Terminal with stable signal transmission and high-frequency connector

Abstract

The utility model relates to a terminal with stable signal transmission. The terminal comprises a holding part, an inserting part and a welding part, the inserting part is fixedly connected to one end of the fixing part, one end of the welding part is fixedly connected to the other end of the fixing part, and the free end of the welding part is used for being welded to a circuit board; one surface of the welding part in contact with the circuit board bonding pad is a straight surface, and one surface of the welding part far away from the circuit board bonding pad is an inclined surface. According to the terminal with stable signal transmission, the welding surface of the terminal is subjected to planarization processing and is in stable contact with the bonding pad, and the welding back surface of the terminal is arranged to be an inclined surface, so that the sectional area or the volume of the welding end of the terminal is reduced, and after the welding end of the terminal is subjected to solder paste welding, the volume is still very small, and the influence on characteristic impedance is relatively small; and the terminal signal transmission is stable and is not easy to distort. The utility model also relates to a high-frequency connector comprising the terminal.

Description

Technical Field

[0001] The utility model relates to the field of connectors, in particular to a terminal with stable signal transmission and a high-frequency connector. Background Art

[0002] In existing high-frequency connectors, the solder end of the terminal conductor contacts the pad on the circuit board and is soldered with solder paste. The volume or cross-sectional area of ​​this area increases significantly, which increases the capacitance during signal transmission, causing the characteristic impedance to decrease and the consistency with the characteristic impedance of the entire circuit to deteriorate, which can easily cause signal distortion. Summary of the Invention

[0003] Based on this, the purpose of the present invention is to provide a terminal and a high-frequency connector with stable signal transmission, which have the advantage of stable signal transmission.

[0004] A terminal with stable signal transmission comprises a holding portion, an inserting portion, and a welding portion; the inserting portion is fixedly connected to one end of the holding portion, one end of the welding portion is fixedly connected to the other end of the holding portion, and the free end thereof is used for welding to a circuit board; the side of the welding portion in contact with the circuit board pad is arranged as a straight surface, and the side of the welding portion away from the circuit board pad is arranged as an inclined surface. The terminal with stable signal transmission described in the utility model is provided with a flattened terminal welding surface to ensure stable contact with the pad, and an inclined surface is provided on the back side of the terminal welding surface, so that the cross-sectional area or volume of the terminal welding end is reduced. When the terminal welding end is soldered with solder paste, the volume remains very small, which has little effect on the characteristic impedance, making the terminal signal transmission stable and not easily distorted.

[0005] Furthermore, it further comprises a stop portion fixedly connected to one end of the holding portion away from the insertion portion; the stop portion and the welding portion are arranged on opposite sides of the holding portion. The stop portion is used to stop the terminal insertion.

[0006] Furthermore, a stepped protrusion is provided at the connection between the side surface of the welding portion away from the inserting portion and the holding portion, so as to improve the characteristic impedance mutation of the welding portion.

[0007] Furthermore, arc-shaped notches are provided at the corners where the welding portion protrudes from the holding portion and at the corners where the stop portion protrudes from the holding portion, so as to improve the mechanical stress concentration of the terminal and prevent the terminal from breaking.

[0008] A high-frequency connector comprises an insulating body, the above-mentioned terminals with stable signal transmission, and a ground shielding plate; a plurality of the terminals are inserted into the insulating body, arranged in two rows of upper and lower terminals, with the upper and lower terminals symmetrically arranged vertically; the retaining portion, the inserting portion, and the stopping portion are located within the insulating body, the welding portion is exposed at the rear end face of the insulating body, and the upper and lower welding portions are separated from each other; the ground shielding plate is inserted into the insulating body and located between the upper and lower terminals. The connector with stable signal transmission described in the utility model has symmetrically distributed upper and lower terminals, and a ground shielding plate is provided between the upper and lower terminals to prevent signal crosstalk and increase the stability of high-frequency signal transmission.

[0009] Furthermore, the insulating body is provided with two terminal slots spaced apart from each other, the slots extending through the front and rear ends of the insulating body, with the upper and lower rows of terminals respectively inserted into the two slots; the front ends of the slots are provided with stop steps, and the rear ends of the slots are provided with stop grooves, with the stop portions being snapped into the stop grooves. Both the stop grooves and the stop steps are used to stop the terminals during insertion.

[0010] Furthermore, the opposite inner wall surfaces of the terminal slot are provided with anti-retraction grooves, and the retaining portion is provided with a card point or a first protrusion that cooperates with the anti-retraction grooves, so that the terminal inserted into the insulating body is not easy to move backward and fall off.

[0011] Furthermore, the upper and lower end surfaces of the insulating body each have a hollowed-out area near the rear, with one end of the hollowed-out area connected to the upper or lower end surface of the insulating body, and the other end of the hollowed-out area connected to the rear end surface of the insulating body. The terminal is inserted into the terminal slot, with the soldering portion facing away from the circuit board pad facing the hollowed-out area. The hollowed-out area increases the air volume at the terminal soldering end, reducing the dielectric constant and increasing the inductance during signal transmission, thereby improving the matching of the characteristic impedance at this location with the characteristic impedance of the entire circuit.

[0012] Furthermore, the insulating body is provided with a plurality of shielding slots, and the plurality of shielding slots are located between the two terminal slots; the grounding shielding plate includes a connecting portion and a plurality of shielding portions fixedly connected to the same side of the connecting portion at intervals, the shielding portion is inserted into the shielding slot, and the connecting portion abuts the rear end of the insulating body.

[0013] Furthermore, a locking groove is provided at the rear end of the shielding slot, a second protrusion is provided on the shielding portion, the shielding portion is inserted into the shielding slot, and the second protrusion is locked in the locking groove.

[0014] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic structural diagram of the high-frequency connector of this application;

[0016] Figure 2 An exploded view of the high-frequency connector of this application;

[0017] Figure 3 This is a schematic diagram of the structure of the terminal of this application;

[0018] Figure 4 This is a longitudinal cross-sectional view of the high-frequency connector of the present application.

[0019] In the picture:

[0020] 1-insulating body; 11-terminal slot; 111-stop step; 112-stop groove; 12-shielding slot; 13-hollowed area;

[0021] 2-terminal; 21-holding portion; 211-card point; 212-first protrusion; 213-arc-shaped notch; 22-insertion portion; 23-stop portion; 24-welding portion; 241-stepped protrusion;

[0022] 3-ground shielding plate; 31-connecting portion; 32-shielding portion; 321-second protrusion;

[0023] 4- Circuit board. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] In the description of this utility model, it should be noted that the terms "vertical," "upper," "lower," and "horizontal," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections, direct connections, connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0027] See also Figure 1-4 The present application provides a high-frequency connector with stable signal transmission, comprising an insulating body 1, a plurality of terminals 2, and a ground shield plate 3. The plurality of terminals 2 are inserted into the insulating body 1. In this embodiment, the plurality of terminals 2 are arranged in two parallel rows, an upper row of terminals and a lower row of terminals, and the upper and lower rows of terminals are symmetrically arranged. The ground shield plate 3 is inserted into the insulating body 1, located between the upper and lower rows of terminals, and is used to shield the high-speed signals between the upper and lower rows from interfering with each other.

[0028] Two terminal slots 11 are provided on the insulating body 1, which are spaced apart from each other. The terminal slots 11 pass through the front and rear end surfaces of the insulating body 1 and are perpendicular to the rear end surface of the insulating body 1. In this embodiment, the two terminal slots 11 are symmetrically arranged, so that the overall force of the connector is uniform and it is more stable when installed on the circuit board 4. The upper row of terminals and the lower row of terminals are respectively inserted into the two terminal slots 11.

[0029] Furthermore, a stop step 111 is provided at the front end of the terminal slot 11 , and a stop groove 112 is provided at the rear end of the terminal slot 11 . Both the stop step 111 and the stop groove 112 are used for inserting and stopping the terminal 2 .

[0030] Furthermore, first anti-retraction grooves are provided on the upper and lower inner walls of the terminal slot 11 to prevent the terminal 2 from moving backward and falling after being inserted into the terminal slot 11. Furthermore, second anti-retraction grooves are provided on the left and right inner walls of the terminal slot 11.

[0031] Furthermore, the insulating body 1 is provided with a plurality of shielding slots 12, which are located between the two terminal slots 11 and are used to insert the ground shielding plate 3. Furthermore, the rear end of the shielding slot 12 is provided with a locking groove for locking with the ground shielding plate 3 to fix it to the insulating body 1.

[0032] Furthermore, a hollow area 13 is provided on the rear side of the upper and lower end surfaces of the insulating body 1, one end of the hollow area 13 is connected to the upper end surface or the lower end surface of the insulating body 1, and the other end of the hollow area 13 is connected to the rear end surface of the insulating body 1, and its width is greater than the width of a row of terminal slots 11. In this embodiment, the longitudinal section of the hollow area 13 is V-shaped, one side of the V-shape is connected to the upper end surface of the insulating body 1, and the other side of the V-shape is connected to the rear end surface of the insulating body 1, and the bottom of the V-shape is protruding outward. In the present application, the provision of the hollow area 13 can increase the air volume filling at the welding end of the terminal 2, reduce the dielectric constant, increase its inductance during signal transmission, and increase the matching of the characteristic impedance here with the characteristic impedance of the entire circuit.

[0033] The terminal 2 includes a holding portion 21, an inserting portion 22, a stop portion 23 and a welding portion 24. In this embodiment, the holding portion 21, the inserting portion 22, the stop portion 23 and the welding portion 24 are located on the same plane. The upper and lower ends of the holding portion 21 are provided with a card point 211 for cooperating with the first stop groove; the side wall surface of the holding portion 21 is provided with a first protrusion 212 for cooperating with the second stop groove. One end of the inserting portion 22 is fixedly connected to the front end of the holding portion 21, and the other end of the inserting portion 22 is bent to one side in a hook shape for contacting other connector conductors. The stop portion 23 and the welding portion 24 are both fixedly connected to the end of the holding portion 21 away from the inserting portion 22, and are respectively provided on both sides of the holding portion 21.

[0034] During assembly, the terminal 2 is inserted into the terminal slot 11 from the rear of the insulating body 1, the retaining portion 21 and the insertion portion 22 are located in the terminal slot 11, the stop portion 23 is located in the stop groove 112, the card point 211 is locked in the first stop groove, the first protrusion 212 is located in the second stop groove, and the welding portion 24 protrudes from the outside of the insulating body 1 and is set in the direction away from the ground shielding plate 3.

[0035] Furthermore, the side of the soldering portion 24 facing away from the insertion portion 22 is straight, ensuring stable contact and soldering with the solder pads on the circuit board 4. Furthermore, the side of the soldering portion 24 facing away from the stop portion 23 and closer to the insertion portion 22 is inclined. When the terminal 2 is inserted into the terminal slot 11, this inclined surface faces the hollowed-out area 13. This inclined surface configuration causes the longitudinal cross-sectional width of the soldering portion 24, along the insertion direction of the terminal 2, to gradually narrow from the point of connection with the retaining portion 21 toward a direction away from the retaining portion 21. After soldering to the solder pads on the circuit board 4, the soldering portion 24 retains a relatively small volume or cross-sectional area after being coated with solder paste, minimizing the impact on the characteristic impedance and ensuring more stable high-frequency signal transmission.

[0036] Furthermore, a stepped protrusion 241 is provided at the connection between the side surface of the soldering portion 24 away from the inserting portion 22 and the holding portion 21 . The stepped protrusion 241 is beneficial for improving the characteristic impedance mutation of the soldering portion 24 .

[0037] Furthermore, arc-shaped notches 213 are provided at the corners where the welding portion 24 protrudes from the retaining portion 21 and at the corners where the stop portion 23 protrudes from the retaining portion 21 . The arc-shaped notches 213 are used to improve mechanical stress concentration of the terminal 2 and prevent the terminal 2 from breaking.

[0038] The ground shield plate 3 includes a connecting portion 31 and several shielding portions 32. One end of each of the shielding portions 32 is fixedly connected to the connecting portion 31 and spaced apart on the same side of the connecting portion 31. Furthermore, a second protrusion 321 is provided on the end of the shielding portion 32 near the connecting portion 31, which is configured to engage with a retaining groove. During assembly, the ground shield plate 3 is inserted from the rear of the insulating body 1, with the shielding portion 32 inserted into the shielding slot 12. The connecting portion 31 abuts the rear end of the insulating body 1, and the second protrusion 321 engages in the retaining groove, securing the ground shield plate 3 to the insulating body 1.

[0039] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous modifications and improvements without departing from the concept of the present invention, and the present invention is intended to encompass such modifications and variations.

Claims

1. A terminal with stable signal transmission, characterized by: It includes a holding part, an inserting part and a welding part; the inserting part is fixedly connected to one end of the holding part, one end of the welding part is fixedly connected to the other end of the holding part, and its free end is used for welding with the circuit board; the side of the welding part that contacts the circuit board pad is a straight surface, and the side of the welding part away from the circuit board pad is an inclined surface.

2. The terminal with stable signal transmission according to claim 1, characterized in that: It also includes a stop portion, which is fixedly connected to one end of the holding portion away from the inserting portion; the stop portion and the welding portion are arranged on opposite sides of the holding portion.

3. The terminal with stable signal transmission according to claim 2, characterized in that: A stepped protrusion is provided at a connection between a side surface of the welding portion away from the inserting portion and the holding portion.

4. The terminal with stable signal transmission according to claim 2, characterized in that: The corner where the welding portion protrudes from the holding portion and the corner where the stopping portion protrudes from the holding portion are both provided with arc-shaped notches.

5. A high-frequency connector, characterized in that: It includes an insulating body, several signal transmission stable terminals as described in any one of claims 2-4, and a grounding shielding plate; several of the terminals are inserted into the insulating body, distributed in two rows of upper and lower rows of terminals, and the upper and lower rows of terminals are symmetrically arranged; the retaining portion, the inserting portion and the stopping portion are located in the insulating body, the welding portion is exposed at the rear end face of the insulating body, and the upper row of welding portions and the lower row of welding portions are separated from each other; the grounding shielding plate is inserted into the insulating body, and is located between the upper row of terminals and the lower row of terminals.

6. The high-frequency connector according to claim 5, characterized in that: The insulating body is provided with two terminal grooves spaced apart in an upper and lower manner, and the terminal grooves pass through the front and rear end surfaces of the insulating body, and the upper row terminals and the lower row terminals are respectively inserted into the two terminal grooves; the front end of the terminal groove is provided with a stop step, and the rear end of the terminal groove is provided with a stop groove, and the stop part is clamped in the stop groove.

7. The high-frequency connector according to claim 6, characterized in that: Relative inner wall surfaces of the terminal slot are each provided with a stop groove, and the retaining portion is provided with a card point or a first protrusion that cooperates with the stop groove.

8. The high-frequency connector according to claim 7, characterized in that: The upper and lower end surfaces of the insulating body are both provided with hollow areas on the rear side, one end of the hollow area is connected to the upper end surface or the lower end surface of the insulating body, and the other end of the hollow area is connected to the rear end surface of the insulating body; the terminal is inserted into the terminal slot, and the side of the welding part away from the circuit board pad faces the hollow area.

9. The high-frequency connector according to claim 8, characterized in that: The insulating body is provided with a plurality of shielding slots, and the plurality of shielding slots are located between the two terminal slots; the grounding shielding plate includes a connecting portion and a plurality of shielding portions fixedly connected to the same side of the connecting portion at intervals, the shielding portion is inserted into the shielding slot, and the connecting portion abuts against the rear end of the insulating body.

10. The high-frequency connector according to claim 9, characterized in that: A locking groove is provided at the rear end of the shielding slot, a second protrusion is provided on the shielding portion, the shielding portion is inserted into the shielding slot, and the second protrusion is locked in the locking groove.

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