Semiconductor lead frame material box conveying device

Abstract

The invention provides a semiconductor lead frame material box conveying device, and belongs to the technical field of semiconductor device production, the semiconductor lead frame material box conveying device comprises a bearing mechanism which comprises a connecting column and a circular bottom plate sleeving the bottom of the peripheral side of the connecting column, the peripheral side of the connecting column is provided with an even number of pairs of vertical first baffles in a circumferential array mode, and a second baffle is arranged between each pair of first baffles; the connecting column is rotationally connected to a rotating shaft, the top of the rotating shaft penetrates out of the top of the connecting column, and the connecting column is driven by a rotating mechanism to rotate; the two pushing ends of the two-way pushing mechanism are connected with the two pushing plates correspondingly, and the top of the two-way pushing mechanism is connected with the telescopic end of a lifting mechanism; the conveying belt is arranged on one side of the circular bottom plate, and the conveying direction of the conveying belt is parallel to the diameter of the circular bottom plate; the horizontal linear mechanisms are arranged below the circular bottom plate at intervals, and the movable ends are connected with the bottom of the rotating shaft. The device can automatically convey the lead frame material boxes to the material box bearing areas of a plurality of core bonding devices in the core bonding process, and the core bonding and feeding efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of semiconductor device production, and particularly relates to a semiconductor lead frame magazine conveying device. BACKGROUND

[0002] In the production process of semiconductor devices, core sticking, wire bonding, plastic packaging and other processes need to be performed on the lead frame. At present, the core sticking process usually places a magazine containing multiple lead frames as a standard part in the magazine receiving area of the core sticking equipment. Through an automatic material taking device, such as a mechanical hand with a suction cup, the lead frames in the magazine are sequentially taken out from top to bottom for core sticking, or through a material pushing device, the lead frames in the magazine are sequentially pushed out for core sticking. When using these devices to load the lead frames in the core sticking process, manual transfer of the magazine to the area used by the device to carry the magazine is required. Although a conveying belt can be used to sequentially convey the magazine to the magazine receiving area of the core sticking equipment, in order to improve production capacity, multiple core sticking equipment are used simultaneously in the existing semiconductor device processing plant, and therefore multiple magazine conveying needs to be performed simultaneously. At present, only one conveying belt cannot meet the magazine conveying and loading requirements. If multiple conveying belts are used to convey the magazine, it will result in excessive floor area, and the magazine needs to be placed on multiple conveying belts in sequence, which will additionally increase the process and affect the production efficiency. Therefore, it is necessary to improve. SUMMARY

[0003] In order to solve the above-mentioned defects of the prior art, the present application provides a semiconductor lead frame magazine conveying device, which automatically conveys the lead frame magazine to the magazine receiving area of multiple core sticking equipment for the core sticking process, and improves the loading efficiency.

[0004] In order to achieve the above-mentioned purpose, the present application adopts the following technology: A semiconductor lead frame magazine conveying device, comprising: A receiving mechanism, comprising a connecting column and a circular bottom plate sleeved on the bottom of the connecting column, the periphery of the connecting column is provided with an even number of vertical first baffles in a circumferential array, the space between each pair of first baffles forms a containing cavity, a second baffle is arranged in the containing cavity, the top height of the second baffle is lower than the top height of the first baffle, the connecting column is rotationally connected to a rotating shaft, the top of the rotating shaft penetrates through the top of the connecting column, and the connecting column is driven to rotate through a rotating mechanism; A bidirectional pushing mechanism, two pushing ends of the bidirectional pushing mechanism are respectively connected with two vertical pushing plates, the top of the bidirectional pushing mechanism is connected with the extension end of a lifting mechanism, and the lifting mechanism is fixed to the top of the rotating shaft through a support frame; A conveying belt, arranged on one side of the circular bottom plate, the conveying direction of the conveying belt is parallel to the diameter of the circular bottom plate, and the conveying belt is used to convey the magazine into the containing cavity; A horizontal linear mechanism, arranged below the circular bottom plate in a spaced manner, and the movable end of the horizontal linear mechanism is connected with the bottom of the rotating shaft.

[0005] Furthermore, the top of the connecting column is provided with a circular top plate, and the top of the rotating shaft extends through the top of the circular top plate. Multiple strip-shaped through slots are arranged in a circumferential array on the circular top plate. The multiple strip-shaped through slots are located directly above the multiple receiving cavities. The width of the strip-shaped through slots matches the width of the push plate, and the inward end of the strip-shaped through slots extends to the periphery of the connecting column, while the outward end of the strip-shaped through slots extends beyond the periphery of the circular top plate.

[0006] Furthermore, a third baffle is provided on both sides of the conveyor belt, and a second notch is provided on the end of the third baffle facing the circular base plate. The bottom height of the second notch matches the top height of the conveyor belt.

[0007] Furthermore, the circular base plate has multiple third notches arranged in a circumferential array on its periphery. Each of the multiple third notches is located directly below a multiple accommodating cavity. Both walls of the third notches are rotatably connected to multiple first rotating rollers, and the axial direction of each first rotating roller is perpendicular to the first baffle of the accommodating cavity in which it is located.

[0008] Furthermore, a mounting seat is provided at the end of the third notch away from the connecting column. The top of the mounting seat is lower than the top of the first roller. A vertical groove is opened downward on the top of the mounting seat, and a vertically movable stop is provided in the groove.

[0009] Furthermore, the top of the stop block has a first inclined surface that slopes upward toward the connecting post, and a pair of vertically arranged first springs are connected to the walls on both sides of the slide. The top of the first springs is connected to both sides of the stop block through a pair of first lugs. A rectangular block is vertically connected to the bottom of the side of the stop block near the connecting post. A fourth notch communicating with the slide is opened at the bottom of the inner side of the mounting base, and the rectangular block is located in the fourth notch.

[0010] Furthermore, a pair of slide rails are provided radially along the circular base plate between multiple mounting seats and connecting columns. A first push rod is slidably connected in the pair of slide rails. The end of the first push rod facing the mounting seat has a second inclined surface that slopes upward toward the mounting seat. When the first spring is in its natural state, the first inclined surface extends out of the top of the slide groove. The top of the first inclined surface is higher than the top height of the first roller, and the top height of the second inclined surface matches the top height of the rectangular block. A vertical through groove is provided in the middle of the side of the second baffle away from the connecting column. A second push rod is slidably connected in the vertical through groove. The bottom of the second push rod has a third inclined surface that slopes downward toward the connecting column. The other end of the first push rod is within the vertical coverage area of ​​the third inclined surface. The top of both sides of the second push rod is connected to one end of two second springs through a pair of second lugs. The other end of the second spring is connected to the top of the corresponding second baffle. When the second spring is in its natural state, there is a preset distance between the top of the third inclined surface and the top of the first push rod. When the lifting mechanism pushes the second push rod downward to the maximum extent through the push plate, the third inclined surface pushes the first push rod to move toward the mounting seat, and the second inclined surface pushes the rectangular block downward to the top of the block and retracts it into the slide groove.

[0011] Furthermore, each of the first push rods has a first connecting plate at its bottom, and each of the slide rails has a second connecting plate at its bottom. A third spring is provided between the first and second connecting plates. When the top height of the second inclined surface matches the top height of the rectangular block, the third spring is in its natural state.

[0012] Furthermore, a second rotating roller is rotatably connected to the bottom of each push plate, and the rotation axis of the second rotating roller is parallel to the width direction of the push plate.

[0013] Furthermore, the bidirectional pushing mechanism includes a first lead screw, a pair of movable blocks, and a first motor. The pair of movable blocks are slidably connected within a transverse U-shaped frame. The first lead screw has two threaded sections with opposite directions of rotation. The two movable blocks are threadedly connected to the two threaded sections respectively. Both ends of the U-shaped frame are provided with first fixed plates. The two ends of the first lead screw are rotatably connected to the two first fixed plates. The output shaft of the first motor is connected to one end of the first lead screw. A pair of push plates are connected to the bottom of the pair of movable blocks. The telescopic end of the lifting mechanism is connected to the U-shaped frame.

[0014] The beneficial effects of this invention are as follows: 1. After receiving the material boxes conveyed on the conveyor belt through the receiving mechanism, the lead frame material boxes can be automatically conveyed to the material box receiving area of ​​multiple core bonding equipment in the core bonding process through the cooperation of the horizontal linear mechanism and the bidirectional pushing mechanism, thereby improving the feeding efficiency and the degree of automation of feeding. 2. After the material box enters the receiving cavity, the stop block can prevent the material box from sliding outwards, and the stop block can be pushed out and retracted by the up and down movement of the push plate, without the need for an additional power source to control the up and down movement of multiple stop blocks. Attached Figure Description

[0015] Figure 1 This is a perspective view of the overall structure of the device according to an embodiment of this application.

[0016] Figure 2 This is a side view of a portion of the structure in the device according to an embodiment of this application.

[0017] Figure 3This is a three-dimensional structural view of the receiving mechanism in the device of this application embodiment.

[0018] Figure 4 for Figure 1 Enlarged view of section A in the middle.

[0019] Figure 5 This is a perspective view of the mounting base and stop in the device of the embodiment of this application.

[0020] Figure 6 This is a cross-sectional view of the device according to an embodiment of this application after the mounting base and the stop block are connected.

[0021] Figure 7 This is a cross-sectional view of a portion of the structure in the device according to an embodiment of this application.

[0022] Figure 8 for Figure 7 Enlarged view of section B in the middle.

[0023] Figure 9 for Figure 2 Enlarged view of section C.

[0024] Figure 10 This is a perspective view of the connection structure between the mounting base and the first push rod in the device of this application embodiment.

[0025] Figure 11 This is a perspective view of the overall structure of the bidirectional pushing mechanism in the device of this application embodiment.

[0026] Reference numerals: 1. Receiving mechanism; 2. Conveyor belt; 3. Material box; 4. Bidirectional pushing mechanism; 5. Lifting mechanism; 6. Rotating shaft; 7. Horizontal linear mechanism; 8. Second motor; 9. Second push rod; 10. First push rod; 11. Slide rail; 101. Circular base plate; 102. Connecting column; 103. First baffle; 104. Circular top plate; 105. Second baffle; 106. First rotating roller; 107. Mounting base; 108. Stop block; 201. Third baffle; 301. First notch; 401. Push plate; 402. Second rotating roller; 403. First fixed plate; 404. Movable block; 405. First lead screw; 406. First motor; 407. U-shaped frame; 501. Support frame; 701. Slider; 8. Water... Smooth table-702, second fixed plate-703, second lead screw-704, third motor-705, gear-801, fixed ring-802, gear ring-803, third inclined surface-901, second lug-902, second spring-903, second guide post-904, third notch-1011, receiving cavity-1031, strip through groove-1041, sliding groove-1071, fourth notch-1072, first inclined surface-1081, rectangular block-1082, first spring-1083, first guide post-1084, first lug-1085, second notch-2011, second inclined surface-1001, first connecting plate-1002, third spring-1003, second connecting plate-1101. Detailed Implementation

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

[0028] This application provides a semiconductor lead frame cassette conveying device, such as... Figure 1 , Figure 2 , Figure 7 As shown, it includes a receiving mechanism 1, a bidirectional pushing mechanism 4, a conveyor belt 2, a horizontal linear mechanism 7, etc.

[0029] Specifically, the receiving mechanism 1 includes a circular base plate 101 and a connecting column 102. The circular base plate 101 is fitted onto the bottom of the connecting column 102, and the two can be connected by welding. Multiple pairs of vertical first baffles 103 are arranged in a circular array around the connecting column 102, and the number of pairs of first baffles 103 is even. Specifically, the shape of the connecting column 102 can be cylindrical, or the shape of the connecting column 102 can be set according to the number of pairs of first baffles 103. For example, when there are four pairs of first baffles 103, the connecting column 102... When the first baffle 103 is a quadrangular prism and there are six pairs of first baffles 103, the connecting post 102 is a hexagonal prism, so that multiple pairs of first baffles 103 can be perpendicularly connected to multiple sides of the connecting post 102 respectively; the space between each pair of first baffles 103 forms a receiving cavity 1031, and a second baffle 105 is provided in the receiving cavity 1031. The second baffle 105 is specifically set on the side of the first baffle 103 near the connecting post 102, and is used to block the material box 3 from entering the receiving cavity 1031. The top height of the second baffle 105 is lower than that of the first baffle 103. At its top height, the connecting column 102 is rotatably connected to a rotating shaft 6, with the top of the rotating shaft 6 extending beyond the top of the connecting column 102. The connecting column 102 is driven to rotate by a rotating mechanism. Specifically, the shape of the rotating shaft 6 can be configured such that the diameter of the upper half is smaller than the diameter of the lower half, allowing the upper half to pass through the connecting column 102 and the lower half to provide support for the connecting column 102. The two pushing ends of the bidirectional pushing mechanism 4 are respectively connected to two vertical push plates 401, used to drive the two push plates 401 to move synchronously towards or in opposite directions. The top of the moving mechanism 4 is connected to the telescopic end of a lifting mechanism 5. The lifting mechanism 5 is fixed to the top of the rotating shaft 6 by a support frame 501. Specifically, two synchronous hydraulic cylinders that push out in opposite directions can be used as the bidirectional pushing mechanism 4. The conveyor belt 2 is located on one side of the circular base plate 101, and its conveying direction is parallel to the diameter of the circular base plate 101. It is used to convey the material box 3 into the receiving cavity 1031. The horizontal linear mechanism 7 is spaced below the circular base plate 101, and the movable end of the horizontal linear mechanism 7 is connected to the bottom of the rotating shaft 6.

[0030] In actual use, multiple core-bonding devices for the core-bonding process are symmetrically spaced on both sides of the horizontal linear mechanism 7, with the material box receiving area of ​​the core-bonding device facing the horizontal linear mechanism 7, and the bottom height of the material box receiving area matching the top height of the circular base plate 101. Then, the material box 3 is conveyed by the conveyor belt 2. In this scheme, the material box 3 with the first notch 301 at the bottom is selected. During conveying, the end of the material box 3 with the first notch 301 at the bottom faces away from the receiving mechanism 1 to prevent the material box 3 from entering the receiving mechanism 1 in the wrong orientation. Then, the rotating mechanism is controlled to drive the connecting column 102 to rotate in sequence, so that the receiving cavities 1031 in the multiple pairs of first baffles 103 rotate in sequence to align with the conveyor belt 2, so that the material box 3 is loaded into the receiving cavities 1031 in the multiple pairs of first baffles 103. Then, the horizontal linear mechanism is controlled. 7. Move the rotating shaft 6 and connecting column 102 to one side of a pair of core-bonding devices. Then, control the rotating mechanism to drive the connecting column 102 to rotate, so that the receiving cavities 1031 formed in the two pairs of first baffles 103 are respectively aligned with the material box receiving area of ​​a pair of core-bonding devices. Then, control the lifting mechanism 5 to drive the bidirectional pushing mechanism 4 to move downward, so that the two vertical push plates 401 move towards the corresponding two second baffles 105, so that the push plates 401 are between the material box 3 and the connecting column 102. Then, control the bidirectional pushing mechanism 4 to simultaneously drive the two push plates 401 to push the two material boxes 3 outward into the material box receiving area of ​​a pair of core-bonding devices, thus completing the feeding of the two material boxes 3. Then, control the lifting mechanism 5 and the bidirectional pushing mechanism 4 to reset, and repeat the above steps to complete the feeding of material boxes 3 to multiple pairs of core-bonding devices.

[0031] For details, please refer to Figure 1 Both sides of the conveyor belt 2 are provided with a third baffle 201 to limit the material box 3 during the conveying process and prevent the material box 3 from deviating. The end of the third baffle 201 facing the circular base plate 101 is provided with a second notch 2011. The bottom height of the second notch 2011 matches the top height of the conveyor belt 2 to prevent the material box 3 from entering the receiving mechanism 1 and blocking the rotation of the material box 3 at the end of the third baffle 201 near the receiving mechanism 1.

[0032] Specifically, the horizontal linear mechanism 7 can be selected from linear cylinders or hydraulic cylinders. In one embodiment, see [reference needed]. Figure 1 The horizontal linear mechanism 7 includes a horizontal slide table 702, a slider 701, a second lead screw 704, and a third motor 705. The slider 701 is slidably connected to the horizontal slide table 702, and the second lead screw 704 is threadedly connected to the slider 701. Both ends of the horizontal slide table 702 are provided with second fixing plates 703. The second lead screw 704 is rotatably connected between a pair of second fixing plates 703. The output shaft of the third motor 705 is connected to one end of the second lead screw 704. The slider 701 is moved by the second lead screw 704, making it easier to adjust the moving distance of the rotating shaft 6 and the connecting column 102.

[0033] Preferred options, please refer toFigure 1 The connecting column 102 has a circular top plate 104 at its top. The top of the rotating shaft 6 extends through the top of the circular top plate 104. Multiple strip-shaped slots 1041 are arranged in a circumferential array on the circular top plate 104. These slots 1041 are positioned directly above the receiving cavities 1031 formed within multiple pairs of first baffles 103. The width of the strip-shaped slots 1041 matches the width of the push plate 401, and one end of the strip-shaped slot 1041 extends inward to the periphery of the connecting column 102, while the other end extends outward. Both ends extend outward from the periphery of the circular top plate 104. When the receiving cavities 1031 in the two pairs of second baffles 105 rotate to be directly below the two push plates 401, the two strip-shaped through slots 1041 directly above the two receiving cavities 1031 are respectively aligned with the two push plates 401. After the push plates 401 move downward, they will enter the strip-shaped through slots 1041. Because the widths of the two are matched, the strip-shaped through slots 1041 can restrict the movement direction of the push plates 401 and improve the stability of the push plates 401 during horizontal movement.

[0034] For details, please refer to Figure 3 The bottom of the connecting column 102 is provided with a gear ring 803. The rotating mechanism includes a second motor 8 and a gear 801. The output shaft of the second motor 8 is connected to the gear 801. The gear 801 meshes with the gear ring 803. The second motor 8 is connected to the rotating shaft 6 through a fixed ring 802. By driving the gear 801 to rotate, the gear ring 803 and the connecting column 102 can be driven to rotate. Since the number of teeth of the gear 801 is much smaller than the number of teeth of the gear ring 803, the angle adjustment accuracy of the connecting column 102 can be higher.

[0035] Preferred options, please refer to Figures 3-4 The circular base plate 101 has multiple third notches 1011 arranged in a circumferential array on its periphery. The multiple third notches 1011 are located directly below multiple receiving cavities 1031. Multiple sets of first rotating rollers 106 are provided in the multiple third notches 1011. The two ends of the first rotating rollers 106 are rotatably connected to the side walls of the third notches 1011, and the axial direction of the first rotating rollers 106 is perpendicular to the corresponding first baffles 103. When the material box 3 is conveyed into the receiving cavity 1031 from the conveyor belt 2, the first rotating rollers 106 can rotate, reducing the friction on the bottom of the material box 3, making it easier for the material box 3 to enter the receiving cavity 1031 from the conveyor belt.

[0036] For further optimization, please refer to Figures 3-5The third notch 1011 has a mounting base 107 at one end away from the connecting column 102. The top height of the mounting base 107 is lower than the top height of the first roller 106, so that the material box 3 does not rub against the mounting base 107 when it enters the receiving cavity 1031. The top of the mounting base 107 has a vertical groove 1071 with a downward opening, and a vertically movable stop 108 is provided in the groove 1071. Specifically, the position of the stop block 108 is set so that when the material box 3 is fully entered into the receiving cavity 1031, the stop block 108 is in the first notch 301 of the material box 3, which is used to block the material box 3 and prevent the material box 3 from sliding out of the receiving cavity 1031 due to the centrifugal force generated during the rotation of the connecting column 102 during the conveying process. Specifically, the stop block 108 can be driven to rise and fall by setting a driving device. When the material box 3 is input into the receiving cavity 1031 or when it is necessary to push the material box 3 out of the receiving cavity 1031, the stop block 108 is controlled to fall. After the material box 3 is fully entered into the receiving cavity 1031, the stop block 108 is controlled to rise. More specifically, the distance between the circular top plate 104 and the first rotating roller 106 can be set to match the height of the material box 3. After the material box 3 enters the receiving cavity 1031, the height of the top of the material box 3 matches the height of the bottom of the circular top plate 104, so that when the material box 3 abuts against the stop block 108 during rotation, the circular top plate 104 can restrict the material box 3 from rotating upward with the stop block 108 as the fulcrum due to centrifugal force.

[0037] For details, please refer to Figures 4-6 The top of the stop 108 has a first inclined surface 1081 that slopes upward toward the connecting post 102. A pair of vertically arranged first springs 1083 are connected to the walls on both sides of the slide groove 1071. The top of the first springs 1083 is connected to the two sides of the stop 108 through a pair of first lugs 1085. The first springs 1083 are used to provide an upward thrust to the stop 108 that retracts downward into the slide groove 1071. A rectangular block 1082 is vertically connected to the bottom of the side of the stop 108 near the connecting post 102. A fourth notch 1072 communicating with the slide groove 1071 is opened at the bottom of the inner side of the mounting base 107. The rectangular block 1082 is located in the fourth notch 1072. The rectangular block 1082 and the stop 108 can be driven to move up and down by setting a driving device at the fourth notch 1072.

[0038] For more details, please refer to Figures 7-10A pair of slide rails 11 are radially arranged between multiple mounting bases 107 and connecting columns 102 along the circular base plate 101. A first push rod 10 is slidably connected within the pair of slide rails 11. The end of the first push rod 10 near the mounting base 107 has a second inclined surface 1001 that slopes upward toward the mounting base 107. When the first spring 1083 is in its natural state, the first inclined surface 1081 extends beyond the top of the slide groove 1071. The top of the first inclined surface 1081 is higher than the top height of the first roller 106, and the top height of the second inclined surface 1001 is equal to that of the rectangular... The top height of block 1082 is matched; a vertical through groove is provided in the middle of the side of the second baffle 105 away from the connecting post 102, and a second push rod 9 is slidably connected in the vertical through groove. The bottom of the second push rod 9 has a third inclined surface 901 that slopes downward toward the connecting post 102. The other end of the first push rod 10 is within the vertical coverage area of ​​the third inclined surface 901. The tops of both sides of the second push rod 9 are connected to one end of two second springs 903 through a pair of second lugs 902. The other end of the second springs 903 is connected to the top of the corresponding second baffle 105. When the second spring 903 is in its natural state, there is a preset distance between the top of the third inclined surface 901 and the top of the first push rod 10, so that the first push rod 10 is not pushed towards the mounting base 107 by the third inclined surface 901. The stop block 108 will be in a state of protruding from the top of the slide groove 1071 under the support of the first spring 1083. At this time, if the material box 3 is pushed into the receiving cavity 1031, the bottom of the material box 3 will first abut against the first inclined surface 1081, and then push the stop block 108 downward by its own weight. After the material box 3 is fully inserted into the receiving cavity 1031, the stop block 108 is below the first notch 301 of the material box 3. The first spring 1083 will push the stop block 108 upward into the first notch 301 to prevent the material box 3 from sliding out. When it is necessary to push the material box 3 out... When the receiving cavity 1031 is in use, the push plate 401 moves downward under the drive of the lifting mechanism 5, which pushes the second push rod 9 downward to its maximum extent. At this time, the third inclined surface 901 pushes the first push rod 10 towards the mounting base 107, so that the second inclined surface 1001 on the first push rod 10 pushes the rectangular block 1082 downward, thereby moving the top of the stop block 108 into the slide groove 1071, so that the material box 3 in the receiving cavity 1031 will not be blocked when it is pushed out by the push plate 401. After the push plate 401 moves upward, the second push rod 9 will move upward under the push of the second spring 903. The first spring 1083 will also push the stop block 108 and the rectangular block 1082 upward. The rectangular block 1082 will push the first push rod 10 towards the connecting column 102 through the second inclined surface 1001.

[0039] For more details, please refer to Figure 5 The first lug 1085 is slidably connected to a pair of first guide posts 1084. The first spring 1083 is sleeved on the outside of the first guide posts 1084. The bottom of the first guide posts 1084 can be fixed to the walls on both sides of the slide groove 1071 by a support component, so that the stop block 108 moves up and down more stably. (See reference...)Figure 10 The second guide post 904 is provided on the upper part of the second baffle 105, the second spring 903 is passed through the second guide post 904, and the second lug 902 is slidably connected to the second guide post 904 so that the second push rod 9 moves up and down more stably.

[0040] Preferred options, please refer to Figure 9 Each push rod 10 has a first connecting plate 1002 at its bottom, and each slide rail 11 has a second connecting plate 1101 at its bottom. A third spring 1003 is provided between the first connecting plate 1002 and the second connecting plate 1101. When the top height of the second inclined surface 1001 matches the top height of the rectangular block 1082, the third spring 1003 is in its natural state. When the first push rod 10 is pushed towards the mounting base 107 by the second push rod 9 until the second inclined surface 1001 is above the rectangular block 1082, the third spring 1003 will be pulled to a stretched state. After the second push rod 9 returns to its original position, the third spring 1003 will apply a pulling force to the first push rod 10 to assist the first pull rod in returning to its original position, thus preventing the first pull rod from being stuck and the first pull rod from being unable to return to its original position by the pushing force of the first spring 1083 alone.

[0041] For details, please refer to Figure 10 The bottom of each push plate 401 is rotatably connected to a second roller 402. The rotation axis of the second roller 402 is parallel to the width direction of the push plate 401. The bottom height of the second roller 402 is lower than the bottom height of the push plate 401. During the downward movement of the push plate 401, it will abut against the second baffle 105 through the second rotating shaft 6. During the outward movement of the push plate 401, the friction between it and the top of the second baffle 105 can be reduced, thus reducing wear.

[0042] For details, please refer to Figure 11 In one embodiment, the bidirectional pushing mechanism 4 includes a first lead screw 405, a pair of movable blocks 404, and a first motor 406. The pair of movable blocks 404 are slidably connected within a transverse U-shaped frame 407. The first lead screw 405 has two threaded sections with opposite directions of rotation. The two movable blocks 404 are threadedly connected to the two threaded sections respectively. The U-shaped frame 407 has first fixing plates 403 at both ends. The two ends of the first lead screw 405 are rotatably connected to the two first fixing plates 403. The output shaft of the first motor 406 is connected to one end of the first lead screw 405. A pair of push plates 401 are connected to the bottom of the pair of movable blocks 404. The telescopic end of the lifting mechanism 5 is connected to the U-shaped frame 407. When the first motor 406 drives the first lead screw 405 to rotate, the two threaded sections with opposite directions of rotation on the first lead screw 405 will drive the pair of movable blocks 404 and the pair of push plates 401 to move synchronously in opposite directions, which facilitates control of the push distance of the push plates 401.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to be the only or limiting of the invention. Those skilled in the art should understand that various changes or equivalent substitutions made to the present invention without departing from its scope are all within the protection scope of the present invention.

Claims

1. A semiconductor lead frame cassette conveying device, characterized in that, include: The receiving mechanism (1) includes a connecting column (102) and a circular base plate (101) sleeved on the bottom of the periphery of the connecting column (102). The periphery of the connecting column (102) is provided with an even number of pairs of vertical first baffles (103) arranged in a circular array. The space between each pair of first baffles (103) forms a receiving cavity (1031). A second baffle (105) is provided in the receiving cavity (1031), and its top height is lower than the top height of the first baffle (103). The connecting column (102) is rotatably connected to a rotating shaft (6). The top of the rotating shaft (6) passes through the top of the connecting column (102). The connecting column (102) is driven to rotate by a rotating mechanism. The two-way pushing mechanism (4) has two pushing ends connected to two vertical push plates (401) respectively. The top of the two-way pushing mechanism (4) is connected to the telescopic end of a lifting mechanism (5). The lifting mechanism (5) is fixed to the top of the rotating shaft (6) by a support frame (501). The conveyor belt (2) is located on one side of the circular base plate (101), and its conveying direction is parallel to the diameter of the circular base plate (101). It is used to convey the material box (3) into the accommodating cavity (1031). A horizontal linear mechanism (7) is spaced below a circular base plate (101), and its movable end is connected to the bottom of a rotating shaft (6).

2. The semiconductor lead frame cassette conveying device according to claim 1, characterized in that, The top of the connecting column (102) is provided with a circular top plate (104), and the top of the rotating shaft (6) extends through the top of the circular top plate (104). Multiple strip-shaped through slots (1041) are arranged in a circumferential array on the circular top plate (104). The multiple strip-shaped through slots (1041) are located directly above the multiple receiving cavities (1031). The width of the strip-shaped through slots (1041) matches the width of the push plate (401). The inner end of the strip-shaped through slots (1041) extends to the periphery of the connecting column (102), and the outer end of the strip-shaped through slots (1041) extends out of the periphery of the circular top plate (104).

3. The semiconductor lead frame cassette conveying device according to claim 1, characterized in that, Both sides of the conveyor belt (2) are provided with a third baffle (201). The end of the third baffle (201) facing the circular bottom plate (101) is provided with a second notch (2011). The bottom height of the second notch (2011) matches the top height of the conveyor belt (2).

4. The semiconductor lead frame cassette conveying device according to claim 1, characterized in that, The circular base plate (101) has multiple third notches (1011) arranged in a circular array around its periphery. The multiple third notches (1011) are located directly below multiple accommodating cavities (1031). Multiple first rollers (106) are rotatably connected to both walls of the third notches (1011). The first rollers (106) are axially perpendicular to the first baffle (103) of the accommodating cavity (1031) in which they are located.

5. A semiconductor lead frame cassette conveying device according to claim 4, characterized in that, The third notch (1011) has a mounting base (107) at one end away from the connecting column (102). The top height of the mounting base (107) is lower than the top height of the first roller (106). The top of the mounting base (107) has a vertical groove (1071) opening downwards. The groove (1071) has a vertically movable stop (108).

6. The semiconductor lead frame cassette conveying device according to claim 5, characterized in that, The top of the stop block (108) has a first inclined surface (1081) that slopes upward toward the connecting post (102). A pair of vertically arranged first springs (1083) are connected to the walls on both sides of the slide groove (1071). The top of the first springs (1083) is connected to both sides of the stop block (108) through a pair of first lugs (1085). A rectangular block (1082) is vertically connected to the bottom of the side of the stop block (108) near the connecting post (102). A fourth notch (1072) communicating with the slide groove (1071) is opened at the bottom of the inner side of the mounting base (107). The rectangular block (1082) is located in the fourth notch (1072).

7. A semiconductor lead frame cassette conveying device according to claim 6, characterized in that, A pair of slide rails (11) are provided radially along the circular base plate (101) between multiple mounting seats (107) and connecting columns (102). A first push rod (10) is slidably connected in the pair of slide rails (11). The end of the first push rod (10) facing the mounting seat (107) has a second inclined surface (1001) that is inclined upward toward the mounting seat (107). When the first spring (1083) is in its natural state, the first inclined surface (1081) extends out of the top of the groove (1071). The top of the first inclined surface (1081) is higher than the top height of the first roller (106), and the top height of the second inclined surface (1001) matches the top height of the rectangular block (1082). A vertical through groove is provided in the middle of the side of the second baffle (105) away from the connecting post (102). A second push rod (9) is slidably connected in the vertical through groove. The bottom of the second push rod (9) has a third inclined surface (901) that slopes downward toward the connecting post (102). The other end of the first push rod (10) is within the vertical coverage area of ​​the third inclined surface (901). The tops of both sides of the second push rod (9) are connected to one end of two second springs (903) through a pair of second lugs (902). The other end of the second springs (903) is connected to the corresponding first spring. The top of the two baffles (105) are connected. When the second spring (903) is in its natural state, there is a preset distance between the top of the third inclined surface (901) and the top of the first push rod (10). When the lifting mechanism (5) pushes the second push rod (9) down to the maximum extent through the push plate (401), the third inclined surface (901) pushes the first push rod (10) to move toward the mounting seat (107), and the second inclined surface (1001) pushes the rectangular block (1082) down to the top of the stop block (108) and retracts it into the slide groove (1071).

8. A semiconductor lead frame cassette conveying device according to claim 7, characterized in that, The bottom of the first push rod (10) is provided with a first connecting plate (1002), and the bottom of the slide rail (11) is provided with a second connecting plate (1101). A third spring (1003) is provided between the first connecting plate (1002) and the second connecting plate (1101). When the top height of the second inclined surface (1001) matches the top height of the rectangular block (1082), the third spring (1003) is in a natural state.

9. A semiconductor lead frame cassette conveying device according to claim 7, characterized in that, The bottom of each push plate (401) is rotatably connected to a second roller (402), and the rotation axis of the second roller (402) is parallel to the width direction of the push plate (401).

10. A semiconductor lead frame cassette conveying device according to claim 1, characterized in that, The bidirectional pushing mechanism (4) includes a first lead screw (405), a pair of movable blocks (404), and a first motor (406). The pair of movable blocks (404) are slidably connected in a transverse U-shaped frame (407). The first lead screw (405) has two threaded sections with opposite directions of rotation. The two movable blocks (404) are threadedly connected to the two threaded sections respectively. The U-shaped frame (407) is provided with first fixing plates (403) at both ends. The two ends of the first lead screw (405) are rotatably connected to the two first fixing plates (403). The output shaft of the first motor (406) is connected to one end of the first lead screw (405). A pair of push plates (401) are connected to the bottom of the pair of movable blocks (404). The telescopic end of the lifting mechanism (5) is connected to the U-shaped frame (407).

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