A lead frame surface mount device

Abstract

The present application provides a lead frame surface mount device, which includes a lead frame distributed in a strip shape. The lead frame includes a frame edge, and positioning ports are symmetrically opened on both sides of the frame edge. It further includes a mounting device, which includes a continuous conveying component and a picking component. The continuous conveying component includes a support table, the lead frame is arranged on the support table, support legs are fixed at the bottom of the support table, first support frames are symmetrically fixed on both sides of the support table, push blocks are symmetrically and slidably connected to the side of the first support frames close to each other, and an intermittent driving component is arranged between the push blocks and the support table. A lead frame surface mount device provided by the present invention, when the push blocks are driven by the intermittent driving component to reciprocate and inserted into the positioning ports, drives the frame edge to move forward by pushing the positioning ports, so as to realize continuous feeding and improve the efficiency of the automated production process.

Description

Technical Field

[0001] The present invention relates to the technical field of lead frames, and particularly to a lead frame surface mount device and equipment. Background Art

[0002] A lead frame, also known as a LeadFrame, Conductor frame (emphasizing the conductive function), or Pin frame (emphasizing the pin function), is a professional term in the fields of electronic engineering and electronic packaging. It refers to a metal frame used to support and connect the pins of an electronic chip. It is the basic material for semiconductor packaging. In semiconductor packaging technology, a manufactured chip needs to be removed from the dicing film and placed at a set position on the lead frame or packaging substrate (substrate) for the next step of wire bonding or other interconnection processes. This step is actually a kind of mounting technology, and the lead frame surface mount device and equipment is one of the key devices to realize this technology.

[0003] For example, a lead frame with the publication number CN112768429A is used for packaging semiconductor devices, including an intermediate frame, a bottom frame, and a top frame. The first pin and the second pin are arranged on the intermediate frame, the third pin is arranged on the bottom frame, and the fourth pin is arranged on the top frame. Both the first pin and the second pin have solder pads, and the solder pads are both provided with downward first bumps. The third pin is provided with a support plate corresponding to the solder pad, and a chip is arranged between the upper surface of the support plate and the bottom surface of the first bump. The fourth pin is provided with a pressing plate corresponding to the solder pad, and the bottom of the pressing plate is provided with downward second bumps corresponding to the first bumps, and a chip is arranged between the upper surface of the solder pad and the bottom surface of the second bump. The bottom frame, the intermediate frame, and the top frame are overlapped and assembled from bottom to top. The top frame, the intermediate frame, and the bottom frame all have a plurality of rectangular cavities corresponding up and down, and a plurality of semiconductor device packaging areas are formed in an array along the length direction inside the rectangular cavities. It is convenient for packaging semiconductor devices with multiple chips and has high production efficiency.

[0004] Based on the retrieval of the above patent and the discovery of the devices in the prior art: The existing lead frame components are generally arranged in an array form. When mounting a chip, this component needs to be accurately placed on the positioning disk. Subsequently, the grasping robotic arm will precisely grasp the chip from the substrate and steadily mount it on the base island of the lead frame. Once a round of mounting is completed, the old lead frame component needs to be replaced with a new one for the next operation. This series of steps is rather complex and time-consuming, which not only increases the difficulty of manual operation but also limits the efficiency of the automated production process. Simplifying this operation process is of great significance for improving the overall production efficiency. Therefore, we make improvements on this and propose a lead frame surface mount device and equipment. Summary of the Invention

[0005] The object of the present invention is as follows: Currently, existing lead frame components are generally arranged in an array form. When mounting a chip, this component needs to be precisely placed on the positioning plate. Subsequently, the grasping robotic arm will accurately pick up the chip from the substrate and steadily mount it on the base island of the lead frame. Once a round of mounting is completed, the old lead frame component needs to be replaced with a new one for the next round of operation. This series of steps is rather complex and time-consuming, not only increasing the difficulty of manual operation but also restricting the efficiency of the automated production process.

[0006] To achieve the above-mentioned object of the invention, the present invention provides the following: When the push block is driven reciprocally by the intermittent driving component and inserted into the interior of the positioning opening, the frame edge is driven forward by pushing the positioning opening, thereby realizing continuous feeding, which is beneficial to reducing the difficulty of manual operation and improving the efficiency of the automated production process to solve the above problems.

[0007] Specifically, the present application is as follows:

[0008] A surface mounting device for a lead frame includes a lead frame distributed in a strip shape. The lead frame includes a frame edge, and base islands are arranged inside the frame edge. A plurality of connecting pins are evenly fixed on the inner sides of the frame edges. The base islands and the frame edges are fixed by blank pins. Positioning openings are symmetrically formed on both sides of the frame edge.

[0009] It further includes a mounting device, and the mounting device includes a continuous conveying component and a picking component.

[0010] The continuous conveying component includes a support table. The lead frame is arranged on the support table. Supporting legs are fixed at the bottom of the support table. First support frames are symmetrically fixed on both sides of the support table. Push blocks are symmetrically and slidably connected to the mutually approaching sides of the first support frames. An intermittent driving component is arranged between the push blocks and the support table.

[0011] The intermittent driving component includes second support frames symmetrically fixed at one end of the support table. A transmission rod is rotatably connected to the common bottom of the two second support frames. A second straight gear is fixed on the surface of the transmission rod. A second single-headed motor is fixed at the bottom of the support table. A first straight gear is fixed at the output end of the second single-headed motor. The first straight gear meshes with the second straight gear.

[0012] At both ends of the mutually remote sides of the two second support frames, a first single-headed pulley and a second single-headed pulley are respectively and symmetrically rotatably connected. The second single-headed pulley is fixed to both ends of the transmission rod. The two second single-headed pulleys are driven and connected by a first toothed transmission belt. A rocker is rotatably connected to the top of the mutually approaching sides of the two second support frames. The rocker is fixed to the first single-headed pulley.

[0013] A first adjusting rod is arranged between the two rocking arms, two ends of the first adjusting rod are respectively slidably connected to the inside of the rocking arm, two ends of the surface of the first adjusting rod are symmetrically fixed with connecting rings, the surface of the connecting ring is rotatably connected with a rotating ring, a push rod is fixed to the outside of the rotating ring, one end of the push rod away from the rotating ring is rotatably connected to the first connecting plate, one end of the first connecting plate is fixed with a mounting shell, the push block is rotatably connected to the inside of the mounting shell, and a stroke adjusting component is arranged between the first adjusting rod and the rocking arm;

[0014] The travel adjustment component includes a first single-head motor fixed to one side of the first adjusting rod, two ends of the inner side of the first adjusting rod are symmetrically rotatably connected to nuts, and a third single-head pulley is fixed to the outer side of the nut, and a double-head pulley is rotatably connected to the inside of the first single-head motor and at a position located between the two nuts, and the double-head pulley is fixed to the output end of the first single-head motor, and the double-head pulley and the two third single-head pulleys are respectively connected by a second toothed transmission belt. A second threaded rod is fixed to the inside of the rocker, and the second threaded rod is threadedly connected to the inside of the nut, and the push rod drives the push block to reciprocate through the first connecting plate and the mounting shell, and the push block disengages from the inside of the positioning port when moving backward, and is inserted into the inside of the positioning port when the push block pushes the positioning port forward, and drives the frame edge to move forward by pushing the positioning port.

[0015] As a preferred technical solution of the present application, an anti-overflow groove is provided at the edge of the top of the base island.

[0016] As a preferred technical solution of the present application, a slider is fixed to one side of the first connecting plate, a guide rail is fixed to the side where the two first supporting frames are close to each other, and the slider is slidably connected to the surface of the guide rail.

[0017] As a preferred technical solution of the present application, the bottom of the push block and the side close to the rotating ring are provided with rounded corners, a return spring is arranged between the top of the push block and the mounting shell, and a stop block is fixed on the side of the mounting shell away from the rotating ring and on the top of the push block.

[0018] As a preferred technical solution of the present application, limit plates are symmetrically and slidably connected to the top of the support table. Slide holes are provided inside the support table at positions at both ends of the limit plates. Second connecting plates are fixed to both ends of the limit plates. The second connecting plates are slidably connected inside the slide holes. A second adjusting rod is jointly fixed to the bottoms of the two second connecting plates. Fixed rods are symmetrically fixed to the bottom of the support table. The second adjusting rod is located between the two fixed rods. Guide rods are symmetrically fixed between the two fixed rods. Both ends of the second adjusting rod are slidably connected to the guide rods. A double-headed motor is fixed to the bottom of the support table. First threaded rods are fixed to the two output ends of the double-headed motor. The thread rotation directions of the two first threaded rods are opposite. The two first threaded rods are respectively threadedly connected to the second adjusting rod.

[0019] As a preferred technical solution of the present application, the picking component includes a support table fixed to one side of the support table. A third single-headed motor is fixed to the bottom of the support table. An outer housing is fixed to the upper surface of the support table. A third straight gear and a fourth straight gear are rotatably connected inside the outer housing. The third straight gear meshes with the fourth straight gear. The output end of the third single-headed motor is fixed to the fourth straight gear. An electric telescopic seat is rotatably connected to the top of the outer housing. The electric telescopic seat is fixed to the third straight gear. A rocker arm is fixed to the top of the electric telescopic seat. A connecting shaft is fixed to the bottom of the end of the rocker arm away from the electric telescopic seat. A suction cup is provided at the bottom of the connecting shaft.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] In the solution of the present application:

[0022] 1. In order to solve the problem that in the prior art, the grasping robotic arm will precisely grasp the chip from the substrate and steadily mount it on the base island of the lead frame. Once a round of mounting is completed, the old lead frame assembly needs to be replaced with a new one for the next round of operation. This series of steps is quite complex and time-consuming, which not only increases the difficulty of manual operation but also limits the efficiency of the automated production process. In the present application, when the intermittent driving component drives the push block to reciprocate and insert into the positioning port, the frame edge is driven to move forward by pushing the positioning port, realizing continuous feeding, which is beneficial to reducing the difficulty of manual operation and improving the efficiency of the automated production process;

[0023] 2. The rotation of the first single-headed motor drives the double-headed pulley to rotate. The double-headed pulley drives the third single-headed pulley and the nut to rotate through the second toothed transmission belt. When the nut rotates, it is threadedly connected to the second threaded rod, thereby driving the first adjusting rod to move along the axis of the second threaded rod. By adjusting the distance between the first adjusting rod and the first single-headed pulley, the movement stroke of the push block is adjusted, which is beneficial to improving the use effect of the device and solves the problem that the feeding stroke is not easy to adjust in the prior art;

[0024] 3. The rotation of the double-headed motor drives the first threaded rod to rotate. When the first threaded rod rotates, it drives the second adjusting rods to move closer to or away from each other, thereby adjusting the distance between the two limit plates, enabling the device to adapt to lead frames of different widths, further improving the use effect of the device, and solving the problem that it is not easy to adapt to lead frames of different widths in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of the lead frame provided by the present application;

[0026] Figure 2 It is a schematic structural diagram of the mounting device provided by the present application;

[0027] Figure 3 It is a schematic bottom structural diagram of the support platform provided by the present application;

[0028] Figure 4 It is a schematic internal structural diagram of the rocker provided by the present application;

[0029] Figure 5 It is a schematic partial structural diagram of the stroke adjustment component provided by the present application;

[0030] Figure 6 It is a schematic partial structural diagram of the intermittent drive component provided by the present application;

[0031] Figure 7 provided by the present application Figure 6 partial enlarged structural diagram;

[0032] Figure 8 It is a schematic internal structural diagram of the mounting shell provided by the present application;

[0033] Figure 9 It is a schematic structural diagram of the pickup component provided by the present application.

[0034] Labels in the figure:

[0035] 1. Frame edge; 2. Positioning port; 3. Base island; 4. Anti-overflow groove; 5. Connection pin; 6. First support platform; 7. First support frame; 8. Pressing roller; 9. Stopper; 10. First single-headed pulley; 11. First toothed drive belt; 12. Second single-headed pulley; 13. Guide rail; 14. Second support frame; 15. Push rod; 16. Rocker; 17. First single-headed motor; 18. First adjusting rod; 19. Support leg; 20. Fixed rod; 21. Guide rod; 22. Second adjusting rod; 23. First threaded rod; 24. Double-headed motor; 25. Slide hole; 26. Second single-headed motor; 27. First spur gear; 28. Second spur gear; 29. Transmission rod; 30. Second threaded rod; 31. Nut; 32. Third single-headed pulley; 33. Second toothed drive belt; 34. Double-headed pulley; 35. First connecting plate; 36. Slide block; 37. Installation shell; 38. Push block; 39. Connection ring; 40. Rotating ring; 41. Return spring; 42. Third single-headed motor; 43. Third spur gear; 44. Fourth spur gear; 45. Outer housing; 46. Electric telescopic seat; 47. Rocker arm; 48. Connecting shaft; 49. Suction cup; 50. Blank pin; 51. Limiting plate; 52. Second connecting plate; 53. Second support platform. Detailed implementation mode

[0036] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] As described in the background art, the existing lead frame components are generally arranged in an array form. When mounting the chip, this component needs to be accurately placed on the positioning disk. Subsequently, the grasping robotic arm will precisely pick up the chip from the substrate and firmly mount it on the base island of the lead frame. Once a round of mounting is completed, the old lead frame component needs to be replaced with a new one for the next round of operation. This series of steps is quite complex and time-consuming, which not only increases the difficulty of manual operation but also limits the efficiency of the automated production process.

[0038] To solve this technical problem, the present invention provides a device for surface mounting components on a lead frame, which is applied to the surface mounting of a lead frame.

[0039] Embodiment 1

[0040] Please refer to Figures 1-9 ,

[0041] It includes a lead frame distributed in a strip shape. During production, multiple lead frames are connected end to end to form an integral belt-shaped lead frame assembly, which is convenient for continuous feeding during chip mounting. The lead frame includes a frame edge 1. Inside the frame edge 1, a base island 3 is provided. The surface of the base island 3 is used for mounting chips. Multiple groups of connection pins 5 are evenly fixed on the inner side of the frame edge 1. The base island 3 is fixed to the frame edge 1 through blank pins 50. Positioning ports 2 are symmetrically opened on both sides of the frame edge 1, and the frame edge 1 is positioned through the positioning ports 2. It also includes a chip mounting device, which includes a continuous conveying component and a picking component. The picking component is used to grab the chips on the substrate, and the continuous conveying component is used to convey the lead frame to a specified position. The picking component includes a support platform 53 fixed on one side of a support platform 6. A third single-headed motor 42 is fixed to the bottom of the support platform 53. An outer housing 45 is fixed to the upper surface of the support platform 53. Inside the outer housing 45, a third spur gear 43 and a fourth spur gear 44 are rotatably connected. The third spur gear 43 meshes with the fourth spur gear 44. The output end of the third single-headed motor 42 is fixed to the fourth spur gear 44. An electric telescopic seat 46 is rotatably connected to the top of the outer housing 45. The electric telescopic seat 46 is fixed to the third spur gear 43. A rocker arm 47 is fixed to the top of the electric telescopic seat 46. A connecting shaft 48 is fixed to the bottom of the end of the rocker arm 47 away from the electric telescopic seat 46. A suction cup 49 is provided at the bottom of the connecting shaft 48. Specifically, the third single-headed motor 42 drives the fourth spur gear 44 to rotate. The fourth spur gear 44 drives the third spur gear 43 to rotate through meshing with the third spur gear 43, thereby driving the suction cup 49 to rotate above the substrate. The electric telescopic seat 46 is used to drive the suction cup 49 to move up and down, and then grab the chips on the substrate and mount them on the base island 3;

[0042] A pressure roller 8 is symmetrically rotatably connected between two first support frames 7. The surface of the pressure roller 8 is made of rubber;

[0043] The continuous conveying component includes a support platform 6. The lead frame is arranged on the support platform 6. Support legs 19 are fixed to the bottom of the support platform 6. First support frames 7 are symmetrically fixed on both sides of the support platform 6. Pusher blocks 38 are symmetrically slidably connected to the side of the first support frames 7 close to each other. An intermittent driving component is arranged between the pusher blocks 38 and the support platform 6. Specifically, when the pusher blocks 38 are driven by the intermittent driving component to reciprocate and insert into the positioning ports 2, the frame edge 1 is driven forward by pushing the positioning ports 2, thereby realizing continuous feeding, which is beneficial to reducing the difficulty of manual operation and improving the efficiency of the automated production process;

[0044] An anti-overflow groove 4 is opened at the edge position of the top of the base island 3. When mounting chips, the excess glue can flow into the anti-overflow groove 4, reducing glue overflow and being beneficial to improving the encapsulation quality;

[0045] The intermittent driving component includes a second support frame 14 symmetrically fixed at one end of the support table 6. The bottoms of the two second support frames 14 are jointly rotatably connected with a transmission rod 29. A second straight gear 28 is fixed on the surface of the transmission rod 29. A second single-headed motor 26 is fixed at the bottom of the support table 6. The output end of the second single-headed motor 26 is fixed with a first straight gear 27. The first straight gear 27 meshes with the second straight gear 28. Specifically, the second single-headed motor 26 rotates to drive the first straight gear 27 to rotate. When the first straight gear 27 rotates, it drives the second straight gear 28 to rotate, and the transmission rod 29 is driven to rotate by the second straight gear 28;

[0046] At both ends of the mutually remote sides of the two second support frames 14, a first single-headed pulley 10 and a second single-headed pulley 12 are respectively symmetrically rotatably connected. The second single-headed pulley 12 is fixed to both ends of the transmission rod 29. The two second single-headed pulleys 12 are drivingly connected by a first toothed transmission belt 11. At the top of the mutually close sides of the two second support frames 14, a rocker 16 is rotatably connected. The rocker 16 is fixed to the first single-headed pulley 10. Specifically, when the transmission rod 29 rotates, it drives the second single-headed pulley 12 to rotate. The second single-headed pulley 12 drives the first single-headed pulley 10 to rotate through the first toothed transmission belt 11, and the rocker 16 is driven to rotate by the first single-headed pulley 10;

[0047] A first adjusting rod 18 is arranged between the two rockers 16. Both ends of the first adjusting rod 18 are slidably connected inside the rockers 16. At both ends of the surface of the first adjusting rod 18, connecting rings 39 are symmetrically fixed. A rotating ring 40 is rotatably connected to the surface of the connecting ring 39. A push rod 15 is fixed to the outside of the rotating ring 40. One end of the push rod 15 away from the rotating ring 40 is rotatably connected to a first connecting plate 35. One end of the first connecting plate 35 is fixed with a mounting shell 37. A push block 38 is rotatably connected inside the mounting shell 37. A stroke adjusting component is arranged between the first adjusting rod 18 and the rocker 16. The stroke adjusting component is used to adjust the movement stroke of the push block 38 so that the device can adapt to lead frames of different models. Specifically, when the rocker 16 rotates, it drives the first adjusting rod 18 to rotate. When the first adjusting rod 18 rotates, it pushes the push rod 15 to move through the connecting ring 39 and the rotating ring 40. The push rod 15 drives the push block 38 to reciprocate through the first connecting plate 35 and the mounting shell 37;

[0048] A slider 36 is fixed to one side of the first connecting plate 35. Guide rails 13 are fixed to the mutually close sides of the two first support frames 7. The slider 36 is slidably connected to the surface of the guide rail 13. Specifically, the slider 36 being slidably connected to the surface of the guide rail 13 is used to guide and limit the first connecting plate 35, the mounting shell 37 and the push block 38, improving the stability of the device operation;

[0049] The bottom of the pushing block 38 and on the side close to the rotating ring 40 is provided with a rounded corner. The setting of the rounded corner facilitates the detachment of the pushing block 38 from the inside of the positioning port 2 when it moves backward. A return spring 41 is arranged between the top of the pushing block 38 and the mounting shell 37. A stop block 9 is fixed on the side of the mounting shell 37 away from the rotating ring 40 and at the top of the pushing block 38. Specifically, when the pushing block 38 pushes the positioning port 2 forward, the pushing block 38 is limited by the stop block 9, and the return spring 41 is used to drive the pushing block 38 to reset, improving the stability of the equipment operation.

[0050] Embodiment 2

[0051] A lead frame surface mount device provided in Embodiment 1 is further optimized. Specifically, as Figures 2-5 shown,

[0052] The stroke adjustment component includes a first single-head motor 17 fixed on one side of the first adjusting rod 18. At both ends inside the first adjusting rod 18, nuts 31 are symmetrically rotatably connected. A third single-head pulley 32 is fixed on the outside of the nut 31. Inside the first single-head motor 17 and at the position between the two nuts 31, a double-head pulley 34 is rotatably connected. The double-head pulley 34 is fixed to the output end of the first single-head motor 17. The double-head pulley 34 and the two third single-head pulleys 32 are respectively connected by a second toothed transmission belt 33. A second threaded rod 30 is fixed inside the rocker 16. The second threaded rod 30 is threadedly connected to the inside of the nut 31. Specifically, the rotation of the first single-head motor 17 drives the double-head pulley 34 to rotate. The double-head pulley 34 drives the third single-head pulley 32 and the nut 31 to rotate through the second toothed transmission belt 33. When the nut 31 rotates, it drives the first adjusting rod 18 to move along the axis direction of the second threaded rod 30 by being threadedly connected to the second threaded rod 30. By adjusting the distance between the first adjusting rod 18 and the first single-head pulley 10, the movement stroke of the pushing block 38 is adjusted, which is beneficial to increasing the practicality of the equipment.

[0053] Embodiment 3

[0054] A lead frame surface mount device provided in Embodiment 1 is further optimized. Specifically, as Figures 2-3 shown,

[0055] The top of the support table 6 is symmetrically and slidably connected with a limit plate 51. The limit plate 51 is used to limit the two sides of the lead frame, which is beneficial to improving the feeding accuracy. Inside the support table 6 and at the positions at both ends of the limit plate 51, sliding holes 25 are provided. At both ends of the limit plate 51, second connecting plates 52 are fixedly provided. The second connecting plates 52 are slidably connected inside the sliding holes 25. At the bottom of the two second connecting plates 52, a second adjusting rod 22 is fixedly provided. At the bottom of the support table 6, fixing rods 20 are symmetrically fixed. The second adjusting rod 22 is located between the two fixing rods 20. Between the two fixing rods 20, guide rods 21 are symmetrically fixed. The two ends of the second adjusting rod 22 are slidably connected with the guide rods 21. The guide rods 21 are used to guide and limit the limit plate 51. At the bottom of the support table 6, a double-headed motor 24 is fixed. At the two output ends of the double-headed motor 24, first threaded rods 23 are fixed. The thread rotation directions of the two first threaded rods 23 are opposite. The two first threaded rods 23 are respectively threadedly connected with the second adjusting rod 22. Specifically, when the double-headed motor 24 rotates, it drives the first threaded rod 23 to rotate. When the first threaded rod 23 rotates, it drives the second adjusting rod 22 to move closer to or away from each other, thereby adjusting the distance between the two limit plates 51, enabling the device to adapt to lead frames of different widths and further increasing the practicality of the device.

[0056] The usage process of a surface mount device for a lead frame provided by the present invention is as follows:

[0057] Technical principle: The third single-head motor 42 drives the fourth straight gear 44 to rotate. The fourth straight gear 44 meshes with the third straight gear 43 to drive the third straight gear 43 to rotate, thereby driving the suction cup 49 to rotate above the substrate. The electric telescopic seat 46 is used to drive the suction cup 49 to move up and down, so as to grasp the chip on the substrate and mount it on the base island 3. The second single-head motor 26 rotates to drive the first straight gear 27 to rotate. When the first straight gear 27 rotates, it drives the second straight gear 28 to rotate. The second straight gear 28 drives the transmission rod 29 to rotate. When the transmission rod 29 rotates, it drives the second single-head pulley 12 to rotate. The second single-head pulley 12 drives the first single-head pulley 10 to rotate through the first toothed transmission belt 11. The first single-head pulley 10 drives the rocker 16 to rotate. When the rocker 16 rotates, it drives the first adjusting rod 18 to rotate. When the first adjusting rod 18 rotates, it pushes the push rod 15 to move through the connecting ring 39 and the rotating ring 40. The push rod 15 drives the push block 38 to reciprocate through the first connecting plate 35 and the mounting shell 37. When the push block 38 moves backward, it disengages from the inside of the positioning port 2. When the push block 38 pushes the positioning port 2 forward, it inserts into the inside of the positioning port 2. By pushing the positioning port 2, the frame edge 1 is driven to move forward, thereby realizing continuous feeding. The stop block 9 limits the push block 38. The return spring 41 is used to drive the push block 38 to reset. The first single-head motor 17 rotates to drive the double-head pulley 34 to rotate. The double-head pulley 34 drives the third single-head pulley 32 and the nut 31 to rotate through the second toothed transmission belt 33. When the nut 31 rotates, it is threadedly connected with the second threaded rod 30, thereby driving the first adjusting rod 18 to move along the axis direction of the second threaded rod 30. By adjusting the distance between the first adjusting rod 18 and the first single-head pulley 10, the movement stroke of the push block 38 is adjusted. The double-head motor 24 rotates to drive the first threaded rod 23 to rotate. When the first threaded rod 23 rotates, it drives the second adjusting rods 22 to move closer to or away from each other, thereby adjusting the distance between the two limiting plates 51, so that the device can adapt to lead frames of different widths.

[0058] A surface mount device for a lead frame provided by the present invention drives the push block to reciprocate and insert into the positioning port through the intermittent driving component, and drives the frame edge to move forward by pushing the positioning port, thereby realizing continuous feeding, which is beneficial to reducing the difficulty of manual operation and improving the efficiency of the automated production process.

[0059] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

[0060] It should be noted that, without conflict, the embodiments in the present invention and the features and technical solutions in the embodiments can be combined with each other.

[0061] It should be noted that like reference numerals and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it is not necessary to further define and explain it in subsequent figures.

[0062] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed broadly. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal connection of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] Obviously, the embodiments described above are only a part of the embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are shown in the figures, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing specific embodiments, or equivalently replace some of the technical features. Any equivalent structure directly or indirectly using the content of the specification and drawings of the present invention in other related technical fields is similarly within the scope of the patent protection of the present invention.

Claims

1. A lead frame surface mount device, characterized in that: The lead frame comprises a lead frame distributed in a strip shape, the lead frame comprises a frame edge (1), a base island (3) is arranged inside the frame edge (1), a plurality of groups of connecting pins (5) are evenly distributed and fixed on the inner side of the frame edge (1), the base island (3) and the frame edge (1) are fixed by blank pins (50), and positioning openings (2) are symmetrically provided on both sides of the frame edge (1); Also included is a placement device, the placement device including a continuous conveying component and a picking component; The continuous conveying component comprises a first support platform (6), the lead frame is arranged on the first support platform (6), a support leg (19) is fixed to the bottom of the first support platform (6), first support frames (7) are symmetrically fixed to both sides of the first support platform (6), a push block (38) is symmetrically slidably connected to the side of the first support frame (7) close to each other, and an intermittent driving component is arranged between the push block (38) and the first support platform (6); The intermittent drive component comprises a second support frame (14) symmetrically fixed to one end of the first support platform (6); the bottoms of the two second support frames (14) are rotatably connected to a transmission rod (29); a second spur gear (28) is fixed to the surface of the transmission rod (29); a second single-head motor (26) is fixed to the bottom of the first support platform (6); a first spur gear (27) is fixed to the output end of the second single-head motor (26); the first spur gear (27) is meshed with the second spur gear (28); The two second support frames (14) are symmetrically rotatably connected to the first single-head pulley (10) and the second single-head pulley (12) at two ends of the side away from each other, the second single-head pulley (12) is fixed to the two ends of the transmission rod (29), the two second single-head pulleys (12) are connected to each other through a first toothed transmission belt (11), and the tops of the two second support frames (14) are rotatably connected to the side close to each other, and the rocker (16) is fixed to the first single-head pulley (10); A first adjusting rod (18) is arranged between the two rocking arms (16), two ends of the first adjusting rod (18) are respectively slidably connected to the inside of the rocking arms (16), connecting rings (39) are symmetrically fixed at two ends of the surface of the first adjusting rod (18), a rotating ring (40) is rotatably connected to the surface of the connecting ring (39), a push rod (15) is fixed to the outside of the rotating ring (40), one end of the push rod (15) away from the rotating ring (40) is rotatably connected to a first connecting plate (35), one end of the first connecting plate (35) is fixed to a mounting shell (37), the push block (38) is rotatably connected to the inside of the mounting shell (37), and a stroke adjusting component is arranged between the first adjusting rod (18) and the rocking arm (16); The stroke adjustment component comprises a first single-head motor (17) fixed to one side of a first adjustment rod (18); two ends of the inner side of the first adjustment rod (18) are symmetrically rotatably connected with nuts (31); a third single-head pulley (32) is fixed to the outer side of the nut (31); a double-head pulley (34) is rotatably connected inside the first single-head motor (17) and located between the two nuts (31); the double-head pulley (34) is fixed to the output end of the first single-head motor (17); and the double-head pulley (34) and the two third single-head pulleys (32) are connected to each other. The two parts are connected by a second toothed transmission belt (33), a second threaded rod (30) is fixed inside the rocker (16), and the second threaded rod (30) is threadedly connected to the inside of the nut (31). The push rod (15) drives the push block (38) to reciprocate through the first connecting plate (35) and the mounting shell (37). When the push block (38) moves backward, it is separated from the inside of the positioning opening (2). When the push block (38) pushes the positioning opening (2) forward, it is inserted into the inside of the positioning opening (2), and the frame edge (1) is driven to move forward by pushing the positioning opening (2).

2. A lead frame surface mount device device according to claim 1, characterized in that: An anti-overflow groove (4) is provided at the edge of the top of the base island (3).

3. A lead frame surface mount device device according to claim 1, characterized in that: A sliding block (36) is fixed to one side of the first connecting plate (35), a guide rail (13) is fixed to one side of the two first supporting frames (7) close to each other, and the sliding block (36) is slidably connected to the surface of the guide rail (13).

4. A lead frame surface mount device device according to claim 3, characterized in that: A rounded corner is provided at the bottom of the push block (38) and at a side close to the rotating ring (40); a return spring (41) is provided between the top of the push block (38) and the mounting shell (37); and a stopper (9) is fixed at a side of the mounting shell (37) away from the rotating ring (40) and at the top of the push block (38).

5. A lead frame surface mount device device according to claim 1, characterized in that: The top of the first support platform (6) is symmetrically slidably connected to a limit plate (51); a sliding hole (25) is provided inside the first support platform (6) and at positions at both ends of the limit plate (51); second connecting plates (52) are provided at both ends of the limit plate (51); the second connecting plates (52) are slidably connected inside the sliding hole (25); a second adjusting rod (22) is commonly fixed at the bottom of the two second connecting plates (52); a fixing rod (20) is symmetrically fixed at the bottom of the first support platform (6); the second adjusting rod (22) is located between the two fixing rods (20); a guide rod (21) is symmetrically fixed between the two fixing rods (20); the two ends of the second adjusting rod (22) are slidably connected to the guide rod (21); a double-headed motor (24) is fixed at the bottom of the first support platform (6); two output ends of the double-headed motor (24) are fixed with a first threaded rod (23); the threads of the two first threaded rods (23) are in opposite directions, and the two first threaded rods (23) are respectively threadedly connected to the second adjusting rod (22).

6. A lead frame surface mount device device according to claim 1, characterized in that: The pickup assembly comprises a second support platform (53) fixed to one side of the first support platform (6); a third single-head motor (42) is fixed to the bottom of the second support platform (53); an outer shell (45) is fixed to the upper surface of the second support platform (53); a third spur gear (43) and a fourth spur gear (44) are rotatably connected inside the outer shell (45); the third spur gear (43) is meshed with the fourth spur gear (44); an output end of the third single-head motor (42) is fixed to the fourth spur gear (44); the top of the outer shell (45) is rotatably connected to an electric telescopic seat (46); the electric telescopic seat (46) is fixed to the third spur gear (43); a rocker arm (47) is fixed to the top of the electric telescopic seat (46); a connecting shaft (48) is fixed to the bottom of one end of the rocker arm (47) away from the electric telescopic seat (46); a suction cup (49) is provided at the bottom of the connecting shaft (48).

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