Coaxial cable connector

Abstract

The invention provides a coaxial cable connector. The coaxial cable connector comprises a connector for relaying a cable. The connector includes: a contact including a conductor; an inner housing including an insulator and supporting the contact; and an impedance regulator having a portion incorporated in the inner housing and including a conductor. The impedance regulator covers an exposed portion of a cable core wire connected to the contact member, the exposed portion being exposed from the inner housing.

Description

Technical Field

[0001] This case involves a coaxial cable connector.

[0002] In automotive coaxial connectors, adjusting impedance to improve transmission characteristics is the key to improving performance. In relay connector devices that relay cables, it is important to control the impedance of the space layer in the crimping portion between the contact and the copper wire. Background Art

[0003] In the relay connector device disclosed in Japanese Unexamined Patent Application Publication No. 2020-107567, for example, a space layer is formed in the crimping portion between the contact and the copper wire. Such a space layer containing air causes an increase in impedance and deteriorates matching with the designed impedance. Summary of the invention

[0004] The present invention is proposed to solve the above problems, and its purpose is to provide a coaxial cable connector with improved impedance matching.

[0005] According to one aspect of the present case, the coaxial cable connector includes a connector for a relay cable, the connector including: a contact piece including a conductor; an insulator body including an insulator and supporting the contact piece; and an impedance adjuster, the impedance adjuster having a portion that is incorporated into the insulator body and includes a portion that includes a conductor, wherein the impedance adjuster covers an exposed portion of a core wire of a cable connected to the contact piece, the exposed portion being exposed from the insulator body.

[0006] In the above-mentioned coaxial cable connector, the connector may further include: a GND shell including a conductor; the contact piece, the insulator body, and the impedance adjuster are arranged in the GND shell; the impedance adjuster is arranged in a space layer formed between the exposed portion and the GND shell.

[0007] In the above coaxial cable connector, the impedance adjuster is tubular, and its central axis is located at the contact piece and the core wire.

[0008] In the above-mentioned coaxial cable connector, the cable may include: the core wire, including the conductor; a covering layer, a portion of which covers the core wire and includes the insulator covering layer; a shielding layer, a portion of which covers the covering layer and includes the conductor covering layer; and an outer cover, a portion of which covers the shielding layer and includes the insulator; the impedance adjuster may cover an end portion of the covering layer.

[0009] In the above coaxial cable connector, the impedance adjuster may be assembled into the insulator body by insert molding.

[0010] In the above coaxial cable connector, the impedance adjuster may be assembled into the insulator body by being press-fitted into the insulator body.

[0011] In the above coaxial cable connector, the impedance adjuster may be electrically connected to the GND shell.

[0012] In the above coaxial cable connector, the impedance adjuster is electrically insulated from the GND shell, the contact, and the core wire.

[0013] According to one aspect of the present invention, a coaxial cable connector is a coaxial cable connector including a first connector and a second connector for relaying a first cable and a second cable. The first connector includes: a first contact including a conductor and a protrusion at one end; a first insulator body including an insulator and supporting the first contact; and a first impedance adjuster having a portion incorporated in the first insulator and including a conductor, the first impedance adjuster covering an exposed portion of a first core wire of the first cable connected to the other end of the first contact, the exposed portion being exposed from the first insulator; the second connector includes: a second contact including a conductor and a recess at one end; a second insulator body including an insulator and supporting the second contact; and a second impedance adjuster having a portion incorporated in the second insulator and including a conductor, the second impedance adjuster covering an exposed portion of a second core wire of the second cable connected to the other end of the second contact, the exposed portion being exposed from the second insulator; and the protrusion of the first contact is engaged with the recess of the second contact.

[0014] According to the present invention, a coaxial cable connector with improved impedance matching is provided.

[0015] The above and other objects, features and advantages of the present invention will become more fully understood from the detailed description and accompanying drawings given below, which are given by way of illustration only and thus should not be construed as limiting the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 : is a cross-sectional view showing a relay connector device according to a comparative example.

[0017] Figure 2 is a perspective view showing a connector in a relay connector device according to a comparative example.

[0018] Figure 3 is a perspective view showing a connector in a relay connector device according to a comparative example.

[0019] Figure 4is an exploded perspective view showing each member constituting a connector in a relay connector device according to a comparative example.

[0020] Figure 5 is a perspective view showing an inner housing in a relay connector device according to a comparative example.

[0021] Figure 6 is an exploded perspective view showing each member constituting a connector in a relay connector device according to a comparative example.

[0022] Figure 7 is a perspective view showing an inner housing in a relay connector device according to a comparative example.

[0023] Figure 8 2 is a cross-sectional view showing a connection operation of a connector in a relay connector device according to a comparative example.

[0024] Fig. 9 : is a schematic diagram showing a related relay connector device.

[0025] Fig.10 : is a schematic diagram showing a related relay connector device.

[0026] Fig.11 is a cross-sectional view showing a relay connector device according to the first embodiment.

[0027] Fig.12 is a perspective view showing a connector in the relay connector device according to the first embodiment.

[0028] Fig.13 is a perspective view showing a connector in the relay connector device according to the first embodiment.

[0029] Fig.14 is an exploded perspective view showing each member constituting the connector in the relay connector device according to the first embodiment.

[0030] Fig.15 1 is a perspective view showing an inner housing and an impedance adjuster in the relay connector device according to the first embodiment.

[0031] Fig.16 is an exploded perspective view showing each member constituting the connector in the relay connector device according to the first embodiment.

[0032] Fig.17 is a perspective view showing an inner housing and an impedance adjuster in the relay connector device according to the first embodiment.

[0033] Fig.18 is a cross-sectional view showing a connecting operation of the connector in the relay connector device according to the first embodiment.

[0034] Fig.19 : is a graph showing impedance in the relay connector device according to the first embodiment, in which the horizontal axis represents time and the vertical axis represents impedance. DETAILED DESCRIPTION

[0035] The specific structure of the present embodiment is described below with reference to the accompanying drawings. The following description only shows the preferred embodiment of the present case, and the scope of the present case is not limited to the following embodiment. In the following description, the same reference numerals are given to substantially the same elements. For the clarity of the drawings, some reference numerals and hatching are omitted.

[0036] The coaxial cable connector of the present embodiment is described. Below, a relay connector device for relaying a cable is described as an example of a coaxial cable connector according to the present embodiment. It should be noted that the coaxial cable connector according to the present embodiment is not limited to a relay connector device, and may include other connector devices, such as a coaxial connector device in which a cable is engaged with a circuit board, as long as it is configured to connect a coaxial cable. Before describing the relay connector device according to the first embodiment, a relay connector device according to a comparative example will be described for comparison. This will clarify the features of the relay connector device according to the first embodiment.

[0037] <Comparative Example>

[0038] A relay connector device according to a comparative example will be described below. Figure 1 2 is a cross-sectional view showing a relay connector device 10 according to a comparative example. Figure 2 1 is a perspective view showing a connector 100 in the relay connector device 10 according to a comparative example. Figure 3 2 is a perspective view showing a connector 200 in the relay connector device 10 according to a comparative example. Figures 1 to 3 It should be noted that the relay connector device 10 can be used separately from the outer shell.

[0039] like Figures 1 to 3 As shown, the relay connector device 10 according to the comparative example includes a connector 100 and a connector 200. The connector 100 is, for example, a male-side connector 100, and the connector 200 is, for example, a female-side connector 200. The connector 100 is connected to one end of a cable 190. The connector 200 is connected to one end of a cable 290. The connector 100 is connected to the connector 200. Thus, the relay connector device 10 relays the cable 190 and the cable 290.

[0040] For the convenience of explaining the relay connector device 10 and the relay connector device 20 to be described later, an xyz orthogonal coordinate axis system is used. For example, the axial direction coaxial with the relay connector device 10 and the like is referred to as the x-axis direction. When connecting the connector 100 and the connector 200, the direction in which the male-side connector 100 faces the female-side connector 200 is referred to as the +x-axis direction. The two directions orthogonal to the x-axis are referred to as the y-axis direction and the z-axis direction.

[0041] <Male-side connector>

[0042] The male-side connector 100 will be described below. Figure 4 It is an exploded perspective view showing each member constituting the connector 100 in the relay connector device 10 according to the comparative example. Figure 5 It is a perspective view showing the inner housing 130 in the relay connector device 10 according to the comparative example. As Figure 1 to Figure 2 and Figures 4 to 5 shown, the connector 100 includes a GND housing 110, a GND housing 120, an inner housing 130, a contact 140, a sleeve 150, and an outer housing 180. Each member will be described below.

[0043] <GND housing>

[0044] The GND housing 110 and the GND housing 120 are made of a conductor as a material. For example, the GND housing 110 and the GND housing 120 are made of metal as a material. It should be noted that the GND housing 110 and the GND housing 120 may be made of a material other than metal as long as it contains a conductor. The GND housing 110 and the GND housing 120 are electrically connected to the ground potential.

[0045] The GND housing 110 and the GND housing 120 are tubular. For example, the GND housing 110 and the GND housing 120 have a cylindrical shape. The GND housing 110 and the GND housing 120 are arranged with their central axes along the x-axis direction. The central axes of the GND housing 110 and the GND housing 120 coincide with each other. The GND housing 110 is provided on the +x-axis direction side of the GND housing 120. The GND housing 110 may partially overlap the GND housing 120. For example, a part of the -x-axis direction side of the GND housing 110 overlaps a part of the +x-axis direction side of the GND housing 120. The GND housing 110 and the GND housing 120 are integrated and have a cylindrical shape.

[0046] The inner housing 130 and the contact 140 are disposed inside the GND shell 110 and the GND shell 120. The sleeve 150 and a portion of the cable 190 may be disposed inside the GND shell 120. The inner housing 130 may be press-fitted into the inside of the GND shell 110.

[0047] The end of the GND shell 110 on the +x-axis direction side is disposed close to the end of the inner shell 130 on the +x-axis direction side. The position of the end of the GND shell 110 on the +x-axis direction side on the x-axis may overlap with the position of the end of the inner shell 130 on the +x-axis direction side on the x-axis. The end of the GND shell 120 on the -x-axis direction side is located above the outer cover 194 of the cable 190. The end of the GND shell 120 on the -x-axis direction side is disposed close to the end of the sleeve 150 on the -x-axis direction side. For example, the position of the end of the GND shell 120 on the -x-axis direction side on the x-axis may overlap with the position of the end of the sleeve 150 on the -x-axis direction side on the x-axis.

[0048] <Inner Shell>

[0049] The inner housing 130 includes an insulator as a material. The inner housing 130 is also referred to as an insulator body. For example, the inner housing 130 includes a resin as a material. It should be noted that the inner housing 130 may also include a material other than a resin as long as it includes an insulator.

[0050] The inner housing 130 is tubular. For example, the inner housing 130 has a cylindrical shape. The inner housing 130 is configured in a manner that its central axis is along the x-axis direction. The inner housing 130 is disposed inside the GND shell 110. The contact 140 is disposed in the inner housing 130. Therefore, the inner housing 130 supports the contact 140. The contact 140 disposed in the inner housing 130 may be press-fitted into the inner housing 130.

[0051] The inner housing 130 has a recess 131 on its end surface on the +x-axis direction side. The end of the contact 140 on the +x-axis direction side protrudes from the bottom surface of the recess 131. One end of the contact 140 on the +x-axis direction side has a protrusion 141. The side wall of the recess 131 of the inner housing 130 surrounds the end of the contact 140 on the +x-axis direction side.

[0052] The end of the inner housing 130 on the -x-axis side is close to the end of the contact 140 on the -x-axis side. For example, the position of the end of the inner housing 130 on the -x-axis side on the x-axis may coincide with the position of the other end of the contact 140 on the -x-axis side on the x-axis. The core wire 191 of the cable 190 is connected to the end of the contact 140 on the -x-axis side. The connection portion between the contact 140 and the core wire 191 of the cable 190 may be provided inside the inner housing 130.

[0053] <Contact>

[0054] The contact 140 includes a conductor as a material. For example, the contact 140 includes a metal as a material. It should be noted that the contact 140 may also include a material other than a metal as long as it includes a conductor. The contact 140 has a function as a transmission path for a high-frequency signal, for example.

[0055] The contact 140 is in the shape of a rod. The contact 140 is arranged in such a manner that its central axis is along the x-axis direction. The contact 140 has a protrusion 141 at one end on the +x-axis side. The contact 140 is arranged inside the inner housing 130. The other end on the -x-axis side of the contact 140 is connected to the core wire 191 of the cable 190. The protrusion 141 at one end on the +x-axis side of the contact 140 is connected to the contact 240 of the connector 200 on the female side. The protrusion 141 of the contact 140 has a protruding shape so as to fit into the recess 241 of the contact 240.

[0056] <Casing>

[0057] The sleeve 150 includes a conductor as a material. For example, the sleeve 150 includes a metal as a material. It should be noted that the sleeve 150 may also include a material other than a metal as long as it includes a conductor.

[0058] The sleeve 150 is tubular. For example, the sleeve 150 has a cylindrical shape. The sleeve 150 is arranged in a manner that its central axis is along the x-axis direction. The sleeve 150 includes a cylindrical first portion 151 and a cylindrical second portion 152. The first portion 151 is connected to the second portion 152 in parallel in the x-axis direction. The first portion 151 is arranged on the +x-axis direction side of the second portion 152. The outer diameter of the first portion 151 is smaller than the outer diameter of the second portion 152. The inner diameter of the first portion 151 is smaller than the inner diameter of the second portion 152.

[0059] The first portion 151 is located inside the GND shell 120. The first portion 151 covers the shielding layer 193 exposed from one end of the outer cover 194 of the cable 190. The second portion 152 covers the outer cover 194 of the cable 190. The connection portion between the first portion 151 and the second portion 152 is located near the end of the outer cover 194 on the +x axis direction side.

[0060] <Outer shell>

[0061] The outer shell 180 includes an insulator as a material. For example, the outer shell 180 includes a resin as a material. It should be noted that the outer shell 180 may also include a material other than a resin as long as it includes an insulator.

[0062] The outer shell 180 is tubular. For example, the outer shell 180 has a square tube shape. The outer shell 180 is configured in such a way that its central axis is along the x-axis direction. The components of the GND shell 110, the GND shell 120, the inner shell 130, the contact 140 and the sleeve 150 are installed inside the outer shell 180.

[0063] <Cable>

[0064] The structure of the cable 190 is described below. The cable 190 extends in one direction and is flexible. The cable 190 includes a core wire 191, a coating layer 192, a shielding layer 193, and an outer cover 194. The core wire 191, the coating layer 192, the shielding layer 193, and the outer cover 194 are arranged in concentric layers. These components are stacked concentrically with the core wire 191 as the center. When the cable 190 extends in the x-axis direction, these components are stacked concentrically with the x-axis direction as the central axis. The coating layer 192 covers the side of the core wire 191. The shielding layer 193 covers the side of the coating layer 192. The outer cover 194 covers the side of the shielding layer 193.

[0065] The core wire 191 includes a conductor as a material. The core wire 191 has a linear shape. The core wire 191 may include, for example, a copper wire. It should be noted that the core wire 191 may also include a material other than a copper wire as long as it includes a linear conductor. A portion of the core wire 191 on the +x-axis side protrudes from an end portion of the cladding layer 192 on the +x-axis side.

[0066] The covering layer 192 includes an insulator as a material. For example, the covering layer 192 includes a resin as a material. It should be noted that the covering layer 192 may also include a material other than a resin, as long as it includes an insulator. The covering layer 192 is tubular. The covering layer 192 has a portion covering the side surface of the core wire 191. The end of the covering layer 192 on the +x-axis direction side may also be a section. A portion of the covering layer 192 on the +x-axis direction side may also be exposed from the end of the shielding layer 193 on the +x-axis direction side.

[0067] The shielding layer 193 includes a conductor as a material. For example, the shielding layer 193 may include a metal. It should be noted that the shielding layer 193 may also include a material other than a metal, as long as it includes a conductor. The shielding layer 193 is tubular. The shielding layer 193 has a portion covering the side of the coating layer 192. The end of the +x-axis direction side of the shielding layer 193 is folded toward the -x-axis direction side. Specifically, the end of the +x-axis direction side of the shielding layer 193 is folded toward the -x-axis direction side along the edge of the +x-axis direction side of the first part 151 of the sleeve 150. The end of the +x-axis direction side of the folded shielding layer 193 is connected to the inner surface of the GND shell 120. Therefore, the shielding layer 193 is electrically connected to the ground potential. A portion of the +x-axis direction side of the shielding layer 193 can be exposed from the end of the +x-axis direction side of the outer cover 194.

[0068] The outer cover 194 includes an insulator as a material. For example, the outer cover 194 may include a resin. The outer cover 194 may also include a material other than a resin as long as it includes an insulator. The outer cover 194 is tubular. The outer cover 194 has a portion covering the side of the shielding layer 193. The end of the outer cover 194 on the +x-axis direction side may also be a cut surface. A portion of the outer cover 194 on the +x-axis direction side may be covered by at least one of the sleeve 150 and the GND shell 120.

[0069] <Female connector>

[0070] The female-side connector 200 will be described below. Figure 6 1 is an exploded perspective view showing each member constituting the connector 200 in the relay connector device 10 according to the comparative example. Figure 7 2 is a perspective view showing an inner housing 230 in a relay connector device 10 according to a comparative example. Figure 1 , Figure 3 and Figure 6 to Figure 7 As shown, the connector 200 includes a GND shell 210 , a GND shell 220 , an inner shell 230 , a contact 240 , a sleeve 250 and an outer shell 280 .

[0071] In the case of the connector 100, the cable 190 is located on the -x axis direction side of the connector 100, while in the case of the connector 200, the cable 290 is located on the +x axis direction side of the connector 200. In addition, the basic structures and functions of the GND housing 210, the GND housing 220, the inner housing 230, the contact 240, the sleeve 250, and the outer housing 280 of the connector 200 are the same as those of the GND housing 110, the GND housing 120, the inner housing 130, the contact 140, the sleeve 150, and the outer housing 180 of the connector 100, respectively.

[0072] <GND housing>

[0073] The GND housing 210 is provided on the -x axis direction side of the GND housing 220. The inner housing 230 and the contact 240 are provided inside the GND housing 210 and the GND housing 220. The sleeve 250 and the cable 290 may be provided inside the GND housing 220. The inner housing 230 may be press-fitted into the inside of the GND housing 210.

[0074] The end portion on the -x axis direction side of the GND housing 210 is disposed close to the end portion on the -x axis direction side of the inner housing 230. The position of the end portion on the -x axis direction side of the GND housing 210 on the x axis may coincide with the position of the end portion on the -x axis direction side of the inner housing 230 on the x axis. The end portion on the +x axis direction side of the GND housing 220 is located above the outer cover 294 of the cable 290. The end portion on the +x axis direction side of the GND housing 220 is disposed close to the end portion on the +x axis direction side of the sleeve 250. For example, the position of the end portion on the +x axis direction side of the GND housing 220 on the x axis may coincide with the position of the end portion on the +x axis direction side of the sleeve 250 on the x axis.

[0075] <Inner housing>

[0076] The inner housing 230 is provided inside the GND housing 210. The contact 240 is provided inside the inner housing 230. Therefore, the contact 240 is located inside the GND housing 210. The inner housing 230 supports the contact 240.

[0077] The inner housing 230 includes a first portion 231 and a second portion 232. The first portion 231 is disposed on the -x-axis side of the second portion 232. The first portion 231 and the second portion 232 have a cylindrical shape, and the central axis thereof coincides with the central axis of the inner housing 230. The outer diameter of the first portion 231 is smaller than the outer diameter of the second portion 232. The first portion 231 is engaged with the recess 131 of the inner housing 130 of the connector 100. When the first portion 231 is engaged with the recess 131, the protrusion 141 of the contact 140 of the connector 100 is engaged with the recess 241 of the contact 240 of the connector 200.

[0078] The end of the inner shell 230 on the -x-axis direction side is the end face of the first part 231 on the -x-axis direction side. The end of the inner shell 230 on the -x-axis direction side is arranged close to the end of the GND shell 210 on the -x-axis direction side. For example, the position of the end of the inner shell 230 on the -x-axis direction side on the x-axis may coincide with the position of the end of the GND shell 210 on the -x-axis direction side on the x-axis. The recess 241 on the -x-axis direction side of the contact 240 is arranged inside the first part 231.

[0079] The end of the inner housing 230 on the +x-axis direction side is disposed close to the end of the contact 240 on the +x-axis direction side. For example, the position of the end of the inner housing 230 on the +x-axis direction side on the x-axis may coincide with the position of the other end of the contact 240 on the +x-axis direction side on the x-axis. The core wire 291 of the cable 290 is connected to the end of the contact 240 on the +x-axis direction side. The connection portion between the contact 240 and the core wire 291 of the cable 290 may be disposed inside the inner housing 230.

[0080] <Contact>

[0081] The contact 240 has a recess 241 at one end on the -x-axis direction side. The contact 240 is disposed in the inner housing 230. The end of the contact 240 on the +x-axis direction side is connected to the core wire 291 of the cable 290. The protrusion 141 of the contact 140 is fitted into the recess 241 of the contact 240.

[0082] <Casing>

[0083] The sleeve 250 includes a cylindrical first portion 251 and a cylindrical second portion 252. The first portion 251 is disposed on the -x-axis direction side of the second portion 252. The outer diameter of the first portion 251 is smaller than the outer diameter of the second portion 252. The inner diameter of the first portion 251 is smaller than the inner diameter of the second portion 252.

[0084] The first portion 251 is located inside the GND shell 220. The first portion 251 covers the shielding layer 293 exposed from one end of the outer cover 294 of the cable 290. The second portion 252 covers the outer cover 294 of the cable 290. Therefore, the connection portion between the first portion 251 and the second portion 252 is located near the end of the outer cover 294.

[0085] <Cable>

[0086] The cable 290 includes a core wire 291, a coating layer 292, a shielding layer 293, and an outer cover 294. The structures and functions of the core wire 291, the coating layer 292, the shielding layer 293, and the outer cover 294 in the cable 290 are respectively the same as the structures and functions of the core wire 191, the coating layer 192, the shielding layer 193, and the outer cover 194 in the cable 190. However, it should be noted that the direction in which the core wire 291 is connected to the contact 240, the direction of the end face of the coating layer 292 having a cut surface, the direction of the end of the shielding layer 293 and the direction of its folding, the direction of the end face of the outer cover 294, etc. are opposite to those in the cable 190.

[0087] Next, a connection operation of the relay connector device 10 according to the comparative example will be described. Figure 8 1 is a cross-sectional view showing a connection operation of the connector 100 and the connector 200 in the relay connector device according to the comparative example. Figure 1 and Figure 8 As shown, in the relay connector device 10 according to the comparative example, the connector 100 and the connector 200 are opposite to each other. Then, the protrusion 141 of the contact 140 is engaged with the recess 241 of the contact 240. Thus, a transmission path of a high-frequency signal is formed between the contact 140 and the contact 240. At the same time, the first portion 231 of the inner housing 230 can be engaged with the recess 131 of the inner housing 130. In addition, the GND shell 110 and the GND shell 210 are in contact with each other. Thus, a shield covering the high-frequency signal transmission path is formed.

[0088] <Problems in Comparative Example>

[0089] In the relay connector device 10, in a region from a connection portion between the other end portion on the -x-axis side of the contact 140 and the end portion on the +x-axis side of the core wire 191 to an end portion of the coating layer 192 on the +x-axis side of the cable 190, a space layer 195 is formed between the core wire 191 and the GND shell 110 and the GND shell 120. Specifically, the space layer 195 is formed between an exposed portion of the core wire 191 connected to the contact 140 and the GND shell 110 and the GND shell 120, and the exposed portion of the core wire 191 is exposed from the inner shell 130 and the coating layer 192.

[0090] Furthermore, in a region from a connection portion between the other end portion of the contact 240 on the +x-axis direction side and the end portion of the core wire 291 on the -x-axis direction side to an end portion of the coating layer 292 on the -x-axis direction side of the cable 290, a space layer 295 is formed between the core wire 291 and the GND shell 210 and the GND shell 220. Specifically, the space layer 295 is formed between an exposed portion of the core wire 291 connected to the contact 240 and the GND shell 210 and the GND shell 220, and the exposed portion of the core wire 291 is exposed from the inner shell 230 and the coating layer 292.

[0091] As described above, the space layer 195 and the space layer 295 containing air are formed near the connection portion of the contact 140 and the contact 240. Due to the presence of the space layer 195 and the space layer 295, the impedance of the relay connector device 10 is increased. This makes it difficult to improve the matching with the designed impedance. One method of reducing the impedance near the space layer 195 and the space layer 295 is, for example, to deform the GND shell 120 and the GND shell 220 so that it is closer to the core wire 191 and the core wire 291.

[0092] Fig. 9 and Fig.10 2 is a schematic diagram showing a related relay connector device 20. Fig. 9 As shown, in the related relay connector device 20, a portion of the cross section of the GND shell 21 has a concave shape. As a result, the GND shell 21 is closer to the core wire 22. This can improve impedance matching. However, as Fig.10As shown, if the GND shell 21 is in a concave shape, when the internal insulator 23 is inserted into the GND shell 21 for assembly, the internal insulator 23 contacts the concave portion of the GND shell 21, making it difficult to assemble the related relay connector device 20. This prevents the core wire 22 located between the internal insulator 23 and the cable 29 from approaching the GND shell 21. Therefore, in the related relay connector device 20, the improvement of impedance matching is not achieved.

[0093] <First Embodiment>

[0094] The relay connector device 30 according to the first embodiment is described below. This embodiment does not adopt the method of bringing the GND shell 110 and the like close to the core wire 191 and the core wire 291 to reduce the impedance of the core wire 191 and the core wire 291 close to the space layer 195 and the space layer 295. Instead, this embodiment incorporates an impedance adjuster into the inner housing 130 and the inner housing 230. The impedance of the relay connector device can thus be adjusted.

[0095] Fig.11 is a cross-sectional view showing a relay connector device 30 according to the first embodiment. Fig.12 : is a perspective view showing the connector 300 in the relay connector device 30 according to the first embodiment. Fig.13 4 is a perspective view showing the connector 400 in the relay connector device 30 according to the first embodiment. Figures 11 to 13 It should be noted that the relay connector device 30 can be used separately from the outer shell.

[0096] like Figures 11 to 13 As shown, the relay connector device 30 of this embodiment includes a connector 300 and a connector 400. The connector 300 is, for example, a male-side connector 300, and the connector 400 is, for example, a female-side connector 400. The connector 300 is connected to one end of a cable 390. The connector 400 is connected to one end of a cable 490. The connector 300 is connected to the connector 400. Thus, the relay connector device 30 relays the cable 390 and the cable 490.

[0097] <Male connector>

[0098] Fig.14 1 is an exploded perspective view showing each member constituting the connector 300 in the relay connector device 30 according to the first embodiment. Fig.15 3 is a perspective view showing the inner housing 330 and the impedance adjuster 360 in the relay connector device 30 according to the first embodiment. Fig.15 In the figure, the inner shell 330 is shown as transparent. Figure 11 to Figure 12 as well as Figure 14 to Figure 15As shown, the connector 300 includes a GND housing 310, an inner housing 330, a contact 340, a sleeve 350, an impedance regulator 360, an EMI housing 370, and an outer housing 380. The basic structures and functions of the GND housing 310, the inner housing 330, the contact 340, the sleeve 350, and the outer housing 380 in the connector 300 are the same as those of the GND housing 110 and the GND housing 120, the inner housing 130, the contact 140, the sleeve 150, and the outer housing 180 in the connector 100, respectively.

[0099] <GND housing>

[0100] The GND housing 310 corresponds to the integrated combination of the GND housing 110 and the GND housing 120 in the connector 100. The inner housing 330, the contact 340, and the impedance regulator 360 are disposed inside the GND housing 310. Further, a part of the sleeve 350 and the cable 390 is disposed inside the GND housing 310. The inner housing 330 can be press-fitted into the inside of the GND housing 310.

[0101] The end on the +x-axis direction side of the GND housing 310 is disposed close to the end on the +x-axis direction side of the inner housing 330. On the other hand, the end on the -x-axis direction side of the GND housing 310 is located above the outer cover 394 of the cable 390. The position of the end on the -x-axis direction side of the GND housing 310 on the x-axis may coincide with the position of the end on the -x-axis direction side of the sleeve 350 on the x-axis.

[0102] <Inner housing>

[0103] As Fig.15 shown, a part of the impedance regulator 360 is incorporated into the inner housing 330. For example, a part of the +x-axis direction side of the impedance regulator 360 is incorporated into a part of the -x-axis direction side of the inner housing 330.

[0104] The inner housing 330 is disposed inside the GND housing 310. The contact 340 is disposed inside the inner housing 330. The inner housing 330 supports the contact 340. The end face on the +x-axis direction side of the inner housing 330 has a recess 331. One end on the +x-axis direction side of the contact 340 protrudes from the bottom surface of the recess 331. One end on the +x-axis direction side of the contact 340 has a protrusion 341. The side wall of the recess 331 of the inner housing 330 surrounds the protrusion 341 on the +x-axis direction side of the contact 340.

[0105] The end of the inner housing 330 on the -x-axis direction side is disposed close to the end of the contact 340 on the -x-axis direction side. The position of the end of the inner housing 330 on the -x-axis direction side on the x-axis may coincide with the position of the other end of the contact 340 on the -x-axis direction side on the x-axis. The core wire 391 of the cable 390 is connected to the end of the contact 340 on the -x-axis direction side. The connection portion between the contact 340 and the core wire 391 may be disposed inside the inner housing 330.

[0106] <Contact>

[0107] The contact 340 has a protrusion 341 at one end on the +x-axis direction side. The one end on the +x-axis direction side of the contact 340 is connected to the contact 440 of the female connector 400. The protrusion 341 on the +x-axis direction side of the contact 340 has a protruding shape so as to be fitted with the contact 440. The other end on the -x-axis direction side of the contact 340 is connected to the core wire 391 of the cable 390.

[0108] <Casing>

[0109] The sleeve 350 includes a cylindrical first portion 351 and a cylindrical second portion 352. The first portion 351 is located inside the GND shell 310. The first portion 351 covers the shielding layer 393 exposed from one end of the outer cover 394 of the cable 390. The second portion 352 covers the outer cover 394 of the cable 390. Therefore, the connection portion between the first portion 351 and the second portion 352 is located near the end of the outer cover 394.

[0110] <Impedance Adjuster>

[0111] like Fig.15 As shown, a portion of the impedance adjuster 360 is assembled into the inner housing 330. Specifically, for example, a portion of the impedance adjuster 360 on the +x-axis direction side is assembled into a portion of the inner housing 330 on the -x-axis direction side. The impedance adjuster 360 may be assembled into the inner housing 330 by insert molding. Alternatively, the impedance adjuster 360 may be assembled into the inner housing 330 by press-fitting into the inner housing 330.

[0112] The impedance adjuster 360 includes a conductor. For example, the impedance adjuster 360 includes a metal as a material. It should be noted that the impedance adjuster 360 may also include materials other than metal, as long as it includes a conductor. The impedance adjuster 360 may be electrically insulated from the contact 340 and the core wire 391 as the transmission path of the high-frequency signal, and may be electrically insulated from the ground potential. In other words, the impedance adjuster 360 may be a hollow ground potential that is not directly connected to another conductor. This eliminates the need for a circuit for connecting the impedance adjuster 360 to another conductor, and reduces the impedance near the space layer 395 containing air in the relay connector device 30, thereby improving impedance matching.

[0113] It should be noted that the impedance adjuster 360 may also be electrically connected to the ground potential. For example, the impedance adjuster 360 may be connected to the GND shell 310 so that the impedance adjuster 360 is maintained at the electrical ground potential. Thus, the impedance near the space layer 395 containing air in the relay connector device 30 can be reduced and the impedance matching can be improved.

[0114] The impedance adjuster 360 is tubular. For example, the impedance adjuster 360 has a cylindrical shape. The impedance adjuster 360 is configured in such a way that its central axis is along the x-axis direction. Therefore, the impedance adjuster 360 is tubular, and its central axis is located at the contact 340 and the core wire 391 of the cable 390.

[0115] It should be noted that the impedance adjuster 360 may be a square tube or a square tube with rounded corners, as long as it is a tube. In addition, the impedance adjuster 360 may have a tube shape in which a plurality of components are combined into a tube shape or may have a cutout in a part of the tube shape. The impedance adjuster 360 adjusts the impedance by surrounding the contact member 340 and the core wire 391 on the central axis, thereby improving impedance matching.

[0116] The impedance adjuster 360 is disposed in the GND shell 310 together with the inner shell 330 and the contact member 340. The end of the impedance adjuster 360 on the +x-axis direction side is located inside the inner shell 330. The end of the impedance adjuster 360 on the -x-axis direction side is located above the coating layer 392 of the cable 390. The end of the coating layer 392 on the +x-axis direction side of the cable 390 is a cut surface. Therefore, the impedance adjuster 360 covers the end of the coating layer 392. Thus, the impedance adjuster 360 covers the exposed portion of the core wire 391.

[0117] As described above, the impedance regulator 360 covers the exposed portion of the core wire 391 connected to the contact 340 that protrudes from the inner housing 330. A space layer 395 is formed between the exposed portion of the core wire 391 connected to the contact 340 that protrudes from the inner housing 330 and the GND housing 310. The impedance adjuster 360 is disposed in the space layer 395 formed between the exposed portion and the GND housing 310.

[0118] <EMI housing>

[0119] The EMI housing 370 includes a conductor. For example, the EMI housing 370 includes a metal as a material. It should be noted that the EMI housing 370 may include a material other than metal as long as it includes a conductor. The EMI housing 370 has a semi-cylindrical shape. The EMI housing 370 contacts the GND housing 310 and covers a part of the GND housing 310. For example, the EMI housing 370 covers the opening of the GND housing 310.

[0120] <outer housing>

[0121] The components of the GND housing 310, the inner housing 330, the contact 340, the sleeve 350, the impedance regulator 360, and the EMI housing 370 are installed inside the outer housing 380.

[0122] <cable>

[0123] The cable 390 includes a core wire 391, a coating layer 392, a shielding layer 393, and an outer jacket 394. The structures and functions of the core wire 391, the coating layer 392, the shielding layer 393, and the outer jacket 394 in the cable 390 are the same as the structures and functions of the core wire 191, the coating layer 192, the shielding layer 193, and the outer jacket 194 in the cable 190, respectively.

[0124] <female-side connector>

[0125] The female-side connector 400 will be described below. Fig.16 is an exploded perspective view showing each member constituting the connector 400 in the relay connector device 30 according to the first embodiment. Fig.17 is a perspective view showing the inner housing 430 and the impedance regulator 460 in the relay connector device 30 according to the first embodiment. In Fig.17 the inner housing 430 is shown as transparent. As Fig.11 , Fig.13 and Figure 16 to Figure 17As shown, the connector 400 includes a GND housing 410, an inner housing 430, contacts 440, a sleeve 450, an impedance regulator 460, an EMI housing 470, and an outer housing 480.

[0126] In the case of the connector 300, the cable 390 is located on the -x-axis direction side of the connector 300, while in the case of the connector 400, the cable 490 is located on the +x-axis direction side of the connector 400. In addition, the basic structures and functions of the GND housing 410, the inner housing 430, the contacts 440, the sleeve 450, the impedance regulator 460, the EMI housing 470, and the outer housing 480 of the connector 400 are the same as the structures and functions of the GND housing 310, the inner housing 330, the contacts 340, the sleeve 350, the impedance regulator 360, the EMI housing 370, and the outer housing 380 of the connector 300, respectively.

[0127] <GND housing>

[0128] The inner housing 430, the contacts 440, and the impedance regulator 460 are disposed inside the GND housing 410. Further, a part of the sleeve 450 and the cable 490 is located inside the GND housing 410. The inner housing 430 can be press-fitted into the inside of the GND housing 410.

[0129] The end portion on the -x-axis direction side of the GND housing 410 is disposed close to the end portion on the -x-axis direction side of the inner housing 430. On the other hand, the end portion on the +x-axis direction side of the GND housing 410 is located above the outer cover 494 of the cable 490. The position of the end portion on the +x-axis direction side of the GND housing 410 on the x-axis may coincide with the position of the end portion on the +x-axis direction side of the sleeve 450 on the x-axis.

[0130] <Inner housing>

[0131] As Fig.17 shown, a part of the +x-axis direction side of the inner housing 430 incorporates a part of the -x-axis direction side of the impedance adjuster 460. The inner housing 430 is disposed inside the GND housing 410. The contacts 440 are disposed inside the inner housing 430. Therefore, the inner housing 430 supports the contacts 440.

[0132] The inner housing 430 includes a first portion 431 and a second portion 432. The first portion 431 is disposed on the -x-axis side of the second portion 432. The first portion 431 and the second portion 432 have a cylindrical shape, and the central axis thereof coincides with the central axis of the inner housing 430. The outer diameter of the first portion 431 is smaller than the outer diameter of the second portion 432. The first portion 431 is engaged with the recess 331 of the inner housing 330 of the connector 300. When the first portion 431 is engaged with the recess 331, the protrusion 341 of the contact 340 of the connector 300 is engaged with the recess 441 of the contact 440 of the connector 400.

[0133] The end of the inner shell 430 on the -x-axis direction side is the end face of the first part 431 on the -x-axis direction side. The end of the inner shell 430 on the -x-axis direction side is arranged close to the end of the GND shell 410 on the -x-axis direction side. For example, the position of the end of the inner shell 430 on the -x-axis direction side on the x-axis may coincide with the position of the end of the GND shell 410 on the -x-axis direction side on the x-axis. The recess 441 on the -x-axis direction side of the contact 440 is arranged inside the first part 431.

[0134] The end of the inner housing 430 on the +x-axis direction side is disposed close to the end of the contact 440 on the +x-axis direction side. For example, the position of the end of the inner housing 430 on the +x-axis direction side on the x-axis may coincide with the position of the other end of the contact 440 on the +x-axis direction side on the x-axis. The core wire 491 of the cable 490 is connected to the end of the contact 440 on the +x-axis direction side. The connection portion between the contact 440 and the core wire 491 of the cable 490 may be disposed inside the inner housing 430.

[0135] <Contact>

[0136] The contact 440 has a recess 441 at one end on the -x-axis direction side. The contact 440 is disposed inside the inner housing 430. The end of the contact 440 on the +x-axis direction side is connected to the core wire 491 of the cable 490. The protrusion 341 of the contact 340 of the male connector 300 is engaged with the recess 441 of the contact 440 of the female connector 400.

[0137] <Casing>

[0138] The sleeve 450 includes a cylindrical first portion 451 and a cylindrical second portion 452. The first portion 451 is disposed on the -x-axis direction side of the second portion 452. The outer diameter of the first portion 451 is smaller than the outer diameter of the second portion 452. The inner diameter of the first portion 451 is smaller than the inner diameter of the second portion 452.

[0139] The first portion 451 is located inside the GND case 410. The first portion 451 covers the shielding layer 493 exposed from one end of the outer jacket 494 of the cable 490. The second portion 452 covers the outer jacket 494 of the cable 490. Therefore, the connection portion between the first portion 451 and the second portion 452 is located at a position close to the end of the outer jacket 494.

[0140] <Impedance regulator>

[0141] As Fig.17 shown, a part of the impedance regulator 460 is incorporated into the inner case 430. Specifically, for example, a part of the -x-axis direction side of the impedance adjuster 460 is incorporated into a part of the +x-axis direction side of the inner case 430.

[0142] The impedance regulator 460 is disposed inside the GND case 410 together with the inner case 430 and the contact 440. The end of the -x-axis direction side of the impedance regulator 460 is located inside the inner case 430. The end of the +x-axis direction side of the impedance regulator 460 is located above the coating layer 492 of the cable 490. The end of the -x-axis direction side coating layer 492 of the cable 490 is a cut surface. Therefore, the impedance regulator 460 covers the end of the coating layer 492.

[0143] The impedance regulator 460 covers the exposed portion of the core wire 491 connected to the contact 440 and exposed from the inner case 430. A space layer 495 is formed between the exposed portion of the core wire 491 connected to the contact 440 and exposed from the inner case 430 and the GND case 410. The impedance adjuster 460 is disposed in the space layer 495 formed between the exposed portion and the GND case 410.

[0144] <EMI case>

[0145] The EMI case 470 contacts the GND case 410 and covers a part of the GND case 410. For example, the EMI case 470 covers the opening of the GND case 410.

[0146] <Outer housing>

[0147] The components of the GND shell 410 , the inner shell 430 , the contact 440 , the sleeve 450 , the impedance adjuster 460 , and the EMI shell 470 are installed inside the outer shell 480 .

[0148] <Cable>

[0149] The cable 490 includes a core wire 491, a coating layer 492, a shielding layer 493, and an outer cover 494. The structures and functions of the core wire 491, the coating layer 492, the shielding layer 493, and the outer cover 494 in the cable 490 are respectively the same as the structures and functions of the core wire 391, the coating layer 392, the shielding layer 393, and the outer cover 394 in the cable 390. However, it should be noted that the direction in which the core wire 491 is connected to the contact 440, the direction of the end face of the coating layer 492 having a cut surface, the direction of the end of the shielding layer 493 and the direction of its folding, the direction of the end face of the outer cover 494, etc. are all opposite to those in the cable 390.

[0150] The connection operation of the relay connector device 30 of this embodiment will be described below. Fig.18 1 is a cross-sectional view showing the connection operation of the connector 300 and the connector 400 in the relay connector device 30 according to the first embodiment. Fig.11 and Fig.18 As shown, in the relay connector device 30 according to the present embodiment, the connector 300 and the connector 400 are opposite to each other. Then, the protrusion 341 of the contact 340 is engaged with the recess 441 of the contact 440. Thus, a transmission path of a high-frequency signal is formed between the contact 340 and the contact 440. At the same time, the first portion 431 of the inner housing 430 can be engaged with the recess 331 of the inner housing 330. In addition, the GND shell 310 and the GND shell 410 are in contact with each other. Thus, a shield covering the high-frequency signal transmission path is formed.

[0151] The impedance adjuster 360 covers and surrounds the core wire 391 of the inner shell 330 and the coating layer 392 in the space layer 395. Also, the impedance adjuster 460 covers and surrounds the core wire 491 of the inner shell 430 and the coating layer 492 in the space layer 495.

[0152] The beneficial effects of this embodiment are described below. The relay connector device 30 according to this embodiment includes an impedance adjuster 360 and an impedance adjuster 460. The impedance adjuster 360 covers the exposed portion of the core wire 391 connected to the contact 340 that is exposed from the inner housing 330. Therefore, the impedance adjuster 360 allows the impedance of the relay connector device 30 to be adjusted, thereby improving impedance matching. The beneficial effects of the impedance adjuster 460 are the same as those of the impedance adjuster 360, so they are not repeated below.

[0153] Fig.19 : is a graph showing the impedance in the relay connector device 30 according to the first embodiment, in which the horizontal axis represents time and the vertical axis represents impedance. Fig.19 The impedance of the relay connector device 10 according to the comparative example is also shown. Fig.19 As shown, the impedance of the relay connector device 30 according to the present embodiment is lower than the impedance of the relay connector device 10 according to the comparative example, thereby being improved.

[0154] In addition, the impedance adjuster 360 is incorporated into the inner housing 330. This can fix the size and shape of the impedance adjuster 360, thereby improving the stability of impedance.

[0155] Furthermore, the impedance adjuster 360 in the relay connector device 30 according to the present embodiment is provided in the space layer 395 formed between the exposed portion of the core wire 391 and the GND shell 310. This allows control to increase the impedance in the core wire 391 of the cable 390 exposed in the space layer 395 containing air. This further improves impedance matching.

[0156] The impedance adjuster 360 is in a tubular shape, and its central axis is located at the contact 340 and the core wire 391. Thus, the contact 340 and the core wire 391 can be covered in an isotropic manner, thereby uniformly adjusting the impedance.

[0157] The impedance adjuster 360 may be assembled into the inner housing 330 by insert molding. This enables the impedance adjuster 360 to be securely fixed to the inner housing 330. On the other hand, the impedance adjuster 360 may be assembled into the inner housing 330 by press-fitting into the inner housing 330. This enables the impedance adjuster 360 to be easily assembled into the inner housing 330.

[0158] Although the embodiments of the present invention have been described above, the present invention includes appropriate modifications that do not deviate from the object and advantages thereof, and the present invention is not limited to the above-described embodiments. In addition, the structures of the comparative example and the first embodiment may be appropriately combined.

[0159] According to the disclosure of this description, it is obvious that the embodiment of the present case can be changed in many ways. Such changes should not be regarded as departing from the spirit and scope of the present case, and all such modifications obvious to those skilled in the art are intended to be included in the scope of the appended claims.

Claims

1. A coaxial cable connector, comprising a connector for a relay cable, characterized in that: The connector comprises: a contact member, comprising a conductor; an insulator body, comprising an insulator and supporting the contact; as well as an impedance adjuster, a portion of which is incorporated into the insulator body and includes a conductor, The impedance adjuster covers an exposed portion of a core wire of the cable connected to the contact, and the exposed portion is exposed from the insulator body.

2. The coaxial cable connector according to claim 1, wherein: The connector further comprises a GND shell, wherein the GND shell contains the conductor, The contact, the insulator body, and the impedance adjuster are located within the GND shell, and The impedance adjuster is disposed in a space layer formed between the exposed portion and the GND shell.

3. The coaxial cable connector according to claim 2, wherein: The impedance adjuster is tubular, and a central axis thereof is located at the contact piece and the core wire.

4. The coaxial cable connector according to claim 3, wherein: The cable comprises: The core wire includes the conductor; a covering layer, a portion of which covers the core wire and includes the insulator; a shielding layer, a portion of which covers the coating layer and contains the conductor; and An outer cover, a portion of which covers the shielding layer and includes the insulator, wherein the impedance adjuster covers an end portion of the coating layer.

5. The coaxial cable connector according to claim 1, wherein: The impedance adjuster is assembled into the insulator body by insert molding.

6. The coaxial cable connector according to claim 1, wherein: The impedance adjuster is assembled into the insulator body by being press-fitted into the insulator body.

7. The coaxial cable connector according to claim 2, wherein: The impedance adjuster is electrically connected to the GND shell.

8. The coaxial cable connector according to claim 2, wherein: The impedance adjuster is electrically insulated from the GND shell, the contact, and the core wire.

9. A coaxial cable connector, comprising a first connector and a second connector for relaying a first cable and a second cable, characterized in that: The first connector comprises: a first contact including a conductor and comprising a protrusion at one end thereof; a first insulator body including an insulator and supporting the first contact; and a first impedance adjuster, a portion of which is incorporated in the first insulator body and includes the conductor, The first impedance adjuster covers an exposed portion of a first core wire of the first cable connected to the other end of the first contact, the exposed portion being exposed from the first insulator body, and the second connector comprises: a second contact including the conductor and comprising a recess at one end thereof; a second insulator body including the insulator and supporting the second contact; and a second impedance adjuster, a portion of which is incorporated into the second insulator body and includes the conductor, The second impedance adjuster covers an exposed portion of a second core wire of the second cable connected to the other end of the second contact, the exposed portion being exposed from the second insulator body, and the protrusion of the first contact is fitted into the recess of the second contact.

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