Coaxial connector connection structure

Abstract

To provide a coaxial connector connection structure that can easily improve communication performance.SOLUTION: In a connection structure 28 in which a first coaxial connector 40 and a second coaxial connector 70 are connected, the first coaxial connector includes a first inner conductor 50 and a first outer conductor 60 surrounding the outer circumferential side of the first inner conductor, and the second coaxial connector includes a second inner conductor 80 and a second outer conductor 90 surrounding the outer circumferential side of the second inner conductor. The first inner conductor has an inner elastic piece 56 elastically deformable in inward and outward directions, and the second inner conductor has an inner connecting tube portion 82. The first inner conductor is inserted and connected to the second inner conductor with the inner elastic piece in elastic contact with the inner circumferential surface of the inner connecting tube portion.SELECTED DRAWING: Figure 5

Description

[Technical field]

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

[0002] Patent Document 1 discloses a connection structure between a coaxial connector and a mating coaxial connector. The coaxial connector includes a center contact having a connection portion. The connection portion includes a pair of opposing elastic clamping pieces. The connection portion and the mating center contact are connected by clamping the pin-shaped mating center contact between the two elastic clamping pieces. Each elastic clamping piece is formed in a vertically long strip shape, and has an inwardly curved contact formed at the upper end. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2016-62661 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the technology disclosed in Patent Document 1, the elastic clamping piece is located outside the mating center contact. Therefore, the outer shape of the connection between the center contact and the mating center contact depends on the shape of the elastic clamping piece, and the outer shape is easily changed in the connection direction. As a result, in the connection structure of the coaxial connector, the distance between the inner conductor and the outer conductor changes in a complex manner, which may make it difficult to design to obtain the desired communication performance.

[0005] Therefore, an object of the present disclosure is to provide a coaxial connector connection structure that can easily improve communication performance. [Means for solving the problem]

[0006] 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, wherein the first coaxial connector includes a first inner conductor and a first outer conductor surrounding the outer circumferential side of the first inner conductor, and the second coaxial connector includes a second inner conductor and a second outer conductor surrounding the outer circumferential side of the second inner conductor, the first inner conductor has an inner elastic piece that can elastically deform in the inward and outward directions, and the second inner conductor has an inner connecting tube portion, and the first inner conductor is inserted and connected to the second inner conductor with the inner elastic piece elastically in contact with the inner surface of the inner connecting tube portion. Effect of the Invention

[0007] According to the present disclosure, it is possible to provide a coaxial connector connection structure that facilitates improving communication performance. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a device equipped with 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 the second coaxial connector. [Figure 7] FIG. 7 is a partial cross-sectional view showing a connection structure of a coaxial connector according to a modified example. [Figure 8] FIG. 8 is a partial cross-sectional view showing a connection structure of a coaxial connector according to another 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 connection structure of the coaxial connector of the present disclosure is as follows.

[0011] (1) A connection structure of a coaxial connector in which a first coaxial connector and a second coaxial connector are connected, the first coaxial connector includes a first inner conductor and a first outer conductor surrounding an outer circumferential side of the first inner conductor, the second coaxial connector includes a second inner conductor and a second outer conductor surrounding an outer circumferential side of the second inner conductor, the first inner conductor has an inner elastic piece that is elastically deformable in the inward and outward directions, the second inner conductor has an inner connecting tube portion, and the first inner conductor is inserted and connected to the second inner conductor with the inner elastic piece in elastic contact with an inner circumferential surface of the inner connecting tube portion.

[0012] Since the first inner conductor is inserted and connected to the second inner conductor with the inner elastic piece in elastic contact with the inner circumferential surface of the inner connecting tube portion, the outer shape of the connection between the first inner conductor and the second inner conductor is less likely to change in the connection direction between the first coaxial connector and the second coaxial connector. This makes it easier to design the shape to obtain the desired communication performance, and provides a connection structure for a coaxial connector that easily improves communication performance.

[0013] (2) In the connection structure of the coaxial connector of (1), the first inner conductor may have a plurality of inner elastic pieces, the plurality of inner elastic pieces being arranged at intervals along the circumferential direction of the inner connecting tube portion, and a gap may be formed between adjacent inner elastic pieces among the plurality of inner elastic pieces to prevent contact between adjacent inner elastic pieces when the plurality of inner elastic pieces are in elastic contact with the inner surface of the inner connecting tube portion.

[0014] In this case, even if the multiple elastic pieces elastically deform inward when the first inner conductor is inserted into the second inner conductor, the multiple elastic pieces are unlikely to come into contact with each other, so that the first inner conductor can be smoothly inserted and connected to the second inner conductor.

[0015] (3) A connection structure of a coaxial connector according to (1) or (2), wherein the inner connecting tube portion has a recess extending from the tip side of the inner connecting tube portion toward the base end side, and the circumferential width of the recess may be smaller than the circumferential width of the inner elastic piece.

[0016] This allows the inner elastic piece to be smoothly inserted into the inner connecting tube portion without fitting into the recess.

[0017] (4) In a connection structure of a coaxial connector according to any one of (1) to (3), the contact pressure of the inner elastic piece against the inner connecting tube portion may be set to a magnitude that maintains the initial shape of the inner connecting tube portion when the inner elastic piece is in elastic contact with the inner connecting tube portion.

[0018] This makes it possible to suppress deformation of the inner connecting tube portion and to satisfactorily connect the first inner conductor and the second inner conductor.

[0019] (5) In the coaxial connector connection structure according to any one of (1) to (4), the first inner conductor may be a pressed product of a metal plate.

[0020] When the first inner conductor is a pressed product of a metal plate, it is expected that the outer shape of the inner elastic piece will be easily formed into an uneven shape. Even in this case, by arranging the inner connecting tube portion on the outside of the inner elastic piece, the outer shape of the connection body between the first inner conductor and the second inner conductor is less likely to change in the connection direction between the first coaxial connector and the second coaxial connector. As a result, even if the first inner conductor is a pressed product of a metal plate, it is easy to design the shape to obtain the desired communication performance, and a connection structure for a coaxial connector that easily improves communication performance can be provided.

[0021] (6) A connection structure of a coaxial connector according to (5), wherein the second inner conductor has an opposite side connection tubular portion, the outer diameter of the opposite side connection tubular portion is smaller than the outer diameter of the inner connection tubular portion, and a tapered portion is provided between the inner connection tubular portion and the opposite side connection tubular portion, the outer diameter of which gradually decreases from the inner connection tubular portion toward the opposite side connection tubular portion, and a slit is formed along the circumferential direction of the inner connection tubular portion at the boundary between the inner connection tubular portion and the tapered portion.

[0022] In this case, a slit is formed along the circumferential direction of the inner connecting cylindrical portion at the boundary between the inner connecting cylindrical portion and the tapered portion, so that a tapered portion that gradually narrows relative to the inner connecting cylindrical portion can be easily formed.

[0023] (7) A connection structure of a coaxial connector of any one of (1) to (6), wherein the inner elastic piece includes an inner inclined portion that inclines outward from the base end to the tip end of the inner elastic piece, and at least a portion of the inner inclined portion may be inclined toward the central axis of the inner connecting tube portion as it moves away from the tip end of the inner connecting tube portion, outside the tip opening of the inner connecting tube portion, in the connection direction between the first coaxial connector and the second coaxial connector.

[0024] This prevents the outer shape of the connection between the first inner conductor and the second inner conductor from suddenly changing outside the tip of the inner connection tube portion, making it easier to design the shape to obtain the desired communication performance, and providing a connection structure for a coaxial connector that easily improves communication performance.

[0025] (8) A connection structure of a coaxial connector according to any one of (1) to (7), wherein one of the first outer conductor and the second outer conductor has an outer elastic piece that is elastically deformable in an inward and outward direction, and the other of the first outer conductor and the second outer conductor has an outer connecting tubular portion, and the other of the first outer conductor and the second outer conductor may be inserted and connected to the one of the first outer conductor and the second outer conductor with the outer elastic piece in elastic contact with an outer peripheral surface of the outer connecting tubular portion.

[0026] The other of the first and second outer conductors having the outer connection tube portion is inserted and connected to the other of the first and second outer conductors having the outer elastic piece, so that the outer connection tube portion is disposed on the inside. Therefore, the inner shape of the connection body between the first and second outer conductors is unlikely to change in the connection direction between the first and second coaxial connectors. This makes it difficult for the distance between the inner and outer conductors to change in the connection direction, making it easier to design the shape to obtain the desired communication performance. Thus, a coaxial connector connection structure that easily improves communication performance can be provided.

[0027] (9) In the connection structure of the coaxial connector of (8), the first outer conductor may have the outer elastic piece, the second outer conductor may have the outer connecting tube portion, and the second outer conductor may be inserted and connected to the first outer conductor with the outer elastic piece in elastic contact with an outer peripheral surface of the outer connecting tube portion.

[0028] Since the first coaxial connector has both the inner connecting cylinder portion and the outer connecting cylinder portion, the inner connecting cylinder portion and the outer connecting cylinder portion are easily maintained coaxially, making it easier to obtain good communication performance.

[0029] (10) A connection structure of a coaxial connector according to any one of (1) to (7), wherein the first outer conductor has an internal contact outer elastic piece that is elastically deformable in an inward and outward direction, and the second outer conductor has an outer connection tubular portion, and the first outer conductor is inserted and connected to the second outer conductor with the internal contact outer elastic piece in elastic contact with an inner surface of the outer connection tubular portion, and in the connection direction between the first coaxial connector and the second coaxial connector, the contact position of the internal contact outer elastic piece with respect to the inner surface of the outer connection tubular portion may be located closer to the tip of the outer connection tubular portion than the contact position of the inner elastic piece with respect to the inner surface of the inner connection tubular portion.

[0030] In this case, since the first inner conductor is inserted and connected to the second inner conductor, it is assumed that the outer shape of the connection between the first inner conductor and the second inner conductor becomes thinner at the tip side of the inner connection tube part. Therefore, the first outer conductor is inserted and connected to the second outer conductor while the inner contact outer elastic piece is elastically in contact with the inner peripheral surface of the outer connection tube part. The inner shape of the connection between the first outer conductor and the second outer conductor can become thinner according to the change in shape of the connection between the first inner conductor and the second inner conductor. In addition, in the connection direction, the contact position of the inner contact outer elastic piece with the inner peripheral surface of the inner connection tube part is located closer to the tip side of the outer connection tube part than the contact position of the inner elastic piece with the inner peripheral surface of the inner connection tube part. This makes it possible to make it difficult for the distance between the inner and outer conductors to change in the connection direction on the outer peripheral side of the contact position of the inner elastic piece. This suppresses the change in the distance between the inner and outer conductors, making it easier to design the shape to obtain the desired communication performance.

[0031] (11) A connection structure of a coaxial connector according to (10), wherein the inner elastic piece includes an inner inclined portion that inclines outward from the base end to the tip end of the inner elastic piece, and at least a portion of the inner inclined portion is inclined toward the central axis of the inner connecting tube portion in the connection direction, outside the tip opening of the inner connecting tube portion, as it moves away from the tip of the inner connecting tube portion; and the inner contact outer elastic piece includes an inner contact outer inclined portion that inclines outward from the base end to the tip end of the inner contact outer elastic piece, and at least a portion of the inner contact outer inclined portion is inclined toward the central axis of the outer connecting tube portion in the connection direction, outside the tip opening of the outer connecting tube portion, as it moves away from the tip of the outer connecting tube portion.

[0032] In the portions protruding from the inner connecting tube portion and the outer connecting tube portion, the inner inclined portion of the inner elastic piece and the inner contact outer inclined portion of the inner contact outer elastic piece are inclined toward the central axis, which makes it easier to keep the distance between the inner elastic piece and the inner contact outer elastic piece constant, and facilitates designing the shape to obtain the desired communication performance.

[0033] [Details of the embodiment of the present disclosure] Specific examples of 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.

[0034] [Embodiment] Hereinafter, a coaxial connector connection structure according to an embodiment will be described. 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.

[0035] <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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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 and connected to a second 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 the second outer conductor 90 is connected.

[0041] 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.

[0042] A coaxial connector connection structure is incorporated in the device 10. The coaxial connector connection structure is a connection structure between a first coaxial connector 40 and a second coaxial connector .

[0043] In this embodiment, the first coaxial connector 40 is provided on the surface of the circuit board 21 opposite to the imaging element 22. The first coaxial connector 40 is an example of a board-side coaxial connector fixed to the circuit board 21.

[0044] The first coaxial connector 40 includes a first inner conductor 50, a first outer conductor 60 surrounding the outer periphery of the first inner conductor 50, and a first dielectric 42 located between the first inner conductor 50 and the first outer conductor 60.

[0045] The first dielectric 42 surrounds the first inner conductor 50. The first dielectric 42 is formed 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. As a result, 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. The first dielectric 42 may be omitted.

[0046] 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 made of an insulator. The second outer conductor 90 surrounds the periphery of the second dielectric 72.

[0047] 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 is connected to the first coaxial connector 40. The second coaxial connector 70 further protrudes from the first coaxial connector 40 toward the coaxial connector 30 for external connection. The second coaxial connector 70 relays and connects the first coaxial connector 40 and the coaxial connector 30 for external connection. The second coaxial connector 70 is connected to the first coaxial connector 40 and the coaxial connector 30 for external connection in a manner that allows its posture to be changed.

[0048] The coaxial connector for external connection 30 may be understood as a third coaxial connector, and the second coaxial connector 70 as a relay coaxial connector that relays and connects the first coaxial connector 40 and the third coaxial connector.

[0049] 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, the second 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.

[0050] The circuit board 21 is supported at a fixed position within the case 12. In terms of design, the position of the first coaxial connector 40 relative to the coaxial connector for external connection 30 is set at a fixed position. However, there is a possibility that the position of the first coaxial connector 40 relative to the coaxial connector for external connection 30 may deviate from the designed position within a tolerance range.

[0051] Even if the distance between the first coaxial connector 40 and the coaxial connector 30 for external connection varies during assembly of the device 10 or in the completed state, the variation in distance can be absorbed by adjusting the insertion amount of the second coaxial connector 70 into the first coaxial connector 40. Furthermore, even if the coaxial connector 30 for external connection is displaced from a position coaxially facing the first coaxial connector 40, the second coaxial connector 70 is tilted relative to the first coaxial connector 40 and the coaxial connector 30 for external connection, thereby absorbing the displacement.

[0052] <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 second coaxial connector 70. In Fig. 6, the elastic pieces 56, 66 are partially shown.

[0053] First, the first coaxial connector 40 and the second coaxial connector 70 will be described in more detail, and then the connection structure 28 will be described in more detail, focusing on the relationship between the two coaxial connectors 40, 70.

[0054] <About the first coaxial connector> As described above, the first coaxial connector 40 includes the first inner conductor 50, the first outer conductor 60, and the first dielectric material .

[0055] The first inner conductor 50 is an elongated conductive member. In this embodiment, the first inner conductor 50 may be a pressed metal plate. A pressed metal plate is an object formed by punching and bending a metal plate by press working, and has a shape in which a metal plate of substantially uniform thickness is bent into a predetermined shape. The first inner conductor may be formed by cutting a metal material.

[0056] More specifically, the first inner conductor 50 includes a base end side inner cylindrical portion 52 and an inner elastic piece 56 .

[0057] The base end side inner cylinder 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. In the first coaxial connector 40, the tip is the end to which the second 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.

[0058] A positioning piece 53 is formed so as to protrude from a circumferential portion at the base end of the base-end inner cylinder portion 52 toward the outer periphery. The positioning piece 53 is a plate-like portion along the central axis of the base-end inner cylinder portion 52, and in this embodiment, is a rectangular plate-like portion. The positioning piece 53 is configured by two overlapping plate-like portions. In this embodiment, the base-end inner cylinder portion 52 is formed by pressing the plate-like portions into a cylinder. Plate-like portions protrude toward the outer periphery from each of two adjacent edges at the joint of the cylinder, and the positioning piece 53 is formed by the two plate-like portions overlapping each other.

[0059] 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 into a shape that hooks onto the bottom of the positioning groove 44 so that the base end side inner cylinder portion 52 is unlikely to come off toward the tip end side of the first dielectric 42.

[0060] The base end side inner cylinder portion 52 may be formed with a locking piece 52a that is hooked onto the inner peripheral surface of the first dielectric 42 when the base end side inner cylinder portion 52 is press-fitted 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 base end side inner cylinder portion 52.

[0061] An inner elastic piece 56 protrudes from the tip of the base end side inner cylinder portion 52. The inner elastic piece 56 is formed so as to be elastically deformable in the inward and outward directions of the first inner conductor 50.

[0062] In this embodiment, a plurality of (here, three) inner elastic pieces 56 are arranged at intervals in the circumferential direction from the tip of the base-end side inner cylinder portion 52. Preferably, the multiple inner elastic pieces 56 are positioned at equal intervals around the central axis X of the base-end side inner cylinder portion 52.

[0063] The inner elastic piece 56 includes an inner inclined portion 56a that inclines outward from the tip of the base-end inner cylinder portion 52, and a curved portion 56b that is connected to the tip of the inner inclined portion 56a and has an outwardly convex curved shape.

[0064] When the multiple inner elastic pieces 56 are inserted into the second inner conductor 80, the inner inclined portions 56a are elastically deformed inward, and the outward apexes of the curved portions 56b are elastically pressed against the inner circumferential surface of the second inner conductor 80. This keeps the first inner conductor 50 electrically connected to the second inner conductor 80.

[0065] The outward apex of the curved portion 56b comes into contact with the inner peripheral surface of the second inner conductor 80, allowing the inner elastic piece 56 to stably come into contact with the second inner conductor 80 in a limited small area. When the inner elastic piece 56 is formed by pressing a metal plate, the surface of the curved portion 56b opposite to the outward apex becomes a concave surface.

[0066] In addition, in a state where the multiple inner elastic pieces 56 are inserted into the second inner conductor 80, the multiple inner elastic pieces 56 are displaced toward the central axis X of the second inner conductor 80. As a result, the intervals between the multiple inner elastic pieces 56 become smaller in the circumferential direction of the base-end inner tubular portion 52. Between the multiple inner elastic pieces 56 adjacent to each other in the circumferential direction, a gap Ws is formed (see FIG. 4) that prevents the adjacent inner elastic pieces 56 from contacting each other in a state where the multiple inner elastic pieces 56 are in elastic contact with the inner circumferential surface of the inner connecting tubular portion 82 of the second inner conductor 80. The gap Ws is set to a size that can prevent the inner elastic pieces 56 from interfering with each other depending on the width and bending shape of the multiple inner elastic pieces 56, the inner diameter of the inner connecting tubular portion 82, and the like.

[0067] The contact pressure of the inner elastic piece 56 against the inner connecting tube portion 82 is preferably set to a magnitude that maintains the initial shape of the inner connecting tube portion 82 in a state in which the inner elastic piece 82 is in elastic contact with the inner connecting tube portion 82. The initial shape of the inner connecting tube portion 82 is the shape before the multiple inner conductor elastic pieces 56 are inserted into the inner connecting tube portion 82. In other words, the contact pressure of the inner elastic piece 56 is preferably set to a magnitude that suppresses the deformation of the inner connecting tube portion 82. The contact pressure of the inner elastic piece 56 against the inner connecting tube portion 82 is the force with which the inner elastic piece 56 presses the inner connecting tube portion 82 toward the outer periphery. In other words, since the multiple inner elastic pieces 56 are in elastic contact with the inner circumferential surface of the inner connecting tube portion 82, a force that spreads the inner connecting tube portion 82 toward the outer periphery is applied to the inner connecting tube portion 82. The multiple inner elastic pieces 56 are preferably in elastic contact with the inner circumferential surface of the inner connecting tube portion 82 with a force that does not spread the inner connecting tube portion 82 toward the outer periphery. The force with which the inner elastic piece 56 presses the inner connecting tube portion 82 can be adjusted by changing the width, thickness, material of the inner elastic piece 56, the thickness, material of the plating layer, etc.

[0068] The number of inner elastic pieces may be two, or four or more.

[0069] The first dielectric 42 is formed in 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 base end side inner cylinder portion 52. The first dielectric 42 is, for example, a molded resin part.

[0070] An insertion hole 43 into which the base end of the first inner conductor 50, more specifically, the base end of the base end side inner cylinder portion 52, is inserted is formed in the center of the first dielectric 42. Also, a positioning groove 44 into which a 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.

[0071] Then, by inserting the base end side inner cylinder portion 52 into the insertion hole 43, the first inner conductor 50 is inserted and held in the first dielectric 42. Preferably, the base end side inner cylinder portion 52 is press-fitted into the insertion hole 43 and held therein.

[0072] If the first inner conductor is a machined product, the press-fit structure makes it easy to hold the first inner conductor firmly against the first dielectric. If the first inner conductor 50 is a pressed product of a metal plate, the positioning piece 53 is fitted into the positioning groove 44 to increase the holding strength. The positioning piece 53 is sandwiched between the inner circumferential surface of the positioning groove 44, making it easy for the first dielectric 42 to hold the first inner conductor 50 firmly. If the first inner conductor 50 is a pressed product of a metal plate, the first inner conductor 50 can be manufactured at low cost.

[0073] Furthermore, the retaining 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 first inner conductor 50 to come out of the first dielectric 42, and the first inner conductor 50 is held more firmly.

[0074] In addition, a retaining annular protrusion 45 that protrudes in an annular shape toward the tip side of the first inner conductor 50 is formed in a portion of the first dielectric 42 surrounding the insertion hole 43. The retaining annular protrusion 45 retains the base-end side inner 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 with respect to the first dielectric 42.

[0075] The outer peripheral surface of the first dielectric 42 is formed in a short cylindrical shape that can be inserted into the inner peripheral portion of the first outer conductor 60. An outer peripheral portion of the first dielectric 42 on the first 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 first inner conductor 50. 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. This makes it easy for the first dielectric 42 to be firmly held relative to the first outer conductor 60, and makes it difficult for the first outer conductor 60 to tilt relative to the first dielectric 42. This makes it easy for the first inner conductor 50 and the first outer conductor 60 to be kept in a coaxial positional relationship.

[0076] 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.

[0077] In this embodiment, the first outer conductor 60 includes a base-end side outer tubular portion 62 and an outer elastic piece 66 protruding from the tip of the base-end side outer tubular portion 62 .

[0078] The base-side outer tubular portion 62 is formed in a tubular shape, more specifically, in a cylindrical shape, in which the first dielectric 42 can be placed. The first dielectric 42 is accommodated and held in the base end portion of the base-side outer tubular portion 62.

[0079] The base end side outer cylinder portion 62 may be formed with a locking piece 62a that is hooked onto the outer circumferential surface of the first dielectric 42 when the first dielectric 42 is press-fitted.

[0080] An outer elastic piece 66 protrudes from the tip of the base-end side outer cylinder portion 62. In this embodiment, a plurality of (here, eight) outer elastic pieces 66 extend at intervals in the circumferential direction from the tip of the base-end side outer cylinder portion 62. Preferably, the multiple outer elastic pieces 66 are positioned at equal intervals around the central axis X of the base-end side outer cylinder portion 62.

[0081] The outer elastic piece 66 includes an outer inclined portion 66a that inclines inward from the tip of the base end side outer cylinder portion 62, and a curved portion 66b that is connected to the tip of the outer inclined portion 66a and has an inwardly convex curved shape.

[0082] When the multiple outer elastic pieces 66 are fitted onto the second outer conductor 90, the outer inclined portions 66a are elastically deformed outward, while the inward apexes of the curved portions 66b are elastically pressed against the outer circumferential surface of the second outer conductor 90. This keeps the first outer conductor 60 electrically connected to the second outer conductor 90.

[0083] The inward apex of the curved portion 66b comes into contact with the outer peripheral surface of the second outer conductor 90, allowing the outer elastic piece 66 to stably come into contact with the second outer conductor 90 in a limited small area. When the outer elastic piece 66 is formed by pressing a metal plate, the surface of the curved portion 66b opposite to the inward apex becomes a concave surface.

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

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

[0086] 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 and prevent it from coming into contact with other members.

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

[0088] The second inner conductor 80 is an elongated conductive member. In this embodiment, the second inner conductor 80 is formed by pressing a metal plate. More specifically, the second inner conductor 80 includes an inner connecting tube portion 82. In this embodiment, the second inner conductor 80 further includes an opposite-side connecting tube portion 86. The second inner conductor may be a machined product.

[0089] The inner connection tube portion 82 is formed in a tube shape, more specifically, in a cylindrical shape. An open end of the inner connection tube portion 82 faces the first coaxial connector 40. The inner connection tube portion 82 is a portion into which the multiple inner elastic pieces 56 of the first inner conductor 50 are inserted and connected.

[0090] More specifically, the inner connecting cylinder portion 82 is a cylinder that is elongated along the central axis X. The inner diameter of the inner connecting cylinder 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 connecting cylinder portion 82 while elastically deforming inward.

[0091] The opposite side connecting cylinder portion 86 is located on the opposite side of the inner connecting cylinder portion 82 from the first coaxial connector 40. In this embodiment, the outer diameter of the opposite side connecting cylinder portion 86 is smaller than the outer diameter of the inner connecting cylinder portion 82.

[0092] The opposite side connecting cylinder portion 86 is connected to the inner connecting cylinder portion 82 via a tapered portion 81. The tapered portion 81 is a tapered portion whose outer diameter gradually decreases from the inner connecting cylinder portion 82 toward the opposite side connecting cylinder portion 86. The opposite side connecting cylinder portion may be connected to the inner connecting cylinder portion via a step portion.

[0093] A slit 81S1 is formed along the circumferential direction of the inner connecting cylinder portion 82 at the boundary between the inner connecting cylinder portion 82 and the tapered portion 81 (see FIG. 4). For example, the slit 81S1 is formed to extend over an area of ​​about 1 / 3 to 2 / 3, preferably about half, of the entire circumference of the inner connecting cylinder portion 82. By providing the slit 81S1 at the boundary between the inner connecting cylinder portion 82 and the tapered portion 81, the tapered portion 81, whose diameter gradually narrows relative to the inner connecting cylinder portion 82, which has the same diameter as the cylindrical inner connecting cylinder portion 82, can be easily processed in a continuous state.

[0094] When the metal plate is rolled by press working to form the inner connecting cylinder portion 82, a seam is formed along the central axis X in a part of the circumferential direction of the inner connecting cylinder portion 82. The slit 81S1 may extend so as to widen on both sides of the seam. In this case, the metal plate can be easily bent near the seam, which makes it easy to press working the second inner conductor 80.

[0095] A gap 81S2 may be additionally provided at the joint in the tapered portion 81. The gap 81S2 is formed as a triangular gap that opens from the slit 81S1 to the tapered portion 81 side. The gap 81S2 facilitates rounding of the tapered portion 81 while suppressing interference at the joint, and facilitates press working of the second inner conductor 80.

[0096] The slit 81S1 and the gap 81S2 may be omitted.

[0097] The opposite-side connection 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 external connection inner conductor 32 is inserted between the two elastic pieces 87 from the tip side of the two elastic pieces 87. When the external connection inner conductor 32 is sandwiched between the two elastic pieces 87, the second inner conductor 80 is connected to the external connection inner conductor 32.

[0098] The opposite connecting tube portion 86 may be formed with a partial locking piece 86 a that can be locked to the second dielectric 72 .

[0099] The second dielectric 72 is made of resin etc. The second dielectric 72 is, for example, a molded resin part.

[0100] The second dielectric 72 is formed in a tubular shape capable of accommodating at least a portion of the second inner conductor 80. In this embodiment, the second dielectric 72 is formed in a cylindrical shape. The opposite side connecting tubular portion 86 is accommodated within the second dielectric 72. The internal space of the opposite side connecting tubular portion 86 is formed to be large enough to hold the base end of the opposite side connecting tubular portion 86 in a press-fitted state and to allow elastic deformation of the elastic piece 87 in the inward and outward directions.

[0101] One end of the second dielectric 72 contacts the tapered portion 81, thereby enabling the second dielectric 72 to be positioned relative to the second inner conductor 80. The inner connecting tube portion 82 extends further toward the first coaxial connector 40 than the second dielectric 72.

[0102] The second dielectric 72 may surround the inner connecting cylindrical portion 82. A dielectric different from the second dielectric 72 may surround the inner connecting cylindrical portion 82.

[0103] The second outer conductor 90 is disposed on the outer periphery of the second dielectric 72. The second outer conductor 90 is formed of a conductive material such as a metal, and surrounds the second dielectric 72. The second outer conductor 90 is formed, for example, by pressing a metal plate.

[0104] The second outer conductor 90 includes an outer connection tube portion 92 and an opposite outer connection tube portion 96 .

[0105] The outer connection tube portion 92 is formed in a tube shape, more specifically, in a cylindrical shape. An open end of the outer connection tube portion 92 faces the first coaxial connector 40. The outer connection tube portion 92 is a portion that is connected to the first outer conductor 60.

[0106] The outer connecting cylinder portion 92 is located on the outer circumferential side of the inner connecting cylinder portion 82 with a gap therebetween. The outer diameter of the outer connecting cylinder 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 connecting cylinder portion 92 while elastically deforming outward.

[0107] The opposite side external connection tube portion 96 is located on the opposite side to the first coaxial connector 40 with respect to the outer connection tube portion 92. In this embodiment, the opposite side external connection tube portion 96 is thinner than the outer connection tube portion 92. The opposite side external connection tube portion 96 is connected to the outer connection tube portion 92 via a tapered portion 91. The tapered portion 91 is a tapered portion that gradually becomes thinner from the outer connection tube portion 92 toward the opposite side external connection tube portion 96. The opposite side connection tube portion may be connected to the outer connection tube portion via a step portion.

[0108] The opposite external connection tube portion 96 may have an elastic piece 97 protruding 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, whereby the second outer conductor 90 is connected to the external connection outer conductor 36.

[0109] The opposite outer connection tube portion 96 may be formed with a partial locking piece 96 a that can be locked to the second dielectric 72 .

[0110] The inner connecting cylinder portion 82 and the outer connecting cylinder portion 92 may be formed with recesses 83a, 83b, 83c, 93a, 93b, and 93c recessed toward the base end when viewed from the tip end (see FIG. 6).

[0111] The recesses 83a, 83b, 83c, 93a, 93b, and 93c may be recesses for facilitating processes such as bending and carrier cutting during press processing. For example, the recess 83b may be a slit-shaped recess for facilitating processing the tip of the inner connecting cylinder portion 82 into an outward tapered shape. The recesses 83c and 93c may be thin recesses formed by the joints between the inner connecting cylinder portion 82 and the outer connecting cylinder portion 92.

[0112] It is preferable that the width of the recesses 83a, 83b, and 83c (for example, the width S1 of the recess 83b) is smaller than the width W1 of the inner elastic piece 56. This allows the inner elastic piece 56 to move smoothly toward the inner circumferential surface of the inner connecting cylinder portion 82 without fitting into the recesses 83a, 83b, and 83c.

[0113] Similarly, the widths of the recesses 93a, 93b, and 93c are preferably smaller than the width of the outer elastic piece 66. This allows the outer elastic piece 66 to move smoothly toward the outer circumferential surface of the outer connecting cylinder portion 92 without getting stuck in the recesses 93a, 93b, and 93c.

[0114] <Connection structure> The positional relationship between the inner and outer conductors will be described assuming that the first coaxial connector 40 and the second coaxial connector 70 are connected to each other.

[0115] With the first coaxial connector 40 and the second coaxial connector 70 connected, the first inner conductor 50 is inserted and connected to the second inner conductor 80 with the multiple inner elastic pieces 56 in elastic contact with the inner surface of the inner connecting tube portion 82.

[0116] In addition, in the above-mentioned connected state, with the plurality of outer elastic pieces 66 in elastic contact with the outer peripheral surface of the outer connection tubular portion 92 , the second inner conductor 80 is inserted and connected to the first inner conductor 50 .

[0117] Focusing on the connection between the first inner conductor 50 and the second inner conductor 80, the first inner conductor 50 having the inner elastic piece 56 is located inside the inner connecting tubular portion 82. For this reason, the outer shape of the connection between the first inner conductor 50 and the second inner conductor 80 reflects the outer shape of the inner connecting tubular portion 82 in which constant-diameter portions are continuous. In other words, regardless of the curved shape of the inner elastic piece 56, the outer shape of the connection between the first inner conductor 50 and the second inner conductor 80 has a shape in which constant-diameter portions are continuous.

[0118] Moreover, focusing on the connection between the first outer conductor 60 and the second outer conductor 90, the first outer conductor 60 having the outer elastic piece 66 is located on the outer circumferential side of the outer connecting tubular portion 92. For this reason, the inner shape of the connection between the first outer conductor 60 and the second outer conductor 90 reflects the outer shape of the outer connecting tubular portion 92 in which constant diameter portions are continuous. In other words, regardless of the curved shape of the outer elastic piece 66, the inner shape of the connection between the first outer conductor 60 and the second outer conductor 90 has a shape in which constant diameter portions are continuous.

[0119] Therefore, assuming a coaxial structure in which the connection between the first inner conductor 50 and the second inner conductor 80 is the inner conductor and the connection between the first outer conductor 60 and the second outer conductor 90 is the outer conductor, the coaxial structure has a wide range in which a constant inner diameter and a constant outer diameter continue in the axial direction. This makes it easy to design the impedance of the connection structure 28 of the coaxial connector. For example, it becomes easy to design the connection structure 28 such that the characteristic impedance is set to 50Ω, assuming a constant distance between the inner and outer conductors.

[0120] <Effects, etc.> According to the coaxial connector connection structure 28 configured as above, the first inner conductor 50 is inserted and connected to the second inner conductor 80 with the inner elastic piece 56 in elastic contact with the inner circumferential surface of the inner elastic piece 56, so that the outer shape of the inner conductor, which is the connection between the first inner conductor 50 and the second inner conductor 80, is less likely to change in the connection direction of the coaxial connectors 40, 70. As a result, it is easy to design the shape to obtain the desired communication performance, assuming that most parts of the inner conductor have a constant outer diameter, and it is possible to provide a coaxial connector connection structure 28 that makes it easy to improve communication performance.

[0121] Furthermore, even if the connection amount between the first coaxial connector 40 and the second coaxial connector 70 varies, a constant inter-conductor distance is maintained between the inner connection tube portion 82 and the outer connection tube portion 92. This makes it easy to maintain constant communication performance.

[0122] The shape design of the connection body including the first inner conductor 50 and the second inner conductor 80, and the connection body including the first outer conductor 60 and the second outer conductor 90 may be made on the assumption that air exists between them, or on the assumption that a tangible dielectric material such as a resin exists between them.

[0123] In addition, when a gap is formed between adjacent inner elastic pieces 56 among the multiple inner elastic pieces 56 to avoid mutual contact while the multiple inner elastic pieces 56 are in elastic contact with the inner surface of the inner connecting tube portion 82, the first inner conductor 50 can be smoothly inserted and connected to the second inner conductor 80.

[0124] Furthermore, when the inner connecting tube portion 82 has recesses 83a, 83b, 83c that are concave when viewed from its tip side, if the width (e.g., width S1) of the recesses 83a, 83b, 83c is smaller than the width W1 of the inner elastic piece 56, the inner elastic piece 56 will be smoothly inserted into the inner connecting tube portion 82 without fitting into the recesses 83a, 83b, 83c.

[0125] Furthermore, when the contact pressure of the inner elastic piece 56 against the inner connecting tube portion 82 is set to a value that maintains the initial shape of the inner connecting tube portion 82, the first inner conductor 50 and the second inner conductor 80 can be connected well without causing poor contact due to deformation of the inner connecting tube portion 82.

[0126] Furthermore, when the first inner conductor 50 is a pressed product, the uneven shape for contacting the inner connecting tube portion 82 is reflected on both sides of the inner elastic piece 56. For this reason, it is assumed that the outer shape of the inner elastic piece 56 is likely to be formed with an uneven shape. Even in this case, by arranging the inner connecting tube portion 82 on the outside of the inner elastic piece 56, the outer shape of the connection body between the first inner conductor 50 and the second inner conductor 80 is unlikely to change in the connection direction. As a result, even if the first inner conductor 50 is a pressed product of a metal plate, it is easy to design the shape to obtain the desired communication performance, and a coaxial connector connection structure 28 that easily improves communication performance can be provided.

[0127] In addition, since a slit 81S1 is formed along the circumferential direction of the inner connecting cylinder portion 82 at the boundary between the inner connecting cylinder portion 82 and the tapered portion 81, it is possible to easily form the tapered portion 81 which gradually narrows relative to the inner connecting cylinder portion 82.

[0128] Furthermore, impedance can be easily adjusted by adjusting the width, length, etc. of the slit 81S1.

[0129] Furthermore, the second outer conductor 90 is inserted and connected to the first outer conductor 60 with the outer elastic piece 66 in elastic contact with the outer peripheral surface of the outer connection tube portion 92. This makes it difficult for the inner shape of the connection body between the first outer conductor 60 and the second outer conductor 90 to change in the connection direction. This makes it even more difficult for the distance between the inner and outer conductors to change in the connection direction, making it easier to design the shape to obtain the desired communication performance. Thus, it is possible to provide a coaxial connector connection structure 28 that easily improves communication performance.

[0130] In particular, since the first outer conductor 60 has the outer elastic piece 66 and the second outer conductor 90 has the outer connecting tube portion 92, the second coaxial connector 70 has the inner connecting tube portion 82 and the outer connecting tube portion 92. Therefore, the inner connecting tube portion 82 and the outer connecting tube portion 92 are easily maintained coaxially, and good communication performance is easily obtained.

[0131] [Variations] At least a portion of the inner inclined portion 56a may be inclined toward the central axis X outside the tip opening of the inner connecting cylinder portion 82 in the connecting direction as it moves away from the tip of the inner connecting cylinder portion 82.

[0132] In the above embodiment as well, at least a portion of the inner inclined portion 56a is inclined outward from the tip opening of the inner connecting cylinder portion 82 (see FIG. 5).

[0133] In order to minimize the step between the inner connecting tube portion 82 and the inner elastic piece 56, it is preferable that a portion of the inner inclined portion 56a close to the tip is located at the opening of the inner connecting tube portion 82, as in the modified example shown in Fig. 7. For example, it is preferable that more than half of the region of the inner inclined portion 56a from the base end is located outside the tip opening of the inner connecting tube portion 82. For example, the above configuration can be realized by shortening the base end side inner tube portion 152 of the first inner conductor 150 corresponding to the first inner conductor 50.

[0134] In this case, it is possible to reduce the amount of recess (step) of the inner inclined portion 56a relative to the opening edge of the inner connecting cylinder portion 82 at the portion protruding from the opening of the inner connecting cylinder portion 82. Then, the outer shape of the connection between the first inner conductor 150 and the second inner conductor 80 can be gradually reduced from the opening edge of the inner connecting cylinder portion 82 toward the base-end inner cylinder portion 52 in accordance with the inclination of the inner inclined portion 56a. This makes it easier to design the shape to obtain the desired communication performance, and makes it possible to provide a connection structure for a coaxial connector that easily improves communication performance.

[0135] 8, the first outer conductor 160 corresponding to the first outer conductor 60 may have an internal-contact outer elastic piece 166 that is elastically deformable in the inward and outward directions. The first outer conductor 160 may be inserted into and connected to the second outer conductor 90 with the internal-contact outer elastic piece 166 in elastic contact with the inner circumferential surface of the outer connection tubular portion 92.

[0136] In addition, in the connection direction, a contact position P1 of the internal contact outer elastic piece 166 with the inner circumferential surface of the outer connecting cylinder portion 92 should be located closer to the tip of the outer connecting cylinder portion 92 than a contact position P2 of the inner elastic piece 56 with the inner circumferential surface of the inner connecting cylinder portion 82. Preferably, the contact position P1 should be located closer to the tip of the outer connecting cylinder portion 92 than the tip opening of the inner connecting cylinder portion 82.

[0137] As a result, in the connection direction, in the portion where the outer shape narrows as the inner connection tube portion 82 switches to the inner elastic piece 56, the inner shape narrows as the outer connection tube portion 92 switches to the inner contact outer elastic piece 166. This makes it possible to make it difficult for the distance between the inner and outer conductors to change in the connection direction. In addition, the outer connection tube portion 92 surrounds the outer periphery of the contact position P2 of the inner elastic piece 56. Therefore, even in the region on the tip side of the inner contact outer elastic piece 166, the change in the distance between the inner and outer conductors is suppressed. This makes it easier to design the shape to obtain the desired communication performance.

[0138] In this case, the internal contact outer elastic piece 166 may include an internal contact outer inclined portion 166a that inclines outward from the base end toward the tip end of the internal contact outer elastic piece 166. At least a portion of this internal contact outer inclined portion 166a may be outside the tip opening of the outer connecting cylinder portion 92 and inclined toward the central axis X in the connection direction as it moves away from the tip end of the outer connecting cylinder portion 92.

[0139] As a result, the inner inclined portion 56a of the inner elastic piece 56 and the inner-contact outer inclined portion 166a of the inner-contact outer elastic piece 166 are inclined to the same side toward the central axis X. This makes it easier to keep the distance between the inner elastic piece 56 and the inner-contact outer elastic piece 166 constant, making it easier to design the shape to obtain the desired communication performance.

[0140] In the present embodiment, an example has been described in which the first coaxial connector 40 includes the inner elastic piece 56 and the outer elastic piece 66, and the second coaxial connector 70 includes the inner connecting tube portion 82 and the outer connecting tube portion 92. However, the first coaxial connector may include the inner elastic piece and the outer connecting tube portion, and the second coaxial connector may include the inner connecting tube portion and the outer elastic piece.

[0141] The board-side coaxial connector may include an inner connecting tube portion and an outer connecting tube portion, and the relay coaxial connector may include an inner elastic piece and an outer elastic piece.

[0142] The configuration according to the above embodiment may be applied to the connection portion between the relay coaxial connector and the external connection coaxial connector, and may be applied to connection structures of other coaxial connectors, not limited to the above device.

[0143] 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]

[0144] 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 1st coaxial connector 41 Connector holder 42 First Dielectric 43 Insertion hole 44 Positioning groove 45 Retaining annular protrusion 46 Outer peripheral ring-shaped protrusion 50 First inner conductor 52 Base end side inner cylinder 52a Locking piece 52b Projecting piece 53 Positioning piece 53e Protruding end 53p Stopper protrusion 56 Inner elastic piece 56a Inner slope 56b Curved section 60 First outer conductor 62 Base end outer cylinder 62a Locking piece 66 Outer elastic piece 66a Outside slope 66b Curved section 70 2nd coaxial connector 72 Second Dielectric 80 Second inner conductor 81 Tapered section 81S1 Slit 81S2 Gap 82 Inner connecting tube 83a, 83b, 83c recesses 86 Opposite side connection tube 86a Locking piece 87 Elastic Piece 90 Second outer conductor 91 Tapered section 92 Outer connection tube 93a, 93b, 93c recesses 96 Opposite side external connection tube 96a Locking piece 97 Elastic Piece 160 First outer conductor 166 Internal contact outer elastic piece 166a Internal contact external slope P1, P2 contact position Ws Gap X center axis

Claims

1. 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 and a first outer conductor surrounding an outer periphery of the first inner conductor, the second coaxial connector includes a second inner conductor and a second outer conductor surrounding an outer periphery of the second inner conductor, the first inner conductor has an inner elastic piece that is elastically deformable in an inward and outward direction; the second inner conductor has an inner connecting tube portion, A connection structure of a coaxial connector, wherein the first inner conductor is inserted and connected to the second inner conductor with the inner elastic piece in elastic contact with an inner peripheral surface of the inner connection tube portion.

2. 2. The coaxial connector connection structure according to claim 1, The first inner conductor has a plurality of the inner elastic pieces, The plurality of inner elastic pieces are arranged at intervals along a circumferential direction of the inner connecting tube portion, A connection structure of a coaxial connector, in which a gap is formed between adjacent ones of the plurality of inner elastic pieces to prevent contact between adjacent inner elastic pieces when the plurality of inner elastic pieces are in elastic contact with the inner surface of the inner connecting tube portion.

3. 3. The coaxial connector connection structure according to claim 1, the inner connecting cylinder portion has a recess that is recessed from a tip end side to a base end side of the inner connecting cylinder portion, A connection structure of a coaxial connector, wherein a circumferential width of the recess is smaller than a circumferential width of the inner elastic piece.

4. 3. The coaxial connector connection structure according to claim 1, A connection structure of a coaxial connector, wherein the contact pressure of the inner elastic piece against the inner connecting tube portion is set to a magnitude that maintains the initial shape of the inner connecting tube portion when the inner elastic piece is in elastic contact with the inner connecting tube portion.

5. 3. The coaxial connector connection structure according to claim 1, A connection structure of a coaxial connector, wherein the first inner conductor is a pressed product of a metal plate.

6. 6. The coaxial connector connection structure according to claim 5, the second inner conductor has an opposite-side connection tube portion, The outer diameter of the opposite connecting cylindrical portion is smaller than the outer diameter of the inner connecting cylindrical portion, a tapered portion between the inner connecting cylindrical portion and the opposite connecting cylindrical portion, the tapered portion having an outer diameter gradually decreasing from the inner connecting cylindrical portion toward the opposite connecting cylindrical portion; A connection structure for a coaxial connector, wherein a slit is formed along a circumferential direction of the inner connection cylindrical portion at a boundary between the inner connection cylindrical portion and the tapered portion.

7. 3. The coaxial connector connection structure according to claim 1, The inner elastic piece includes an inner inclined portion that inclines outward from a base end to a tip end of the inner elastic piece, A connection structure for a coaxial connector, wherein at least a portion of the inner inclined portion is inclined toward the central axis of the inner connecting tube portion, outside the tip opening of the inner connecting tube portion, in the connection direction between the first coaxial connector and the second coaxial connector, as it moves away from the tip of the inner connecting tube portion.

8. 3. The coaxial connector connection structure according to claim 1, one of the first outer conductor and the second outer conductor has an outer elastic piece that is elastically deformable in an inward and outward direction; the other of the first outer conductor and the second outer conductor has an outer connection tube portion, a connection structure of a coaxial connector, in which the other of the first outer conductor and the second outer conductor is inserted and connected to the one of the first outer conductor and the second outer conductor with the outer elastic piece in elastic contact with the outer peripheral surface of the outer connection tube portion.

9. 9. The coaxial connector connection structure according to claim 8, the first outer conductor has the outer elastic piece, the second outer conductor has the outer connection tube portion, A connection structure of a coaxial connector, wherein the second outer conductor is inserted and connected to the first outer conductor with the outer elastic piece in elastic contact with an outer peripheral surface of the outer connection tube portion.

10. 3. The coaxial connector connection structure according to claim 1, the first outer conductor has an inner-contact outer elastic piece that is elastically deformable in an inward and outward direction; the second outer conductor has an outer connection tube portion, the first outer conductor is inserted and connected to the second outer conductor in a state in which the inner-contact outer elastic piece is in elastic contact with an inner circumferential surface of the outer connection tube portion, A connection structure of coaxial connectors, wherein, in a connection direction between the first coaxial connector and the second coaxial connector, the contact position of the internal contact outer elastic piece with the inner surface of the outer connecting tube portion is located closer to the tip of the outer connecting tube portion than the contact position of the inner elastic piece with the inner surface of the inner connecting tube portion.

11. The coaxial connector connection structure according to claim 10, The inner elastic piece includes an inner inclined portion that inclines outward from a base end to a tip end of the inner elastic piece, at least a portion of the inner inclined portion is inclined toward a central axis of the inner connecting cylinder portion as it moves away from the tip of the inner connecting cylinder portion, on the outer side of a tip opening of the inner connecting cylinder portion in the connecting direction, The inner contact outer elastic piece includes an inner contact outer inclined portion inclined outward from a base end to a tip end of the inner contact outer elastic piece, A connection structure of a coaxial connector, wherein at least a portion of the internal contact outer inclined portion is inclined toward the central axis of the outer connection tube portion in the connection direction, outside the tip opening of the outer connection tube portion, as it moves away from the tip of the outer connection tube portion.

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