Cable assembly structure and connector

Abstract

To provide a cable assembly and a connector that can prevent leakage or mixing of an electromagnetic wave.SOLUTION: In a cable assembly structure 10, a first cable assembly 1 and a second cable assembly 2 are laminated in a plurality of stages in a direction orthogonal to an extension direction and an arrangement direction of coaxial cables 3 in a state where the extension direction of the coaxial cables 3 of the cable assemblies are aligned and a receptacle connector 30 is seen from leading ends of the coaxial cables. The first cable assembly and the second cable assembly are built in a plug connector 20 to which the receptacle connector 30 is fitted. In the first cable assembly 1 on the first stage, first ground bars 4A, 4B sandwich the coaxial cable 3 at a first position P1 in the gap between the coaxial cable 3 and a shell 24. In the second cable assembly 2, second ground bars 5A, 5B, 6A, 6B sandwich the coaxial cable 3 at a second position P2 in the gap between the coaxial cable 3 and the shell 24 and a third position P3 closer to the leading end than the second position P2.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present invention relates to a cable assembly and a connector. [Background technology]

[0002] Patent Document 1 discloses a connector including a multi-pole coaxial cable connector assembly in which coaxial cable assemblies, each of which is assembled by arranging coaxial cables in a row, are stacked in two stages. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4068092 Summary of the Invention [Problem to be solved by the invention]

[0004] The connector disclosed in the above Patent Document 1 is surrounded on its outer periphery by a shell that is an electromagnetic wave shielding material. However, as shown in FIG. 1 of Patent Document 1, for example, a gap is formed between the end of the second conductive shell 45 and the coaxial cable 2, which raises concerns about leakage or intrusion of electromagnetic waves from this gap.

[0005] The present invention has been made in light of the above circumstances, and an object of the present invention is to provide a cable assembly and a connector that can suppress the leakage or intrusion of electromagnetic waves. [Means for solving the problem]

[0006] In order to achieve the above object, a cable assembly structure according to a first aspect of the present invention comprises: A cable assembly structure comprising a conductive contact and a conductive cover member disposed around the contact, the cable assembly forming a part of a connector that mates with a mating connector, a cable assembly including a plurality of cables arranged in a row with the tip ends of the exposed core wires that come into contact with the contacts aligned, and a pair of conductive ground members that are electrically connected to the cover member and that sandwich the cables at the portions where the outer conductors of the cables are exposed; The cable assembly is stacked in a plurality of stages in a direction perpendicular to the extending direction and the arranging direction of the cables, with the extending directions of the cables aligned and the mating connector visible from the tip end of each cable, and is incorporated into the connector that mates with the mating connector in the stacking direction, In a first cable assembly in a first stage of the cable assemblies closer to the mating connector, a first ground member as one of the pair of ground members sandwiches the cable at a first position in a gap between the cable and the cover member, In a second cable assembly excluding the first cable assembly among the multiple stages of the cable assemblies, a second grounding member as one of the pair of grounding members clamps the cable at a second position in the gap between the cable and the cover member and at a third position closer to the tip end than the second position.

[0007] The second cable assembly is The second ground member may be: a first member for holding the cable at the second position and a second member for holding the cable at the third position; This may also be the case.

[0008] The first ground member and the first member are electrically connected by solder. This may also be the case.

[0009] The first ground member and the first member are electrically connected via the cover member. This may also be the case.

[0010] The second ground member is a member extending from the second position to the third position; This may also be the case.

[0011] The first ground member and the second ground member are electrically connected by solder. This may also be the case.

[0012] The first ground member and the second ground member are electrically connected via the cover member. This may also be the case.

[0013] A connector according to a second aspect of the present invention comprises: The present invention provides a cable assembly structure according to a first aspect. [Effects of the Invention]

[0014] According to the present invention, leakage or intrusion of electromagnetic waves can be suppressed. [Brief explanation of the drawings]

[0015] [Figure 1] 1 is a perspective view showing the appearance of a first cable assembly and a second cable assembly according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view showing the appearance of the connector pair before mating. [Figure 3] FIG. 2 is a perspective view showing the appearance of the plug connector. [Figure 4] 1A is a perspective view showing the appearance of the connector pair after mating, and FIG. 1B is a plan view of the connector pair of FIG. [Figure 5] 4A is a cross-sectional view taken along line VA-VA in FIG. 4B, and FIG. 4B is a cross-sectional view taken along line VB-VB in FIG. [Figure 6] (A) shows the analysis results of EMI (Electro Magnetic Interference) when there is no ground bar between the shell and the coaxial cable, and (B) shows the analysis results of EMI when there is a ground bar between the shell and the coaxial cable. [Figure 7]4A is a cross-sectional view of a connector pair according to a second embodiment of the present invention, taken along line VA-VA in FIG. 4B. FIG. 4B is a cross-sectional view of a connector pair according to a second embodiment of the present invention, taken along line VB-VB in FIG. [Figure 8] 10A and 10B are diagrams illustrating another example of a cable assembly structure. DETAILED DESCRIPTION OF THE INVENTION

[0016] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same or equivalent parts are designated by the same reference numerals.

[0017] Embodiment 1 First, a first embodiment of the present invention will be described. In this first embodiment, a cable assembly 10 (see FIG. 1) including a first cable assembly 1 and a second cable assembly 2 will be described. Next, a plug connector 20 and a receptacle connector 30 including the cable assembly 10 will be described (see FIG. 2). Furthermore, a connector pair 50 (see FIG. 2) including the plug connector 20 and the receptacle connector 30 will be described. The cable assembly 10 provides a structure that suppresses leakage or intrusion of electromagnetic waves between the inside and outside of the connector pair 50.

[0018] [First cable assembly] As shown in Fig. 1, the first cable assembly 1 includes a plurality of coaxial cables 3 and a pair of first ground bars 4A, 4B as first ground members. Fig. 1 shows only a portion of the coaxial cables 3 near one end, and the other portion is not shown.

[0019] [Coaxial cable] The multiple coaxial cables 3 are, for example, cables of the same diameter and type. The multiple coaxial cables 3 are aligned in a row with the same direction. In FIG. 1, the extension direction of the coaxial cables 3 is defined as the X-axis direction, and the arrangement direction of the coaxial cables 3 is defined as the Y-axis direction. Furthermore, the direction perpendicular to both the extension direction and the arrangement direction is defined as the Z-axis direction. The following description will be made with reference to this XYZ-axis Cartesian coordinate system.

[0020] As shown in Fig. 1, the coaxial cable 3 is composed of a core wire 3a extending in the extension direction, a dielectric 3b covering the outer peripheral surface of the core wire 3a extending in the extension direction, an outer conductor 3c covering the outer peripheral surface of the dielectric 3b extending in the extension direction, and an outer jacket 3d covering the outer peripheral surface of the outer conductor 3c extending in the extension direction. The outer conductor 3c is grounded as described below, and the core wire 3a and the outer conductor 3c are insulated by the dielectric 3b. The voltage level of a signal transmitted through the coaxial cable 3 is determined by the potential difference between the core wire 3a and the outer conductor 3c.

[0021] The core wire 3a is radially surrounded by an outer conductor 3c, with a dielectric 3b sandwiched between them, so that the outer conductor 3c can reduce the level of electromagnetic wave interference and leakage between the core wire 3a and the outside world.

[0022] Two coaxial cables 3 make up one set. One set of coaxial cables 3 transmits a differential signal. In the first cable assembly 1, multiple sets of coaxial cables 3, specifically eight sets, are arranged. Each set of coaxial cables 3 is spaced apart by a distance of about one cable. The potential difference between the core wires 3a of one set of coaxial cables 3 is the voltage level of the differential signal being transmitted.

[0023] In the coaxial cable 3, from one end in its extension direction (the end located on the negative side of the X-axis with respect to the center of the coaxial cable 3 as the reference), the outer circumferential surface extending in the extension direction is exposed, with the core wire 3a, dielectric 3b, outer conductor 3c, and jacket 3d extending in this order. The length of the exposed core wire 3a is the same for each coaxial cable 3 and is long enough for soldering to a signal contact 22 of a plug connector 20 (described later). The length of the exposed outer conductor 3c in the extension direction is the same for each coaxial cable 3 and is equal to or longer than the width in the X-axis direction of first ground bars 4A and 4B (described later). The multiple coaxial cables 3 are arranged in the arrangement direction with the exposed core wires 3a, dielectric 3b, and outer conductor 3c aligned in the extension direction.

[0024] [First Grand Bar] 1, the first ground bars 4A, 4B are rectangular, flat members made of a conductive material (e.g., metal) and extend in the arrangement direction of the coaxial cables 3. The first ground bars 4A, 4B do not necessarily have to be rectangular. It is sufficient that the first ground bars 4A, 4B extend in the arrangement direction of the coaxial cables 3 and contact the outer conductors 3c of all the coaxial cables 3.

[0025] The first ground bar 4A is arranged in the longitudinal direction of the arrangement direction of the coaxial cables 3, and is placed in its thickness direction so as to be in contact with the exposed surfaces of the multiple outer conductors 3c from the +Z side (positive side of the Z axis, based on the X axis: upward). The first ground bar 4B is arranged in the longitudinal direction of the arrangement direction of the coaxial cables 3, and is placed in its thickness direction so as to be in contact with the exposed surfaces of the multiple outer conductors 3c from the -Z side (negative side of the Z axis, based on the X axis: downward). The length of the first ground bars 4A and 4B in the arrangement direction is equal to or greater than the length of the multiple coaxial cables 3 in the arrangement direction.

[0026] In this way, the pair of first ground bars 4A, 4B contact the outer conductor 3c and sandwich the multiple coaxial cables 3 in the Z-axis direction. The position in the extending direction where the first ground bars 4A, 4B sandwich the outer conductor 3c is defined as a first position P1.

[0027] The first ground bar 4A has a flat plate portion 4a that contacts the outer conductor 3c and a conductive ground connection portion 4b that separates the exposed core wires 3a of adjacent coaxial cables 3. The ground connection portion 4b extends in the direction in which the exposed core wires 3a extend. The ground connection portion 4b extends from the outer edge of the flat plate portion 4a near one end of the coaxial cable 3 (the end located on the negative side of the X-axis, with the center of the coaxial cable 3 in the direction in which it extends) to between the exposed core wires 3a of the adjacent coaxial cables 3, bends the first ground bars 4A and 4B in the directions facing each other, and then extends further in the direction in which the core wires 3a of the coaxial cables 3 extend.

[0028] The first ground bar 4B is a flat plate-shaped member that comes into contact with the outer conductor 3c. The gap formed between the flat plate portion 4a of the first ground bar 4A and the first ground bar 4B is filled with solder, thereby forming the solder portion 4c.

[0029] [Second cable assembly] 1, the second cable assembly 2 includes a plurality of coaxial cables 3, a pair of conductive second ground bars 5A, 5B as second ground members, and a pair of second ground bars 6A, 6B as second ground members. The plurality of coaxial cables 3 have the same diameter and type. In the first embodiment, the plurality of coaxial cables 3 have the same diameter and type as the coaxial cables 3 of the first cable assembly 1, but this is not limiting.

[0030] In the second cable assembly 2, the coaxial cables 3 are arranged in the same direction as the coaxial cables 3 of the first cable assembly 1, and are arranged so that their extending directions match. Furthermore, in the second cable assembly 2, the coaxial cables 3 are arranged so that their tip ends, where the core wires 3a are exposed, are aligned and their arrangement direction matches the arrangement direction of the coaxial cables 3 in the first cable assembly 1.

[0031] In the first cable assembly 1, the outer conductor 3c is exposed in one location, whereas in the second cable assembly 2, the outer conductor 3c is exposed in two locations. With respect to these two locations, the position closer to the base end in the extension direction of the coaxial cable 3 (the end located on the positive side of the X-axis with respect to the center of the extension direction of the coaxial cable 3) is defined as a second position P2, and the position closer to the tip end (the end located on the negative side of the X-axis with respect to the center of the extension direction of the coaxial cable 3) is defined as a third position P3.

[0032] The second ground bars 5A and 5B clamp the coaxial cable 3 at a second position P2. The second ground bars 6A and 6B clamp the coaxial cable 3 at a third position P3. The second ground bar 6A is provided with a ground connection portion 4b like the first ground bar 4A, but the second ground bar 5A is not provided with a ground connection portion 4b.

[0033] The first cable assembly 1 and the second cable assembly 2 are stacked in multiple stages in a direction (Z-axis direction) perpendicular to the extension direction and arrangement direction, with the extending directions of the coaxial cables 3 aligned and the mating connector, i.e., the receptacle connector 30, visible from the tip of each assembly. Therefore, the Z-axis direction is also referred to as the stacking direction, meaning the direction in which the cables are stacked.

[0034] The state in which the receptacle connector 30 is visible from the tip means that the tip of the cable assembly positioned higher in the stacking direction is further in the extension direction than the tip of the cable assembly positioned lower (for example, the tip of the cable assembly positioned higher in the stacking direction indicates a smaller value on the X-axis), and the tip of each coaxial cable 3 of the first cable assembly 1 and the second cable assembly 2 does not need to be exposed on the underside of the plug connector 20 facing the receptacle connector 30. It is sufficient that the exposed portions of the core wires 3a of the coaxial cables 3 of the first cable assembly 1 and the second cable assembly 2 do not overlap with each other in the stacking direction, and the tip of the second cable assembly 2 in the second tier protrudes further in the extension direction than the tip of the first cable assembly 1 in the first tier (see FIGS. 5(A) and 5(B)).

[0035] In this embodiment, the first cable assembly 1 and the second cable assembly 2 are stacked so that the first position P1 and the second position P2 coincide with each other in the extending direction, so that the second ground bar 5B and the first ground bar 4A are positioned opposite each other (see FIG. 1).

[0036] In this embodiment, the first ground bar 4A and the second ground bar 5B are electrically connected to each other by soldering, and are also electrically connected to each other via a shell 24, which serves as a cover member of the plug connector 20 (see FIGS. 5(A) and 5(B)).

[0037] This lamination forms the cable assembly 10. The first cable assembly 1 and the second cable assembly 2 are assembled into a plug connector 20, as shown in Fig. 2. By configuring the first cable assembly 1 and the second cable assembly 2 in multiple stages in this way, the length of the plug connector 20 and the receptacle connector 30 in the arrangement direction can be shortened, and as a result, the mounting area of ​​the connector pair 50 can be reduced.

[0038] In this embodiment, the first cable assembly 1 and the second cable assembly 2 have the same number of coaxial cables 3, but this does not have to be the case. Also, the positions of the coaxial cables 3 in the Y-axis direction are the same, but they may be shifted by, for example, half a pitch.

[0039] [Connector pair] 2, the connector pair 50 includes a plug connector 20 and a receptacle connector 30. The cable assembly 10 is mounted on the plug connector 20 as a connector, and the receptacle connector 30 is mounted on a substrate 7.

[0040] As shown in FIG. 2, the receptacle connector 30 has a socket 30a that opens in the positive direction of the Z axis. The socket 30a is a recessed portion in the shape of a rectangular frame. In contrast, as shown in FIG. 3, the plug connector 20 has an insertion portion 20a that protrudes in the negative direction of the Z axis. The insertion portion 20a is a protruding portion in the shape of a rectangular frame. When the insertion portion 20a is inserted into the socket 30a, the plug connector 20 and the receptacle connector 30 are mated.

[0041] 4(A) and 4(B), mating of the plug connector 20 and the receptacle connector 30 in the Z-axis direction electrically connects the coaxial cable 3 of the cable assembly 10 mounted on the plug connector 20 to the electrical circuit of the substrate 7. In this way, the mating direction of the plug connector 20 and the receptacle connector 30 is the stacking direction of the first cable assembly 1 and the second cable assembly 2, i.e., the Z-axis direction.

[0042] [Plug connector] The plug connector 20 will now be described. As shown in Figures 5(A) and 5(B), the plug connector 20 includes the cable assembly 10 described above, a housing 21 made of an insulating material, signal contacts 22 as conductive contacts, conductive ground contacts 23 also as conductive contacts, a conductive shell 24 as a cover member, and a locking portion 25 that maintains the mated state with the receptacle connector 30.

[0043] The housing 21 is a case of the plug connector 20 made of, for example, insulating resin. The signal contacts 22 and the ground contacts 23 are assembled into this housing 21 by press-fitting or insert molding. The signal contacts 22 and the ground contacts 23 are arranged in the same direction as the coaxial cables 3 are arranged. The signal contacts 22 and the ground contacts 23 are arranged in two rows: a first row connected to the core wires 3a of the coaxial cables 3 of the first cable assembly 1, and a second row connected to the core wires 3a of the coaxial cables 3 of the second cable assembly 2.

[0044] In the first row, the signal contacts 22 are arranged so as to come into contact with the core wires 3a of the coaxial cables 3 in the first cable assembly 1 (see FIG. 5(A)). The ground contacts 23 are arranged so as to come into contact with the ground connection portions 4b in the first cable assembly 1 (see FIG. 5(B)). The ground contacts 23 are arranged on both sides of the pair of signal contacts 22 in the arrangement direction.

[0045] In the second row, the signal contacts 22 are arranged so as to come into contact with the core wires 3a of the coaxial cables 3 in the second cable assembly 2 (see FIG. 5(A)). The ground contacts 23 are arranged so as to come into contact with the ground connection portions 4b in the second cable assembly 2 (see FIG. 5(B)). The ground contacts 23 are arranged on both sides of the pair of signal contacts 22 in the arrangement direction.

[0046] As shown in FIG. 3, the shell 24 is disposed around the signal contacts 22 and the ground contacts 23 while being insulated from them. The shell 24 is provided with a contact piece forming portion 24a (see FIGS. 4(A) and 4(B)). The contact piece forming portion 24a is provided with a contact piece that contacts the second ground bars 5A and 6A of the second cable assembly 2. As shown in FIG. 5(B), the shell 24 also contacts the first ground bar 4B of the first cable assembly 1. As will be described later, the shell 24 is grounded to the board 7 by contacting the shell 34 of the receptacle connector 30. The shell 24 forms an electromagnetic wave shield surrounding the signal contacts 22 and the ground contacts 23, thereby suppressing the leakage or intrusion of electromagnetic waves between the signal contacts 22 and the ground contacts 23 and the outside world.

[0047] The locking portion 25 is rotatably attached to the shell 24. The locking portion 25 is provided with a locking portion 25a that locks with the receptacle connector 30, and an unlocking portion 25b (see FIG. 2). The locking portion 25a and the unlocking portion 25b are provided at both ends in the arrangement direction. When the plug connector 20 and the receptacle connector 30 are mated, the locking portion 25a locks with the locked portion 35 of the receptacle connector 30. The unlocking portion 25b can be manually operated to release the locked state between the locking portion 25a and the locked portion 35. Once the locked state is released, the plug connector 20 can be removed from the receptacle connector 30.

[0048] [Receptacle connector] Next, we will explain the receptacle connector 30. As shown in Figure 2, the receptacle connector 30 includes an insulating housing 31, conductive signal contacts 32, conductive ground contacts 33, a conductive shell 34, and a locked portion 35.

[0049] The housing 31 is a case of the receptacle connector 30 made of, for example, insulating resin. The signal contacts 32 and the ground contacts 33 are assembled into the housing 31 by press-fitting or insert molding. The signal contacts 32 and the ground contacts 33 are arranged in the same direction as the coaxial cables 3 are arranged.

[0050] The arrangement of the signal contacts 32 and the ground contacts 33 is formed in two rows: a first row connecting the signal contacts 22 and the ground contacts 23 that connect with the core wire 3a of the coaxial cable 3 of the first cable assembly 1, and a second row connecting the signal contacts 22 and the ground contacts 23 that connect with the core wire 3a of the coaxial cable 3 of the second cable assembly 2.

[0051] In the first row, the signal contacts 32 are arranged so as to be in contact with the signal contacts 22, and are soldered to the signal electrodes 7a of the substrate 7. The ground contacts 33 are arranged so as to be in contact with the ground contacts 23, and are soldered to the ground electrodes 7b of the substrate 7. The ground contacts 23 are arranged on both sides of the pair of signal contacts 22 in the arrangement direction.

[0052] In the second row, the signal contacts 32 are arranged so as to be in contact with the signal contacts 22, and are soldered to the signal electrodes 7a of the substrate 7. The ground contacts 33 are arranged so as to be in contact with the ground contacts 23, and are soldered to the ground electrodes 7b of the substrate 7. The ground contacts 23 are arranged on both sides of the pair of signal contacts 22 in the arrangement direction.

[0053] 2, the shell 34 is disposed around the signal contacts 32 and the ground contacts 33. The shell 34 is provided at a position where it comes into contact with the shell 24 of the plug connector 20. The shell 34 has a board connection portion 34a that is grounded to the board 7. The shell 34 suppresses leakage or intrusion of electromagnetic waves between the signal contacts 32 and the ground contacts 33 and the outside world.

[0054] The latched portions 35 are provided on both ends in the arrangement direction and are engaged with the locking portions 25a of the latching portions 25 of the plug connector 20.

[0055] [Transmission path] The plug connector 20 and the receptacle connector 30 form a transmission line between the coaxial cable 3 and the substrate 7. As shown in FIG. 5(A), the core wire 3a of the coaxial cable 3 of the first cable assembly 1, the signal contact 22, the signal contact 32, and the signal electrode 7a of the substrate 7 are connected in this order to form a first row of signal transmission lines. Furthermore, the core wire 3a of the coaxial cable 3 of the second cable assembly 2, the signal contact 22, the signal contact 32, and the signal electrode 7a of the substrate 7 are connected in this order to form a second row of signal transmission lines. As described above, in the first cable assembly 1 and the second cable assembly 2, two coaxial cables 3 form a pair to transmit differential signals, and therefore, in the connector pair 50, two signal transmission lines for transmitting differential signals are also formed as a pair.

[0056] 5(B), the outer conductor 3c of the coaxial cable 3 of the first cable assembly 1, the flat portion 4a and ground connection portion 4b of the first ground bar 4A, the ground contact 23, the ground contact 33, and the ground electrode 7b of the substrate 7 are connected in this order to form a first row of ground transmission lines. The outer conductor 3c of the coaxial cable 3 of the second cable assembly 2, the flat portion 4a and ground connection portion 4b of the first ground bar 6A, the ground contact 23, the ground contact 33, and the ground electrode 7b of the substrate 7 are connected in this order to form a second row of ground transmission lines. These ground transmission lines are formed on both sides of the pair of signal transmission lines described above in the Y-axis direction (arrangement direction).

[0057] 5(B), the first ground bars 4A, 4B, the second ground bars 5A, 5B, and the second ground bars 6A, 6B are in contact with the shell 24. Furthermore, the shell 24 of the plug connector 20 is in contact with the shell 34 of the receptacle connector 30. The board connection portion 34a of the shell 34 of the receptacle connector 30 is disposed on the XY plane (main surface) of the board 7 so as to surround the signal contacts 32 and the ground contacts 33, and is connected to the ground electrode 7b of the board 7 by soldering. Therefore, the shells 24, 34 form an electromagnetic shield that surrounds all four sides of the transmission line for signal transmission described above.

[0058] 5(A) and 5(B), the first ground bars 4A and 4B are disposed at a first position P1, which is a gap between the shell 24 and the coaxial cable 3. The second ground bars 5A and 5B are disposed at a second position P2, which is a gap between the shell 24 and the coaxial cable 3. The first ground bar 4A and the second ground bar 5B are connected by solder. Therefore, the first ground bars 4A and 4B and the second ground bars 5A and 5B function as electromagnetic wave shielding materials that block electromagnetic waves that pass through the gap between the shell 24 and the coaxial cable 3.

[0059] Fig. 6(A) shows the results of EMI analysis when the first ground bars 4A, 4B and the second ground bars 5A, 5B are not arranged between the shell 24 and the coaxial cable 3, specifically, when the first ground bars 4A, 4B are arranged in the first cable assembly 1 and the second cable assembly 2 does not have the second ground bars 5A, 5B, as in a conventional cable assembly. Fig. 6(B) shows the results of EMI analysis of the connector pair 50 according to this embodiment when the first ground bars 4A, 4B and the second ground bars 5A, 5B are arranged between the shell 24 and the coaxial cable 3. In Figs. 6(A) and 6(B), the stronger the electromagnetic wave intensity, the brighter the color.

[0060] 6(A) and 6(B), the provision of second ground bars 5A, 5B suppresses the leakage of electromagnetic waves through the gap between shell 24 and coaxial cable 3. From this analysis result, it is clear that the intrusion of electromagnetic waves into the interior of connector pair 50 through the gap between shell 24 and coaxial cable 3 can also be similarly suppressed.

[0061] As described above in detail, according to this embodiment, in the plug connector 20, the gap between the shell 24 and the coaxial cable 3 is blocked by the first ground bars 4A, 4B and the second ground bars 5A, 5B, thereby suppressing leakage or intrusion of electromagnetic waves.

[0062] Embodiment 2 Next, a description will be given of a second embodiment of the present invention. The configuration of the cable assembly structure 10 according to the second embodiment is the same as the configuration of the cable assembly structure 10 according to the first embodiment, except that the configuration of the second cable assembly 2 is different.

[0063] In the first embodiment, the second cable assembly 2 includes second ground bars 5A, 5B and second ground bars 6A, 6B. In contrast, the second cable assembly 2 according to the present embodiment shown in Figures 7(A) and 7(B) differs from the first embodiment in that the second ground bars 5A, 5B extend from the second position P2 to the third position P3, and second ground bars 6A, 6B are not provided.

[0064] In the present embodiment, the gap between the shell 24 and the coaxial cable 3 in the plug connector 20 is also blocked by the conductive first ground bars 4A, 4B and second ground bars 5A, 5B, thereby enabling a higher level of blocking of leakage or intrusion of electromagnetic waves. In addition, in the second cable assembly 2, the second ground bars 5A, 5B cover the exposed portion of the outer conductor 3c of the coaxial cable 3, thereby enabling impedance matching in that portion.

[0065] In this embodiment, the first ground bar 4A and the second ground bar 5B may also be electrically connected by soldering. Alternatively, the first ground bar 4A and the second ground bar 5B may be electrically connected via the shell 24. In this way, the gap between the first cable assembly 1 and the second cable assembly 2 can be blocked, and the leakage or intrusion of electromagnetic waves can be blocked at a higher level.

[0066] 8, cable assemblies may be stacked in three layers to form a cable assembly structure 10. In this case, a second cable assembly 2 in a second layer is stacked on top of a first cable assembly 1 in a first layer, and a second cable assembly 8 in a third layer is stacked on top of that. Like the second cable assembly 2, the second cable assembly 8 also includes second ground bars 5A and 5B that hold the coaxial cable 3 at a second position P2 in the gap between the coaxial cable 3 and the shell 24, and second ground bars 6A and 6B that hold the coaxial cable 3 at a third position P3' that is closer to the tip than the second position P2.

[0067] In order to make the receptacle connector 30 visible from the tip of the coaxial cable 3 of the second cable assembly 8, the third position P3' is located at a position different from the third position P3 in the X-axis direction. It is also possible to configure the cable assembly structure 10 by stacking cable assemblies in four or more stages. In this case, too, the cable assemblies are arranged so that the receptacle connector 30 is visible from the tip of all the cable assemblies.

[0068] In the above embodiment, the first ground bar 4A of the first cable assembly 1 and the second ground bar 5B of the second cable assembly 2 are in contact with each other. However, this is not limiting. For example, a conductive member may be inserted between the first ground bar 4A and the second ground bar 5B. Even in this case, the first ground bars 4A, 4B, the second ground bars 5A, 5B, and the inserted member may constitute an electromagnetic wave shielding member.

[0069] In the above embodiment, only the configuration of one end of the coaxial cable 3 has been described. However, the other end of the coaxial cable 3 can have the same configuration. The other end of the coaxial cable 3 also comprises a first cable assembly 1 and a second cable assembly 2, and a plug connector 20 including the first cable assembly 1 and the second cable assembly 2 is mated with a receptacle connector 30, allowing connection to another board.

[0070] In the above embodiment, the cable assembly 10, the plug connector 20, and the connector pair 50 are described as being for transmitting differential signals. However, the present invention is not limited to this. The present invention may also be applied to a cable assembly that transmits single-ended signals.

[0071] In the above embodiment, eight pairs of coaxial cables 3 are provided. However, this is not limitative. There is no restriction on the number of coaxial cables 3.

[0072] This invention allows various embodiments and modifications without departing from the broad spirit and scope of this invention. Furthermore, the above-described embodiments are intended to explain this invention and do not limit the scope of this invention. That is, the scope of this invention is defined by the claims, not the embodiments. Various modifications made within the scope of the claims and the meaning of the invention equivalent thereto are considered to be within the scope of this invention. [Industrial Applicability]

[0073] The present invention can be applied to connecting boards together using, for example, a coaxial cable. [Explanation of symbols]

[0074] 1 first cable assembly, 2 second cable assembly, 3 coaxial cable, 3a core wire, 3b dielectric, 3c outer conductor, 3d outer jacket, 4A, 4B first ground bar (first ground member), 4a flat plate portion, 4b ground connection portion, 4c solder portion, 5A, 5B, 6A, 6B second ground bar (second ground member), 7 substrate, 7a signal electrode, 7b ground electrode, 8 second cable assembly, 10 cable assembly structure, 20 plug connector (connector), 20a insertion portion, 21 housing, 22 signal contact (conductive contact), 23 ground contact (conductive contact), 24 shell (cover member), 24a contact piece forming portion, 25 latching portion, 25a locking portion, 25b unlocking portion, 30 receptacle connector (mating connector), 30a insertion port, 31 housing, 32 Signal contact, 33 ground contact, 34 shell, 34a board connection portion, 35 latched portion, 50 connector pair

Claims

1. A cable assembly structure comprising a conductive contact and a conductive cover member disposed around the contact, the cable assembly forming a part of a connector that mates with a mating connector, a cable assembly including a plurality of cables arranged in a row with the tip ends of the exposed core wires that come into contact with the contacts aligned, and a pair of conductive ground members that are electrically connected to the cover member and that sandwich the cables at the portions where the outer conductors of the cables are exposed; The cable assembly is stacked in a plurality of stages in a direction perpendicular to the extending direction and the arranging direction of the cables, with the extending directions of the cables aligned and the mating connector visible from the tip end of each cable, and is incorporated into the connector that mates with the mating connector in the stacking direction, In a first cable assembly in a first stage of the cable assemblies that is closer to the mating connector, a first ground member as one of the pair of ground members sandwiches the cable at a first position in a gap between the cable and the cover member, In a second cable assembly excluding the first cable assembly among the multiple stages of the cable assemblies, a second ground member as the pair of ground members sandwiches the cable at a second position in a gap between the cable and the cover member and a third position closer to the tip end than the second position. Cable assembly structure.

2. The second cable assembly is The second ground member may be: a first member for holding the cable at the second position and a second member for holding the cable at the third position; The cable assembly structure according to claim 1 .

3. The first ground member and the first member are electrically connected by solder. The cable assembly structure according to claim 2 .

4. The first ground member and the first member are electrically connected via the cover member. The cable assembly structure according to claim 2 .

5. The second ground member is a member extending from the second position to the third position; The cable assembly structure according to claim 1 .

6. The first ground member and the second ground member are electrically connected by solder. The cable assembly structure according to claim 5 .

7. The first ground member and the second ground member are electrically connected via the cover member. The cable assembly structure according to claim 5 .

8. A connector comprising the cable assembly structure according to any one of claims 1 to 7.

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