Cable assembly structure and connector

Abstract

In a cable assembly structure (10), a first cable assembly (1) and a second cable assembly (2) are stacked in a plurality of layers in a direction orthogonal to the extension direction and orthogonal to the arrangement direction of coaxial cables (3) in a state in which the extension directions of the coaxial cables (3) are aligned with each other and a receptacle connector (30) can be seen from the respective tip ends of the coaxial cables. The first cable assembly (1) and the second cable assembly (2) are fitted into a plug connector (20) that is fitted into a receptacle connector (30) in the stacking direction. In a first cable assembly (1) of a first layer, first ground rods (4A, 4B) sandwich a coaxial cable (3) at a first position (P1) of a gap between the coaxial cable (3) and a housing (24). In the second cable assembly (2), second ground rods (5A, 5B, 6A, 6B) sandwich the coaxial cable (3) at a second position (P2) of a gap between the coaxial cable (3) and the housing (24) and at a third position (P3) closer to the tip than the second position (P2).

Description

Technical Field

[0001] The invention relates to a cable assembly structure and a connector. Background Art

[0002] Patent Document 1 discloses a connector including a multi-pole coaxial cable connector assembly formed by stacking two layers of coaxial cable assemblies, wherein the coaxial cable assembly is formed by arranging coaxial cables in a row.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent No. 4068092 Summary of the invention

[0006] Problem that the invention aims to solve

[0007] The outer periphery of the connector disclosed in the above-mentioned Patent Document 1 is surrounded by a housing as an electromagnetic wave shielding member. Figure 1 As shown, for example, a gap is formed between the second conductive shell 45 and the coaxial cable 2 , and therefore there is a concern that electromagnetic waves may leak or mix in from the gap.

[0008] The present invention has been made under the above-mentioned actual circumstances, and an object of the present invention is to provide a cable assembly structure and a connector capable of suppressing the leakage or mixing of electromagnetic waves.

[0009] Solutions for solving problems

[0010] In order to achieve the above object, a cable assembly structure according to a first aspect of the present invention constitutes a part of a connector, the connector having a conductive contact and a conductive cover member arranged around the contact and being engaged with a mating connector, wherein:

[0011] The cable assembly structure has a cable assembly, which includes: a plurality of cables arranged in a row with their top ends aligned, the core wires contacting the contacts being exposed at the top ends; and a pair of conductive grounding members electrically connected to the cover member and clamping the cables at portions where the outer conductors of the cables are exposed.

[0012] The cable assembly is stacked in multiple layers in a direction orthogonal to the extending direction and the arrangement direction of the cables in a state where the extending directions of the cables are aligned with each other and the counterpart connector can be seen from the respective top ends of the cables, and is installed in the connector that is mated with the counterpart connector in the stacking direction.

[0013] In a first cable assembly of a first layer close to the counterpart connector among the multi-layered cable assemblies, a first grounding member as the pair of grounding members clamps the cable at a first position of a gap between the cable and the cover member,

[0014] In a second cable assembly other than the first cable assembly among the multi-layered cable assemblies, a second grounding member as 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 portion than the second position.

[0015] The second cable assembly may include, as the second grounding member, a first member that holds the cable at the second position and a second member that holds the cable at the third position.

[0016] The first ground member and the first member may be electrically connected by solder.

[0017] The first ground member and the first member may be electrically connected via the cover member.

[0018] The second grounding member may be composed of a member extending from the second position to the third position.

[0019] The first ground member and the second ground member may be electrically connected by solder.

[0020] The first ground member and the second ground member may be electrically connected via the cover member.

[0021] A connector according to a second aspect of the present invention includes the cable assembly structure according to the first aspect.

[0022] Effects of the Invention

[0023] According to the present invention, it is possible to suppress leakage or mixing of electromagnetic waves. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a perspective view showing the appearance of a first cable assembly and a second cable assembly according to Embodiment 1 of the present invention.

[0025] Figure 2 It is a perspective view showing the appearance of the connector pair before being mated.

[0026] Figure 3 It is a perspective view showing the appearance of the plug connector.

[0027] Figure 4A It is a perspective view showing the appearance of the connector pair after being fitted.

[0028] Figure 4B yes Figure 4A A top view of the connector pair.

[0029] Figure 5A yes Figure 4B VA-VA line cross-sectional view.

[0030] Figure 5B yes Figure 4B VB-VB line cross-sectional view.

[0031] Fig. 6A The following are the results of EMI (Electro Magnetic Interference) analysis when no ground rod is placed between the housing and the coaxial cable.

[0032] Figure 6B The following are the results of EMI analysis when a ground rod is placed between the housing and the coaxial cable.

[0033] Fig. 7A The connector pair of the second embodiment of the present invention is Figure 4B The VA-VA line cross-sectional view is equivalent to the cross-sectional view.

[0034] Figure 7B is with Figure 4B The VB-VB line cross-sectional view is equivalent to the cross-sectional view.

[0035] Figure 8 It is a diagram showing another example of the cable assembly structure. DETAILED DESCRIPTION

[0036] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, the same or equivalent parts are denoted by the same reference numerals.

[0037] Implementation Method 1

[0038] First, the first embodiment of the present invention is described. In the first embodiment, first, as Figure 1 As shown in FIG. 1 , a cable assembly structure 10 including a first cable assembly 1 and a second cable assembly 2 will be described. Figure 2 As shown in FIG. 1 , the receptacle connector 30 and the plug connector 20 having the cable assembly structure 10 are described. Figure 2 As shown, a connector pair 50 including a plug connector 20 and a receptacle connector 30 will be described. The cable assembly structure 10 provides a structure for suppressing leakage or mixing of electromagnetic waves between the inside and outside of the connector pair 50.

[0039] [First cable assembly]

[0040] like Figure 1As shown in FIG. 1 , the first cable assembly 1 includes a plurality of coaxial cables 3 and a pair of first grounding rods 4A and 4B as first grounding members. Figure 1 In the figure, only a portion close to one end of the coaxial cable 3 is shown, and illustration of other portions is omitted.

[0041] [Coaxial cable]

[0042] The plurality of coaxial cables 3 are, for example, cables of the same type and of the same diameter. The plurality of coaxial cables 3 are arranged in a row in an aligned manner. Figure 1 In the embodiment, the extending direction of the coaxial cable 3 is defined as the X-axis direction, and the arrangement direction of the coaxial cables 3 is defined as the Y-axis direction. In addition, the direction orthogonal to the extending direction and the arrangement direction is defined as the Z-axis direction. The following description is made with reference to the XYZ-axis rectangular coordinate system.

[0043] like Figure 1 As shown in FIG. 1 , the coaxial cable 3 includes a core wire 3a extending in an extension direction, a dielectric 3b covering an outer peripheral surface of the core wire 3a extending in the extension direction, an outer conductor 3c covering an outer peripheral surface of the dielectric 3b extending in the extension direction, and a sheath 3d covering an outer peripheral surface of the outer conductor 3c extending in the extension direction. The outer conductor 3c is grounded as described later, and the core wire 3a and the outer conductor 3c are insulated by the dielectric 3b. The voltage level of the signal transmitted in the coaxial cable 3 is determined by the potential difference between the core wire 3a and the outer conductor 3c.

[0044] The radial periphery around the core 3a is covered by the outer conductor 3c via the dielectric 3b. Therefore, the outer conductor 3c can reduce the level of electromagnetic wave mixing and leakage between the core 3a and the outside.

[0045] Two coaxial cables 3 form a group. One group of coaxial cables 3 transmits a differential signal. In the first cable assembly 1, a group of coaxial cables 3 is arranged in a plurality of groups, specifically eight groups. Each group of coaxial cables 3 is separated by a distance of one cable. The potential difference between the core wires 3a of a group of coaxial cables 3 becomes the voltage level of the transmitted differential signal.

[0046] In the coaxial cable 3, the outer peripheral surfaces of the core wire 3a, the dielectric 3b, the outer conductor 3c, and the outer sheath 3d extending in the extending direction are exposed in sequence from one end in the extending direction of the coaxial cable 3 (the end located in the negative direction of the X-axis with the center of the coaxial cable 3 as the reference). The exposed length of the core wire 3a is the same in each coaxial cable 3, and is a sufficient length for welding with the signal contact 22 of the plug connector 20 described later. The exposed length of the outer conductor 3c in the extending direction is the same in each coaxial cable 3, and is greater than or equal to the width of the first ground bars 4A and 4B described later in the X-axis direction. The plurality of coaxial cables 3 are arranged in the arrangement direction in a state where the core wire 3a, the dielectric 3b, and the outer conductor 3c exposed in the extending direction are aligned.

[0047] [1st ground rod]

[0048] like Figure 1 As shown, the first grounding rods 4A and 4B are rectangular and flat plate-shaped members formed of a conductive material (e.g., metal) extending in the arrangement direction of the coaxial cables 3. The first grounding rods 4A and 4B are not necessarily rectangular. The first grounding rods 4A and 4B only need to extend in the arrangement direction of the coaxial cables 3 and contact the outer conductors 3c of all the coaxial cables 3.

[0049] The first grounding bar 4A is disposed in a state of contacting the exposed surfaces of the plurality of outer conductors 3c from the +Z side (the side located in the positive direction of the Z axis with reference to the X axis: the upper side) in the plate thickness direction, with the arrangement direction of the coaxial cables 3 as the length direction. The first grounding bar 4B is disposed in a state of contacting the exposed surfaces of the plurality of outer conductors 3c from the -Z side (the side located in the negative direction of the Z axis with reference to the X axis: the lower side) in the plate thickness direction, with the arrangement direction of the coaxial cables 3 as the length direction. The length of the first grounding bars 4A and 4B in the arrangement direction is greater than the length of the plurality of coaxial cables 3 in the arrangement direction.

[0050] Thus, the pair of first ground bars 4A and 4B contact the outer conductor 3c and sandwich the plurality of coaxial cables 3 in the Z-axis direction. The position where the first ground bars 4A and 4B sandwich the outer conductor 3c and in the extending direction is referred to as the first position P1.

[0051] The first ground bar 4A includes a flat plate portion 4a in contact with the outer conductor 3c and a conductive ground connection portion 4b, and the ground connection portion 4b separates the exposed core wires 3a in the adjacent coaxial cables 3. The ground connection portion 4b extends along the extension direction of the exposed core wires 3a. The ground connection portion 4b extends from the outer edge of one end of the flat plate portion 4a close to the coaxial cable 3 (the end located in the negative direction of the X axis with the center of the extension direction of the coaxial cable 3 as the reference) to between the exposed core wires 3a of the adjacent coaxial cables 3, and is bent in the direction in which the first ground bars 4A and 4B are opposite to each other, and then further extends along the extension direction of the core wire 3a of the coaxial cable 3.

[0052] The first grounding bar 4B is a flat plate-shaped member that contacts the outer conductor 3c. A gap formed between the flat plate portion 4a of the first grounding bar 4A and the first grounding bar 4B is filled with solder, thereby forming a soldered portion 4c.

[0053] [Second cable assembly]

[0054] like Figure 1 As shown, the second cable assembly 2 includes a plurality of coaxial cables 3, a pair of conductive second grounding rods 5A and 5B as a second grounding member, and a pair of second grounding rods 6A and 6B also as a second grounding member. The plurality of coaxial cables 3 are of the same diameter and type. In the first embodiment, the plurality of coaxial cables 3 are of the same diameter and type as the coaxial cables 3 of the first cable assembly 1, but the present invention is not limited thereto.

[0055] 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 in such a manner that the extending directions coincide with each other. Furthermore, in the second cable assembly 2, the coaxial cables 3 are arranged in such a manner that the top ends thereof are aligned and the arrangement direction of the coaxial cables 3 in the first cable assembly 1 coincides with that of the coaxial cables 3, and the core wires 3a are exposed at the top ends thereof.

[0056] In the first cable assembly 1, the portion where the outer conductor 3c is exposed is one place, but in the second cable assembly 2, the portion where the outer conductor 3c is exposed is provided at two places. Of the two places, a position close to the base end (the end located in the positive direction of the X-axis with the center of the coaxial cable 3 in the extending direction) in the extending direction of the coaxial cable 3 is set as the second position P2, and a position close to the tip end (the end located in the negative direction of the X-axis with the center of the coaxial cable 3 in the extending direction) is set as the third position P3.

[0057] The second grounding bars 5A and 5B hold the coaxial cable 3 at the second position P2. The second grounding bars 6A and 6B hold the coaxial cable 3 at the third position P3. The second grounding bar 6A is provided with a ground connection portion 4b similar to the first grounding bar 4A, but the second grounding bar 5A is not provided with a ground connection portion 4b.

[0058] The first cable assembly 1 and the second cable assembly 2 are stacked in multiple layers in a direction (Z-axis direction) perpendicular to the extending direction and perpendicular to the arrangement direction, so that the extending directions of the coaxial cables 3 are aligned with each other and the receptacle connector 30, which is a counterpart connector, can be seen from the top end of each coaxial cable 3. Therefore, in terms of the relationship with the stacking direction, the Z-axis direction is also referred to as the stacking direction.

[0059] The state in which the receptacle connector 30 can be seen from the top end refers to a state in which the top end of the cable assembly located above in the stacking direction is located closer to the top end side than the top end of the cable assembly located below in the extension direction (for example, a state in which the top end of the cable assembly located above in the stacking direction shows a smaller value on the X-axis), and the top end of the coaxial cable 3 of each of the first cable assembly 1 and the second cable assembly 2 does not need to be exposed on the lower surface of the plug connector 20 opposite to the receptacle connector 30. In the stacking direction, the exposed parts 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 each other, and the top end of the second cable assembly 2 of the second layer only needs to protrude to a position closer to the top end side than the top end of the first cable assembly 1 of the first layer in the extension direction (refer to Figure 5A , Figure 5B ).

[0060] 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. Figure 1 ).

[0061] In this embodiment, the first grounding bar 4A and the second grounding bar 5B are electrically connected by solder. In addition, the first grounding bar 4A and the second grounding bar 5B are electrically connected via the housing 24 as the cover member of the plug connector 20 (see Figure 5A , Figure 5B ).

[0062] The cable assembly structure 10 is formed by this stacking. Figure 2As shown, the first cable assembly 1 and the second cable assembly 2 are incorporated into the plug connector 20. By configuring the first cable assembly 1 and the second cable assembly 2 in multiple layers, the lengths 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.

[0063] In this embodiment, the number of coaxial cables 3 is the same in the first cable assembly 1 and the second cable assembly 2, but it is not necessary to be the same. Also, the positions of the coaxial cables 3 in the Y-axis direction are the same, but they may be offset by, for example, half a pitch.

[0064] [Connector Pair]

[0065] like Figure 2 As shown, the connector pair 50 includes a plug connector 20 and a receptacle connector 30. The cable assembly structure 10 is mounted on the plug connector 20 as a connector, and the receptacle connector 30 is mounted on the substrate 7.

[0066] like Figure 2 As shown in FIG. 1 , the socket connector 30 is provided with an insertion port 30a which opens in the direction of the “+” direction of the Z axis. The insertion port 30a is a rectangular frame-shaped recess. Figure 3 As shown, the plug connector 20 is provided with an insertion portion 20a protruding in the direction of the "-" direction of the Z axis. The insertion portion 20a is a rectangular frame-shaped convex portion. The plug connector 20 and the receptacle connector 30 are mated by inserting the insertion portion 20a into the insertion port 30a.

[0067] like Figure 4A and Figure 4B As shown, the plug connector 20 and the socket connector 30 are engaged in the Z-axis direction, so that the coaxial cable 3 of the cable assembly structure 10 mounted on the plug connector 20 and the circuit of the substrate 7 are electrically connected. In this way, the plug connector 20 and the socket connector 30 use the stacking direction of the first cable assembly 1 and the second cable assembly 2, that is, the Z-axis direction as the engagement direction.

[0068] [Plug connector]

[0069] The plug connector 20 is described. Figure 5A and Figure 5B As shown, the plug connector 20 includes the above-mentioned cable assembly structure 10, a shell 21 composed of an insulating component, a signal contact 22 as a conductive contact, a conductive ground contact 23 also as a conductive contact, a conductive shell 24 as a cover component, and a locking portion 25 for maintaining the mating state with the socket connector 30.

[0070] The housing 21 is a box of the plug connector 20 made of, for example, insulating resin. The signal contact 22 and the ground contact 23 are assembled to the housing 21 by press-fitting or insert molding. The signal contact 22 and the ground contact 23 are arranged along the arrangement direction of the coaxial cable 3. The arrangement of the signal contact 22 and the ground contact 23 is formed by two rows, a first row connected to the core wire 3a of the coaxial cable 3 of the first cable assembly 1 and a second row connected to the core wire 3a of the coaxial cable 3 of the second cable assembly 2.

[0071] In the first row, the signal contacts 22 are arranged so as to contact the core wires 3a of the coaxial cables 3 of the first cable assembly 1 (see Figure 5A The ground contact 23 is arranged so as to contact the ground connection portion 4b of the first cable assembly 1 (see Figure 5B The ground contacts 23 are arranged on both sides of the arrangement direction of the signal contacts 22 in groups of two.

[0072] In the second row, the signal contacts 22 are arranged so as to contact the core wires 3a of the coaxial cables 3 of the second cable assembly 2 (see Figure 5A The ground contact 23 is arranged so as to contact the ground connection portion 4b of the second cable assembly 2 (see Figure 5B The ground contacts 23 are arranged on both sides of the arrangement direction of the signal contacts 22 in groups of two.

[0073] like Figure 3 As shown in FIG. 1 , the housing 24 is arranged around the signal contact 22 and the ground contact 23 in a state of being insulated from the signal contact 22 and the ground contact 23. The housing 24 is provided with a contact piece forming portion 24a (see FIG. 1 ). Figure 4A , Figure 4B The contact piece forming portion 24a is provided with a contact piece that contacts the second grounding bars 5A and 6A of the second cable assembly 2. Figure 5B As shown, the housing 24 is also in contact with the first ground bar 4B of the first cable assembly 1. As described later, the housing 24 is grounded to the substrate 7 by contacting the housing 34 of the receptacle connector 30. The housing 24 forms an electromagnetic wave shield surrounding the signal contact 22 and the ground contact 23, thereby suppressing leakage or mixing of electromagnetic waves from the outside.

[0074] The locking portion 25 is mounted so as to be rotatable relative to the housing 24. The locking portion 25 is provided with a lock releasing portion 25b and a lock portion 25a (see FIG. 2 ) which is locked with the receptacle connector 30. Figure 2). The locking portion 25a and the unlocking portion 25b are provided at both ends of the arrangement direction. When the plug connector 20 and the socket connector 30 are mated, the locking portion 25a is locked with the locked portion 35 of the socket connector 30. The unlocking portion 25b can release the locked state between the locking portion 25a and the locked portion 35 by manual operation. If the locked state is released, the plug connector 20 can be removed from the socket connector 30.

[0075] [Socket connector]

[0076] Next, the socket connector 30 will be described. Figure 2 As shown, the socket connector 30 includes an insulating housing 31 , conductive signal contacts 32 , conductive ground contacts 33 , a conductive shell 34 , and a locked portion 35 .

[0077] The housing 31 is a box of the receptacle connector 30 formed of, for example, insulating resin. The signal contacts 32 and the ground contacts 33 are assembled to the housing 31 by press-fitting or insert molding. The signal contacts 32 and the ground contacts 33 are arranged along the arrangement direction of the coaxial cables 3 .

[0078] The arrangement of the signal contacts 32 and the ground contacts 33 is formed by two columns: a first column connected to the signal contacts 22 and the ground contacts 23 connected to the core wire 3a of the coaxial cable 3 of the first cable assembly 1, and a second column connected to the signal contacts 22 and the ground contacts 23 connected to the core wire 3a of the coaxial cable 3 of the second cable assembly 2.

[0079] In the first column, the signal contact 32 is arranged in contact with the signal contact 22 and is soldered to the signal electrode 7a of the substrate 7. The ground contact 33 is arranged in contact with the ground contact 23 and is soldered to the ground electrode 7b of the substrate 7. The ground contacts 23 are arranged on both sides of the arrangement direction of the signal contacts 22 in groups of two.

[0080] In the second row, the signal contact 32 is arranged in contact with the signal contact 22 and is soldered to the signal electrode 7a of the substrate 7. The ground contact 33 is arranged in contact with the ground contact 23 and is soldered to the ground electrode 7b of the substrate 7. The ground contacts 23 are arranged on both sides of the arrangement direction of the signal contacts 22 in groups of two.

[0081] like Figure 2 As shown, the housing 34 is arranged around the signal contact 32 and the ground contact 33. The housing 34 is provided at a position in contact with the housing 24 of the plug connector 20. The housing 34 has a substrate connection portion 34a grounded to the substrate 7. The housing 34 is used to suppress leakage or mixing of electromagnetic waves between the signal contact 32 and the ground contact 33 and the outside world.

[0082] The locked portions 35 are provided at both ends in the arrangement direction and are engaged with the locking portions 25 a of the locking portion 25 of the plug connector 20 .

[0083] [Transmission path]

[0084] The plug connector 20 and the socket connector 30 form a transmission line between the coaxial cable 3 and the substrate 7. Figure 5A As shown, 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 sequence to form a first column of signal transmission lines. In addition, 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 sequence to form a second column of signal transmission lines. As described above, in the first cable assembly 1 and the second cable assembly 2, the two coaxial cables 3 are formed as a set to transmit differential signals, and therefore, in the connector pair 50, two signal transmission lines for transmitting differential signals are also formed as a set.

[0085] In addition, if Figure 5B As shown, the outer conductor 3c of the coaxial cable 3 of the first cable assembly 1, the flat plate portion 4a and the 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 sequence to form the first column grounding transmission line. In addition, the outer conductor 3c of the coaxial cable 3 of the second cable assembly 2, the flat plate portion 4a and the 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 sequence to form the second column grounding transmission line. These grounding transmission lines are formed on both sides of the above-mentioned two signal transmission lines in a set in the Y-axis direction (arrangement direction).

[0086] In addition, if Figure 5B As shown, the first grounding bars 4A, 4B, the second grounding bars 5A, 5B, and the second grounding bars 6A, 6B are in contact with the housing 24. Furthermore, the housing 24 of the plug connector 20 is in contact with the housing 34 of the receptacle connector 30. The substrate connection portion 34a of the housing 34 of the receptacle connector 30 is arranged on the XY plane (main surface) of the substrate 7 so as to surround the signal contacts 32 and the ground contacts 33, and is connected to the ground electrode 7b of the substrate 7 by welding. Therefore, the housings 24, 34 form an electromagnetic shielding member surrounding the above-mentioned transmission line for signal transmission.

[0087] like Figure 5A and Figure 5BAs shown in FIG. 1 , the first grounding rods 4A and 4B are arranged at the first position P1 which is the gap between the housing 24 and the coaxial cable 3. In addition, the second grounding rods 5A and 5B are arranged at the second position P2 which is the gap between the housing 24 and the coaxial cable 3. The first grounding rod 4A and the second grounding rod 5B are connected by solder. Therefore, the first grounding rods 4A and 4B and the second grounding rods 5A and 5B function as electromagnetic wave shielding materials that shield electromagnetic waves passing through the gap between the housing 24 and the coaxial cable 3.

[0088] exist Fig. 6A EMI analysis results are shown in the case where the first grounding rods 4A, 4B and the second grounding rods 5A, 5B are not arranged between the housing 24 and the coaxial cable 3. Specifically, the first grounding rods 4A, 4B are arranged in the first cable assembly 1 and the second grounding rods 5A, 5B are not arranged in the second cable assembly 2 as in the conventional cable assembly. Figure 6B 2 shows the analysis result of EMI of the connector pair 50 of this embodiment when the first ground bars 4A, 4B and the second ground bars 5A, 5B are arranged between the housing 24 and the coaxial cable 3. Fig. 6A and Figure 6B In the diagram, the greater the intensity of the electromagnetic wave, the brighter the color.

[0089] right Fig. 6A and Figure 6B By comparison, it can be seen that the second grounding rods 5A and 5B can suppress the leakage of electromagnetic waves through the gap between the housing 24 and the coaxial cable 3. This analysis result also shows that electromagnetic waves can be suppressed from entering the connector pair 50 through the gap between the housing 24 and the coaxial cable 3.

[0090] As described above in detail, according to the present embodiment, in the plug connector 20, the gap between the housing 24 and the coaxial cable 3 is closed by the first ground bars 4A, 4B and the second ground bars 5A, 5B, so that leakage or mixing of electromagnetic waves can be suppressed.

[0091] Implementation Method 2

[0092] Next, a second embodiment of the present invention will be described. The structure of the cable assembly structure 10 of the second embodiment is the same as that of the cable assembly structure 10 of the first embodiment, except that the structure of the second cable assembly 2 is different.

[0093] In the first embodiment, the second cable assembly 2 includes the second grounding bars 5A and 5B and the second grounding bars 6A and 6B. Fig. 7A and Figure 7BIn the second cable assembly 2 of the present embodiment shown, the second grounding bars 5A and 5B extend from the second position P2 to the third position P3, and the second grounding bars 6A and 6B are not provided.

[0094] In this embodiment as well, in the plug connector 20, the gap between the housing 24 and the coaxial cable 3 is closed by the conductive first ground bars 4A, 4B and the second ground bars 5A, 5B, so that the leakage or mixing of electromagnetic waves can be blocked at a higher level. In addition, in the second cable assembly 2, the exposed portion of the outer conductor 3c of the coaxial cable 3 is covered by the second ground bars 5A, 5B, so that impedance matching of the portion can be achieved.

[0095] In this embodiment as well, the first grounding rod 4A and the second grounding rod 5B may be electrically connected by solder. In addition, the first grounding rod 4A and the second grounding rod 5B may be electrically connected via the housing 24. In this way, the gap between the first cable assembly 1 and the second cable assembly 2 can be blocked, thereby blocking the leakage or mixing of electromagnetic waves at a higher level.

[0096] In addition, you can Figure 8 As shown, three layers of cable assemblies are stacked to form a cable assembly structure 10. In this case, the second cable assembly 2 of the second layer is stacked on the first cable assembly 1 of the first layer, and the second cable assembly 8 of the third layer is stacked on the second cable assembly 2 of the second layer. Similar to the second cable assembly 2, the second cable assembly 8 also includes second grounding bars 5A and 5B that clamp the coaxial cable 3 at the second position P2 of the gap between the coaxial cable 3 and the housing 24, and second grounding bars 6A and 6B that clamp the coaxial cable 3 at the third position P3' closer to the tip end than the second position P2.

[0097] In addition, in order to set the state that the receptacle connector 30 can be seen from the top end of the coaxial cable 3 of the second cable assembly 8, the third position P3' is a position different from the third position P3 in the X-axis direction. In addition, four or more layers of cable assemblies may be stacked to form the cable assembly structure 10. In this case, the cable assemblies are arranged in a state that the receptacle connector 30 can be seen from the top ends of all the cable assemblies.

[0098] In the above embodiment, the first grounding rod 4A of the first cable assembly 1 and the second grounding rod 5B of the second cable assembly 2 are in contact with each other. However, the present invention is not limited thereto. For example, a conductive member may be inserted between the first grounding rod 4A and the second grounding rod 5B. Even in this case, the first grounding rods 4A and 4B, the second grounding rods 5A and 5B, and the inserted member may constitute an electromagnetic wave shielding member.

[0099] In the above embodiment, only the structure of one end of the coaxial cable 3 is described. However, the structure of the other end of the coaxial cable 3 can also be set to the same structure. The first cable assembly 1 and the second cable assembly 2 can also be formed at the other end of the coaxial cable 3, and the receptacle connector 30 and the plug connector 20 including the first cable assembly 1 and the second cable assembly 2 can be engaged to connect to other substrates.

[0100] In the above embodiment, the cable assembly structure 10, the plug connector 20, and the connector pair 50 for transmitting differential signals are described. However, the present invention is not limited thereto and can also be applied to a cable assembly structure for transmitting single-ended signals.

[0101] In addition, in the above embodiment, eight groups of two coaxial cables 3 are provided, but the present invention is not limited thereto. The number of coaxial cables 3 is not limited.

[0102] The present invention can realize various embodiments and variations without departing from the broad spirit and scope of the present invention. In addition, the above-mentioned embodiments are used to illustrate the present invention, rather than to limit the scope of the present invention. That is, the scope of the present invention is not shown by the embodiments but by the claims. In addition, various variations implemented within the scope of the claims and within the scope of the meaning of the invention equivalent thereto are considered to be within the scope of the present invention.

[0103] In addition, this application claims priority based on Japanese Patent Application No. 2022-98123 for which it applied on June 17, 2022, and the specification, claims and drawings of Japanese Patent Application No. 2022-98123 are incorporated into this specification in their entirety by reference.

[0104] Industrial Applicability

[0105] The present invention can be applied, for example, to a case where substrates are connected to each other using a coaxial cable.

[0106] Description of Reference Numerals

[0107] 1. First cable assembly; 2. Second cable assembly; 3. Coaxial cable; 3a. Core wire; 3b. Dielectric; 3c. External conductor; 3d. Sheath; 4A, 4B. First grounding rod (first grounding member); 4a. Flat plate; 4b. Grounding connection; 4c. Welding portion; 5A, 5B, 6A, 6B. Second grounding rod (second grounding member); 7. Substrate; 7a. Signal electrode; 7b. Grounding electrode; 8. Second cable assembly; 10. Cable assembly structure; 20. Plug connector (connector); 1. connector); 20a, insertion portion; 21, shell; 22, signal contact (conductive contact); 23, ground contact (conductive contact); 24, shell (cover member); 24a, contact piece forming portion; 25, locking portion; 25a, locking portion; 25b, lock release portion; 30, socket connector (object connector); 30a, insertion port; 31, shell; 32, signal contact; 33, ground contact; 34, shell; 34a, substrate connecting portion; 35, locked portion; 50, connector pair.

Claims

1. A cable assembly structure, which constitutes a part of a connector, the connector having a conductive contact and a conductive cover member arranged around the contact and being mated with a mating connector, wherein: The cable assembly structure has a cable assembly, which includes: a plurality of cables arranged in a row with their top ends aligned, and core wires contacting the contact points are exposed at the top ends; and a pair of conductive grounding members electrically connected to the cover member and clamping the cable at a portion where the outer conductor of the cable is exposed, The cable assembly is stacked in multiple layers in a direction orthogonal to the extending direction and the arrangement direction of the cables in a state where the extending directions of the cables are aligned with each other and the counterpart connector can be seen from the respective top ends of the cables, and is installed in the connector that is mated with the counterpart connector in the stacking direction. In a first cable assembly of a first layer close to the counterpart connector among the multi-layered cable assemblies, a first grounding member as the pair of grounding members clamps the cable at a first position of a gap between the cable and the cover member, In a second cable assembly other than the first cable assembly among the multi-layered cable assemblies, a second grounding member as 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 portion than the second position.

2. The cable assembly structure according to claim 1, wherein: The second cable assembly includes a first member that holds the cable at the second position and a second member that holds the cable at the third position as the second grounding member.

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

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

5. The cable assembly structure according to claim 1, wherein: The second grounding member is composed of a member extending from the second position to the third position.

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

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

8. A connector, wherein: This connector includes the cable assembly structure according to any one of claims 1 to 7.

Images