Lead frame feeding device

Abstract

This application relates to a lead frame feeding device, belonging to the field of semiconductor device packaging technology. It includes a clamping assembly comprising a clamping plate, at least two guide rods, a compression spring sleeved on the outside of the guide rods, and a fixing seat through which the guide rods pass and are mounted on the clamping frame. One end of each guide rod is vertically connected to the back of the clamping plate, and the other end passes through a guide hole on the fixing seat and extends to the outside of the clamping frame, with a limiting stop at its end. The two ends of the compression spring are respectively pressed against the inner side of the fixing seat and the back of the clamping plate. This application effectively reduces damage to the lead frame.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor device packaging technology, and in particular to a lead frame feeding device. Background Technology

[0002] Semiconductor chip packaging employs film technology and fine-machining processes to mount the chip onto a lead frame using die-attach materials, achieving circuit connection, heat dissipation, and mechanical support. The lead frame, as the chip carrier, connects the internal circuitry of the chip to external leads via metal wires, forming an electrical circuit; it is a key component in the packaging structure that acts as a bridge.

[0003] In related technologies, Chinese patent publication number CN117585405A discloses a chip frame marking device. When using this device for marking, the operator must first remove the lead frame from the raw material box, then place the entire stack of lead frames in the loading rack, and only then can the device perform the gripping and marking operations.

[0004] In view of the aforementioned prior art, the lead frame needs to be manually transferred during the material replenishment process, which may cause physical damage to it and thus affect the final performance of the chip. Therefore, the inventors believe that there is a need to provide a lead frame feeding device. Utility Model Content

[0005] In order to effectively reduce damage to the lead frame, this application provides a lead frame feeding device.

[0006] This application provides a lead frame feeding device, which adopts the following technical solution: A lead frame feeding device includes a base module, a clamping frame vertically mounted on the base module, and a clamping assembly mounted on the clamping frame. The clamping frames together form a rectangular clamping area. The clamping assembly includes a clamping plate, at least two guide rods, a compression spring sleeved on the outside of the guide rods, and a fixed seat through which the guide rods pass and mounted on the clamping frame. One end of each guide rod is vertically connected to the back of the clamping plate, and the other end passes through a guide hole on the fixed seat and extends to the outside of the clamping frame, with a limiting stop at the end. The two ends of the compression spring abut against the inside of the fixed seat and the back of the clamping plate, respectively.

[0007] By adopting the above technical solution, the lead frame material box is placed on the base module. Under the action of the compression spring, the guide rod and clamping plate of the clamping component can stably clamp the entire lead frame material box, effectively reducing damage to the lead frame and avoiding physical damage caused by manual transfer that could affect the final performance of the chip.

[0008] Optionally, the end of the guide rod away from the clamping plate is provided with an external thread, and the limiting block is provided with an internal thread that matches the external thread.

[0009] By adopting the above technical solution, when assembling the clamping assembly, the limit block can be installed to the end of the guide rod through a threaded connection, which facilitates the installation and removal of the limit block.

[0010] Optionally, the clamping plate has a detachable contour clamping block on the side facing the rectangular clamping area, and the inner contour of the contour clamping block is adapted to the outer contour of the lead frame.

[0011] By adopting the above technical solution, the inner contour of the contoured clamping block is adapted to the shape of the lead frame material box, which can better fit the lead frame material box and improve clamping stability.

[0012] Optionally, the clamping plate is made of ferrous material, and the contour clamping block is made of magnetic material.

[0013] By adopting the above technical solution, the contour clamping block is detachably connected to the clamping plate by magnetic attraction, which makes it convenient to replace contour clamping blocks of different specifications to adapt to different lead frame material boxes.

[0014] Optionally, the inner side of the contoured clamping block is also fitted with a flexible liner.

[0015] By adopting the above technical solution, the flexible liner embedded inside the contour clamping block can further buffer and reduce shock, effectively reducing damage to the lead frame material box.

[0016] Optionally, an adjustment mechanism is also included, which includes a drive motor mounted on the top of the clamping frame, a bidirectional threaded rod connected to the output shaft of the drive motor, and sliders respectively sleeved on the threaded sections on both sides of the bidirectional threaded rod. The bottom of the slider is provided with a connecting rod, which is connected to the top of the clamping plate of the clamping assembly; the connecting rod is a telescopic sleeve structure.

[0017] By adopting the above technical solution, the drive motor of the adjustment mechanism drives the bidirectional threaded rod to rotate, causing the sliders sleeved on both sides of the threaded section of the bidirectional threaded rod to move relative to or away from each other. Through the connecting rod, the clamping plate of the clamping assembly moves, thereby realizing the automatic adjustment of the clamping force and position of the lead frame material box, avoiding physical damage caused by manual transfer of the lead frame, and effectively reducing damage to the lead frame.

[0018] Optionally, the fixing seat is provided with a guide protrusion mounted on the clamping frame, the clamping frame is provided with a guide groove for the guide protrusion to slide and be installed, the clamping frame is also provided with a waist-shaped hole communicating with the guide groove, the guide protrusion is provided with a threaded hole corresponding to the waist-shaped hole, and a locking bolt is installed between the waist-shaped hole and the threaded hole on the clamping frame.

[0019] By adopting the above technical solution, a guide protrusion is set on the fixed base, a guide groove for sliding installation of the guide protrusion and an oblong hole communicating with the guide groove are opened in the clamping frame, a threaded hole corresponding to the oblong hole is opened in the guide protrusion, and a locking bolt is installed between the oblong hole and the threaded hole. This can realize the height adjustment of the clamping component and lock the adjusted position to ensure the stability of the clamping component.

[0020] Optionally, the outer side of the clamping frame is provided with a spiral protective shell for receiving the extension section of the guide rod. The spiral protective shell has an elongated hole for the guide rod to move. One end of the spiral protective shell abuts against the inner side of the limiting block, and the other side abuts against the front of the fixing seat.

[0021] By adopting the above technical solution, the spiral protective shell can accommodate the extension section of the guide rod, thereby protecting the guide rod and reducing the impact of external factors on the guide rod.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. A lead frame feeding device, comprising a base module, a clamping frame vertically mounted on the base module, and a clamping assembly mounted on the clamping frame. By placing the entire lead frame material box on the base module, the guide rod and clamping plate of the clamping assembly can stably clamp the entire lead frame material box under the action of a compression spring, effectively reducing damage to the lead frame and avoiding physical damage caused by manual transfer that could affect the final performance of the chip. 2. By installing an adjustment mechanism on the top of the clamping frame, the movement of the clamping plate of the clamping assembly can be adjusted, thereby realizing the automatic adjustment of the clamping force and position of the lead frame material box and avoiding physical damage caused by manual transfer of the lead frame; 3. By using the guide protrusion, guide groove and locking bolt, the height of the clamping component can be adjusted and the adjusted position can be locked to ensure the stability of the clamping component. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a lead frame feeding device in an embodiment of this application.

[0024] Figure 2 This is a partial structural schematic diagram of a lead frame feeding device according to an embodiment of this application.

[0025] Figure 3 This is a cross-sectional schematic diagram of the installation and engagement of the guide protrusions of the clamping frame and the fixing seat in the embodiments of this application.

[0026] Explanation of reference numerals in the attached drawings: 1. Base module; 2. Clamping frame; 21. Spiral protective shell; 22. Guide slot; 23. Waist-shaped hole; 24. Locking bolt; 3. Clamping assembly; 31. Clamping plate; 311. Contouring clamping block; 3111. Flexible liner; 32. Guide rod; 33. Compression spring; 34. Fixed seat; 341. Guide protrusion; 3411. Threaded hole; 342. Guide hole; 35. Limiting stop; 4. Adjustment mechanism; 41. Drive motor; 42. Bidirectional threaded rod; 43. Slider; 45. Connecting rod; 5. Lead wire frame material box. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0028] This application discloses a lead frame feeding device. (Refer to...) Figure 1 A leadframe loading device includes a base module 1, a clamping frame 2 vertically mounted on the base module 1, a clamping assembly 3 mounted on the clamping frame 2, and an adjustment mechanism 4 for adjusting the clamping spacing of the clamping assembly 3. The clamping frames 2 together form a rectangular clamping area. By placing the leadframe material box 5 on the base module 1 and driving the adjustment mechanism 4 to adjust the clamping assembly 3, stable clamping of the leadframe material box 5 can be achieved. This loading device effectively reduces damage caused by manual transfer of leadframes during material replenishment. In this embodiment, the leadframes are stored in the leadframe material box 5 for loading by a chip frame marking device.

[0029] Reference Figure 2 The clamping assembly 3 includes a clamping plate 31, at least two guide rods 32, a compression spring 33 sleeved on the outside of the guide rods 32, and a fixing seat 34 through which the guide rods 32 pass and are mounted on the clamping frame 2. One end of the guide rod 32 is vertically connected to the back of the clamping plate 31, and the other end passes through the guide hole 342 on the fixing seat 34 and extends to the outside of the frame, with a limiting stop 35 at the end. The two ends of the compression spring 33 are respectively pressed against the inner side of the fixing seat 34 and the back of the clamping plate 31.

[0030] Reference Figure 2The guide rod 32 has an external thread at one end away from the clamping plate 31, and the limiting block 35 has an internal thread that matches the external thread. One end of the guide rod 32 is welded to the back of the clamping plate 31, and the other end of the guide rod 32 is connected to the limiting block 35 via a threaded connection. In this embodiment, the guide rod 32 is a cylindrical metal rod, and there are two of them.

[0031] Reference Figure 2 The clamping plate 31 has a detachable contoured clamping block 311 on the side facing the rectangular clamping area. The inner contour of the contoured clamping block 311 is adapted to the outer contour of the lead frame. The inner side of the contoured clamping block 311 is also fitted with a flexible liner 3111.

[0032] Reference Figure 2 To facilitate the detachable connection between the clamping plate 31 and the contour clamping block 311, and to allow for the replacement of different specifications of the contour clamping block 311 to adapt to different lead frame material boxes 5, the clamping plate 31 is made of iron material, and the contour clamping block 311 is made of magnetic material.

[0033] Reference Figure 2 The outer side of the clamping frame 2 is provided with a spiral protective shell 21 for storing the extension section of the guide rod 32. The spiral protective shell 21 has an elongated hole for the guide rod 32 to move. One end of the spiral protective shell 21 abuts against the inner side of the limiting block 35, and the other side abuts against the front of the fixing seat 34.

[0034] Reference Figure 2 The adjustment mechanism 4 includes a drive motor 41 mounted on the top of the clamping frame 2, a bidirectional threaded rod 42 connected to the output shaft of the drive motor 41, and sliders 43 respectively sleeved on the threaded sections on both sides of the bidirectional threaded rod 42. A connecting rod 45 is provided at the bottom of the sliders 43, and the connecting rod 45 is connected to the top of the clamping plate 31 of the clamping assembly 3; the connecting rod 45 is a telescopic sleeve structure. The drive motor 41 of the adjustment mechanism 4 drives the bidirectional threaded rod 42 to rotate, causing the sliders 43 sleeved on the threaded sections on both sides of the bidirectional threaded rod 42 to move relative to or away from each other. The connecting rod 45 drives the clamping plate 31 of the clamping assembly 3 to move, thereby achieving automatic adjustment of the clamping force and position of the lead frame material box. Furthermore, the telescopic sleeve structure of the connecting rod 45 can adapt to the adjustment of the clamping assembly 3 in the height direction.

[0035] Reference Figure 2 and Figure 3The fixing base 34 is provided with a guide protrusion 341 that is mounted on the clamping frame 2. The clamping frame 2 has a guide groove 22 for sliding installation of the guide protrusion 341. The clamping frame 2 also has an oblong hole 23 that communicates with the guide groove 22. The guide protrusion 341 has a threaded hole 3411 that corresponds to the oblong hole 23. A locking bolt 24 is installed between the oblong hole 23 and the threaded hole 3411 on the clamping frame 2. The guide protrusion 341 slides along the guide groove 22, which facilitates the adjustment of the position of the clamping assembly 3 in the height direction. The position of the fixing base 34 can be adjusted and fixed by loosening or tightening the locking bolt 24.

[0036] The implementation principle of the lead frame feeding device in this application embodiment is as follows: The lead frame feeding device flexibly adjusts the position of the clamping plate 31 through the adjusting mechanism 4 to adapt to the clamping requirements of different models of lead frame material boxes 5. At the same time, the cooperation of the guide protrusion 341 of the fixed seat 34, the guide through groove 22 of the clamping frame 2, and the locking bolt 24 can realize the height adjustment of the clamping component 3 and lock the adjusted position, thereby achieving stable clamping of the lead frame material box 5 and effectively reducing damage to the lead frame.

[0037] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A lead frame feeding device, characterized in that, The device includes a base module (1), a clamping frame (2) vertically mounted on the base module (1), and a clamping assembly (3) mounted on the clamping frame (2). The clamping frame (2) together form a rectangular clamping area. The clamping assembly (3) includes a clamping plate (31), at least two guide rods (32), a compression spring (33) sleeved on the outside of the guide rods (32), and a fixing seat (34) through which the guide rods (32) pass and are mounted on the clamping frame (2). One end of the guide rod (32) is vertically connected to the back of the clamping plate (31), and the other end passes through the guide hole (342) on the fixing seat (34) and extends to the outside of the clamping frame (2), and the end is provided with a limiting stop (35). The two ends of the compression spring (33) are respectively pressed against the inside of the fixing seat (34) and the back of the clamping plate (31).

2. The lead frame feeding device according to claim 1, characterized in that, The guide rod (32) has an external thread at one end away from the clamping plate (31), and the limiting block (35) has an internal thread that matches the external thread.

3. The lead frame feeding device according to claim 1, characterized in that, The clamping plate (31) has a detachable contour clamping block (311) on the side facing the rectangular clamping area, and the inner contour of the contour clamping block (311) is adapted to the outer contour of the lead frame.

4. The lead frame feeding device according to claim 3, characterized in that, The clamping plate (31) is made of iron material, and the contour clamping block (311) is made of magnetic material.

5. The lead frame feeding device according to claim 3, characterized in that, The inner side of the contour clamping block (311) is also fitted with a flexible liner (3111).

6. The lead frame feeding device according to claim 1, characterized in that, It also includes an adjustment mechanism (4), which includes a drive motor (41) mounted on the top of the clamping frame (2), a bidirectional threaded rod (42) connected to the output shaft of the drive motor (41), and sliders (43) respectively sleeved on the threaded sections on both sides of the bidirectional threaded rod (42). The bottom of the slider (43) is provided with a connecting rod (45), which is connected to one end of the guide rod (32). The connecting rod (45) is a telescopic sleeve structure.

7. The lead frame feeding device according to claim 1, characterized in that, The fixed base (34) is provided with a guide protrusion (341) installed on the clamping frame (2). The clamping frame (2) is provided with a guide groove (22) for the guide protrusion (341) to slide and install. The clamping frame (2) is also provided with a waist-shaped hole (23) communicating with the guide groove (22). The guide protrusion (341) is provided with a threaded hole corresponding to the waist-shaped hole (23). The clamping frame (2) is provided with a locking bolt (24) between the waist-shaped hole (23) and the threaded hole.

8. The lead frame feeding device according to claim 1, characterized in that, The clamping frame (2) has a spiral protective shell (21) on the outside for receiving the extension of the guide rod (32). The spiral protective shell (21) has an elongated hole for the guide rod (32) to move. One end of the spiral protective shell (21) abuts against the inside of the limiting block (35), and the other side abuts against the front of the fixing seat (34).

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