CN216698792U

CN216698792U - Terminal and electric connector

Info

Publication number: CN216698792U
Application number: CN202123030095.6U
Authority: CN
Inventors: 霍柱东; 许通道
Original assignee: Heshan Derun Electronic Technology Co ltd
Current assignee: Heshan Derun Electronic Technology Co ltd
Priority date: 2021-12-02
Filing date: 2021-12-02
Publication date: 2022-06-07
Anticipated expiration: 2031-12-02

Abstract

The embodiment of the utility model relates to an electric connector, and provides a terminal and an electric connector, wherein the terminal comprises a base part, an elastic arm, a contact part and a guide connection part, wherein the elastic arm is formed by extending upwards from the base part and obliquely towards one side of the thickness direction of the base part; the contact part extends upwards from the elastic arm and is used for being electrically connected with the chip module; the guide connection part extends downwards from the base part and is used for being welded with the circuit board, and the guide connection part comprises a welding section and a bending section for connecting the welding section with the base part; the electrical connector includes a dielectric body and a terminal. According to the embodiment of the utility model, the bending section is added on the guide connection part, so that the connection relation between the welding section and the base part can be improved, and the elasticity between the welding section and the base part is increased, thereby reducing the stress between the welding section and the circuit board, reducing the risk of separation of the welding section and the solder ball, and prolonging the service life of the electric connector.

Description

Terminal and electric connector

Technical Field

The present invention relates to electrical connectors, and particularly to a terminal and an electrical connector.

Background

At present, a terminal assembled in an electrical connector generally has a conductive connection portion directly bent on a terminal body, the conductive connection portion is rigidly connected to the terminal body, the terminal body is fixed in a plastic structure, and the conductive connection portion is soldered on a circuit board through a solder ball. In the daily work process of the electric connector, movable parts such as a cooling fan can vibrate in the work process, so that stress with constantly changing directions can be generated between the plastic structure and the circuit board, the stress with constantly changing directions for a long time can lead the solder ball to generate metal fatigue, and further lead the connecting part to be detached from the welding, and the service life of the electric connector can be seriously shortened.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problems, embodiments of the present invention provide a terminal and an electrical connector, which have small inductive reactance and low impedance, enhance the transmission effect of high frequency signals, reduce the shaking of the terminal, and avoid short circuit caused by mutual contact of the terminals.

The embodiment of the utility model adopts the following technical scheme for solving the technical problems:

in one aspect, a terminal for being received in an insulative housing of an electrical connector is provided, the terminal including a base portion, a resilient arm, a contact portion, and a contact portion, wherein the base portion defines a length direction, a width direction, and a thickness direction that are perpendicular to each other, and the length direction is parallel to the up-down direction; the elastic arm extends upwards from the base part and slantways extends towards one side of the thickness direction of the base part; the contact part extends upwards from the elastic arm and is used for being electrically connected with the chip module; the guide connection part is formed by downwards extending the base part and is used for being welded with a circuit board, and the guide connection part comprises a welding section and a bending section for connecting the welding section with the base part.

Optionally, one side of the welding section facing the thickness direction of the base protrudes from the base surface, and the other side of the bending section facing the thickness direction of the base protrudes from the base surface.

Optionally, a rectangular notch is formed in the bottom of the base, and the bending section is connected to the bottom of the notch.

Optionally, the elastic arm is provided with a through limiting hole along the thickness direction of the elastic arm, and the limiting hole extends to the top surface of the base, so as to divide the bottom of the elastic arm into two sub-arms arranged at an interval.

Optionally, the distance between the two sub-arms is larger than the width of the contact part.

Alternatively, one side of the base in the width direction is provided with a bending stopper near the bottom surface of the base, the bending stopper being bent toward the side where the elastic arm is bent.

Optionally, the top end of the contact portion is bent toward the bottom of the base portion, and the tip end of the contact portion is lower than the highest point of the contact portion in the height direction.

On the other hand, an electrical connector is provided, which comprises an insulating body and the terminal as described above, wherein the insulating body is provided with a plurality of accommodating grooves which penetrate through the insulating body from top to bottom, the accommodating grooves are arranged on the insulating body in a plurality of rows, and one side of the top of each accommodating groove is provided with a limiting column; the quantity of terminal is a plurality of, a plurality of the terminal be the multirow set up in insulator is last, spacing hole has been seted up to the terminal, spacing hole with spacing post cooperation.

Optionally, one side of the base portion in the width direction is provided with a positioning inclined plane, and a matching inclined plane is arranged in the accommodating groove and used for abutting against the positioning inclined plane.

Optionally, the receiving slots in the same row are arranged at equal intervals, and the receiving slots in two adjacent rows are staggered.

Different from the situation of the related art, the terminal and the electrical connector in the embodiment of the utility model can improve the connection relationship between the soldering section and the base part and increase the elasticity between the soldering section and the base part by adding the bending section on the guide connection part, thereby reducing the stress between the soldering section and the circuit board, reducing the risk of separation of the soldering section from the solder ball and prolonging the service life of the electrical connector.

Drawings

Fig. 1 is a schematic structural view of a terminal of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of another perspective of a terminal according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a terminal of another embodiment of the present invention;

FIG. 4 is a schematic view of a portion of an electrical connector according to an embodiment of the present invention;

FIG. 5 is a partial structural view of an insulator according to an embodiment of the utility model;

fig. 6 is a cross-sectional view of a portion of an electrical connector according to an embodiment of the present invention.

Detailed Description

In order to facilitate an understanding of the utility model, the utility model is described in more detail below with reference to the accompanying drawings and specific examples. It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for descriptive purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and fig. 2, a terminal 100 according to an embodiment of the present invention is configured to be received in an insulating housing 200 of an electrical connector, where the terminal 100 includes a base 1, a resilient arm 2, a contact portion 3, and a connecting portion 4. The base portion 1 is used for holding the terminal 100, the contact portion 3 is used for electrically connecting with a chip module, the elastic arm 2 is used for providing elastic force to ensure that the contact portion 3 is tightly contacted with the chip module, and the connecting portion 4 is used for welding with a circuit board, so as to indirectly electrically connect the chip module and the circuit board.

The base 1 is defined with a longitudinal direction, a width direction and a thickness direction which are perpendicular to each other, and the longitudinal direction is parallel to the vertical direction; one side of the base 1 in the width direction is provided with a bending stopper 11 near the bottom surface of the base 1, and the bending stopper 11 is bent toward the side where the elastic arm 2 is bent. The bending stopper 11 is used for contacting with the insulating body 200, so that the contact area between the terminal 100 and the insulating body 200 is increased, and the stability of fixing the terminal 100 is improved; the capacitance effect between the bending stop 11 and the base 1 can be improved, the impedance of the terminal 100 can be improved, the coupling effect between adjacent terminals 100 can be enhanced, the impedance of the whole electric connector 300 can be adjusted and controlled, and the high-frequency performance can be improved.

In some embodiments, the bottom of the base 1 is provided with a rectangular notch 12, and by providing the notch 12, the length of the guide portion 4 can be extended, the elasticity of the guide portion 4 can be increased, and the risk of separation of the guide portion 4 from the solder ball can be reduced.

For the above elastic arm 2, the elastic arm 2 is formed by extending upward from the base 1 and obliquely toward one side of the thickness direction of the base 1, a penetrating limiting hole 22 is formed in the elastic arm 2 along the thickness direction of the elastic arm, and the limiting hole 22 extends to the top surface of the base 1, so as to divide the bottom of the elastic arm 2 into two sub-arms 21 arranged at intervals. The elastic arm 2 is bifurcated at the bottom, so that the width of the elastic arm 2 can be increased under the condition of ensuring the elastic performance, the original slender structure is improved, the inductive reactance is reduced, the impedance of the elastic arm 2 is reduced, the transmission effect of high-frequency signals of the electric connector 300 is enhanced, and the high-frequency performance is improved.

Particularly, by providing the limiting hole 22, the limiting hole 22 can be used to stabilize the elastic arm 2, so as to reduce the shake of the elastic arm 2 along the direction parallel to the upper surface of the insulating body 200, thereby preventing the adjacent terminals 100 from contacting each other and causing short circuit.

In some embodiments, the separation between the two sub-arms 21 is greater than the width of the contact portion 3. In the spacing direction of the sub-arms 21, the bending resistance of the elastic arms 2 can be enhanced, the shake of the elastic arms 2 along the direction can be reduced, and the short circuit caused by the mutual contact of the adjacent terminals 100 can be avoided; the width of the elastic arm 2 can be widened by adjusting the width of the limiting hole 22, so that the distance between the adjacent elastic arms 2 of the terminals 100 is shortened while the mechanical performance is ensured, the coupling effect between the adjacent terminals 100 is enhanced, and the impedance of the whole electrical connector 300 is further reduced.

In particular, the position-limiting hole 22 between the two sub-arms 21 can directly expose the top of the base 1, so as to be a force application point for mounting the terminal 100.

In one embodiment, the top surface of the elastic arm 2 and the side wall of the limiting hole 22 adjacent to the top surface are provided with an upward convex arc surface, and two ends of the arc surface along the circumferential direction are respectively connected with the two sub-arms 21, so that the top of the elastic arm 2 is in a "C" shape. The top of the elastic arm is set to be C-shaped, so that the cross section of a signal transmission path is uniformly changed, the stable continuity of the high-frequency characteristic impedance of the whole terminal can be improved, the fluctuation range of the high-frequency characteristic impedance is reduced, and the high-frequency performance is improved.

For the contact portion 3, the contact portion 3 extends upward from the elastic arm 2, and the top end of the contact portion 3 is bent toward the bottom of the base portion 1, so that the tip end of the contact portion 3 is lower than the highest point of the contact portion 3 in the height direction. The top of contact site 3 is crooked, can avoid owing to the sharp-pointed and fish tail in top of contact site 3 the chip module to the curved surface of bending type formation is smooth, reduce with resistance between the chip module makes the installation of chip module is more smooth and easy, avoids installing hard because of the resistance is too big, leads to contact site 3 to damage even.

For the above-mentioned lead-in part 4, the lead-in part 4 is formed by extending downward from the base 1, and the lead-in part 4 includes a welding section 41 and a bending section 42 joining the welding section 41 and the base 1. The soldering segment 41 is used for soldering with the circuit board, the bending segment 42 is used for elastically connecting the soldering segment 41, and by adding the bending segment 42, the connection relationship between the soldering segment 41 and the base 1 can be improved, and the elasticity between the soldering segment 41 and the base 1 is increased, so that the stress between the soldering segment 41 and the circuit board is reduced, the risk of separation of the soldering segment 41 from the solder ball is reduced, and the service life of the electrical connector 300 is prolonged.

In some embodiments, the welding section 41 protrudes from the surface of the base 1 toward one side in the thickness direction of the base 1, and the bending section 42 protrudes from the surface of the base 1 toward the other side in the thickness direction of the base 1. The welding section 41 and the bending section 42 respectively protrude out of two sides of the base 1, so that the stress direction of the bending section 42 is along the length direction of the base 1, extra stress is avoided, stress damage is reduced, and the service life is prolonged.

Referring to fig. 1 and 3, the bending sections 42 of the terminals 100 have two bending directions, and since the positions of the solder points on the circuit board are fixed, and the positions of the contact portions 3 relative to the insulating body 200 also need to be fixed, the positions of the solder points of the soldering sections 41 of the two terminals 100 are the same, but the positions of the base portions 1 relative to the circuit board are changed, so that the lengths of the elastic arms 2 of the two terminals 100 are different. The welding section 41 and the elastic arm 2 are arranged on the terminal 100 on the same side of the base 1, so that the strength and toughness are good, and the signal transmission length is long; the welding section 41 and the elastic arm 2 are respectively arranged on the terminals 100 on two sides of the base 1, so that the strength and toughness are poor, the signal transmission length is short, the loss is low, and the high-frequency performance is good.

In some embodiments, the bending segment 42 is connected to the bottom of the notch 12. The length of the bending section 42 is prolonged, the elasticity of the bending section 42 is increased, and the risk of separation of the guide connecting part 4 and the solder ball is reduced.

Referring to fig. 4, an electrical connector 300 according to an embodiment of the present invention includes an insulating housing 200 and the terminal 100 as described above, wherein the insulating housing 200 has a plurality of receiving slots 201 penetrating from top to bottom, and the plurality of receiving slots 201 are disposed on the insulating housing 200 in multiple rows; the number of the terminals 100 is several, and the several terminals 100 are disposed on the insulating body 200 in multiple rows. The terminals 100 are accommodated in the accommodating grooves 201, and are orderly arranged, stably fixed and convenient to package and transport.

For the above-mentioned insulation body 200, one side of the top of the accommodating groove 201 is provided with the limiting post 202, the terminal 100 is provided with the limiting hole 22, the limiting hole 22 is matched with the limiting post 202, so as to stabilize the elastic arm 2, reduce the shake of the elastic arm 2 along the direction parallel to the upper surface of the insulation body 200, and avoid the adjacent terminals 100 from contacting each other and causing short circuit.

In one embodiment, the receiving slots 201 in the same row are arranged at equal intervals, and the receiving slots 201 in two adjacent rows are staggered. The staggered arrangement of the accommodating slots 201 can avoid the mutual interference between the terminals 100 in two adjacent rows, and can also make full use of the space of the insulating body 200, which can be used to reduce the size of the insulating body 200 or increase the size of the terminals 100.

In the terminal 100, one side of the base 1 in the width direction is provided with a positioning inclined surface 13, and a fitting inclined surface 203 is provided in the receiving groove 201, and the fitting inclined surface 203 is configured to abut against the positioning inclined surface 13. The positioning inclined surface 13 of the terminal 100 abuts against the engagement inclined surface 203 of the housing groove 201, so that the position of the terminal 100 in the housing groove 201 in the longitudinal direction can be positioned, and the assembly accuracy can be improved.

In the terminal 100 and the electrical connector 300 of the present invention, the bending section 42 is added to the connecting portion 4, so that the connection relationship between the soldering section 41 and the base portion 1 can be improved, the elasticity between the soldering section 41 and the base portion 1 can be increased, the stress between the soldering section 41 and the circuit board can be reduced, the risk of the solder ball separating from the soldering section 41 can be reduced, and the service life of the electrical connector 300 can be prolonged. Moreover, the elastic arm 2 is provided with a forked bottom, so that the width of the elastic arm 2 can be increased under the condition of ensuring the elastic performance, the original slender structure is improved, the inductive reactance is reduced, the impedance of the elastic arm 2 is reduced, and the transmission effect of high-frequency signals of the electric connector 300 is enhanced; meanwhile, the limiting hole 22 can be matched with the limiting column 202, so that the elastic arm 2 is stabilized, the shake of the elastic arm 2 in the direction parallel to the upper surface of the insulating body 200 is reduced, and the short circuit caused by the mutual contact of the adjacent terminals 100 is avoided.

In one embodiment, the method of forming the terminal 100 of the present invention comprises the steps of: punching a plate to obtain a blank; bending the bending stop block part of the blank at least once through a preset angle; bending the lead portion and the contact portion of the blank; die cutting a base portion of the blank; bending the elastic arm portion of the blank; the elastic arm portion is adjusted.

It should be noted that the description of the present invention and the accompanying drawings illustrate preferred embodiments of the present invention, but the present invention may be embodied in many different forms and is not limited to the embodiments described in the present specification, which are provided as additional limitations to the present invention and to provide a more thorough understanding of the present disclosure. Moreover, the above technical features are combined with each other to form various embodiments which are not listed above, and all the embodiments are regarded as the scope of the present invention described in the specification; further, modifications and variations will occur to those skilled in the art in light of the foregoing description, and it is intended to cover all such modifications and variations as fall within the true spirit and scope of the utility model as defined by the appended claims.

Claims

1. A terminal for being received in an insulative housing of an electrical connector, comprising:

a base portion defining a length direction, a width direction and a thickness direction which are perpendicular to each other, the length direction being parallel to the up-down direction;

an elastic arm extending upward from the base and obliquely toward one side in the thickness direction of the base;

the contact part extends upwards from the elastic arm and is used for being electrically connected with the chip module;

the guide connection part extends downwards from the base part and is used for being welded with a circuit board, and the guide connection part comprises a welding section and a bending section which is used for connecting the welding section with the base part.

2. The terminal of claim 1, wherein the soldering section projects from the base surface toward one side in the thickness direction of the base, and the bending section projects from the base surface toward the other side in the thickness direction of the base.

3. The terminal of claim 1, wherein the bottom of the base defines a rectangular notch, and the bent section is connected to the bottom of the notch.

4. The terminal of claim 1, wherein the elastic arm is provided with a through hole along a thickness direction thereof, and the hole extends to a top surface of the base to divide a bottom of the elastic arm into two sub-arms arranged at intervals.

5. A terminal according to claim 4, wherein the sub-arms are spaced apart by a distance greater than the width of the contact portion.

6. The terminal according to claim 1, wherein a side of the base portion in the width direction is provided with a bending stopper near a bottom surface of the base portion, the bending stopper being bent toward a side at which the elastic arm is bent.

7. A terminal according to claim 1, wherein the tip of the contact portion is bent toward the bottom of the base portion such that the tip of the contact portion is lower than the highest point of the contact portion in the height direction.

8. An electrical connector, comprising:

the insulation body is provided with a plurality of accommodating grooves which penetrate through the insulation body from top to bottom, the accommodating grooves are arranged on the insulation body in a plurality of rows, and one side of the top of each accommodating groove is provided with a limiting column;

the terminal as claimed in any one of claims 1 to 7, wherein the number of the terminals is several, several of the terminals are disposed on the insulating body in multiple rows, the terminal is provided with a limiting hole, and the limiting hole is engaged with the limiting post.

9. The electrical connector of claim 8, wherein one side of the base portion in the width direction is provided with a positioning inclined surface, and a mating inclined surface is provided in the receiving groove, and the mating inclined surface is configured to abut against the positioning inclined surface.

10. The electrical connector of claim 8, wherein the receiving slots in the same row are equally spaced, and the receiving slots in two adjacent rows are staggered.