Electrical Connectors and Board Assemblies

Abstract

To provide a technique capable of reducing a current path length without losing connection reliability in a contact.SOLUTION: An elastic deformation part 82 includes: an upper contact part 85 that can come into contact with a signal pad 10 corresponded to any one of a plurality of signal pads 10; and a lower contact part 87 that is provided at an input and output board 4, and can come into contact with a short circuit pad 16 of which a potential is similar to a main pad 15A. In a contact 33, the lower contact part 87 is separated from the short circuit pad 16 when the upper contact part 85 is separated from the signal pad 10, and the lower contact part 87 comes into contact with the short circuit pad 16 when the elastic deformation part 82 is elastically deformed due to the upper contact part 85 coming into contact with the signal pad 10. Then, a current path length from the upper contact part 85 to the lower contact part 87 is shorter than that from the upper contact part 85 to a soldering part 81.SELECTED DRAWING: Figure 13

Description

[Technical Field]

[0001] The present invention relates to an electrical connector and a board assembly. [Background technology]

[0002] Patent Document 1 discloses a board-to-board connector 101 in which a plurality of contacts 100 are arranged in a row, as shown in FIG. 19 of the present application. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6901603 Summary of the Invention [Problem to be solved by the invention]

[0004] The shorter the current path length in the contact, the lower the resistance value in the current path. However, shortening the current path length in the contact directly leads to the contact becoming hard, which reduces connection reliability.

[0005] An object of the present invention is to provide a technique for shortening the length of the current path without impairing the connection reliability of the contacts. [Means for solving the problem]

[0006] According to a first aspect of the present invention, there is provided an electrical connector comprising: a housing; and a plurality of contacts held in the housing, the plurality of contacts electrically connecting a plurality of connection-object-side conductors provided on a connection object and a plurality of board-side conductors provided on a board, the plurality of contacts including a first contact, the first contact including a fixing portion fixed to the housing, a soldering portion soldered to a first board-side conductor as a corresponding board-side conductor among the plurality of board-side conductors, and a cantilever-shaped elastically deforming portion extending from the fixing portion, the elastically deforming portion being configured to fix the first contact to the corresponding connection-object-side conductor among the plurality of connection-object-side conductors. An electrical connector is provided, which includes a first contact portion capable of contacting a first connection object side conductor as a conductor, and a second contact portion capable of contacting a second board side conductor provided on the board and at the same potential as the first board side conductor, wherein the first contact is configured such that when the first contact portion is away from the first connection object side conductor, the second contact portion is away from the second board side conductor, and when the first contact portion comes into contact with the first connection object side conductor and the elastic deformation portion elastically deforms, the second contact portion comes into contact with the second board side conductor, and the current path length from the first contact portion to the second contact portion is shorter than the current path length from the first contact portion to the soldering portion. The elastic deformation portion is configured such that two spring pieces extending parallel to each other and spaced apart from each other in the pitch direction and having both ends connected are interposed between the first contact portion and the fixed portion, and the second contact portion may be positioned between the two spring pieces in the pitch direction. The second contact portion may extend in a cantilever manner in a direction away from the fixed portion. The elastic deformation portion is configured such that a U-shaped bent portion is interposed between the first contact portion and the fixed portion, and the second contact portion may be a part of the U-shaped bent portion. The U-shaped curved portion may include a fixed portion side straight portion, a curved portion, and a first contact portion side straight portion in this order from the fixed portion to the first contact portion, and the curved portion may function as the second contact portion. The elastic deformation portion may be configured such that a U-shaped bent portion is interposed between the first contact portion and the fixed portion, and the second contact portion may extend in a cantilever manner from the first contact portion toward the substrate. The U-shaped curved portion, the first contact portion, and the second contact portion may be connected in this order. The elastic deformation portion is configured such that a U-shaped bent portion is interposed between the first contact portion and the fixed portion, the second contact portion extends in a cantilever manner from the first contact portion toward the substrate, the elastic deformation portion further includes a third contact portion, and the second contact portion is configured to be able to contact the third contact portion instead of being able to contact the second substrate-side conductor, the first contact is configured such that when the first contact portion is away from the first connection object-side conductor, the second contact portion is away from the third contact portion, and when the first contact portion comes into contact with the first connection object-side conductor and the elastic deformation portion elastically deforms, the second contact portion comes into contact with the third contact portion, and the current path length from the first contact portion via the second contact portion and the third contact portion to the soldering portion may be shorter than the current path length from the first contact portion to the soldering portion via the U-shaped bent portion. The U-shaped curved portion may include two spring pieces extending parallel to each other and spaced apart from each other in the pitch direction, and having both ends connected, and the third contact portion may protrude in a cantilever-like manner between the two spring pieces in the pitch direction. The plurality of contacts may include a signal contact for differential transmission and a ground contact, and the first contact may be employed as at least the ground contact. A board assembly is provided in which the electrical connector is mounted on the board. [Effects of the Invention]

[0007] According to the present invention, the length of the current path can be shortened without impairing the connection reliability of the contacts. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is an exploded perspective view of an information processing device (first embodiment). [Figure 2] 10 is a perspective view of the CPU board as seen from another angle (first embodiment); [Figure 3] 1 is a perspective view of a connector (first embodiment). [Figure 4] 1 is an exploded perspective view of a connector according to a first embodiment. [Figure 5] 1 is a perspective view of a housing (first embodiment). [Figure 6] 1 is a partially cutaway perspective view of a connector (first embodiment). [Figure 7] 1 is a partially cutaway perspective view of a connector (first embodiment). [Figure 8] 1 is a partially cutaway perspective view of a connector (first embodiment). [Figure 9] 7 is a cross-sectional view of the connector corresponding to FIG. 6 (first embodiment). [Figure 10] 1 is a perspective view of a contact (first embodiment). [Figure 11] 1 is a perspective view of the contact as seen from another angle (first embodiment); [Figure 12] 1 is a plan view of a contact (first embodiment). [Figure 13] 10A and 10B are explanatory diagrams of the operation of the contact (first embodiment). [Figure 14] 10 is an explanatory diagram of the operation of the contact (second embodiment). [Figure 15] 10 is a perspective view of a contact (third embodiment). [Figure 16] 10A and 10B are explanatory views of the operation of the contact (third embodiment). [Figure 17] 10 is a perspective view of a contact (fourth embodiment). [Figure 18] 10A and 10B are explanatory diagrams of the operation of the contact (fourth embodiment). [Figure 19] This is a simplified diagram of FIG. 3 of Patent Document 1. DETAILED DESCRIPTION OF THE INVENTION

[0009] (First embodiment) A first embodiment of the present invention will be described below with reference to Figs. 1 to 13. Fig. 1 shows an exploded perspective view of an information processing device 1 (electronic device). As shown in Fig. 1, the information processing device 1 includes a CPU board 2 (first board, connection object), a connector 3, an input / output board 4 (second board, board), and a support board 5. The CPU board 2, connector 3, input / output board 4, and support board 5 are stacked in this order. That is, the connector 3 is disposed between the CPU board 2 and the input / output board 4.

[0010] The CPU board 2 and the input / output board 4 are rigid boards such as paper phenol boards or glass epoxy boards.

[0011] Fig. 2 shows a perspective view of the CPU board 2 seen from a different angle. As shown in Figs. 1 and 2, the CPU board 2 has a connector-facing surface 2A that faces the connector 3. As shown in Fig. 2, a plurality of signal pad rows 6 are formed on the connector-facing surface 2A. In addition, a plurality of bolt fastening holes 8 are formed on the CPU board 2.

[0012] The multiple signal pad rows 6 extend parallel to one another. Each signal pad row 6 includes multiple signal pads 10 (connection target side conductors). Hereinafter, the longitudinal direction of each signal pad row 6 will be referred to as the pitch direction. The direction perpendicular to the pitch direction will be defined as the width direction. The multiple signal pad rows 6 are arranged in the width direction. The thickness direction of the CPU board 2 is perpendicular to the pitch direction and the width direction, and will be referred to as the up-down direction below. The up-down direction includes the downward direction toward which the connector-facing surface 2A faces, and the upward direction opposite to the downward direction. Note that the up-down direction, upward direction, and downward direction are merely defined for the convenience of explanation and do not indicate the orientation of the information processing device 1 or the connector 3 when actually in use.

[0013] The multiple bolt fastening holes 8 are arranged spaced apart from one another in the pitch direction. The multiple bolt fastening holes 8 include a first bolt fastening hole 8A, a second bolt fastening hole 8B, and a third bolt fastening hole 8C. The first bolt fastening hole 8A, the second bolt fastening hole 8B, and the third bolt fastening hole 8C are arranged in this order.

[0014] Returning to Fig. 1, the input / output board 4 has a connector-facing surface 4A that faces the connector 3. A plurality of signal pad rows 11 and a plurality of hold-down pads 12 are formed on the connector-facing surface 4A. The input / output board 4 also has a plurality of bolt fastening holes 13 formed therein.

[0015] The signal pad rows 11 extend parallel to one another and are aligned in the width direction. Each signal pad row 11 includes a plurality of signal pads 15 (substrate-side conductors).

[0016] The multiple bolt fastening holes 13 are arranged spaced apart from one another in the pitch direction. The multiple bolt fastening holes 13 include a first bolt fastening hole 13A, a second bolt fastening hole 13B, and a third bolt fastening hole 13C. The first bolt fastening hole 13A, the second bolt fastening hole 13B, and the third bolt fastening hole 13C are arranged in this order.

[0017] The support board 5 is typically part of a housing that houses the CPU board 2, connector 3, and input / output board 4, and is made of, for example, aluminum or an aluminum alloy. The support board 5 includes a flat board body 20 and a plurality of nuts 21. The plurality of nuts 21 protrude upward from the board body 20.

[0018] The multiple nuts 21 include a first nut 21A, a second nut 21B, and a third nut 21C. The first nut 21A, the second nut 21B, and the third nut 21C are arranged to correspond to the first bolt fastening hole 13A, the second bolt fastening hole 13B, and the third bolt fastening hole 13C of the input / output board 4, respectively.

[0019] The connector 3 is configured to be mountable on the connector-facing surface 4A of the input / output board 4. Fig. 3 shows a perspective view of the connector 3. Fig. 4 shows an exploded perspective view of the connector 3. As shown in Figs. 3 and 4, the connector 3 includes a rectangular, flat housing 30 made of insulating resin, a plurality of contact rows 31, and a plurality of hold-downs 32. The plurality of contact rows 31 and the plurality of hold-downs 32 are held in the housing 30.

[0020] The multiple contact rows 31 extend parallel to one another. The multiple contact rows 31 are aligned in the width direction. Each contact row 31 extends linearly along the pitch direction. Each contact row 31 includes multiple contacts 33. Each contact 33 is conductive and is formed by punching and bending a metal plate plated with, for example, copper or a copper alloy. The multiple contacts 33 include differential transmission signal contacts and ground contacts. Differential transmission signal contacts refer to signal contacts used for differential transmission.

[0021] 1, the multiple hold-downs 32 are arranged to correspond to the multiple hold-down pads 12 of the input / output board 4. Each hold-down 32 is formed by stamping and bending a metal plate such as a stainless steel plate.

[0022] 5 shows a perspective view of the housing 30. As shown in FIG. 5, the housing 30 has a CPU board-facing surface 30A as the housing's upper surface that faces upward to face the CPU board 2, and an input / output board-facing surface 30B as the housing's lower surface that faces downward to face the input / output board 4. The CPU board-facing surface 30A is the uppermost surface of the housing 30. The input / output board-facing surface 30B is the lowermost surface of the housing 30.

[0023] Returning to FIG. 1, the assembly procedure for the information processing device 1 will now be outlined.

[0024] First, the connector 3 is mounted on the input / output board 4. Specifically, the contact rows 31 are soldered to the signal pad rows 11, respectively, and the hold-downs 32 are soldered to the hold-down pads 12, respectively.

[0025] Next, the input / output board 4 equipped with the connector 3 is placed on the support board 5. At this time, the first nut 21A, the second nut 21B, and the third nut 21C of the support board 5 pass through the first bolt fastening hole 13A, the second bolt fastening hole 13B, and the third bolt fastening hole 13C of the input / output board 4, respectively.

[0026] The CPU board 2 is then attached to the support board 5 so as to overlap the connector 3. Specifically, the first bolt 40A is fastened to the first nut 21A through the first bolt fastening hole 8A and the first bolt fastening hole 13A, the second bolt 40B is fastened to the second nut 21B through the second bolt fastening hole 8B and the second bolt fastening hole 13B, and the third bolt 40C is fastened to the third nut 21C through the third bolt fastening hole 8C and the third bolt fastening hole 13C. By sandwiching the connector 3 between the CPU board 2 and the input / output board 4 in this manner, the multiple signal pads 15 of the input / output board 4 and the multiple signal pads 10 of the CPU board 2 shown in FIG. 2 are electrically connected to each other via the multiple contacts 33 of the connector 3.

[0027] The connector 3 of this embodiment is designed for high-speed transmission, and is intended for signals flowing through each contact 33 at frequencies from 10 GHz to 25 GHz. As an example, the connector 3 may be a differential transmission connector.

[0028] The connector 3 will now be described in more detail.

[0029] As shown in FIG. 5, the housing 30 is configured in the shape of a rectangular flat plate. A plurality of contact accommodating rows 62 are formed in the housing 30. The plurality of contact accommodating rows 62 extend parallel to one another. Each contact accommodating row 62 extends linearly along the pitch direction. The plurality of contact accommodating rows 62 are aligned in the width direction. Each contact accommodating row 62 includes a plurality of contact accommodating portions 63.

[0030] Fig. 6 shows a partially cutaway perspective view of connector 3, in which housing 30 is cut along a plane perpendicular to the pitch direction. Fig. 7 shows a partially cutaway perspective view of connector 3, in which housing 30 is cut along a plane perpendicular to the pitch direction and a plane perpendicular to the width direction. Fig. 8 shows a partially cutaway perspective view of connector 3, in which housing 30 is cut along a plane perpendicular to the pitch direction. Fig. 9 shows a cross-sectional view of connector 3, in which housing 30 is cut along a plane perpendicular to the pitch direction.

[0031] 6 and 7, the plurality of contact accommodating rows 62 accommodate the plurality of contact rows 31, respectively. That is, the plurality of contact accommodating sections 63 accommodate the plurality of contacts 33, respectively. Each contact accommodating section 63 is formed to attach each contact 33 to the housing 30. As shown in FIG. 8, each contact accommodating section 63 is formed to penetrate the housing 30 in the up-down direction.

[0032] 8 and 9, each contact accommodating portion 63 includes a contact accommodating portion main body 70 and a solder connection check hole 71. The contact accommodating portion main body 70 and the solder connection check hole 71 are formed apart from each other in the width direction. The contact accommodating portion main body 70 and the solder connection check hole 71 are both through holes that pass through the housing 30 in the vertical direction.

[0033] The housing 30 has a widthwise partition wall 72 that separates the contact accommodating portion main body 70 and the solder connection check hole 71 of the contact accommodating portion 63 in the width direction. A notch 73 is formed at the lower end of the widthwise partition wall 72.

[0034] The housing 30 has a pitch partition wall 74 that separates, in the pitch direction, the contact accommodating portion bodies 70 of two contact accommodating portions 63 that are adjacent in the pitch direction. A restriction wall 75 that protrudes in the pitch direction is formed at the upper end of the pitch partition wall 74.

[0035] Next, each contact 33 will be described in detail with reference to Figures 10 to 12. In this embodiment, all of the contacts 33 have the same shape. However, instead of this, contacts 33 of different shapes may be mixed.

[0036] 10 and 11 show perspective views of each contact 33. FIG.

[0037] As shown in FIGS. 10 to 12, each contact 33 includes a fixed portion 80, a soldering portion 81, and an elastically deformable portion .

[0038] The fixed portion 80 is a portion that is press-fitted into the contact accommodating body 70 shown in FIG. 8. That is, by press-fitting the fixed portion 80 into the contact accommodating body 70, each contact 33 is held in the housing 30. The fixed portion 80 is a plate whose thickness direction coincides with its width direction. The fixed portion 80 includes a fixed portion main body 80A and two press-fit claws 80B. The two press-fit claws 80B are formed to protrude in the pitch direction from both ends of the fixed portion main body 80A in the pitch direction.

[0039] The soldering portion 81 and the elastic deformation portion 82 are arranged on opposite sides in the width direction with the fixed portion 80 in between. Hereinafter, the direction in which the elastic deformation portion 82 is viewed from the soldering portion 81 will be referred to as the front, and the direction in which the soldering portion 81 is viewed from the elastic deformation portion 82 will be referred to as the rear. Therefore, the elastic deformation portion 82 is arranged in front of the fixed portion 80, and the soldering portion 81 is arranged behind the fixed portion 80.

[0040] The soldering portion 81 includes a soldering portion main body 81A and a posture-stabilizing spring piece 81B. The soldering portion main body 81A is the portion that is soldered to the corresponding signal pad 15 of the input / output board 4 shown in FIG. 1. As shown in FIG. 10, the soldering portion main body 81A extends rearward from the lower end of the fixing portion 80. The posture-stabilizing spring piece 81B protrudes upward from the rear end of the soldering portion main body 81A.

[0041] The elastic deformation portion 82 is a portion that functions as an electrical contact with the corresponding signal pad 10 of the CPU board 2 shown in Fig. 2. As shown in Fig. 10, the elastic deformation portion 82 includes a curved connecting portion 83, a U-shaped curved portion 84, an upper contact portion 85 (first contact portion), a displacement regulating portion 86, and a lower contact portion 87 (second contact portion). The curved connecting portion 83, the U-shaped curved portion 84, the upper contact portion 85, and the displacement regulating portion 86 are connected in this order.

[0042] The curved connecting portion 83 includes a connecting portion main body 83A and a vertical portion 83B. The connecting portion main body 83A protrudes forward from the upper end of the fixing portion 80 and is curved in a U shape so that it is convex upward and opens downward. The vertical portion 83B protrudes downward from the tip of the connecting portion main body 83A.

[0043] When the U-shaped curved portion 84 is observed from a line of sight along the pitch direction, the U-shaped curved portion 84 includes a lower straight portion 84A, a curved portion 84B, and an upper straight portion 84C. The lower straight portion 84A, the curved portion 84B, and the upper straight portion 84C are connected in this order.

[0044] The lower straight portion 84A extends forward from the lower end of the vertical portion 83B of the curved connecting portion 83 so as to be parallel to the width direction. The curved portion 84B protrudes upward from the front end of the lower straight portion 84A and is curved so as to be convex forward and open rearward. The upper straight portion 84C protrudes rearward from the upper end of the curved portion 84B and is slightly inclined upward. Therefore, when the U-shaped curved portion 84 is observed from a line of sight along the pitch direction, it forms a roughly U-shape that opens rearward.

[0045] As shown in FIG. 11 , the U-shaped curved portion 84 is formed to have two spring pieces whose ends are connected. That is, the U-shaped curved portion 84 includes two spring pieces 90 extending along the U-shaped curved portion 84, a fixed portion-side connecting portion 91 that connects the two spring pieces 90 on the fixed portion 80 side, and an upper contact portion-side connecting portion 92 that connects the two spring pieces 90 on the upper contact portion 85 side. The two spring pieces 90 face each other in the pitch direction and are spaced apart from each other in the pitch direction. The two spring pieces 90 extend parallel to each other. The fixed portion-side connecting portion 91 is located on the vertical portion 83B of the curved connecting portion 83. The upper contact portion-side connecting portion 92 is located on the upper straight portion 84C. Therefore, the two spring pieces 90 are formed from the lower straight portion 84A to the upper straight portion 84C. In other words, the slit 93 defined by the two spring pieces 90, the fixed portion side connecting portion 91, and the upper contact portion side connecting portion 92 is formed from the lower straight portion 84A to the upper straight portion 84C.

[0046] The upper contact portion 85 is a portion that can make electrical contact with the corresponding signal pad 10 of the CPU board 2 shown in Fig. 2. As shown in Fig. 11, the upper contact portion 85 is provided at the tip of the upper straight portion 84C of the U-shaped curved portion 84, and is curved in a U shape that is convex upward and opens downward.

[0047] As shown in FIG. 10, the displacement restriction portion 86 includes two restriction pieces 86A that protrude from the distal end of the upper contact portion 85 in opposite directions in the pitch direction.

[0048] 10 and 11, the lower contact portion 87 is disposed between two spring pieces 90 in the pitch direction in a plan view. As shown in Fig. 11, the lower contact portion 87 is a cantilever extending forward from the vertical portion 83B of the curved connecting portion 83 and inclined downward. In other words, the lower contact portion 87 extends in a cantilever shape in a direction away from the fixed portion 80.

[0049] As shown in FIG. 12, each contact 33 is formed symmetrically with respect to a bisecting line 33D that divides each contact 33 in half in the pitch direction.

[0050] 9 shows the state in which each contact 33 is attached to each contact accommodating section 63. To attach each contact 33 to each contact accommodating section 63, each contact 33 is press-fitted from below into the contact accommodating section main body 70 of the corresponding contact accommodating section 63. That is, the two press-fitting claws 80B of the fixing section 80 are respectively engaged with the wall surfaces of the two pitch partition walls 74 that divide the contact accommodating section main body 70 in the width direction. As a result, the elastic deformation section 82 is housed in the contact accommodating section main body 70, the posture-stabilizing spring piece 81B of the soldering section 81 is housed in the solder connection confirmation hole 71, and the soldering section main body 81A of the soldering section 81 is housed in the notch 73.

[0051] During the press-fitting, the two restriction pieces 86A of the displacement restriction portion 86 come into contact with the lower surfaces of the corresponding restriction walls 75, causing the U-shaped curved portion 84 to be slightly elastically deformed so that the U-shaped curved portion 84 is compressed in the vertical direction. That is, the elastically deforming portion 82 is accommodated in the contact accommodating body 70 with the U-shaped curved portion 84 in a state where it is slightly elastically deformed. This improves the coplanarity between the upper contact portions 85 of the multiple contacts 33.

[0052] Furthermore, during the press-fitting, the width partition wall 72 is inserted between the fixed portion 80 and the posture-stabilizing spring piece 81B of the soldered portion 81, causing the soldered portion 81 to elastically deform so that the posture-stabilizing spring piece 81B moves away from the fixed portion 80 in the width direction. Then, in the press-fitted state, the posture-stabilizing spring piece 81B is pressed against the width partition wall 72 by the elastic restoring force of the soldered portion 81. In other words, the fixed portion 80 and the soldered portion 81 elastically sandwich the width partition wall 72 in the width direction. This stabilizes the posture of each contact 33 after the press-fitting.

[0053] Fig. 13 shows the connector 3 mounted on the connector-facing surface 4A of the input / output board 4. As shown in Fig. 13, a short-circuit pad 16 (a second board-side conductor) is formed near a signal pad 15 (a first board-side conductor) on the connector-facing surface 4A of the input / output board 4. The signal pad 15 and the short-circuit pad 16 are connected by a connecting pattern 17. This allows the signal pad 15 and the short-circuit pad 16 to have the same potential. However, instead of this, the signal pad 15 and the short-circuit pad 16 may be connected to each other without the connecting pattern 17 and provided as a single pad.

[0054] The signal pads 15 and the short-circuit pads 16 have the same thickness and are provided on the connector-facing surface 4A of the input / output board 4. The signal pads 15 are arranged below the soldering portion main body 81A of the soldering portion 81, and the short-circuit pads 16 are arranged below the lower contact portions 87. As described above, when the connector 3 is mounted on the connector-facing surface 4A of the input / output board 4, the tip 87A of the lower contact portion 87 faces the short-circuit pad 16 in the vertical direction but does not come into contact with the short-circuit pad 16.

[0055] 13, when the soldering portion body 81A of the soldering portion 81 is soldered to the corresponding signal pad 15, a solder fillet F is formed between the soldering portion body 81A of the soldering portion 81 and the signal pad 15. In this embodiment, the solder fillet F can be confirmed from above through the solder connection confirmation hole 71. This makes it possible to confirm whether the soldering of each contact 33 was successful or not after the connector 3 is mounted on the input / output board 4.

[0056] 1, when the CPU board 2 is fixed to the support board 5, the upper contact portions 85 come into contact with the corresponding signal pads 10 (see also FIG. 2) of the CPU board 2 and are pushed downward, as shown by the two-dot chain lines in FIG. 13. When the upper contact portions 85 are pushed downward, the tops of the upper contact portions 85 become aligned in the up-down direction with the CPU board-facing surface 30A of the housing 30. At this time, the amount of vertical displacement of the upper contact portions 85 is the same for all of the contacts 33.

[0057] When the upper contact portion 85 is elastically displaced downward as described above, in the early stage of the displacement, the tip 87A of the lower contact portion 87 approaches the corresponding shorting pad 16, but maintains a state where the tip 87A of the lower contact portion 87 is not in contact with the shorting pad 16. In the middle stage of the displacement, the tip 87A of the lower contact portion 87 comes into contact with the shorting pad 16. In the later stage of the displacement, the upper contact portion 85 is further elastically displaced downward while the elastic deformation portion 82 is elastically deforming, while maintaining a state where the tip 87A of the lower contact portion 87 is in contact with the shorting pad 16, and when the upper contact portion 85 is displaced to the position indicated by the two-dot chain line, the upper contact portion 85 comes to rest without further displacing downward.

[0058] Therefore, the current path from the upper contact portion 85 to the signal pad 15 at the initial stage of displacement passes through the upper contact portion 85 of the elastically deforming portion 82, the U-shaped curved portion 84 of the elastically deforming portion 82, the curved connecting portion 83 of the elastically deforming portion 82, the fixed portion 80, the soldering portion main body 81A of the soldering portion 81, and the signal pad 15 in that order. At the initial stage of displacement, the tip 87A of the lower contact portion 87 is not in contact with the short-circuit pad 16, so the springiness of the elastically deforming portion 82 does not become stiff. Therefore, the connection reliability between the contact 33 and the corresponding signal pad 10 (see also FIG. 2) is not impaired.

[0059] In contrast, the current path from the upper contact portion 85 to the signal pad 15 in the middle or later stage of displacement passes in this order through the upper contact portion 85 of the elastically deforming portion 82, the U-shaped curved portion 84 of the elastically deforming portion 82, the lower contact portion 87 of the elastically deforming portion 82, the short-circuit pad 16, and the signal pad 15. In this way, the current path length in the contact 33 is effectively shortened in the middle or later stage of displacement, so that the resistance value in the contact 33 in the middle or later stage of displacement can be reduced.

[0060] When the CPU board 2 is removed from the support board 5, the upper contact portion 85 is elastically displaced upward due to the elastic restoring force of the elastic deformation portion 82, and eventually, when the two regulating pieces 86A of the displacement regulating portion 86 reach the underside of the regulating wall 75, further elastic displacement is regulated and the state returns to the state shown by the solid line in Figure 13.

[0061] The first embodiment of the present invention has been described above. The above embodiment has the following features.

[0062] 1, 2, 9, and 13, the connector 3 (electrical connector) includes a housing 30 and a plurality of contacts 33 held in the housing 30. The plurality of contacts 33 electrically connect a plurality of signal pads 10 (connection object-side conductors) provided on the CPU board 2 (connection object) with a plurality of signal pads 15 (board-side conductors) provided on the input / output board 4 (board). The plurality of contacts 33 includes at least one contact 33 (first contact) configured as follows. In other words, at least one or more of the plurality of contacts 33 provided in the connector 3 have the following characteristics.

[0063] That is, the contact 33 includes a fixed portion 80 fixed to the housing 30, a soldering portion 81 soldered to a corresponding signal pad 15 (first board-side conductor) among the multiple signal pads 15, and a cantilever-shaped elastically deforming portion 82 extending from the fixed portion 80. The elastically deforming portion 82 includes an upper contact portion 85 (first contact portion) capable of contacting a corresponding signal pad 10 (first connection-object-side conductor) among the multiple signal pads 10, and a lower contact portion 87 (second contact portion) capable of contacting a short-circuit pad 16 (second board-side conductor) provided on the input / output board 4 and set to the same potential as the signal pad 15. The contact 33 is configured such that when the upper contact portion 85 is separated from the signal pad 10, the lower contact portion 87 is separated from the short-circuit pad 16, and when the upper contact portion 85 comes into contact with the signal pad 10 and the elastically deformed portion 82 elastically deforms, the lower contact portion 87 comes into contact with the short-circuit pad 16. The current path length from the upper contact portion 85 to the lower contact portion 87 is shorter than the current path length from the upper contact portion 85 to the soldering portion 81. In other words, the current path from the upper contact portion 85 to the signal pad 15 is shortened by passing through the lower contact portion 87. With the above configuration, the current path length can be shortened without impairing the connection reliability of the contact 33.

[0064] Furthermore, in this embodiment, all of the contacts 33 are configured so that when the upper contact portion 85 is away from the signal pad 10, the lower contact portion 87 is away from the short-circuit pad 16. Therefore, sufficient coplanarity of the soldering portions 81 of all of the contacts 33 is ensured, and during reflow, the soldering portions 81 of all of the contacts 33 can make contact with all of the signal pads 15 without any problems, so the presence of the lower contact portion 87 does not affect the success or failure of reflow.

[0065] 10 and 11, the elastic deformation portion 82 is configured such that two spring pieces 90, which extend parallel to each other and are spaced apart from each other in the pitch direction and have both ends connected, are interposed between the upper contact portion 85 and the fixed portion 80. The lower contact portion 87 is disposed between the two spring pieces 90 in the pitch direction. With this configuration, the lower contact portion 87 is difficult to touch, so the lower contact portion 87 will not be accidentally broken when handling the contact 33.

[0066] The lower contact portion 87 extends in a cantilever shape in a direction away from the fixed portion 80. With the above configuration, the beam length of the lower contact portion 87 can be ensured to be large, so that the lower contact portion 87 itself can have sufficient spring properties. This contributes to high connection reliability between the lower contact portion 87 and the short-circuit pad 16.

[0067] The insertion loss of a transmission signal in a differential transmission connector generally exhibits frequency characteristics that increase as the frequency of the transmission signal increases. A localized increase in insertion loss, called a spike phenomenon, can occur in the waveform representing this frequency characteristic. If this spike occurs at a relatively low frequency, the product requirements for the frequency characteristics of insertion loss cannot be met. While the product requirements for the frequency characteristics of insertion loss are determined within a specific frequency range, the occurrence of the spike phenomenon at frequencies higher than that frequency range is not particularly problematic. A known method for shifting the spike phenomenon toward higher frequencies is to shorten the current path length in the ground contact. However, shortening the current path length of the contact stiffens the springiness of the contact, resulting in poor connection reliability. In other words, there is a problem in which differential transmission connectors cannot achieve both high-frequency transmission characteristics and connection reliability.

[0068] In contrast, the contact 33 of this embodiment has the characteristic of being able to shorten the current path length while maintaining a certain degree of springiness, as described above. Therefore, by using this contact 33 as a ground contact, it is possible to achieve both high-frequency transmission characteristics and connection reliability in a differential transmission connector.

[0069] That is, the plurality of contacts 33 include differential transmission signal contacts and ground contacts. The first contact, characterized by having a lower contact portion 87, is employed at least as a ground contact.

[0070] Of the multiple contacts 33 provided in the connector 3, only the ground contact may be a contact 33 having a lower contact portion 87 as shown in Figure 10, or all of the contacts 33 provided in the connector 3 may be contacts 33 having a lower contact portion 87 as shown in Figure 10.

[0071] 13 includes an input / output board 4 and a connector 3 mounted on the input / output board 4. The board assembly E has the connector 3 mounted on the input / output board 4. With the above configuration, the board assembly E is realized, which can shorten the current path length in the contact 33 without impairing the connection reliability of the contact 33.

[0072] (Second embodiment) Next, a second embodiment will be described with reference to Fig. 14. The following description will focus on the differences between this embodiment and the first embodiment, and redundant explanations will be omitted. Fig. 14 shows the connector 3 mounted on the connector-facing surface 4A of the input / output board 4.

[0073] 13, in the first embodiment, the contact 33 has a lower contact portion 87 that can come into contact with the short-circuit pad 16. In the first embodiment, as shown in FIG.

[0074] In contrast, as shown in FIG. 14, in this embodiment, the contact 33 does not have a lower contact portion 87, but is configured so that the lower straight portion 84A of the U-shaped curved portion 84 of the elastic deformation portion 82 of the contact 33 is inclined downward as it moves forward.

[0075] 14, the short-circuit pad 16 is disposed below the curved portion 84B. As described above, when the connector 3 is mounted on the connector-facing surface 4A of the input / output board 4, the curved portion 84B faces the short-circuit pad 16 in the vertical direction but does not make contact with the short-circuit pad 16.

[0076] 1, when the CPU board 2 is fixed to the support board 5, the upper contact portions 85 come into contact with the corresponding signal pads 10 (see also FIG. 2) of the CPU board 2 and are pushed downward, as shown by the two-dot chain lines in FIG. 14. When the upper contact portions 85 are pushed downward, the tops of the upper contact portions 85 become aligned in the vertical direction with the CPU board-facing surface 30A of the housing 30. At this time, the amount of vertical displacement of the upper contact portions 85 is the same for all of the contacts 33.

[0077] When the upper contact portion 85 is elastically displaced downward as described above, in the early stage of the displacement, the curved portion 84B of the U-shaped curved portion 84 approaches the corresponding short-circuiting pad 16, but maintains a state where it is not in contact with the short-circuiting pad 16. In the middle stage of the displacement, the curved portion 84B of the U-shaped curved portion 84 comes into contact with the short-circuiting pad 16. In the later stage of the displacement, the upper contact portion 85 is further elastically displaced downward while the elastic deformation portion 82 is elastically deforming while maintaining a state where the curved portion 84B of the U-shaped curved portion 84 is in contact with the short-circuiting pad 16, and when the upper contact portion 85 is displaced to the position indicated by the two-dot chain line, the upper contact portion 85 comes to rest without further displacing downward.

[0078] Therefore, the current path from the upper contact portion 85 to the signal pad 15 at the initial stage of displacement passes through the upper contact portion 85 of the elastically deforming portion 82, the U-shaped curved portion 84 of the elastically deforming portion 82, the curved connecting portion 83 of the elastically deforming portion 82, the fixed portion 80, the soldering portion main body 81A of the soldering portion 81, and the signal pad 15 in that order. At the initial stage of displacement, the curved portion 84B of the U-shaped curved portion 84 is not in contact with the short-circuit pad 16, so the springiness of the elastically deforming portion 82 does not become stiff. Therefore, the connection reliability between the contact 33 and the corresponding signal pad 10 (see also FIG. 2) is not impaired.

[0079] In contrast, the current path from the upper contact portion 85 to the signal pad 15 in the middle or later stage of displacement passes through the upper contact portion 85 of the elastically deforming portion 82, the curved portion 84B of the U-shaped curved portion 84 of the elastically deforming portion 82, the short-circuit pad 16, and the signal pad 15 in that order. In this way, the current path length in the contact 33 is effectively shortened in the middle or later stage of displacement, so that the resistance value in the contact 33 in the middle or later stage of displacement can be reduced.

[0080] The second embodiment has been described above, and the above embodiment has the following features.

[0081] 14, the elastic deformation portion 82 is configured such that a U-shaped curved portion 84 is interposed between the upper contact portion 85 (first contact portion) and the fixed portion 80. The curved portion 84B serving as the second contact portion is a part of the U-shaped curved portion 84. With the above-described configuration, the current path length can be shortened with a simple configuration without impairing the connection reliability of the contact 33.

[0082] The U-shaped curved portion 84 includes, in this order from the fixed portion 80 toward the upper contact portion 85, a lower straight portion 84A (the straight portion on the fixed portion side), a curved portion 84B, and an upper straight portion 84C (the straight portion on the first contact portion side). The curved portion 84B functions as the second contact portion. With the above configuration, the curved portion 84B can function as a contact point for the short-circuit pad 16.

[0083] (Third embodiment) Next, a third embodiment will be described with reference to Figures 15 and 16. The following description will focus on the differences between this embodiment and the first embodiment, and redundant explanations will be omitted. Figure 15 shows a perspective view of the contacts 33. Figure 16 shows the connector 3 mounted on the connector-facing surface 4A of the input / output board 4.

[0084] 13, in the first embodiment, the contact 33 has a lower contact portion 87 that can come into contact with the short-circuit pad 16. In the first embodiment, as shown in FIG.

[0085] 15 and 16, in this embodiment, the contact 33 has a downward extension spring piece 88 (second contact portion) instead of the lower contact portion 87. The downward extension spring piece 88 is a part of the elastic deformation portion 82.

[0086] The downward extension spring piece 88 extends in a cantilevered manner downward from the tip of the upper contact portion 85. That is, the downward extension spring piece 88 extends in a cantilevered manner from the tip of the upper contact portion 85 toward the input / output board 4. As shown in FIG. 16 , the downward extension spring piece 88 includes a first extension portion 88A, a bent portion 88B, and a second extension portion 88C. The first extension portion 88A, the bent portion 88B, and the second extension portion 88C are connected in this order.

[0087] The first extension portion 88A extends in a straight line downward from the tip of the upper contact portion 85. Specifically, the first extension portion 88A extends downward from the tip of the upper contact portion 85 and is inclined forward.

[0088] The bent portion 88B is provided at the lower end of the tip of the first extension portion 88A, and is bent in a V shape so as to be convex downward.

[0089] The second extension portion 88C extends in a straight line upward from the tip of the bent portion 88B. Specifically, the second extension portion 88C extends upward from the tip of the bent portion 88B and is inclined forward.

[0090] Therefore, the downward extension spring piece 88 is formed in a generally V-shape when viewed in the pitch direction.

[0091] 16, the short-circuit pad 16 is disposed below the bent portion 88B. As described above, when the connector 3 is mounted on the connector-facing surface 4A of the input / output board 4, the bent portion 88B of the downward extension spring piece 88 faces the short-circuit pad 16 in the vertical direction but does not come into contact with the short-circuit pad 16.

[0092] 1, when the CPU board 2 is fixed to the support board 5, the upper contact portions 85 come into contact with the corresponding signal pads 10 (see also FIG. 2) of the CPU board 2 and are pushed downward, as shown by the two-dot chain lines in FIG. 16. When the upper contact portions 85 are pushed downward, the tops of the upper contact portions 85 become aligned in the vertical direction with the CPU board-facing surface 30A of the housing 30. At this time, the amount of vertical displacement of the upper contact portions 85 is the same for all of the contacts 33.

[0093] When the upper contact portion 85 is elastically displaced downward as described above, in the early stage of the displacement, the bent portion 88B of the downward extension spring piece 88 approaches the corresponding shorting pad 16, but maintains a state in which it is not in contact with the shorting pad 16. In the middle stage of the displacement, the bent portion 88B of the downward extension spring piece 88 comes into contact with the shorting pad 16. In the later stage of the displacement, the upper contact portion 85 is further elastically displaced downward while the elastic deformation portion 82 is elastically deforming while maintaining a state in which the bent portion 88B of the downward extension spring piece 88 is in contact with the shorting pad 16, and when the upper contact portion 85 is displaced to the position indicated by the two-dot chain line, the upper contact portion 85 comes to rest without further displacing downward.

[0094] Therefore, the current path from the upper contact portion 85 to the signal pad 15 at the initial stage of displacement passes through the upper contact portion 85 of the elastically deforming portion 82, the U-shaped curved portion 84 of the elastically deforming portion 82, the curved connecting portion 83 of the elastically deforming portion 82, the fixed portion 80, the soldering portion main body 81A of the soldering portion 81, and the signal pad 15 in that order. At the initial stage of displacement, the bent portion 88B of the downward extension spring piece 88 is not in contact with the short-circuit pad 16, so the springiness of the elastically deforming portion 82 does not become stiff. Therefore, the connection reliability between the contact 33 and the corresponding signal pad 10 (see also FIG. 2) is not impaired.

[0095] In contrast, the current path from the upper contact portion 85 to the signal pad 15 in the middle or later stage of displacement passes through the upper contact portion 85 of the elastic deformation portion 82, the first extension portion 88A of the downward extension spring piece 88, the bent portion 88B of the downward extension spring piece 88, the short-circuit pad 16, and the signal pad 15 in that order. In this way, the current path length in the contact 33 is effectively shortened in the middle or later stage of displacement, so that the resistance value in the contact 33 in the middle or later stage of displacement can be reduced.

[0096] In the later stage of displacement, the bent portion 88B of the downward extension spring piece 88 slides forward on the shorting pad 16. Therefore, the contact resistance between the bent portion 88B of the downward extension spring piece 88 and the shorting pad 16 is improved by wiping.

[0097] The third embodiment has been described above, and the above embodiment has the following features.

[0098] 16, the elastic deformation portion 82 is configured such that a U-shaped bent portion 84 is interposed between an upper contact portion 85 (first contact portion) and the fixed portion 80. The downward extension spring piece 88 (second contact portion) extends in a cantilever manner from the upper contact portion 85 toward the input / output board 4 (substrate). According to the above configuration, when the bent portion 88B of the downward extension spring piece 88 is in contact with the short-circuit pad 16, the U-shaped bent portion 84 is not included in the current path from the upper contact portion 85 to the signal pad 15, and therefore the length of the current path can be made extremely short.

[0099] As shown in FIG. 16, the U-shaped curved portion 84, the upper contact portion 85, and the downward extension spring piece 88 are connected in this order.

[0100] (Fourth embodiment) Next, a fourth embodiment will be described with reference to Figures 17 and 18. The following description will focus on the differences between this embodiment and the first embodiment, and redundant explanations will be omitted. Figure 17 shows a perspective view of the contacts 33. Figure 18 shows the connector 3 mounted on the connector-facing surface 4A of the input / output board 4.

[0101] 13, in the first embodiment, the contact 33 has a lower contact portion 87 that can come into contact with the short-circuit pad 16. In the first embodiment, as shown in FIG.

[0102] 17 and 18, in this embodiment, the contact 33 has a downward protruding portion 95 (second contact portion) and a horizontal protruding portion 96 (third contact portion) instead of the lower contact portion 87. The downward protruding portion 95 and the horizontal protruding portion 96 are both part of the elastic deformation portion 82.

[0103] The downward protrusion 95 extends downward in a cantilevered and straight manner from the tip of the upper contact portion 85. That is, the downward protrusion 95 extends in a cantilevered manner from the tip of the upper contact portion 85 toward the input / output board 4. In other words, the downward protrusion 95 protrudes downward from the tip of the upper contact portion 85.

[0104] The horizontal protrusion 96 is formed so as to protrude in a cantilever-like manner in the width direction from the vertical portion 83B of the curved connecting portion 83. That is, the horizontal protrusion 96 protrudes forward from the vertical portion 83B of the curved connecting portion 83. The horizontal protrusion 96 is disposed between the two spring pieces 90 in the pitch direction in a plan view. The horizontal protrusion 96 is disposed above the lower straight portion 84A of the U-shaped curved portion 84 in a side view. As shown in FIG. 18 , the downward protrusion 95 and the horizontal protrusion 96 face each other in the up-down direction. That is, the horizontal protrusion 96 is disposed below the downward protrusion 95. As described above, when the connector 3 is mounted on the connector-facing surface 4A of the input / output board 4, the downward protrusion 95 faces the horizontal protrusion 96 in the up-down direction but does not contact the horizontal protrusion 96.

[0105] 1, when the CPU board 2 is fixed to the support board 5, the upper contact portions 85 come into contact with the corresponding signal pads 10 (see also FIG. 2) of the CPU board 2 and are pushed downward, as shown by the two-dot chain lines in FIG. 18. When the upper contact portions 85 are pushed downward, the tops of the upper contact portions 85 become aligned in the up-down direction with the CPU board-facing surface 30A of the housing 30. At this time, the amount of vertical displacement of the upper contact portions 85 is the same for all of the contacts 33.

[0106] As described above, when the upper contact portion 85 is elastically displaced downward, in the early stage of the displacement, the downward protrusion 95 approaches the horizontal protrusion 96 but maintains a state where it is not in contact with the horizontal protrusion 96. In the middle stage of the displacement, the downward protrusion 95 comes into contact with the horizontal protrusion 96. In the later stage of the displacement, the upper contact portion 85 is further elastically displaced downward while maintaining a state where the downward protrusion 95 is in contact with the horizontal protrusion 96, accompanied by elastic deformation of the curved connecting portion 83 and the horizontal protrusion 96, and when the upper contact portion 85 is displaced to the position indicated by the two-dot chain line, the upper contact portion 85 comes to rest without further displacing downward.

[0107] Therefore, the current path from the upper contact portion 85 to the signal pad 15 at the initial stage of displacement passes through the upper contact portion 85 of the elastically deforming portion 82, the U-shaped curved portion 84 of the elastically deforming portion 82, the curved connecting portion 83 of the elastically deforming portion 82, the fixed portion 80, the soldering portion main body 81A of the soldering portion 81, and the signal pad 15 in that order. Since the downward protrusion 95 is not in contact with the horizontal protrusion 96 at the initial stage of displacement, the springiness of the elastically deforming portion 82 does not become stiff. Therefore, the connection reliability between the contact 33 and the corresponding signal pad 10 (see also FIG. 2) is not impaired.

[0108] In contrast, the current path from the upper contact portion 85 to the signal pad 15 in the middle or later stage of displacement passes through the upper contact portion 85 of the elastic deformation portion 82, the downward protrusion 95, the horizontal protrusion 96, the curved connecting portion 83, the fixed portion 80, the soldering portion 81, and the signal pad 15 in that order. In this way, the current path length in the contact 33 is effectively shortened in the middle or later stage of displacement, so that the resistance value in the contact 33 in the middle or later stage of displacement can be reduced.

[0109] The fourth embodiment has been described above, and the above embodiment has the following features.

[0110] That is, the elastic deformation portion 82 is configured such that the U-shaped bent portion 84 is interposed between the upper contact portion 85 (first contact portion) and the fixed portion 80. The downward protrusion 95 (second contact portion) extends in a cantilever manner from the upper contact portion 85 toward the input / output board 4 (substrate). The elastic deformation portion 82 further includes a horizontal protrusion 96 (third contact portion). The downward protrusion 95 is configured to be able to contact the horizontal protrusion 96, instead of being able to contact the short-circuit pad 16 as shown in FIG. 16 . The contact 33 is configured such that when the upper contact portion 85 is separated from the signal pad 10 (first connection object-side conductor), the downward protrusion 95 is separated from the horizontal protrusion 96, and when the upper contact portion 85 comes into contact with the signal pad 10 and the elastic deformation portion 82 is elastically deformed, the downward protrusion 95 comes into contact with the horizontal protrusion 96. The length of the current path from the upper contact portion 85 to the soldering portion 81 via the downward protruding portion 95 and the horizontal protruding portion 96 is shorter than the length of the current path from the upper contact portion 85 to the soldering portion 81 via the U-shaped curved portion 84. With the above configuration, the current path length can be shortened without impairing the connection reliability of the contact 33.

[0111] 17, the U-shaped curved portion 84 includes two spring pieces 90 that extend parallel to each other and are spaced apart in the pitch direction, and have both ends connected. The horizontal protrusion 96 protrudes in a cantilevered manner between the two spring pieces 90 in the pitch direction in a plan view. With this configuration, the horizontal protrusion 96 is difficult to touch, so the horizontal protrusion 96 will not be accidentally broken when handling the contact 33.

[0112] The first to fourth embodiments of the present invention have been described above, but each embodiment can be modified, for example, as follows.

[0113] 1, in the above embodiment, the connector 3 is a board-to-board connector that connects the CPU board 2 and the input / output board 4, but is not limited to this. The connector 3 may be a cable-to-board connector or a cable-to-cable connector. [Explanation of symbols]

[0114] 1. Information processing equipment (electronic devices) 2 CPU board (connection object) 2A connector facing surface 3 Connectors (electrical connectors) 4 Input / Output Board (PCB) 4A Connector facing surface 5 Support Board 6 signal pad row 8 Bolt fastening holes 8A First bolt fastening hole 8B Second bolt fastening hole 8C 3rd bolt fastening hole 10 signal pad (connection object side conductor, first connection object side conductor) 11 Signal pad row 12 Hold Down Pads 13 Bolt fastening holes 13A First bolt fastening hole 13B Second bolt fastening hole 13C 3rd bolt fastening hole 15 Signal pad (substrate side conductor, first substrate side conductor) 16 Shorting pad (second board side conductor) 17 Connecting Patterns 20 Board body 21 Nut 21A First Nut 21B Second nut 21C 3rd nut 30 Housing 30A CPU board facing side 30B Input / output board facing side 31 Contact Row 32 Hold Down 33 Contact (First Contact) 33D Bisector 40A 1st bolt 40B Second bolt 40C 3rd bolt 62 Contact Lens Queue 63 Contact housing 70 Contact housing body 71 Solder connection confirmation hole 72-Wide Partition Wall 73 Cutout 74 Pitch Partition Wall 75 Regulatory barriers 80 Fixed part 80A Fixed part body 80B press-fit jaws 81 Soldering section 81A Soldering part body 81B Posture stabilizing spring piece 82 Elastic deformation part 83 Curved joint 83A Connection body 83B Vertical section 84 U-shaped curve 84A Lower straight section (fixed section side straight section) 84B Curved section (second contact section) 84C Upper straight section (first contact side straight section) 85 Upper contact part (1st contact part) 86 Displacement control section 86A Regulatory piece 87 Lower contact part (second contact part) 87A Tip 88 Downward extension spring piece (second contact part) 88A 1st extension 88B Bent part 88C 2nd extension 90 Spring piece 91 Fixed part side connection part 92 Upper contact side connection part 93 Slit 95 Downward protrusion (second contact part) 96 Horizontal protrusion (3rd contact part) E Board Assembly F Solder fillet

Claims

1. Housing and a plurality of contacts held in the housing; Equipped with the plurality of contacts electrically connect a plurality of connection object-side conductors provided on the connection object and a plurality of board-side conductors provided on the board, respectively; 1. An electrical connector comprising: the plurality of contacts includes a first contact; The first contact comprises: a fixing portion fixed to the housing; a soldering portion to be soldered to a first board-side conductor as a corresponding board-side conductor among the plurality of board-side conductors; a cantilever-shaped elastic deformation portion extending from the fixed portion; Including, The elastic deformation portion is a first contact portion capable of coming into contact with a first connection-object-side conductor as a corresponding connection-object-side conductor among the plurality of connection-object-side conductors; a second contact portion that is an electrode pad provided on the substrate and can come into contact with a second substrate-side conductor that has the same potential as the first substrate-side conductor; Including, the first contact is configured such that when the first contact portion is spaced apart from the first connection object-side conductor, the second contact portion is spaced apart from the second board-side conductor, and when the first contact portion comes into contact with the first connection object-side conductor and the elastic deformation portion elastically deforms, the second contact portion comes into contact with the second board-side conductor; a current path length from the first contact portion to the second contact portion is shorter than a current path length from the first contact portion to the soldering portion; the elastic deformation portion is configured such that two spring pieces extending parallel to each other and spaced apart from each other in the pitch direction and having both ends connected to each other are interposed between the first contact portion and the fixed portion; Electrical connector.

2. 2. The electrical connector of claim 1, The second contact portion is disposed between the two spring pieces in the pitch direction. Electrical connector.

3. 2. The electrical connector of claim 1, The second contact portion extends in a cantilever manner in a direction away from the fixed portion. Electrical connector.

4. Housing and a plurality of contacts held in the housing; Equipped with the plurality of contacts electrically connect a plurality of connection object-side conductors provided on the connection object and a plurality of board-side conductors provided on the board, respectively; 1. An electrical connector, comprising: the plurality of contacts includes a first contact; The first contact comprises: a fixing portion fixed to the housing; a soldering portion to be soldered to a first board-side conductor as a corresponding board-side conductor among the plurality of board-side conductors; a cantilever-shaped elastic deformation portion extending from the fixed portion; Including, The elastic deformation portion is a first contact portion capable of coming into contact with a first connection-object-side conductor as a corresponding connection-object-side conductor among the plurality of connection-object-side conductors; a second contact portion provided on the substrate and capable of contacting a second substrate-side conductor having the same potential as the first substrate-side conductor; Including, the first contact is configured such that when the first contact portion is spaced apart from the first connection object-side conductor, the second contact portion is spaced apart from the second board-side conductor, and when the first contact portion comes into contact with the first connection object-side conductor and the elastic deformation portion elastically deforms, the second contact portion comes into contact with the second board-side conductor; a current path length from the first contact portion to the second contact portion is shorter than a current path length from the first contact portion to the soldering portion; the elastic deformation portion is configured such that a U-shaped bent portion that is bent into a U shape is interposed between the first contact portion and the fixed portion, The second contact portion is a part of the U-shaped curved portion. Electrical connector.

5. 5. The electrical connector of claim 4, the U-shaped curved portion includes, in this order from the fixed portion toward the first contact portion, a fixed portion-side straight portion, a curved portion, and a first contact portion-side straight portion, The curved portion functions as the second contact portion. Electrical connector.

6. Housing and a plurality of contacts held in the housing; Equipped with the plurality of contacts electrically connect a plurality of connection object-side conductors provided on the connection object and a plurality of board-side conductors provided on the board, respectively; 1. An electrical connector comprising: the plurality of contacts includes a first contact; The first contact comprises: a fixing portion fixed to the housing; a soldering portion to be soldered to a first board-side conductor as a corresponding board-side conductor among the plurality of board-side conductors; a cantilever-shaped elastic deformation portion extending from the fixed portion; Including, The elastic deformation portion is a first contact portion capable of coming into contact with a first connection-object-side conductor as a corresponding connection-object-side conductor among the plurality of connection-object-side conductors; a second contact portion provided on the substrate and capable of contacting a second substrate-side conductor having the same potential as the first substrate-side conductor; Including, the first contact is configured such that when the first contact portion is spaced apart from the first connection object-side conductor, the second contact portion is spaced apart from the second board-side conductor, and when the first contact portion comes into contact with the first connection object-side conductor and the elastic deformation portion elastically deforms, the second contact portion comes into contact with the second board-side conductor; a current path length from the first contact portion to the second contact portion is shorter than a current path length from the first contact portion to the soldering portion; the elastic deformation portion is configured such that a U-shaped bent portion that is bent into a U shape is interposed between the first contact portion and the fixed portion, the second contact portion extends in a cantilever manner from the first contact portion toward the substrate; Electrical connector.

7. 7. The electrical connector of claim 6, The U-shaped curved portion, the first contact portion, and the second contact portion are connected in this order. Electrical connector.

8. Housing and a plurality of contacts held in the housing; Equipped with the plurality of contacts electrically connect a plurality of connection object-side conductors provided on the connection object and a plurality of board-side conductors provided on the board, respectively; 1. An electrical connector comprising: the plurality of contacts includes a first contact; The first contact comprises: a fixing portion fixed to the housing; a soldering portion to be soldered to a first board-side conductor as a corresponding board-side conductor among the plurality of board-side conductors; a cantilever-shaped elastic deformation portion extending from the fixed portion; Including, The elastic deformation portion is a first contact portion capable of coming into contact with a first connection-object-side conductor as a corresponding connection-object-side conductor among the plurality of connection-object-side conductors; a second contact portion extending in a cantilever manner from the first contact portion toward the substrate; a third contact portion that can come into contact with the second contact portion; a U-shaped curved portion interposed between the first contact portion and the fixed portion and curved in a U-shape; Including, the first contact is configured such that when the first contact portion is separated from the first connection object-side conductor, the second contact portion is separated from the third contact portion, and when the first contact portion comes into contact with the first connection object-side conductor and the elastic deformation portion elastically deforms, the second contact portion comes into contact with the third contact portion, a current path length from the first contact portion to the soldering portion via the second contact portion and the third contact portion is shorter than a current path length from the first contact portion to the soldering portion via the U-shaped bent portion; the U-shaped curved portion includes two spring pieces extending parallel to each other and spaced apart from each other in the pitch direction, and having both ends connected to each other, the third contact portion protrudes in a cantilever shape between the two spring pieces in the pitch direction. Electrical connector.

9. 9. The electrical connector according to claim 1, the plurality of contacts include signal contacts for differential transmission and ground contacts, The first contact is employed as at least the ground contact. Electrical connector.

10. A board assembly comprising the board according to any one of claims 1 to 9 and the electrical connector mounted on the board.

Images