Novel split type crimping Pin structure

Abstract

The utility model discloses a novel split type crimping Pin needle structure, comprising a Pin needle, the Pin needle comprises a Pin needle guiding part, a Pin needle crimping part, a spacing boss and a Pin needle tail part, the Pin needle crimping part is used for interference fit with a PCB, the upper end of the Pin needle crimping part is in electrical conduction connection with the Pin needle guiding part, the lower end of the Pin needle crimping part is in electrical conduction connection with the spacing boss, and the Pin needle tail part is used for pressing the Pin needle. The tail part of the Pin is electrically connected with the limiting boss; the tail parts of the Pins are inserted into the base and are limited through the limiting bosses, so that the tail parts of the Pins are prevented from penetrating through the base to be in contact with the DBC board; the length of the tail part of the Pin is set to be L, the height of the base is set to be h, and L is smaller than h; the upper end face and the lower end face of the base are each provided with a material containing structure, the material containing structures are used for containing more welding flux so that the welding firmness of the base and the DBC board can be improved, and the material containing structures are further used for limiting the limiting bosses.

Description

TECHNICAL FIELD

[0001] The utility model relates to power module technical field, concretely relates to a novel split type crimping pin structure. BACKGROUND

[0002] At present, the common split type crimping pin structure in market generally includes two parts of pin and base, and the crimping pin structure is mainly applied to power module, is used for connecting PCB board and DBC board, thereby is used to transmit drive signal or conducts electricity. However, in the process of assembling PCB board on power module, the existing split type crimping pin structure will face some problems, for example, when the PCB board is inserted through the pin and the pin crimping part and is connected in interference, the pin crimping part has not been deformed by extruding the PCB board, the pin has already completely passed through the base and directly contacted with the DBC board (copper clad ceramic substrate), thereby causing the damage of DBC board, and the existing base structure also needs to distinguish the front and back, so that the front and back of the base need to be paid attention to when assembling the pin and the base, causing that the operation in the assembling process is complex and the efficiency is low. SUMMARY

[0003] The utility model discloses a novel split type crimping pin structure, which is designed to solve the above problems.

[0004] To achieve the above object, the utility model is realized through the following technical schemes:

[0005] The utility model discloses a novel split type crimping pin structure, which includes:

[0006] The pin includes a pin guide part, a pin crimping part, a limiting boss and a pin tail part arranged from top to bottom, the pin crimping part is used for interference fit with the PCB board, the upper end of the pin crimping part is electrically connected with the pin guide part, the lower end of the pin crimping part is electrically connected with the limiting boss, and the pin tail part is electrically connected with the limiting boss;

[0007] The base is inserted into the base and is limited by the limiting boss, so as to prevent the pin tail part from contacting with the DBC board through the base;

[0008] The length of the Pin needle tail is L, the height of the base is h, and L < h is satisfied; the upper end surface and the lower end surface of the base are respectively provided with a material containing structure, the material containing structure is used for containing more solder to increase the welding firmness of the base and the DBC plate, and the material containing structure is also used for limiting the limiting boss.

[0009] Further, a new split type crimping Pin needle structure: a first guide slope is arranged at one end of the Pin needle guide portion away from the Pin needle crimping portion; the first guide slope is used to guide the PCB plate to pass through the Pin needle guide portion and the Pin needle crimping portion to form an interference fit.

[0010] Preferably, by arranging the first guide slope at the end of the Pin needle guide portion, the Pin needle guide portion forms a pointed structure, thereby facilitating the interference fit of the PCB plate passing through the Pin needle guide portion and the Pin needle crimping portion during PCB assembly.

[0011] Further, a new split type crimping Pin needle structure: a second guide slope is arranged at one end of the Pin needle tail away from the limiting boss; the second guide slope is used to guide the Pin needle tail to be inserted into the base.

[0012] Preferably, by arranging the second guide slope at the end of the Pin needle tail, the Pin needle tail also forms a pointed structure, thereby facilitating the insertion of the Pin needle into the base during assembly of the Pin needle and the base, and simplifying the assembly process of the Pin needle and the base.

[0013] Further, a new split type crimping Pin needle structure: the base is arranged as a hollow tubular structure.

[0014] Further, a new split type crimping Pin needle structure: the material containing structures arranged on the upper end surface and the lower end surface of the base are the same.

[0015] Preferably, the upper end surface and the lower end surface of the base are arranged as the same structure, so that the front and back surfaces of the base can be distinguished during assembly of the Pin needle and the base, thereby reducing the operation complexity of the assembly process of the Pin needle and the base and improving the assembly efficiency.

[0016] Further, a new split type crimping Pin needle structure: the material containing structure is arranged as a plurality of protrusions; the plurality of protrusions are arranged on the upper end surface and the lower end surface, and a clamping groove is formed between the plurality of protrusions, and the limiting boss is clamped in the clamping groove.

[0017] Further, a new split type crimping Pin needle structure: the material containing structure is provided by a plurality of grooves; a plurality of grooves are arranged on the upper end surface and the lower end surface, and the limiting boss is clamped in the groove.

[0018] Further, a new split type crimping Pin needle structure: the Pin needle guide part, the Pin needle crimping part, the limiting boss and the Pin needle tail part are integrally arranged.

[0019] The utility model discloses beneficial effects:

[0020] (1) the utility model discloses a new split type crimping Pin needle structure, which is provided with a limiting boss, when the Pin needle (Pin needle tail part) is inserted into the base and reaches a certain stroke, the limiting boss interferes with the end surface of the base, thereby preventing the Pin needle from moving downward, so as to prevent the Pin needle tail part from colliding with the DBC board, thereby avoiding damage to the DBC board, and the utility model ensures that the heights of all Pin needles in the power module are consistent by arranging the limiting boss, so that the performance of the module is stable.

[0021] (2) the utility model discloses a new split type crimping Pin needle structure, when the PCB board is inserted and assembled, the Pin needle crimping part is deformed under the extrusion of the PCB board, and the Pin needle tail part does not contact the DBC board due to the arrangement of the limiting boss, so that the Pin needle tail part does not collide with the DBC board, and the DBC board is not damaged, and the extrusion pressure of the PCB board can be directly dispersed to the DBC board.

[0022] (3) the utility model discloses a new split type crimping Pin needle structure, which is provided with the same material containing structure on the upper end surface and the lower end surface of the base, which can accommodate more solder, thereby making the welding between the base and the DBC board more firm and improving the stability of the product.

[0023] In addition, the utility model has simple structure and low manufacturing difficulty.

[0024] (4) The novel split type crimping Pin needle structure designed in the utility model has the first guide inclined surface arranged on the Pin needle guide part, so that the Pin needle guide part can form a pointed structure, thereby facilitating the interference fit of the PCB board with the Pin needle guide part and the Pin needle crimping part in the PCB board assembly process, and simplifying the assembly process of the PCB board in the production of the power module. The second guide inclined surface is arranged on the tail part of the Pin needle, so that the tail part of the Pin needle also forms a pointed structure, thereby facilitating the insertion of the Pin needle into the base in the assembly process of the Pin needle and the base, simplifying the assembly process of the Pin needle and the base, and simplifying the production process of the novel split type crimping Pin needle structure itself.

[0025] (5) The novel split type crimping Pin needle structure designed in the utility model has the upper end face and the lower end face of the base arranged as the same structure, so that the front and back faces of the base can not be distinguished in the assembly process of the Pin needle and the base, thereby reducing the operation complexity of the assembly process of the Pin needle and the base, improving the assembly efficiency, and improving the production efficiency of the novel split type crimping Pin needle structure. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings.

[0027] Figure 1 A sectional view of a novel split type crimping Pin needle structure designed in the utility model embodiment 1 is shown in the figure.

[0028] Figure 2 A structure diagram of the Pin needle in the utility model embodiment 1 is shown in the figure.

[0029] Figure 3 A structure diagram of the base in the utility model embodiment 1 is shown in the figure.

[0030] Figure 4 A schematic diagram of the novel split type crimping Pin needle structure of the utility model embodiment 1 and the interference fit of the PCB board and the welding of the DBC board is shown in the figure.

[0031] Figure 5 A structure diagram of the base in the utility model embodiment 2 is shown in the figure.

[0032] The markings in the diagram are: 1-Pin, 2-Base, 3-PCB board, 4-DBC board, 11-Pin guide, 12-Pin crimping part, 13-Limiting boss, 14-Pin tail, 21-Upper end face, 22-Lower end face, 23-Bump, 24-Slot, 25-Groove, 111-First guide slope, 141-Second guide slope. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0034] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "top," and "bottom," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. Moreover, the terms "first," "second," etc., are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model described herein can be implemented in orders other than those illustrated or described herein.

[0035] Example 1

[0036] like Figures 1-4 As shown, this embodiment 1 designs a novel split-type crimp pin structure, which includes:

[0037] Pin needle 1, comprising Pin needle guide part 11, Pin needle crimping part 12, limiting boss 13 and Pin needle tail part 14 arranged integrally from top to bottom; the upper end of the Pin needle crimping part 12 is electrically conductive connected with the Pin needle guide part 11, the lower end of the Pin needle crimping part 12 is electrically conductive connected with the limiting boss 13, the end of the Pin needle guide part 11 away from the Pin needle crimping part 12 is provided with a first guide slope 111, through which the PCB board 3 is guided to pass through the Pin needle guide part 11, so as to realize the interference fit between the PCB board 3 and the Pin needle crimping part 12, the Pin needle tail part 14 is electrically conductive connected with the limiting boss 13, and the end of the Pin needle tail part 14 away from the limiting boss 13 is provided with a second guide slope 141;

[0038] and base 2, which is provided as a hollow tubular structure, the Pin needle tail part 14 is inserted into the base 2 (in this insertion process, the guiding action of the second guide slope 141 can be used to make the Pin needle tail part 14 more smoothly inserted into the base 2), after the Pin needle tail part 14 is inserted into the base 2, it is limited by the limiting boss 13 to prevent the Pin needle tail part 14 from contacting the DBC board 4 through the base 2, the length of the Pin needle tail part 14 is set as L, the height of the hollow tubular structure of the base 2 is set as h, and L < h is satisfied;

[0039] Wherein, the upper end face 21 and the lower end face 22 of the base 2 are respectively provided with the same material containing structure, the material containing structure is composed of a plurality of symmetrically arranged protrusions 23 (specifically, the material containing structure in embodiment 1 is composed of 4 protrusions 23), each protrusion 23 is protrudingly arranged on the upper end face 21 and the lower end face 22, and each protrusion 23 is non-contactingly arranged between the protrusions 23, so that a clamping groove 24 can be formed between the protrusions 23, the clamping groove 24 is just for clamping the limiting boss 13 therein, which can constitute the limiting effect of the limiting boss 13, thereby avoiding the problem of unstable structure of the Pin needle 1 after the Pin needle tail part 14 (i.e. the Pin needle 1) is inserted into the base 2, achieving the purpose of improving the structural stability of the new split crimping Pin needle structure itself, and the designed material containing structure can also be used to contain more solder, thereby increasing the welding firmness of the base 2 and the DBC board 4.

[0040] As Figure 4As shown, during the assembly of PCB board 3, PCB board 3 needs to pass through pin guide part 11 and then achieve an interference fit with pin crimping part 12. During this assembly process, PCB board 3 will squeeze pin crimping part 12. In the existing split crimping pin structure, the pin tail will directly penetrate the base 2 and impact the DBC board 4 during this squeezing process, which will cause damage to the DBC board 4. However, in the new split crimping pin structure designed in Embodiment 1, when the pin crimping part 12 is subjected to the squeezing of PCB board 3, the pin tail 14 will not pass through the base 2 and impact the DBC board 4 due to the setting of the limiting boss 13. Therefore, the pin tail 14 can avoid collision with the DBC board 4 and will not cause damage to the DBC board 4. Moreover, the squeezing pressure from PCB board 3 can be directly distributed to the DBC board 4, avoiding damage to the power module caused by uneven squeezing force during the assembly process.

[0041] like Figure 4 As shown, during the assembly process of the pin 1 (pin tail 14) and the base 2, since the upper end face 21 of the base 2 is provided with a material-containing structure, after the pin 1 is inserted into the base 2, the groove 24 on the material-containing structure and the limiting boss 13 are used to form a snap-fit, thereby fixing the position of the pin 1 in the base 2 and achieving the purpose of improving the structural stability of the new split-type crimp pin structure itself.

[0042] like Figure 4 As shown, during the welding process of this novel split-type crimp pin structure of Embodiment 1 to the DBC board 4, due to the material-containing structure, more solder can be contained between the lower end face 22 of the base 2 and the DBC board 4, thereby making the welding between the base 2 and the DBC board 4 more robust and improving the stability of the manufactured power module product.

[0043] Example 2

[0044] The difference between Example 2 and Example 1 is as follows: Figure 5 As shown, the material-containing structure in Embodiment 2 is composed of several grooves 25 (specifically, the material-containing structure in Embodiment 2 is composed of 4 grooves 25). The 4 grooves 25 are recessed on the upper end face 21 and the lower end face 22, and the size of the grooves 25 is designed to just fit with the limiting boss 13. After the limiting boss 13 is fitted into the groove 25, the groove 25 can limit the limiting boss 13, thereby avoiding the problem of the Pin 1 structure being unstable after the Pin tail 14 (i.e. Pin 1) is inserted into the base 2, and improving the structural stability of the new split-type press-fit Pin structure itself.

[0045] In addition, the novel split type crimping Pin needle structure designed in the embodiment 1 and the embodiment 2 sets the upper end face 21 and the lower end face 22 of the base 2 as the same structure, so that the front and back surfaces of the base 2 can not be distinguished in the assembling process of the Pin needle 1 and the base 2, thereby reducing the operation complexity of the assembling process of the Pin needle 1 and the base 2, improving the assembling efficiency, that is, improving the production efficiency of the novel split type crimping Pin needle structure.

[0046] The above is the preferred embodiment of the utility model, which is used for explaining the utility model, and does not limit the utility model. Any obvious changes or changes derived from the technical scheme of the utility model are still within the protection scope of the utility model.

Claims

1. A novel split crimp pin structure, characterized by, The split type compression pin structure comprises: a pin (1) comprising a pin guide part (11), a pin compression part (12), a limiting boss (13) and a pin tail part (14), the pin compression part (12) is used for interference fit with a PCB (3), the upper end of the pin compression part (12) is electrically connected with the pin guide part (11), the lower end is electrically connected with the limiting boss (13), and the pin tail part (14) is electrically connected with the limiting boss (13); and a base (2), the pin tail part (14) is inserted into the base (2) and limited by the limiting boss (13) to prevent the pin tail part (14) from penetrating through the base (2) and contacting a DBC board (4); wherein the length of the pin tail part (14) is L, the height of the base (2) is h, and L < h is satisfied; wherein the upper end surface (21) and the lower end surface (22) of the base (2) are respectively provided with a material containing structure, the material containing structure is used for containing more solder to increase the welding firmness of the base (2) and the DBC board (4), and the material containing structure is also used for limiting the limiting boss (13).

2. A novel split crimp pin structure according to claim 1, characterized in that, The pin guide part (11) is provided with a first guide inclined surface (111) at one end away from the pin compression part (12); the first guide inclined surface (111) is used for guiding the PCB (3) to penetrate through the pin guide part (11) and interfere fit with the pin compression part (12).

3. A novel split crimp pin structure according to claim 1, wherein, The pin tail part (14) is provided with a second guide inclined surface (141) at one end away from the limiting boss (13); the second guide inclined surface (141) is used for guiding the pin tail part (14) to penetrate into the base (2).

4. A novel split crimp pin structure according to claim 1, wherein, The base (2) is provided as a hollow tubular structure.

5. A novel split crimp pin structure according to claim 1, wherein, The material containing structures respectively arranged on the upper end surface (21) and the lower end surface (22) of the base (2) are the same.

6. A new split crimp pin structure according to claim 1 or 5, characterized in that, The material containing structure is composed of a plurality of protrusions (23); a plurality of protrusions (23) are protrudingly arranged on the upper end surface (21) and the lower end surface (22), and a clamping groove (24) is formed between the plurality of protrusions (23), and the limiting boss (13) is clamped in the clamping groove (24).

7. A new split crimp pin structure according to claim 1 or 5, wherein, The material containing structure is composed of a plurality of recesses (25); a plurality of recesses (25) are recessedly arranged on the upper end surface (21) and the lower end surface (22), and the limiting boss (13) is clamped in the recesses (25).

8. A new split crimp pin structure according to claim 1, wherein, The pin guide part (11), the pin compression part (12), the limiting boss (13) and the pin tail part (14) are integrally arranged.

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