Connector, connector aggregate, connector system, and transmission line connection system

Abstract

To provide a connector capable of implementing further improvement of an electric characteristic of a transmission line and further high-density downsizing of the transmission line.SOLUTION: Provided is a connector comprising: a cylindrical side wall part; a first insertion part formed at one end of the cylindrical side wall part; a second insertion part formed at the other end of the cylindrical side wall part facing the one end of the cylindrical side wall part; a first side wall protrusion part that is provided on an inner wall of the cylindrical side wall part and is formed so as to protrude from the inner wall to the inside direction to go around the inner wall; a second side wall protrusion part that is provided on the inner wall of the cylindrical side wall part and is formed so as to protrude from the inner wall to the inside direction to go around the inner wall; and at least one side wall recess part that is provided on the inner wall of the cylindrical side wall part and is formed so as to recess in the outside direction from the inner wall to go around the inner wall. Penetration is from the first insertion part to the second insertion part. In order from the first insertion part side, the first side wall protrusion part, and the at least one side wall recess part, and the second side wall protrusion part are arranged.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a connector, a connector assembly, a connector system, and a transmission line connection system, and in particular to a connector that constitutes part of a transmission line, a connector assembly that constitutes part of a transmission line, a connector system that includes at least the connector and a cable, a transmission line connection system that includes at least the connector, a coaxial cable, and a relay connector, and a transmission line connection system that includes at least the connector assembly, a coaxial cable, and a relay connector. [Background technology]

[0002] BACKGROUND ART Conventionally, research and development has been actively conducted to improve electrical characteristics by making extensive use of coaxial cables and the like that constitute transmission lines in wiring, for example, in electronic devices, information and communication devices, industrial devices, measuring devices, and the like.

[0003] For example, Patent Document 1 proposes a technology relating to a relay connector for electrically connecting a cable including at least one internal conductor to an FPC (Flexible Printed Circuits) having a terminal portion with an exposed conductor portion.

[0004] This technology is characterized by a housing having a through hole through which an internal conductor and an exposed conductor portion can be selectively inserted in correspondence with each other, and is configured so that the internal conductor and the corresponding exposed conductor portion are engaged within the through hole and a pressure contact force is applied to the engaged portion. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2000-182689 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the technology proposed in Patent Document 1 may not be able to further improve the connection reliability between the connector and the cable (particularly, the coaxial cable), further improve the electrical characteristics of the transmission line, or further reduce the density and size of the transmission line. Here, connection reliability refers to the fixing force between the connector and the cable (particularly, the coaxial cable), i.e., the resistance of the cable (particularly, the coaxial cable) to coming loose from the connector after the cable (particularly, the coaxial cable) has been inserted into the connector.

[0007] The present invention has been made in view of the above circumstances, and its main object is to provide a connector, connector assembly, connector system, and transmission line connection system that can further improve the connection reliability between a connector and a cable (especially a coaxial cable), further improve the electrical characteristics of a transmission line, and achieve further high-density and miniaturization of the transmission line. [Means for solving the problem]

[0008] As a result of intensive research conducted by the inventors to achieve the above-mentioned objectives, they succeeded in further improving the connection reliability between the connector and the cable (especially the coaxial cable), further improving the electrical characteristics of the transmission line, and further reducing the density and size of the transmission line, thereby completing the present invention.

[0009] That is, in a first aspect, the present invention provides: A cable and a connector are provided. When the cable is inserted into the connector, A connector system is provided in which the cable and the connector are mated.

[0010] In the connector system according to the first aspect of the present invention, The cable may have a cable entry portion; The connector may have a connector insertion portion, The cable and the connector may each have a structure that makes it difficult for the cable to come off the connector when the cable insertion portion is inserted into the connector insertion portion. The connector system according to the first aspect of the present invention may be a system adapted to the above structure.

[0011] A connector system according to a first aspect of the present invention comprises: The device may further include a mating jig adapted to mate the cable and the connector. In addition, in the connector system according to the first aspect of the present invention, The cable, the connector, and the mating jig may each have a structure that makes it difficult for the cable to come out of the connector via the mating jig when the cable insertion portion is inserted into the connector insertion portion. Furthermore, the connector system according to the first aspect of the present invention may be a system adapted to the above structure.

[0012] In a second aspect of the present invention, A cylindrical side wall portion; a first insertion portion formed at one end of the cylindrical side wall portion; a second insertion portion formed at the other end of the cylindrical side wall portion opposite to the one end of the cylindrical side wall portion; a first side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; a second side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; at least one sidewall recess provided on an inner wall of the cylindrical sidewall portion, recessed outward from the inner wall and formed around the inner wall; penetrates from the first insertion portion to the second insertion portion, The connector has arranged, in order from the first insertion portion side, the first sidewall protrusion, the at least one sidewall recess, and the second sidewall protrusion.

[0013] In the connector according to the second aspect of the present invention, The length of the first side wall convex portion in the direction penetrating from the first insertion portion to the second insertion portion may be greater than the length of the second side wall convex portion in the direction penetrating from the first insertion portion to the second insertion portion.

[0014] The connector according to the second aspect of the present invention may be a superconductor.

[0015] In a third aspect of the present invention, A plurality of connectors are provided. Each of the plurality of connectors A cylindrical side wall portion; a first insertion portion formed at one end of the cylindrical side wall portion; a second insertion portion formed at the other end of the cylindrical side wall portion opposite to the one end of the cylindrical side wall portion; a first side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; a second side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; at least one sidewall recess provided on an inner wall of the cylindrical sidewall portion, recessed outward from the inner wall and formed around the inner wall; penetrates from the first insertion portion to the second insertion portion, the first sidewall protrusion, the at least one sidewall recess, and the second sidewall protrusion are arranged in this order from the first insertion portion side, The connector assembly is provided such that the plurality of connectors are formed in a honeycomb shape when viewed from the first insertion portion side.

[0016] In the connector assembly according to the third aspect of the present invention, Each of the plurality of connectors The length of the first side wall convex portion in the direction penetrating from the first insertion portion to the second insertion portion may be greater than the length of the second side wall convex portion in the direction penetrating from the first insertion portion to the second insertion portion.

[0017] In the connector assembly according to the third aspect of the present invention, Each of the plurality of connectors may be a superconductor.

[0018] In a fourth aspect of the present invention, a connector, a first coaxial cable, and a second coaxial cable; The connector: A cylindrical side wall portion; a first insertion portion formed at one end of the cylindrical side wall portion; a second insertion portion formed at the other end of the cylindrical side wall portion opposite to the one end of the cylindrical side wall portion; a first side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; a second side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; at least one sidewall recess provided on an inner wall of the cylindrical sidewall portion, recessed outward from the inner wall and formed around the inner wall; penetrates from the first insertion portion to the second insertion portion, the first sidewall protrusion, the at least one sidewall recess, and the second sidewall protrusion are arranged in this order from the first insertion portion side, The first coaxial cable a first central conductor, a first insulator disposed around the outer periphery of the first central conductor, and a first outer conductor disposed around the outer periphery of the first insulator; The second coaxial cable a second central conductor, a second insulator disposed around the outer periphery of the second central conductor, and a second outer conductor disposed around the outer periphery of the second insulator; the second outer conductor has a second outer conductor recess formed around the second insulator and recessed toward the second insulator; a plurality of split end pieces of the second outer conductor split in the longitudinal direction of the second coaxial cable are formed on the tip side of the second outer conductor; the first coaxial cable is inserted into the first insertion portion of the connector; the second coaxial cable is inserted into the second insertion portion of the connector; the first side wall protrusion of the connector and the first outer conductor of the first coaxial cable come into contact with each other, and the first side wall protrusion of the connector and the first outer conductor of the first coaxial cable are electrically connected to each other; the second outer conductor recess of the second coaxial cable is fitted into the second side wall protrusion of the connector, so that the second side wall protrusion of the connector and the second outer conductor of the second coaxial cable are electrically connected; The second outer conductor split end piece of the second coaxial cable extends outward from the second outer conductor of the connector and contacts an inner wall of the connector that is positioned between the at least one recess of the connector and the second side wall protrusion of the connector, thereby electrically connecting the inner wall of the connector and the second outer conductor of the second coaxial cable.

[0019] A transmission line connection system according to a fourth aspect of the present invention comprises: and In the transmission line connection system according to the fourth aspect of the present invention, The pin may have a first insertion opening and a second insertion opening opposite the first insertion opening, The first central conductor of the first coaxial cable may be inserted into the first insertion port, The second central conductor of the second coaxial cable may be inserted into the second insertion port, The first central conductor of the first coaxial cable and the second central conductor of the second coaxial cable may be electrically connected via the pin.

[0020] In a fifth aspect of the present invention, a connector assembly, a plurality of first coaxial cables, and a plurality of second coaxial cables; Each connector of the connector assembly is A cylindrical side wall portion; a first insertion portion formed at one end of the cylindrical side wall portion; a second insertion portion formed at the other end of the cylindrical side wall portion opposite to the one end of the cylindrical side wall portion; a first side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; a second side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; at least one sidewall recess provided on an inner wall of the cylindrical sidewall portion, recessed outward from the inner wall and formed around the inner wall; penetrates from the first insertion portion to the second insertion portion, the first sidewall protrusion, the at least one sidewall recess, and the second sidewall protrusion are arranged in this order from the first insertion portion side, Each of the plurality of first coaxial cables comprises: a first central conductor, a first insulator disposed around the outer periphery of the first central conductor, and a first outer conductor disposed around the outer periphery of the first insulator; Each of the plurality of second coaxial cables comprises: a second insulator disposed on an outer periphery of the second central conductor; and a second outer conductor disposed on an outer periphery of the second insulator, the second outer conductor has a second outer conductor recess formed around the second insulator and recessed toward the second insulator; a plurality of split end pieces of the second outer conductor split in the longitudinal direction of the second coaxial cable are formed on the tip side of the second outer conductor; the respective first coaxial cables are inserted into the first insertion portions of the respective connectors; the respective second coaxial cables are inserted into the second insertion portions of the respective connectors; the first side wall protrusions of the respective connectors come into contact with the first outer conductors of the respective first coaxial cables, and the first side wall protrusions of the respective connectors are electrically connected to the first outer conductors of the respective first coaxial cables; the second side wall protrusions of the respective connectors are fitted into the second outer conductor recesses of the respective second coaxial cables, so that the second side wall protrusions of the respective connectors and the second outer conductors of the respective second coaxial cables are electrically connected; The second outer conductor split end piece of each of the second coaxial cables extends in an outward direction of the second outer conductor of each of the second coaxial cables and contacts an inner wall of each of the connectors that is positioned between the at least one recess of each of the connectors and the second side wall protrusion of each of the connectors, thereby electrically connecting the inner wall of each of the connectors and the second outer conductor of each of the second coaxial cables.

[0021] A transmission line connection system according to a fifth aspect of the present invention comprises: It may have a plurality of pins, In a transmission line connection system according to a fifth aspect of the present invention, Each of the plurality of pins may have a first insertion opening and a second insertion opening opposite the first insertion opening, The first central conductor of each of the first coaxial cables may be inserted into the first insertion port, The second central conductors of the second coaxial cables may be inserted into the second insertion ports, The first central conductor of the first coaxial cable and the second central conductor of the second coaxial cable may be electrically connected via the pin.

[0022] Finally, in a sixth aspect, the present invention provides: A coaxial cable having a central conductor, an insulator disposed around the central conductor, and an outer conductor disposed around the insulator, the outer conductor has an outer conductor recess formed to be recessed toward the insulator and to surround the insulator, The coaxial cable has a plurality of second outer conductor split end pieces formed on the tip side of the outer conductor, the split end pieces being split in the longitudinal direction of the coaxial cable. [Effects of the Invention]

[0023] According to the present invention, it is possible to further improve the connection reliability between a connector and a cable (especially a coaxial cable), further improve the electrical characteristics of a transmission line, and further reduce the density and size of a transmission line. Note that the effects described here are not necessarily limited to those described herein and may be any of the effects described in this specification. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a diagram for explaining Example 1 of a transmission line connection system according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a diagram showing a configuration example of Example 1 of a transmission line connection system according to the first embodiment to which the present invention is applied. [Figure 3] FIG. 3 is a diagram for explaining Example 2 of the transmission line connection system according to the second embodiment of the present invention. [Figure 4] FIG. 4 is a diagram for explaining Example 2 of the transmission line connection system according to the second embodiment of the present invention. [Figure 5] FIG. 5 is a diagram showing an example of the configuration of a connector assembly according to a third embodiment of the present invention. [Figure 6] FIG. 6 is a diagram showing a configuration example of Example 3 of a transmission line connection system according to the fourth embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0025] A preferred embodiment for carrying out the present invention will be described below. The embodiment described below shows an example of a typical embodiment of the present invention, and the scope of the present invention should not be construed as being narrow.

[0026] Unless otherwise specified, in the drawings, "upper" means the upper direction or upper side in the drawing, "lower" means the lower direction or lower side in the drawing, "left" means the left direction or left side in the drawing, and "right" means the right direction or right side in the drawing. Furthermore, in the drawings, the same or equivalent elements or members are given the same reference numerals, and redundant explanations will be omitted.

[0027] The explanation will be given in the following order. 1. Overview of the present invention (connector and connector system) 2. First embodiment (Example 1 of transmission line connection system) 3. Second Embodiment (Example 2 of Transmission Line Connection System) 4. Third embodiment (example of connector assembly) 5. Fourth embodiment (Example 3 of transmission line connection system)

[0028] <1. Overview of the present invention> First, an overview of the present invention will be described. The present invention relates to a connector, a connector assembly, a connector system, and a transmission line connection system. Here, the connector and connector system according to the present invention will be described. Note that examples of the connector assembly, connector system, and transmission line connection system according to the present invention will be described in detail in the sections on first to fourth embodiments of the present invention described later.

[0029] A connector according to the present invention will now be described.

[0030] The connector of the present invention has a cylindrical side wall portion, a first insertion portion formed at one end of the cylindrical side wall portion, and a second insertion portion formed at the other end of the cylindrical side wall portion opposite the one end of the cylindrical side wall portion.

[0031] In addition, the connector of the present invention has a first side wall protrusion provided on the inner wall of a cylindrical side wall portion, protruding inward from the inner wall and formed to surround the inner wall, a second side wall protrusion provided on the inner wall of the cylindrical side wall portion, protruding inward from the inner wall and formed to surround the inner wall, and at least one side wall recess provided on the inner wall of the cylindrical side wall portion, recessed outward from the inner wall and formed to surround the inner wall.

[0032] In the connector according to the present invention, the connector penetrates from the first insertion portion to the second insertion portion, and is arranged, in order from the first insertion portion, with the first sidewall protrusion, the at least one sidewall recess, and the second sidewall protrusion. Also, in the connector according to the present invention, the length of the first sidewall protrusion in the direction penetrating from the first insertion portion to the second insertion portion is greater than the length of the second sidewall protrusion in the direction penetrating from the first insertion portion to the second insertion portion.

[0033] The connector may be made of at least one material selected from the group consisting of stainless steel, beryllium copper, phosphor bronze, and brass. When the connector contains stainless steel, it provides heat insulation and corrosion resistance, while when it contains beryllium copper or phosphor bronze, it provides heat insulation. Furthermore, when the connector contains phosphor bronze or brass, it becomes non-magnetic. The connector may also be made of a superconductor. Furthermore, the inner wall of the cylindrical side wall of the connector may be plated (e.g., gold-plated) to improve conductivity (electrical properties).

[0034] Next, a connector system according to the present invention will be described.

[0035] The connector system according to the present invention comprises a cable (particularly a coaxial cable) and a connector, and the cable and the connector are mated by being inserted into the connector. The cable is, for example, a coaxial cable, but is not limited to this and may be a flat cable or other cable.

[0036] In the connector system of the present invention, the cable (particularly a coaxial cable) has a cable insertion portion, the connector has a connector insertion portion, and the cable and the connector may each have a structure that makes it difficult for the cable to come out of the connector when the cable insertion portion is inserted into the connector insertion portion.

[0037] The connector system according to the present invention may further include a mating jig adapted to mate the cable (particularly a coaxial cable) and the connector. In the connector system according to the present invention further comprising a mating jig, the cable, the connector, and the mating jig may each have a structure that makes it difficult for the cable, whose cable insertion portion is inserted into the connector insertion portion, to come out of the connector via the mating jig.

[0038] For example, the tip side of the outer conductor may be slit in the longitudinal direction of the cable to form a plurality of split end pieces of the outer conductor. The slits give the split end pieces springiness (elasticity), and when the split end pieces of the outer conductor are pressed (shrunk) inward (towards the insulator), a mating jig is mounted on the outer surface of the split end pieces of the outer conductor, and the mating jig is inserted into the connector together with the coaxial cable while biting into the connector, thereby further achieving the effect of making it difficult for the coaxial cable to come out of the connector via the mating jig.

[0039] Hereinafter, embodiments of the present invention will be described specifically and in detail.

[0040] 2. First Embodiment (Example 1 of Transmission Line Connection System) A transmission line connection system according to a first embodiment (first example of a transmission line connection system) of the present invention will be described with reference to FIGS. 1 and 2. FIG.

[0041] FIG. 1 is a diagram for explaining Example 1 of a transmission line connection system according to a first embodiment of the present invention, and more specifically, a diagram for explaining a transmission line connection system 1000. As shown in FIG.

[0042] FIG. 2 is a diagram showing a configuration example of Example 1 of a transmission line connection system according to a first embodiment to which the present invention is applied, and specifically, a diagram showing a configuration example of a transmission line connection system 1000.

[0043] Fig. 1 shows a state before a first coaxial cable 200 and a second coaxial cable 300 are electrically connected to a connector 100 in a transmission line connection system 1000. That is, Fig. 1 shows a state before the first coaxial cable 200 is inserted into a first insertion portion 2 of the connector 100, and a state before the second coaxial cable 300 is inserted into a second insertion portion 3 of the connector 100. Note that Fig. 1 shows a side cross-sectional view of the connector 100, and a side view of the first coaxial cable 200 and the second coaxial cable 300.

[0044] 2 also shows a state after the first coaxial cable 200 and the second coaxial cable 300 are electrically connected to the connector 100 in the transmission line connection system 1000. Note that in FIG. 2 as well, the connector 100 is shown in a side cross-sectional view, and the first coaxial cable 200 and the second coaxial cable 300 are shown in a side view.

[0045] The connector 100 has a cylindrical side wall portion 1, a first insertion portion 2 formed at one end of the cylindrical side wall portion 1, a second insertion portion 3 formed at the other end of the cylindrical side wall portion opposite the one end of the cylindrical side wall portion 1, a first side wall protrusion 5 provided on the inner wall of the cylindrical side wall portion 1 and formed to protrude inward from the inner wall and surround the inner wall, a second side wall protrusion 8 provided on the inner wall of the cylindrical side wall portion 1 and formed to protrude inward from the inner wall and surround the inner wall, and a side wall recess 6 provided on the inner wall of the cylindrical side wall portion 1 and formed to be recessed outward from the inner wall and surround the inner wall.

[0046] The connector 100 penetrates from the first insertion portion 2 to the second insertion portion 3, and is provided with a first side wall protrusion 5, a side wall recess 6, and a second side wall protrusion 8 in this order from the first insertion portion 2 side.

[0047] In the connector 100, the length of the first side wall protrusion 5 in the direction penetrating from the first insertion portion 2 to the second insertion portion 3 is greater than the length of the second side wall protrusion 8 in the direction penetrating from the first insertion portion 2 to the second insertion portion 3.

[0048] The first coaxial cable 200 has a first central conductor 201, a first insulator 204 disposed around the outer periphery of the first central conductor 201, and a first outer conductor 202 disposed around the outer periphery of the first insulator 204. The tip of the first central conductor 201 (the right end of the first central conductor 201 in FIG. 1) is inserted into a first insertion opening 201-1 provided in a pin 203.

[0049] The first central conductor 201 may comprise annealed copper wire, the first insulator 204 may comprise a polymer material such as polyethylene, and the first outer conductor 202 may comprise braided copper wire.

[0050] Each of the first central conductor 201, the first outer conductor 202 and the pin 203 may include at least one material selected from the group consisting of stainless steel, beryllium copper, phosphor bronze and brass.

[0051] When the first central conductor 201, the first outer conductor 202, and the pin 203 each contain stainless steel, heat insulation and corrosion resistance are obtained, and when they contain beryllium copper or phosphor bronze, heat insulation is obtained. Furthermore, when the first central conductor 201, the first outer conductor 202, and the pin 203 each contain phosphor bronze or brass, they become non-magnetic.

[0052] The second coaxial cable 300 has a second center conductor 301, a second insulator 304 disposed around the outer periphery of the second center conductor 301, and a second outer conductor 302 disposed around the outer periphery of the second insulator 304. The tip portion located at the tip of the second center conductor 301 may have a pointed shape, in which case the second center conductor 301 is inserted into the connector 100 without being inserted (connected) to a pin, thereby improving the fit between the second center conductor 301 and the connector 100, and the second center conductor 301 with such a pointed tip shape may be used.

[0053] The second outer conductor 302 of the second coaxial cable 300 has a second outer conductor recess 305 formed so as to be recessed and wound around the second insulator 304 (downward in FIG. 1 ). The second outer conductor recess 305 has a substantially rectangular shape in a cross section when the second coaxial cable 300 is cut in the longitudinal direction of the second coaxial cable 300. The second outer conductor recess 305 may be made by scraping (cutting) the second outer conductor 302.

[0054] A plurality of second outer conductor split end pieces 302-1 and 302-2, which are slit and split, are formed on the tip side (leftward in FIG. 1) of the second outer conductor 302 in the longitudinal direction of the second coaxial cable 300. As shown in FIGS. 1 and 2, a second outer conductor split portion 302-3 is formed between the second outer conductor split end piece 302-1 and the second outer conductor split end piece 302-2. The second outer conductor split end pieces 302-1 and 302-2 have spring properties (elasticity) due to the slits formed therein as described above.

[0055] The second central conductor 301 may comprise annealed copper wire, the second insulator 304 may comprise a polymer material such as polyethylene, and the second outer conductor 302 may comprise braided copper wire.

[0056] Each of the second central conductor 301 and the first outer conductor 302 may contain at least one material selected from the group consisting of stainless steel, beryllium copper, phosphor bronze, and brass.

[0057] If the second central conductor 301 and the second outer conductor 302 each contain stainless steel, they will have heat insulating properties and corrosion resistance, and if they contain beryllium copper or phosphor bronze, they will have heat insulating properties. Furthermore, if the second central conductor 301 and the second outer conductor 302 each contain phosphor bronze or brass, they will be non-magnetic.

[0058] As shown in FIG. 2, a first coaxial cable 200 is inserted into a first insertion portion 2 of the connector 100, and a second coaxial cable 300 is inserted into a second insertion portion 3 of the connector 100.

[0059] The first side wall protrusion 5 of the connector 100 comes into contact with the first outer conductor 202 of the first coaxial cable 200, electrically connecting the first side wall protrusion 5 of the connector 100 to the first outer conductor 202 of the first coaxial cable 200. By plating (e.g., gold) the first side wall protrusion 5 and the first outer conductor 202 in contact with the first side wall protrusion 5, the conductivity, i.e., electrical characteristics, are further improved. Furthermore, the inner wall 4 of the connector 100 comes into contact with the first outer conductor 202 of the first coaxial cable 200, electrically connecting the inner wall 4 of the connector 100 to the first outer conductor 202 of the first coaxial cable 200. By plating (e.g., gold) the inner wall 4 and the first outer conductor 202 in contact with the inner wall 4, the conductivity, i.e., electrical characteristics, are further improved. Furthermore, a tip portion 201-1 of a first center conductor 201 of the first coaxial cable 200 is inserted into a first insertion opening 203-1 of the pin 203, thereby electrically connecting the pin 203 and the first center conductor 201. Incidentally, the connector 100 and the first coaxial cable 200 may be fixed by soldering or the like and physically connected to each other.

[0060] The second side wall protrusion 8 of the connector 100 is fitted with the second outer conductor recess 305 of the second coaxial cable 300, electrically connecting the second side wall protrusion 8 of the connector and the second outer conductor 302 of the second coaxial cable 300. The second side wall protrusion 8 and the second outer conductor recess 305 are plated (e.g., gold plated) to further improve conductivity, i.e., electrical properties. This fitting structure makes it difficult for the second coaxial cable 300 to come loose from the connector 100.

[0061] The second outer conductor split end pieces 302-1 and 302-2 of the second coaxial cable 300 extend outward from the second outer conductor 302 (upper side in FIG. 2 ) and come into contact with the inner wall portion 7 of the connector 100, which is located between the side wall recess 6 of the connector 100 and the second side wall protrusion 8 of the connector 100, thereby electrically connecting the inner wall portion 7 of the connector 100 and the second outer conductor 302 of the second coaxial cable 300. The inner wall portion 7 and the second outer conductor split end pieces 302-1 and 302-2 are plated (e.g., gold plated) to further improve conductivity, i.e., electrical properties.

[0062] As described above, the second outer conductor split end pieces 302-1 and 302-2 have spring properties (elasticity) due to the slits, and as described above, they extend outward (upward in FIG. 2 ) from the second outer conductor 302. Therefore, the second outer conductor split end pieces 302-1 and 302-2 contact the inner wall portion 7 and the second side wall protrusion 8 of the connector 100 while applying pressure in the outward direction of the second outer conductor 302 (toward the inner wall of the connector 100). Therefore, the second coaxial cable 300 is even less likely to come out of the connector 100.

[0063] Furthermore, the second outer conductor 302 of the second coaxial cable 300 comes into contact with the inner wall 9 of the connector 100, which is on the second insertion portion 3 side and adjacent to the second side wall protrusion 8, thereby electrically connecting the inner wall 9 of the connector 100 and the second outer conductor 302 of the second coaxial cable 300. The inner wall 9 and the second outer conductor 302 in contact with the inner wall 4 are plated (e.g., gold plated), thereby further improving the conductivity, i.e., the electrical characteristics.

[0064] Then, the tip portion 301-1 of the second center conductor 301 of the second coaxial cable 300 is inserted into the first insertion opening 203-2 of the pin 203, and the pin 203 and the second center conductor 301 are electrically connected. Therefore, the first center conductor 201 (tip portion 201-1) of the first coaxial cable 200 and the second center conductor 301 (tip portion 301-1) of the second coaxial cable 300 are electrically connected via the pin 203. The tip portions 201-1 and 301-1 are plated (for example, gold plated), thereby further improving the conductivity, i.e., the electrical characteristics.

[0065] In addition, the connector 100 may be provided with a second side wall protrusion 8 instead of the first side wall protrusion 5, i.e., two second side wall protrusions 8, and the second coaxial cable 300 may be inserted into the first insertion portion 2 of the connector 100.

[0066] The above description of the first embodiment (Example 1 of the transmission line connection system) according to the present invention can be applied to the second to fourth embodiments of the present invention, which will be described later, unless there is any particular technical contradiction.

[0067] 3. Second Embodiment (Example 2 of Transmission Line Connection System) A transmission line connection system according to a second embodiment (second example of a transmission line connection system) of the present invention will be described with reference to FIGS. 3 and 4. FIG.

[0068] FIG. 3 is a diagram for explaining Example 2 of a transmission line connection system according to a second embodiment of the present invention, and more specifically, a diagram for explaining a transmission line connection system 2000. In FIG.

[0069] FIG. 4 is a diagram showing a configuration example of Example 2 of a transmission line connection system according to the second embodiment of the present invention, specifically, a configuration example of a transmission line connection system 2000.

[0070] Fig. 3 shows a state before the first coaxial cable 200 and the second coaxial cable 400 are electrically connected to the connector 100 in the transmission line connection system 2000. That is, Fig. 1 shows a state before the first coaxial cable 200 is inserted into the first insertion portion 2 of the connector 100, and a state before the second coaxial cable 400 is inserted into the second insertion portion 3 of the connector 100. Note that Fig. 3 shows the connector 100 in a side cross-sectional view, and the first coaxial cable 200 and the second coaxial cable 400 in a side view.

[0071] 4 also shows a state after the first coaxial cable 200 and the second coaxial cable 400 are electrically connected to the connector 100 in the transmission line connection system 2000. Note that in FIG. 4 as well, the connector 100 is shown in a side cross-sectional view, and the first coaxial cable 200 and the second coaxial cable 400 are shown in a side view.

[0072] As shown in Figures 3 and 4, the configuration of the connector 100 and the configuration of the first coaxial cable 200 are as described in section <2. First embodiment (Example 1 of transmission line connection system)>, so they will not be described here.

[0073] The second coaxial cable 400 has a second center conductor 401, a second insulator 404 disposed around the outer periphery of the second center conductor 401, and a second outer conductor 402 disposed around the outer periphery of the second insulator 404. The tip portion located at the tip of the second center conductor 401 may have a pointed shape, in which case the second center conductor 401 is inserted into the connector 100 without being inserted (connected) to a pin, thereby improving the fit between the second center conductor 401 and the connector 100, and the second center conductor 401 with such a pointed tip shape may be used.

[0074] The second outer conductor 402 of the second coaxial cable 400 has a second outer conductor recess 405 formed so as to be recessed toward the second insulator 404 (downward in FIG. 1 ) and go around the second insulator 404. The second outer conductor recess 405 has a substantially semicircular shape in a cross section when the second coaxial cable 400 is cut in the longitudinal direction of the second coaxial cable 400. The second outer conductor recess 405 may be made by scraping (cutting) the second outer conductor 402, or may be made by manually pressing the second outer conductor 402 (handmade) when inserting the second outer conductor 402 into the connector 100, for example.

[0075] A plurality of second outer conductor split end pieces 402-1 and 402-2 are formed at the tip end side (leftward in FIG. 1) of the second outer conductor 402, where slits are made in the longitudinal direction of the second coaxial cable 400. As shown in FIGS. 3 and 4, a second outer conductor split portion 402-3 is formed between the second outer conductor split end piece 402-1 and the second outer conductor split end piece 402-2. The second outer conductor split end pieces 402-1 and 402-2 have spring properties (elasticity) due to the slits formed therein as described above.

[0076] The second central conductor 401 may comprise annealed copper wire, the second insulator 404 may comprise a polymer material such as polyethylene, and the second outer conductor 402 may comprise braided copper wire.

[0077] Each of the second central conductor 401 and the second outer conductor 402 may contain at least one material selected from the group consisting of stainless steel, beryllium copper, phosphor bronze, and brass.

[0078] If the second central conductor 401 and the second outer conductor 402 each contain stainless steel, heat insulation and corrosion resistance are obtained, and if they contain beryllium copper or phosphor bronze, heat insulation is obtained. Furthermore, if the second central conductor 401 and the second outer conductor 402 each contain phosphor bronze or brass, they become non-magnetic.

[0079] As shown in FIG. 4, a first coaxial cable 200 is inserted into a first insertion portion 2 of the connector 100, and a second coaxial cable 400 is inserted into a second insertion portion 3 of the connector 100.

[0080] The first side wall protrusion 5 of the connector 100 comes into contact with the first outer conductor 202 of the first coaxial cable 200, electrically connecting the first side wall protrusion 5 of the connector 100 to the first outer conductor 202 of the first coaxial cable 200. By plating (e.g., gold) the first side wall protrusion 5 and the first outer conductor 202 in contact with the first side wall protrusion 5, the conductivity, i.e., electrical characteristics, are further improved. Furthermore, the inner wall 4 of the connector 100 comes into contact with the first outer conductor 202 of the first coaxial cable 200, electrically connecting the inner wall 4 of the connector 100 to the first outer conductor 202 of the first coaxial cable 200. By plating (e.g., gold) the inner wall 4 and the first outer conductor 202 in contact with the inner wall 4, the conductivity, i.e., electrical characteristics, are further improved. Furthermore, a tip portion 201-1 of a first center conductor 201 of the first coaxial cable 200 is inserted into a first insertion opening 203-1 of the pin 203, thereby electrically connecting the pin 203 and the first center conductor 201. Incidentally, the connector 100 and the first coaxial cable 200 may be fixed by soldering or the like and physically connected to each other.

[0081] The second side wall protrusion 8 of the connector 100 is fitted with the second outer conductor recess 405 of the second coaxial cable 400, electrically connecting the second side wall protrusion 8 of the connector and the second outer conductor 402 of the second coaxial cable 400. The second side wall protrusion 8 and the second outer conductor recess 405 are plated (e.g., gold plated) to further improve conductivity, i.e., electrical properties. This fitting structure makes it difficult for the second coaxial cable 400 to come loose from the connector 100.

[0082] The second outer conductor split end pieces 402-1 and 402-2 of the second coaxial cable 400 extend outward from the second outer conductor 402 (upper side in FIG. 4 ) and come into contact with the inner wall portion 7 of the connector 100, which is located between the side wall recess 6 of the connector 100 and the second side wall protrusion 8 of the connector 100, thereby electrically connecting the inner wall portion 7 of the connector 100 and the second outer conductor 402 of the second coaxial cable 400. The inner wall portion 7 and the second outer conductor split end pieces 402-1 and 402-2 are plated (e.g., gold plated) to further improve conductivity, i.e., electrical properties.

[0083] As described above, the second outer conductor split end pieces 402-1 and 402-2 have spring properties (elasticity) due to the slits, and as described above, they extend outward (upward in FIG. 4 ) from the second outer conductor 402, so that the second outer conductor split end pieces 402-1 and 402-2 come into contact with the inner wall 7 and the second side wall protrusion 8 of the connector 100 while applying pressure in the outward direction of the second outer conductor 402 (toward the inner wall of the connector 100). This makes it even more difficult for the second coaxial cable 400 to come out of the connector 100.

[0084] Furthermore, the second outer conductor 402 of the second coaxial cable 400 comes into contact with the inner wall 9 of the connector 100, which is on the second insertion portion 3 side and adjacent to the second side wall protrusion 8, thereby electrically connecting the inner wall 9 of the connector 100 and the second outer conductor 402 of the second coaxial cable 400. The inner wall 9 and the second outer conductor 402 in contact with the inner wall 9 are plated (e.g., gold plated), thereby further improving the conductivity, i.e., the electrical characteristics.

[0085] Then, the tip portion 401-1 of the second center conductor 401 of the second coaxial cable 400 is inserted into the first insertion opening 203-2 of the pin 203, and the pin 203 and the second center conductor 401 are electrically connected. Therefore, the first center conductor 201 (tip portion 201-1) of the first coaxial cable 200 and the second center conductor 401 (tip portion 401-1) of the second coaxial cable 400 are electrically connected via the pin 203. The tip portions 201-1 and 401-1 are plated (for example, gold plated), thereby further improving the conductivity, i.e., the electrical characteristics.

[0086] In addition, the connector 100 may be provided with a second side wall protrusion 8 instead of the first side wall protrusion 5, i.e., two second side wall protrusions 8, and the second coaxial cable 400 may be inserted into the first insertion portion 2 of the connector 100.

[0087] The above description of the second embodiment (Example 2 of the transmission line connection system) according to the present invention can be applied to the first embodiment according to the present invention described above and the third and fourth embodiments according to the present invention described below, unless there is any particular technical contradiction.

[0088] 4. Third Embodiment (Example of Connector Assembly) A connector assembly according to a third embodiment (an example of a connector assembly) of the present invention will be described with reference to FIG.

[0089] Figure 5 shows an example of the configuration of a connector assembly according to a third embodiment of the present invention, and in detail, Figure 5A is a plan view of a connector assembly 600 made up of a plurality of connectors 100, viewed from the first insertion portion 2 side of the connectors 100. And Figure 5B is a cross-sectional view taken along line ST shown in Figure 5A.

[0090] 5A, connector assembly 600 has a plurality of connectors 100 formed in a honeycomb pattern on a metallic circular plane (circular plate) having a diameter R when viewed from the first insertion portion 2 side. Although not shown, connector assembly 600 may have a plurality of connectors 100 formed in a matrix (including linear arrays in the left-right direction in FIG. 5 or linear arrays in the up-down direction in FIG. 5) on a rectangular plane (plate) when viewed from the first insertion portion 2 side.

[0091] As shown in Figure 5B, the connector 100 is arranged in a straight line in the left-right direction in Figure 5B, with the first insertion section 2 into which the first coaxial cable 200 is inserted being arranged on the upper side of Figure 5B, and the second insertion section 3 into which the second coaxial cable 300 or 400 is inserted being arranged on the lower side of Figure 5B.

[0092] The above description of the third embodiment of the present invention (an example of a connector assembly) can be applied to the first and second embodiments of the present invention described above and the fourth embodiment of the present invention described below, unless there is any particular technical contradiction.

[0093] 5. Fourth Embodiment (Example 3 of Transmission Line Connection System) A transmission line connection system according to a fourth embodiment (third example of a transmission line connection system) of the present invention will be described with reference to FIG.

[0094] FIG. 6 is a diagram showing a configuration example of Example 3 of a transmission line connection system according to the fourth embodiment of the present invention, and specifically, a diagram showing a configuration example of a transmission line connection system 3000.

[0095] 6 shows a state after two first coaxial cables 200 are inserted into the first insertion portions 2 of the two connectors 100, respectively, from top to bottom in Fig. 6, in the portion indicated by reference symbol U in Fig. 5B, and the two connectors 100 and the first coaxial cables 200 are electrically connected to each other, and also shows a state after two second coaxial cables 300 are inserted into the second insertion portions 3 of the two connectors 100, respectively, from bottom to top in Fig. 6, and the two connectors 100 and the two second coaxial cables 300 are electrically connected to each other. Although not shown, two second coaxial cables 400 may also be inserted into the second insertion portions 3 of the two connectors 100, respectively, from bottom to top.

[0096] In the transmission line connection system 3000, the first coaxial cable 200 can be electrically connected simultaneously to multiple connectors 100 that make up the connector assembly 600, thereby achieving further improvements in the connection reliability between the connector of the transmission line (such as a coaxial cable) and the coaxial cable, further improvements in electrical characteristics, and further density and miniaturization of the transmission line.

[0097] The above description of the fourth embodiment (third example of the transmission line connection system) according to the present invention can be applied to the first to third embodiments according to the present invention, unless there is any particular technical contradiction.

[0098] The present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the spirit of the present invention.

[0099] The present invention can have the following configurations. [1] A cable and a connector are provided. When the cable is inserted into the connector, The cable and the connector are mated to form a connector system. [2] the cable has a cable insertion portion; the connector has a connector insertion portion, the cable and the connector each have a structure that makes it difficult for the cable to come out of the connector when the cable insertion portion is inserted into the connector insertion portion; The connector system according to [1] is adapted to the structure. [3] The cable and the connector may further include a mating jig adapted to be mated with each other, the cable, the connector, and the mating jig each have a structure that makes it difficult for the cable to come out of the connector via the mating jig when the cable insertion portion is inserted into the connector insertion portion; A connector system according to [1] or [2] adapted to the structure.

[0100] [4] A cylindrical side wall portion; a first insertion portion formed at one end of the cylindrical side wall portion; a second insertion portion formed at the other end of the cylindrical side wall portion opposite to the one end of the cylindrical side wall portion; a first side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; a second side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; at least one sidewall recess provided on an inner wall of the cylindrical sidewall portion, recessed outward from the inner wall and formed around the inner wall; penetrates from the first insertion portion to the second insertion portion, The connector has, arranged in order from the first insertion portion side, the first sidewall protrusion, the at least one sidewall recess, and the second sidewall protrusion. [5] A connector as described in [4], wherein the length of the first side wall convex portion in the direction penetrating from the first insertion portion to the second insertion portion is greater than the length of the second side wall convex portion in the direction penetrating from the first insertion portion to the second insertion portion. [6] The connector according to [4] or [5], which is a superconductor.

[0101] [7] A plurality of connectors are provided. Each of the plurality of connectors A cylindrical side wall portion; a first insertion portion formed at one end of the cylindrical side wall portion; a second insertion portion formed at the other end of the cylindrical side wall portion opposite to the one end of the cylindrical side wall portion; a first side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; a second side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; at least one sidewall recess provided on an inner wall of the cylindrical sidewall portion, recessed outward from the inner wall and formed around the inner wall; penetrates from the first insertion portion to the second insertion portion, the first sidewall protrusion, the at least one sidewall recess, and the second sidewall protrusion are arranged in this order from the first insertion portion side, The connector assembly has the plurality of connectors formed in a honeycomb shape when viewed from the first insertion portion side. [8] Each of the plurality of connectors A connector assembly as described in [7], wherein the length of the first side wall convex portion in the direction penetrating from the first insertion portion to the second insertion portion is greater than the length of the second side wall convex portion in the direction penetrating from the first insertion portion to the second insertion portion. [9] The connector assembly according to [7] or [8], wherein each of the plurality of connectors is a superconductor.

[0102]

[10] a connector, a first coaxial cable, and a second coaxial cable; The connector: A cylindrical side wall portion; a first insertion portion formed at one end of the cylindrical side wall portion; a second insertion portion formed at the other end of the cylindrical side wall portion opposite to the one end of the cylindrical side wall portion; a first side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; a second side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; at least one sidewall recess provided on an inner wall of the cylindrical sidewall portion, recessed outward from the inner wall and formed around the inner wall; penetrates from the first insertion portion to the second insertion portion, the first sidewall protrusion, the at least one sidewall recess, and the second sidewall protrusion are arranged in this order from the first insertion portion side, The first coaxial cable a first central conductor, a first insulator disposed around the outer periphery of the first central conductor, and a first outer conductor disposed around the outer periphery of the first insulator; The second coaxial cable a second central conductor, a second insulator disposed around the outer periphery of the second central conductor, and a second outer conductor disposed around the outer periphery of the second insulator; the second outer conductor has a second outer conductor recess formed around the second insulator and recessed toward the second insulator; a plurality of split end pieces of the second outer conductor split in the longitudinal direction of the second coaxial cable are formed on the tip side of the second outer conductor; the first coaxial cable is inserted into the first insertion portion of the connector; the second coaxial cable is inserted into the second insertion portion of the connector; the first side wall protrusion of the connector and the first outer conductor of the first coaxial cable come into contact with each other, and the first side wall protrusion of the connector and the first outer conductor of the first coaxial cable are electrically connected to each other; the second outer conductor recess of the second coaxial cable is fitted into the second side wall protrusion of the connector, so that the second side wall protrusion of the connector and the second outer conductor of the second coaxial cable are electrically connected; a second outer conductor split end piece of the second coaxial cable extending outward from the second outer conductor of the connector and contacting an inner wall of the connector positioned between the at least one recess of the connector and the second side wall protrusion of the connector, thereby electrically connecting the inner wall of the connector and the second outer conductor of the second coaxial cable.

[11] Equipped with a pin, The pin has a first insertion opening and a second insertion opening opposite to the first insertion opening, the first central conductor of the first coaxial cable is inserted into the first insertion port, the second central conductor of the second coaxial cable is inserted into the second insertion port,

[10] The transmission line connection system described in

[10] , wherein the first center conductor of the first coaxial cable and the second center conductor of the second coaxial cable are electrically connected via the pin.

[0103]

[12] a connector assembly, a plurality of first coaxial cables, and a plurality of second coaxial cables; Each connector of the connector assembly is A cylindrical side wall portion; a first insertion portion formed at one end of the cylindrical side wall portion; a second insertion portion formed at the other end of the cylindrical side wall portion opposite to the one end of the cylindrical side wall portion; a first side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; a second side wall protrusion provided on an inner wall of the cylindrical side wall portion, protruding inward from the inner wall and surrounding the inner wall; at least one sidewall recess provided on an inner wall of the cylindrical sidewall portion, recessed outward from the inner wall and formed around the inner wall; penetrates from the first insertion portion to the second insertion portion, the first sidewall protrusion, the at least one sidewall recess, and the second sidewall protrusion are arranged in this order from the first insertion portion side, Each of the plurality of first coaxial cables comprises: a first central conductor, a first insulator disposed around the outer periphery of the first central conductor, and a first outer conductor disposed around the outer periphery of the first insulator; Each of the plurality of second coaxial cables comprises: a second insulator disposed on an outer periphery of the second central conductor; and a second outer conductor disposed on an outer periphery of the second insulator, the second outer conductor has a second outer conductor recess formed around the second insulator and recessed toward the second insulator; a plurality of split end pieces of the second outer conductor split in the longitudinal direction of the second coaxial cable are formed on the tip side of the second outer conductor; the respective first coaxial cables are inserted into the first insertion portions of the respective connectors; the respective second coaxial cables are inserted into the second insertion portions of the respective connectors; the first side wall protrusions of the respective connectors come into contact with the first outer conductors of the respective first coaxial cables, and the first side wall protrusions of the respective connectors are electrically connected to the first outer conductors of the respective first coaxial cables; the second side wall protrusions of the respective connectors are fitted into the second outer conductor recesses of the respective second coaxial cables, so that the second side wall protrusions of the respective connectors and the second outer conductors of the respective second coaxial cables are electrically connected; a second outer conductor split end piece of each of the second coaxial cables extending outward from the second outer conductor of each of the second coaxial cables and contacting an inner wall of each of the connectors positioned between the at least one recess of each of the connectors and the second side wall protrusion of each of the connectors, thereby electrically connecting the inner wall of each of the connectors and the second outer conductor of each of the second coaxial cables.

[13] A plurality of pins are provided, Each of the plurality of pins has a first insertion opening and a second insertion opening opposite the first insertion opening, the first central conductor of each of the first coaxial cables is inserted into the first insertion port; the second central conductors of the second coaxial cables are inserted into the second insertion ports;

[12] The transmission line connection system described in

[12] , wherein the first center conductor of the first coaxial cable and the second center conductor of the second coaxial cable are electrically connected via the pin.

[0104]

[14] A coaxial cable having a central conductor, an insulator disposed around the central conductor, and an outer conductor disposed around the insulator, the outer conductor has an outer conductor recess formed to be recessed toward the insulator and to surround the insulator, A coaxial cable in which a plurality of second outer conductor split end pieces split in the longitudinal direction of the coaxial cable are formed on the tip side of the outer conductor. [Explanation of symbols]

[0105] 1. A cylindrical side wall portion, 2. First insertion part, 3. Second insertion part, 4, 7, 9: Inner wall of connector (side wall), 5. First side wall protrusion, 6···Side wall recess, 8. Second side wall protrusion, 100···connector, 200···First coaxial cable, 201...first center conductor, 202: First outer conductor; 203···pin, 204...first insulator, 300, 400... second coaxial cable, 301, 401... second center conductor, 302, 402... second outer conductor, 302-1, 302-2, 402-1, 402-2...Second outer conductor split tip, 302-3, 402-3: Second outer conductor split section, 304, 404... Second insulator, 305, 405...second outer conductor recess, 600···Connector assembly, 1000, 2000, 3000... Transmission line connection system.

Claims

1. A cable and a connector are provided. When the cable is inserted into the connector, The cable and the connector are mated to form a connector system.

2. the cable has a cable insertion portion; the connector has a connector insertion portion, the cable and the connector each have a structure that makes it difficult for the cable to come out of the connector when the cable insertion portion is inserted into the connector insertion portion; 10. The connector system of claim 1 adapted to said structure.

3. The cable and the connector may further include a mating jig adapted to be mated with each other, the cable, the connector, and the mating jig each have a structure that makes it difficult for the cable to come out of the connector via the mating jig when the cable insertion portion is inserted into the connector insertion portion; 10. The connector system of claim 1 adapted to said structure.

4. A cylindrical side wall portion; a first insertion portion formed at one end of the cylindrical side wall portion; a second insertion portion formed at the other end of the cylindrical side wall portion opposite to the one end of the cylindrical side wall portion; a first side wall projection provided on an inner wall of the cylindrical side wall portion, the first side wall projection projecting inward from the inner wall and surrounding the inner wall; a second side wall projection provided on an inner wall of the cylindrical side wall portion, the second side wall projection projecting inward from the inner wall and surrounding the inner wall; at least one sidewall recess provided on an inner wall of the cylindrical sidewall portion, recessed outward from the inner wall and formed around the inner wall; penetrates from the first insertion portion to the second insertion portion, The connector has, arranged in order from the first insertion portion side, the first sidewall protrusion, the at least one sidewall recess, and the second sidewall protrusion.

5. 5. The connector of claim 4, wherein the length of the first side wall protrusion in the direction penetrating from the first insertion portion to the second insertion portion is greater than the length of the second side wall protrusion in the direction penetrating from the first insertion portion to the second insertion portion.

6. 5. The connector of claim 4, which is a superconductor.

7. A plurality of connectors are provided. Each of the plurality of connectors A cylindrical side wall portion; a first insertion portion formed at one end of the cylindrical side wall portion; a second insertion portion formed at the other end of the cylindrical side wall portion opposite to the one end of the cylindrical side wall portion; a first side wall projection provided on an inner wall of the cylindrical side wall portion, the first side wall projection projecting inward from the inner wall and surrounding the inner wall; a second side wall projection provided on an inner wall of the cylindrical side wall portion, the second side wall projection projecting inward from the inner wall and surrounding the inner wall; at least one sidewall recess provided on an inner wall of the cylindrical sidewall portion, recessed outward from the inner wall and formed around the inner wall; penetrates from the first insertion portion to the second insertion portion, the first sidewall protrusion, the at least one sidewall recess, and the second sidewall protrusion are arranged in this order from the first insertion portion side, The connector assembly has the plurality of connectors formed in a honeycomb shape when viewed from the first insertion portion side.

8. Each of the plurality of connectors 8. A connector assembly as described in claim 7, wherein the length of the first side wall protrusion in the direction penetrating from the first insertion portion to the second insertion portion is greater than the length of the second side wall protrusion in the direction penetrating from the first insertion portion to the second insertion portion.

9. 8. The connector assembly of claim 7, wherein each of said plurality of connectors is a superconductor.

10. a connector, a first coaxial cable, and a second coaxial cable; The connector: A cylindrical side wall portion; a first insertion portion formed at one end of the cylindrical side wall portion; a second insertion portion formed at the other end of the cylindrical side wall portion opposite to the one end of the cylindrical side wall portion; a first side wall projection provided on an inner wall of the cylindrical side wall portion, the first side wall projection projecting inward from the inner wall and surrounding the inner wall; a second side wall projection provided on an inner wall of the cylindrical side wall portion, the second side wall projection projecting inward from the inner wall and surrounding the inner wall; at least one sidewall recess provided on an inner wall of the cylindrical sidewall portion, recessed outward from the inner wall and formed around the inner wall; penetrates from the first insertion portion to the second insertion portion, the first sidewall protrusion, the at least one sidewall recess, and the second sidewall protrusion are arranged in this order from the first insertion portion side, The first coaxial cable a first central conductor, a first insulator disposed around the outer periphery of the first central conductor, and a first outer conductor disposed around the outer periphery of the first insulator; The second coaxial cable a second central conductor, a second insulator disposed around the outer periphery of the second central conductor, and a second outer conductor disposed around the outer periphery of the second insulator; the second outer conductor has a second outer conductor recess formed around the second insulator and recessed toward the second insulator; a plurality of split end pieces of the second outer conductor split in the longitudinal direction of the second coaxial cable are formed on the tip side of the second outer conductor; the first coaxial cable is inserted into the first insertion portion of the connector; the second coaxial cable is inserted into the second insertion portion of the connector; the first side wall protrusion of the connector and the first outer conductor of the first coaxial cable come into contact with each other, and the first side wall protrusion of the connector and the first outer conductor of the first coaxial cable are electrically connected to each other; the second outer conductor recess of the second coaxial cable is fitted into the second side wall protrusion of the connector, so that the second side wall protrusion of the connector and the second outer conductor of the second coaxial cable are electrically connected; a second outer conductor split end piece of the second coaxial cable extending outward from the second outer conductor of the connector and contacting an inner wall of the connector positioned between the at least one recess of the connector and the second side wall protrusion of the connector, thereby electrically connecting the inner wall of the connector and the second outer conductor of the second coaxial cable.

11. Equipped with a pin, The pin has a first insertion opening and a second insertion opening opposite to the first insertion opening, the first central conductor of the first coaxial cable is inserted into the first insertion port, the second central conductor of the second coaxial cable is inserted into the second insertion port, 11. The transmission line connection system according to claim 10, wherein the first center conductor of the first coaxial cable and the second center conductor of the second coaxial cable are electrically connected via the pin.

12. a connector assembly, a plurality of first coaxial cables, and a plurality of second coaxial cables; Each connector of the connector assembly is A cylindrical side wall portion; a first insertion portion formed at one end of the cylindrical side wall portion; a second insertion portion formed at the other end of the cylindrical side wall portion opposite to the one end of the cylindrical side wall portion; a first side wall projection provided on an inner wall of the cylindrical side wall portion, the first side wall projection projecting inward from the inner wall and surrounding the inner wall; a second side wall projection provided on an inner wall of the cylindrical side wall portion, the second side wall projection projecting inward from the inner wall and surrounding the inner wall; at least one sidewall recess provided on an inner wall of the cylindrical sidewall portion, recessed outward from the inner wall and formed around the inner wall; penetrates from the first insertion portion to the second insertion portion, the first sidewall protrusion, the at least one sidewall recess, and the second sidewall protrusion are arranged in this order from the first insertion portion side, Each of the plurality of first coaxial cables comprises: a first central conductor, a first insulator disposed around the outer periphery of the first central conductor, and a first outer conductor disposed around the outer periphery of the first insulator; Each of the plurality of second coaxial cables comprises: a second insulator disposed on an outer periphery of the second central conductor; and a second outer conductor disposed on an outer periphery of the second insulator, the second outer conductor has a second outer conductor recess formed around the second insulator and recessed toward the second insulator; a plurality of split end pieces of the second outer conductor split in the longitudinal direction of the second coaxial cable are formed on the tip side of the second outer conductor; the respective first coaxial cables are inserted into the first insertion portions of the respective connectors; the respective second coaxial cables are inserted into the second insertion portions of the respective connectors; the first side wall protrusions of the respective connectors come into contact with the first outer conductors of the respective first coaxial cables, and the first side wall protrusions of the respective connectors are electrically connected to the first outer conductors of the respective first coaxial cables; the second side wall protrusions of the respective connectors are fitted into the second outer conductor recesses of the respective second coaxial cables, so that the second side wall protrusions of the respective connectors and the second outer conductors of the respective second coaxial cables are electrically connected; the second outer conductor split end pieces of the second coaxial cables extend in an outward direction of the second outer conductor of the respective second coaxial cables and contact an inner wall of the respective connector that is positioned between the at least one recess of the respective connector and the second side wall protrusion of the respective connector, thereby electrically connecting the inner wall of the respective connector and the second outer conductor of the respective second coaxial cables.

13. A plurality of pins are provided, Each of the plurality of pins has a first insertion opening and a second insertion opening opposite the first insertion opening, the first central conductors of the first coaxial cables are inserted into the first insertion openings, the second central conductors of the second coaxial cables are inserted into the second insertion ports; 13. The transmission line connection system according to claim 12, wherein the first center conductor of the first coaxial cable and the second center conductor of the second coaxial cable are electrically connected via the pin.

14. A coaxial cable having a central conductor, an insulator disposed around the central conductor, and an outer conductor disposed around the insulator, the outer conductor has an outer conductor recess formed to be recessed toward the insulator and to surround the insulator, A coaxial cable, wherein a plurality of second outer conductor split end pieces split in the longitudinal direction of the coaxial cable are formed on the tip side of the outer conductor.

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