CN112670732B

CN112670732B - Punch forming's fisheye terminal

Info

Publication number: CN112670732B
Application number: CN202011433540.0A
Authority: CN
Inventors: 产起平; 王凯锋
Original assignee: Hefei Zhongheng Micro Semiconductor Co ltd
Current assignee: Hefei Zhongheng Micro Semiconductor Co ltd
Priority date: 2020-12-10
Filing date: 2020-12-10
Publication date: 2022-11-15
Anticipated expiration: 2040-12-10
Also published as: CN112670732A

Abstract

The invention discloses a punch-formed fisheye terminal which comprises a main rod part and an integrally-formed plug part arranged at one end of the main rod part, wherein two reversely-bent first cantilever beams are symmetrically arranged in the middle of the main rod part, two sections of straight beams are arranged between the first cantilever beams, and the free ends of the two sections of straight beams are opposite and have a gap. The fisheye terminal has a buffering effect when being mounted on a PCB (printed circuit board) by arranging the two reversely bent first cantilever beams, so that ceramic cracking caused by sudden change of stress on a DBC (direct bonded copper) is avoided; meanwhile, the two sections of straight beam structures can increase the integral strength of the terminal and prevent the terminal from generating plastic deformation due to overlarge stress, so that the terminal has the advantages of easiness in manufacturing, improvement of product reliability, improvement of production efficiency, reduction of cost by reduction of failure and the like.

Description

Punch forming's fisheye terminal

Technical Field

The invention belongs to the technical field of connecting pieces, and particularly relates to a punch forming fisheye terminal.

Background

With the rapid development and popularization of new energy automobiles, the requirements on an automobile electrical system are higher and higher, an electronic connector is a key component for power and signal transmission, and the performance of the whole electrical system is directly influenced by the quality of the connector, so that people pay more and more attention to the reliability of the electronic connector.

In the field of electronic connectors, fisheye terminals are more and more widely applied, and have the characteristics of small insertion force, short process, vibration resistance, tolerance compensation, small damage to holes of printed circuit boards and the like. When the IGBT module is in practical use, one end of the IGBT module is connected with the PCB in a crimping mode, the other end of the IGBT module is welded on the DBC surface in the IGBT module in a reflow soldering mode, a circuit channel is formed, and signal transmission is achieved.

During practical use, the terminal is pressed and held between the DBC board and the PCB board, the elasticity of the terminal is small, sudden change of stress on the DBC board can occur in the pressing and holding process, ceramic cracking can be caused, and when the elasticity is enough, the situation that plastic deformation occurs due to overlarge deformation can also occur, so that a targeted improved design is needed.

Disclosure of Invention

The present invention is directed to solve the above problems of the related art by putting a fish-eye terminal into use.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a fish eye terminal of stamping forming, includes main pole portion and sets up in the integrated into one piece plug portion of main pole portion one end, the middle part symmetry of main pole portion is provided with two reverse crooked first cantilever beams, be provided with two sections straight roof beams between the first cantilever beam, two sections the free end of straight roof beam is relative and has the clearance.

Preferably, the plug portion is composed of a bearing portion connected with the main rod portion, two second cantilever beams which are symmetrically arranged and are reversely bent and end portions fixedly arranged at the ends of the two second cantilever beams, wherein the two second cantilever beams are fixedly arranged on the bearing portion, and after the plug portion is inserted into the PCB hole, the middle portion of each second cantilever beam is pressed against and contacts the inner wall of the PCB hole.

Preferably, transition fillets are arranged on two sides of the joint of the bearing part and the main rod part.

Preferably, a stressed support plate is arranged at the other end, far away from the plug part, of the main rod part in a relatively vertical mode.

Preferably, the gap between the free ends of the two straight beams is 0.1 mm.

The invention has the technical effects and advantages that: the fisheye terminal formed by punching is provided with a plurality of through holes,

1. through the first cantilever beam of two reverse bendings of symmetry setting, take place elastic deformation towards crooked direction, provide the buffer power, avoid the atress sudden change on the DBC, lead to the condition of ceramic fracture.

2. Through setting up two straight roof beams that are interrupted, when the free end of two straight roof beams supported and pressed together to prevent first cantilever beam to continue to deform, prevent that the too big production plastic deformation of terminal atress, thereby under the circumstances of proof strength, avoided deformation damage, simple structure, easy manufacturing improves product reliability, improves production efficiency, reaches advantages such as reduce cost through reducing the inefficacy.

Drawings

FIG. 1 is a schematic view of the present invention.

In the figure: 1. a main rod portion; 2. a plug portion; 21. a receiving part; 22. a second cantilever beam; 23. an end portion;

3. a first cantilever beam; 4. a straight beam; 5. a transition fillet; 6. and (4) a stressed support plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention provides a punch-formed fisheye terminal as shown in figure 1, which comprises a main rod part 1 and an integrally-formed plug part 2 arranged at one end of the main rod part 1, wherein two reversely-bent first cantilever beams 3 are symmetrically arranged at the middle part of the main rod part 1, two sections of straight beams 4 are arranged between the first cantilever beams 3, and the free ends of the two sections of straight beams 4 are opposite and have gaps.

After the end part of the fisheye terminal is welded on a DBC board, a plug part 2 is vertically upward, a hole of the PCB board is aligned with the plug part 2 and pressed in, in the pressing-in process, a main rod part 1 is stressed, and two reversely bent first cantilever beams 3 symmetrically arranged in the middle of the main rod part 1 elastically deform towards the bending direction to provide buffering force and avoid the condition that ceramic cracks due to sudden stress change on the DBC;

meanwhile, after the two first cantilever beams 3 are elastically deformed, the opposite ends of the two straight beams 4 between the two first cantilever beams 3 are close to each other, when the free ends of the two straight beams 4 are abutted to each other, the first cantilever beams 3 are prevented from continuing to deform, the terminal is prevented from being subjected to overlarge stress to generate plastic deformation, and therefore deformation and damage are avoided under the condition of ensuring the strength.

Plug portion 2 is by the portion of accepting 21 of being connected with mobile jib portion 1, set up and be provided with two symmetry settings and the second cantilever beam 22 of reverse bend and the end portion 23 of fixed setting and two second cantilever beam 22 tip on the portion of accepting 21 and constitute, after plug portion 2 inserted the PCB hole, the middle part of second cantilever beam 22 supported the inner wall in press contact PCB hole, and portion of accepting 21 and end portion 23 set up the PCB board both sides respectively, the terminal can have a better holding power, guarantee the contact strength of terminal and PCB board.

Transition fillets 5 are arranged on two sides of the joint of the bearing part 21 and the main rod part 1. The width of the part is increased, and the structural strength of the cantilever beam at the upper end is enhanced.

And a stressed support plate 6 is relatively and vertically arranged at the other end of the main rod part 1 far away from the plug part 2. Make things convenient for the extrusion atress, avoid the terminal pressurized back whole to take place the skew.

The clearance between the free ends of the two straight beams 4 is 0.1 mm. Further limiting the gap between the straight beams 4 and enhancing the practicality.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a stamping forming's fisheye terminal which characterized in that: the novel plug comprises a main rod part (1) and an integrally-formed plug part (2) arranged at one end of the main rod part (1), wherein two reversely-bent first cantilever beams (3) are symmetrically arranged in the middle of the main rod part (1), two sections of straight beams (4) are arranged between the first cantilever beams (3), and free ends of the two sections of straight beams (4) are opposite and have gaps; after the two first cantilever beams (3) are elastically deformed, the free ends of the two straight beams (4) between the two first cantilever beams (3) are close to each other, and when the free ends of the two straight beams (4) are pressed together, the first cantilever beams (3) are prevented from continuously deforming;

the plug part (2) consists of a bearing part (21) connected with the main rod part (1), two second cantilever beams (22) which are symmetrically arranged and reversely bent and are fixedly arranged on the bearing part (21), and end head parts (23) which are fixedly arranged at the end parts of the two second cantilever beams (22), wherein after the plug part (2) is inserted into the PCB hole, the middle parts of the second cantilever beams (22) are pressed and contacted with the inner wall of the PCB hole; transition fillets (5) are arranged on two sides of the joint of the bearing part (21) and the main rod part (1).

2. The punch-formed fisheye terminal of claim 1 wherein: and a stressed support plate (6) is relatively and vertically arranged at the other end of the main rod part (1) far away from the plug part (2).

3. The punch-formed fisheye terminal of claim 1 wherein: the clearance between the free ends of the two straight beams (4) is 0.1 mm.