Plastic package mold lead frame capable of changing number of pins

Abstract

The utility model discloses a plastic package mould lead frame capable of changing the number of pins, which comprises a body, a plastic package cavity is fixedly connected above the body, an overflow port is arranged at the lower end in the plastic package cavity, a placing groove is arranged in the body, the lower side of the body is fixedly connected with a fixed pin, and the fixed pin is fixedly connected with the plastic package cavity. And meanwhile, a supporting column is fixedly connected to the body, and the fixing pins are connected into the containing grooves in a nested mode. According to the plastic package mold lead frame capable of replacing the number of the pins, when a pulling plate moves, a limiting rod is synchronously driven by a sleeve rod to move in a limiting groove, the stability of the sleeve rod during moving is further improved, when the sleeve rod moves, a reset spring is synchronously pulled, and when the sleeve rod is not stressed, the reset spring is synchronously pulled, and the sleeve rod is not stressed. The sleeve rod can drive the clamping rod to reset under the driving of the elastic acting force of the reset spring, so that the inner end of the clamping rod enters the clamping groove to limit the nested pin, and the possibility that the nested pin deviates is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lead frames, in particular to a plastic packaging mold lead frame with replaceable pin quantity. Background Art

[0002] The lead frame is a metal sheet made of alloy material. It acts as a lead in electronic products, especially semiconductor integrated circuits, connecting external devices with internal parts. It is also a key component in the production process of integrated circuits. However, some existing lead frames still have certain defects and deficiencies when they are plastic-sealed and need to be improved:

[0003] For example, the plastic-encapsulated split lead frame with application number: CN201320700135.X comprises thirty lead frame units, wherein the lead frame unit comprises a lead head and a lead foot, wherein the lead head and the lead foot are separately connected, wherein the lead foot is provided with a connecting rib, wherein adjacent lead frame units are connected via the connecting rib, wherein the lead head comprises a mounting plate and a heat sink, wherein the mounting plate is provided with a mounting groove, wherein a sealing groove is provided on the outer periphery of the mounting groove, wherein the depth of the sealing groove is 0.2 mm, wherein a conductive layer is provided on the mounting plate, wherein a bonding portion, a coining area or a bracket portion is provided on the lead foot, wherein the bonding portion is a parallelogram with an inner angle of 60° or 120°, wherein a groove is horizontally provided at the upper end of the bracket portion, wherein the cross section of the groove is a right triangle, wherein at least two grooves are provided, and wherein the depth of the groove is 0.1 mm, and wherein the length of the plastic-encapsulated split lead frame is 224.4 mm-224.6 mm, and the width is 20.20 mm-20.30 mm. The conductive layer is a silver-plated or copper-plated conductive layer, and the thickness of the conductive layer is 3-6 μm. The width of the lead pin is 0.565-0.635 mm. The depth of the coining area is 0.05-0.08 mm.

[0004] The lead frames in the above documents can only be used to produce products with one number of pins during use. When products with other numbers of pins need to be replaced, some important precision parts need to be replaced. Each replacement is very difficult and time-consuming, and is also easy to be damaged, which has certain limitations.

[0005] The lead frame in the above document will have gaps in the frame itself after the number of pins is changed. During the subsequent plastic sealing operation, glue overflow may occur at the gaps, resulting in the inability to proceed with production.

[0006] Therefore, we propose a plastic mold lead frame with replaceable pin quantity to solve the above-mentioned problems. Utility Model Content

[0007] The utility model aims to provide a plastic encapsulation mold lead frame with replaceable pin quantity, so as to solve the problem that most of the background technologies mentioned above can only produce products with one pin quantity and may have glue overflow.

[0008] To achieve the above object, the utility model provides the following technical solution: a plastic encapsulation mold lead frame with replaceable pin number, comprising a body, a plastic encapsulation cavity is fixedly connected to the upper part of the body, an overflow port is provided at the lower end of the inner part of the plastic encapsulation cavity, a placement groove is provided inside the body, a fixed pin is fixedly connected to the lower side of the body, and a support column is fixedly connected to the upper part of the body;

[0009] Nested pins, the fixed pins are nested and connected inside the placement grooves, and the sides of the fixed pins are provided with engaging grooves, and the outer side of the body is provided with a docking mechanism that can fix the position of the fixed pins;

[0010] A push rod is nested and connected to the upper end of the support column, and a blocking plug is fixedly connected to the outer end of the push rod, and an adjustment mechanism for adjusting the position of the blocking plug is provided between the lower end of the push rod and the upper end of the support column.

[0011] Furthermore, the docking mechanism includes a clamping rod, the clamping rod is nested and connected to the body, and the inner section of the clamping rod is nested and connected inside the clamping groove, and the outer end of the clamping rod is fixedly connected to a pull plate;

[0012] A sleeve rod is fixedly connected to the inner side of the pull plate, a limiting groove is opened on the side of the body, the limiting groove is fixedly connected to the limiting rod inside, and the sleeve rod is nested and connected to the outer side of the limiting rod, and a return spring is fixedly connected between the inner end of the sleeve rod and the limiting groove.

[0013] Furthermore, the sleeve rod and the pull plate are an integrated structure, the engaging rod forms a sliding structure with the body through the pull plate, the sleeve rod forms a sliding structure with the limit rod through the pull plate, and the sleeve rod forms an elastic structure with the return spring and the limit groove.

[0014] Furthermore, a main airbag is attached to the inner side of the body and contacts the locking rod, and an auxiliary airbag is attached to the inside of the body and contacts the nested pins, and a connecting tube runs through the main airbag and the auxiliary airbag.

[0015] Furthermore, the main airbag is connected to the auxiliary airbag through a connecting tube, and the main airbag and the auxiliary airbag are located at the same horizontal position.

[0016] Furthermore, the adjustment mechanism includes a threaded rod, the threaded rod is nested and connected to the inner upper end of the support column, the lower side of the threaded rod is fixedly connected to a turntable, and the upper end of the threaded rod is threadedly connected to a push rod;

[0017] The lower end of the push rod is fixedly connected to a limiting plate, a sliding groove is provided inside the support column, and the limiting plate is nested and connected inside the sliding groove.

[0018] Furthermore, the threaded rod forms a rotating structure through a turntable and a support column, the push rod forms a sliding structure through the threaded rod and a support column, and the blocking plug is located directly below the overflow port.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] 1. The two-pin lead frame can be plastic-sealed through the main body, the plastic sealing cavity and the fixed pins. When the user needs to plastic-seale a three-pin lead frame, the nested pins can be placed inside the placement groove to plastic-seale the three-pin lead frame;

[0021] 2. When the three-pin state needs to be changed, the user can manually pull the pull plate outward, so that the pull plate drives the clamping rod to move outward. At this time, the clamping rod does not block the placement slot, and the nested pins can be placed inside the placement slot, thereby realizing the transformation from two-pin to three-pin;

[0022] 3. When the pull plate moves, the limit rod will be driven to move inside the limit groove synchronously through the sleeve rod, further improving the stability of the sleeve rod when moving. When the sleeve rod moves, it will pull the reset spring synchronously. When the sleeve rod is not under force, the sleeve rod will drive the locking rod to reset under the driving force of the reset spring itself, so that the inner end of the locking rod enters the inside of the locking groove, limiting the nested pins and reducing the possibility of deviation of the nested pins.

[0023] 4. The user can manually rotate the turntable so that the turntable synchronously drives the threaded rod to rotate. When the threaded rod rotates, it will synchronously drive the push rod to move through the threaded connection, so that the push rod pushes the blocking plug to move upward and blocks the overflow port. At this time, the possibility of glue overflowing from the overflow port during plastic sealing can be reduced to a certain extent;

[0024] 5. When the push rod moves, it will synchronously drive the limit plate to move inside the slide. At this time, the slide limits the movement of the push rod through the limit plate, further improving the stability of the push rod movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the front view of the two-pin state of the lead frame of the utility model;

[0026] Figure 2 This is a schematic diagram of the front view structure of the three-pin state of the lead frame of the utility model;

[0027] Figure 3This is a schematic diagram of the front view structure of the nested pins of the utility model;

[0028] Figure 4 This is a front view structural diagram of the clamping rod of the utility model;

[0029] Figure 5 This is a schematic diagram of the front view structure of the limit rod of the utility model;

[0030] Figure 6 This is a schematic diagram of the front view structure of the push rod of the utility model;

[0031] Figure 7 This is a front view structural diagram of the limit plate of the utility model.

[0032] In the figure: 1. main body; 2. plastic sealing cavity; 3. overflow port; 4. placement groove; 5. fixed pin; 6. nested pin; 7. snap-fit ​​groove; 8. push rod; 9. pull plate; 10. main air bag; 11. connecting pipe; 12. auxiliary air bag; 13. sleeve rod; 14. snap-fit ​​rod; 15. limit groove; 16. limit rod; 17. reset spring; 18. blocking plug; 19. threaded rod; 20. turntable; 21. slide groove; 22. limit plate; 23. support column. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] Embodiment 1:

[0035] like Figure 1 , Figure 2 , Figure 4 and Figure 5 The technical solution shown in the figure, the utility model provides the following technical solution: a plastic encapsulation mold lead frame with replaceable pin number, discloses a docking mechanism, through which the two-pin state can be changed to the three-pin state:

[0036] The main body 1 has a plastic sealing cavity 2 fixedly connected to the upper part of the main body 1, and an overflow port 3 is provided at the lower end of the plastic sealing cavity 2, and a placement groove 4 is provided inside the main body 1, and a fixing pin 5 is fixedly connected to the lower side of the main body 1, and a support column 23 is fixedly connected to the main body 1;

[0037] The nested pins 6, the fixed pins 5 are nested and connected inside the placement grooves 4, and the sides of the fixed pins 5 are provided with engaging grooves 7, and the outer side of the body 1 is provided with a docking mechanism that can fix the position of the fixed pins 5;

[0038] The docking mechanism includes a snap-fit ​​rod 14, which is nested and connected to the body 1, and the inner section of the snap-fit ​​rod 14 is nested and connected inside the snap-fit ​​groove 7, and the outer end of the snap-fit ​​rod 14 is fixedly connected to the pull plate 9; the inner side of the pull plate 9 is fixedly connected to the sleeve rod 13, the side of the body 1 is provided with a limiting groove 15, and the inner part of the limiting groove 15 is fixedly connected to the limiting rod 16, and the outer side of the limiting rod 16 is nested and connected to the sleeve rod 13, and a return spring 17 is fixedly connected between the inner end of the sleeve rod 13 and the limiting groove 15;

[0039] The sleeve rod 13 and the pull plate 9 are an integrated structure. The engaging rod 14 forms a sliding structure with the body 1 through the pull plate 9. The sleeve rod 13 forms a sliding structure with the limit rod 16 through the pull plate 9. The sleeve rod 13 forms an elastic structure with the limit groove 15 through the return spring 17.

[0040] When the tripod state needs to be changed, the user can manually pull the pull plate 9 outward, so that the pull plate 9 drives the locking rod 14 to move outward. At this time, the locking rod 14 does not block the placement slot 4, and the nested pin 6 can be placed inside the placement slot 4, thereby realizing the transformation from two-legged to three-legged. When the pull plate 9 is moving, it will synchronously drive the sleeve rod 13 to move inside the limiting slot 15. At the same time, the limiting rod 16 will limit the sleeve rod 13 to further improve the stability of the sleeve rod 13 during movement. When the sleeve rod 13 moves, it will synchronously pull the reset spring 17. When the sleeve rod 13 is not under force, the sleeve rod 13 will drive the locking rod 14 to reset under the driving of the elastic force of the reset spring 17 itself, so that the inner end of the locking rod 14 enters the inside of the locking slot 7, limits the nested pin 6, and reduces the possibility of deviation of the nested pin 6.

[0041] Embodiment 2:

[0042] like Figure 2 and Figure 4 The technical solution shown in the figure, the utility model provides the following technical solution: a plastic encapsulation mold lead frame with replaceable pin number, discloses an auxiliary airbag 12, through which the nested pin 6 can be just docked inside the placement groove 4:

[0043] A main airbag 10 is attached to the inner side of the body 1 and is in contact with the clamping rod 14. An auxiliary airbag 12 is attached to the inner side of the body 1 and is in contact with the nesting pin 6. A connecting tube 11 is connected between the main airbag 10 and the auxiliary airbag 12.

[0044] The main airbag 10 is connected to the auxiliary airbag 12 through the connecting tube 11 , and the main airbag 10 and the auxiliary airbag 12 are located at the same horizontal position.

[0045] When the locking rod 14 is connected, it will squeeze the main airbag 10 on its side. At this time, the main airbag 10 will transport the internal gas to the interior of the auxiliary airbag 12 through the connecting tube 11. At this time, the auxiliary airbag 12 will expand and fit with the nested pin 6, thereby further improving the stability of the placement of the nested pin 6.

[0046] Embodiment three:

[0047] like Figure 1 , Figure 6 and Figure 7 The technical solution shown in the figure, the utility model provides the following technical solution: a plastic encapsulation mold lead frame with replaceable pin number, an adjustment mechanism is disclosed, and the overflow port 3 can be blocked by the adjustment mechanism:

[0048] A push rod 8, the push rod 8 is nested and connected to the upper end of the support column 23, and the outer end of the push rod 8 is fixedly connected to the blocking plug 18, and an adjustment mechanism for adjusting the position of the blocking plug 18 is provided between the lower end of the push rod 8 and the upper end of the support column 23;

[0049] The adjustment mechanism includes a threaded rod 19, which is nested and connected to the upper end of the support column 23, and the lower side of the threaded rod 19 is fixedly connected to the turntable 20, and the upper end of the threaded rod 19 is threadedly connected to the push rod 8; the lower end of the push rod 8 is fixedly connected to the limit plate 22, and the support column 23 is provided with a slide groove 21, and the limit plate 22 is nested and connected inside the slide groove 21;

[0050] The threaded rod 19 forms a rotating structure with the support column 23 through the turntable 20 , the push rod 8 forms a sliding structure with the support column 23 through the threaded rod 19 , and the blocking plug 18 is located directly below the overflow port 3 .

[0051] The user can manually rotate the turntable 20 so that the turntable 20 synchronously drives the threaded rod 19 to rotate. When the threaded rod 19 rotates, it will synchronously drive the push rod 8 to move through the threaded connection. When the push rod 8 moves, it will synchronously drive the limit plate 22 to move inside the slide groove 21. At this time, the slide groove 21 limits the movement of the push rod 8 through the limit plate 22, further improving the stability of the movement of the push rod 8, so that the push rod 8 can stably push the blocking plug 18 to move upward and block the overflow port 3. At this time, the possibility of glue overflowing from the overflow port 3 during plastic sealing can be reduced to a certain extent.

[0052] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A plastic encapsulation mold lead frame with a replaceable number of pins, comprising a body (1), a plastic encapsulation cavity (2) fixedly connected to the upper part of the body (1), an overflow port (3) provided at the lower end of the inner part of the plastic encapsulation cavity (2), a placement groove (4) provided inside the body (1), a fixed pin (5) fixedly connected to the lower side of the body (1), and a support column (23) fixedly connected to the upper part of the body (1); Features: Also includes: A nested tube pin (6), wherein the fixed tube pin (5) is nested and connected inside the placement groove (4), and a clamping groove (7) is provided on the side of the fixed tube pin (5), and a docking mechanism capable of fixing the position of the fixed tube pin (5) is provided on the outside of the body (1); A push rod (8) is nested and connected to the upper end of the support column (23), and the outer end of the push rod (8) is fixedly connected to a blocking plug (18), and an adjustment mechanism for adjusting the position of the blocking plug (18) is provided between the lower end of the push rod (8) and the upper end of the support column (23).

2. The plastic encapsulation mold lead frame with replaceable pin quantity according to claim 1, characterized in that: The docking mechanism comprises a snap-fitting rod (14), the snap-fitting rod (14) is nested and connected to the body (1), the inner section of the snap-fitting rod (14) is nested and connected inside the snap-fitting groove (7), and the outer end of the snap-fitting rod (14) is fixedly connected to a pull plate (9); A sleeve rod (13) is fixedly connected to the inner side of the pull plate (9), a limiting groove (15) is provided on the side of the body (1), and a limiting rod (16) is fixedly connected inside the limiting groove (15), and the sleeve rod (13) is nested and connected to the outer side of the limiting rod (16), and a return spring (17) is fixedly connected between the inner end of the sleeve rod (13) and the limiting groove (15).

3. The plastic encapsulation mold lead frame with replaceable pin quantity according to claim 2, characterized in that: The sleeve rod (13) and the pull plate (9) are an integrated structure; the engaging rod (14) forms a sliding structure with the body (1) through the pull plate (9); the sleeve rod (13) forms a sliding structure with the limit rod (16) through the pull plate (9); and the sleeve rod (13) forms an elastic structure with the limit groove (15) through the return spring (17).

4. The plastic encapsulation mold lead frame with replaceable pin quantity according to claim 1, characterized in that: A main airbag (10) is attached to the inner side of the main body (1), and the main airbag (10) is in contact with a locking rod (14); an auxiliary airbag (12) is attached to the inside of the main body (1), and the auxiliary airbag (12) is in contact with a nested tube pin (6); and a connecting tube (11) is connected through the main airbag (10) and the auxiliary airbag (12).

5. The plastic encapsulation mold lead frame with replaceable pin quantity according to claim 4, characterized in that: The main airbag (10) is connected to the auxiliary airbag (12) through a connecting pipe (11), and the main airbag (10) and the auxiliary airbag (12) are located at the same horizontal position.

6. The plastic encapsulation mold lead frame with replaceable pin quantity according to claim 1, characterized in that: The adjustment mechanism comprises a threaded rod (19), the threaded rod (19) is nested and connected to the inner upper end of the support column (23), the lower side of the threaded rod (19) is fixedly connected to a rotating disk (20), and the upper end of the threaded rod (19) is threadedly connected to a push rod (8); The lower end of the push rod (8) is fixedly connected to a limit plate (22); a slide groove (21) is provided inside the support column (23); and the limit plate (22) is nested and connected inside the slide groove (21).

7. The plastic encapsulation mold lead frame with replaceable pin quantity according to claim 6, characterized in that: The threaded rod (19) forms a rotating structure through a rotating disk (20) and a supporting column (23), the push rod (8) forms a sliding structure through the threaded rod (19) and the supporting column (23), and the blocking plug (18) is located directly below the overflow port (3).

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