted to react with the PCB board, and the position of the guide rope 10 blocking the PCB board is changed, thereby improving the gold plating effect of the PCB board.

[0038] Example 3: This example is a further optimization based on Example 2.

[0039] See Figure 2 , Figure 7 and Figure 8The telescopic end of the electric push rod 12 is slidably connected to a main U-shaped component 14. The overlapping frame 2 has a protruding ridge near the positioning hole 121 to limit the extreme position of the corresponding main U-shaped component 14. There is friction between the main U-shaped component 14 and the telescopic end of the corresponding electric push rod 12. The overlapping frame 2 has a friction groove 161 near the corresponding main U-shaped component 14. A friction block 16 is slidably limited within the friction groove 161, and a secondary U-shaped component 15 is fixedly connected to the friction block 16. The electric push rod 12 is used to drive the corresponding secondary U-shaped component 15 to move. The main U-shaped component 14 and the auxiliary U-shaped component 15 are respectively fixed to two corresponding pull ropes 13 on the same side. The main U-shaped component 14 is connected to the corresponding connecting plate 4 on the lower side through the pull rope 13, and the auxiliary U-shaped component 15 is connected to the corresponding connecting plate 4 on the upper side through the pull rope 13. The friction between the main U-shaped component 14 and the telescopic end of the corresponding electric push rod 12, as well as the friction between the friction block 16 and the friction groove 161, are both greater than the elastic force of the elastic component 5. The guide rope 10 is made of elastic material, and the elastic coefficient of the elastic component 5 is greater than the elastic coefficient of the guide rope 10.

[0040] The above setup enables the main U-shaped component 14 and the auxiliary U-shaped component 15 to control the movement sequence of the upper and lower connecting plates 4, so that the lower connecting plate 4 moves before the upper connecting plate 4, thereby causing the lower sides of the two adjacent PCB boards to move closer together first, followed by the upper sides. This squeezes the liquid between the two adjacent PCB boards upwards, and then controls the lower side of the PCB boards to separate first, followed by the upper side. This draws the liquid below the PCB boards into the space between the two adjacent PCB boards, increasing the concentration of the liquid entering the space between the two adjacent PCB boards, thereby improving the gold plating efficiency.

[0041] PCB board movement process: Repeat the steps in Example 2. After the electric push rod 12 on the right is started, the telescopic end of the electric push rod 12 on the right extends. The telescopic end of the electric push rod 12 drives the main U-shaped part 14 to move through friction. At this time, the auxiliary U-shaped part 15 remains stationary under the action of friction between the friction block 16 and the friction groove 161. During the movement, the main U-shaped part 14 gradually releases the corresponding pull rope 13, so that the connecting plate 4 at the lower right side moves to the left under the pulling force of the two elastic parts 5 on the lower side, thereby causing the lower part of the PCB board to gradually move closer together.

[0042] When the lower part of the main U-shaped component 14 moves to the positioning hole 121, the main U-shaped component 14 stops moving. At this time, the telescopic end of the electric push rod 12 abuts against the lower part of the auxiliary U-shaped component 15. As the telescopic end of the electric push rod 12 extends, the main U-shaped component 14 and the telescopic end of the electric push rod 12 slide relative to each other. The telescopic end of the electric push rod 12 directly squeezes the lower part of the auxiliary U-shaped component 15, causing the auxiliary U-shaped component 15 to start moving downward. The auxiliary U-shaped component 15 drives the friction block 16 to slide along the friction groove 161. During the movement, the auxiliary U-shaped component 15 gradually releases the pull rope 13, causing the connecting plate 4 on the upper right side to gradually move to the left under the action of the two elastic members 5 on the upper side. The upper part of the PCB board gradually moves closer together, thus squeezing the liquid between the two adjacent PCB boards to the top of the PCB board.

[0043] When the lower part of the secondary U-shaped component 15 moves to the positioning hole 121, the secondary U-shaped component 15 stops moving. At this time, the telescopic end of the electric push rod 12 begins to retract. The telescopic end of the electric push rod 12 first drives the main U-shaped component 14 to move upward by friction, so that the lower part of the PCB board gradually opens, causing the liquid medicine under the PCB board to enter between the two adjacent PCB boards. After the connecting plate 4 on the lower side is reset, the connecting plate 4 contacts the frame 1, so that the connecting plate 4 reaches the limit position, and the main U-shaped component 14 stops moving. As the telescopic end of the electric push rod 12 continues to retract, the main U-shaped component 14 slides with the telescopic end of the electric push rod 12. The telescopic end of the electric push rod 12 squeezes the upper part of the secondary U-shaped component 15 and drives the secondary U-shaped component 15 to move upward, so that the upper part of the PCB board gradually opens until the connecting plate 4 is reset.

[0044] Example 4: This example is a further optimization based on Example 3.

[0045] See Figure 5 and Figure 9 Both ends of the guide rope 10 are fixed with convex balls 17. The diameter of the convex balls 17 is larger than the diameter of the guide rope 10. The support bar 7 is provided with a slot 171 near the corresponding guide rope 10. The support bar 7 limits the corresponding convex balls 17 through the slot 171, which facilitates the installation of the guide rope 10.

[0046] See Figure 2 and Figure 9 All guide ropes 10 on the same support bar 7 are fixed together with equally spaced connecting rods 18. The connecting rods 18 are used to provide support for the PCB, supporting the front and rear parts of the flexible PCB board, reducing the curling of the flexible PCB board on both sides, which prevents the liquid medicine from entering between the front and rear sides of the two adjacent PCB boards, and improving the contact efficiency between the liquid medicine and the PCB board.

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

Claims

1. A tilting fixture for PCB boss immersion gold production, characterized in that it comprises: A frame (1) has two symmetrically distributed overlapping frames (2) fixedly connected to its upper side. Two sets of symmetrically distributed sliding rods (3) are fixedly connected to the frame (1). Each set of sliding rods (3) consists of two symmetrically distributed rods. The two sliding rods (3) in the same set are provided with two symmetrically distributed connecting plates (4). An elastic element (5) is sleeved on each sliding rod (3). The elastic element (5) is located between the corresponding two connecting plates (4) and fixedly connected to them. Equally spaced sliding rings (6) are slidably connected to each sliding rod (3). All the sliding rings on the same sliding rod (3) are connected to the sliding rings. The slip ring (6) is located between the two corresponding connecting plates (4). The two corresponding slip rings (6) on different slide rods (3) in the same group of slide rods (3) are connected to the support bar (7). The support bar (7) is provided with a limiting groove (701) near the two corresponding slip rings (6). The elastic element (5) passes through all the corresponding limiting grooves (701) on the same slide rod (3). The elastic element (5) is used to drive the support bar (7) to move. The two corresponding support bars (7) in the two groups of slide rods (3) are provided with guide ropes (10) distributed at equal intervals. The connecting plate (4) is threaded with two symmetrically distributed threaded rods (8). The threaded rods (8) are hinged to a limiting block (9) on the side near the corresponding support bar (7). The support bar (7) is provided with limiting holes (801) near the two corresponding threaded rods (8). The limiting holes (801) are coaxial with the corresponding threaded rods (8). The limiting block (9) is used to limit the corresponding support bar (7).

2. The inclined hanger for the production of the PCB bump gold plating according to claim 1, characterized in that, The limiting block (9) is provided with symmetrically distributed guide slopes (901), which are used to guide the limiting block (9) through the corresponding limiting hole (801).

3. The inclined hanger for the production of the PCB bump gold plating according to claim 1, characterized in that, The connecting plate (4) and the two corresponding sliding rods (3) are slidably connected, and the elastic element (5) is a tension spring.

4. The inclined mounting fixture for PCB boss immersion gold production according to claim 3, characterized in that, Guide blocks (11) are fixedly connected to the frame (1) near the middle of the four connecting plates (4). The guide blocks (11) are provided with guide holes (111). An electric push rod (12) is installed on the overlapping frame (2). The overlapping frame (2) is provided with two positioning holes (121). A pull rope (13) is fixedly connected to the middle of the connecting plate (4). The pull rope (13) passes through the corresponding guide hole (111) and the corresponding positioning hole (121). The electric push rod (12) is used to control the corresponding two pull ropes (13).

5. The inclined mounting fixture for PCB boss immersion gold production according to claim 4, characterized in that, The edges of the guide hole (111) and the positioning hole (121) are provided with arc-shaped annular surfaces to facilitate the sliding of the pull rope (13) along the corresponding guide hole (111) and the corresponding positioning hole (121).

6. The inclined mounting fixture for PCB boss immersion gold production according to claim 4, characterized in that, The telescopic end of the electric push rod (12) is slidably connected to a main U-shaped component (14). There is friction between the main U-shaped component (14) and the telescopic end of the electric push rod (12). The overlapping frame (2) is provided with a friction groove (161) near the position corresponding to the main U-shaped component (14). A friction block (16) is slidably limited in the friction groove (161). A secondary U-shaped component (15) is fixedly connected to the friction block (16). The electric push rod (12) is used to drive the corresponding secondary U-shaped component (15) to move. The main U-shaped component (14) and the secondary U-shaped component (15) are respectively fixedly connected to two pull ropes (13) on the same side.

7. The inclined mounting fixture for PCB boss immersion gold production according to claim 3, characterized in that, The guide rope (10) is made of elastic material, and the elastic coefficient of the elastic element (5) is greater than that of the guide rope (10).

8. The inclined mounting fixture for PCB boss immersion gold production according to claim 7, characterized in that, Both ends of the guide rope (10) are fixed with convex balls (17), and the support bar (7) is provided with a slot (171) near the position corresponding to the guide rope (10). The support bar (7) limits the corresponding convex ball (17) through the slot (171).

9. A tilting fixture for PCB boss immersion gold production according to claim 8, characterized in that, All the guide ropes (10) corresponding to the same support bar (7) are fixed together with equally spaced connecting rods (18), which are used to provide support for the PCB.

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