Clamping mechanism of high-density integrated circuit lead frame

Abstract

The utility model relates to the technical field of lead frame clamping structures, in particular to a clamping mechanism of a high-density integrated circuit lead frame, which comprises a supporting rod, two rotating cylinders which are rotatably arranged on the supporting rod and are arranged in parallel, and clamping pieces which are respectively fixed on the two rotating cylinders, and the supporting rod is provided with a limiting piece to limit the axial displacement of the rotating cylinders; the supporting rod is provided with an opening and closing driving module used for driving the two rotating cylinders to rotate in opposite directions so as to drive the clamping pieces of the two rotating cylinders to get close to clamp the lead frame or get away from each other to loosen the lead frame. Compared with the prior art, according to the novel taking and placing structure of the lead frame, the opening and closing driving module drives the two rotating cylinders to rotate in the opposite directions during material clamping, and then the clamping pieces on the two rotating cylinders are driven to be close to each other to clamp the lead frame. And when the clamped lead frame needs to be loosened, the operation is carried out reversely in the same way. The clamping mechanism provides possibility for actual rotary feeding equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of lead frame clamping structure, specifically relates to the clamping mechanism of high density integrated circuit lead frame. BACKGROUND

[0002] The lead frame is an important carrier in the packaging process of semiconductor integrated chips, is an important bridge connecting internal circuits and external leads, is a key structural member for realizing the electrical connection between the lead-out end of the internal circuit of the chip and the external lead by means of bonding material (gold wire, aluminum wire, copper wire), and forms an electrical circuit. It plays a bridge role of connecting with external wires, and most semiconductor integrated blocks need to use lead frames, which are important basic materials in the electronic information industry.

[0003] The lead frame needs to be fed and discharged in the electroplating process. In the prior art, the lead frame is fed from the horizontal conveying belt (the lead frame is in a horizontal lying posture) to the steel belt conveying belt (the lead frame is in a vertical posture), or vice versa, which is realized by a turnover mechanism. Therefore, the applicant previously developed a turnover transfer mechanism for clamping integrated circuit lead frames disclosed in the Chinese patent document with publication number CN219216591U. The turnover transfer mechanism includes a clamping pad plate in contact with one side of the lead frame, the clamping pad plate is provided with a clamping assembly for clamping the edge of the lead frame, the clamping assembly includes a rotating part and a plurality of clamping claws, the clamping pad plate is provided with a sliding part for installing the rotating part and a sliding guide for adjusting the position of the clamping claw. When clamping, the clamping pad plate is in contact with the contact surface of the lead frame, the rotating part of the clamping assembly drives the clamping claw to turn over, and the end thereof abuts against the bottom edge of the lead frame, so that the lead frame is attached to the bottom of the clamping pad plate. On the one hand, it does not contact the electroplating area on the bottom surface of the lead frame, which can prevent damage caused by abrasion. On the other hand, the lead frame does not bend during clamping, which can reduce the damage caused by bending deformation, effectively protect the lead frame, and facilitate clamping and conveying.

[0004] The applicant has developed a rotary feeding equipment (not yet disclosed), and the above clamping method cannot meet the clamping requirements any more, so a new lead frame clamping mechanism is urgently needed. SUMMARY

[0005] In view of the above technical problems existing in the prior art, the utility model provides a clamping mechanism for high-density integrated circuit lead frames.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] The clamping mechanism of the high-density integrated circuit lead frame comprises a support rod, two parallel arranged rotating drums rotatably mounted on the support rod, and clamping pieces fixed on the two rotating drums respectively, the support rod is provided with a limiting piece to limit the axial displacement of the rotating drum; the support rod is provided with a closing and opening driving module for driving the two rotating drums to rotate in opposite directions, so as to drive the clamping pieces of the two rotating drums to approach or separate to clamp or release the lead frame.

[0008] As a further optional solution, the support rod comprises a first rod body and a second rod body arranged in parallel and fixed to each other, and the two rotating drums are rotatably mounted on the first rod body and the second rod body respectively via bearings.

[0009] As a further optional solution, the support rod is fixed with a bearing seat, and the closing and opening driving module is mounted on the bearing seat.

[0010] As a further optional solution, the closing and opening driving module comprises a closing and opening driving finger air cylinder and a connecting rod transmission group, the cylinder barrel of the closing and opening driving finger air cylinder is fixed on the bearing seat, the connecting rod transmission group comprises a plurality of rod segments connected in sequence, and the first and last rod segments are fixedly connected with the output shaft of the closing and opening driving finger air cylinder and the rotating drum respectively.

[0011] As a further optional solution, the number of the closing and opening driving modules is two or more, the bearing seat is provided with a shunt seat, the shunt seat is provided with an air inlet converging channel, an air outlet converging channel, two or more air inlet shunt channels and two or more air outlet shunt channels, each air inlet shunt channel is connected with the air inlet converging channel, and each air outlet shunt channel is connected with the air outlet converging channel; the air outlet end of the external air source is connected with the air inlet ends of the closing and opening driving finger air cylinders of the two or more closing and opening driving modules via the air inlet converging channel and the air inlet shunt channels; the air inlet end of the external air source is connected with the air outlet ends of the closing and opening driving finger air cylinders of the two or more closing and opening driving modules via the air outlet converging channel and the air outlet shunt channels.

[0012] As a further optional solution, the clamping piece comprises a piece body and a plurality of clamping strips integrally extended from the piece body and arranged in parallel, and the clamping strips of the clamping pieces on the two rotating drums are arranged in one-to-one alignment.

[0013] As a further optional solution, each clamping strip is sleeved with a soft protective sleeve.

[0014] As a further optional solution, the piece body is bent, and the piece bodies of the clamping pieces of the two rotating drums are bent towards each other.

[0015] As a further optional solution, the outer side of the rotating drum is provided with a concave plane, and the piece body is fixedly attached to the concave plane.

[0016] As a further optional solution, the outer side of the support rod is sleeved with a reset spring, and after the support rod is driven to move axially by an external force, the reset spring drives it to reset.

[0017] The utility model discloses a beneficial effect:

[0018] The utility model discloses a high density integrated circuit lead frame's clamping mechanism compares with prior art, to the novel taking and placing structure of lead frame, when clamping, the opening and closing drive module drives two rotary drums to rotate to opposite direction, and then drives the clamping piece on two rotary drums to be close to the clamping lead frame. When needing to loosen the lead frame that is clamped, the reverse operation can be carried out according to the same principle. The clamping mechanism provides the possibility for the rotary type feeding equipment in actual operation. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structural diagram of the clamping mechanism of high density integrated circuit lead frame in the embodiment.

[0020] Figure 2 It is the schematic diagram of single rotary drum and its clamping piece in the embodiment.

[0021] Figure 3 It is the exploded view of the clamping mechanism of high density integrated circuit lead frame in the embodiment.

[0022] Figure 4 It is the structural schematic diagram of single set of opening and closing drive module in the embodiment.

[0023] Figure 5 It is the schematic diagram of two rotary drums and its clamping piece in the embodiment.

[0024] Figure 6 It is the sectional view of the shunt seat in the embodiment.

[0025] Reference Signs:

[0026] Supporting rod 11, first rod body 111, second rod body 112;

[0027] Rotary drum 12, inner concave plane 121;

[0028] Opening and closing drive module 13, opening and closing drive finger air cylinder 131, connecting rod transmission group 132;

[0029] Bearing seat 14, limiting piece 15;

[0030] Clamping piece 16, piece body 161, clamping strip 162, protective sleeve 163;

[0031] Shunt seat 17, air inlet and outlet runner 171, 172, air inlet and outlet shunt 173, 174;

[0032] Reset spring 18. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described in connection with the drawings in the embodiments of the utility model. In the case of no conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0034] The clamping mechanism of the high-density integrated circuit lead frame in the embodiment comprises a support rod 11 and two rotating cylinders 12, the support rod 11 comprises a first rod body 111 and a second rod body 112 arranged side by side and fixed to each other, and the two rotating cylinders 12 are rotatably installed outside the first rod body 111 and the second rod body 112 via bearings. Figures 1 to 6 The support rod 11 is provided with a tensioning and closing driving module 13 for driving the two rotating cylinders 12 to rotate in opposite directions, the support rod 11 is fixed with a bearing seat 14, and the tensioning and closing driving module 13 is installed on the bearing seat 14. The support rod 11 is provided with a limiting piece 15 to limit the axial displacement of the rotating cylinder 12, and the relative positions of the support rod 11, the bearing seat 14 and the rotating cylinder 12 in the axial direction are fixed and unchangeable. The two rotating cylinders 12 are respectively provided with clamping pieces 16, in the use process, the tensioning and closing driving module 13 drives the two rotating cylinders 12 to rotate in opposite directions (one in the clockwise direction and the other in the counterclockwise direction) when clamping, thereby driving the clamping pieces 16 on the two rotating cylinders 12 to approach and clamp the lead frame. When it is needed to loosen the clamped lead frame, the reverse operation can be performed.

[0035] In the embodiment, the tensioning and closing driving module 13 comprises tensioning and closing driving finger air cylinders 131 and connecting rod transmission groups 132, the cylinder barrels of the tensioning and closing driving finger air cylinders 131 are fixed to the bearing seat 14, the connecting rod transmission groups 132 comprise multiple (three in this example) rod segments hinged in sequence, the two output shafts of the tensioning and closing driving finger air cylinders 131 are respectively provided with the connecting rod transmission groups 132, and the first end and the last end of each connecting rod transmission group 132 are respectively fixedly connected with the output shaft of the tensioning and closing driving finger air cylinder 131 and the rotating cylinder 12, and the stroke of the tensioning and closing driving finger air cylinder 131 determines the rotation amplitude of the rotating cylinder 12 and the tensioning and closing degree of the clamping piece 16 in use.

[0036] In the embodiment, the number of the tensioning and closing driving modules 13 is two, and the two tensioning and closing driving modules 13 move synchronously. In order to reduce the use amount of the cylinder pipes, the bearing seat 14 is provided with a shunt seat 17, the shunt seat 17 is provided with an air inlet converging channel 171, an air outlet converging channel 172, two air inlet shunt channels 173 and two air outlet shunt channels 174, each air inlet shunt channel 173 is communicated with the air inlet converging channel 171, and each air outlet shunt channel 174 is communicated with the air outlet converging channel 172. The air outlet end of the external air source is sequentially communicated with the air inlet ends of the tensioning and closing driving finger air cylinders 131 of the two tensioning and closing driving modules 13 via the air inlet converging channel 171 and the air inlet shunt channels 173; and the air inlet end of the external air source is sequentially communicated with the air outlet ends of the tensioning and closing driving finger air cylinders 131 of the two tensioning and closing driving modules 13 via the air outlet shunt channels 174 and the air outlet converging channel 172. The arrangement of the air pipes is more convenient and simple.

[0037] In the embodiment, the clamping piece 16 comprises a piece body 161 and a plurality of clamping strips 162 integrally extended from the piece body 161 and arranged side by side, and the clamping strips 162 of the clamping pieces 16 on the two rotating cylinders 12 are arranged in one-to-one alignment. Each clamping strip 162 is sleeved with a soft protective sleeve 163 to avoid scratching the lead frame. The piece body 161 is bent, and the piece bodies 161 of the clamping pieces 16 of the two rotating cylinders 12 are bent close to each other, so that there is a larger contact area with the lead frame during clamping. The outer side of the rotating cylinder 12 is provided with a concave plane 121, and the piece body 161 is fixed in close contact with the concave plane 121.

[0038] In the embodiment, the outer side of the supporting rod 11 is sleeved with a reset spring 18, and after the supporting rod 11 is driven to move in the axial direction by an external force, the reset spring 18 drives it to reset.

[0039] In the description of the present application, obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0040] Therefore, the above detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0041] In the description of the present application, it should be pointed out that the terms "middle", "upper", "lower", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product is used, and are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used for differentiation and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present application, it should be pointed out that unless otherwise explicitly specified and limited, the terms "provided", "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected. It can be mechanically connected or electrically connected. It can be directly connected or indirectly connected through an intermediate medium. It can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A clamping mechanism for a high density integrated circuit lead frame, characterized by: The support rod (11) is provided with a limiting part (15) to limit the axial displacement of the rotating drum (12); the support rod (11) is provided with a tensioning and closing driving module (13) for driving the two rotating drums (12) to rotate in opposite directions, so as to drive the clamping pieces (16) of the two rotating drums (12) to approach each other to clamp the lead frame or to move away from each other to release the lead frame.

2. The clamping mechanism for high-density integrated circuit lead frames of claim 1 wherein: The support rod (11) comprises a first rod body (111) and a second rod body (112) arranged side by side and fixed to each other, and the two rotating drums (12) are rotatably mounted outside the first rod body (111) and the second rod body (112) via bearings.

3. The clamping mechanism for high density integrated circuit lead frame according to claim 1, wherein: The support rod (11) is fixed with a bearing seat (14), and the tensioning and closing driving module (13) is mounted on the bearing seat (14).

4. The gripper mechanism of a high-density integrated circuit lead frame according to claim 3, wherein: The tensioning and closing driving module (13) comprises a tensioning and closing driving finger air cylinder (131) and a connecting rod transmission group (132), the cylinder barrel of the tensioning and closing driving finger air cylinder (131) is fixed to the bearing seat (14), the connecting rod transmission group (132) comprises a plurality of rod segments connected in sequence, and the first end and the last end of the connecting rod transmission group (132) are fixedly connected with the output shaft of the tensioning and closing driving finger air cylinder (131) and the rotating drum (12) respectively.

5. The gripper mechanism for high density integrated circuit lead frames as recited in claim 4, wherein: The number of the tensioning and closing driving module (13) is two or more, the bearing seat (14) is provided with a shunt seat (17), the shunt seat (17) is provided with an air inlet converging channel (171), an air outlet converging channel (172), two or more air inlet shunt channels (173) and two or more air outlet shunt channels (174), each air inlet shunt channel (173) is communicated with the air inlet converging channel (171), and each air outlet shunt channel (174) is communicated with the air outlet converging channel (172); the air outlet end of the external air source is communicated with the air inlet ends of the tensioning and closing driving finger air cylinders (131) of the two or more tensioning and closing driving modules (13) through the air inlet converging channel (171) and the air inlet shunt channels (173); the air inlet end of the external air source is communicated with the air outlet ends of the tensioning and closing driving finger air cylinders (131) of the two or more tensioning and closing driving modules (13) through the air outlet converging channel (172) and the air outlet shunt channels (174).

6. The gripper mechanism for high density integrated circuit lead frame according to claim 1, wherein: The clamping piece (16) comprises a piece body (161) and a plurality of clamping strips (162) arranged side by side and integrally extended from the piece body (161), and the clamping strips (162) of the clamping pieces (16) on the two rotating drums (12) are arranged in one-to-one alignment.

7. The gripper mechanism for high density integrated circuit lead frames as defined in claim 6 wherein: Each clamping strip (162) is sleeved with a soft protective sleeve (163).

8. The gripper mechanism for high density integrated circuit lead frame according to claim 1, wherein: The piece body (161) is bent, and the piece bodies (161) of the clamping pieces (16) of the two rotating drums (12) are bent close to each other.

9. The gripper mechanism for high density integrated circuit lead frame according to claim 1, wherein: The outer side of the rotating drum (12) is provided with a concave plane (121), and the piece body (161) is fixedly attached to the concave plane (121).

10. The gripper mechanism for high density integrated circuit lead frames as recited in claim 1, wherein: The outer side of the support rod (11) is sleeved with a reset spring (18), and after the support rod (11) is driven to move in the axial direction by an external force, the reset spring (18) drives the support rod (11) to reset.

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