Signal terminal and electric connector

Abstract

The utility model discloses a signal terminal and an electric connector, the electric connector comprises a plurality of terminal modules, each terminal module is internally provided with two signal terminals, each signal terminal comprises a main body part and an attachment part which are attached to each other, a first elastic arm extending from the main body part, and a second elastic arm extending from the attachment part, the first elastic arm and the second elastic arm counteract the opposite sliding force in contact with the circuit board, a double-signal transmission path is formed, and the transmission rate is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a signal terminal and electric connector, especially a signal terminal and electric connector used to elastically abut circuit board. BACKGROUND

[0002] The existing electric connector used to transmit high-speed signals generally has a plurality of signal terminals, each of which includes a main body part, a contact part extending from one end of the main body part, and an elastic arm extending from the other end of the main body part, and the elastic arm is provided with an abutting part used to abut a conductive pad of the circuit board to form an electrical connection.

[0003] However, the plurality of elastic arms of the plurality of signal terminals are arranged in a single direction by bending and extending, and when the electric connector is installed on the circuit board, a plurality of sliding forces in the same direction are easily generated, which causes the plurality of abutting parts to be easily misaligned with the plurality of conductive pads, is not conducive to stable contact between the signal terminal and the circuit board, and the elastic arm is often formed by bending once from the main body part, the force arm is short, and the elastic performance is poor when the elastic arm is elastically compressed in contact with the circuit board, which is not conducive to maintaining good elasticity of the electric connector after multiple disassembly and assembly, and as the requirement for high-speed transmission rate of the electric connector in the electronic industry is increasing, the signal terminal is provided with only one elastic arm for conduction with the circuit board, and a single conductive path is not conducive to further improving the transmission rate of the signal terminal.

[0004] Therefore, it is necessary to design an improved signal terminal and electric connector to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] In view of the problems in the background art, the purpose of the utility model is to provide a signal terminal and electric connector provided with a first elastic arm and a second elastic arm to offset the opposite sliding force during installation and form a double signal transmission path.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a signal terminal used to be electrically connected with a circuit board, including a main body part, a contact part extending from one end of the main body part, a first elastic arm extending from the other end of the main body part, the first elastic arm including a first extension arm bent and extending from the main body part and a first abutting arm reversely bent and extending from the first extension arm, an attachment part fixedly connected to the main body part near the first elastic arm, the attachment part being integrally or separately formed with the main body part, the attachment part being attached to the main body part along the thickness direction thereof, a second elastic arm extending from one end of the attachment part, the second elastic arm including a second extension arm extending from the attachment part in a direction away from the first extension arm and a second abutting arm extending from the second extension arm toward the first abutting arm, the first abutting arm having a first abutting part, the second abutting arm having a second abutting part, and the first abutting part and the second abutting part being coplanar to be electrically connected to the same conductive path of the circuit board.

[0007] Further, two through-slots are formed through the thickness direction of the first extension arm and the second extension arm, respectively, one of which extends to the bent connection between the first extension arm and the main body portion in the first direction, and the other of which extends to the bent connection between the second extension arm and the attachment portion in the first direction.

[0008] Further, a first abutting portion is formed at the tip of the first abutting arm, and a second abutting portion is formed at the tip of the second abutting arm, the first abutting portion and the second abutting portion abutting the same conductive pad of the circuit board.

[0009] Further, the first abutting arm extends beyond one side of the main body portion in the extension direction thereof, and the second abutting arm extends beyond one side of the attachment portion in the extension direction thereof, the first abutting arm and the second abutting arm being arranged offset in the extension direction thereof.

[0010] Further, the first abutting arm includes a first offset portion connected to the first extension arm and a first abutting portion extending from the first offset portion, the width of the first offset portion gradually decreasing in the extension direction thereof toward the first abutting portion, the center line of the first abutting portion being located between the center line of the first extension arm and the outer side edge of the first extension arm, and the second abutting arm includes a second offset portion connected to the second extension arm and a second abutting portion extending from the second offset portion, the width of the second offset portion gradually decreasing in the extension direction thereof toward the second abutting portion, the center line of the second abutting portion being located between the center line of the second extension arm and the outer side edge of the second extension arm, the first abutting portion and the second abutting portion being arranged offset in the extension direction thereof.

[0011] Further, the surface of the main body portion and the surface of the attachment portion are welded and attached, the extension lengths of the first extension arm and the second extension arm are equal, and the extension lengths of the first abutting arm and the second abutting arm are equal.

[0012] Further, a connecting portion extending from the side edge of the main body portion is integrally formed and connected to the side edge of the attachment portion, the main body portion and the attachment portion are attached by press forming, the extension lengths of the first extension arm and the second extension arm are equal, and the extension lengths of the first abutting arm and the second abutting arm are equal.

[0013] The utility model discloses still adopt following technical scheme: a kind of electric connector, to be electrically connected with a circuit board, including one insulating base and the multiple terminal modules received in insulating base, each terminal module includes one insulating block, two signal terminals fixed to insulating block and one ground shield shell covered in the outside of insulating block, two signal terminals are used to transmit a pair of differential signals, each signal terminal includes one main part, one contact part is extended from main part upward, main part is fixedly connected with one attachment, attachment is integrally or separately formed with main part, attachment is attached to main part along its thickness direction, first elastic arm and second elastic arm are respectively extended from the lower end of main part and the lower end of attachment, first elastic arm and second elastic arm are exposed in the bottom of insulating block, first elastic arm includes one first extension arm connected to main part and one first abutment arm reversely bent and extended from first extension arm, second elastic arm includes one second extension arm connected to attachment and one second abutment arm reversely bent and extended from second extension arm, first extension arm and second extension arm extend in opposite directions along a first direction perpendicular to up-down direction, first abutment arm and second abutment arm extend in opposite directions along the first direction, and first abutment arm and second abutment arm are partially side by side arranged along a second direction perpendicular to first direction and up-down direction, first abutment arm and second abutment arm are used to abut and electrically connect the same conductive path of circuit board.

[0014] Further, in each signal terminal, the two outer sides of main part and the two outer sides of attachment are arranged in alignment along its thickness direction, the connection between main part and first extension arm is provided with a closing part, the outer side of closing part is more protruding relative to the outer side of other parts of main part along second direction, the distance between two closing parts of two signal terminals along second direction is less than the distance between other parts of two signal terminals.

[0015] Further, the bottom of ground shield shell downwardly exceeds the bottom of insulating block and cooperatively encloses a shielding space with the bottom of insulating block, main part and attachment downwardly exceed the bottom of insulating block, first extension arm and second extension arm are located in shielding space, first abutment arm and second abutment arm are respectively provided with a first abutment part and a second abutment part exceeding the bottom of ground shield shell, the bottom of ground shield shell extends multiple grounding feet downwardly, and the multiple grounding feet are located at opposite two outer sides of first abutment arm and second abutment arm along second direction.

[0016] Further, first extension arm and second extension arm of each signal terminal along up-down direction are both spaced apart from the bottom of insulating block, and the distance between first extension arm and the bottom of insulating block along up-down direction and the distance between second extension arm and the bottom of insulating block along up-down direction are substantially equal.

[0017] Further, the minimum distance between first elastic arm of each signal terminal and ground shield shell along first direction is substantially equal to the minimum distance between second elastic arm and ground shield shell.

[0018] Further, in each terminal module, the minimum distance between the first elastic arm or the second elastic arm of one of the signal terminals and the ground shielding shell along the second direction is substantially equal to the minimum distance between the first elastic arm or the second elastic arm of the other signal terminal and the ground shielding shell.

[0019] Further, in each terminal module, the projection of one of the signal terminals along the up-down direction and the projection of the other signal terminal along the up-down direction are arranged to be axially symmetrical along the center line of the distance between the two signal terminals, and the two first abutting arms are located between the two second abutting arms or the two second abutting arms are located between the two first abutting arms.

[0020] Further, in each terminal module, the projection of one of the signal terminals along the up-down direction and the projection of the other signal terminal along the up-down direction are arranged to be 180-degree symmetrical about the midpoint of the distance between the two signal terminals, and the first abutting arms and the second abutting arms are alternately arranged along the second direction.

[0021] Compared with the prior art, the utility model has the advantages that: the signal terminal comprises a main body part and an attachment part which are integrally arranged or separately arranged, the attachment part is attached to the main body part, the thickness of the signal terminal at the attachment position is increased, the cross-sectional area of the signal terminal is increased, the impedance at the attachment position is improved, the overall impedance matching of the signal terminal is facilitated, the first elastic arm comprises a first extension arm which is bent and extended from the main body part and a first abutting arm which is bent and extended from the first extension arm in the opposite direction, the second elastic arm comprises a second extension arm which is extended from the attachment part in the direction away from the first extension arm and a second abutting arm which is bent and extended from the second extension arm towards the first abutting arm, the first elastic arm and the second elastic arm both have a longer force arm through twice bending and extending, the elastic performance of the first elastic arm and the second elastic arm is increased, the signal terminal and the circuit board are in good elastic contact, the first extension arm and the second extension arm are arranged in the direction away from each other, the first abutting arm and the second abutting arm are arranged in the direction close to each other, when the signal terminal is installed on the circuit board, the sliding force generated when the first elastic arm contacts the circuit board and the sliding force generated when the second elastic arm contacts the circuit board can be offset in the extension direction, the signal terminal and the circuit board are prevented from being in misaligned contact due to the excessive sliding distance, the abutting surface of the first abutting part and the abutting surface of the second abutting part are coplanar to abut on the circuit board and are electrically connected to the same conductive path, the signal terminal can be in communication with the same conductive path of the circuit board through the first elastic arm and the second elastic arm to establish two signal transmission paths, and the signal transmission rate of the signal terminal is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a partial view of the utility model electric connector;

[0023] Figure 2A partial bottom view of the electric connector of the utility model;

[0024] Figure 3 For Figure 2 An enlarged schematic view of the A area in the middle;

[0025] Figure 4 A perspective exploded view of the terminal module of the electric connector of the utility model;

[0026] Figure 5 A perspective view of the first embodiment of the two signal terminals of the utility model;

[0027] Figure 6 A rear view of the first embodiment of the two signal terminals of the utility model abutting against the circuit board;

[0028] Figure 7 A left view of the terminal module formed by the two signal terminals of the first embodiment of the utility model;

[0029] Figure 8 A perspective view of the second embodiment of the two signal terminals of the utility model;

[0030] Figure 9 For Figure 8 The left view;

[0031] Figure 10 For Figure 8 The bottom view;

[0032] Figure 11 A bottom view of the terminal module formed by the two signal terminals of the third embodiment of the utility model;

[0033] Figure 12 A bottom view of the terminal module formed by the signal terminals of the fourth embodiment of the utility model.

[0034] Explanation of the reference numerals of the specific embodiment:

[0035]

Specific Embodiment

[0036] In order to better understand the purpose, structure, features and effects of the utility model, the utility model will be further described in combination with the drawings and specific embodiments.

[0037] For example, Figures 1 to 12The utility model provides a signal terminal 3 and electric connector, electric connector includes an insulating base 1 and the multiple terminal module M that contains in the multiple containing groove 11 of insulating base 1 respectively, every terminal module M includes an insulating block 2 and the single or two signal terminals 3 fixed in insulating block 2, a ground shield shell 4 is covered in the outside of insulating block 2 to shield signal terminal 3, multiple terminal module M is arranged as multiple rows and multiple columns, and the outside of every row terminal module M is equipped with a ground lead piece 5 and is connected multiple ground shield shell 4, wherein every signal terminal 3 includes a main part 31 and with the main part 31 integral or separate setting an attachment 34, attachment 34 is attached to main part 31 along its thickness direction, from main part 31 extends a first elastic arm 33 and from attachment 34 extends a second elastic arm 35, first elastic arm 33 includes from main part 31 bending and extending a first extension arm 331 and from first extension arm 331 reversely bending and extending a first abutment arm 332, second elastic arm 35 includes from attachment 34 extends a second extension arm 351 in the direction away from first extension arm 331 and from second extension arm 351 extends a second abutment arm 352 towards first abutment arm 332, namely first extension arm 331 and second extension arm 351 extend in opposite directions, first abutment arm 332 and second abutment arm 352 extend in opposite directions, and first abutment portion 3322 on first abutment arm 332 and second abutment portion 3522 of second abutment arm 352 are coplanarly arranged to abut on the same conductive pad P of circuit board 6 to realize electrically connecting the same conductive path of circuit board 6. Wherein Figures 1 to 7 The signal terminal 3 of the first embodiment of the utility model and the terminal module and the electric connector formed by the same, Figures 8 to 10 The signal terminal of the second embodiment of the utility model, Figure 11 The terminal module formed by the signal terminal of the third embodiment of the utility model, Figure 12 The terminal module formed by the signal terminal of the fourth embodiment of the utility model, in the first, second and third embodiments, two signal terminals 3 and insulating blocks 22 are arranged in the ground shield shell 4 to form the terminal module M, and in the fourth embodiment, only one signal terminal 3 and insulating block 22 can be arranged in the ground shield shell 4 to form the terminal module M. The up-down direction, the first direction and the second direction are indicated by the coordinate axes in the drawings, wherein the up-down direction is represented by the Z-axis direction, the positive direction of the Z-axis is upward, the first direction is perpendicular to the up-down direction, the first direction is represented by the X-axis direction, the positive direction of the X-axis is forward, the second direction is perpendicular to the up-down direction and the first direction, and the second direction is represented by the Y-axis, the positive direction of the Y-axis is right. In the above-mentioned embodiments, the first direction is the front-back direction, the second direction is the left-right direction, and the thickness direction of the attachment 34 is parallel to the first direction.

[0038] As Figure 4 , Figure 5The diagram shows two signal terminals 3 according to the first embodiment of this utility model. A contact portion 32 extends from the upper end of the main body portion 31 of the signal terminal 3. The contact portion 32 is used for electrical connection with an external connector. A first elastic arm 33 extends from the lower end of the main body portion 31. The first elastic arm 33 includes a first extension arm 331 that bends forward from the lower end of the main body portion 31 and a first abutting arm 332 that bends backward from the first extension arm 331. The first elastic arm 33 is formed by two bends, so that the first elastic arm 33 undergoes one more reverse bend than the elastic arm in the prior art. As a result, the first elastic arm 33 has a longer lever arm and better elastic compression performance, which is beneficial to maintaining good elastic contact between the signal terminal 3 and the circuit board 6. The first extension arm 331 has a through groove S extending through its thickness direction. This groove S extends to the bend connection between the first extension arm 331 and the main body 31, and to the reverse bend connection between the first extension arm 331 and the first abutting arm 332. This alleviates stress concentration at the two bend connections and extends the service life of the first elastic arm 33. The first abutting arm 332 includes a first offset portion 3321 connected to the first extension arm 331 and a first abutting portion 3322 extending rearward from the first offset portion 3321. The width of the first offset portion 3321 gradually decreases along its extension direction toward the first abutting portion 3322 (i.e., from front to back). See [reference needed]. Figure 2 and Figure 6 The two outer edges of the first offset portion 3321 extend obliquely relative to the two outer edges of the first extension arm 331 and gradually approach each other along the second direction. The overall width of the first offset portion 3321 varies relatively uniformly to avoid stress concentration in the first abutting arm 332. The first offset portion 3321 causes the centerline of the first abutting portion 3322 to be offset relative to the centerline of the first extension arm 331 along the second direction. Figure 2 and Figure 3The center line of the first abutting portion 3322 along the second direction is between the center line of the first extension arm 331 and the outer side edge of the first extension arm 331, the width of the first abutting portion 3322 is equal to the minimum width of the first offset portion 3321, the first extension arm 331 is relatively at a high impedance point at high frequencies, and the first abutting arm 332 is relatively at a low impedance point, so the overall width of the first abutting arm 332 is reduced relative to the width of the first extension arm 331, which helps to improve the impedance of the signal terminal 3 at the first abutting arm 332, thereby reducing the impedance difference between the first abutting arm 332 and the first extension arm 331, so that the overall impedance of the signal terminal 3 is matched, and at the same time, the width of the first abutting portion 3322 is minimized, the width of the second abutting portion 3522 is also minimized, and the width of the same conductive pad P on the circuit board 6 matched with the first abutting portion 3322 and the second abutting portion 3522 can also be set smaller, thereby preventing the impedance at the contact between the first abutting portion 3322 and the second abutting portion 3522 and the conductive pad P from being too low, improving the minimum impedance of the entire electrical connection system when transmitting a 224 Gb / s signal, and helping the entire electrical connection system to achieve better characteristic impedance matching and reduce the attenuation of the 224 Gb / s signal. In this embodiment, the first abutting portion 3322 and the second abutting portion 3522 are the same conductive path connecting the circuit board 6 by abutting the same conductive pad P, and in other embodiments (not shown) the first abutting portion 3322 and the second abutting portion 3522 can also abut two conductive pads P, as long as two conductive pads P correspond to the same conductive path in the circuit board 6 to be connected to enable the first abutting portion 3322 and the second abutting portion 3522 to be electrically connected to the same conductive path of the circuit board 6.

[0039] As Figure 4 and Figure 5As shown, the attachment portion 34 is formed separately from the main body portion 31, and the rear surface of the main body portion 31 and the front surface of the attachment portion 34 are attached and fixed together by welding, so that the attachment portion 34 and the main body portion 31 abut against each other and are electrically conducted, and the thickness of the signal terminal 3 at the attachment position is greater than the thickness of other parts of the signal terminal 3, which is conducive to improving the impedance of the signal terminal 3 at the attachment position, reducing the impedance difference between the attachment position of the main body portion 31 and the attachment portion 34 and the first extension arm 331, and aligning the two outer sides of the main body portion 31 with the two outer sides of the attachment portion 34 along the thickness direction, so that the main body portion 31 and the attachment portion 34 are in surface-to-surface contact with the maximum contact area for electrical conduction; the second elastic arm 35 extending from the attachment portion 34 has a similar structure to the first elastic arm 33, and the second elastic arm 35 includes a second extension arm 351 extending (i.e., extending backward by bending) from the lower end of the attachment portion 34 in a direction away from the first extension arm 331 and a second abutting arm 352 extending (i.e., extending forward by bending) from the second extension arm 351 toward the first abutting arm 332, so that the second elastic arm 35 also has a longer lever arm and better elastic compression performance after two bending, and a through slot S is also provided on the second extension arm 351 along the thickness direction, which extends to the bending connection between the second extension arm 351 and the attachment portion 34 and the reverse bending connection between the second extension arm 351 and the second abutting arm 352 to relieve stress concentration at the two bending connections, and the two through slots S make the first extension arm 331 and the second extension arm 351 both have a double-arm structure to form a double-conductive transmission path, which is conducive to reducing impedance and matching the overall impedance of the signal terminal 3, the second abutting arm 352 includes a second offset portion 3521 connected to the second extension arm 351 and a second abutting portion 3522 extending forward from the second offset portion 3521, the width of the second offset portion 3521 gradually decreases along the extension direction (i.e., from back to front) toward the second abutting arm 352, the two outer edges of the second offset portion 3521 extend obliquely relative to the two outer edges of the second extension arm 351 and gradually approach along the second direction, which relieves the stress concentration of the second abutting arm 352, the second offset portion 3521 makes the center line of the second abutting portion 3522 located between the center line of the second extension arm 351 and one outer edge of the second extension arm 351, and the width of the second abutting portion 3522 is also equal to the minimum width of the second offset portion 3521, which is conducive to reducing the impedance of the signal terminal 3 at the second abutting arm 352 at high frequencies and matching the overall impedance of the signal terminal 3.

[0040] As Figures 5 to 7As shown, the first and second extension arms 331 and 351 extend away from each other, the first and second abutting arms 332 and 352 extend towards each other, specifically, the first and second extension arms 331 and 351 extend away from each other in the first direction, which is conducive to the first and second elastic arms 33 and 35 forming a longer force arm structure, the first and second abutting arms 332 and 352 extend towards each other in the first direction, so when the signal terminal 3 is installed to the circuit board 6, the sliding force generated when the first elastic arm 33 contacts the circuit board 6 and the sliding force generated when the second elastic arm 35 contacts the circuit board 6 are opposite in the first direction, so that the two forces cancel each other out, preventing the signal terminal 3 from being miscontacted with the conductive pad P of the circuit board 6, ensuring that the first and second abutting portions 3322 and 3522 can be accurately contacted with the corresponding conductive pad P, and referring to Figure 2 and Figure 3 The first and second abutting arms 332 and 352 are staggered along the first direction, avoiding mutual impact and deformation when the first and second abutting arms 332 and 352 slide in their extension direction, ensuring the stability of the structure of the first and second abutting arms 332 and 352, and the projection parts of the first and second abutting arms 332 and 352 along the second direction overlap, specifically, as shown, Figure 3 The first abutting arm 332 can extend beyond the attachment portion 34, and the second abutting arm 352 can extend beyond the main body portion 31, so that the first and second abutting arms 332 and 352 also have a longer force arm, referring to Figure 6 The first and second abutting portions 3322 and 3522 are located at the same height along the up-down direction, the abutting surfaces of the first and second abutting portions 3322 and 3522 are coplanarly arranged along the plane where the dashed line L1 is located, and the first and second abutting portions 3322 and 3522 form double contact points to abut the same conductive pad P of the circuit board 6, so that the signal terminal 3 can simultaneously establish two signal transmission paths with the circuit board 6 through the first and second elastic arms 33 and 35, improving the signal transmission rate of the signal terminal 3, wherein the extension lengths of the first and second extension arms 331 and 351 are equal, and the extension lengths of the first and second abutting arms 332 and 351 are equal, so that the transmission path lengths of the two signal conductive paths are equal, preventing periodic resonance caused by unequal transmission of conductive paths. Here, equal can be understood as approximately equal, that is, due to manufacturing process tolerances, the tolerance range is ±0.2mm.

[0041] The distance between the first abutting portion 3322 and the second abutting portion 3522 in the first direction is less than the extension length of the first extension arm 331 and the second extension arm 351, so that the first abutting portion 3322 and the second abutting portion 3522 occupy less space in the first direction, and the distance between the first abutting portion 3322 and the second abutting portion 3522 in the second direction is less than the width of the first extension arm 331 and the second extension arm 351, and the two outer sides of the first abutting portion 3322 and the second abutting portion 3522 far away from each other are arranged more inward than the two outer sides of any of the first extension arm 331 and the second extension arm 351, so that the first abutting portion 3322 and the second abutting portion 3522 occupy less space in the second direction, facilitating the miniaturization of the signal terminal 3 and the corresponding conductive pad P of the circuit board 6, and facilitating the arrangement of more signal terminals 3 in a limited space.

[0042] As shown in Figure 4 and Figure 7 In each terminal module M, two signal terminals 3 constitute a differential signal pair for transmitting high-frequency differential signals, and the insulating block 2 partially covers the outer sides of the two signal terminals 3 to fix the two signal terminals 3. Specifically, the contact portion 32 of the signal terminal 3 is exposed at the upper end of the insulating block 2, and the first elastic arm 33 and the second elastic arm 35 are exposed at the lower end of the insulating block 2, so as to be electrically connected with the external connector and the circuit board 6 respectively, and the main body portion 31 and the attachment portion 34 are molded and covered in the insulating block 2, so that the main body portion 31 and the attachment portion 34 are further tightly joined, which is conducive to the good surface abutment of the surface of the main body portion 31 and the surface of the attachment portion 34, as shown in Figure 4 and Figure 6 The connection between the main body portion 31 and the first extension arm 331 is provided with a converging portion 311, and the outer side of the converging portion 311 is more protruding in the second direction relative to the outer side of other parts of the main body portion 31, and the two converging portions 311 of the two signal terminals 3 protrude towards each other in the second direction, so that the distance between the two converging portions 311 of the two signal terminals 3 is less than the distance between other parts of the two signal terminals 3, so as to form a tight coupling of the two signal terminals 3 at the converging portions 311, and reduce the crosstalk between the two signal terminals 3 in the terminal module M and other signal terminals 3 in other terminal modules M, and the outer side of the attachment portion 34 is also aligned with the outer side of the converging portion 311, as shown in Figure 2 and Figure 3When viewed from above, in each terminal module M, the projection of one signal terminal 3 along the up-down direction and the projection of the other signal terminal 3 along the up-down direction are arranged in axial symmetry along the center line L2 of the two signal terminal spacing, in this embodiment, the two first abutting arms 332 are located between the two second abutting arms 352, so that the signal internal wiring of the two conductive pads P on the circuit board 6 can also be close to each other to form tight coupling, thereby improving signal transmission quality, in other embodiments (not shown), the two second abutting arms 352 can also be located between the two first abutting arms 332.

[0043] As shown in Figure 1 , Figure 4 and Figure 7 , the cylindrical ground shielding shell 4 surrounds the four sides of the insulating block 2, thereby providing shielding around the four sides of the two signal terminals 3, reducing crosstalk interference between the two signal terminals 3 and other signal terminals 3 outside, as shown in Figure 7 , the profile of the insulating block 2 and the signal terminal 3 is shown by a dashed line, the bottom of the ground shielding shell 4 exceeds the bottom of the insulating block 2 and together with the bottom of the insulating block 2 surrounds a shielding space 42, the main body part 31 and the attachment part 34 exceed the bottom of the insulating block 22, the first elastic arm 33 and the second elastic arm 35 are located in the shielding space 42, the shielding space 42 is sufficient for the first elastic arm 33 and the second elastic arm 35 to be fully elastically deformed to be in good electrical connection with the conductive pads P on the circuit board 6, and wherein the first extension arm 331 and the second extension arm 351 are not exceeded by the bottom of the ground shielding shell 4 and are well shielded, the first abutting part 3322 and the second abutting part 3522 exceed the bottom of the ground shielding shell 4, to ensure that the first abutting part 3322 and the second abutting part 3522 are not limited by the bottom of the ground shielding shell 4 in contact with the conductive pads, the bottom of the ground shielding shell 4 further extends a plurality of grounding feet 41, the plurality of grounding feet 41 are arranged along the opposite two outer sides of the two signal terminals 3, see Figure 2 , the left and right side walls of the ground shielding shell 4 each extend two grounding feet 41, so that the plurality of grounding feet 41 are staggered with the first abutting arm 332 and the second abutting arm 352 in the first direction, preventing the first abutting arm 332 and the second abutting arm 352 from being mistakenly touched by the grounding feet 41 when sliding in the first direction during installation, avoiding short circuit between the signal terminal 3 and the ground shielding shell 4, and a plurality of grounding feet 41 are arranged between every two signal terminals 3 in the second direction, reducing signal crosstalk between adjacent terminal modules M. As shown in Figure 3 , the overall structure of the first elastic arm 33 and the second elastic arm 35 of each signal terminal 3 is 180 degrees rotationally symmetrical about the center of the signal terminal 3, so that the length and width of the first elastic arm 33 and the second elastic arm 35 each extend are equal, and as shown in Figure 7As shown, in the vertical direction, the first extension arm 331 and the second extension arm 352 of each signal terminal 3 are spaced apart from the bottom of the insulating block 22. The distance D1 between the first extension arm 331 and the insulating block 2 in the vertical direction is approximately equal to the distance D2 between the second extension arm 352 and the insulating block 2. In the first direction, the minimum distance between the first elastic arm 33 and the grounding shield 4 of each signal terminal 3 is approximately equal to the minimum distance between the second elastic arm 35 and the grounding shield 4. Specifically, the distance D3 between the reverse bend connection of the first extension arm 331 and the first abutment arm 332 and one side of the grounding shield 4 in the first direction is approximately equal to the distance between the reverse bend connection of the second extension arm 351 and the second abutment arm 352 and the grounding shield 4. The distance D4 between the other two sides ensures that the dielectric distribution around the first elastic arm 33 and the second elastic arm 35 is the same. That is, the distances from the first elastic arm 33 and the second elastic arm 35 to the surrounding plastic medium (insulating block 2) of each signal terminal 3 are approximately equal (D1=D2), and the distances from the first elastic arm 33 and the second elastic arm 35 to the surrounding conductive medium (grounding shield 4) are approximately equal (D3=D4). This is beneficial because the impedance experienced by the signal transmission path established by the first elastic arm 33 and the signal transmission path established by the second elastic arm 35 is the same, and the electromagnetic field distribution around the first elastic arm 33 and the second elastic arm 35 is uniform, which is beneficial to signal transmission and prevents the two signal transmission paths from being inconsistent.

[0044] like Figure 3 As shown, the first elastic arm 33 and the second elastic arm 35 of each signal terminal are rotationally symmetrical. Along the second direction, the distance between the first elastic arm 33 and the second elastic arm 35 of each signal terminal 3 and the same side of the grounding shield 4 is approximately equal. Furthermore, in each terminal module M, along the second direction, the minimum distance between the first elastic arm 33 or the second elastic arm 35 of one signal terminal 3 and the grounding shield 4 is approximately equal to the minimum distance between the first elastic arm 33 or the second elastic arm 35 of the other signal terminal 3 and the grounding shield 4. Specifically, along the second direction, the first elastic arm 33 of one signal terminal 3 and the grounding shield 4 are approximately equal to the minimum distance between the first elastic arm 33 or the second elastic arm 35 of the other signal terminal 3 and the grounding shield 4. The distance D5 between the two sides of the shielding shell 4 is approximately equal to the distance D6 between the first elastic arm 33 of the other signal terminal 3 and the other side of the grounding shielding shell 4. Similarly, the distance between the second elastic arm 35 of one signal terminal 3 and one side of the grounding shielding shell 4 is also approximately equal to the distance between the second elastic arm 35 of the other signal terminal and the other side of the grounding shielding shell 4. This ensures that the distances between the two signal terminals 3 transmitting differential signals and the grounding shielding shell 4 are approximately equal, guaranteeing the synchronization of the two signal terminals 3 when transmitting a pair of differential signals, avoiding time delay issues, and thus ensuring signal integrity. The "approximately equal" mentioned above refers to the tolerances inherent in manufacturing processes, with an allowable tolerance range of ±0.2mm. Within this tolerance range, all distances can be considered approximately equal.

[0045] As Figures 8 to 10 The two signal terminals 3 of the second embodiment are different from the two signal terminals 3 of the first embodiment in that the attachment portion 34 of each signal terminal 3 is integrally extended from the main body portion 31, the outer side edge of the main body portion 31 integrally extends a connecting portion 312 connected to the side edge of the attachment portion 34, the main body portion 31 and the attachment portion 34 are folded and attached along the first direction by stamping, the outer side insulation block 2 is wrapped around the main body portion 31 and the attachment portion 34 to prevent the connecting portion 312 and the attachment portion 34 from rebounding (not shown), and the side edge of the attachment portion 34 close to the other signal terminal 3 is arranged in alignment with the side edge of the main body portion 31 close to the other signal terminal 3 to maintain the maximum contact area between the attachment portion 34 and the main body portion 31. The first elastic arm 33 and the second elastic arm 35 of the signal terminal 3 of the second embodiment also include the first extension arm 331 and the first abutting arm 332, and the second extension arm 351 and the second abutting arm 352, so that the first elastic arm 33 and the second elastic arm 35 have good elasticity after being bent twice, the first extension arm 331 and the second extension arm 351 extend away from each other along the first direction, the first abutting arm 332 and the second abutting arm 352 extend close to each other along the first direction, and the first elastic arm 33 and the second elastic arm 35 cancel each other's two sliding forces in the first direction when installed on the circuit board 6, preventing the signal terminal 3 from being misaligned with the conductive pad P of the circuit board 6. The first abutting arm 332 also includes the first offset portion 3321 and the first abutting portion 3322, and the second abutting arm 352 also includes the second offset portion 3521 and the second abutting portion 3522, so that the two outer sides of the first abutting portion 3322 and the second abutting portion 3522 are arranged more inwardly relative to the two outer sides of the first extension arm 331 and the second extension arm 352, and the abutting surfaces of the first abutting portion 3322 and the second abutting portion 3522 are coplanar to contact the same conductive pad P, so that each signal terminal 3 forms two conductive transmission paths for signal transmission between the first elastic arm 33 and the second elastic arm 35 and the circuit board 6.

[0046] As Figure 11 The two signal terminals 3 of the third embodiment of the utility model are the same as the structure of the signal terminal 3 of the first embodiment, the two signal terminals 3 of the first embodiment are arranged in axial symmetry, and the two signal terminals 3 of the third embodiment are arranged in rotational symmetry. Specifically, in the terminal module M, the projection of one signal terminal 3 along the up-down direction is symmetric with the projection of the other signal terminal 3 along the up-down direction by rotating 180 degrees around a midpoint O between the two signal terminals, so that the first abutting arm 332 and the second abutting arm 352 are arranged alternately along the second direction.

[0047] As Figure 12The signal terminal 3 and the terminal module M formed by the signal terminal 3 are shown in the fourth embodiment of the utility model, the structure of the signal terminal 3 is substantially same with the structure of the signal terminal 3 in the first embodiment, only one signal terminal 3 and insulating block 2 are arranged in the ground shield shell 4 in the terminal module M in the fourth embodiment, the signal terminal 3 is used to transmit single-end signal and is centrally arranged in the ground shield shell 4, the distance between the first elastic arm 33 of the signal terminal 3 and one side of the ground shield shell 4 along the first direction is equal to the distance between the second elastic arm 35 and the other side of the ground shield shell 4, the distance between the first elastic arm 33 of the signal terminal 3 and one side of the ground shield shell 4 along the second direction is also equal to the distance between the second elastic arm 35 and the other side of the ground shield shell 4, so the consistency of the two signal transmission paths of the first elastic arm 33 and the second elastic arm 35 is ensured, and the signal integrity is ensured.

[0048] In summary, the signal terminal 3 and the electric connector have the following beneficial effects:

[0049] 1. The main body part 31 of the signal terminal 3 is attached with the attachment part 34 at one end, which increases the thickness of the signal terminal 3 at the attachment position, thereby increasing the cross-sectional area of the signal terminal 3 and improving the impedance at the attachment position, which is beneficial to the overall impedance matching of the signal terminal 3. The first elastic arm 33 extends from the main body part 31, and the second elastic arm 35 extends from the attachment part 34. The first elastic arm 33 includes a first extension arm 331 extending from the main body part 31 and a first abutting arm 332 extending from the first extension arm 331 in the opposite direction. The second elastic arm 35 includes a second extension arm 351 extending from the attachment part 34 in a direction away from the first extension arm 331 and a second abutting arm 352 extending from the second extension arm 351 towards the first abutting arm 332. The first elastic arm 33 and the second elastic arm 35 both have longer levers through two bending extensions, which increases the elastic properties of the first elastic arm 33 and the second elastic arm 35, and is beneficial to the good elastic contact between the signal terminal 3 and the circuit board 6. The first extension arm 331 and the second extension arm 351 extend away from each other, and the first abutting arm 332 and the second abutting arm 352 extend towards each other. When the signal terminal 3 is installed on the circuit board 6, the sliding force generated when the first elastic arm 33 contacts the circuit board 6 and the sliding force generated when the second elastic arm 35 contacts the circuit board 6 are offset in the extension direction of the first abutting arm 332 and the second abutting arm 352, preventing the signal terminal 3 from being misaligned with the circuit board 6 due to excessive sliding distance. The first abutting arm 332 and the second abutting arm 352 are partially coplanar to abut the circuit board 6 to connect the same conductive path, so that the signal terminal 3 can simultaneously communicate with the circuit board 6 through the first elastic arm 33 and the second elastic arm 35 and establish two signal transmission paths, thereby improving the transmission rate of the signal terminal 3.

[0050] 2. The first extension arm 331 is provided with a through slot S extending through the thickness direction thereof, the through slot S extending to the bending connection between the first extension arm 331 and the main body 31 and the bending connection between the first extension arm 331 and the first abutting arm 332, relieving the stress concentration at the two bending connections and prolonging the service life of the first elastic arm 33.

[0051] 3. The width of the first offset portion 3321 gradually decreases from one end thereof in the extension direction of the first abutting portion 3322, so that the width uniformly changes to improve the stress concentration, the center line of the first abutting portion 3322 being located between the center line of the first extension arm 331 and the outer side edge of the first extension arm 331, the width of the first abutting portion 3322 being equal to the minimum width of the first offset portion 3321, the first extension arm 331 being at a high impedance point and the first abutting arm 332 being at a low impedance point on a high frequency, so that the overall width of the first abutting arm 332 is reduced to increase the impedance of the signal terminal 3 at the first abutting arm 332, thereby reducing the impedance difference between the first abutting arm 332 and the first extension arm 331, matching the overall impedance of the signal terminal 3, and at the same time, the width of the first abutting portion 3322 is minimized, the width of the second abutting portion 3522 is also minimized, and the width of the same conductive pad P on the circuit board 6 cooperating with the two abutting portions can also be set to be smaller, thereby preventing the impedance at the conductive pad from being too low, increasing the minimum impedance of the entire electrical connection system when transmitting a 224 Gb / s signal, and helping the entire electrical connection system to achieve better characteristic impedance matching and reduce the attenuation of the 224 Gb / s signal.

[0052] 4. The extension lengths of the first extension arm 331 and the second extension arm 351 are equal, and the extension lengths of the first abutting arm 332 and the second abutting arm 352 are equal, so that the transmission path lengths of the two signal conductive paths are equal, preventing periodic resonance caused by unequal transmission of the conductive paths.

[0053] 5. The plurality of grounding feet 41 are arranged on the opposite outer sides of the two signal terminals 3, so that the plurality of grounding feet 41 are staggered with the first abutting arm 332 and the second abutting arm 352 in the first direction, preventing the first abutting arm 332 and the second abutting arm 352 from being mistakenly touched by the grounding feet 41 during installation, and avoiding short circuit between the signal terminal 3 and the grounding feet 41.

[0054] 6. The first extension arm 331 and the second extension arm 352 of each signal terminal 3 are spaced apart from the bottom of the insulating block 22 in the up-down direction, the distance D1 of the first extension arm 331 from the insulating block 2 is substantially equal to the distance D2 of the second extension arm 352 from the insulating block 2 in the up-down direction, the distance D3 between the first extension arm 331 and the side of the ground shielding shell 4 at the reverse bending connection of the first extension arm 331 and the first abutting arm 332 in the first direction is substantially equal to the distance D4 between the second extension arm 351 and the other side of the ground shielding shell 4 at the reverse bending connection of the second extension arm 351 and the second abutting arm 352, so that the medium distribution around the first elastic arm 33 and the second elastic arm 35 is the same, the distance of the first elastic arm 33 and the second elastic arm 35 to the plastic medium (the insulating block 2) around the same is substantially equal (D1=D2), the distance of the first elastic arm 33 and the second elastic arm 35 to the conductive medium (the ground shielding shell 4) around the same is substantially equal (D3=D4), which is conducive to the impedance of the signal transmission paths established by the first elastic arm 33 and the second elastic arm 35 being the same, and the electromagnetic field distribution around the first elastic arm 33 and the second elastic arm 35 being uniform, which is conducive to signal transmission and prevents the generation of time delay problems caused by the inconsistency of the two signal transmission paths.

[0055] 7. In each terminal module M, the distance D5 between the first elastic arm 33 of one of the signal terminals 3 and one side of the ground shielding shell 4 in the second direction is substantially equal to the distance D6 between the first elastic arm 33 of the other signal terminal 3 and the other side of the ground shielding shell 4, and the distance between the second elastic arm 35 of one of the signal terminals 3 and one side of the ground shielding shell 4 is also substantially equal to the distance between the second elastic arm 35 of the other signal terminal and the other side of the ground shielding shell 4, so that the distance between the two signal terminals 3 transmitting differential signals and the ground shielding shell 4 is equal, thereby ensuring the synchronization of the two signal terminals 3 when transmitting a pair of differential signals and avoiding the generation of time delay problems, thereby ensuring the integrity of signal transmission.

[0056] The above detailed description is only for the preferred embodiments of the present application, and does not limit the patent scope of the present application, so that any equivalent technical changes made according to the content of the present application and drawings are included in the patent scope of the present application.

Claims

1. A signal terminal for electrically connecting with a circuit board, characterized by comprising: The application relates to a contactor, which comprises a main body, a contact part extending from one end of the main body, a first elastic arm extending from the other end of the main body, a first extension arm extending from the main body, a first abutting arm extending from the first extension arm, an attachment part fixedly connected to the main body near the first elastic arm, the attachment part being integrally formed with the main body or separately formed and arranged on the main body, the attachment part being attached to the main body along the thickness direction of the attachment part, a second elastic arm extending from one end of the attachment part, a second extension arm extending from the attachment part in a direction away from the first extension arm, and a second abutting arm extending from the second extension arm towards the first abutting arm, the first abutting arm being provided with a first abutting part, and the second abutting arm being provided with a second abutting part, the first abutting part and the second abutting part being coplanar and electrically connected to the same conductive path of a circuit board. Two through grooves are formed along the thickness directions of the first extension arm and the second extension arm, one of the two through grooves extending to the bending connection position of the first extension arm and the main body in a first direction, and the other of the two through grooves extending to the bending connection position of the second extension arm and the attachment part in the first direction.

2. The signal terminal of claim 1, wherein The first abutting part is formed at the end of the first abutting arm, and the second abutting part is formed at the end of the second abutting arm, the first abutting part and the second abutting part abutting the same conductive pad of the circuit board.

3. The signal terminal of claim 1, wherein The first abutting arm extends beyond one side of the main body along the extension direction of the first abutting arm, the second abutting arm extends beyond one side of the attachment part along the extension direction of the second abutting arm, and the first abutting arm and the second abutting arm are arranged in a staggered manner along the extension directions of the first abutting arm and the second abutting arm.

4. The signal terminal of claim 1, wherein: The first abutting arm comprises a first offset part connected to the first extension arm and a first abutting part extending from the first offset part, the width of the first offset part gradually decreases along the extension direction of the first abutting arm, the center line of the first abutting part is located between the center line of the first extension arm and the outer side edge of the first extension arm, the second abutting arm comprises a second offset part connected to the second extension arm and a second abutting part extending from the second offset part, the width of the second offset part gradually decreases along the extension direction of the second abutting arm, the center line of the second abutting part is located between the center line of the second extension arm and the outer side edge of the second extension arm, and the first abutting part and the second abutting part are arranged in a staggered manner along the extension directions of the first abutting part and the second abutting part.

5. The signal terminal of claim 1, wherein The surface of the main body and the surface of the attachment part are welded and attached, the extension lengths of the first extension arm and the second extension arm are equal, and the extension lengths of the first abutting arm and the second abutting arm are equal.

6. The signal terminal of claim 1, wherein A connecting part extending from the side edge of the main body is integrally connected to the side edge of the attachment part, the main body and the attachment part are attached by stamping forming, the extension lengths of the first extension arm and the second extension arm are equal, and the extension lengths of the first abutting arm and the second abutting arm are equal.

7. The signal terminal of claim 1, wherein ​ 8. An electrical connector for electrically connecting to a circuit board, characterized in that, The terminal module includes an insulating base and a plurality of terminal modules received in the insulating base. Each terminal module includes an insulating block, two signal terminals fixed to the insulating block, and a ground shielding shell wrapped outside the insulating block. The two signal terminals are used to transmit a pair of differential signals. Each signal terminal includes a main body portion, a contact portion upwardly extending from the main body portion, an attachment portion fixedly connected to the main body portion, the attachment portion being integrally or separately formed with the main body portion, the attachment portion being attached to the main body portion along a thickness direction thereof, a first elastic arm and a second elastic arm respectively extending from a lower end of the main body portion and a lower end of the attachment portion, the first elastic arm and the second elastic arm being exposed at a bottom of the insulating block, the first elastic arm including a first extension arm connected to the main body portion and a first abutting arm reversely bent and extended from the first extension arm, the second elastic arm including a second extension arm connected to the attachment portion and a second abutting arm reversely bent and extended from the second extension arm, the first extension arm and the second extension arm extending away from each other along a first direction perpendicular to an up-down direction, the first abutting arm and the second abutting arm extending toward each other along the first direction, and the first abutting arm and the second abutting arm being partially arranged side by side along a second direction perpendicular to the first direction and the up-down direction, the first abutting arm and the second abutting arm being used to abut and electrically connect to a same conductive path of a circuit board.

9. The electrical connector of claim 8, wherein In each signal terminal, two outer side edges of the main body portion and two outer side edges of the attachment portion are arranged in alignment along the thickness direction thereof, the main body portion is provided with a closing portion at a position where the main body portion is connected to the first extension arm, the outer side edges of the closing portion are more protruded relative to the outer side edges of other portions of the main body portion along the second direction, and a distance between the two closing portions of the two signal terminals along the second direction is smaller than a distance between other portions of the two signal terminals.

10. The electrical connector of claim 8, wherein The bottom of the ground shielding shell downwardly extends beyond the bottom of the insulating block and cooperatively encloses a shielding space with the bottom of the insulating block, the main body portion and the attachment portion downwardly extend beyond the bottom of the insulating block, the first extension arm and the second extension arm are located in the shielding space, the first abutting arm and the second abutting arm are respectively provided with a first abutting portion and a second abutting portion extending beyond the bottom of the ground shielding shell, and the bottom of the ground shielding shell downwardly extends a plurality of grounding feet, the plurality of grounding feet are located at opposite two outer sides of the first abutting arm and the second abutting arm along the second direction.

11. The electrical connector of claim 10, wherein: The first extension arm and the second extension arm of each signal terminal are spaced apart from the bottom of the insulating block along the up-down direction, and a distance between the first extension arm and the bottom of the insulating block along the up-down direction is substantially equal to a distance between the second extension arm and the bottom of the insulating block along the up-down direction.

12. The electrical connector of claim 10, wherein: The minimum distance between the first elastic arm of each signal terminal and the ground shielding shell along the first direction is substantially equal to the minimum distance between the second elastic arm of each signal terminal and the ground shielding shell along the first direction.

13. The electrical connector of claim 10, wherein: In each terminal module, the minimum distance between the first elastic arm or the second elastic arm of one signal terminal and the ground shielding shell along the second direction is substantially equal to the minimum distance between the first elastic arm or the second elastic arm of the other signal terminal and the ground shielding shell.

14. The electrical connector of claim 8, wherein In each terminal module, the projection of one of the signal terminals in the up-down direction is arranged to be axially symmetrical to the projection of the other signal terminal in the up-down direction along the center line of the two signal terminal spacing, and the two first abutting arms are located between the two second abutting arms or the two second abutting arms are located between the two first abutting arms.

15. The electrical connector of claim 8, wherein In each terminal module, the projection of one of the signal terminals in the up-down direction is arranged to be 180 degrees symmetrical to the projection of the other signal terminal in the up-down direction along the midpoint of the two signal terminal spacing, and the first abutting arms and the second abutting arms are arranged alternately in the second direction.

Images