CN214046158U

CN214046158U - Metal needle connected with driving circuit board and stamping die thereof

Info

Publication number: CN214046158U
Application number: CN202023069823.XU
Authority: CN
Inventors: 张斌; 麻长胜; 赵善麒
Original assignee: Macmic Science and Technology Co Ltd
Current assignee: Macmic Science and Technology Co Ltd
Priority date: 2020-12-18
Filing date: 2020-12-18
Publication date: 2021-08-24
Anticipated expiration: 2030-12-18

Abstract

The utility model belongs to the technical field of power semiconductor makes, especially, relate to a connect driver circuit board's metal needle and stamping die thereof, including needle body and joint structure, the joint structure includes shell fragment and lower shell fragment, the middle part side of needle body has been seted up and has been held the chamber, it is holding the intracavity with lower shell fragment setting to go up the shell fragment, it is less than the thickness of drive plate to go up the distance between shell fragment and the lower shell fragment. Has the advantages that: the utility model discloses a connect dirver circuit board's metal needle establishes on dirver circuit board through joint structure card, reduces with dirver circuit board's welding or bonding, improves the product yield, reduces man-hour lifting efficiency, is convenient for with dirver circuit board's assembly, is favorable to intelligent power module's integration, accords with the miniaturized trend of intelligent power module.

Description

Metal needle connected with driving circuit board and stamping die thereof

Technical Field

The utility model belongs to the technical field of power semiconductor makes, especially, relate to a connect drive circuit board's metal needle and stamping die thereof.

Background

The Intelligent Power Module (IPM) is widely applied to the fields of variable frequency speed regulation of an alternating current motor, chopping speed regulation of a direct current motor and various high-performance power supplies, such as UPS, induction heating, electric welding machines, active compensation, DC-DC and the like, industrial electric automation and the like, and has a wide market. The IPM is mainly composed of a housing, a main circuit board, and a driver circuit board. Devices such as a semiconductor power chip and the like are welded on the metal-clad ceramic substrate and are connected through metal such as bonding aluminum wires and the like to form the main circuit board. The printed circuit board to which the integrated circuit chip and the devices are soldered constitutes a driving circuit board.

The driving circuit board needs an electric signal output by the main circuit board and also needs to send a driving signal to the main circuit board. In the prior scheme (I), a metal pin is welded on a main circuit board by using a welding flux, and then the metal pin is welded with a driving circuit board, so that the communication between the main circuit board and the driving circuit board is realized; or (II) the electrode terminals are sealed in the shell in a molding way, aluminum wire bonding between the main circuit board and the shell terminal and aluminum wire bonding between the driving circuit board and the shell terminal are respectively carried out, and communication is carried out through the electrode terminals on the shell.

In the scheme (I), when an intelligent power module with higher power is manufactured, a plurality of metal pins are required to be welded at the same input/output end so as to meet the requirement of through-current capacity, the welding operation is complicated, and only one metal pin is used for communicating a driving circuit board, so that only signals are communicated, and no requirement is met for through-current; scheme (two) then need carry out the bonding of upper and lower two-layer, and the flow is more loaded down with trivial details, and is used for the PCB of bonding, and surface cleanliness requires highly, and the drive circuit board will wash after making, even also has the risk that the aluminium silk drops after the washing.

SUMMERY OF THE UTILITY MODEL

For the problem of the signal connection structure complex operation between the drive circuit board who solves prior art existence and the main circuit board, the utility model provides a connect drive circuit board's metal needle and stamping die thereof.

For solving the technical problem, the utility model discloses a technical scheme as follows, a connect drive circuit board's metal needle, including needle body and joint structure, the joint structure includes shell fragment and lower shell fragment, the middle part side of needle body has been seted up and has been held the chamber, it is holding the intracavity with lower shell fragment setting to go up the shell fragment, it is less than drive circuit board thickness to go up the distance between shell fragment and the lower shell fragment.

Preferably, an elastic space is arranged between the upper part of the upper elastic sheet and the needle body, and an elastic space is also arranged between the lower part of the lower elastic sheet and the needle body. The deformation of the upper elastic sheet and the lower elastic sheet is improved, and the reliability of clamping and matching of the upper elastic sheet and the lower elastic sheet with the driving circuit board is improved.

Preferably, the working surfaces of the upper elastic sheet and the lower elastic sheet are arc surfaces close to each other. The drive circuit board can be fully contacted with the upper elastic sheet and the lower elastic sheet after being inserted, and certain reliability is ensured.

Preferably, the upper spring plate and the lower spring plate are provided with guiding chamfers towards the insertion direction of the driving circuit board. The drive circuit board is convenient to insert between the upper elastic sheet and the lower elastic sheet, the stress concentration of the upper elastic sheet and the lower elastic sheet is effectively prevented, and the service life of the upper elastic sheet and the service life of the lower elastic sheet are prolonged.

Furthermore, the metal needle is made of copper or copper alloy.

Further, the clamping structure is formed by stamping. The processing and the manufacturing of the metal needle are convenient.

Furthermore, the side of the driving circuit board is located in the accommodating cavity, and the metal needles are clamped on the adjacent three sides of the driving circuit board through the clamping structure. The drawer-shaped structure is formed after the driving circuit board is inserted into the clamping structure, so that the driving circuit board is convenient to assemble, and the position is well limited.

A stamping die for manufacturing the metal needle comprises a first stamping part and a second stamping part, wherein the first stamping part comprises a first stamping block, a second stamping block and a third stamping block which are sequentially arranged, the first stamping block is I-shaped, the first stamping block is matched with an accommodating cavity, the second stamping block is positioned between an upper elastic sheet and a lower elastic sheet, and the upper elastic sheet and the lower elastic sheet are both positioned between the first stamping block and the third stamping block; the second punching piece comprises a connecting block, a fourth punching block, a fifth punching block and a sixth punching block are sequentially arranged on the connecting block, the fourth punching block is matched with an elastic space between the upper elastic sheet and the needle body, the sixth punching block is matched with an elastic space between the lower elastic sheet and the needle body, and the fifth punching block is positioned between the upper elastic sheet and the lower elastic sheet.

Preferably, an arc-shaped chamfer is arranged between the third punching block and the second punching block; arc-shaped grooves are formed in the upper surface and the lower surface of the fifth punching block. When the punching piece is punched, the guiding chamfers are formed at the same time, wherein the guiding chamfers are arranged on the outer sides of the upper elastic sheet and the lower elastic sheet towards the insertion direction of the driving circuit board; when being convenient for towards two punching presses of piece, the cambered surface that the working face of shell fragment and lower shell fragment was close to each other is formed simultaneously to and go up the leading-in chamfer that the both sides of shell fragment and lower shell fragment all set up towards drive circuit board's direction of insertion.

Has the advantages that: the utility model discloses a connect drive circuit board's metal needle, at first weld a plurality of these metal needles on the metal-coated ceramic base plate of current main circuit board, insert the drive circuit board along leading-in chamfer again in the joint structure, at this moment, the drive circuit board is located between upper elastic sheet and the lower elastic sheet, the side of drive circuit board is located and holds the intracavity, a plurality of these metal needles are established at the adjacent three edges of drive circuit board through joint structure card, form the steamer tray shape structure after guaranteeing that the drive circuit board inserts the joint structure, be convenient for the assembly of drive circuit board, and the position obtains good restriction; the metal needle connected with the driving circuit board reduces welding or bonding with the driving circuit board, improves the product yield, reduces working hours and improves the efficiency; the metal needle connected with the driving circuit board of the utility model is convenient for assembling with the driving circuit board, is beneficial to the integration of the intelligent power module, and accords with the miniaturization trend of the intelligent power module; the utility model discloses a stamping die of this metal needle of preparation simple structure, design benefit, it is with low costs, the stamping forming of this metal needle of being convenient for.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of a metal pin for connecting a driving circuit board according to the present invention;

FIG. 2 is an enlarged partial schematic view of A of FIG. 1;

fig. 3 is a schematic view of the three-dimensional structure of the assembly of the metal needle for connecting the driving circuit board and the driving circuit board of the present invention;

fig. 4 is a schematic perspective view of a first punching member of the punching die for manufacturing the metal needle according to the present invention;

fig. 5 is a schematic three-dimensional structure view of a second punching member of the stamping die for manufacturing the metal needle of the present invention;

FIG. 6 is a schematic front view of the punch as it punches the needle body;

FIG. 7 is a schematic perspective view of a second punch pin body;

in the figure: 1. the needle body, 11, hold the chamber, 2, joint structure, 21, go up the shell fragment, 22, shell fragment down, 23, elastic space, 24, leading-in chamfer, 3, dash a piece one, 31, first towards piece, 32, second towards piece, 33, third towards piece, 34, arc chamfer, 4, dash a piece two, 41, connecting block, 42, fourth towards piece, 43, fifth towards piece, 44, sixth towards piece, 45, arc wall, 5, drive circuit board.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Example 1

As shown in fig. 1-3, a metal needle for connecting a driving circuit board, includes needle body 1 and joint structure 2, joint structure 2 includes shell fragment 21 and lower shell fragment 22, the middle part side of needle body 1 has been seted up and has been held chamber 11, it sets up in holding chamber 11 with lower shell fragment 22 to go up shell fragment 21, the distance between last shell fragment 21 and the lower shell fragment 22 is less than driving circuit board 5's thickness, in this embodiment, driving circuit board 5's side is located and holds chamber 11, and a plurality of this metal needles pass through joint structure 2 card is established on driving circuit board 5's adjacent three limit to guarantee that driving circuit board 5 forms drawer-shaped structure after inserting joint structure 2, be convenient for driving circuit board 5's assembly, and the position obtains good restriction.

In order to improve the reliability of the clamping structure 2 in clamping fit with the driving circuit board 5, in this embodiment, as shown in fig. 2, an elastic space 23 is provided between the upper portion of the upper elastic sheet 21 and the needle body 1, and an elastic space 23 is also provided between the lower portion of the lower elastic sheet 22 and the needle body 1; the working surfaces of the upper elastic sheet 21 and the lower elastic sheet 22 are arc surfaces which are close to each other; and the upper elastic sheet 21 and the lower elastic sheet 22 are both provided with a guiding chamfer 24 towards the insertion direction of the driving circuit board 5.

The material of the metal needle of the embodiment is copper or copper alloy; in order to facilitate the processing and manufacturing of the metal needle, the clamping structure 2 is formed by stamping.

As shown in fig. 4 to 7, a stamping die for manufacturing the metal needle includes a first stamping part 3 and a second stamping part 4, as shown in fig. 4 and 6, the first stamping part 3 includes a first stamping block 31, a second stamping block 32 and a third stamping block 33 which are sequentially arranged, the first stamping block 31 is in an "i" shape, the first stamping block 31 is matched with the accommodating cavity 11, the second stamping block 32 is located between the upper elastic sheet 21 and the lower elastic sheet 22, and the upper elastic sheet 21 and the lower elastic sheet 22 are both located between the first stamping block 31 and the third stamping block 33; as shown in fig. 5 and 7, the second punch 4 includes a connecting block 41, a fourth punch 42, a fifth punch 43, and a sixth punch 44 are sequentially disposed on the connecting block 41, the fourth punch 42 is engaged with the elastic space 23 between the upper spring plate 21 and the needle body 1, the sixth punch 44 is engaged with the elastic space 23 between the lower spring plate 22 and the needle body 1, and the fifth punch 43 is located between the upper spring plate 21 and the lower spring plate 22. In this embodiment, as shown in fig. 4 and 5, an arc-shaped chamfer 34 is disposed between the third punch 33 and the second punch 32, so that when the first punch 3 punches, the lead-in chamfers 24 are formed at the same time, where the outer sides of the upper spring 21 and the lower spring 22 are both disposed toward the insertion direction of the driving circuit board 5; arc-shaped grooves 45 are formed in the upper surface and the lower surface of the fifth punching block 43, so that when the second punching piece 4 is punched, arc surfaces which are close to each other are formed on the working surfaces of the upper elastic piece 21 and the lower elastic piece 22, and the guide-in chamfer 24 is formed in the two sides of the upper elastic piece 21 and the two sides of the lower elastic piece 22 towards the insertion direction of the driving circuit board 5.

The working principle of the metal needle is as follows:

the metal needle can be suitable for an intelligent power module with larger power (generally, the voltage level is more than 650V, and the current level is more than 25A); first weld a plurality of these metal needles on the metal-clad ceramic substrate of current main circuit board, insert joint structure 2 along leading-in chamfer 24 with dirver circuit board 5 again, as shown in fig. 3, this moment, dirver circuit board 5 is located between shell fragment 21 and the lower shell fragment 22, dirver circuit board 5's side is located and holds the chamber 11, a plurality of these metal needles pass through joint structure 2 card and establish at dirver circuit board 5's adjacent three edge, guarantee that dirver circuit board 5 forms the drawer-shaped structure after inserting joint structure 2, be convenient for dirver circuit board 5's assembly, and the position obtains good restriction.

The working principle of manufacturing the metal needle by the stamping die is as follows:

as shown in fig. 6 and 7, the middle side edge of the needle body 1 is punched sequentially through the first punch 3 and the second punch 4, the punching directions of the second punch 4 and the first punch 3 are perpendicular to each other, wherein the first punch 31 is matched with the accommodating cavity 11, the second punch 32 is located between the upper elastic sheet 21 and the lower elastic sheet 22, the upper elastic sheet 21 and the lower elastic sheet 22 are both located between the first punch 31 and the third punch 33, the fourth punch 42 is matched with the elastic space 23 between the upper elastic sheet 21 and the needle body 1, the sixth punch 44 is matched with the elastic space 23 between the lower elastic sheet 22 and the needle body 1, and the fifth punch 43 is located between the upper elastic sheet 21 and the lower elastic sheet 22.

Above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the design of the present invention, equivalent replacement or change should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a connect drive circuit board's metal needle which characterized in that: including needle body (1) and joint structure (2), joint structure (2) include shell fragment (21) and lower shell fragment (22), the middle part side of needle body (1) has been seted up and has been held chamber (11), it sets up in holding chamber (11) with lower shell fragment (22) to go up shell fragment (21), it is less than the thickness of dirver circuit board (5) to go up the distance between shell fragment (21) and lower shell fragment (22).

2. The metal pin of claim 1, wherein: an elastic space (23) is arranged between the upper part of the upper elastic sheet (21) and the needle body (1), and an elastic space (23) is also arranged between the lower part of the lower elastic sheet (22) and the needle body (1).

3. The metal pin of claim 2, wherein: the working surfaces of the upper elastic sheet (21) and the lower elastic sheet (22) are arc surfaces which are close to each other.

4. The metal pin of claim 3, wherein: and the upper elastic sheet (21) and the lower elastic sheet (22) are both provided with leading-in chamfers (24) towards the insertion direction of the drive circuit board (5).

5. The metal pin for connecting a driving circuit board according to any one of claims 1 to 4, wherein: the metal needle is made of copper or copper alloy.

6. The metal pin for connecting a driving circuit board according to any one of claims 1 to 4, wherein: the clamping structure (2) is formed by stamping.

7. The metal pin for connecting a driving circuit board according to any one of claims 1 to 4, wherein: the side of drive circuit board (5) is located and holds chamber (11), and a plurality of these metal needles pass through joint structure (2) card is established on the adjacent three edges of drive circuit board (5).

8. A stamping die for manufacturing the metal needle as claimed in any one of claims 1 to 7, wherein: the punching device comprises a first punching piece (3) and a second punching piece (4), wherein the first punching piece (3) comprises a first punching block (31), a second punching block (32) and a third punching block (33) which are sequentially arranged, the first punching block (31) is I-shaped, the first punching block (31) is matched with the accommodating cavity (11), the second punching block (32) is positioned between an upper elastic sheet (21) and a lower elastic sheet (22), and the upper elastic sheet (21) and the lower elastic sheet (22) are both positioned between the first punching block (31) and the third punching block (33); the second punching piece (4) comprises a connecting block (41), a fourth punching block (42), a fifth punching block (43) and a sixth punching block (44) are sequentially arranged on the connecting block (41), the fourth punching block (42) is matched with an elastic space (23) between the upper elastic sheet (21) and the needle body (1), the sixth punching block (44) is matched with an elastic space (23) between the lower elastic sheet (22) and the needle body (1), and the fifth punching block (43) is located between the upper elastic sheet (21) and the lower elastic sheet (22).

9. The stamping die of claim 8, wherein: an arc-shaped chamfer (34) is arranged between the third punching block (33) and the second punching block (32); arc-shaped grooves (45) are formed in the upper surface and the lower surface of the fifth punching block (43).