Coaxial connector and connection structure of the coaxial connector

Abstract

To realize that a coaxial connector is hardly interfered with a mating side coaxial connector even if the coaxial connector is inclined to a center shaft of the mating side coaxial connector.SOLUTION: A coaxial connector 70 is a coaxial connector connected to a coaxial connector 40 for a substrate, and comprises: an inner conductor 80; and an outer conductor 90 surrounding an outer periphery side of the inner conductor. At least one of the inner conductor and the outer conductor includes cylinder parts 82 and 92 to which mating side terminals 50 and 60 of a mating side coaxial connector are connected. Each cylinder part is connected to a mating side terminal in a state where the mating side terminal is arranged to the inner peripheral side or the outer peripheral side of each cylinder part. A part that is faced to the mating side terminal of a tip end peripheral edge of each cylinder part includes interference avoidance surfaces 83 and 93 that are inclined to a side where is far from the mating side terminal so as to be directed to the tip end side of each cylinder part.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present disclosure relates to a coaxial connector and a connection structure for the coaxial connector. [Background technology]

[0002] Patent Document 1 discloses a coaxial connector assembly having a first coaxial connector, a second coaxial connector, and a third coaxial connector. Patent Document 1 discloses that a floating structure is formed between the first coaxial connector and the second coaxial connector, and between the second coaxial connector and the third coaxial connector, allowing relative movement in the axial direction and the radial direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2020-47360 A Summary of the Invention [Problem to be solved by the invention]

[0004] When the radial misalignment between a pair of coaxial connectors increases, the inclination of one coaxial connector relative to the other coaxial connector increases, which may cause interference between the two coaxial connectors.

[0005] In view of the above, an object of the present disclosure is to make it difficult for a coaxial connector to interfere with a mating coaxial connector even if the coaxial connector is tilted with respect to the central axis of the mating coaxial connector. [Means for solving the problem]

[0006] The coaxial connector of the present disclosure is a coaxial connector connected to a mating coaxial connector, and comprises an inner conductor and an outer conductor surrounding the outer periphery of the inner conductor, at least one of the inner conductor and the outer conductor has a tubular portion to which a mating terminal of the mating coaxial connector is connected, the tubular portion is connected to the mating terminal with the mating terminal arranged on the inner or outer periphery of the tubular portion, and a portion of the tip periphery of the tubular portion that faces the mating terminal has an interference avoidance surface that inclines away from the mating terminal as it approaches the tip side of the tubular portion. Effect of the Invention

[0007] According to the present disclosure, even if the coaxial connector is tilted with respect to the central axis of the mating coaxial connector, the coaxial connector is unlikely to interfere with the mating coaxial connector. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a device including a coaxial connector and a coaxial connector connection structure according to an embodiment. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Diagram 3] FIG. 3 is a perspective view showing a connection structure of a coaxial connector. [Figure 4] FIG. 4 is an exploded perspective view showing the same connection structure. [Diagram 5] FIG. 5 is an enlarged cross-sectional view of FIG. [Figure 6] FIG. 6 is a perspective view showing the tip of a coaxial connector. [Figure 7] FIG. 7 is a cross-sectional view showing the connection structure of a coaxial connector that is connected at an angle. [Figure 8] FIG. 8 is a partial cross-sectional view of FIG. [Figure 9] FIG. 9 is a cross-sectional view of another portion of FIG. [Figure 10] FIG. 10 is a partial cross-sectional view showing an interference avoidance surface according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] [Description of the embodiments of the present disclosure] First, the embodiments of the present disclosure will be listed and described.

[0010] The coaxial connector of the present disclosure is as follows.

[0011] (1) A coaxial connector to be connected to a mating coaxial connector, comprising an inner conductor and an outer conductor surrounding the outer periphery of the inner conductor, at least one of the inner conductor and the outer conductor having a tubular portion to which a mating terminal of the mating coaxial connector is connected, the tubular portion is connected to the mating terminal with the mating terminal disposed on the inner or outer periphery of the tubular portion, and a portion of a tip periphery of the tubular portion facing the mating terminal has an interference avoidance surface that slopes away from the mating terminal as it approaches the tip side of the tubular portion.

[0012] When connecting a coaxial connector to a mating coaxial connector, if the coaxial connector is tilted with respect to the central axis of the mating coaxial connector, the tip edge of the tubular portion may approach the mating terminal. According to this coaxial connector, the portion of the tip edge of the tubular portion that faces the mating terminal is tilted away from the mating terminal as it approaches the tip of the tubular portion. Therefore, even if the tip edge of the tubular portion approaches the mating terminal, contact with the mating terminal is suppressed. As a result, even if the coaxial connector is tilted with respect to the central axis of the mating coaxial connector, the coaxial connector is unlikely to interfere with the mating coaxial connector.

[0013] (2) In the coaxial connector of (1), the interference avoidance surface may extend in an annular shape along a peripheral edge of a tip end of the cylindrical portion.

[0014] In this case, no matter in what direction the coaxial connector is tilted with respect to the central axis of the mating coaxial connector, the coaxial connector is unlikely to interfere with the mating coaxial connector.

[0015] (3) In the coaxial connector of (1) or (2), the interference avoidance surface may guide an elastic piece of the mating terminal at a peripheral edge of a tip end of the cylindrical portion.

[0016] In this case, the elastic piece is guided by the interference avoidance surface and can move smoothly to the inner or outer periphery of the cylindrical portion.

[0017] (4) A coaxial connector according to any one of (1) to (3), wherein the interference avoidance surface is formed on one of the inner and outer circumferential sides of the tubular portion, and the surface on the other of the inner and outer circumferential sides of the tubular portion is formed in a shape having a continuous constant diameter portion along a central axis of the tubular portion.

[0018] In this case, for example, the end of the cylindrical portion can be chamfered to easily form the interference avoidance surface.

[0019] (5) A coaxial connector according to any one of (1) to (4), wherein the interference avoidance surface is formed on one of the inner and outer circumferential sides of the tubular portion, and the surface on the other of the inner and outer circumferential sides of the tubular portion may be formed in a shape that is inclined in the same direction as the inclination of the interference avoidance surface.

[0020] In this case, for example, the interference avoidance surface can be easily formed by bending the end of the cylindrical portion.

[0021] (6) In the coaxial connector of (5), a slit may be formed on a peripheral edge of a tip end of the cylindrical portion to divide the interference avoidance surface.

[0022] This makes it possible to easily form an interference avoidance surface divided by slits over the entire peripheral edge of the tip of the cylindrical portion.

[0023] (7) In the coaxial connector of (6), the width of the slit may be smaller than the width of the elastic piece of the mating terminal.

[0024] This allows the elastic piece to be smoothly guided to the inner or outer periphery of the cylindrical portion without getting stuck in the slit.

[0025] (8) A coaxial connector according to any one of (1) to (7), wherein the inner conductor includes an inner conductor tubular portion as the tubular portion, the mating terminal is inserted into the inner conductor tubular portion, and an inner interference avoidance surface as the interference avoidance surface is formed on an inner peripheral portion of a tip edge of the inner conductor tubular portion.

[0026] When a mating terminal is inserted into the inner conductor tube portion, if the inner conductor is significantly tilted with respect to the mating terminal, it is considered that the inner peripheral portion of the tip peripheral edge of the inner conductor tube portion is likely to interfere with the mating terminal. If an inner interference avoidance surface is formed on the inner peripheral portion of the tip peripheral edge of the inner conductor tube portion as an interference avoidance surface, the inner peripheral portion of the tip peripheral edge of the inner conductor tube portion is less likely to interfere with the mating terminal even if the inner conductor is significantly tilted with respect to the mating terminal.

[0027] (9) A coaxial connector according to any one of (1) to (8), wherein the outer conductor includes an outer conductor tubular portion as the tubular portion, the outer conductor tubular portion is inserted into the mating terminal, and an outer interference avoidance surface as the interference avoidance surface is formed on an outer peripheral portion of a tip periphery of the outer conductor tubular portion.

[0028] When a mating terminal is inserted into the outer conductor tube portion, if the outer conductor is significantly tilted with respect to the mating terminal, it is considered that the outer peripheral portion of the tip periphery of the outer conductor tube portion is likely to interfere with the mating terminal. If an outer interference avoidance surface is formed on the outer peripheral portion of the tip periphery of the outer conductor tube portion as an interference avoidance surface, the outer peripheral portion of the tip periphery of the tube portion is unlikely to interfere with the mating terminal even if the outer conductor is significantly tilted with respect to the mating terminal.

[0029] The connection structure of the coaxial connector of the present disclosure is as follows.

[0030] (10) A coaxial connector connection structure comprising: a coaxial connector according to any one of (1) to (9); and a mating coaxial connector, the mating coaxial connector having a mating inner conductor and a mating outer conductor surrounding an outer periphery of the mating inner conductor, the mating inner conductor having an inner elastic piece that elastically contacts the inner conductor, and the mating outer conductor having an outer elastic piece that elastically contacts the outer conductor.

[0031] In this case, since the mating inner conductor has an inner elastic piece that elastically contacts the inner conductor, and the mating outer conductor has an outer elastic piece that elastically contacts the outer conductor, the coaxial connector can be connected to the mating coaxial connector even if the coaxial connector is tilted relative to the mating coaxial connector by elastically deforming the inner elastic piece and the outer elastic piece. In this case, the coaxial connector can be made less likely to interfere with the mating coaxial connector by the interference avoidance surface.

[0032] (11) In the connection structure of a coaxial connector of (10), the mating coaxial connector may have a mating dielectric located between a base end of the mating inner conductor and a base end of the mating outer conductor, and the mating dielectric may have an annular recess facing the coaxial connector.

[0033] In this case, since the mating dielectric has an annular recess, even if the coaxial connector is connected in an inclined state to the mating coaxial connector, the outer conductor tube portion is unlikely to interfere with the mating dielectric.

[0034] [Details of the embodiment of the present disclosure] Specific examples of the coaxial connector and the 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.

[0035] [Embodiment] Hereinafter, a coaxial connector connection structure according to an embodiment will be described. Fig. 1 is a perspective view showing a device 10 including a coaxial connector 70 and a coaxial connector connection structure 28. Fig. 2 is a cross-sectional view taken along line II-II in Fig. 1.

[0036] <Overall configuration of the equipment> 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.

[0037] The device 10 includes a case 12, an electric component 20, and an external connection coaxial connector 30. The electric component 20 is accommodated in the case 12. The external connection coaxial connector 30 is a connector for connecting the electric component 20 to an external electric component. For example, the external connection coaxial connector 30 is a connector to which a cable connected to the external electric component is connected.

[0038] The case 12 includes a first case 13 and a second case 14. The first case 13 and the second case 14 are formed of, for example, resin. The first case 13 and the second case 14 are combined to form the rectangular box-shaped case 12 that houses the electric 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.

[0039] More specifically, a holding tube portion 16 is provided to protrude from the bottom 15 of the case 12. The holding tube portion 16 is a cylinder and protrudes outward from the center of the bottom portion 15. The inner opening of the holding tube portion 16 opens into the second case 14, and the outer opening of the holding tube portion 16 opens to the outside of the second case 14. A holding partition portion 17 is formed in the middle of the holding tube portion 16 in the direction along the central axis X. In this embodiment, the holding partition portion 17 is formed in the middle of the holding tube portion 16 in the direction along the central axis X, near the inner opening. The holding partition portion 17 divides the space of the holding tube portion 16 into the space on the inner opening side and the space on the outer opening side. A holding hole 17h is formed in the holding partition portion 17, and the coaxial connector 30 for external connection is inserted and held in the holding hole 17h.

[0040] The coaxial connector 30 for external connection comprises an inner conductor 32 for external connection, a dielectric material 34 for external connection, and an outer conductor 36 for external connection.

[0041] The external connection inner conductor 32 is formed in a long and 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 opposite-side inner conductor that is inserted into and connected to an inner conductor 80 described later. The external connection dielectric 34 is formed of an insulator such as resin, and surrounds the periphery of 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 periphery of the external connection dielectric 34. The external connection outer conductor 36 is an example of an opposite-side outer conductor to which an outer conductor 90 is connected.

[0042] The electric component 20 is, for example, a mounting board on which electronic components are mounted. When the device 10 is a camera device, the electric 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 an image of the outside scenery by rotating the lens or window. Hereinafter, the first case 13 side to which the image sensor 22 faces may be referred to as the front side, and the opposite second case 14 side may be referred to as the rear side.

[0043] A coaxial connector connection structure 28 is incorporated into the device 10. The coaxial connector connection structure 28 is a connection structure between a coaxial connector 40 for a board and a coaxial connector 70.

[0044] In this embodiment, the board coaxial connector 40 is provided on the surface of the circuit board 21 opposite to the imaging element 22. The board coaxial connector 40 is fixed to the circuit board 21. The board coaxial connector 40 is an example of a mating coaxial connector to be connected to the coaxial connector 70.

[0045] The coaxial connector for circuit board 40 includes a mating inner conductor 50 and a mating outer conductor 60 surrounding the outer periphery of the mating inner conductor 50. The coaxial connector for circuit board 40 may further include a mating dielectric 42 located between the mating inner conductor 50 and the mating outer conductor 60.

[0046] The mating dielectric 42 surrounds the mating inner conductor 50. The mating dielectric 42 is formed of an insulator. The mating outer conductor 60 surrounds the mating dielectric 42. The base end of the mating inner conductor 50 and the base end of the mating outer conductor 60 are fixed to the circuit board 21 by soldering or the like. As a result, the mating inner conductor 50 and the mating 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 board coaxial connector 40 protrudes from the circuit board 21 toward the external connection coaxial connector 30.

[0047] The coaxial connector 70 is connected to the coaxial connector for board 40. The coaxial connector 70 includes an inner conductor 80, an outer conductor 90 surrounding the outer periphery of the inner conductor 80, and a dielectric 72 located between the inner conductor 80 and the outer conductor 90. The dielectric 72 surrounds the periphery of the inner conductor 80. The dielectric 72 is made of an insulator. The outer conductor 90 surrounds the periphery of the dielectric 72. The coaxial connector 70 is connected to the coaxial connector for board 40 in a state in which the mating inner conductor 50 is inserted and connected to the inner conductor 80 and the outer conductor 90 is inserted and connected to the mating outer conductor 60. The coaxial connector 70 further protrudes from the coaxial connector for board 40 toward the coaxial connector for external connection 30. The coaxial connector 70 relays and connects the coaxial connector for board 40 and the coaxial connector for external connection 30. The coaxial connector 70 is connected to the coaxial connector for board 40 and the coaxial connector for external connection 30 in a manner that allows it to change its position. The coaxial connector 70 may be understood as a relay coaxial connector.

[0048] The coaxial connector 30 for external connection is provided on the second case 14 side, i.e., on the rear side of the case 12. Inside the case 12, a coaxial connector 70 is connected to the coaxial connector 30 for external connection. When an external cable is connected to the coaxial connector 30 for external connection, an external electrical component to which the cable is connected is electrically connected to the electrical component 20 inside the case 12.

[0049] The circuit board 21 is supported at a fixed position within the case 12. In terms of design, the position of the board coaxial connector 40 relative to the external connection coaxial connector 30 is set at a fixed position. However, within the tolerance range, the position of the board coaxial connector 40 relative to the external connection coaxial connector 30 may deviate from the designed position.

[0050] In this embodiment, the insertion amount of the coaxial connector 70 into the coaxial connector for board 40 can be adjusted within a range in which the mating inner conductor 50 and the inner conductor 80 can maintain electrical contact, and the mating outer conductor 60 and the outer conductor 90 can maintain electrical contact. The coaxial connector 70 can be inserted and connected in a tilted state with respect to the coaxial connector for board 40 and the coaxial connector for external connection 30. As a result, even if the distance of the coaxial connector for external connection 30 from the coaxial connector for board 40 varies during the assembly work of the device 10 or in the completed state, the distance variation can be absorbed by adjusting the insertion amount of the coaxial connector 70 into the coaxial connector for board 40. Even if the coaxial connector for external connection 30 is deviated from the position coaxially facing the coaxial connector for board 40, the tilt of the coaxial connector 70 with respect to the coaxial connector for board 40 and the coaxial connector for external connection 30 absorbs the positional deviation.

[0051] If the inclination of the coaxial connector 70 relative to the board coaxial connector 40 becomes large, a part of the peripheral edge of the outer conductor 90 on the circuit board 21 side approaches the mating outer conductor 60 and may interfere with the mating outer conductor 60. Also, a part of the peripheral edge of the inner conductor 80 on the circuit board 21 side approaches the mating inner conductor 50 and may interfere with the mating inner conductor 50.

[0052] For example, it is considered that the inclination of the coaxial connector 70 relative to the coaxial connector 40 for the board becomes greatest when, within the tolerance range, the coaxial connector 70 is closest to the coaxial connector 40 for the board and the coaxial connector 30 for external connection is most displaced from the position coaxially facing the coaxial connector 40 for the board. When the inclination of the coaxial connector 70 relative to the coaxial connector 40 for the board becomes greatest, there is a strong demand to avoid interference of the coaxial connector 70 with the coaxial connector 40 for the board.

[0053] In addition, the inner conductor 80 and the outer conductor 90 are designed to ensure a reliable connection and to obtain desired communication performance, taking into account the relative positional relationship between the coaxial connectors 40 and 70, which may vary within the tolerance range. For this reason, it may be difficult to avoid the above-mentioned interference by shortening the protruding lengths of the tip peripheries of the inner conductor 80 and the outer conductor 90.

[0054] A configuration for avoiding the above-mentioned interference will be described assuming a connection structure between the coaxial connector 40 for the board and the coaxial connector 70.

[0055] <About the connection structure of coaxial connectors> The coaxial connector connection structure 28 will be described in more detail. 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 cross-sectional view of Fig. 3. Fig. 6 is a perspective view showing the tip of the coaxial connector 70. In Fig. 6, the elastic pieces 56, 66 are partially shown.

[0056] First, the coaxial connector 40 for the board and the coaxial connector 70 will be described in more detail, and then the structure for avoiding interference will be described in more detail.

[0057] <About coaxial connectors for circuit boards> As described above, the coaxial connector for circuit board 40 includes the mating inner conductor 50, the mating outer conductor 60, and the mating dielectric body .

[0058] The mating inner conductor 50 is an elongated conductive member. In this embodiment, the mating inner conductor 50 is formed by pressing a metal plate. The first inner conductor may be formed by cutting a metal material.

[0059] More specifically, the mating inner conductor 50 includes a mating inner conductor tubular portion 52 and an inner elastic piece 56 .

[0060] The mating inner conductor tube portion 52 is formed in a tubular shape, more specifically, in a cylindrical shape. The base end of the mating inner conductor 50 is accommodated and held in the mating dielectric 42. In the board coaxial connector 40, the tip is the end to which the coaxial connector 70 is connected, and the base end is the end opposite to the tip, in this case, the end facing the circuit board 21.

[0061] A positioning piece 53 is formed so as to protrude outward from a circumferential portion at the base end of the mating internal conductor tube portion 52. The positioning piece 53 is a plate-shaped portion along the central axis of the mating internal 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. In this embodiment, the mating internal conductor tube portion 52 is formed by pressing the plate-shaped portions into a tube. A plate-shaped portion protrudes outward from each of two adjacent edges at the joint of the tube, and the positioning piece 53 is formed by the two plate-shaped portions overlapping each other.

[0062] A retaining projection 53p that hooks onto the bottom of the positioning groove 44 of the counterpart 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 counterpart internal conductor tube portion 52 is unlikely to come off toward the tip side of the counterpart dielectric 42. Here, the retaining projection 53p is formed in a triangular plate shape. The edge of the retaining projection 53p on the tip side of the counterpart internal 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 counterpart internal conductor tube portion 52. This makes it easier to press the retaining projection 53p into the base end side of the counterpart internal conductor tube portion 52 with respect to the positioning groove 44, and makes it difficult for the retaining projection 53p to come off toward the tip side of the counterpart internal conductor tube portion 52. The positioning piece 53 and the retaining projection 53p may be omitted.

[0063] The mating inner conductor tube portion 52 may be formed with a locking piece 52a that is hooked onto the inner peripheral surface of the mating dielectric 42 when the mating inner conductor tube portion 52 is press-fitted into the mating 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 mating inner conductor tube portion 52.

[0064] An inner elastic piece 56 protrudes from the tip of the mating inner conductor tube portion 52. In this embodiment, multiple (three in this embodiment) inner elastic pieces 56 extend at intervals in the circumferential direction from the tip of the mating inner conductor tube portion 52. Preferably, the multiple inner elastic pieces 56 are positioned at equal intervals around the central axis X of the mating inner conductor tube portion 52.

[0065] The inner elastic piece 56 includes an inclined portion 56a inclined outward from the tip of the mating inner conductor tube portion 52, and a curved portion 56b continuing from the tip of the inclined portion 56a and forming an outwardly convex curved shape.

[0066] When the multiple inner elastic pieces 56 are inserted into the inner conductor 80, the inclined portions 56a are elastically deformed inward, while the outward apexes of the curved portions 56b are elastically pressed against the inner circumferential surface of the inner conductor 80. As a result, the inner elastic pieces 56 are in elastic contact with the inner conductor 80, and the mating inner conductor 50 is kept electrically connected to the inner conductor 80.

[0067] The number of elastic pieces may be two, or four or more.

[0068] The mating dielectric 42 is formed into a disk shape from resin or the like. The maximum thickness dimension of the mating dielectric 42 is smaller than the length dimension of the mating inner conductor tube portion 52. The mating dielectric 42 is, for example, a molded resin part.

[0069] An insertion hole 43 into which the base end of the counterpart inner conductor 50, more specifically, the base end of the counterpart inner conductor tubular portion 52, is inserted is formed in the center of the counterpart dielectric 42. Also, a positioning groove 44 into which the positioning piece 53 is fitted is formed. The positioning groove 44 is recessed from a portion of the circumferential direction of the insertion hole 43 toward the outer periphery and is formed as a groove extending along the central axis X.

[0070] Then, by inserting the mating inner conductor tube portion 52 into the insertion hole 43, the mating inner conductor 50 is inserted and held in the mating dielectric 42. Preferably, the mating inner conductor tube portion 52 is press-fitted into the insertion hole 43 and held therein.

[0071] If the mating inner conductor is a machined product, the above press-fit structure makes it easy to hold the mating inner conductor firmly against the mating dielectric. If the mating 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 peripheral surface of the positioning groove 44 holds the positioning piece 53, making it easy for the mating dielectric 42 to hold the mating inner conductor 50 firmly.

[0072] In addition, the anti-slip projection 53p of the positioning piece 53 is caught so as to bite into the bottom of the positioning groove 44, making it difficult for the mating inner conductor 50 to come out of the mating dielectric 42, and the mating inner conductor 50 is held more firmly.

[0073] In addition, a retaining annular protrusion 45 that protrudes annularly toward the tip side of the mating inner conductor 50 is formed on a portion of the mating dielectric 42 surrounding the insertion hole 43. The retaining annular protrusion 45 retains the mating inner conductor tube portion 52, whereby the mating inner conductor 50 is held more firmly and is less likely to tilt relative to the mating dielectric 42.

[0074] The outer peripheral surface of the mating dielectric 42 is formed in a short cylindrical shape that can be inserted into the inner peripheral portion of the mating outer conductor 60. An outer peripheral portion of the mating dielectric 42 on the mating outer conductor 60 side is formed with an outer peripheral annular protrusion 46 that protrudes in an annular shape toward the tip side of the mating inner conductor 50. The outer peripheral surface of the mating 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 mating dielectric 42 can face the inner peripheral surface of the mating outer conductor 60 over a wide area. This makes it easy for the mating dielectric 42 to be firmly held relative to the mating outer conductor 60, and the mating outer conductor 60 is less likely to tilt relative to the mating dielectric 42. This makes it easy for the mating inner conductor 50 and the mating outer conductor 60 to be kept in a coaxial positional relationship.

[0075] The portion of the mating dielectric 42 facing the coaxial connector 70 has an annular recess 47 formed therein, which is recessed between a retaining annular protrusion 45 on the inner circumference of the mating dielectric 42 and an outer peripheral annular protrusion 46 on the outer circumference.

[0076] When the coaxial connector 70 is significantly tilted relative to the board coaxial connector 40 , if the peripheral end edge of the outer conductor 90 comes too close to the mating dielectric 42 , the peripheral end edge can enter the annular recess 47 .

[0077] The mating outer conductor 60 is made of a conductive material such as metal, and surrounds the mating dielectric 42. Therefore, the mating dielectric 42 is a cylindrical member interposed between the mating inner conductor 50 and the mating outer conductor 60. The mating outer conductor 60 is formed, for example, by pressing a metal plate.

[0078] In this embodiment, the mating outer conductor 60 includes a mating outer conductor tubular portion 62 and an outer elastic piece 66 protruding from the tip of the mating outer conductor tubular portion 62 .

[0079] The mating outer conductor tubular portion 62 is formed in a tubular shape, more specifically, a cylindrical shape, inside which the mating dielectric 42 can be placed. The mating dielectric 42 is accommodated and held in the base end portion of the mating outer conductor tubular portion 62.

[0080] The mating outer conductor tube portion 62 may be formed with a locking piece 62a that is hooked onto the outer peripheral surface of the mating dielectric 42 when the mating dielectric 42 is press-fitted.

[0081] An outer elastic piece 66 protrudes from the tip of the mating outer conductor tube portion 62. In this embodiment, a plurality of (eight here) outer elastic pieces 66 extend at intervals in the circumferential direction from the tip of the mating outer conductor tube portion 62. Preferably, the multiple outer elastic pieces 66 are positioned at equal intervals around the central axis X of the mating outer conductor tube portion 62.

[0082] The outer elastic piece 66 includes an inclined portion 66a inclined inwardly from the tip of the mating outer conductor tube portion 62, and a curved portion 66b continuing to the tip of the inclined portion 66a and forming an inwardly convex curved shape.

[0083] When the multiple outer elastic pieces 66 are fitted onto the outer conductor 90, the inclined portions 66a are elastically deformed outward, while the inward apexes of the curved portions 66b are elastically pressed against the outer peripheral surface of the outer conductor 90. As a result, the outer elastic pieces 66 are in elastic contact with the outer conductor 90, and the mating outer conductor 60 is kept electrically connected to the outer conductor 90.

[0084] The number of elastic pieces may be seven or less, or nine or more.

[0085] In the direction of the central axis X, the length dimension of the mating outer conductor tube portion 62 is greater than the thickness dimension of the mating dielectric 42. In this embodiment, the length dimension of the mating outer conductor tube portion 62 is greater than the length dimension of the mating inner conductor 50. In addition, the base end of the outer elastic piece 66 is positioned farther away from the mating dielectric 42 than the base end of the inner elastic piece 56. Furthermore, the tip end of the outer elastic piece 66 is positioned farther away from the mating dielectric 42 than the tip end of the inner elastic piece 56. However, the curved portions 56b, 66b can contact the inner conductor 80 or the outer conductor 90 at the same position in the central axis X.

[0086] The coaxial connector for board 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 coaxial connector for board 40 from all sides and suppress contact with other members.

[0087] <About coaxial connectors> As described above, the coaxial connector 70 comprises the inner conductor 80, the outer conductor 90, and the dielectric material 72.

[0088] The inner conductor 80 is an elongated conductive member. In this embodiment, the inner conductor 80 is formed by pressing a metal plate. More specifically, the inner conductor 80 includes an inner conductor tubular portion 82 and an inner conductor extension tubular portion 86.

[0089] The inner conductor tube portion 82 is formed in a tubular shape, more specifically, in a cylindrical shape. An open end of the inner conductor tube portion 82 faces the side of the board coaxial connector 40. The inner conductor tube portion 82 is a portion to be connected to the mating inner conductor 50.

[0090] More specifically, the inner conductor tube portion 82 is a thin tube that is elongated along the central axis X. The inner diameter of the inner conductor tube portion 82 is smaller than the outer diameter of an imaginary circle that connects the tops of the multiple inner elastic pieces 56. The multiple inner elastic pieces 56 can elastically contact the inner circumferential surface of the inner conductor tube portion 82 while elastically deforming inward.

[0091] In the direction of the central axis X, the inner conductor tube portion 82 is longer than the inner elastic piece 56. In the direction of the central axis X, the apex of the curved portion 56b of the inner elastic piece 56 can come into contact with any position on the inner circumferential surface of the inner conductor tube portion 82, thereby connecting the mating inner conductor 50 and the inner conductor 80. This makes it possible to accommodate misalignment between the mating inner conductor 50 and the inner conductor 80 in the direction of the central axis X.

[0092] The inner conductor extension tubular portion 86 is located on the opposite side of the inner conductor tubular portion 82 from the coaxial connector for board 40. In this embodiment, the inner conductor extension tubular portion 86 is thinner than the inner conductor tubular portion 82. The inner conductor extension tubular portion 86 is connected to the inner conductor tubular portion 82 via a tapered portion 81. The tapered portion 81 is a tapered portion that gradually becomes thinner from the inner conductor tubular portion 82 toward the inner conductor extension tubular portion 86. The inner conductor extension tubular portion may be connected to the inner conductor tubular portion via a step portion.

[0093] The inner conductor extension tube portion 86 may have an elastic piece 87 protruding 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. When the inner conductor for external connection 32 is sandwiched between the two elastic pieces 87, the inner conductor 80 is connected to the inner conductor for external connection 32.

[0094] The inner conductor extension tubular portion 86 may be formed with a partial locking piece 86 a that can be locked to the dielectric 72 .

[0095] The dielectric 72 is made of resin etc. The dielectric 72 is, for example, a molded resin part.

[0096] The dielectric 72 is formed in a tubular shape capable of accommodating at least a portion of the inner conductor 80. In this embodiment, the dielectric 72 is formed in a cylindrical shape. An inner conductor extension tubular portion 86 is accommodated within the dielectric 72. The internal space of the inner conductor extension tubular portion 86 is large enough to hold the base end of the inner conductor extension tubular portion 86 in a press-fitted state and to allow elastic deformation of the elastic piece 87 in the inward and outward directions.

[0097] One end of the dielectric 72 comes into contact with the tapered portion 81, so that the dielectric 72 can be positioned relative to the inner conductor 80. The inner conductor tube portion 82 extends further toward the coaxial connector for board 40 side than the dielectric 72.

[0098] An outer conductor 90 is disposed on the outer periphery of the dielectric 72. The outer conductor 90 is made of a conductive material such as metal, and surrounds the dielectric 72. The outer conductor 90 is formed, for example, by pressing a metal plate.

[0099] The outer conductor 90 includes an outer conductor tubular portion 92 and an outer conductor extension tubular portion 96 .

[0100] The outer conductor tube portion 92 is formed in a tubular shape, more specifically, in a cylindrical shape. An open end of the outer conductor tube portion 92 faces the side of the board coaxial connector 40. The outer conductor tube portion 92 is a portion to be connected to the mating outer conductor 60.

[0101] The outer conductor tube portion 92 is located on the outer circumferential side of the inner conductor tube portion 82 with a gap therebetween. The outer diameter of the outer conductor tube portion 92 is larger than the outer diameter of an imaginary circle connecting the tops of the multiple outer elastic pieces 66. The multiple outer elastic pieces 66 can elastically contact the outer circumferential surface of the outer conductor tube portion 92 while elastically deforming outward.

[0102] In the direction of the central axis X, the outer conductor tube portion 92 is longer than the outer elastic piece 66. In the direction of the central axis X, the apex of the curved portion 66b of the outer elastic piece 66 can come into contact with any position on the outer circumferential surface of the outer conductor tube portion 92, thereby connecting the mating outer conductor 60 and the outer conductor 90. This makes it possible to accommodate misalignment between the mating outer conductor 60 and the outer conductor 90 in the direction of the central axis X.

[0103] The outer conductor extension tubular portion 96 is located on the opposite side of the outer conductor tubular portion 92 from the coaxial connector for board 40. In this embodiment, the outer conductor extension tubular portion 96 is thinner than the outer conductor tubular portion 92. The outer conductor extension tubular portion 96 is connected to the outer conductor tubular portion 92 via a tapered portion 91. The tapered portion 91 is a tapered portion that gradually becomes thinner from the outer conductor tubular portion 92 toward the outer conductor extension tubular portion 96. The outer conductor extension tubular portion may be connected to the outer conductor tubular portion via a step portion.

[0104] The outer conductor extension tube portion 96 may have an elastic piece 97 protruding toward the tip side. The elastic piece 97 is configured to be elastically deformable 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, whereby the outer conductor 90 is connected to the external connection outer conductor 36.

[0105] The outer conductor extension tubular portion 96 may be formed with a partial locking piece 96 a that can be locked to the dielectric 72 .

[0106] <Configuration for avoiding interference> At least one of the inner conductor 80 and the outer conductor 90 has a cylindrical portion 82, 92 to which a mating terminal of the coaxial connector for board 40 is connected. In this embodiment, the mating inner conductor 50 of the coaxial connector for board 40 is an example of a mating terminal, and the mating outer conductor 60 is also an example of a mating terminal.

[0107] The inner conductor 80 has an inner conductor tubular portion 82 as a tubular portion. The inner conductor tubular portion 82 is connected to the mating inner conductor 50 as a mating terminal, with the mating inner conductor 50 being disposed on the inner peripheral side of the inner conductor tubular portion 82.

[0108] The outer conductor 90 has a cylindrical portion, that is, an outer conductor tubular portion 92. The outer conductor tubular portion 92 is connected to a mating outer conductor 60 as a mating terminal, with the mating outer conductor 60 being disposed on the outer periphery of the outer conductor tubular portion 92.

[0109] The portions of the tip periphery of the tubular portions 82, 92 facing the mating inner conductor 50 or the mating outer conductor 60 as the mating terminal have interference avoidance surfaces 83, 93. The interference avoidance surfaces 83, 93 are formed as surfaces that incline toward the tip side of the tubular portions 82, 92 and move away from the mating inner conductor 50 or the mating outer conductor 60 as the mating terminal.

[0110] The following description focuses on the interference avoidance surface 83 of the inner conductor tube portion 82. The inner conductor tube portion 82 is located between the mating inner conductor 50 and the mating outer conductor 60, closer to the mating inner conductor 50 than the mating outer conductor 60. For this reason, when the coaxial connector 70 is tilted with respect to the board coaxial connector 40, the tip edge of the inner conductor tube portion 82 is more likely to come into contact with the mating inner conductor 50 than with the mating outer conductor 60.

[0111] Therefore, the interference avoidance surface 83 is formed on the inner peripheral portion of the tip periphery of the inner conductor tube portion 82 that faces the inner elastic piece 56. Moreover, the interference avoidance surface 83 is formed on a surface that slopes away from the inner elastic piece 56 as it approaches the tip side of the inner conductor tube portion 82. In other words, the interference avoidance surface 83 is formed so as to slope outward as it approaches the tip side of the inner conductor tube portion 82. The interference avoidance surface 83 may also be referred to as an inner interference avoidance surface 83.

[0112] The interference avoidance surface 83 preferably extends in an annular shape along the periphery of the tip end of the inner conductor tube portion 82. In this case, even if the inner conductor tube portion 82 is tilted in any direction relative to the mating inner conductor 50, interference between the inner conductor tube portion 82 and the mating inner conductor 50 can be easily avoided.

[0113] The interference avoidance surface 83 may be formed with a recess 83a that does not reach the base end of the interference avoidance surface 83. The recess 83a that does not reach the base end of the interference avoidance surface 83 does not negate the continuity of the interference avoidance surface 83 that extends in an annular shape along the tip periphery of the inner conductor tube portion 82.

[0114] A slit 83b for facilitating processing may be formed in the interference avoidance surface 83. The slit 83b (see FIG. 6) having a width S1 smaller than the width W1 of the inner elastic piece 56 does not negate the continuity of the interference avoidance surface 83 extending in an annular shape along the tip periphery of the inner conductor tube portion 82.

[0115] It is not essential that the interference avoidance surface 83 extends annularly along the tip periphery of the inner conductor tube portion 82. For example, when the inclination direction of the coaxial connector 70 relative to the board coaxial connector 40 is fixed, the interference avoidance surface may be formed at a partial location on the tip periphery of the inner conductor tube portion 82 that may interfere with the mating inner conductor due to the inclination.

[0116] The interference avoidance surface 83 is preferably formed at a position that guides the inner elastic piece 56 on the peripheral edge of the tip of the inner conductor tube portion 82. For example, when the connection posture between the coaxial connector 70 and the board coaxial connector 40 is constant around the central axis X, it is preferable that the interference avoidance surface 83 is formed at the same position as the inner elastic piece around the central axis X.

[0117] If the interference avoidance surface 83 extends in an overall ring shape along the tip periphery of the inner conductor tube portion 82, the interference avoidance surface 83 can guide the inner elastic piece 56 regardless of the connection posture of the coaxial connector 70 and the coaxial connector for board 40 around the central axis X.

[0118] There are no particular limitations on the method of formation of the interference avoidance surface 83, as long as it is a surface formed on the inner periphery of the tip periphery of the inner conductor tube portion 82. For example, the interference avoidance surface 83 may be formed by cutting the inner periphery of the tip periphery of the inner conductor tube portion 82, by rolling the tip periphery of the inner conductor tube portion 82 so that it becomes thinner toward the tip, by pressing and bending the tip periphery of the inner conductor tube portion 82, or by a combination of these processes.

[0119] In this embodiment, the interference avoidance surface 83 is formed by pressing and bending the peripheral edge of the tip of the inner conductor tube portion 82. In this case, both the inner peripheral surface and the outer peripheral surface of the peripheral edge of the tip of the inner conductor tube portion 82 are bent in the same direction. Therefore, the outer peripheral surface portion of the inner conductor tube portion 82 on the opposite side to the interference avoidance surface 83 is formed into a shape that is inclined along the interference avoidance surface 83 on the outer periphery side of the interference avoidance surface 83.

[0120] If the interference avoidance surface 83 is formed by pressing and bending the peripheral edge of the tip of the inner conductor tube portion 82, the interference avoidance surface 83 can be easily bent significantly.

[0121] The following description will focus on the interference avoidance surface 93 of the outer conductor tube portion 92.

[0122] The outer conductor tube portion 92 is located between the mating inner conductor 50 and the mating outer conductor 60, closer to the mating outer conductor 60 than to the mating inner conductor 50. Therefore, when the coaxial connector 70 is tilted with respect to the board coaxial connector 40, the tip edge of the outer conductor tube portion 92 is more likely to come into contact with the mating outer conductor 60 than with the mating inner conductor 50.

[0123] Therefore, the interference avoidance surface 93 is formed on an outer circumferential portion of the tip periphery of the outer conductor tube portion 92 that faces the outer elastic piece 66. Moreover, the interference avoidance surface 93 is formed on a surface that slopes away from the outer elastic piece 66 as it approaches the tip side of the outer conductor tube portion 92. In other words, the interference avoidance surface 93 is formed so as to slope inward as it approaches the tip side of the outer conductor tube portion 92. The interference avoidance surface 93 may be referred to as an outer interference avoidance surface 93.

[0124] The interference avoidance surface 93 preferably extends in an annular shape along the periphery of the tip end of the outer conductor tube portion 92. In this case, even if the outer conductor tube portion 92 is tilted in any direction relative to the mating outer conductor 60, interference between the outer conductor tube portion 92 and the mating outer conductor 60 is easily avoided.

[0125] The interference avoidance surface 93 may be formed with recesses 93a, 93b that do not reach the base end of the interference avoidance surface 93. The recesses 93a, 93b that do not reach the base end of the interference avoidance surface 93 do not negate the continuity of the interference avoidance surface 93 that extends in an annular shape along the tip periphery of the outer conductor tube portion 92.

[0126] It is not essential that the interference avoidance surface 93 extends annularly along the tip periphery of the outer conductor tube portion 92. For example, when the inclination direction of the coaxial connector 70 relative to the board coaxial connector 40 is fixed, the interference avoidance surface may be formed at a partial location on the tip periphery of the outer conductor tube portion 92 that may interfere with the mating outer conductor due to the inclination.

[0127] The interference avoidance surface 93 is preferably formed at a position that guides the outer elastic piece 66 on the peripheral edge of the tip of the outer conductor tube portion 92. For example, when the connection posture between the coaxial connector 70 and the board coaxial connector 40 is constant around the central axis X, it is preferable that the interference avoidance surface 93 is formed at the same position as the outer elastic piece around the central axis X.

[0128] If the interference avoidance surface 93 extends annularly along the tip periphery of the outer conductor tube portion 92, the interference avoidance surface 93 can guide the outer elastic piece 66 regardless of the connection posture of the coaxial connector 70 and the board coaxial connector 40 around the central axis X.

[0129] There is no limitation on the method of forming the interference avoidance surface 93, as long as it is a surface formed on the outer periphery of the tip periphery of the outer conductor tubular portion 92. For example, the interference avoidance surface 93 may be formed by cutting the outer periphery of the tip periphery of the outer conductor tubular portion 92, by rolling the tip periphery of the outer conductor tubular portion 92 so that it becomes thinner toward the tip, or by bending the tip periphery of the outer conductor tubular portion 92 by press processing (e.g., drawing).

[0130] In this embodiment, the interference avoidance surface 83 is formed by cutting the outer periphery of the tip periphery of the outer conductor tube portion 92. The process of cutting the outer periphery of the tip periphery of the outer conductor tube portion 92 to form the interference avoidance surface 93 may be a process called chamfering.

[0131] In this case, the inner circumferential part of the outer conductor tube portion 92 on the side opposite to the interference avoidance surface 93 is formed into a shape in which equal-diameter parts are continuous along the central axis X of the outer conductor tube portion 92. In other words, the inner circumferential surface of the outer conductor tube portion 92 retains the initial shape when the outer conductor tube portion 92 is processed into a circular shape.

[0132] If the inner circumferential portion of the outer conductor tube portion 92 on the side opposite to the interference avoidance surface 93 is formed in a shape in which constant-diameter portions are continuous along the central axis X, the distance between the outer conductor tube portion 92 and the central axis X is easily maintained constant. This makes it possible to reduce changes in the distance between the inner and outer conductors, making it easier to maintain good communication performance in the coaxial connector connection structure 28.

[0133] The larger the angle of the interference avoidance surfaces 83, 93 with respect to the central axis X, the easier it is to avoid interference with the peripheral tips of the cylindrical portions 82, 92. Also, the longer the length of the interference avoidance surfaces 83, 93 in the direction along the central axis X, the easier it is to avoid interference with the peripheral tips of the cylindrical portions 82, 92.

[0134] In this embodiment, the inclination of the interference avoidance surface 83 with respect to the central axis X is greater than the inclination of the interference avoidance surface 93 with respect to the central axis X. Conversely, the length of the interference avoidance surface 83 in the direction along the central axis X is shorter than the length of the interference avoidance surface 93 in the direction along the central axis X.

[0135] As a result, the peripheral edges of the tip ends of the cylindrical portions 82, 92 are each formed with an appropriate interference avoiding shape.

[0136] The inclination of the interference avoidance surfaces 83, 93 relative to the central axis X and the length in the direction along the central axis X should be set to values ​​capable of avoiding interference between the coaxial connectors 40, 70, taking into consideration the maximum inclination angle of the coaxial connector 70 relative to the coaxial connector for board 40 that can occur within the tolerance range.

[0137] <Connector connection operation and connection structure when tilted> When the coaxial connector 70 is connected to the coaxial connector for circuit board 40, the multiple inner elastic pieces 56 of the mating inner conductor 50 are inserted into the inner conductor tube portion 82, and the outer conductor tube portion 92 is inserted into the multiple outer elastic pieces 66 of the mating outer conductor 60.

[0138] At this time, the multiple inner elastic pieces 56 come into contact with the interference avoidance surface 83 of the inner conductor tube portion 82, whereby the multiple inner elastic pieces 56 are displaced inward and smoothly guided to the inner peripheral surface at the rear of the inner conductor tube portion 82 (see arrow P1 in Fig. 5). Also, the multiple outer elastic pieces 66 come into contact with the interference avoidance surface 93 of the outer conductor tube portion 92, whereby the multiple outer elastic pieces 66 are displaced outward and smoothly guided to the outer peripheral surface at the rear of the outer conductor tube portion 92 (see arrow P2 in Fig. 5).

[0139] This prevents the multiple inner elastic pieces 56 from getting caught on the peripheral tip edge of the inner conductor tube portion 82, or the multiple outer elastic pieces 66 from getting caught on the peripheral tip edge of the outer conductor tube portion 92, thereby ensuring smooth connection of the coaxial connector 70 to the coaxial connector for board 40.

[0140] When the coaxial connector 70 is properly connected to the coaxial connector 40 for the board, the central axis X of the coaxial connector 70 coincides with the central axis X of the coaxial connector 40 for the board, and the distance between the coaxial connector 40 for the board and the coaxial connector 70 is kept at a specified design distance (see FIG. 5).

[0141] Fig. 7 is a cross-sectional view of the connection structure 28 when the coaxial connector 70 is closest to the coaxial connector for board 40 and the coaxial connector for external connection 30 is most displaced from the position coaxially facing the coaxial connector for board 40, within the tolerance range. Figs. 8 and 9 are partial cross-sectional views of Fig. 7.

[0142] 7, the distance L2 of the coaxial connector 70 from the coaxial connector 40 for the board is smaller than the initial distance L1 in design by a distance L3. Also, the central axis Xa of the coaxial connector 70 is spaced from the central axis X of the coaxial connector 40 for the board by a distance L4.

[0143] In this case, part of the peripheral edge of the inner conductor 80 on the circuit board 21 side approaches the mating inner conductor 50. Also, part of the peripheral edge of the outer conductor 90 on the circuit board 21 side approaches the mating outer conductor 60. For this reason, if the peripheral edges of the inner conductor tube portion 82 and the outer conductor tube portion 92 remain in their initial shapes without any interference avoidance surfaces, they may come into contact with the outer conductor 90 or the inner conductor 80, respectively (see parts B1, B2 indicated by two-dot chain lines in Figures 8 and 9).

[0144] In this embodiment, interference avoidance surfaces 83, 93 are formed on the inner conductor tube portion 82 and the outer conductor tube portion 92, respectively, thereby effectively preventing the tip edges of the inner conductor tube portion 82 and the outer conductor tube portion 92 from coming into contact with the outer conductor 90 or the inner conductor 80.

[0145] Furthermore, within the tolerance range, there is a possibility that the inner conductor tube portion 82 may come closer to the mating dielectric 42. In this case, the peripheral edge of the tip of the inner conductor tube portion 82 can enter the annular recess 47 of the mating dielectric 42. This also prevents interference between the inner conductor tube portion 82 and the mating dielectric 42.

[0146] In order to increase the amount of avoidance of the interference avoidance surfaces 83, 93, the inner conductor tube portion 182 and the outer conductor tube portion 192 may be formed as in the modified example shown in FIG. 10. That is, the inner conductor tube portion 182 and the outer conductor tube portion 192 are each formed with a slit 183a, 193a along the central axis X. At least one slit 183a, 193a may be provided for each of the inner conductor tube portion 182 and the outer conductor tube portion 192. A plurality of slits 183a, 193a may be provided for each of the inner conductor tube portion 182 and the outer conductor tube portion 192, and in this case, a plurality of slits may be provided at equal intervals in the circumferential direction. The number, width, and length of the slits 183a, 193a may be set to a degree that does not cause deformation of the inner conductor tube portion 182 and the outer conductor tube portion 192 when connected.

[0147] In the inner conductor tube portion 182, the tip edge of the inner conductor tube portion 182 is widened toward the outer periphery by widening the slit 183a. The inner periphery of the portion widened toward the outer periphery serves as an interference avoidance surface 183 corresponding to the interference avoidance surface 83.

[0148] In the outer conductor tube portion 192, the tip edge of the outer conductor tube portion 192 is narrowed toward the inner circumference by narrowing the slit 193a. The outer periphery of the portion narrowed toward the inner circumference serves as an interference avoidance surface 193 corresponding to the interference avoidance surface 93.

[0149] In these cases, slits 183a, 193a can be used to widen the tip periphery of inner conductor tube portion 182 and outer conductor tube portion 192 toward the outer circumference or narrow it toward the inner circumference, making it easy to incline interference avoidance surfaces 183, 193 at a large angle and over a wide range, and as a result, it is easy to set a large amount of avoidance for interference avoidance.

[0150] It is preferable that the widths S1, S2 of the slits 183a, 193a are smaller than the width W1 of the inner elastic piece 56 and the width W3 of the outer elastic piece 66. This allows the inner elastic piece 56 and the outer elastic piece 66 to move smoothly along the inner circumferential surface of the inner conductor tube portion 182 or the outer circumferential surface of the outer conductor tube portion 192 without entering the slits 183a, 193a.

[0151] <Effects, etc.> According to the coaxial connector 70 and the coaxial connector connection structure 28 configured as described above, the portion of the tip periphery of the tubular portions 82, 92 facing the mating terminal, the mating inner conductor 50 or the mating outer conductor 60, is inclined away from the mating inner conductor 50 or the mating outer conductor 60 toward the tip side of the tubular portions 82, 92. Therefore, even if the tip periphery of the tubular portions 82, 92 approaches the mating inner conductor 50 or the mating outer conductor 60, contact with the mating inner conductor 50 or the mating outer conductor 60 is suppressed. As a result, even if the coaxial connector 70 is inclined with respect to the central axis X of the coaxial connector for board 40, the coaxial connector 70 is unlikely to interfere with the coaxial connector for board 40.

[0152] Furthermore, if the interference avoidance surfaces 83, 93 extend annularly along the tip periphery of the cylindrical portions 82, 92, the coaxial connector 70 is unlikely to interfere with the coaxial connector for board 40 regardless of the direction in which the coaxial connector 70 is tilted relative to the central axis X of the coaxial connector for board 40.

[0153] Furthermore, if the interference avoidance surfaces 83, 93 are formed in a position on the tip peripheral edge of the tubular portions 82, 92 to guide the inner elastic piece 56 or the outer elastic piece 66, the inner elastic piece 56 or the outer elastic piece 66 can be guided by the interference avoidance surfaces 83, 93 and move smoothly to the inner or outer peripheral side of the tubular portions 82, 92.

[0154] Furthermore, if the inner peripheral portion of the outer conductor tube portion 92 opposite the interference avoidance surface 93 is formed in a shape in which equal-diameter portions are continuous along the central axis X of the outer conductor tube portion 92, the interference avoidance surface 93 can be easily formed by subjecting the end of the outer conductor tube portion 92 to chamfering or the like.

[0155] Furthermore, if the outer peripheral portion of the inner conductor tube portion 82 opposite the interference avoidance surface 83 is formed in a shape that is inclined along the interference avoidance surface 83, the interference avoidance surface 83 can be easily formed, for example, by bending the end portion of the inner conductor tube portion 82.

[0156] Furthermore, if slits 83b, 183a, 193a dividing the interference avoidance surfaces 83, 183, 193 are formed on the tip periphery of the inner conductor tube portion 82, 182 or the outer conductor tube portion 192, it is possible to easily form the divided interference avoidance surfaces 83, 183, 193 over the entire tip periphery of the inner conductor tube portion 82, 182 or the outer conductor tube portion 192.

[0157] Furthermore, if the widths S1, S of the slits 83b, 183a, 193a are smaller than the width W1 of the inner elastic piece 56 or the width W2 of the outer elastic piece 66, the inner elastic piece 56 or the outer elastic piece 66 will not fit into the slits 83b, 183a, 193a, but will be smoothly guided to the inner side of the inner conductor tube portion 82, 182 or the outer side of the outer conductor tube portion 192.

[0158] In addition, since an inner interference avoidance surface 83 is formed on the inner peripheral portion of the tip periphery of the inner conductor tube portion 82, even if the inner conductor 80 is tilted significantly relative to the mating inner conductor 50, the inner peripheral portion of the tip periphery of the inner conductor tube portion 82 is unlikely to interfere with the mating inner conductor 50.

[0159] In addition, since an external interference avoidance surface 93 is formed on the outer peripheral portion of the tip periphery of the outer conductor tube portion 92, even if the outer conductor 90 is significantly inclined with respect to the mating outer conductor 60, the outer peripheral portion of the tip periphery of the outer conductor tube portion 92 is unlikely to interfere with the mating outer conductor 60.

[0160] Moreover, according to this connection structure 28, the mating inner conductor 50 has an inner elastic piece 56, and the mating outer conductor 60 has an outer elastic piece 66. Therefore, by elastically deforming the inner elastic piece 56 and the outer elastic piece 66, the coaxial connector 70 can be connected to the coaxial connector for board 40 even if the coaxial connector 70 is inclined relative to the coaxial connector for board 40. In this case, even if the coaxial connector 70 is inclined relative to the coaxial connector for board 40, the interference avoidance surfaces 83, 93 make it difficult for the coaxial connector 70 to interfere with the coaxial connector for board 40.

[0161] Furthermore, since the mating dielectric 42 has an annular recess 47, the outer conductor tube portion 92 is unlikely to interfere with the mating dielectric 42 even if the coaxial connector 70 is connected to the coaxial connector for board 40 in an inclined state.

[0162] Furthermore, since the thickness of the inner and outer periphery of the mating dielectric 42 is ensured, the mating outer conductor 60 and the mating inner conductor 50 are firmly held by the mating dielectric 42 .

[0163] The configurations described in the above embodiment and modifications can be combined as appropriate as long as they are not mutually inconsistent. [Explanation of symbols]

[0164] 10 equipment 12 cases 13 Case 1 14 Case 2 15 Bottom 16 Holding cylinder part 17 Retaining partition 17h holding hole 20 Electrical Components 21 Circuit Board 22 Image sensor 28 Connection structure 30 Coaxial connector for external connection 32 Inner conductor for external connection 34 External connection dielectric 36 Outer conductor for external connection 40 Coaxial connector for circuit board (mating coaxial connector) 41 Connector holder 42 Opposite dielectric 43 Insertion hole 44 Positioning groove 45 Retaining annular protrusion 46 Outer peripheral ring-shaped protrusion 47 Annular recess 50 Inner conductor of the other side (terminal of the other side) 52 Counterpart inner conductor tube 52a Locking piece 52b Projecting piece 53 Positioning piece 53e Protruding end 53p Stopper protrusion 56 Inner elastic piece (elastic piece) 56a Slope 56b Curved section 60 Outer conductor of the other side (terminal of the other side) 62 Counterpart outer conductor tube 62a Locking piece 66 Outer elastic piece (elastic piece) 66a Slope 66b Curved section 70 Coaxial Connector 72 Dielectric 80 Inner conductor 81 Tapered section 82, 182 Inner conductor tube (tube) 83, 183 Interference avoidance surface (interference avoidance surface) 83a Dent 83b, 183a Slit 86 Inner conductor extension tube 86a Locking piece 87 Elastic Piece 90 Outer conductor 91 Tapered section 92, 192 Outer conductor tube (tube) 93, 193 External interference avoidance surface (interference avoidance surface) 93a, 93b dent 96 Outer conductor extension tube 96a Locking piece 97 Elastic Piece 193a Slit S1, S2 Slit width W1, W3 Width of elastic piece X center axis

Claims

1. A coaxial connector to be connected to a mating coaxial connector, An inner conductor; an outer conductor surrounding an outer periphery of the inner conductor; Equipped with At least one of the inner conductor and the outer conductor has a cylindrical portion to which a mating terminal of the mating coaxial connector is connected, the cylindrical portion is connected to the mating terminal with the mating terminal disposed on an inner periphery side or an outer periphery side of the cylindrical portion; A coaxial connector, wherein a portion of the tip edge of the tubular portion that faces the mating terminal has an interference avoidance surface that slopes away from the mating terminal as it approaches the tip side of the tubular portion.

2. 2. The coaxial connector of claim 1, A coaxial connector, wherein the interference avoidance surface extends annularly along a peripheral edge of a tip end of the cylindrical portion.

3. 3. The coaxial connector according to claim 1, The interference avoidance surface guides an elastic piece of the mating terminal at a peripheral tip edge of the cylindrical portion.

4. 3. The coaxial connector according to claim 1, a coaxial connector, wherein the interference avoidance surface is formed on one of the inner and outer circumferential sides of the cylindrical portion, and the other of the inner and outer circumferential sides of the cylindrical portion is formed in a shape having a continuous constant diameter portion along a central axis of the cylindrical portion.

5. 3. The coaxial connector according to claim 1, A coaxial connector, wherein the interference avoidance surface is formed on one of the inner and outer circumferential sides of the tubular portion, and the other of the inner and outer circumferential sides of the tubular portion is formed in a shape that is inclined in the same direction as the inclination of the interference avoidance surface.

6. 6. The coaxial connector according to claim 5, A coaxial connector, wherein a slit dividing the interference avoidance surface is formed on the peripheral edge of the tip of the cylindrical portion.

7. 7. The coaxial connector of claim 6, A coaxial connector, wherein the width of the slit is smaller than the width of the elastic piece of the mating terminal.

8. 3. The coaxial connector according to claim 1, the inner conductor includes an inner conductor tube portion as the tube portion, The mating terminal is inserted into the inner conductor tube portion, A coaxial connector, wherein an inner interference avoidance surface is formed as the interference avoidance surface on an inner peripheral portion of a tip edge of the inner conductor tube portion.

9. 3. The coaxial connector according to claim 1, the outer conductor includes an outer conductor tubular portion as the tubular portion, the outer conductor tube portion is inserted into the mating terminal, a coaxial connector, wherein an outer interference avoidance surface serving as the interference avoidance surface is formed on an outer peripheral portion of a tip periphery of the outer conductor tube portion;

10. A coaxial connector according to claim 1 or 2, The mating coaxial connector, the mating coaxial connector has a mating inner conductor and a mating outer conductor surrounding an outer periphery of the mating inner conductor, the mating inner conductor has an inner elastic piece that elastically contacts the inner conductor, A connection structure of a coaxial connector, wherein the mating outer conductor has an outer elastic piece that elastically contacts the outer conductor.

11. The coaxial connector connection structure according to claim 10, the mating coaxial connector has a mating dielectric located between a base end of the mating inner conductor and a base end of the mating outer conductor, A connection structure for a coaxial connector, wherein the mating dielectric has an annular recess facing the coaxial connector.

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