Electric connector

Abstract

The utility model discloses an electric connector, which comprises a shell, at least one metal sheet and two terminal strips, the shell is provided with a slot, the two terminal strips are arranged at the front side and the rear side of the slot, each terminal strip comprises a plurality of signal terminals arranged along the left-right direction, each signal terminal comprises a signal contact part, the signal contact part extends downwards to form a signal elastic part, and the signal elastic part is arranged on the shell. The signal elastic part extends downwards to form a flat-plate-shaped signal holding part, the signal holding part extends downwards to form a signal tail part, the metal sheet is located between the two terminal strips, and the signal holding part extends towards the metal sheet in an inclined mode from bottom to top. The distance between the position, close to the signal elastic part, of the signal holding part and the metal sheet is smaller than the distance between the position, close to the signal tail part, of the signal holding part and the metal sheet, impedance sensed by a signal on the signal holding part is gradually changed in the direction from the signal contact part to the signal tail part instead of changing suddenly, and reflection of the signal is reduced. And the signal integrity of the electric connector is optimized.

Description

[Technical Field]

[0001] This utility model relates to an electrical connector, and more particularly to an electrical connector that improves signal integrity. [Background Technology]

[0002] An existing electrical connector includes a housing, two metal plates, and two terminal blocks. The housing includes a slot for inserting a mating element. The two terminal blocks are respectively disposed on both sides of the slot in a front-to-back direction. Each terminal block includes multiple signal terminals and multiple ground terminals arranged in a left-to-right direction. Each signal terminal includes a signal contact portion exposed in the slot. The signal contact portion extends downward to form a signal elastic portion located within the housing. The signal elastic portion bends downward to form a signal holding portion located within the housing. The signal holding portion is connected downward to a signal tail portion. The signal tail portion extends out of the housing and is used for soldering to a circuit board. The two metal plates are disposed between the two terminal blocks, and the metal plates and the signal holding portions are arranged parallel to each other. Each metal plate shields a corresponding terminal block, improving the crosstalk problem between the two terminal blocks, thereby improving the signal integrity (SI) of the electrical connector.

[0003] However, when the metal plate and the signal holding part are arranged in parallel, the distance between any position of the metal plate and the signal holding part is equal. Since the impedance is proportional to the distance between the metal plate and the signal holding part, the impedance of the signal holding part will not change significantly. However, due to the differences in the distribution of the medium and conductors around the signal tail and the signal elastic part, there will inevitably be an impedance difference between the signal tail and the signal elastic part. If the impedance of the signal holding part is not adjusted according to this impedance difference, the impedance felt by the signal transmitted by the signal terminal on the signal holding part will change abruptly from the signal contact part to the signal tail, resulting in greater signal reflection and a deterioration of the SI of the electrical connector. The SI performance of the electrical connector needs further improvement.

[0004] Therefore, it is necessary to design an electrical connector to solve the above-mentioned technical problems. [Utility Model Content]

[0005] The purpose of this invention is to provide an electrical connector that optimizes impedance by extending the signal holding portion at an angle from bottom to top toward the metal plate.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An electrical connector, characterized in that it comprises: a housing including a slot into which a mating element is inserted downward; two terminal blocks housed in the housing, the two terminal blocks being disposed on opposite sides of the slot in a front-rear direction, each terminal block including a plurality of signal terminals and a plurality of ground terminals arranged in a left-right direction; each signal terminal including a signal contact portion exposed in the slot, the signal contact portion extending downward to form a signal elastic portion located within the housing, the signal elastic portion bending downward to form a signal holding portion located within the housing, the signal holding portion being flat, the signal holding portion being connected downward to a signal tail portion, the signal tail portion extending out of the housing; at least one loss member disposed between the two terminal blocks, the loss member including a base portion extending from the base portion toward the ground terminals to form a plurality of protrusions, the protrusions portions being electrically coupled to the ground terminals; at least one metal sheet disposed between the terminal blocks and the base portion; the signal holding portion extending obliquely upward toward the metal sheet from bottom to top, and in the front-rear direction, the signal holding portion and the metal sheet having a first distance and a second distance, the first distance being smaller than the second distance, and the position of the first distance being closer to the signal elastic portion than the position of the second distance.

[0008] Furthermore, the metal sheet includes a body portion extending vertically in the vertical direction, and in the front-back direction, the body portion overlaps with the signal holding portion. Multiple isolation portions extend obliquely upward from the upper end of the body portion toward the slot to form a plurality of isolation portions. In the front-back direction, the isolation portions overlap with the signal elastic portions, and the isolation portions and the signal elastic portions are approximately parallel.

[0009] Furthermore, it includes two plastic blocks located on the front and rear sides of the slot, each plastic block being fixed to the signal holding part of each terminal block. In the front-rear direction, there is a third distance between the isolation part and the signal elastic part, and the third distance is smaller than the first distance.

[0010] Furthermore, it includes two plastic blocks located on the front and rear sides of the slot, each plastic block being fixed to the signal holding part of each terminal block, and each signal receiving slot having a signal terminal pair consisting of two signal terminals. Within the same signal terminal pair, the distance between the opposite sides of the two signal elastic parts is less than the distance between the opposite sides of the two signal holding parts.

[0011] Furthermore, the housing is also provided with multiple signal receiving slots and multiple grounding receiving slots located on the front and rear sides of the slot. The signal terminals are received in the signal receiving slots, and the grounding terminals are received in the grounding receiving slots. There is a partition between the adjacent grounding receiving slots and signal receiving slots. Each signal receiving slot has a first sidewall and a second sidewall arranged opposite to each other. The partition is recessed from the first sidewall to form a first clearance groove, and the partition is recessed from the second sidewall to form a second clearance groove. The metal sheet includes multiple isolation portions. In the front-rear direction, the isolation portions overlap with the signal elastic portions. The isolation portions are located in the first clearance groove and the second clearance groove. The isolation portions extend beyond the signal elastic portions in the left-right direction.

[0012] Furthermore, a back plug is provided between the two terminal blocks. The back plug includes multiple support parts corresponding to multiple signal receiving slots. The support parts are located on the side of the metal sheet close to the slot in the front-back direction. A metal sheet is provided between each terminal block and the back plug. The first clearance slot includes a first support wall located on the side of the metal sheet away from the slot in the front-back direction. The second clearance slot includes a second support wall located on the side of the metal sheet away from the slot in the front-back direction. The support parts, the first support wall and the second support wall support the metal sheet on both sides in the front-back direction.

[0013] Furthermore, it includes two plastic blocks located on the front and rear sides of the slot, each plastic block being fixed to the signal holding part of each terminal block, a metal sheet located between the support part and the plastic blocks, the plastic blocks and the support part supporting the metal sheet on both sides in the front-rear direction, the support part being located in the first clearance groove and the second clearance groove, the top of the support part being higher than the top of the plastic block, and the first support wall and the second support wall being at least partially higher than the top of the plastic block.

[0014] Furthermore, each grounding terminal includes a grounding contact portion exposed in the slot, the grounding contact portion extending downward to form a grounding elastic portion located in the grounding receiving groove, the grounding elastic portion bending downward to form a grounding retaining portion, an extension portion provided at the upper end of the protrusion portion, the protrusion portion being electrically coupled to the grounding retaining portion, the extension portion being located between the slot and the grounding elastic portion, and a gap being provided between the extension portion and the grounding elastic portion.

[0015] Furthermore, the electrical connector also includes two plastic blocks located on the front and rear sides of the slot, each plastic block being fixed to a corresponding terminal block, with the top of the protrusion higher than the top of the plastic block.

[0016] Furthermore, the grounding terminal includes a grounding tail extending out of the housing, the grounding tail including a grounding soldering portion for soldering to a circuit board, the metal sheet including a plurality of solder feet for soldering to the circuit board, the solder feet being aligned front to back with the grounding soldering portion, and in the left-right direction, the size of the solder feet being larger than the size of the grounding soldering portion.

[0017] Furthermore, it includes two plastic blocks located on the front and rear sides of the slot. Each plastic block is fixed to a corresponding terminal block. The opposing surfaces of the two plastic blocks are respectively provided with multiple grooves. The grounding terminal is exposed in the groove. Each groove has an inclined guide surface on both the left and right sides. The distance between the two guide surfaces in the same groove gradually decreases towards the grounding terminal. The protrusion is located in the groove and is electrically coupled to the grounding terminal. The left and right sides of the protrusion are provided with inclined surfaces corresponding to the guide surfaces.

[0018] Furthermore, it includes two plastic blocks located on the front and rear sides of the slot, each plastic block being fixed to a corresponding terminal block, each plastic block including multiple reinforcing parts, the reinforcing parts abutting against a metal sheet, a rear plug being provided between the two terminal blocks, and a metal sheet being provided between each plastic block and the rear plug.

[0019] To achieve the above objectives, the present invention also adopts the following other technical solution:

[0020] An electrical connector, characterized in that it comprises: a housing including a slot into which a mating element is inserted downward; two terminal blocks housed in the housing, the two terminal blocks being disposed on opposite sides of the slot in a front-rear direction, each terminal block including a plurality of signal terminals and a plurality of ground terminals arranged in a left-right direction; each signal terminal including a signal contact portion exposed in the slot, the signal contact portion extending downward to form a signal elastic portion located within the housing, the signal elastic portion bending downward to form a signal holding portion located within the housing, the signal holding portion being flat, the signal holding portion being connected downward to a signal tail portion, the signal tail portion extending out of the housing, the signal holding portion including a first end connected to the signal elastic portion and a connection to the signal... The second end of the tail section; at least one lossy component, disposed between two terminal blocks, the lossy component including a base, extending from the base toward the ground terminal to form a plurality of protrusions, the protrusions being electrically coupled to the ground terminal; two plastic blocks, respectively located on the front and rear sides of the slot, each plastic block being fixed to the signal holding part of each terminal block; at least one metal sheet, disposed between the terminal block and the base; the signal holding part extending obliquely toward the metal sheet from bottom to top, in the front-rear direction, a first distance between the first end and the metal sheet, the first distance being between 0.25mm and 0.40mm, and a second distance between the second end and the metal sheet, the second distance being between 0.52mm and 0.70mm.

[0021] Furthermore, the metal sheet includes a body portion extending vertically in the vertical direction, and in the front-back direction, the body portion overlaps with the signal holding portion. Multiple isolation portions extend obliquely upward from the upper end of the body portion toward the slot to form a plurality of isolation portions. In the front-back direction, the isolation portions overlap with the signal elastic portions, and the isolation portions and the signal elastic portions are approximately parallel.

[0022] Furthermore, it includes two plastic blocks located on the front and rear sides of the slot, each plastic block being fixed to the signal holding part of each terminal block. In the front-rear direction, there is a third distance between the isolation part and the signal elastic part, and the third distance is smaller than the first distance.

[0023] Furthermore, it includes two plastic blocks located on the front and rear sides of the slot, each plastic block being fixed to the signal holding part of each terminal block, and each signal receiving slot having a signal terminal pair consisting of two signal terminals. Within the same signal terminal pair, the distance between the opposite sides of the two signal elastic parts is less than the distance between the opposite sides of the two signal holding parts.

[0024] Furthermore, the housing is also provided with multiple signal receiving slots and multiple grounding receiving slots located on the front and rear sides of the slot. The signal terminals are received in the signal receiving slots, and the grounding terminals are received in the grounding receiving slots. There is a partition between the adjacent grounding receiving slots and signal receiving slots. Each signal receiving slot has a first sidewall and a second sidewall arranged opposite to each other. The partition is recessed from the first sidewall to form a first clearance groove, and the partition is recessed from the second sidewall to form a second clearance groove. The metal sheet includes multiple isolation portions. In the front-rear direction, the isolation portions overlap with the signal elastic portions. The isolation portions are located in the first clearance groove and the second clearance groove. The isolation portions extend beyond the signal elastic portions in the left-right direction.

[0025] Furthermore, each grounding terminal includes a grounding contact portion exposed in the slot, the grounding contact portion extending downward to form a grounding elastic portion located in the grounding receiving groove, the grounding elastic portion bending downward to form a grounding retaining portion, an extension portion provided at the upper end of the protrusion portion, the protrusion portion being electrically coupled to the grounding retaining portion, the extension portion being located between the slot and the grounding elastic portion, and a gap being provided between the extension portion and the grounding elastic portion.

[0026] Furthermore, the electrical connector also includes two plastic blocks located on the front and rear sides of the slot, each plastic block being fixed to a corresponding terminal block, with the top of the protrusion higher than the top of the plastic block.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The signal holding portion extends obliquely upwards towards the metal sheet. In the front-to-back direction, there are a first distance and a second distance between the signal holding portion and the metal sheet. The first distance is smaller than the second distance, and the position of the first distance is closer to the signal elastic portion than the position of the second distance. When a signal is transmitted on the signal terminal, due to the difference in the distribution of the medium and surrounding conductors between the signal tail and the signal elastic portion, there will inevitably be an impedance difference between them. Compared to setting the first distance to be equal to the second distance, this application sets the first distance to be smaller than the second distance, making the signal holding portion a transition section to stabilize signal transmission. That is, the impedance experienced by the signal on the signal holding portion changes gradually along the direction from the signal contact portion to the signal tail, rather than abruptly. This gradually changing impedance reduces signal reflection, thereby optimizing return loss. Furthermore, because signal reflection is reduced, crosstalk generated in the electrical connector due to large signal reflection is also reduced. Therefore, this application optimizes both return loss and crosstalk, ultimately significantly improving the signal integrity of the electrical connector and facilitating signal transmission. Furthermore, if the signal holding part extends vertically in the vertical direction while keeping the positions of the signal contact and signal tail unchanged, the total length of the signal holding part and the signal elastic part is relatively long, resulting in a longer transmission path for the signal terminal. In this application, the signal holding part extends obliquely towards the metal sheet from bottom to top. With the positions of the signal contact and signal tail unchanged, the total length of the signal holding part and the signal elastic part is relatively short, resulting in a shorter transmission path for the signal terminal, improving the signal transmission performance of the signal terminal, and thus optimizing the SI performance of the electrical connector. [Attached Image Description]

[0029] Figure 1 This is a perspective view of the electrical connector, mating element, and circuit board of this utility model;

[0030] Figure 2 for Figure 1 Exploded 3D view of CEC connectors;

[0031] Figure 3 for Figure 1 Front view of the CEC connector;

[0032] Figure 4 for Figure 1 Cross-sectional view of the CEC connector along line AA;

[0033] Figure 5 for Figure 1 A perspective sectional view of some components of the CEC connector along line AA;

[0034] Figure 6 for Figure 3 Cross-sectional view of the CEC connector along line BB;

[0035] Figure 7 for Figure 3 Cross-sectional view of the C-line connector;

[0036] Figure 8 for Figure 3 Enlarged view of area D of the CEC connector with one grounding terminal removed;

[0037] Figure 9 for Figure 3 Cross-sectional view of the CEC connector along line EE;

[0038] Figure 10 for Figure 3 Cross-sectional view of the CEC connector along the FF line;

[0039] Figure 11 for Figure 2 A front view of some terminals of the CEC connector.

[0040] Explanation of reference numerals in the accompanying drawings for the specific implementation methods:

[0041]

[0042]

Detailed Implementation Methods

[0043] To facilitate a better understanding of the purpose, structure, features, and effects of this utility model, the present utility model will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0044] For ease of understanding, this utility model defines the X-axis extension direction as the left-right direction, with the positive X-axis direction being to the right; defines the Y-axis extension direction as the front-back direction, with the positive Y-axis direction being forward; and defines the Z-axis as the up-down direction, with the positive Z-axis direction being upward.

[0045] Please see Figure 1 , 2 The electrical connector 100 of this utility model is used to connect a mating element in the vertical direction. The electrical connector 100 includes a housing 1, two plastic blocks 2, two terminal blocks R, two loss components 5, a back plug 6, and two metal sheets 7.

[0046] Please see Figure 2 , 4 5. The housing 1 is provided with a slot 11 for inserting the docking element downwards, and a plurality of signal receiving slots 12 and a plurality of grounding receiving slots 13 located on the front and rear sides of the slot 11.

[0047] Please see Figure 4 , 5A partition 14 is provided between the adjacent grounding receiving slot 13 and signal receiving slot 12. Each signal receiving slot 12 has a first side wall 121 and a second side wall 122 arranged opposite to each other. The partition 14 is recessed from the first side wall 121 to form a first clearance slot 141, which includes a first support wall 1411. The partition 14 is recessed from the second side wall 122 to form a second clearance slot 142, which includes a second support wall 1421.

[0048] Please see Figure 2 , 6 7. Two plastic blocks 2 are distributed on both sides of the slot 11 along the front-back direction. Each plastic block 2 is fixed together with a terminal block R by injection molding. The opposing surfaces of the two plastic blocks 2 are respectively provided with a plurality of grooves 21, and each groove 21 has an inclined guide surface 211 on both the left and right sides; each plastic block 2 is provided with a plurality of protrusions 22, and the protrusions 22 include two hooks 221 spaced apart from left to right; the opposing surfaces of the two plastic blocks 2 are respectively provided with a plurality of reinforcing parts 23.

[0049] Please see Figure 2 , 4 5. Two terminal blocks R are housed in the housing 1, and the two terminal blocks R are respectively arranged on both sides of the slot 11 in the front-back direction. Each terminal block R includes multiple signal terminals 3 and multiple ground terminals 4 arranged in the left-right direction. The signal terminals 3 are housed in the signal receiving slot 12. Each signal receiving slot 12 is provided with a signal terminal pair S composed of two signal terminals 3. The ground terminals 4 are housed in the ground receiving slot 13. Each ground receiving slot 13 is provided with a ground terminal 4.

[0050] Please see Figure 2 , 8 10. Each signal terminal 3 includes a signal contact portion 31 exposed in the slot 11. When the docking element is inserted into the slot 11, the signal contact portion 31 contacts the docking element. The signal contact portion 31 extends downward to form a signal elastic portion 32 located in the signal receiving groove 12. The signal elastic portion 32 bends downward to form a signal holding portion 33. The plastic block 2 and the signal holding portion 33 are fixed together by injection molding. A signal tail portion 34 extends downward from the signal holding portion 33 to form a signal protrusion from the outer casing 1. The signal tail portion 34 includes a signal solder portion 341 soldered to a circuit board.

[0051] Please see Figure 2 , 11Within the same signal terminal pair S, the distance between the opposite sides of the two signal elastic parts 32 is less than the distance between the opposite sides of the two signal holding parts 33. Since the plastic block 2 and the signal holding parts 33 are fixed together by injection molding, the dielectric constant near the signal holding parts 33 is relatively large. Since the impedance is inversely proportional to the dielectric constant, the impedance of the signal holding parts 33 is relatively small. Furthermore, the impedance is directly proportional to the distance between the opposite sides of the signal terminals 3. Within the same signal terminal pair S, the distance between the opposite sides of the two signal elastic parts 32 is less than the distance between the opposite sides of the two signal holding parts 33, thus reducing the impedance of the signal elastic parts 32 and achieving impedance matching between the signal elastic parts 32 and the signal holding parts 33.

[0052] Please see Figure 2 , 5 10. The signal holding part 33 includes a first end 331 connected to the signal elastic part 32 and a second end 332 connected to the signal tail part 34. In the front-back direction, the signal elastic part 32 is closer to the slot 11 than the signal tail part 34. Both the signal elastic part 32 and the signal holding part 33 are flat and extend obliquely from bottom to top toward the slot 11. The angles of inclination of the signal elastic part 32 and the signal holding part 33 are different.

[0053] Please see Figure 8 , 9 11. Each grounding terminal 4 includes a grounding contact portion 41 exposed in the slot 11. When the docking element is inserted into the slot 11, the grounding contact portion 41 contacts the docking element. The grounding contact portion 41 extends downward to form a grounding elastic portion 42 located in the grounding receiving groove 13. The grounding elastic portion 42 bends downward to form a grounding holding portion 43. A grounding tail portion 44 extends downward from the grounding holding portion 43 to form a grounding tail portion 44 extending out of the outer casing 1. The grounding tail portion 44 includes a grounding solder portion 441 soldered to the circuit board.

[0054] Please see Figure 2 , 6 The plastic block 2 and the grounding holding part 43 are fixed together by injection molding. The grounding holding part 43 is exposed in the groove 21. The distance between the two guiding surfaces 211 in the same groove 21 gradually decreases in the direction closer to the grounding terminal 4.

[0055] Please see Figure 9In the front-to-back direction, the grounding elastic part 42 is closer to the slot 11 than the grounding tail part 44. Both the grounding elastic part 42 and the grounding retaining part 43 are flat and extend obliquely from bottom to top toward the slot 11. The grounding elastic part 42 and the grounding retaining part 43 are oblique at different angles. With the positions of the grounding contact 41 and the grounding tail 44 remaining unchanged, if the grounding holding part 43 extends vertically in the up-down direction, the total length of the grounding holding part 43 and the grounding elastic part 42 is relatively long, resulting in a longer grounding path for the grounding terminal 4. In this application, in the front-back direction, both the grounding holding part 43 and the grounding elastic part 42 are flat and extend obliquely from bottom to top toward the slot 11. Neither the grounding holding part 43 nor the grounding elastic part 42 has any bending portion. At this time, the lengths of the grounding holding part 43 and the grounding elastic part 42 are at their shortest lengths. Furthermore, with the positions of the grounding contact 41 and the grounding tail 44 remaining unchanged, the total length of the grounding holding part 43 and the grounding elastic part 42 is also relatively short, resulting in a shorter grounding path for the grounding terminal 4 and making the shape of the grounding holding part 43 compatible with that of the signal holding part 33.

[0056] Please see Figure 2 , 9 The loss-generating component 5 is made of conductive plastic; however, in other embodiments, it may also be made of absorbing material or the like. The loss-generating component 5 is fixed between the two terminal blocks R.

[0057] Please see Figure 2 , 6 9. Each loss component 5 includes a base 51, and a plurality of protrusions 52 extend from the base 51 toward the grounding terminal 4 in a front-back direction. The protrusions 52 are located in the groove 21 and electrically coupled to the grounding holding part 43. An extension 53 is provided at the upper end of the protrusion 52. The extension 53 is located between the slot 11 and the grounding elastic part 42, and there is a gap between the extension 53 and the grounding elastic part 42.

[0058] Please see Figure 2 , 6 The protrusion 52 has inclined surfaces 521 on its left and right sides that correspond to the guide surface 211.

[0059] Please see Figure 9 The top of the protrusion 52 is higher than the top of the plastic block 2. Compared with the top of the protrusion 52 being lower than the top of the plastic block 2, the protrusion 52 has a larger coupling portion with the grounding terminal 4 in the vertical direction, resulting in better shielding and thus reducing crosstalk between the two terminal blocks R.

[0060] Please see Figure 2 , 7The rear plug 6 is fixed between the two end sub-rows R, and the loss-inducing component 5 and the rear plug 6 are injection molded together. The rear plug 6 includes multiple fixing grooves 61, and each of the left and right side walls of the fixing groove 61 is provided with a fixing block 611. The protruding post 22 is located in the fixing groove 61, and the fixing block 611 cooperates with the hook 221 to restrict the separation of the plastic block 2 from the rear plug 6. The rear plug 6 also includes multiple support parts 62 corresponding to multiple signal receiving grooves 12.

[0061] Please see Figure 2 , 8 9. The metal sheet 7 is located between each plastic block 2 and the rear plug 6. The metal sheet 7 includes a body portion 71 extending vertically in the vertical direction. In the front-back direction, the body portion 71 overlaps with the signal holding portion 33. The body portion 71 is provided with a plurality of slots 711 corresponding to the protrusion 52 and a plurality of fixing holes 712 corresponding to the fixing slot 61. The protrusion 52 passes through the slots 711 and forms an electrical coupling with the grounding holding portion 43. A plurality of isolation portions 72 are formed by extending obliquely upward from the upper end of the body portion 71 toward the slot 11. A plurality of solder feet 73 are formed by extending downward from the lower end of the body portion 71 to be soldered to the circuit board.

[0062] Please see Figure 4 , 9 In the front-to-back direction, the isolation part 72 overlaps with the signal elastic part 32, and the metal sheet 7 can also shield the signal elastic part 32, which can improve the crosstalk problem between the signal elastic parts 32 of the two terminal blocks R. The shielding effect of the metal sheet 7 is better, and the isolation part 72 and the signal elastic part 32 are roughly parallel.

[0063] Please see Figure 4 The isolation section 72 is located within the first clearance groove 141 and the second clearance groove 142, and the isolation section 72 extends beyond the signal elastic section 32 in the left and right directions.

[0064] Please see Figure 2 , 9 Due to its material properties, the loss component 5 absorbs both noise between the signal terminals 3 and the signal transmitted by the signal terminals 3. As a result, the insertion loss of the electrical connector 100 will increase. The metal sheet 7 can not only shield the crosstalk between the two terminal blocks R, but also isolate the loss component 5 and the signal terminals 3, thereby reducing the absorption of the signal transmitted by the signal terminals 3 by the loss component 5, thus optimizing the insertion loss of the electrical connector 100 and improving the SI performance of the electrical connector 100.

[0065] Please see Figure 9The top of the isolation section 72 is higher than the top of the loss member 5, which not only makes the area of ​​the isolation section 72 shielding the signal elastic section 32 larger, but also makes the area of ​​the metal sheet 7 isolating the loss member 5 and the signal terminal 3 larger. This allows the loss member 5 to more effectively reduce the absorption of the signal transmitted by the signal terminal 3, optimize the insertion loss of the electrical connector 100, and improve the SI performance of the electrical connector 100.

[0066] Please see Figure 10 In the front-to-back direction, the distance between the first end 331 and the main body 71 is the first distance D1, which is the distance between the connection point of the signal holding part 33 and the signal elastic part 32 and the main body 71. The distance between the second end 332 and the main body 71 is the second distance D2, which is the distance between the connection point of the signal holding part 33 and the signal tail part 34 and the main body 71. Since the signal holding part 33 is flat and extends obliquely from bottom to top toward the slot 11, and the main body 71 extends vertically in the up-down direction, the first distance D1 is less than the second distance D2. The first distance D1 is between 0.25mm and 0.40mm, and the second distance D2 is between 0.52mm and 0.70mm. The position of the signal terminal 3 remains fixed, and the distance between the metal plate 7 and the signal terminal 3 is controlled by changing the position of the metal plate 7.

[0067] Please see Figure 10 In the front-to-back direction, there is a third distance D3 between the isolation part 72 and the signal elastic part 32. The third distance D3 is the distance between any position of the isolation part 72 and the signal elastic part 32 in the front-to-back direction, and the third distance D3 is less than the first distance D1. Since the plastic block 2 and the signal holding part 33 are fixed together by injection molding, the dielectric constant near the signal holding part 33 is relatively large. Since the impedance is inversely proportional to the dielectric constant, the impedance of the signal holding part 33 is relatively small. The impedance is also directly proportional to the magnitude of the first distance D1 and the third distance D3. The third distance D3 is less than the first distance D1, which reduces the impedance near the signal elastic part 32, thereby achieving impedance matching between the signal elastic part 32 and the signal holding part 33.

[0068] Please see Figure 1 , 8Solder foot 73 is aligned front-to-back with ground solder portion 441, and in the left-to-right direction, the size of solder foot 73 is larger than the size of ground solder portion 441. Both solder foot 73 and ground solder portion 441 are connected to the ground plane on the circuit board, optimizing the grounding path of ground terminal 4 and making it easier for noise to be transmitted. Furthermore, the alignment of solder foot 73 with ground solder portion 441, compared to a staggered arrangement, results in a closer distance between solder foot 73 and ground solder portion 441, which optimizes the circuit design of the ground plane on the circuit board, allowing noise to flow back to the ground plane quickly. In addition, the larger size of solder foot 73 in the left-to-right direction increases the shielding area between the two terminal blocks R, reducing crosstalk between the two terminal blocks R.

[0069] Please see Figure 2 , 7 The protruding post 22 is located inside the fixing hole 712, which can fix the metal sheet 7 between the plastic block 2 and the rear plug 6, so that the metal sheet 7, the plastic block 2 and the rear plug 6 can be stably fixed together.

[0070] Please see Figure 2 , 7 9. The reinforcing part 23 abuts against the metal sheet 7. Since the surface of the plastic block 2 may not be a flat surface, the metal sheet 7 may be unstable between the rear plug 6 and the plastic block 2. The plastic block 2 includes a reinforcing part 23 that abuts against the metal sheet 7, so that the metal sheet 7 is more stable when placed between the rear plug 6 and the plastic block 2.

[0071] Please see Figure 4 , 5 10. Support part 62 is located on the side of metal sheet 7 closer to slot 11 in the front-rear direction. First support wall 1411 is located on the side of metal sheet 7 away from slot 11 in the front-rear direction. Second support wall 1421 is located on the side of metal sheet 7 away from slot 11 in the front-rear direction. Support part 62, first support wall 1411 and second support wall 1421 support metal sheet 7 on both sides in the front-rear direction, respectively. This prevents metal sheet 7 from deforming and entering slot 11 or contacting signal terminal 3, thus ensuring that metal sheet 7 is stably fixed between plastic block 2 and back plug 6.

[0072] Please see Figure 4 , 510. The metal sheet 7 is located between the plastic block 2 and the support part 62 of the rear plug 6. The plastic block 2 and the support part 62 support the metal sheet 7 on both sides in the front-rear direction. The support part 62 is located in the first relief groove 141 and the second relief groove 142. The top of the support part 62 is higher than the top of the plastic block 2. The first support wall 1411 and the second support wall 1421 are located above the plastic block 2. The dielectric constant of the part of the signal terminal 3 that is injection molded with the plastic block 2 is relatively large, and the impedance is inversely proportional to the dielectric constant. Therefore, the impedance of the part of the signal terminal 3 that is injection molded with the plastic block 2 is relatively small. The support part 62 is located in the first relief groove 141 and the second relief groove 142. The top of the support part 62 is higher than the bottom of the slot 11, which increases the dielectric constant of the part of the signal terminal 3 that is not injection molded with the plastic block 2. This reduces the impedance of the signal elastic part 32, thereby achieving impedance matching of the signal terminal 3. Furthermore, the top of the support part 62 is higher than the top of the plastic block 2. The first support wall 1411 and the second support wall 1421 are located above the plastic block 2. The support part 62, the first support wall 1411 and the second support wall 1421 can also support the metal sheet 7 located above the plastic block 2, making the metal sheet 7 more stable.

[0073] In summary, the electrical connector of this utility model has the following beneficial effects:

[0074] (1) The signal holding part 33 extends obliquely from bottom to top toward the metal sheet 7. In the horizontal direction, the distance between the first end 331 and the main body part 71 is the first distance D1, and the distance between the second end 332 and the metal sheet 7 is the second distance D2. The first distance D1 is less than the second distance D2. When a signal is transmitted on signal terminal 3, due to the difference in the distribution of the medium and surrounding conductors around signal tail 34 and signal elastic part 32, there will inevitably be an impedance difference between signal tail 34 and signal elastic part 32. Compared to setting the first distance D1 to be equal to the second distance D2, this application sets the first distance D1 to be less than the second distance D2, so that the signal holding part 33 acts as a transition section to stabilize signal transmission. That is to say, the impedance felt by the signal on the signal holding part 33 changes gradually along the direction from signal contact part 31 to signal tail 34, rather than abruptly. This gradually changing impedance reduces signal reflection, thereby optimizing return loss. In addition, since signal reflection is reduced, crosstalk generated in electrical connector 100 due to large signal reflection will also be reduced due to the reduction of signal reflection. Therefore, this application can optimize crosstalk on the basis of optimizing return loss, and ultimately greatly improve the signal integrity of electrical connector 100, which is beneficial to signal transmission.

[0075] (2) Both the signal elastic part 32 and the signal holding part 33 are flat and extend obliquely from bottom to top toward the slot 11. The angles of inclination of the signal elastic part 32 and the signal holding part 33 are different. If the signal holding part 33 extends vertically in the vertical direction while the positions of the signal contact part 31 and the signal tail part 34 remain unchanged, the total length of the signal holding part 33 and the signal elastic part 32 will be longer, resulting in a longer transmission path for the signal terminal 3. In this application, both the signal elastic part 32 and the signal holding part 33 are flat and extend obliquely from bottom to top toward the slot 11. Neither the signal holding part 33 nor the signal elastic part 32 has a bent portion. The lengths of the signal holding part 33 and the signal elastic part 32 are the shortest lengths. Furthermore, when the positions of the signal contact part 31 and the signal tail part 34 remain unchanged, the total length of the signal holding part 33 and the signal elastic part 32 is also shorter, resulting in a shorter transmission path for the signal terminal 3. This improves the signal transmission performance of the signal terminal 3 and optimizes the SI performance of the electrical connector 100.

[0076] (3) In the front-back direction, the distance between the first end 331 and the main body 71 is the first distance D1, and the distance between the second end 332 and the metal sheet 7 is the second distance D2. Since the signal holding part 33 is flat and extends obliquely from bottom to top toward the slot 11, and the main body 71 extends vertically in the up-down direction, the first distance D1 is less than the second distance D2. The first distance D1 is between 0.25mm and 0.40mm, and the second distance D2 is between 0.52mm and 0.70mm. Since the plastic block 2 and the signal holding part 33 are fixed together by injection molding, the dielectric constant near the signal holding part 33 is relatively large. Since the impedance is inversely proportional to the dielectric constant, the impedance of the signal holding part 33 is relatively small. The impedance of the signal holding part 33 is also directly proportional to the first distance D1 and the second distance D2. Therefore, if the first distance D1 is less than or equal to 0.25 mm and the second distance D2 is less than or equal to 0.52 mm, the impedance of the signal holding part 33 will be even smaller, causing an impedance mismatch between the signal holding part 33 and other positions of the signal terminal 3. If the first distance D1 is greater than or equal to 0.25 mm and the second distance D2 is greater than or equal to 0.52 mm, the impedance of the signal holding part 33 will be even smaller. If the distance is equal to 0.40mm and the second distance D2 is greater than or equal to 0.70mm, the impedance of the signal holding part 33 will be relatively large, causing the impedance of the signal holding part 33 to be mismatched with other positions of the signal terminal 3. Furthermore, if the distance between the metal sheet 7 and the signal terminal 3 is too large, the shielding effect of the metal sheet 7 may be poor. Also, the isolation part 72 of the metal sheet 7 may enter the slot 11. When the docking element is inserted into the slot 11, the isolation part 72 may scrape against the docking element, causing damage to the docking element. Alternatively, when the docking element is inserted, the isolation part 72 may be bent and deformed, affecting the shielding effect of the metal sheet 7.

[0077] (4) The isolation part 72 is approximately parallel to the signal elastic part 32. In the front-back direction, if the distance between the bottom of the isolation part 72 and the signal elastic part 32 is less than the distance between the top of the isolation part 72 and the signal elastic part 32, the top of the isolation part 72 may enter the slot 11 due to being too close to it. When the docking element is inserted into the slot 11, the isolation part 72 may scrape against the docking element, causing damage to the docking element, or the insertion of the docking element may cause the isolation part 72 to bend and deform. If the distance between the bottom of the isolation part 72 and the signal elastic part 32 is greater than the distance between the top of the isolation part 72 and the signal elastic part 32, the top of the isolation part 72 may come into contact with the signal elastic part 32 due to being too close to it, causing a short circuit in the signal terminal 3. In this application, the isolation part 72 is approximately parallel to the signal elastic part 32, thereby avoiding the top of the isolation part 72 from being too close to the slot 11 or too close to the signal elastic part 32.

[0078] (5) The isolation portion 72 is located within the first clearance groove 141 and the second clearance groove 142, and the isolation portion 72 extends beyond the signal elastic portion 32 in the left and right directions. Compared with the isolation portion 72 not being located within the first clearance groove 141 and the second clearance groove 142, the isolation portion 72 being located within the first clearance groove 141 and the second clearance groove 142 in this application allows the size of the isolation portion 72 in the left and right directions to be larger, and the isolation portion 72 extends beyond the signal elastic portion 32 in the left and right directions, resulting in a larger shielding area of ​​the metal sheet 7 for the signal elastic portion 32, thereby more effectively improving the crosstalk problem between the signal elastic portions 32 of the two terminal blocks R and optimizing the SI performance of the electrical connector 100.

[0079] (6) Multiple grooves 21 are recessed on the opposing surfaces of the two plastic blocks 2. Each groove 21 has an inclined guide surface 211 on both the left and right sides. The protrusion 52 has a slope 521 on both the left and right sides corresponding to the guide surface 211. The guide surface 211 and the slope 521 cooperate to make it easier for the protrusion 52 to pass through the groove 21 and be electrically coupled to the ground terminal 4. Furthermore, due to the material characteristics of the loss component 5, the loss component 5 absorbs the signal transmitted by the signal terminal 3 while absorbing the noise between the signal terminals 3. Therefore, the insertion loss of the electrical connector 100 will increase, resulting in a deterioration of the SI performance of the electrical connector 100. In this application, due to the setting of the slope 521, the volume of the loss component 5 on both the left and right sides of the protrusion 52 is reduced, thereby reducing the impact of the loss component 5 on the signal terminal 3 and improving the SI performance of the electrical connector 100.

[0080] (7) The loss member 5 includes a base 51, and a plurality of protrusions 52 are formed extending from the base 51 toward the grounding terminal 4 in the front-back direction. The protrusions 52 are located in the groove 21 and electrically coupled to the grounding holding part 43. An extension 53 is provided at the upper end of the protrusion 52. The extension 53 is located between the slot 11 and the grounding elastic part 42, and there is a gap between the extension 53 and the grounding elastic part 42. The loss component 5 is electrically coupled to the ground holding part 43 to form a grounding loop, which optimizes the shielding effect and reduces crosstalk. There is a gap between the extension part 53 and the ground elastic part 42. The extension part 53 increases the dielectric constant at the ground elastic part 42, thereby increasing the capacitive coupling at the ground elastic part 42. The magnitude of crosstalk is related to the difference between capacitive coupling and inductive coupling. Therefore, the increase in capacitive coupling offsets more inductive coupling, achieving the effect of optimizing crosstalk and improving the SI performance of the electrical connector 100. In addition, the loss component 5 can absorb noise between the signal terminals 3. The setting of the extension part 53 makes the area corresponding to the loss component 5 and the ground terminal 4 larger, and the effect of absorbing noise between the signal terminals 3 is better, thereby improving the SI performance of the electrical connector 100.

[0081] The above detailed description is only a description of the preferred embodiment of this utility model and is not intended to limit the patent scope of this utility model. Therefore, all equivalent technical changes made using the content of this invention's specification and illustrations are included within the patent scope of this invention.

Claims

1. An electrical connector, characterized by, The application relates to a connector, comprising: a housing including a slot for downward insertion of a mating element; two terminal arrays accommodated in the housing, the two terminal arrays are respectively arranged on both sides of the slot along a front-rear direction, each terminal array includes a plurality of signal terminals and a plurality of ground terminals arranged along a left-right direction; each signal terminal includes a signal contact portion exposed to the slot, the signal contact portion extends downward to form a signal elastic portion located in the housing, the signal elastic portion extends downward to form a signal holding portion located in the housing, the signal holding portion is flat, the signal holding portion is connected to a signal tail portion downward, and the signal tail portion extends out of the housing; at least one loss member arranged between the two terminal arrays, the loss member includes a base portion, a plurality of protruding portions are formed from the base portion towards the ground terminals, and the protruding portions are electrically coupled with the ground terminals; at least one metal sheet arranged between the terminal array and the base portion; the signal holding portion extends upwardly from the bottom towards the metal sheet, in the front-rear direction, the signal holding portion and the metal sheet have a first distance and a second distance, the first distance is smaller than the second distance, and the position of the first distance is closer to the signal elastic portion than the position of the second distance.

2. The electrical connector of claim 1, wherein: The metal sheet includes a body portion vertically extending in the up-down direction, in the front-rear direction, the body portion overlaps with the signal holding portion, a plurality of isolation portions are formed from the upper end of the body portion upwardly towards the slot, in the front-rear direction, the isolation portions overlap with the signal elastic portion, and the isolation portions are substantially parallel to the signal elastic portion.

3. The electrical connector of claim 1, wherein: Two plastic blocks are arranged on both sides of the slot, each plastic block is fixed with the signal holding portion of each terminal array, in the front-rear direction, the isolation portions and the signal elastic portions have a third distance, and the third distance is smaller than the first distance.

4. The electrical connector of claim 1, wherein: Two plastic blocks are arranged on both sides of the slot, each plastic block is fixed with the signal holding portion of each terminal array, each signal accommodating groove is provided with a signal terminal pair composed of two signal terminals, and the distance between the opposite sides of the two signal elastic portions in the same signal terminal pair is smaller than the distance between the opposite sides of the two signal holding portions.

5. The electrical connector of claim 1, wherein: The housing is further provided with a plurality of signal accommodating grooves and a plurality of ground accommodating grooves arranged on both sides of the slot, the signal terminals are accommodated in the signal accommodating grooves, the ground terminals are accommodated in the ground accommodating grooves, a fence is arranged between the left-right adjacent ground accommodating grooves and signal accommodating grooves, each signal accommodating groove has a first side wall and a second side wall arranged oppositely in the left-right direction, the fence is recessed from the first side wall to form a first accommodation groove, the fence is recessed from the second side wall to form a second accommodation groove, the metal sheet includes a plurality of isolation portions, in the front-rear direction, the isolation portions overlap with the signal elastic portions, the isolation portions are located in the first accommodation groove and the second accommodation groove, and the isolation portions exceed the signal elastic portions in the left-right direction.

6. The electrical connector of claim 5, wherein: A rear plug is arranged between the two terminal rows, and the rear plug includes a plurality of support portions corresponding to the plurality of signal receiving grooves, the support portions being located on a side of the metal sheet close to the insertion slot in the front-rear direction. A metal sheet is arranged between each terminal row and the rear plug. The first clearance slot includes a first support wall located on a side of the metal sheet away from the insertion slot in the front-rear direction. The second clearance slot includes a second support wall located on a side of the metal sheet away from the insertion slot in the front-rear direction. The support portions, the first support wall, and the second support wall support the metal sheet on both sides in the front-rear direction.

7. The electrical connector of claim 6, wherein: The two plastic blocks are arranged on both sides of the insertion slot in the front-rear direction. Each plastic block is fixed to the signal holding portion of each terminal row. The metal sheet is located between the support portions and the plastic blocks. The plastic blocks and the support portions support the metal sheet on both sides in the front-rear direction. The support portions are located in the first clearance slot and the second clearance slot. The top of the support portions is higher than the top of the plastic blocks. The first support wall and the second support wall are at least partially higher than the top of the plastic blocks.

8. The electrical connector of claim 1, wherein: Each ground terminal includes a ground contact portion exposed to the insertion slot. The ground contact portion extends downward to form a ground elastic portion located in the ground receiving groove. The ground elastic portion is bent downward to extend to form a ground holding portion. The upper end of the protruding portion is provided with an extension portion. The protruding portion is electrically coupled to the ground holding portion. The extension portion is located between the insertion slot and the ground elastic portion. There is a gap between the extension portion and the ground elastic portion.

9. The electrical connector of claim 1, wherein: The electrical connector further includes two plastic blocks arranged on both sides of the insertion slot in the front-rear direction. Each plastic block is fixed to a corresponding terminal row. The top of the protruding portion is higher than the top of the plastic blocks.

10. The electrical connector of claim 1, wherein: The ground terminal includes a ground tail portion extending out of the housing. The ground tail portion includes a ground soldering portion for soldering to a circuit board. The metal sheet includes a plurality of soldering pins for soldering to the circuit board. The soldering pins are aligned with the ground soldering portion in the front-rear direction. In the left-right direction, the size of the soldering pins is greater than the size of the ground soldering portion.

11. The electrical connector of claim 1, wherein: The two plastic blocks are arranged on both sides of the insertion slot in the front-rear direction. Each plastic block is fixed to a corresponding terminal row. Opposite surfaces of the two plastic blocks are respectively concavely provided with a plurality of grooves. The ground terminal is exposed to the grooves. Each groove has inclined guide surfaces on both sides in the left-right direction. The distance between the two guide surfaces in the same groove gradually decreases in the direction close to the ground terminal. The protruding portion is located in the groove and is electrically coupled to the ground terminal. The left and right sides of the protruding portion are provided with inclined surfaces corresponding to the guide surfaces.

12. The electrical connector of claim 1, wherein: The two plastic blocks are arranged on both sides of the insertion slot in the front-rear direction. Each plastic block is fixed to a corresponding terminal row. Each plastic block includes a plurality of reinforcing portions abutting against the metal sheet. A rear plug is arranged between the two terminal rows. A metal sheet is arranged between each plastic block and the rear plug.

13. An electrical connector, characterized by The housing includes an insertion slot for downward insertion of a mating element. The two terminal rows are received in the housing. The two terminal rows are respectively arranged on both sides of the insertion slot in the front-rear direction. Each terminal row includes a plurality of signal terminals and a plurality of ground terminals arranged in the left-right direction. ​ Each signal terminal includes a signal contact portion exposed to the slot, the signal contact portion extends downward to form a signal elastic portion located in the shell, the signal elastic portion extends downward to form a signal holding portion located in the shell, the signal holding portion is flat, the signal holding portion is connected to a signal tail portion downward, the signal tail portion extends out of the shell, the signal holding portion includes a first end connected to the signal elastic portion and a second end connected to the signal tail portion; At least one loss member is arranged between the two terminal rows, the loss member includes a base portion, a plurality of protrusions are formed from the base portion towards the ground terminals, the protrusions are electrically coupled with the ground terminals; Two plastic blocks are respectively arranged on the front and rear sides of the slot, each plastic block is fixed with the signal holding portions of each terminal row; At least one metal sheet is arranged between the terminal rows and the base portion; The signal holding portions extend obliquely from bottom to top towards the metal sheet, in the front-rear direction, a first distance is between the first end and the metal sheet, the first distance is between 0.25mm and 0.40mm, a second distance is between the second end and the metal sheet, the second distance is between 0.52mm and 0.70mm.

14. The electrical connector of claim 13, wherein: The metal sheet includes a body portion extending vertically in the up-down direction, in the front-rear direction, the body portion overlaps with the signal holding portions, a plurality of isolation portions are formed from the upper end of the body portion upwards to the slot, in the front-rear direction, the isolation portions overlap with the signal elastic portions, and the isolation portions are substantially parallel to the signal elastic portions.

15. The electrical connector of claim 13, wherein: The two plastic blocks are respectively arranged on the front and rear sides of the slot, each plastic block is fixed with the signal holding portions of each terminal row, in the front-rear direction, a third distance is between the isolation portions and the signal elastic portions, and the third distance is less than the first distance.

16. The electrical connector of claim 13, wherein: The two plastic blocks are respectively arranged on the front and rear sides of the slot, each plastic block is fixed with the signal holding portions of each terminal row, each signal receiving slot is provided with a signal terminal pair composed of two signal terminals, in the same signal terminal pair, the distance between the opposite sides of the two signal elastic portions is less than the distance between the opposite sides of the two signal holding portions.

17. The electrical connector of claim 13, wherein: The shell is further provided with a plurality of signal receiving slots and a plurality of ground receiving slots on the front and rear sides of the slot, the signal terminals are received in the signal receiving slots, the ground terminals are received in the ground receiving slots, a partition is between the left and right adjacent ground receiving slots and signal receiving slots, each signal receiving slot has a first side wall and a second side wall arranged oppositely, the partition recesses a first accommodation slot from the first side wall, and the partition recesses a second accommodation slot from the second side wall, the metal sheet includes a plurality of isolation portions, in the front-rear direction, the isolation portions overlap with the signal elastic portions, the isolation portions are located in the first accommodation slot and the second accommodation slot, and the isolation portions exceed the signal elastic portions in the left-right direction.

18. The electrical connector of claim 13, wherein: Each ground terminal includes a ground contact portion exposed to the slot, the ground contact portion extends downward to form a ground elastic portion located in the ground receiving slot, the ground elastic portion extends downward to form a ground holding portion, an extension portion is arranged on the upper end of the protrusion, the protrusion is electrically coupled with the ground holding portion, the extension portion is between the slot and the ground elastic portion, and there is a gap between the extension portion and the ground elastic portion.

19. The electrical connector of claim 13, wherein: The electric connector further comprises two plastic blocks on the front and back of the slot, each of the plastic blocks is fixed with a corresponding terminal row, and the top of the protruding part is higher than the top of the plastic block.

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