WO2024253006A1 - 同軸コネクタの接続構造 - Google Patents

同軸コネクタの接続構造 Download PDF

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Publication number
WO2024253006A1
WO2024253006A1 PCT/JP2024/019778 JP2024019778W WO2024253006A1 WO 2024253006 A1 WO2024253006 A1 WO 2024253006A1 JP 2024019778 W JP2024019778 W JP 2024019778W WO 2024253006 A1 WO2024253006 A1 WO 2024253006A1
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WIPO (PCT)
Prior art keywords
coaxial connector
inner conductor
conductor
dielectric
tube portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2024/019778
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
泰徳 浅野
豊 小林
真二 田中
浩之 石榑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
Original Assignee
Sumitomo Wiring Systems Ltd
AutoNetworks Technologies Ltd
Sumitomo Electric Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Wiring Systems Ltd, AutoNetworks Technologies Ltd, Sumitomo Electric Industries Ltd filed Critical Sumitomo Wiring Systems Ltd
Priority to CN202480037333.3A priority Critical patent/CN121312027A/zh
Publication of WO2024253006A1 publication Critical patent/WO2024253006A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R24/00—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure
    • H01R24/38—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts
    • H01R24/40—Two-part coupling devices, or either of their cooperating parts, characterised by their overall structure having concentrically or coaxially arranged contacts specially adapted for high frequency

Definitions

  • This disclosure relates to a connection structure for a coaxial connector.
  • Patent Document 1 discloses a connection structure between a coaxial connector and a mating coaxial connector. When both connectors are connected, the movable housing part is located between the connection part of the center contact and the elastic contact piece part of the outer contact. Also, when both connectors are connected, the insulator faces the movable housing part.
  • Patent Document 1 The movable housing part and insulator of Patent Document 1 are thought to function as a dielectric between the inner conductor and the outer conductor.
  • Patent Document 1 assumes a configuration in which the insulator approaches the movable housing part in close proximity to the movable housing part, and is thought to be designed in a shape that can obtain the desired communication performance.
  • the present disclosure therefore aims to provide stable communication performance even if the connection position of the second coaxial connector relative to the first coaxial connector is misaligned.
  • the coaxial connector connection structure disclosed herein is a coaxial connector connection structure in which a first coaxial connector and a second coaxial connector are connected, the first coaxial connector includes a first inner conductor, a first outer conductor surrounding the outer periphery of the first inner conductor, and a first dielectric located between the first inner conductor and the first outer conductor, the second coaxial connector includes a second inner conductor, a second outer conductor surrounding the outer periphery of the second inner conductor, and a second dielectric located between the second inner conductor and the second outer conductor, and when a portion where the first inner conductor and the second inner conductor overlap in the connection direction of the first coaxial connector and the second coaxial connector in a connected state of the first coaxial connector and the second coaxial connector is defined as an inner overlap portion, and a portion where the first outer conductor and the second outer conductor overlap in the connection direction is defined as an outer overlap portion, both the first dielectric and the second dielectric are positioned to avoid both the inner overlap portion and the outer overlap portion
  • FIG. 1 is a perspective view showing a device according to an embodiment.
  • FIG. 2 is a cross-sectional view taken along line II-II of FIG.
  • FIG. 3 is a perspective view showing a connection structure of a coaxial connector.
  • FIG. 4 is an exploded perspective view showing the above connecting structure.
  • FIG. 5 is an enlarged cross-sectional view of FIG.
  • FIG. 6 is a partially cutaway perspective view showing a fixing portion of the first inner conductor to the first dielectric.
  • FIG. 7 is a perspective view showing another state of the connection structure of the coaxial connector.
  • FIG. 8 is a perspective view showing still another state of the connection structure of the coaxial connector.
  • connection structure of the coaxial connector disclosed herein is as follows:
  • a coaxial connector connection structure in which a first coaxial connector and a second coaxial connector are connected the first coaxial connector includes a first inner conductor, a first outer conductor surrounding the outer periphery of the first inner conductor, and a first dielectric located between the first inner conductor and the first outer conductor
  • the second coaxial connector includes a second inner conductor, a second outer conductor surrounding the outer periphery of the second inner conductor, and a second dielectric located between the second inner conductor and the second outer conductor, and when a portion where the first inner conductor and the second inner conductor overlap in the connection direction of the first coaxial connector and the second coaxial connector in a connected state of the first coaxial connector and the second coaxial connector is defined as an inner overlap portion, and a portion where the first outer conductor and the second outer conductor overlap in the connection direction is defined as an outer overlap portion, both the first dielectric and the second dielectric are positioned to avoid both the inner overlap portion and the outer overlap portion in the connection direction.
  • both the first and second dielectrics are positioned to avoid both the inner overlapping portion and the outer overlapping portion in the connection direction. Therefore, in the connection structure of the coaxial connectors, the first and second coaxial connectors can be designed so that the desired communication performance is obtained, assuming that air is present between the inner overlapping portion and the outer overlapping portion. In this case, even if the connection position of the second coaxial connector relative to the first coaxial connector is shifted, only the length of the air intervening portion changes in the connection direction. Stable communication performance is obtained compared to when each coaxial connector is designed assuming that a dielectric is present in most parts between the inner overlapping portion and the outer overlapping portion.
  • the first dielectric may be located closer to the base end of each of the first inner conductor and the first outer conductor than both the inner overlapping portion and the outer overlapping portion in the connection direction
  • the second dielectric may be located closer to the base end of each of the second inner conductor and the second outer conductor than both the inner overlapping portion and the outer overlapping portion in the connection direction.
  • the first dielectric can maintain a constant positional relationship between the first inner conductor and the first outer conductor closer to the base end of each of the first inner conductor and the first outer conductor than both the inner overlapping portion and the outer overlapping portion.
  • the second dielectric can maintain a constant positional relationship between the second inner conductor and the second outer conductor closer to the base end of each of the second inner conductor and the second outer conductor than both the inner overlapping portion and the outer overlapping portion. This makes it easier to maintain the coaxial state of the coaxial connector while providing an air layer, resulting in stable communication performance.
  • a maximum allowable length is set for each of the inner overlap portion and the outer overlap portion in the connection direction, and both the first dielectric and the second dielectric may be positioned to avoid both the inner overlap portion and the outer overlap portion when they reach their respective maximum allowable lengths.
  • the second coaxial connector is overconnected within the tolerance range relative to the first coaxial connector, it is expected that the inner overlap portion and the outer overlap portion will each reach their maximum allowable length. Even in this case, stable communication performance is obtained because air is present between the inner overlap portion and the outer overlap portion.
  • connection structure of a coaxial connector according to any one of (1) to (3), wherein the first inner conductor includes a first inner conductor tube portion and a first inner conductor elastic piece protruding from a tip of the first inner conductor tube portion, the second inner conductor includes a second inner conductor tube portion with which the first inner conductor elastic piece is in elastic contact, the first dielectric surrounds a base end portion of the first inner conductor tube portion, and the first dielectric may be located on the base end side of the first inner conductor tube portion, away from the tip of the first inner conductor tube portion by half or more of the protruding length of the first inner conductor elastic piece in the connection direction.
  • the first dielectric is likely to be positioned to avoid both the inner overlapping portion and the outer overlapping portion.
  • a connection structure of a coaxial connector according to any one of (1) to (4), wherein the second inner conductor includes a second inner conductor tube portion and a second inner conductor extension tube portion, the second outer conductor includes a second outer conductor tube portion and a second outer conductor extension tube portion, the second inner conductor tube portion is a portion connected to the first inner conductor, the second outer conductor tube portion is a portion connected to the first outer conductor, the second outer conductor tube portion is arranged coaxially around the second inner conductor tube portion, and the second dielectric may be arranged between the second inner conductor extension tube portion and the second outer conductor extension tube portion in the connection direction, avoiding a gap between the second inner conductor tube portion and the second outer conductor tube portion.
  • a connection structure of a coaxial connector according to any one of (1) to (4), wherein the first inner conductor includes a first inner conductor tube portion and a first inner conductor elastic piece protruding from a tip of the first inner conductor tube portion, the first outer conductor includes a first outer conductor tube portion and a first outer conductor elastic piece protruding from a tip of the first outer conductor tube portion, the second inner conductor includes a second inner conductor tube portion with which the first inner conductor elastic piece is in elastic contact, the second outer conductor includes a second outer conductor tube portion with which the first outer conductor elastic piece is in elastic contact, the first inner conductor elastic piece is in elastic contact with an inner peripheral surface of the second inner conductor tube portion, and the first outer conductor elastic piece may be in elastic contact with an outer peripheral surface of the second outer conductor tube portion.
  • a connection structure of a coaxial connector according to any one of (1) to (6), wherein the first inner conductor includes a positioning piece that protrudes outward from the outer peripheral surface of the base end of the first inner conductor and extends along the central axis of the first inner conductor, and the first dielectric is formed with an insertion hole into which the base end of the first inner conductor is inserted and a positioning groove into which the positioning piece is fitted, and the first inner conductor is fixed in an inserted state in the first dielectric by fitting the positioning piece into the positioning groove with the base end of the first inner conductor inserted into the insertion hole.
  • the protruding end of the positioning piece may be formed with a stopper protrusion that hooks onto the first dielectric inside the positioning groove.
  • the anti-slip projection on the protruding end of the positioning piece catches on the first dielectric inside the positioning groove, making it difficult for the first inner conductor to come out of the first dielectric.
  • a retaining annular protrusion that protrudes annularly toward the tip side of the first inner conductor may be formed on the portion of the first dielectric that surrounds the insertion hole.
  • the first inner conductor can also be held by the retaining annular protrusion, so the first inner conductor is held more firmly.
  • connection structure of a coaxial connector according to any one of (7) to (9), wherein an outer peripheral portion of the first dielectric on the side of the first outer conductor may be formed with an outer peripheral annular protrusion that protrudes in an annular shape toward the tip side of the first inner conductor.
  • the outer peripheral annular convex portion comes into contact with the first outer conductor, which tends to stabilize the position of the first outer conductor relative to the first dielectric. This stabilizes the positional relationship between the first inner conductor and the first outer conductor, which tends to stabilize communication performance.
  • connection structure for a coaxial connector according to any one of (1) to (10), wherein the first coaxial connector is a board-side coaxial connector fixed to a circuit board, and the second coaxial connector may be a relay coaxial connector that relays the first coaxial connector and a third coaxial connector.
  • the second coaxial connector is an intermediate coaxial connector that intermediates the first coaxial connector and the third coaxial connector
  • the position of the second coaxial connector relative to the first coaxial connector may vary depending on the relative positions of the first coaxial connector and the third coaxial connector. In such a case, stable communication performance can be obtained between the first coaxial connector and the second coaxial connector.
  • connection structure of the coaxial connector of the present disclosure will be described below with reference to the drawings. Note that the present disclosure is not limited to these examples, but is defined by the claims, and is intended to include all modifications within the meaning and scope of the claims.
  • FIG. 1 is a perspective view showing a device 10 equipped with a coaxial connector connection structure 28.
  • Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1.
  • the device 10 is, for example, a camera device.
  • the camera device is, for example, a device mounted on a vehicle.
  • the device 10 does not have to be a camera device.
  • the device 10 comprises a case 12, an electrical component 20, and a coaxial connector for external connection 30.
  • the electrical component 20 is housed inside the case 12.
  • the coaxial connector for external connection 30 is a connector for connecting the electrical component 20 to an external electrical component.
  • the coaxial connector for external connection 30 is a connector to which a cable connected to an external electrical component is connected.
  • the case 12 comprises a first case 13 and a second case 14.
  • the first case 13 and the second case 14 are formed, for example, from resin.
  • the first case 13 and the second case 14 are combined to form the rectangular box-shaped case 12 that houses the electrical components 20. If the device 10 is a camera device, it is assumed that the first case 13 has a lens or window for capturing images, and the second case 14 has a coaxial connector 30 for external connection.
  • a retaining tube portion 16 protrudes from the bottom 15 of the case 12.
  • the retaining tube portion 16 is cylindrical and protrudes outward from the center of the bottom 15.
  • the inner opening of the retaining tube portion 16 opens into the second case 14, and the outer opening of the retaining tube portion 16 opens to the outside of the second case 14.
  • a retaining partition portion 17 is formed in the middle of the retaining tube portion 16 in the direction along the central axis X.
  • the retaining partition portion 17 is formed in the middle of the retaining tube portion 16 in the direction along the central axis X, near the inner opening.
  • the retaining partition portion 17 separates the space of the retaining tube portion 16 on the inner opening side from the space of the outer opening side.
  • a retaining hole 17h is formed in the retaining partition portion 17, and the external connection coaxial connector 30 is inserted and held in the retaining hole 17h.
  • the coaxial connector 30 for external connection comprises an inner conductor 32 for external connection, a dielectric 34 for external connection, and an outer conductor 36 for external connection.
  • the external connection inner conductor 32 is formed in a long, thin rod shape and is made of a conductive material such as metal.
  • the external connection inner conductor 32 is an example of a pin-shaped mating inner conductor that is inserted and connected to the second inner conductor 80 described below.
  • the external connection dielectric 34 is formed of an insulator such as resin and surrounds the external connection inner conductor 32.
  • the external connection outer conductor 36 is formed of a conductive material such as metal.
  • the external connection outer conductor 36 is formed in a cylindrical shape that surrounds the external connection dielectric 34.
  • the external connection outer conductor 36 is an example of a mating outer conductor to which the second outer conductor 90 is connected.
  • the electrical component 20 is, for example, a mounting board on which electronic components are mounted.
  • the electrical component 20 is assumed to be a circuit board 21 and an image sensor 22 mounted on the circuit board 21.
  • the image sensor 22 faces an image capturing lens or window in the first case 13, and captures the outside scenery by rotating the lens or window.
  • the side of the first case 13 to which the image sensor 22 faces may be referred to as the front side, and the opposite side, the second case 14 side, may be referred to as the rear side.
  • a coaxial connector connection structure 28 is incorporated into the device 10.
  • the coaxial connector connection structure 28 is a connection structure between a first coaxial connector 40 and a second coaxial connector 70.
  • the first coaxial connector 40 is provided on the surface of the circuit board 21 opposite the imaging element 22.
  • the first coaxial connector 40 is an example of a board-side coaxial connector that is fixed to the circuit board 21.
  • the first coaxial connector 40 includes a first inner conductor 50, a first outer conductor 60 that surrounds the outer periphery of the first inner conductor 50, and a first dielectric 42 that is located between the first inner conductor 50 and the first outer conductor 60.
  • the first dielectric 42 surrounds the first inner conductor 50.
  • the first dielectric 42 is made of an insulator.
  • the first outer conductor 60 surrounds the first dielectric 42.
  • the base end of the first inner conductor 50 and the base end of the first outer conductor 60 are fixed to the circuit board 21 by soldering or the like.
  • the first inner conductor 50 and the first outer conductor 60 are electrically connected to the circuit of the circuit board 21 and are fixed in a state protruding from the circuit board 21.
  • the first coaxial connector 40 protrudes from the circuit board 21 toward the coaxial connector 30 for external connection.
  • a second coaxial connector 70 is connected to the first coaxial connector 40.
  • the second coaxial connector 70 includes a second inner conductor 80, a second outer conductor 90 surrounding the outer periphery of the second inner conductor 80, and a second dielectric 72 located between the second inner conductor 80 and the second outer conductor 90.
  • the second dielectric 72 surrounds the periphery of the second inner conductor 80.
  • the second dielectric 72 is composed of an insulator.
  • the second outer conductor 90 surrounds the periphery of the second dielectric 72.
  • the second coaxial connector 70 is connected to the first coaxial connector 40 with the first inner conductor 50 inserted and connected to the second inner conductor 80 and the second outer conductor 90 inserted and connected to the first outer conductor 60.
  • the second coaxial connector 70 protrudes further from the first coaxial connector 40 toward the coaxial connector 30 for external connection.
  • the second coaxial connector 70 relays the connection between the first coaxial connector 40 and the coaxial connector for external connection 30.
  • the second coaxial connector 70 is connected to the first coaxial connector 40 and the coaxial connector for external connection 30 in a manner that allows the position of the second coaxial connector 70 to be changed.
  • the external coaxial connector 30 may be understood to be the third coaxial connector
  • the second coaxial connector 70 may be understood to be an intermediate coaxial connector that intermediately connects the first coaxial connector 40 and the third coaxial connector.
  • the coaxial connector 30 for external connection is provided on the second case 14 side, i.e., the rear side of the case 12. Inside the case 12, the second coaxial connector 70 is connected to the coaxial connector 30 for external connection.
  • the external electrical component to which the cable is connected is electrically connected to the electrical component 20 inside the case 12.
  • the circuit board 21 is supported at a fixed position within the case 12.
  • the position of the first coaxial connector 40 relative to the coaxial connector 30 for external connection is set to a fixed position.
  • the position of the first coaxial connector 40 relative to the coaxial connector 30 for external connection may deviate from the designed position.
  • the insertion amount of the second coaxial connector 70 into the first coaxial connector 40 can be adjusted within a range in which the first inner conductor 50 and the second inner conductor 80 can maintain electrical contact, and the first outer conductor 60 and the second outer conductor can maintain electrical contact.
  • the second coaxial connector 70 can be inserted and connected in a tilted state with respect to the first coaxial connector 40 and the external connection coaxial connector 30.
  • Fig. 3 is a perspective view showing the coaxial connector connection structure 28.
  • Fig. 4 is an exploded perspective view showing the same connection structure.
  • Fig. 5 is an enlarged sectional view of Fig. 3.
  • Fig. 6 is a partially cutaway perspective view showing a fixing point of the first inner conductor 50 to the first dielectric 42.
  • the first coaxial connector 40 includes the first inner conductor 50 , the first outer conductor 60 , and the first dielectric material 42 .
  • the first inner conductor 50 is an elongated conductive member.
  • the first inner conductor 50 is formed by pressing a metal plate.
  • the first inner conductor may also be formed by cutting a metal material.
  • the first inner conductor 50 includes a first inner conductor tube portion 52 and a first inner conductor elastic piece 56.
  • the first inner conductor tube portion 52 is formed in a tubular shape, more specifically, in a cylindrical shape.
  • the base end of the first inner conductor 50 is accommodated and held in the first dielectric 42.
  • the tip is the end to which the second coaxial connector 70 is connected, and the base end is the end opposite the tip, in this case the end facing the circuit board 21.
  • a positioning piece 53 is formed so as to protrude from a circumferential portion at the base end of the first inner conductor tube portion 52 toward the outer periphery.
  • the positioning piece 53 is a plate-shaped portion that follows the central axis of the first inner conductor tube portion 52, and in this embodiment, is a rectangular plate-shaped portion.
  • the positioning piece 53 is configured by two overlapping plate-shaped portions.
  • the first inner conductor tube portion 52 is formed by pressing the plate-shaped portions into a tube.
  • a plate-shaped portion protrudes toward the outer periphery from each of two adjacent edges at the joint of the tube, and the positioning piece 53 is formed by the overlap of the two plate-shaped portions.
  • a retaining projection 53p that hooks onto the bottom of the positioning groove 44 of the first dielectric 42 is formed on the protruding end 53e of the positioning piece 53.
  • the retaining projection 53p is formed in a shape that hooks onto the bottom of the positioning groove 44 so that the first inner conductor tube portion 52 is less likely to slip out toward the tip side of the first dielectric 42.
  • the retaining projection 53p is formed in a triangular plate shape.
  • the edge of the retaining projection 53p on the tip side of the first inner conductor tube portion 52 is more inclined with respect to the central axis X than the edge of the retaining projection 53p on the base side of the first inner conductor tube portion 52.
  • the positioning piece 53 and the retaining projection 53p may be omitted.
  • the first inner conductor tube portion 52 may be formed with a locking piece 52a that hooks onto the inner peripheral surface of the first dielectric 42 when pressed into the first dielectric 42.
  • a protruding piece 52b that extends along the main surface of the circuit board 21 and is used for soldering may be provided at the base end of the first inner conductor tube portion 52.
  • a first inner conductor elastic piece 56 protrudes from the tip of the first inner conductor tube portion 52.
  • multiple (here, three) first inner conductor elastic pieces 56 extend from the tip of the first inner conductor tube portion 52 at intervals in the circumferential direction.
  • the multiple first inner conductor elastic pieces 56 are positioned at equal intervals around the central axis X of the first inner conductor tube portion 52.
  • the first inner conductor elastic piece 56 includes an inclined portion 56a that inclines outward from the tip of the first inner conductor tube portion 52, and a curved portion 56b that is connected to the tip of the inclined portion 56a and has an outwardly convex curved shape.
  • the number of elastic pieces may be two or four or more.
  • the first dielectric 42 is formed into a disk shape from resin or the like.
  • the maximum thickness dimension of the first dielectric 42 is smaller than the length dimension of the first inner conductor tube portion 52.
  • the first dielectric 42 is, for example, a molded resin part.
  • an insertion hole 43 is formed into which the base end of the first inner conductor 50, more specifically, the base end of the first inner conductor tube portion 52, is inserted. Also, a positioning groove 44 is formed into which a positioning piece 53 is fitted. The positioning groove 44 is recessed from a portion of the circumference of the insertion hole 43 toward the outer periphery and is formed as a groove extending along the central axis X.
  • the first inner conductor 50 is inserted and held in the first dielectric 42 by inserting the first inner conductor tube portion 52 into the insertion hole 43.
  • the first inner conductor tube portion 52 is pressed into and held in the insertion hole 43.
  • the above press-fit structure makes it easier to hold the first inner conductor firmly against the first dielectric. If the first inner conductor 50 is a pressed metal plate product, a positioning piece 53 is fitted into the positioning groove 44 to increase the holding strength. The inner surface of the positioning groove 44 clamps the positioning piece 53, making it easier for the first dielectric 42 to hold the first inner conductor 50 firmly.
  • the anti-slip protrusion 53p of the positioning piece 53 hooks into the bottom of the positioning groove 44, making it difficult for the first inner conductor 50 to come out of the first dielectric 42, and the first inner conductor 50 is held more firmly.
  • a retaining annular protrusion 45 that protrudes annularly toward the tip side of the first inner conductor 50 is formed in the portion of the first dielectric 42 that surrounds the insertion hole 43.
  • the retaining annular protrusion 45 holds the first inner conductor tube portion 52, so that the first inner conductor 50 is held more firmly and the first inner conductor 50 is less likely to tilt relative to the first dielectric 42.
  • the outer peripheral surface of the first dielectric 42 is formed in a short cylindrical peripheral surface shape that can be inserted into the inner peripheral portion of the first outer conductor 60.
  • An outer peripheral annular protrusion 46 that protrudes in an annular shape toward the tip side of the first inner conductor 50 is formed on the outer peripheral portion of the first dielectric 42 on the first outer conductor 60 side.
  • the outer peripheral surface of the first dielectric 42 is formed wide in the direction of the central axis X by the outer peripheral annular protrusion 46. Therefore, the outer peripheral surface of the first dielectric 42 can face the inner peripheral surface of the first outer conductor 60 over a wide area.
  • the first outer conductor 60 is made of a conductive material such as metal, and surrounds the first dielectric 42. Therefore, the first dielectric 42 is a cylindrical member interposed between the first inner conductor 50 and the first outer conductor 60.
  • the first outer conductor 60 is formed, for example, by pressing a metal plate.
  • the first outer conductor 60 includes a first outer conductor tube portion 62 and a first outer conductor elastic piece 66 that protrudes from the tip of the first outer conductor tube portion 62.
  • the first outer conductor tube portion 62 is formed in a tubular shape, more specifically, a cylindrical shape, in which the first dielectric 42 can be placed.
  • the first dielectric 42 is housed and held in the base end portion of the first outer conductor tube portion 62.
  • the first outer conductor tube portion 62 may be formed with a locking piece 62a that hooks onto the outer peripheral surface of the first dielectric 42 when the first dielectric 42 is pressed in.
  • a first outer conductor elastic piece 66 protrudes from the tip of the first outer conductor tube portion 62.
  • multiple (here, eight) first outer conductor elastic pieces 66 extend from the tip of the first outer conductor tube portion 62 at intervals in the circumferential direction.
  • the multiple first outer conductor elastic pieces 66 are positioned at equal intervals around the central axis X of the first outer conductor tube portion 62.
  • the first outer conductor elastic piece 66 includes an inclined portion 66a that slopes inward from the tip of the first outer conductor tube portion 62, and a curved portion 66b that is connected to the tip of the inclined portion 66a and has an inwardly convex curved shape.
  • the number of elastic pieces may be seven or less, or nine or more.
  • the length dimension of the first outer conductor tube portion 62 is greater than the thickness dimension of the first dielectric 42. In this embodiment, the length dimension of the first outer conductor tube portion 62 is greater than the length dimension of the first inner conductor 50. Furthermore, the base end of the first outer conductor elastic piece 66 is positioned farther away from the first dielectric 42 than the base end of the first inner conductor elastic piece 56. Furthermore, the tip of the first outer conductor elastic piece 66 is positioned farther away from the first dielectric 42 than the tip of the first inner conductor elastic piece 56. However, the curved portions 56b, 66b can contact the second inner conductor 80 or the second outer conductor 90 at the same position in the central axis X.
  • the first coaxial connector 40 may be surrounded by a cylindrical connector holder 41.
  • the connector holder 41 is a member formed of resin or the like, and serves to surround the first coaxial connector 40 from all sides and prevent it from coming into contact with other members.
  • the second coaxial connector 70 includes the second inner conductor 80 , the second outer conductor 90 , and the second dielectric 72 .
  • the second inner conductor 80 is an elongated conductive member.
  • the second inner conductor 80 is formed by pressing a metal plate. More specifically, the second inner conductor 80 includes a second inner conductor tube portion 82 and a second inner conductor extension tube portion 86.
  • the second inner conductor tube portion 82 is formed in a tubular shape, more specifically, in a cylindrical shape.
  • the open end of the second inner conductor tube portion 82 faces the first coaxial connector 40.
  • the second inner conductor tube portion 82 is the portion that is connected to the first inner conductor 50.
  • the second inner conductor tube portion 82 is a long and thin tube extending along the central axis X.
  • the inner diameter of the second inner conductor tube portion 82 is smaller than the outer diameter of an imaginary circle connecting the tops of the first inner conductor elastic pieces 56.
  • the first inner conductor elastic pieces 56 can elastically contact the inner peripheral surface of the second inner conductor tube portion 82 while elastically deforming inward.
  • the second inner conductor tube portion 82 is longer than the first inner conductor elastic piece 56.
  • the first inner conductor 50 and the second inner conductor 80 can be connected by the apex of the curved portion 56b of the first inner conductor elastic piece 56 contacting any position on the inner surface of the second inner conductor tube portion 82. This makes it possible to accommodate misalignment between the first inner conductor 50 and the second inner conductor 80 in the direction of the central axis X.
  • the second inner conductor extension tube portion 86 is located on the opposite side of the second inner conductor tube portion 82 from the first coaxial connector 40. In this embodiment, the second inner conductor extension tube portion 86 is thinner than the second inner conductor tube portion 82.
  • the second inner conductor extension tube portion 86 is connected to the second inner conductor tube portion 82 via a tapered portion 81.
  • the tapered portion 81 is a tapered portion that gradually becomes thinner from the second inner conductor tube portion 82 toward the second inner conductor extension tube portion 86.
  • the second inner conductor extension tube portion may be connected to the second inner conductor tube portion via a step portion.
  • the second inner conductor extension tube portion 86 may have an elastic piece 87 that protrudes toward the tip side.
  • the elastic piece 87 is configured to be elastically deformable in the inward and outward directions.
  • the inner conductor for external connection 32 is inserted between the two elastic pieces 87 from the tip side of the two elastic pieces 87.
  • the second inner conductor 80 is connected to the inner conductor for external connection 32 by the inner conductor for external connection 32 being sandwiched between the two elastic pieces 87.
  • the second inner conductor extension tube portion 86 may be formed with a partial locking piece 86a that can be locked to the second dielectric 72.
  • the second dielectric 72 is made of resin or the like.
  • the second dielectric 72 is, for example, a molded resin part.
  • the second dielectric 72 is formed in a cylindrical shape capable of accommodating at least a portion of the second inner conductor 80.
  • the second dielectric 72 is formed in a cylindrical shape.
  • the second inner conductor extension tubular portion 86 is accommodated within the second dielectric 72.
  • the internal space of the second inner conductor extension tubular portion 86 is large enough to hold the base end of the second inner conductor extension tubular portion 86 in a pressed-in state and to allow elastic deformation of the elastic piece 87 in the inward and outward directions.
  • One end of the second dielectric 72 contacts the tapered portion 81, so that the second dielectric 72 can be positioned relative to the second inner conductor 80.
  • the second inner conductor tube portion 82 extends further toward the first coaxial connector 40 than the second dielectric 72.
  • the second outer conductor 90 is disposed on the outer periphery of the second dielectric 72.
  • the second outer conductor 90 is formed from a conductive material such as metal, and surrounds the second dielectric 72.
  • the second outer conductor 90 is formed, for example, by pressing a metal plate.
  • the second outer conductor 90 comprises a second outer conductor tube portion 92 and a second outer conductor extension tube portion 96.
  • the second outer conductor tube portion 92 is formed in a tubular shape, more specifically, in a cylindrical shape.
  • the open end of the second outer conductor tube portion 92 faces the first coaxial connector 40.
  • the second outer conductor tube portion 92 is the portion that is connected to the first outer conductor 60.
  • the second outer conductor tube portion 92 is positioned on the outer periphery side of the second inner conductor tube portion 82 with a gap therebetween.
  • the outer diameter of the second outer conductor tube portion 92 is larger than the outer diameter of an imaginary circle connecting the tops of the multiple first outer conductor elastic pieces 66.
  • the multiple first outer conductor elastic pieces 66 can elastically contact the outer periphery surface of the second outer conductor tube portion 92 while elastically deforming outward.
  • the second outer conductor tube portion 92 is longer than the first outer conductor elastic piece 66.
  • the first outer conductor 60 and the second outer conductor 90 can be connected by the top of the curved portion 66b of the first outer conductor elastic piece 66 contacting any position on the outer circumferential surface of the second outer conductor tube portion 92. This makes it possible to accommodate misalignment between the first outer conductor 60 and the second outer conductor 90 in the direction of the central axis X.
  • the second outer conductor extension tube portion 96 is located on the opposite side of the second outer conductor tube portion 92 from the first coaxial connector 40. In this embodiment, the second outer conductor extension tube portion 96 is thinner than the second outer conductor tube portion 92.
  • the second outer conductor extension tube portion 96 is connected to the second outer conductor tube portion 92 via a tapered portion 91.
  • the tapered portion 91 is a tapered portion that gradually becomes thinner from the second outer conductor tube portion 92 toward the second outer conductor extension tube portion 96.
  • the second outer conductor extension tube portion may be connected to the second outer conductor tube portion via a step portion.
  • the second outer conductor extension tube portion 96 may have an elastic piece 97 that protrudes toward the tip side.
  • the elastic piece 97 is configured to be elastically deformable in the inward and outward directions.
  • the external connection outer conductor 36 is fitted onto the outer periphery of the multiple elastic pieces 97 from the tip side of the multiple elastic pieces 97.
  • the multiple elastic pieces 97 are elastically pressed against the inner peripheral surface of the external connection outer conductor 36, thereby connecting the second outer conductor 90 to the external connection outer conductor 36.
  • the second outer conductor extension tube portion 96 may be formed with a partial locking piece 96a that can be locked to the second dielectric 72.
  • connection direction between the first coaxial connector 40 and the second coaxial connector 70 is along the central axis X of the first coaxial connector 40 and the second coaxial connector 70.
  • the portion where the first inner conductor 50 and the second inner conductor 80 overlap is the inner overlap portion E1 (see FIG. 5).
  • the portion where the first outer conductor 60 and the second outer conductor 90 overlap is the outer overlap portion E2 (see FIG. 5).
  • the first dielectric 42 and the second dielectric 72 are both positioned in the connection direction, avoiding both the inner overlapping portion E1 and the outer overlapping portion E2.
  • the first dielectric 42 is positioned closer to the base end of each of the first inner conductor 50 and the first outer conductor 60 than both the inner overlapping portion E1 and the outer overlapping portion E2.
  • the second dielectric 72 is positioned closer to the base end of each of the second inner conductor 80 and the second outer conductor 90 than both the inner overlapping portion E1 and the outer overlapping portion E2.
  • the conductor located on the outermost side is the second inner conductor tube portion 82 of the second inner conductor 80.
  • the conductor located on the innermost side is the second outer conductor tube portion 92 of the second outer conductor 90.
  • the first dielectric 42 and the second dielectric 72 are not interposed, but an air layer is interposed.
  • the inner overlapping portion E1 and the outer overlapping portion E2 can be designed so that the desired communication performance is obtained, assuming the interposition of an air layer.
  • the first inner conductor 50 having the first inner conductor elastic piece 56 is located inside the second inner conductor tube portion 82, and the first outer conductor 60 having the first outer conductor elastic piece 66 is located outside the second outer conductor tube portion 92. Therefore, when designing the connection structure 28 of the coaxial connector, the inner overlapping portion E1 and the outer overlapping portion E2 can be designed so as to obtain the desired communication performance, assuming the outer diameter of the second inner conductor tube portion 82 with a continuous uniform diameter portion and the outer diameter of the second outer conductor tube portion 92 with a continuous uniform diameter portion. This makes the design easier than when designing based on the assumption of the presence of a complex elastic piece shape.
  • the distance L1 between the first coaxial connector 40 and the coaxial connector for external connection 30 may vary within the tolerance range.
  • Figure 7 shows a cross-sectional view of the case where the distance between the first coaxial connector 40 and the external coaxial connector 30 is the largest within the tolerance range, at distance Lmax.
  • the distance between the second inner conductor 80 and the first dielectric 42 increases, and the distance between the second outer conductor 90 and the first dielectric 42 also increases.
  • the area in which an air layer is present between the inner and outer conductors in the connection structure 28 increases.
  • the first coaxial connector 40 and the second coaxial connector 70 are designed on the premise that an air layer is present between the inner overlapping portion E1 and the outer overlapping portion E2. Therefore, even if the air layer increases proportionally, it is unlikely to affect communication performance.
  • each connector would be designed to obtain the desired communication performance assuming the presence of the dielectric.
  • the design is based on the assumption that an air layer is present between the inner overlap portion E1 and the outer overlap portion E2, so even if the air layer increases, it is unlikely to affect communication performance.
  • the diameters of each part are designed to obtain appropriate communication performance based on the dielectric constants of the first dielectric 42 and the second dielectric 72.
  • Figure 8 shows a cross-sectional view of the case where the distance between the first coaxial connector 40 and the external coaxial connector 30 is the smallest within the tolerance range, distance Lmin.
  • the length of the inner overlapping portion E1 is the maximum allowable length LE1max
  • the length of the outer overlapping portion E2 is the maximum allowable length LE2max.
  • the first dielectric 42 and the second dielectric 72 are positioned to avoid both the inner overlapping portion E1 and the outer overlapping portion E2, which have the maximum allowable lengths LE1max and LE2max.
  • the first dielectric 42 is positioned at a distance from the tip of the first inner conductor tube portion 52 to its base end side, at least half the protruding length N of the first inner conductor elastic piece 56 in the direction of the central axis X.
  • both the first dielectric 42 and the second dielectric 72 are positioned to avoid both the inner overlapping portion E1 and the outer overlapping portion E2. Therefore, the first coaxial connector 40 and the second coaxial connector 70 can be designed so as to obtain desired communication performance on the premise that air is interposed between the inner overlapping portion E1 and the outer overlapping portion E2. In this case, even if the connection position of the second coaxial connector 70 relative to the first coaxial connector 40 deviates from a predetermined position, only the length of the air interposed portion in the connection direction varies. Compared to the case where each coaxial connector is designed on the assumption that a dielectric is interposed in most parts between the inner overlapping portion E1 and the outer overlapping portion E2, stable communication performance can be obtained.
  • the first dielectric 42 can maintain a constant positional relationship between the first inner conductor 50 and the first outer conductor 60 at a position closer to the base end of each of the first inner conductor 50 and the first outer conductor 60 than both the inner overlapping portion E1 and the outer overlapping portion E2.
  • the second dielectric 72 can maintain a constant positional relationship between the second inner conductor 80 and the second outer conductor 90 at a position closer to the base end of each of the second inner conductor 80 and the second outer conductor 90 than both the inner overlapping portion E1 and the outer overlapping portion E2. This makes it easier to obtain stable communication performance while maintaining a coaxial structure in the connection structure.
  • the first dielectric 42 is positioned from the tip of the first inner conductor tube portion 52 toward its base end, at a distance of more than half the protruding length N of the first inner conductor elastic piece 56 in the direction of the central axis X, the first dielectric 42 is likely to be positioned avoiding the inner overlapping portion E1 and the outer overlapping portion E2.
  • the second dielectric 72 is positioned between the second inner conductor tube portion 82 and the second outer conductor tube portion 92 and between the second inner conductor extension tube portion 86 and the second outer conductor extension tube portion 96, it is easy to position air between the inner overlap portion E1 and the outer overlap portion E2.
  • the first inner conductor elastic piece 56 elastically contacts the inner peripheral surface of the second inner conductor tube portion 82
  • the first outer conductor elastic piece 66 elastically contacts the outer peripheral surface of the second outer conductor tube portion 92. Therefore, the elastic pieces 56, 66 are prevented from being interposed between the second inner conductor tube portion 82 and the second outer conductor tube portion 92.
  • the second inner conductor tube portion 82 and the second outer conductor tube portion 92 can be made cylindrical in their entirety.
  • the second inner conductor tube portion 82 and the second outer conductor tube portion 92 are components of the second coaxial connector 70, it is easy to maintain a constant positional relationship between the second inner conductor tube portion 82 and the second outer conductor tube portion 92. This results in more stable communication performance.
  • the positioning piece 53 is fitted into the positioning groove 44, thereby fixing the first inner conductor 50 in an inserted state in the first dielectric 42.
  • the first inner conductor tube portion 52 is firmly fixed to the first dielectric 42.
  • the first inner conductor 50 is formed by pressing a metal plate, the first inner conductor 50 is easily held firmly by the first dielectric 42. If the first inner conductor 50 is formed by pressing, costs can be reduced compared to when it is formed by cutting.
  • the anti-slip projection 53p at the protruding end of the positioning piece 53 hooks onto the bottom of the positioning groove 44, making it difficult for the first inner conductor 50 to come out of the first dielectric 42.
  • a retaining annular protrusion 45 is formed in the portion of the first dielectric 42 that surrounds the insertion hole 43, so that even if the first dielectric 42 is formed away from the overlapping portions E1 and E2, resulting in a thinned portion, it is easy to firmly retain the first inner conductor 50.
  • the outer peripheral annular convex portion 46 of the first dielectric 42 comes into contact with the first outer conductor 60, which makes it easier to stabilize the position of the first outer conductor 60 relative to the first dielectric 42. This makes the positional relationship between the first inner conductor 50 and the first outer conductor 60 stable, which makes it easier to stabilize communication performance.
  • the first coaxial connector 40 is a board-side coaxial connector
  • the second coaxial connector 70 is a relay coaxial connector that relays between the first coaxial connector 40 as a board-side coaxial connector and the coaxial connector for external connection 30.
  • the position of the second coaxial connector 70 relative to the first coaxial connector 40 may vary due to misalignment of the circuit board 21 relative to the coaxial connector for external connection 30. In such a case, stable communication performance can be obtained between the first coaxial connector 40 and the second coaxial connector 70.
  • Coaxial connector for external connection (third coaxial connector) 32: Inner conductor for external connection 34: Dielectric for external connection 36: Outer conductor for external connection 40: First coaxial connector (coaxial connector on board side) Description of the Reference Signs 41 Connector holder 42 First dielectric 43 Insertion hole 44 Positioning groove 45 Holding annular protrusion 46 Outer peripheral annular protrusion 50 First inner conductor 52 First inner conductor tube portion 52a Locking piece 52b Projecting piece 53 Positioning piece 53e Projecting end portion 53p Pull-out prevention protrusion 56 First inner conductor elastic piece 56a Inclined portion 56b Curved portion 60 First outer conductor 62 First outer conductor tube portion 62a Locking piece 66 First outer conductor elastic piece 66a Inclined portion 66b Curved portion 70 Second coaxial connector (relay coaxial connector) 72 Second dielectric 80 Second inner conductor 81

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  • Coupling Device And Connection With Printed Circuit (AREA)
PCT/JP2024/019778 2023-06-07 2024-05-29 同軸コネクタの接続構造 Ceased WO2024253006A1 (ja)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02295081A (ja) * 1989-05-09 1990-12-05 Orient Micro Ueebu:Kk 同軸コネクタ
US6497579B1 (en) * 1999-03-02 2002-12-24 Huber+Suhner Ag Coaxial connection with a tiltable adapter for a printed circuit board
JP2018206740A (ja) * 2017-06-09 2018-12-27 モレックス エルエルシー コネクタアセンブリ
JP2021077637A (ja) * 2019-11-08 2021-05-20 ギガレーン カンパニー リミテッドＧｉｇａｌａｎｅ Ｃｏ．， Ｌｔｄ． 関節運動範囲が制限されるコネクタ
WO2021215143A1 (ja) * 2020-04-23 2021-10-28 株式会社オートネットワーク技術研究所 コネクタ装置
US20220085549A1 (en) * 2020-09-17 2022-03-17 Carlisle Interconnect Technologies, Inc. Adjustable Push On Connector/Adaptor
WO2024024452A1 (ja) * 2022-07-25 2024-02-01 株式会社オートネットワーク技術研究所 コネクタ

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02295081A (ja) * 1989-05-09 1990-12-05 Orient Micro Ueebu:Kk 同軸コネクタ
US6497579B1 (en) * 1999-03-02 2002-12-24 Huber+Suhner Ag Coaxial connection with a tiltable adapter for a printed circuit board
JP2018206740A (ja) * 2017-06-09 2018-12-27 モレックス エルエルシー コネクタアセンブリ
JP2021077637A (ja) * 2019-11-08 2021-05-20 ギガレーン カンパニー リミテッドＧｉｇａｌａｎｅ Ｃｏ．， Ｌｔｄ． 関節運動範囲が制限されるコネクタ
WO2021215143A1 (ja) * 2020-04-23 2021-10-28 株式会社オートネットワーク技術研究所 コネクタ装置
US20220085549A1 (en) * 2020-09-17 2022-03-17 Carlisle Interconnect Technologies, Inc. Adjustable Push On Connector/Adaptor
WO2024024452A1 (ja) * 2022-07-25 2024-02-01 株式会社オートネットワーク技術研究所 コネクタ

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