Lead frame pushing mechanism

Abstract

The utility model provides a lead frame pushing mechanism which comprises a horizontally arranged supporting table provided with two parallel strip-shaped holes. A sliding plate is arranged below the supporting table, and shifting rods are arranged at the two ends of the top face of the sliding plate and located in the projection range of the strip-shaped holes. Side plates are arranged on the two sides of the bottom face of the supporting table, supporting strips are arranged on the opposite sides of the side plates, rotating strips are hinged to the front ends of the supporting strips, check blocks are arranged on the side plates corresponding to the lower portions of the rotating strips, and inclined plates inclining upwards are arranged on the side plates corresponding to the front ends of the supporting plates. A push plate movably arranged in the length direction is arranged below the supporting table, a guide rod perpendicular to the top face of the supporting table is arranged on the top face of the push plate, the push plate is arranged at the movable end of a telescopic device, the guide rod upwards penetrates through the sliding plate above, and a gap is formed between the top face of the guide rod and the bottom face of the supporting table. According to the scheme, the limiting and pushing functions can be achieved at the same time, and the overall structure is simple.

Description

Technical Field

[0001] The utility model belongs to the technical field of lead frame transfer devices, and in particular relates to a lead frame pushing mechanism. Background Art

[0002] Semiconductor devices are mainly manufactured using lead frames as carriers. During the manufacturing process, the lead frames often need to be transferred and transported between different equipment and workstations. In order to control the output timing of the lead frames during the transportation process, it is usually necessary to set a blocking structure to resist the lead frames and set a pushing mechanism to push the lead frames out. As a result, the overall structure of the existing transfer device is relatively complex, and multiple driving elements need to be set to achieve the above functions, which also makes the control logic of the device more complex and the failure rate higher. Utility Model Content

[0003] In order to solve the deficiencies in the prior art, the utility model provides a lead frame pushing mechanism, which can simultaneously realize the limiting and pushing functions and has a simple overall structure.

[0004] In order to achieve the purpose of this utility model, the following scheme is proposed:

[0005] A lead frame pushing mechanism comprises: a horizontally arranged supporting platform, which is provided with two mutually parallel strip holes, and the length direction of the strip holes is consistent with the length direction of the supporting platform.

[0006] A slide plate is provided under the support platform, which is perpendicular to the strip hole. The slide plate is movable along the length direction of the strip hole. Both ends of the top surface of the slide plate are provided with levers perpendicular to the top surface of the support platform. The levers are respectively located within the projection range of the strip holes on both sides of the support platform on the bottom surface of the support platform.

[0007] Two side panels perpendicular to the top surface of the support platform are symmetrically arranged on both sides in the width direction of the bottom surface of the support platform, and the two side panels are parallel to each other. Support strips parallel to the strip holes are arranged on opposite sides of the side panels, and the support strips are located in the middle of the side panels in the height direction, and the front end of the support strips is located in the middle of the strip holes, and the rear end of the support strips extends toward the rear end of the support platform, and a rotating strip is hinged at the front end of the support strip, and the rotating axis is perpendicular to the side panels. A stopper is arranged below the side panels corresponding to the rotating strip, and when the rotating strip is supported on the top surface of the stopper, the top surface of the rotating strip is flush with the top surface of the support strip; support plates parallel to the support strips are arranged below the side panels corresponding to the support strips, and an inclined plate inclined upward is arranged at the front end of the side panels corresponding to the support strips.

[0008] The thickness of the slide plate is smaller than the distance between the top surface of the support bar and the bottom surface of the support platform, and between the bottom surface of the support bar and the top surface of the support plate; the length of the slide plate is smaller than the distance between the two side plates, and larger than the distance between the support bars on both sides and the rotating bar; when the top surface of the rotating bar is flush with the top surface of the support bar, the distance from the intersection of the extended trajectory of the rotating bar and the inclined plate to the front end of the rotating bar is smaller than the width of the slide plate.

[0009] A push plate is provided below the support platform and is movable along the length direction. A guide rod is provided on its top surface and is perpendicular to the top surface of the support platform. The push plate is provided at the movable end of a telescopic device. The guide rod passes upward through the upper slide plate. There is a gap between the top surface of the guide rod and the bottom surface of the support platform.

[0010] The beneficial effect of the utility model is that the solution can simultaneously achieve the purpose of limiting and pushing the lead frame by using the same mechanism, and a telescopic device is integrally arranged as a driving element, the structure is simpler, and the failure rate is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.

[0012] Figure 1 A schematic diagram of the top structure of the support platform of the present application is shown.

[0013] Figure 2 A cross-sectional view of the present application is shown when receiving a lead frame.

[0014] Figure 3 A schematic structural diagram of the bottom of the support platform when receiving a lead frame is shown.

[0015] Figure 4 A schematic diagram of the structure of the bottom of the support platform is shown during the movement of the slide plate toward the front end of the rotating bar.

[0016] Figure 5 The figure shows the structure schematic diagram of the bottom of the support platform when the lead frame is pushed.

[0017] Figure 6 A cross-sectional view of the present application is shown when the lead frame is pushed.

[0018] Markings in the figure: support platform -1, strip hole -11, slide plate -2, lever -21, side plate -3, support bar -31, rotating bar -32, stopper -33, support plate -34, inclined plate -35, push plate -4, guide rod -41, cylindrical spring -42, telescopic device -5. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings, but the embodiments described in the utility model are only part of the embodiments of the utility model, rather than all the embodiments.

[0020] like Figures 1 to 6 As shown, a lead frame pushing mechanism comprises: a horizontally arranged support platform 1 , which is provided with two parallel strip holes 11 , whose length direction is consistent with the length direction of the support platform 1 .

[0021] A slide plate 2 is provided under the support platform 1, which is perpendicular to the strip hole 11. The slide plate 2 is movably arranged along the length direction of the strip hole 11. Both ends of the top surface of the slide plate 2 are provided with levers 21 perpendicular to the top surface of the support platform 1. The levers 21 are respectively located within the projection range of the strip holes 11 on both sides of the support platform 1 on the bottom surface of the support platform 1.

[0022] Two side panels 3 perpendicular to the top surface of the support platform 1 are symmetrically provided on both sides of the width direction of the bottom surface of the support platform 1, and the two side panels 3 are parallel to each other. A support bar 31 parallel to the strip hole 11 is provided on the opposite side of the side panel 3. The support bar 31 is located in the middle of the side panel 3 in the height direction, and the front end of the support bar 31 is located in the middle of the strip hole 11. The rear end of the support bar 31 extends toward the rear end of the support platform 1. The front end of the support bar 31 is hinged with a rotating bar 32, and the rotation axis is perpendicular to the side panel 3. A stopper 33 is provided below the side panel 3 corresponding to the rotating bar 32. When the rotating bar 32 is supported on the top surface of the stopper 33, the top surface of the rotating bar 32 is flush with the top surface of the support bar 31; a support plate 34 parallel to the support bar 31 is provided below the side panel 3 corresponding to the support bar 31, and an inclined plate 35 inclined upward is provided at the front end of the side panel 3 corresponding to the support plate 34.

[0023] The thickness of the slide plate 2 is smaller than the distance between the top surface of the support bar 31 and the bottom surface of the support platform 1, and between the bottom surface of the support bar 31 and the top surface of the support plate 34; the length of the slide plate 2 is smaller than the distance between the two side plates 3, and larger than the distance between the support bars 31 on both sides and the rotating bar 32; when the top surface of the rotating bar 32 is flush with the top surface of the support bar 31, the distance from the intersection of the extended trajectory of the rotating bar 32 and the inclined plate 35 to the front end of the rotating bar 32 is smaller than the width of the slide plate 2.

[0024] A push plate 4 is provided below the support platform 1 and is movable along the length direction. A guide rod 41 is provided on its top surface and is perpendicular to the top surface of the support platform 1. The push plate 4 is provided at the movable end of a telescopic device 5. The guide rod 41 passes upward through the upper slide plate 2. There is a gap between the top surface of the guide rod 41 and the bottom surface of the support platform 1.

[0025] This solution has two main usage states, including receiving and pushing materials;

[0026] like Figure 2 , Figure 3 As shown, when receiving the materials, the two ends of the slide plate 2 slide to the top surface of the rear end of the support bar 31. At this time, the lever 21 protrudes from the top surface of the support platform 1 and is closely located at the rear end of the support platform 1. At this time, the lead frame input from the front end of the support platform 1 is limited by the lever 21 to fix the stop position of the lead frame and prevent the lead frame from sliding to the rear end of the support platform 1 under the action of inertia.

[0027] like Figures 4 to 6 As shown, before pushing the material, the lever 21 needs to be moved to the front end of the support platform 1. The specific process is as follows: the push plate 4 is moved toward the rear end of the support platform 1, and the guide rod 41 will push the slide plate 2 to move toward the rear end of the support platform 1. When the slide plate 2 is completely moved away from the rear end of the support bar 31, the slide plate 2 will automatically fall onto the support plate 34 along the guide rod 41 under the action of gravity. Because of the restriction of the guide rod 41, the slide plate 2 can move up and down in parallel; then the push plate 4 is used to push the slide plate 2 toward the front end of the support platform 1. When the lower edge of the front end of the slide plate 2 contacts the inclined plate 35, the slide plate 2 will move obliquely along the inclined plate 35 toward the upper side of the front end of the support platform 1, and During the movement, the top edge of the rear end of the slide plate 2 will push the rotating bar 32 to swing upward. After the slide plate 2 passes over the rotating bar 32, the rotating bar 32 will automatically fall down under the action of gravity and be supported on the stopper 33 again. Because when the top surface of the rotating bar 32 is flush with the top surface of the support bar 31, the distance between the intersection of the extended trajectory of the rotating bar 32 and the inclined plate 35 to the front end of the rotating bar 32 is less than the width of the slide plate 2. Therefore, when the rotating bar 32 is supported on the stopper 33 again, the slide plate 2 will be located above the rotating bar 32, and at this time the lever 21 will protrude from the top surface of the support platform 1 and be located on the side of the lead frame facing the front of the support platform 1.

[0028] After completing the above steps, the lead frame can be pushed to the rear of the support platform 1 . During the pushing process, the push plate 4 drives the slide plate 2 to move to the rear of the support platform 1 , thereby pushing the lead frame to the rear of the support platform 1 .

[0029] Preferably, Figure 2 As shown, the guide rods 41 are sleeved with cylindrical springs 42, which are located below the slide plate 2. When the bottom surfaces at both ends of the slide plate 2 are in contact with the top surface of the support plate 34, the cylindrical springs 42 are in a compressed state. When the slide plate 2 falls from the rear end of the support bar 31, the cylindrical springs 42 can be used to provide buffering support for the slide plate 2 to reduce the impact of the slide plate 2 when it falls and the vibration caused to the entire pushing mechanism.

[0030] Preferably, the telescopic device 5 is a linear motor or a cylinder, such as Figure 2 As shown, the telescopic device 5 is arranged at the front end or the rear end below the support platform 1 .

[0031] Preferably, Figure 1As shown, three levers 21 are provided at both ends of the slide plate 2, and one lever 21 is provided at each end of the slide plate 2 and is located in the middle of the width direction of the slide plate 2, and the distance between the two levers 21 is less than the length of the lead frame, that is, the two levers 21 are used to contact the side of the lead frame to achieve the function of limiting and pushing the lead frame; the other two levers 21 at both ends of the slide plate 2 are respectively located on both sides of the width direction of the slide plate 2, and the distance between the levers 21 on the same side of the two ends of the slide plate 2 is greater than the length of the lead frame, which is used to limit the position of the lead frame in the length direction.

[0032] Preferably, Figures 2 to 6 As shown, rollers are provided at the bottom of both ends of the slide plate 2 to reduce the friction between the slide plate 2 and the support bar 31 , the rotating bar 32 and the support plate 34 , thereby improving the smoothness of the movement of the slide plate 2 .

[0033] The above is only a preferred embodiment of the utility model, and does not mean that it is the only one or limit the utility model. Those skilled in the art should understand that various changes or equivalent replacements made to the utility model without departing from the scope of the utility model are within the scope of protection of the utility model.

Claims

1. A lead frame pushing mechanism, characterized in that: include: A horizontally arranged support platform (1) is provided with two parallel strip-shaped holes (11), the length direction of which is consistent with the length direction of the support platform (1); A slide plate (2) is provided below the support platform (1) and is perpendicular to the strip hole (11). The slide plate (2) is movably arranged along the length direction of the strip hole (11). Both ends of the top surface of the slide plate (2) are provided with levers (21) perpendicular to the top surface of the support platform (1). The levers (21) are respectively located within the projection range of the strip holes (11) on the bottom surface of the support platform (1) on both sides of the support platform (1); Two side panels (3) perpendicular to the top surface of the support platform (1) are symmetrically arranged on both sides of the bottom surface of the support platform (1) in the width direction, and the two side panels (3) are parallel to each other. The opposite sides of the side panels (3) are each provided with a support bar (31) parallel to the strip hole (11). The support bar (31) is located in the middle of the side panel (3) in the height direction. The front end of the support bar (31) is located in the middle of the strip hole (11). The rear end of the support bar (31) extends toward the rear end of the support platform (1). The front end of the support bar (31) is hinged. A rotating bar (32) is connected, the rotating axis is perpendicular to the side plate (3), a stopper (33) is provided below the side plate (3) corresponding to the rotating bar (32), when the rotating bar (32) is supported on the top surface of the stopper (33), the top surface of the rotating bar (32) is flush with the top surface of the supporting bar (31); a supporting plate (34) parallel to the supporting bar (31) is provided below the side plate (3) corresponding to the supporting bar (31), and an inclined plate (35) inclined upward is provided at the front end of the side plate (3) corresponding to the supporting plate (34); The thickness of the slide plate (2) is smaller than the distance between the top surface of the support bar (31) and the bottom surface of the support platform (1), and between the bottom surface of the support bar (31) and the top surface of the support plate (34); the length of the slide plate (2) is smaller than the distance between the two side plates (3), and larger than the distance between the support bars (31) on both sides and the rotating bar (32); when the top surface of the rotating bar (32) is flush with the top surface of the support bar (31), the distance from the intersection of the extended track of the rotating bar (32) and the inclined plate (35) to the front end of the rotating bar (32) is smaller than the width of the slide plate (2); A push plate (4) is provided below the support platform (1) and is movable in the length direction. A guide rod (41) is provided on the top surface of the push plate (4) and is perpendicular to the top surface of the support platform (1). The push plate (4) is provided at the movable end of a telescopic device (5). The guide rod (41) passes through the upper slide plate (2) upward. There is a gap between the top surface of the guide rod (41) and the bottom surface of the support platform (1).

2. A lead frame pushing mechanism according to claim 1, characterized in that: The guide rods (41) are sleeved with cylindrical springs (42) which are located below the slide plate (2). When the bottom surfaces at both ends of the slide plate (2) are in contact with the top surface of the support plate (34), the cylindrical springs (42) are in a compressed state.

3. The lead frame pushing mechanism according to claim 1, characterized in that: The telescopic device (5) is a linear motor or a cylinder, and the telescopic device (5) is arranged at the front end or the rear end below the support platform (1).

4. The lead frame pushing mechanism according to claim 1, characterized in that: Three levers (21) are provided at both ends of the slide plate (2); one lever (21) is located at the middle of the width direction of the slide plate (2) at each end of the slide plate (2), and the distance between the two levers (21) is less than the length of the lead frame; the other two levers (21) are located at both ends of the slide plate (2) on both sides of the width direction of the slide plate (2), and the distance between the levers (21) on the same side of the two ends of the slide plate (2) is greater than the length of the lead frame, so as to limit the position of the lead frame in the length direction.

5. The lead frame pushing mechanism according to claim 1, characterized in that: Rollers are provided at the bottoms of both ends of the slide plate (2).

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