CN214068935U

CN214068935U - PCB contact pin and dc-to-ac converter

Info

Publication number: CN214068935U
Application number: CN202120352477.1U
Authority: CN
Inventors: 何豆; 梁一鸣; 刘谦
Original assignee: Shenzhen STS Microelectronics Co Ltd
Current assignee: Shenzhen STS Microelectronics Co Ltd
Priority date: 2021-02-06
Filing date: 2021-02-06
Publication date: 2021-08-27
Anticipated expiration: 2031-02-06

Abstract

The utility model discloses a PCB contact pin, which comprises a contact pin body, an elastic buffer part and a bottom plate; the pin body and the elastic buffer part are sequentially connected end to end along the vertical direction; the bottom plate is horizontally arranged and connected with the tail part of the elastic buffer part; the elastic buffer part can be elastically compressed and deformed along the vertical direction under the action of external force; the pin body is used for fixing and inserting an external PCB, and the tail part of the pin body extends downwards to form a limiting column; the limiting column is in a suspended state when the elastic buffer part is not elastically compressed and deformed. The utility model discloses a PCB contact pin, it can restrict the contact pin body and last downstream and support the contact pin body under the exogenic action on the basis that does not influence buffering shock-absorbing function to the equipment of the contact pin body of being convenient for and PCB board. The utility model also discloses an inverter.

Description

PCB contact pin and dc-to-ac converter

Technical Field

The utility model relates to a contact pin field that semiconductor power module made especially relates to a PCB contact pin and dc-to-ac converter.

Background

At present, a PCB of most electronic products (such as an inverter, a sensor, etc.) is configured to transmit power and signals to the outside through a pin, wherein the pin is fixed on a housing of the electronic product, and a jack of the PCB is fixedly sleeved outside the pin to achieve conduction between the PCB and the pin; however, the existing electronic product has poor anti-seismic performance, and when the electronic product is applied to the fields of electric vehicles, automobiles and the like, the PCB can deform along with the large jolting vibration generated in the running processes of the electric vehicles, the automobiles and the like, and at the moment, the contact pin and the PCB can be greatly pulled, so that the PCB is easily damaged or the contact between the contact pin and the PCB fails.

Aiming at the problem of poor anti-seismic performance of electronic products, the prior document with the publication number of CN111668629A-PCB floating socket provides a solution, and particularly refers to the specification of the prior document, the prior document discloses a PCB floating socket which is used for connecting at least two PCBs; the floating terminal set comprises at least one first floating terminal and at least one second floating terminal, and the first floating terminal and the second floating terminal are made of elastic deformation materials; the first floating terminal and the second floating terminal positioned on the base are electrically connected with at least one target PCB. The first floating terminal and the second floating terminal further comprise a contact pin, a base rod and a bending part; in the practical application process, the floating design in the length, width and height directions is realized through the elastic deformation of the first floating terminal and the second floating terminal, and the anti-vibration performance is excellent.

From the above, the prior document discloses that the problem of improving the shock resistance is solved by adopting a structure in which the first floating terminal and the second floating terminal, which include the pin, the base rod, and the bent portion, are made of an elastically deformable material; however, the contact pin is connected with the bent part, so that when the PCB and the contact pin are assembled, if the PCB is pressed and sleeved outside the contact pin and is directly pressed downwards, the bent part is stressed and compressed to drive the contact pin to move downwards all the time, and the PCB cannot be smoothly sleeved outside the contact pin conveniently; in order to avoid this, the operator is required to fix the pins at the same time, which is disadvantageous for assembly.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a PCB contact pin, it can restrict the contact pin body and continue the downstream and support the contact pin body under the exogenic action on the basis that does not influence buffering shock-absorbing function to be convenient for the equipment of contact pin body and PCB board.

The utility model discloses a second purpose lies in providing the dc-to-ac converter, and the equipment is convenient, and the yields is high.

The utility model discloses an one of the purpose adopts following technical scheme to realize:

a PCB pin comprises a pin body, an elastic buffer part and a bottom plate; the pin body and the elastic buffer part are sequentially connected end to end along the vertical direction; the bottom plate is horizontally arranged and is connected with the tail part of the elastic buffer part; the elastic buffer part can be elastically compressed and deformed along the vertical direction under the action of external force; the pin body is used for fixing and inserting an external PCB, and the tail part of the pin body extends downwards to form a limiting column; the limiting column is in a suspended state when the elastic buffering part is not elastically compressed and deformed.

Further, the bottom plate is in smooth transition connection with the elastic buffer part.

Further, the bottom plate is made of a metal material.

Furthermore, the elastic buffer part is positioned on one side of the bottom plate, and the area of the elastic buffer part on the top surface of the bottom plate where the projection is positioned is a projection area; the edge of the other side of the projection area close to the bottom plate is formed into a positioning edge; one side of the bottom plate is sunken to the other side to form a U-shaped notch; the bottom surface of the U-shaped notch is positioned on the same straight line with the edge of the top surface of the bottom plate and the positioning edge.

Further, the elastic buffer part comprises at least one U-shaped bent section, and an opening of the U-shaped bent section faces to the horizontal direction.

Further, the number of the U-shaped bent sections is two; the two U-shaped bending sections are vertically arranged and form an S shape.

Furthermore, the number of the elastic buffer parts is two, and the two elastic buffer parts are arranged on two sides of the limiting column.

Furthermore, the contact pin body comprises a plug section, an elastic outward-expanding section which is connected with the tail part of the plug section and expands outwards relative to the plug section, and a connecting section which is connected with the tail part of the elastic outward-expanding section; the plug section can penetrate through the jack of the PCB; the elastic outward-expanding section can generate inward-shrinkage elastic change under the action of external force to enter the jack of the PCB and can recover to tension the jack of the PCB; the connecting section is respectively connected with the elastic buffer part and the limiting column.

Furthermore, the longitudinal section of the elastic outward-expanding section is in an ellipse-like shape, and a hollow structure penetrating through two opposite side faces of the elastic outward-expanding section is arranged in the middle of the elastic outward-expanding section.

The second purpose of the utility model is realized by adopting the following technical scheme:

an inverter comprises a shell, a PCB and the PCB contact pin, wherein the PCB and the PCB contact pin are arranged in the shell; the bottom plate is welded to the bottom surface of the shell through ultrasonic waves; the PCB board is installed on the shell, and the jack of PCB board is fixed the suit and is in outside the contact pin body.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses a through setting up end to end's contact pin body and elastic buffer portion in proper order, at the afterbody connecting bottom plate of elastic buffer portion, simultaneously, still extend downwards at the afterbody of contact pin body and form spacing post to make spacing post be in unsettled state when elastic buffer portion does not take place elastic compression deformation along the vertical under the exogenic action, so, elastic buffer portion has the space of compression deformation downwards, ensures buffer function; and when the equipment, through installing the bottom plate on the external installation face, thereby install this PCB contact pin on the external installation face, press the suit PCB board toward the contact pin body, elasticity buffering portion atress compression deformation downwards, when elasticity buffering portion compression deformation downwards to a locating position, spacing post supports in external installation face and prevents elasticity buffering portion continuation compression deformation downwards, promptly, prevent the contact pin body to continue downstream, play spacing supporting role to the contact pin body, thereby do benefit to the smooth suit of PCB board outside the contact pin body, need not fixed contact pin body in addition, be convenient for assemble.

Drawings

Fig. 1 is a schematic structural view of the PCB contact pin of the present invention;

fig. 2 is a schematic structural diagram of the PCB contact pin of the present invention (different from fig. 1 of the present invention in view angle);

fig. 3 is a top view of the PCB contact pin of the present invention;

fig. 4 shows the assembled state of the PCB pin and the PCB board of the present invention.

In the figure: 10. a pin body; 11. a plug section; 12. an elastic flaring segment; 121. a hollow structure; 13. a connecting section; 20. an elastic buffer part; 21. a U-shaped bent section; 30. a base plate; 31. a top surface of the base plate; 32. a bottom surface of the base plate; 40. a limiting column; 41. the bottom surface of the limiting column; 50. a U-shaped notch; 51. the bottom surface of the U-shaped notch; 60. a PCB board; 70. and positioning the edge.

Detailed Description

As shown in fig. 1 to 4, a PCB pin includes a pin body 10, an elastic buffer portion 20, and a bottom plate 30; the pin body 10 and the elastic buffer part 20 are sequentially connected end to end along the vertical direction; the bottom plate 30 is horizontally arranged and connected with the tail part of the elastic buffering part 20, and the bottom plate 30 is used for being fixedly connected with an external mounting surface so as to realize the installation of the PCB pin; the elastic buffer part 20 can be elastically compressed and deformed in the vertical direction under the action of external force, and it can be understood that the elastic buffer part 20 is elastically deformed, so that the elastic buffer part 20 can be restored under the action of elastic stress after the external force is removed; it should be noted that the elastic buffering portion 20 can also be elastically stretched and deformed in the vertical direction under the action of external force; the pin body 10 is used for fixing and inserting the external PCB 60, and specifically, the pin body 10 is used for electrically conducting with the external PCB 60; the tail part of the pin body 10 also extends downwards to form a limiting column 40; the limiting column 40 is in a suspended state when the elastic buffer part 20 is not elastically compressed and deformed, and it should be noted here that the suspended state of the limiting column 40 means that the bottom surface 41 of the limiting column is higher than the bottom surface 32 of the base plate, that is, when the base plate 30 is placed on the external mounting surface, a gap exists between the bottom surface 41 of the limiting column and the external mounting surface, and the gap ensures that the elastic buffer part 20 has a space for compressing downwards, that is, the buffering function of the elastic buffer part 20 on the PCB 60 is ensured during external bumping vibration; meanwhile, it should be noted that the bottom surface 41 of the limiting column is the surface of the limiting column 40 facing the external mounting surface when the PCB pin is in use; the bottom surface 32 of the base plate is the surface of the base plate 30 facing the external mounting surface when the present PCB pin is applied.

On the basis of above-mentioned structure, when assembling this PCB contact pin and outside PCB board 60, install bottom plate 30 on outside installation face, press suit PCB board 60 toward contact pin body 10, elasticity buffering portion 20 atress compression deformation downwards, when elasticity buffering portion 20 compression deformation downwards to a locating position, spacing post 40 supports in outside installation face, prevent elasticity buffering portion 20 continuation compression deformation downwards, promptly, prevent contact pin body 10 continuation downstream, thereby do benefit to PCB board 60 smooth suit outside contact pin body 10, be convenient for assemble.

Furthermore, when the electronic product with this PCB pin is applied to the electric vehicle, when jolting shock occurs in the electric vehicle, the elastic buffering part 20 vertically generates elastic deformation to buffer the PCB 60, and when the elastic buffering part 20 is compressed and deformed downwards to a certain position by external jolting shock, the limiting column 40 supports against the external installation surface, and also prevents the elastic buffering part 20 from continuing to compress and deform downwards, that is, the elastic buffering part 20 can be prevented from being compressed and broken due to excessive compression of the elastic buffering part 20, and meanwhile, the possibility that the pin body 10 moves downwards too much to be disconnected with the PCB 60 due to excessive compression of the elastic buffering part 20 is avoided.

Specifically, the bottom plate 30 is smoothly and transitionally connected with the elastic buffer part 20, so that the processing difficulty is reduced.

The utility model discloses in, this bottom plate 30 is preferred to adopt metal material to make, like this, install this PCB contact pin at external installation face, and external installation face is the face of metal material, accessible ultrasonic bonding's mode is with bottom plate 30 and external installation face welded fastening, adopt conventional reflow soldering's mode relatively, can avoid reflow soldering in-process because the problem that liquid tin cream flows and causes bottom plate 30 mounted position skew, namely, improve contact pin body 10's installation accuracy, and simultaneously, ultrasonic bonding's mode can provide more reliable and stable joint strength, avoid contact pin body 10 to take place to shift, the emergence of application risks such as droing, improve the product yield.

More preferably, the bottom surface 32 of the bottom plate is formed in a horizontal plane so that the horizontal plane can secure an area where it is contact-welded with an external mounting surface, thereby further improving the mounting strength of the bottom plate 30.

Since the ultrasonic waves emitted by the ultrasonic welding machine are vertically emitted to the bottom plate 30 during ultrasonic welding, in this case, in order to make the ultrasonic waves better avoid the elastic buffer part 20, preferably, the elastic buffer part 20 is located on one side of the bottom plate 30, and the area where the elastic buffer part 20 is projected on the top surface 31 of the bottom plate is a projection area, it can be understood that the projection area is located on the top surface 31 of the bottom plate; the side of the other side of the projection area close to the bottom plate 30 is formed as a positioning side 70; one side of the bottom plate 30 is recessed to the other side to form a U-shaped notch 50; the bottom surface 51 of the U-shaped notch is located on the same straight line with the positioning edge 70 on the side of the top surface 31 of the bottom plate, and it should be noted here that the bottom surface 51 of the U-shaped notch refers to the surface of the U-shaped notch 50 facing the mouth; thus, the position of the notch can be detected by matching with an external detector, when the detector moves from the notch to one side of the bottom plate 30 to the position that the notch cannot be detected, the position detected by the detector at the moment is staggered with the elastic buffer part 20, and therefore the ultrasonic welding machine can accurately weld and avoid the risk of interference with the elastic buffer part 20; of course, the bottom surface 51 of the U-shaped notch may also be arranged on the edge of the bottom plate top surface 31: at a position closer to the other side of the base plate 30 than the positioning edge 70.

It should be noted that, the pin body 10, the elastic buffer portion 20, the bottom plate 30 and the limiting post 40 are integrally formed, and it should be noted that "integrally formed" means that the pin body 10, the elastic buffer portion 20, the bottom plate 30 and the limiting post 40 are formed by cutting and bending the same plate, and the four components having a connection relationship among the pin body 10, the elastic buffer portion 20, the bottom plate 30 and the limiting post 40 do not need to be additionally fixed; more specifically, the pin body 10, the elastic buffer portion 20, the bottom plate 30 and the limiting column 40 may be made of the same material, for example: copper, copper alloy, etc. which can ensure the conductivity of the pin body 10; when the elastic buffer portion 20 is processed, the elastic buffer portion 20 is formed into a sheet shape, and the elastic buffer portion 20 is provided in a bent structure, so that the elastic buffer portion 20 can be elastically deformed within a certain range by controlling the thickness of the sheet shape; when the limiting column 40 is processed, the diameter of the limiting column 40 can be controlled, that is, the thickness of the limiting column 40 is controlled to ensure that the limiting column 40 keeps certain hardness, so that the limiting column 40 is prevented from deforming under stress, and a stable limiting effect is achieved.

The elastic buffer part 20 can adopt a spring, an elastic column and other structures; in this embodiment, the elastic buffering portion 20 includes at least one U-shaped bent section 21, and it should be noted that "U-shape" of "the U-shaped bent section 21" means that an extending track thereof is U-shaped; the opening of the U-shaped bent section 21 faces the horizontal direction, so that the elastic buffer portion 20 can be elastically deformed in the vertical direction.

The number of the U-shaped bent sections 21 is preferably 2 to 3, and in the present invention, the number of the U-shaped bent sections 21 is further preferably two, so that the compression deformation range of the elastic buffering portion 20 can be increased to achieve a better buffering effect; the two U-shaped bent sections 21 are disposed at the top and bottom and form an S-shape, and it can be understood that the openings of the two U-shaped bent sections 21 face in opposite directions.

More preferably, the number of the elastic buffer parts 20 is two, and the two elastic buffer parts 20 are partially disposed at both sides of the position-limiting column 40, so that the elastic force distribution is relatively balanced.

The pin body 10 may be configured to be in an interference fit with the socket of the PCB 60, but the interference fit is a rigid connection, and in a vibration environment, a large pulling force may be generated between the PCB 60 and the pin body 10 when the PCB is deformed by vibration, thereby damaging the PCB 60; therefore, the present invention further provides a preferred embodiment of the pin body 10, wherein the pin body 10 includes a plug section 11, an elastic expanding section 12 connected to the tail of the plug section 11 and expanding outward relative to the plug section 11, and a connecting section 13 connected to the tail of the elastic expanding section 12; it should be noted here that the outward expansion of the elastic outward expansion section 12 relative to the plug section 11 means that the maximum outer diameter of the elastic outward expansion section 12 is larger than the maximum outer diameter of the plug section 11; the plug section 11 can pass through the insertion hole of the PCB board 60; the elastic flaring segment 12 can generate inward shrinkage elastic change under the action of external force to enter the jack of the PCB 60, and it should be noted that the inward shrinkage of the elastic flaring segment 12 means that the elastic flaring segment 12 shrinks towards the central axis direction; elasticity expands section 12 outward and can recover in order to rise the jack of tight PCB board 60, promptly, elasticity expands section 12 outward and produces the elastic stress that outwards recovers after the shrink, this elastic stress realizes the jack of tight PCB board 60 that rises, promptly, realize contact pin body 10 and PCB board 60 fixed connection, at this moment, connection between the two adopts flexonics, can reduce PCB board 60 because of vibrations when deformation and contact pin body 10 between pull the power, in order to reduce PCB board 60 and damage or the possibility of contact pin body 10 rupture.

It should be noted that, in order to ensure the connection strength between the pin body 10 and the PCB 60 when the PCB pin is used, before the PCB pin is used, a vibration environment for actual use is simulated, and the assembled PCB pin and the assembled PCB 60 are subjected to a vibration test; meanwhile, the expansion force of the jack of the PCB can be controlled by adjusting the outer diameter of the elastic outward-expanding section 12, so that the connection strength between the two is adjusted.

Specifically, the longitudinal section of the elastic outward-expanding section 12 is elliptical, a hollow structure 121 penetrating through two opposite side surfaces of the elastic outward-expanding section 12 is formed in the middle of the elastic outward-expanding section 12, and the hollow structure 121 provides an inward contraction space for the elastic outward-expanding section 12; here, the side surface of the elastically flaring segment 12 refers to a surface thereof facing in the horizontal direction.

The utility model also discloses an inverter, which comprises a shell, a PCB 60 and the PCB pins, wherein the PCB 60 and the PCB pins are arranged in the shell; the PCB pins enable the assembly to be convenient; specifically, the bottom plate 30 is ultrasonically welded to the bottom surface of the housing, and compared with a conventional reflow soldering method, the problem that the mounting position of the bottom plate 30 is shifted due to the flowing of liquid solder paste in the reflow soldering process can be solved, that is, the mounting accuracy of the pin body 10 is improved, meanwhile, the ultrasonic welding method can provide more stable and reliable connection strength, avoid application risks such as shifting and falling of the pin body 10, and improve the yield of products; the PCB board 60 is installed on the housing, and the insertion hole of the PCB board 60 is fixedly sleeved outside the pin body 10, and the two are electrically conducted.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.

Claims

1. A PCB contact pin is characterized in that: comprises a contact pin body, an elastic buffer part and a bottom plate; the pin body and the elastic buffer part are sequentially connected end to end along the vertical direction; the bottom plate is horizontally arranged and is connected with the tail part of the elastic buffer part; the elastic buffer part can be elastically compressed and deformed along the vertical direction under the action of external force; the pin body is used for fixing and inserting an external PCB, and the tail part of the pin body extends downwards to form a limiting column; the limiting column is in a suspended state when the elastic buffering part is not elastically compressed and deformed.

2. The PCB pin of claim 1, wherein: the bottom plate is in smooth transition connection with the elastic buffer part.

3. The PCB pin of claim 1, wherein: the bottom plate is made of metal materials.

4. The PCB pin of claim 3, wherein: the elastic buffer part is positioned on one side of the bottom plate, and the area of the elastic buffer part on the top surface of the bottom plate where the projection is positioned is a projection area; the edge of the other side of the projection area close to the bottom plate is formed into a positioning edge; one side of the bottom plate is sunken to the other side to form a U-shaped notch; the bottom surface of the U-shaped notch is positioned on the same straight line with the edge of the top surface of the bottom plate and the positioning edge.

5. The PCB pin of claim 1, wherein: the elastic buffer part comprises at least one U-shaped bent section, and the opening of the U-shaped bent section faces to the horizontal direction.

6. The PCB pin of claim 5, wherein: the number of the U-shaped bending sections is two; the two U-shaped bending sections are vertically arranged and form an S shape.

7. The PCB pin of claim 5, wherein: the number of the elastic buffer parts is two, and the two elastic buffer parts are arranged on two sides of the limiting column.

8. The PCB pin of claim 1, wherein: the contact pin body comprises a plug section, an elastic outward-expanding section and a connecting section, wherein the elastic outward-expanding section is connected with the tail part of the plug section and expands outwards relative to the plug section; the plug section can penetrate through the jack of the PCB; the elastic outward-expanding section can generate inward-shrinkage elastic change under the action of external force to enter the jack of the PCB and can recover to tension the jack of the PCB; the connecting section is respectively connected with the elastic buffer part and the limiting column.

9. The PCB pin of claim 8, wherein: the longitudinal section of the elastic outward-expanding section is in an ellipse-like shape, and a hollow structure penetrating through two opposite side faces of the elastic outward-expanding section is arranged in the middle of the elastic outward-expanding section.

10. An inverter, characterized by: comprising a housing, and a PCB board and a PCB pin according to any of claims 1-9 both disposed within the housing; the bottom plate is welded to the bottom surface of the shell through ultrasonic waves; the PCB board is installed on the shell, and the jack of PCB board is fixed the suit and is in outside the contact pin body.