Lead frame temporary rack

Abstract

The application provides a lead frame temporary storage rack, and belongs to the technical field of semiconductor chip processing equipment. The temporary storage rack comprises a rack body, the rack body comprises a base plate in an L-shaped cross section, outer end plates are movably arranged at both ends of the base plate respectively, inner end plates are detachably arranged on the inner side surfaces of the outer end plates, a support pin is arranged on one side of the inner end plates, and a limiting block is vertically arranged on the top surface of the horizontal part of the base plate. A side limiting piece is arranged, comprising a side plate rotatably connected to one side of the end plate, and a limiting plate is arranged on the opposite side of the side plate. When the side plate is parallel to the vertical part of the base plate, the limiting plate is used for limiting the outer side of the lead frame, and the side plate is located on the side of the limiting block facing the vertical part of the base plate. The scheme provided by the application can make the temporary storage rack suitable for storing lead frames of different sizes and structures, and has a wide application range.

Description

Technical Field

[0001] This utility model belongs to the technical field of semiconductor chip processing equipment, and in particular relates to a lead frame temporary storage rack. Background Technology

[0002] After being stamped by a punch press, the lead frame is cut into sheets. The cut lead frames need to be stacked together for transfer to subsequent processes. To avoid relative movement between the lead frames during the transfer process and to achieve batch transfer, the lead frames are usually stacked in a rack.

[0003] Existing patent document CN202420138616.4 discloses a storage rack for lead frames, which includes a frame body and a spring-loaded mechanism. The frame body has a cavity that restricts the orderly stacking of lead frames. The spring-loaded mechanism is installed in the placement area and is used to press the top of the lead frames stacked on top. The spring-loaded mechanism abuts against the upper surface of the lead frames and two pairs of inner walls of the frame body side plates to press the lead frames and prevent the stacked lead frames from shaking during transportation. Although this solution can stack and achieve batch transfer, it is not suitable for lead frames with protruding base islands on the surface, and the width dimension is not adjustable. It is only suitable for stacking lead frames of one size, which limits its applicability. Therefore, in practical applications, it is necessary to make different molds to manufacture different storage racks for lead frames of various sizes. Utility Model Content

[0004] To address the shortcomings of the existing technology, this utility model provides a lead frame temporary storage rack, which is suitable for storing lead frames of different sizes and structures, and has a wide range of applications.

[0005] In order to achieve the purpose of this utility model, the following solution is proposed: A lead frame temporary storage rack, comprising: The frame includes an L-shaped base plate with movable outer end plates at both ends of the base plate, an inner end plate detachably provided on the inner side of the outer end plate, a support pin on one side of the inner end plate, and a limiting block that extends vertically on the top surface of the outer side of the horizontal part of the base plate. The side limiting component is provided in a set, including a side plate rotatably connected to one side of the end plate. The inner side of the side plate is provided with a limiting plate that extends and retracts perpendicular to the side plate. When the side plate is parallel to the vertical part of the base plate, the limiting plate is used to limit the outer side of the lead frame located in the frame body, and the side plate is located on the side of the limiting block facing the vertical part of the base plate.

[0006] Furthermore, the vertical part of the substrate is provided with two sets of parallel and spaced-apart sliding grooves. One side of the outer end of the substrate is provided with an inverted T-shaped rod that is parallel to the vertical part of the substrate. Its horizontal section is parallel to the vertical part of the substrate. Both ends of the horizontal section are rotatably connected to rotating rods. One end of the rotating rod is rotatably connected to a bidirectional lead screw. The bidirectional lead screw is rotatably positioned in the sliding groove along the length of the substrate. Each bidirectional lead screw has two threaded sections that correspond to one sliding groove. One side of the outer end plate is provided with two sliders that are distributed vertically and slidably connected to the sliding grooves. The sliders on the same outer end plate are threadedly connected to the two bidirectional lead screws respectively.

[0007] Furthermore, the inner wall of the outer end plate is provided with a vertical dovetail groove, and the other side of the inner end plate is provided with a vertical dovetail strip, which is inserted into the dovetail groove.

[0008] Furthermore, the outer sleeve of the support pin is equipped with rollers.

[0009] Furthermore, a groove is provided in the vertical recess on the outer side of the horizontal part of the substrate, and a spring is provided in the groove. The limiting block is slidably disposed in the groove, and the bottom surface of the limiting block is connected to the upper end of the spring.

[0010] Furthermore, the side of the limiting block away from the vertical part of the substrate has an inclined surface, and the lower end of the inclined surface faces the outside of the substrate.

[0011] Furthermore, a set of crossbars is vertically provided on one side of the limiting plate, and spring pins are provided along the array of crossbars. Mounting holes are provided through both sides of the side plate, and limiting holes for connecting spring pins are provided vertically along the axis direction perpendicular to the mounting holes.

[0012] Furthermore, the other side of the limiting plate is covered with a flexible gasket.

[0013] Furthermore, the horizontal part of the substrate is provided with a guide groove parallel to the slide groove, and the bottom of the outer end plate is provided with a guide block that is slidably connected to the guide groove.

[0014] The beneficial effects of this utility model are as follows: The distance between the two outer end plates is adjustable, and a limiting plate is telescopically installed on one side of the side plate to accommodate lead frames of different sizes. A detachable inner end plate is installed on the inner wall of the outer end plate, and multiple rows of support pins are installed on the side of the inner end plate away from the outer end plate to accommodate lead frames with different surface structures. This increases the applicability of the temporary storage rack and saves the cost of making different storage racks by opening molds. Attached Figure Description

[0015] The accompanying drawings described herein are merely illustrative of selected embodiments, not all possible implementations, and are not intended to limit the scope of this invention.

[0016] Figure 1 A schematic diagram illustrating the application scenario of this application is shown.

[0017] Figure 2 This application shows the path along Figure 1 Cross-sectional view in the width direction.

[0018] Figure 3 A three-dimensional structural schematic diagram of this application is shown.

[0019] Figure 4 A three-dimensional structural diagram of the other side of this application is shown.

[0020] Figure 5 A schematic diagram of the connection structure between the substrate and the outer end plate of this application is shown.

[0021] Figure 6 This application shows Figure 5 A magnified view of part C in the diagram.

[0022] Figure 7 A schematic diagram of the inner end plate structure of this application is shown.

[0023] Figure 8 This application shows Figure 2 A magnified view of part B in the diagram.

[0024] Figure 9 A schematic diagram of the limiting plate structure of this application is shown.

[0025] Figure 10 This application shows Figure 2 A magnified view of part A in the diagram.

[0026] The markings in the diagram are: lead frame-1, frame-10, base plate-11, slide groove-111, T-shaped rod-112, rotating rod-113, double-acting lead screw-114, groove-115, spring-116, guide groove-117, outer end plate-12, slider-121, dovetail groove-122, guide block-123, inner end plate-13, support pin-131, dovetail strip-132, limiting block-14, inclined surface-141, side limiting component-20, side plate-21, limiting hole-211, limiting plate-22, crossbar-221, spring pin-222, flexible gasket-223. Detailed Implementation

[0027] To make the objectives, technical solutions and advantages of the present utility model clearer, the implementation methods of the present utility model will be described in detail below with reference to the accompanying drawings. However, the embodiments described in the present utility model are only some embodiments of the present utility model, and not all embodiments.

[0028] like Figures 1-10 As shown, this embodiment provides a lead frame temporary storage rack, including a frame body 10 and a side limiting member 20.

[0029] Specifically, such as Figures 3-4 As shown, the frame 10 includes a base plate 11, an outer end plate 12, an inner end plate 13, and a limiting block 14. The base plate 11 is a plate structure with an L-shaped cross-section. Its horizontal part is arranged horizontally, and the vertical part of the base plate 11 is provided with two sets of parallel and spaced sliding grooves 111, and the two sets of sliding grooves 111 are symmetrically arranged along the midpoint of the length direction of the base plate 11.

[0030] A set of outer end plates 12 are symmetrically arranged at both ends of the substrate 11. The outer end plates 12 are vertically perpendicular to the horizontal portion of the substrate 11, and one side of the outer end plates 12 is perpendicular to the vertical portion of the substrate 11. Two vertically distributed sliders 121 are provided on the side of the outer end plates 12 facing the vertical portion of the substrate 11. The sliders 121 are slidably connected to the corresponding grooves 111. The side limiting member 20 is located on the outer side of the outer end plates 12 away from the vertical portion of the substrate 11, and the side limiting member 20 is perpendicular to the top surface of the horizontal portion of the substrate 11.

[0031] A through hole is provided along the length of the substrate 11 through the slide groove 111. A bidirectional lead screw 114 is rotatably installed in the through hole so that the same bidirectional lead screw 114 passes through two parallel and spaced slide grooves 111 in sequence, and the two threaded sections with opposite directions on the same bidirectional lead screw 114 correspond to one slide groove 111 respectively, ensuring that the corresponding threaded sections in the upper and lower slide grooves 111 on the same side have the same direction of rotation.

[0032] Next, the two sliders 121 on the outer end plate 12 are threadedly connected to the corresponding threaded sections in the upper and lower slide grooves 111 on the same side of the substrate 11, and the ends of the two bidirectional lead screws 114 in the same direction are provided with rotating rods 113, and the other ends of the two rotating rods 113 are respectively rotatably connected to the two ends of the horizontal section of the same T-shaped rod 112, and the horizontal section of the T-shaped rod 112 is parallel to the vertical part of the substrate 11, and the vertical section of the T-shaped rod 112 is perpendicular to the side of the horizontal section of the T-shaped rod 112 away from the substrate 11.

[0033] By rotating the horizontal section of the T-shaped rod 112, the rotating rod 113 is driven to rotate, thereby causing the two bidirectional lead screws 114 to rotate synchronously. This allows for synchronous adjustment of the distance between the two outer end plates 12, thus accommodating the storage of lead frames 1 of different lengths and improving its applicability.

[0034] Preferred, such as Figures 5-6 As shown, in order to improve the stability of the movement of the outer end plate 12, guide grooves 117 are symmetrically provided on the horizontal part of the base plate 11. The guide grooves 117 are parallel to the slide grooves 111, and the two ends of the guide grooves 117 are flush with the two ends of the corresponding slide grooves 111. A guide block 123 is provided at the lower end of the outer end plate 12, and the guide block 123 is slidably disposed in the guide grooves 117.

[0035] like Figure 3 , Figure 5 , Figure 7As shown, the inner end plate 13 is located inside the end plate 12, and the inner side of the outer end plate 12 is provided with two vertically arranged dovetail grooves 121. The inner end plate 13 facing the outer end plate 12 is provided with two vertically arranged dovetail strips 132, which are vertically inserted into the corresponding dovetail grooves 121. The inner plate 13 away from the outer end plate 12 is provided with multiple rows of support pins 131 arranged vertically. When placed, the two ends of the lead frame 1 are supported by the support pins 131. In order to reduce the friction between the lead frame 1 and the support pins 131, a roller is sleeved on the outer wall of the support pins 131.

[0036] like Figure 2 , Figure 8 As shown, a set of grooves 115 are recessed on the top surface of the outer side of the horizontal part of the substrate 11. A spring 116 is provided in the grooves 115. A limiting block 14 is slidably disposed in the grooves 115, and the bottom surface of the limiting block 14 is connected to the upper end of the spring 116. In normal condition, the upper end of the limiting block 14 protrudes from the top surface of the horizontal part of the substrate 11, and the lower end of the limiting block 14 is always kept in the upper part of the grooves 115 to prevent the spring 116 from being exposed in the horizontal part of the substrate 11, thereby causing the limiting block 14 to lose its limiting function.

[0037] When the side limiting member 20 rotates to be parallel to the vertical part of the substrate 11, the side of the limiting block 14 facing the vertical part of the substrate 11 abuts against the outer side of the side limiting member 20 to limit the side limiting member 20. In order to facilitate the side limiting member 20 to enter between the limiting block 24 and the vertical part of the substrate 11, an inclined surface 141 is provided on the side of the limiting block 24 away from the vertical part of the substrate 11.

[0038] A set of inner end plates 13, substrate 11 and side limiting members 20 form a stacking area for lead frames 1, which is applicable not only to the stacking of lead frames with flat surfaces, but also to the stacking of lead frames with concave and convex structures on their surfaces.

[0039] like Figures 1-3 , Figure 8 As shown, a set of side limiting members 20 are provided, and are rotatably connected to the side of the outer end plate 12 away from the vertical part of the substrate 11. The side limiting member 20 includes a side plate 21 and a limiting plate 22. One side of the side plate 21 is connected to the outer wall of the outer end plate 12 away from the vertical part of the substrate 11 by a hinge, so that when the side plate 21 rotates towards the inner wall of the outer end plate 12, the side of the outer end plate 12 away from the vertical part of the substrate 11 can be used to limit the rotation angle of the side plate 21. The limiting plate 22 is provided on the opposite side of the side plate 21. When the side plate 21 is parallel to the vertical part of the substrate 11, the limiting plate 22 is used to limit the outer side of the lead frame 1. When the limiting plate 22 is used to limit the outer side of the lead frame 1, the side plate 21 is made parallel to the vertical part of the substrate 11 under the action of the side of the outer end plate 12 away from the vertical part of the substrate 11, so that the contact length between the limiting plate 22 and the lead frame 1 is the same as the width of the limiting plate 22.

[0040] In order to reduce the friction between the limiting plate 22 and the lead frame 1, a flexible gasket 223 is covered on the inner side of the limiting plate 22.

[0041] like Figures 1-2 , Figures 9-10 As shown, in order to accommodate lead frame 1 of different widths, two horizontal bars 221 are vertically arranged on the side of the limiting plate 22 opposite to the side plate 21, and multiple spring pins 222 are arranged in an array along the axial direction of the horizontal bars 221. The side plate 21 has mounting holes through both sides, and a limiting hole 211 for connecting the spring pins 222 is provided vertically along the axial direction perpendicular to the mounting holes.

[0042] In use, push the crossbar 221 in a direction perpendicular to the side plate 21 so that the side of the limiting plate 22 with the flexible pad 223 abuts against the outside of the lead frame 1, and insert the corresponding spring pin 222 into the limiting hole 211, thereby determining the length of the limiting plate 22 extending toward the vertical part of the substrate 11.

[0043] The design of the flexible gasket 223 can not only reduce the friction between the limiting plate 22 and the lead frame 1, but also compensate for the gap between the limiting plate 22 and the lead frame 1 when different spring pins 222 are in the limiting hole 211.

[0044] Specific usage process: Rotate the side plate 21 outward toward the outer side of the outer end plate 12 so that the limiting plate 22 moves out of the top surface of the horizontal part of the base plate 11.

[0045] The lead frame 1 is stacked on the top surface of the horizontal part of the substrate 11 along the length direction of the substrate 11. The vertical section of the T-shaped rod 112 is rotated, causing the two bidirectional lead screws 114 to rotate synchronously, so that the two outer end plates 12 move relative to each other, thereby limiting the two ends of the stacked lead frame 1. The side plate 21 is rotated inward towards the outer end plate 12. During the rotation, the lower end of the side plate 21 presses against the inclined surface 141, so that the limiting block 14 is accommodated in the groove 115, thereby avoiding the side plate 21. After the side plate 21 moves past the top surface of the limiting block 14, the limiting block 14 automatically resets under the action of the spring 116, thereby limiting the outer side of the side plate 21. At this time, the side plate 21 is parallel to the vertical part of the substrate 11.

[0046] The crossbar 221 is pushed in the direction perpendicular to the side plate 21 toward the vertical part of the substrate 11. The crossbar 221 pushes the limiting plate 22 toward the outside of the lead frame 1 and makes the flexible pad 223 abut against the outside of the lead frame 1, so that the two sides of the lead frame 1 are respectively limited by the flexible pad 223 and the vertical part of the substrate 11.

[0047] Preferably, when the surface of the lead frame 1 at the required location does not have a concave-convex structure, in order to increase the stacking amount, the inner end plate 13 can be pulled out vertically upward along the dovetail groove 121.

[0048] The above description is merely a preferred embodiment of this utility model and does not imply its uniqueness or limitation. Those skilled in the art should understand that various changes or equivalent substitutions made to this utility model without departing from its scope are all within the protection scope of this utility model.

Claims

1. A lead frame temporary storage rack, characterized in that, include: The frame (10) includes a base plate (11) with an L-shaped cross-section. The two ends of the base plate (11) are respectively provided with outer end plates (12). The inner side of the outer end plate (12) is provided with an inner end plate (13). One side of the inner end plate (13) is provided with a support pin (131). The top surface of the outer side of the horizontal part of the base plate (11) is provided with a limiting block (14) that extends vertically. The side limiting member (20) is provided in a set, including a side plate (21) rotatably connected to one side of the end plate (12). The inner side of the side plate (21) is provided with a limiting plate (22) that extends and retracts perpendicular to the side plate (21). When the side plate (21) is parallel to the vertical part of the base plate (11), the limiting plate (22) is used to limit the outer side of the lead frame (1) located in the frame (10), and the side plate (21) is located on the side of the limiting block (14) facing the vertical part of the base plate (11).

2. The lead frame temporary storage rack according to claim 1, characterized in that, The vertical part of the substrate (11) is provided with two sets of parallel and spaced grooves (111). One side of the outer end of the substrate (11) is provided with an inverted T-shaped rod (112) that is parallel to the vertical part of the substrate (11). Its horizontal section is parallel to the vertical part of the substrate (11). The two ends of the horizontal section are respectively connected to rotating rods (113). One end of the rotating rod (113) is rotatably connected to a double-acting screw (114). The double-acting screw (114) is rotatably disposed in the groove (111) along the length direction of the substrate (11). The two threaded sections on each double-acting screw (114) correspond to a groove (111) respectively. The outer end plate (12) is provided with two sliders (121) that are distributed vertically and slidably connected to the grooves (111). The sliders (121) on the same outer end plate (12) are respectively threadedly connected to the two double-acting screws (114).

3. The leadframe temporary rack of claim 1, wherein, The inner wall of the outer end plate (12) is provided with a dovetail groove (122) vertically, and the other side of the inner end plate (13) is provided with a dovetail strip (132) vertically, which is inserted into the dovetail groove (122).

4. The leadframe temporary rack of claim 1, wherein, The outer sleeve of the support pin (131) is equipped with a roller.

5. The leadframe temporary rack of claim 1, wherein, The substrate (11) has a groove (115) vertically recessed on the outer side of the horizontal part. A spring (116) is provided in the groove (115). A limiting block (14) is slidably disposed in the groove (115), and the bottom surface of the limiting block (14) is connected to the upper end of the spring (116).

6. The leadframe temporary rack of claim 1, wherein, The limiting block (14) has a slope (141) on the side away from the vertical part of the substrate (11), and the lower end of the slope (141) faces the outside of the substrate (11).

7. The leadframe temporary rack of claim 1, wherein, A set of crossbars (221) is vertically provided on one side of the limiting plate (22), and spring pins (222) are arranged in an array along the crossbars (221). The side plate (21) has mounting holes on both sides, and a limiting hole (211) for connecting the spring pins (222) is provided vertically along the axis direction perpendicular to the mounting holes.

8. The leadframe temporary rack of claim 7, wherein, The other side of the limiting plate (22) is covered with a flexible gasket (223).

9. The leadframe temporary rack of claim 1, wherein, The substrate (11) has a guide groove (117) parallel to the slide groove (111) on its horizontal part, and the bottom of the outer end plate (12) has a guide block (123) that is slidably connected to the guide groove (117).

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