TW202101831A - Low-profile edge connector and connector system using same - Google Patents

Abstract

An edge connector is configured to connect to a circuit board. The edge connector includes first, second and third terminal mounts which define a plurality of first, second and third terminal receiving passageways. First terminals are mounted in the first passageways; second terminals are mounted in the second passageways; and third terminals are mounted in the third passageways. The first terminals carry a first electrical specification of the edge connector and the second and third terminals carry a second electrical specification of the edge connector which is different than the first electrical specification.

Description

Low-height edge connector and connector system using the same

The present disclosure relates to the field of connectors, and more specifically to the field of connectors that can be connected to an edge of a circuit board.

Connectors that can be mounted on an edge of a circuit board are known. Although existing designs can be effective, they often have a higher height than required and require more board space than required. Therefore, some people will appreciate an improved connector for mounting on an edge of a circuit board.

An edge connector is configured to be mounted on an edge of a circuit board. The edge connector has a low height and can be removed, and provides a reliable and firm electrical connection. The edge connector includes first, second, and third terminal blocks defining a plurality of first, second, and third terminal receiving passages. A plurality of first terminals are installed in the plurality of first channels. A plurality of second terminals are installed in the plurality of second channels. A plurality of third terminals are installed in the plurality of third channels. The plurality of first terminals carry a first electrical specification of the edge connector, and the plurality of second terminals and the plurality of third terminals carry a second electrical specification of the edge connector, so The second electrical specification is different from the first electrical specification. A movable buckle extends from the first terminal base. The buckle is located between the second terminal base and the third terminal base.

The following detailed description describes exemplary embodiments, and the disclosed features are not intended to be limited to explicitly disclosed combinations. Therefore, unless otherwise stated, the features disclosed herein may be combined together to form additional combinations not otherwise shown for the sake of brevity.

As shown in FIGS. 1 and 2, a connector system 20 includes a circuit board 22 configured to interface with a low-height edge connector 24. The low-height edge connector 24 includes a housing 26 that supports a plurality of terminals 28, 30a-d. The housing 26 may be formed of an insulating material. The housing 26 includes an integral buckle 32 configured to attach the edge connector 24 to the circuit board 22. The housing 26 implements a touch safety connector and has a circuit board accommodating groove 34. The circuit board accommodating groove 34 extends between the two sides of the housing 26 and is configured to engage the circuit board 22. The housing 26 is designed to guide the circuit board 22 into the circuit board receiving groove 34. The terminals 28, 30a-d are connected to the circuit board. Directional terms such as front, back, up, and down are used herein to easily describe the edge connector 24. The use of these terms does not indicate the required orientation of the edge connector 24 during assembly and use.

The circuit board 22 is formed in a known manner. As best shown in FIGS. 3 and 4, the circuit board 22 has flat upper and lower surfaces 22a, 22b and a plurality of edges, of which at least one edge 40 is at least partially flat. A first set of 42 spaced-apart contact pads is disposed on the lower surface 22b near the edge 40. A second group 44a of spaced contact pads is disposed on the lower surface 22b near the edge 40 and adjacent to one side of the first group 42. A third group 44b of spaced contact pads is disposed on the lower surface 22b adjacent to the edge 40 on the other side of the first group 42. The second group 44a and the third group 44b are spaced apart from each other by the first group 42. In some embodiments, the fourth and fifth sets 44a', 44b' of spaced contact pads are provided on the upper surface 22a near the edge 40. Each contact point in the fourth group 44a' is vertically aligned with a corresponding contact point in the second group 44a. Each contact point in the fifth group 44b' is vertically aligned with a corresponding contact point in the third group 44b. A locking hole 48 extends from the upper surface 22 a through the circuit board 22 to the lower surface 22 b, is spaced apart from the edge 40 and intersects the first group 42. A first slot 50 extends from the upper surface 22a through the circuit board 22 to the lower surface 22b, extends forward from the edge 40, and is located between adjacent contact pads of the second set 44a. The groove 50 has side walls 50a, 50b extending from the edge 40 and parallel to each other, and one end wall 50c at the front ends of the side walls 50a, 50b. The second groove 52 extends from the upper surface 22a through the circuit board 22 to the lower surface 22b, extends forward from the edge 40, and is located between adjacent contact pads of the third set 44b. The groove 52 has side walls 52a, 52b extending from the edge 40 and parallel to each other, and an end wall 52c at the front ends of the side walls 52a, 52b. The grooves 50, 52 may have different widths or may have the same width.

The terminals 28, 30a-d are configured to carry different electrical requirements for the operation of the connector system 20. The first terminal 28 carries a first electrical specification (specification) of the edge connector 24, and the second and third terminals 30 a-d carry a second electrical specification of the edge connector 24. In some embodiments, terminal 28 is a signal terminal, and terminals 30a-d are power terminals. In some embodiments, terminal 28 is a low power terminal and terminals 30a-d are high power terminals. In one embodiment, the terminal 28 is formed of a first shape, and the terminals 30a-d are formed of a second shape different from the first shape.

As best shown in FIG. 6, each terminal 28 is composed of a flat main body 54, a plurality of feet 56 extending upward from a rear end of the main body 54, a curved contact portion 58 extending upward from the front of the main body 54, and A tang 60 extending downward is formed. In use, the feet 56 crimp the associated wires 62. In one embodiment, the terminal 28 may have a double beam structure, which allows the terminal 28 to have the required positive force without requiring a thick terminal contact portion.

As best shown in FIG. 7, each terminal 30a-d is formed by a flat upper main body portion 64, a flat lower main body portion 66, and a curved side main body portion 68 along the upper, One side of the lower body portions 64 and 66 connects the upper body portion 64 and the lower body portion 66 along the longitudinal length of the upper and lower body portions 64 and 66. In one embodiment, a plurality of spaced upper elastic fingers 70 extend longitudinally from a front end of the upper main body portion 64, and a plurality of spaced lower elastic fingers 72 extend longitudinally from a front end of the lower main body portion 66. In other embodiments, a single upper elastic finger 70 extends longitudinally from the front end of the upper main body portion 64 and a single lower elastic finger 72 extends longitudinally from the front end of the lower main body portion 66. In some embodiments, at least one elastic finger 74 extends longitudinally from a front end of the side body portion 68. If elastic fingers 74 are provided, the side walls 50a, 50b, 52a, 52b of the grooves 50, 52 are provided with contact pads that connect each contact pad in the groups 44a, 44b to the corresponding contact pads in the groups 44a', 44b' (Not shown). Except for the curved portion 76 provided along its length, each elastic finger 70, 72 (and the elastic finger 74 if provided) is flat. Each elastic finger 70, 72, 74 is configured to flex relative to the respective main body portion 64, 66, 68. A U-shaped crimp body portion 78 extends from a rear end of each body portion 64, 66, 68. In use, the crimping main body 78 crimps an associated wire 80. An upper buckle portion 82 extends upward from the upper body portion 64, and a lower buckle portion 84 extends downward from the lower body portion 66. The upper buckle portion 82 can bend relative to the upper main body portion 64, and the lower buckle portion 82 can bend relative to the lower main body portion 66.

In some embodiments, the side body portion 68 and any elastic fingers 74 and the lower body portion 66, the elastic fingers 72 and the snap portions 84 thereof are eliminated, so that each terminal 30a-d only includes the flat upper body portion 64 and its The upper buckle portion 82, at least one upper elastic finger 70 extending from the front end of the upper main body portion 64, and a crimping main body portion 78 extending from the rear end of the upper main body portion 64. In these embodiments, only the contact pad groups 44 a and 44 b are provided on the upper surface 22 a of the circuit board 22.

As shown in Figures 1, 2 and 8 to 12, the housing 26 consists of a first central terminal base 90, a second outer terminal base 92 extending laterally from one side of the central terminal base 90, and A third outer terminal base 94 extending laterally on the other side of the central terminal base 90 is integrally formed. The central terminal base 90 accommodates the terminal 28 therein; the first outer terminal base 92 houses the terminals 30a, 30b. The second outer terminal base 94 accommodates the terminals 30c and 30d therein. The buckle 32 is integrally formed with the central terminal base 90.

As best shown in FIGS. 8 to 10, the central terminal base 90 has a front end 90a and a rear end 90b, an upper wall 96 extending longitudinally between the front end 90a and the rear end 90b, and a longitudinal direction between the front end 90a and the rear end 90b. The extended lower wall 98, the longitudinally extending side walls 100, 102 between the front end 90a and the rear end 90b and between the side edges of the upper and lower walls 96, 98, and between the front and rear ends 90a, 90b and on the upper , A plurality of spaced partition walls 104 extending longitudinally between the lower walls 96 and 98. The upper wall 96 and the lower wall 98 are parallel to each other. The side walls 100, 102 and the partition wall 104 are parallel to each other and perpendicular to the upper and lower walls 96, 98. The walls 96, 98, 100, 102, and 104 form a plurality of longitudinally extending terminal receiving passages 106 for receiving the terminals 28. The upper wall 96 extends from the rear end 90b but terminates before the front end of the lower wall 98 and the partition wall 104, so that the upper front portion of the terminal receiving channel 106 has an open upper end 108, as shown in FIG. In addition, the partition wall 104 has a portion 104 a in front of the front end 96 a of the upper wall 96, and the vertical height of the portion 104 is lower than the portion 104 b behind the front end 96 a of the upper wall 96. Each wall 100, 102 and each partition wall 104 has a cavity 105 on the side facing the terminal receiving channel 106. In front of the front end 96a of the upper wall 96, the lower wall 98 has a plurality of cutouts 110. Referring to FIGS. 2 and 10, the cutouts 110 extend from the front end of the housing 26 and are aligned with the terminal receiving passage 106, so that the front of the terminal receiving passage 106 The part has an open lower end. A portion of each terminal receiving channel 106 in front of the front end 96 a of the upper wall 96 forms a part of the circuit board receiving groove 34.

It is explained that one of the terminals 28 is placed in one of the terminal receiving channels 106, but it should be understood that the other terminals 28 are placed in the terminal receiving channels 106 in the same manner. The flat main body 54 is placed on an upper surface of the lower wall 98, and the crimping main body portion 78 extends rearward from the flat main body 54. The curved contact portion 58 is placed in the cutout 110 and the recess 105 and extends into the open upper end 108 in an unflexed state. The snap portion 60 is engaged with a rear end surface 110 a of the cutout 110 to fix the terminal 28 in the terminal receiving channel 106 and prevent the terminal 28 from being removed from the housing 26.

Each terminal block 92, 94 is formed identically, and therefore only the terminal block 92 is described.

As best shown in Figures 8 and 11, the terminal block 92 has a front end 92a and a rear end 92b, an upper wall 126 extending between the front end 92a and the rear end 92b, and a lower end extending between the front end 92a and the rear end 92b. Wall 128, side walls 130, 132 extending longitudinally between the front end 92a and the rear end 92b and between the side edges of the upper wall 126 and the lower wall 128, and between the front end 92a and the rear end 92b and between the upper wall 126 and A partition wall 134 extends longitudinally between the lower walls 128. The upper wall 126 and the lower wall 128 are parallel to each other. The side walls 130 and 132 and the partition wall 134 are parallel to each other and perpendicular to the upper wall 126 and the lower wall 128. The side wall 130 is integrally formed with the side wall 100 of the central terminal base 90. The walls 126, 128, 130, 132, and 134 form a plurality of longitudinally extending terminal receiving passages 136 for receiving the terminals 30. The side walls 130 and 132 extend from the rear end 92b but terminate before the front end 92a, so that the front part of the terminal receiving channel 136 has open side edges and forms a part of the circuit board receiving groove 34. The partition wall 134 extends from the rear end 92b to the front end 92a. Referring to FIG. 11, a protrusion 140 extends downward from the upper wall 126 into each terminal receiving channel 136 and forms a front wall 140a perpendicular to the upper wall 126, and a rear wall inclined with respect to the upper wall 126 and forming a chamfer. 140b and extending between the front wall 140a and the rear wall 140b and parallel to the lower surface 140c of the upper wall 126. Referring to FIG. 11, a protrusion 142 extends upward from the lower wall 128 into each terminal receiving channel 136 and forms a front wall 142a perpendicular to the lower wall 128, and a rear wall 142b that is inclined relative to the lower wall 128 and forms a chamfer. And extending between the front wall 142a and the rear wall 142b and parallel to the lower surface 142c of the lower wall 128. The front walls 140a, 142a are aligned with each other. The terminal receiving channel 106 in the terminal base 90 is parallel to the terminal receiving channel 136 in the terminal bases 92 and 94.

The terminals 30 a and 30 b are placed in the terminal module 92, and the terminals 30 c and 30 d are placed in the terminal module 94. In each terminal accommodating passage 136, the upper main body portion 64 is close to the upper wall 126 and the free end of the snap portion 82 is engaged with the wall 140a, and the lower main body portion 66 is close to the lower wall 128 and the free end of the snap portion 84 is connected to the front wall. 142a is engaged. The engagement of the snap portions 82 and 84 with the terminal modules 92 and 94 prevents the terminal 30 from being removed from the housing 26. In each terminal receiving channel 136, the upper elastic fingers 70, 72 extend in front of the front walls 140a, 142a, and the crimping body portion 78 extends rearward from the rear wall 140b and is placed in the terminal receiving channel 136. Each terminal 30a-d is inserted through the rear end 92b of the terminal module 92, 94 and pushed in toward the front end 92a of the terminal module 92, 94. The chamfers provided by the rear walls 140b, 142b of the protrusions 140, 142 provide guidance on the surface to which the elastic fingers 70, 72 are engaged. When the elastic fingers 70, 72 pass the protrusions 140, 142, the elastic fingers 70, 72 face each other. Internal deflection. Similarly, the rear walls 140b, 142b provide guidance on the surface to which the snap portions 82, 84 are engaged. When the snap portions 82, 84 pass the protrusions 140, 142, the snap portions 82, 84 flex inwardly toward each other . Once the catching parts 82, 84 pass the protrusions 140, 142, the catching parts 82, 84 return to their elastic recovery positions. In one embodiment, the side body portions 68 of the terminals 30 a and 30 b are close to the partition wall 134 in the terminal module 92, and the side body portions 68 of the terminals 30 c and 30 d are near the partition wall 134 in the terminal module 94.

The rear end 90b of the center terminal base 90 is located in front of the rear ends 92b of the outer terminal bases 92, 94. The front end 90a of the center terminal block 90 is located behind the front ends 92a of the outer terminal blocks 92 and 94. The buckle 32 extends from the upper surface of the upper wall 96 and extends forward above the open upper end 108 of the terminal receiving channel 106 and enters the circuit board receiving groove 34. The buckle 32 is located between the outer terminal seats 92 and 94. The buckle 32 is formed by a cantilevered arm 114 and a cantilevered actuation shoulder 118 which are respectively arranged on the opposite side of the fulcrum 120, and the arm 114 has at one end a locking hole 48 in the circuit board 22. A joining element 116. The arm 114 extends parallel to the side walls 100,102. The engaging element 116 extends in front of the central terminal base 90. The actuation shoulder 118 is attached to the end of the arm 114 and is provided between the terminal modules 92, 94. In an embodiment, the engaging element 116 may be a hook with a chamfered front end. In an embodiment, the pivot 120 may be a double pivot. In an embodiment, the fulcrum 120 may be a single fulcrum.

The actuating shoulder 118 has an upper surface, and the user's fingers can engage the upper surface to actuate the buckle 32. When viewed from the side of the housing 26, the upper surface of the actuating shoulder 118 is flush or slightly higher than the top surface of the terminal blocks 92, 94. The upper surface of the actuation shoulder 118 may be ribbed or embossed to facilitate the user's finger grip. In the rest position as described herein, the lower surface of the actuation shoulder 118 is spaced from the base wall 96. Because the buckle 32 is located between the terminal bases 92, 94 and the upper surface of the actuation shoulder 118 is flush or slightly higher than the top surface of the terminal bases 92, 94, a low-height edge connector 24 is provided.

When the buckle 32 is in the rest position, the engagement element 116 is aligned with the upper wall 96. When the actuating shoulder 118 is pressed to move the buckle 32 to the trigger position, the actuating shoulder 118 moves close to the upper wall 96, the fulcrum 120 flexes, and the engagement element 116 moves out of alignment with the upper wall 96. When the pressure is released, the buckle 32 returns to its rest position.

In order to connect the circuit board 22 with the edge connector 24, the edge 40 of the circuit board 22 is inserted into the circuit board receiving slot 34. As the circuit board 22 slides into the circuit board receiving groove 34, the partition walls 134 of the terminal seats 92 and 94 slide along the groove 50. The curved contact portion 58 engages with the edge 40 of the circuit board 22 and flexes downward toward the flat main body 54 and slides along the contact pads of the first group 42. The bent contact portion 58 engages with the first set 42 of spaced contact pads on the circuit board 22 and the edge connector 24 and is on the circuit board 22 of the first set 42 of spaced contact pads and the edge connector 24 An electrical path is formed between. The fingers 70, 72 flex away from each other when in contact with the edge 40 and slide along the contact pads of the groups 44a, 44b, 44a', 44b'. The bent portion 76 of each finger 70, 72 is engaged with the contact pads of the groups 44a, 44b, 44a', 44b' on the circuit board 22 and the edge connectors 24 and is on the groups 44a, 44b, 44a', of the circuit board 22. An electrical path is formed between the contact pad of 44b' and the edge connector 24. If the finger 74 is provided, the finger 74 flexes when engaged with the circuit board 22 and slides along the contact pads (not shown) provided on the side walls 50a, 50b, 52a, 52b, and the curved portion 76 of the finger 74 is on the circuit board An electrical path is formed between 22 and the edge connector 24. When the front end of the engaging element 116 of the buckle 32 engages with the edge 40 of the circuit board 22, the engaging element 116 pivots away from the upper surface 22b of the circuit board 22 and slides along the upper surface 22b until the engaging element 116 is seated in the locking hole Within 48. If each slot 50, 52 in the circuit board 22 is sized to accommodate only one of the partition walls 134, the edge connector 24 cannot be inserted into the circuit board 22 upside down. The engagement of the engagement element 116 with the locking hole 48 prevents the edge connector 24 from being removed from the circuit board 22.

By pressing the actuation shoulder 118 to move the buckle 32 to the trigger position, the circuit board 22 can be removed from the edge connector 24. This moves the engaging element 116 out of the locking hole 48 and can pull the circuit board 22 out of the circuit board receiving groove 34 of the edge connector 24. Thereafter, the actuation shoulder 118 is released to move the buckle 32 to the rest position.

Although the figure shows that the central terminal base 90 includes four terminals 28, it should be understood that fewer than four channels 106 or more than four channels 106 may be drilled through the terminal base 90 to accommodate more or less The terminals 28 and the same number of related contact pads are provided on the circuit board 22. Although the drawings show that each terminal block 92, 94 includes two terminals 30, it should be understood that more than two channels 136 can pass through each terminal block 92, 94 to accommodate more terminals 30, and the same A number of related contact pads are provided on the circuit board 22.

In addition, although a single buckle 32 is shown, the central terminal base 90 may be lengthened to provide another buckle. If multiple buckles are provided, these buckles can be coupled together so that actuating one of the buckles can activate the remaining buckles.

The disclosure provided herein illustrates the features by means of its preferred and exemplary embodiments. By reading the present disclosure, those of ordinary skill in the art can come up with other embodiments, modifications, and variations that fall within the scope of the attached patent application and its spirit.

20: Connector system 22: circuit board 22a: upper surface 22b: lower surface 24: Edge connector 26: shell 28, 30a-d: terminal 32: buckle 34: Circuit board receiving slot 40: Edge 42: The first group 44a: The second group 44b: third group 44a': Group 4 44b': Group 5 48: lock hole 50: first slot 50a, 50b: side wall 50c: end wall 52: second slot 52a, 52b: side wall 52c: end wall 54: main body 56: Feet 58: Bend contact 60: buckle 62: Wire 64: Upper body 66: Lower main body 68: Side body 70: Upper elastic finger 72: Lower elastic finger 74: Elastic finger 76: curved part 78: Crimping the main body 80: wire 82: Upper buckle part 84: Lower snap part 90: Central terminal block 90a: front end 90b: backend 92: The second terminal block 92a: front end 92b: backend 94: third terminal block 96: upper wall 98: lower wall 100, 102: side wall 104: Partition Wall 104a, 104b: part 105: cavities 106: Terminal housing channel 108: upper end 110: incision 110a: rear face 114: arm 116: Joint element 118: Actuate the shoulder 120: pivot 126: upper wall 128: lower wall 130, 132: side wall 134: Partition Wall 136: terminal receiving channel 140: protrusion 140a: front wall 140b: back wall 140c: bottom surface 142: Prominence 142a: front wall 142b: back wall 142c: lower surface

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 shows a top perspective view of a connector system including an embodiment of a low-height edge connector; Figure 2 shows a bottom perspective view of the connector system; Figure 3 shows a bottom plan view of the connector system circuit board; Figure 4 shows a top plan view of the circuit board; Figure 5 shows a bottom perspective view of the connector system, in which the housing of the connector system is removed so that the internal components can be seen; Figure 6 shows a top perspective view of a first terminal of the connector system; Figure 7 shows a top perspective view of a second or third terminal of the connector system. Figure 8 shows a cross-sectional view of the connector system viewed from the rear of the connector system; Figure 9 shows a cross-sectional view of the connector system through a snap of the connector system; Figure 10 shows a cross-sectional view of the connector system through one of the first terminals of the connector system; Figure 11 shows a cross-sectional view of the connector system through one of the second terminals of the connector system; and Fig. 12 shows a cut-away view of Fig. 11 in a perspective view.

20: Connector system

22: circuit board

22a: upper surface

22b: lower surface

24: Edge connector

26: shell

32: buckle

34: Circuit board receiving slot

40: Edge

48: lock hole

50: first slot

52: second slot

62: Wire

80: wire

90: Central terminal block

92: The second terminal block

92a: front end

92b: backend

94: third terminal block

134: Partition Wall

Claims (20)

An edge connector configured to be connected to a circuit board, the edge connector comprising: A first terminal base having a plurality of walls defining a front end and a rear end, a first side and a second side opposite to each other, and defining a plurality of first terminal receiving passages extending longitudinally therethrough; A plurality of first terminals installed in the plurality of first terminal receiving channels; A second terminal block having a plurality of walls defining a front end and a rear end, and opposite first and second sides, and defining a plurality of second terminal receiving passages extending longitudinally therethrough, the second The terminal seat is located on the first side of the first terminal seat, and the plurality of second terminal receiving passages are parallel to the plurality of first terminal receiving passages; A plurality of second terminals installed in the plurality of second terminal receiving channels; A third terminal block having a plurality of walls defining a front end and a rear end, and opposite first and second sides, and defining a plurality of third terminal receiving passages extending longitudinally therethrough, the third The terminal seat is located on a second side of the first terminal seat, and the plurality of third terminal receiving passages are parallel to the plurality of first terminal receiving passages and the plurality of second terminal receiving passages; and A plurality of third terminals installed in the plurality of third terminal receiving channels; Moreover, the plurality of first terminals carry a first electrical specification of the edge connector, and the second terminal and the third terminal carry a second electrical specification of the edge connector. The edge connector according to claim 1, wherein the plurality of first terminals are signal terminals, and the plurality of second terminals and the plurality of third terminals are power terminals. The edge connector according to claim 1, wherein the plurality of first terminals are low-power terminals, and the plurality of second terminals and the plurality of third terminals are high-power terminals. The edge connector according to claim 1, wherein the plurality of first terminals are formed of a first shape, and the plurality of second terminals and the plurality of third terminals are formed of different shapes from the first shape. A second shape is formed. The edge connector according to claim 1, further comprising a movable buckle extending from an upper surface of the first terminal base, and the buckle is located between the second terminal base and the Between the third terminal block. The edge connector according to claim 5, wherein the buckle includes a hook. The edge connector according to claim 1, wherein a circuit board receiving groove is formed at the front end of the plurality of terminal blocks. The edge connector according to claim 1, wherein each first terminal includes a flat body, a curved contact portion, and at least a pair of feet capable of crimping an associated wire. The edge connector according to claim 8, wherein each first terminal further includes a buckle portion extending from the flat body, and the buckle portion is engaged with one of the walls of the first terminal base . The edge connector according to claim 9, wherein the first terminal base includes a surface combined with the buckle portion. The edge connector according to claim 1, wherein each of the second and third terminals includes: a flat upper body part; a flat lower body part; a curved side body part that connects the upper body part And one side of the lower main body portion to connect the upper main body portion and the lower main body portion together along the longitudinal length of the upper main body portion and the lower main body portion; at least one upper elastic finger, which extends from the A front end of the upper main body portion extends longitudinally; at least one lower elastic finger extending longitudinally from a front end of the lower main body portion; and a crimping main body portion extending from the two main body portions and capable of crimping an associated wire . The edge connector according to claim 11, wherein each of the second and third terminals further includes at least one elastic finger extending longitudinally from a front end of the side body portion. The edge connector according to claim 12, wherein each second terminal further includes a buckle portion extending from at least one of an upper body portion and a lower body portion thereof, and the buckle portion and the second One of the walls of the terminal base is engaged, and each third terminal further includes a buckle portion extending from at least one of the upper body portion and the lower body portion thereof, the buckle portion and one of the third terminal base Wall joint. The edge connector according to claim 11, wherein each first terminal includes a flat body, a curved contact portion, and at least a pair of feet capable of crimping an associated wire. A connector system includes: A circuit board having a first set of contact pads, a second set of contact pads, and a third set of contact pads disposed thereon, the circuit board having a rear edge extending from its rear edge and in the second set of contact pads A first groove extending between adjacent contact pads, and the circuit board has a second groove extending from the rear edge thereof and extending between adjacent contact pads in the third group of contact pads; and An edge connector, including: A first terminal block having a front end and a rear end, an upper wall extending between the front end and the rear end, a lower wall extending between the front end and the rear end, and A partition wall extending between the front end and the rear end and defining a plurality of first terminal receiving passages extending longitudinally therethrough, A plurality of first terminals installed in the plurality of first terminal receiving channels and configured to be connected to the first set of contact pads, A second terminal block has a front end and a rear end, an upper wall extending between the front end and the rear end, a lower wall extending between the front end and the rear end, and A partition wall extending between the front end and the rear end and defining a plurality of second terminal accommodating passages extending longitudinally therethrough, the second terminal seat is located on a first side of the first terminal seat, the The plurality of second terminal receiving channels are parallel to the plurality of first terminal receiving channels, A plurality of second terminals are installed in the plurality of second terminal accommodating channels and configured to be connected to the second set of contact pads, A third terminal block has a front end and a rear end, an upper wall extending between the front end and the rear end, a lower wall extending between the front end and the rear end, and A partition wall extending between the front end and the rear end and defining a plurality of third terminal receiving passages extending longitudinally therethrough, the third terminal seat is located on the second side of the first terminal seat, the plurality of The third terminal receiving channel is parallel to the plurality of first terminal receiving channels and the plurality of second terminal receiving channels, and A plurality of third terminals installed in the plurality of third terminal receiving channels and configured to be connected to the third set of contact pads, Wherein the plurality of first terminals carry a first electrical specification of the edge connector, the plurality of second terminals and the plurality of third terminals carry a second electrical specification of the edge connector, The partition wall of the second terminal base and the third terminal base is located in the two grooves of the circuit board. The connector system according to claim 15, wherein: The second set of contact pads and the third set of contact pads are on a first side of the circuit board, The circuit board further has a fourth set of contact pads on a second side, the fourth set of contact pads are vertically aligned with the second set of contact pads, and the plurality of second terminals are further configured as Connected to the fourth set of contact pads, and the circuit board also has a fifth set of contact pads on the second side of the circuit board, the fifth set of contact pads and the third set of contact pads are vertical Aligning, wherein the plurality of third terminals are further configured to be connected to the fifth set of contact pads; Furthermore, each second terminal has at least one first elastic finger configured to be connected to the corresponding contact pad in the second group and at least one second elastic finger configured to be connected to the corresponding contact pad in the fourth group. Elastic finger, Furthermore, each third terminal has at least one first elastic finger configured to be connected to a corresponding contact pad in the third group and at least one second elastic finger configured to be connected to a corresponding contact pad in the fifth group. Elastic refers to. The connector system according to claim 15, wherein: A contact pad that electrically connects the second set of contact pads and the fourth set of contact pads together is provided on the longitudinally extending side of the first groove, and wherein each second terminal also has a contact pad configured to connect At least one first elastic finger corresponding to the contact pad on the longitudinally extending side of the first groove, Wherein, a contact pad for electrically connecting the third group of contact pads and the fifth group of contact pads is provided on the longitudinally extending side of the second groove, and wherein each third terminal also has a configuration It is at least one first elastic finger connected to the corresponding contact pad on the longitudinally extending side of the second groove. The connector system according to claim 15, wherein the circuit board further includes a locking hole, and wherein the edge connector further includes a movable card extending from the upper surface of the first terminal base The buckle is located between the second terminal base and the third terminal base, and the buckle is configured to fit with the locking hole. The connector system according to claim 15, wherein the plurality of first terminals are signal terminals, and the plurality of second terminals and the plurality of third terminals are power terminals. The connector system according to claim 15, wherein the plurality of first terminals are low-power terminals, and the plurality of second terminals and the plurality of third terminals are high-power terminals.

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