Terminals and coaxial connectors

Abstract

The objective is to minimize deformation of the terminals fixed to the mounting board from their initial shape while absorbing positional errors of the mating terminals. [Solution] The terminal 62 is a terminal fixed to the mounting board 21 and comprises a connecting portion 63, a plurality of spring leg pieces 64 extending from the connecting portion toward the mounting board, and at least one spring connecting piece 68 extending from the connecting portion toward the opposite side of the spring leg pieces. Each of the plurality of spring leg pieces includes a fixing portion 64f fixed to the mounting board, and the spring connecting piece includes a connecting portion 68b connected to the mating terminal.

Description

Technical Field

[0001] The present disclosure relates to terminals and coaxial connectors.

Background Art

[0002] Patent Document 1 discloses a receptacle including a cylindrical contact, a contact case fitted inside the cylindrical contact, and a crimp contact disposed inside the contact case. The crimp contact has a pair of crimping pieces structured to approach each other so as to sandwich the proximal end side of the shaft-shaped terminal.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] According to the crimp contact disclosed in Patent Document 1, if the positional error of the shaft-shaped terminal is large, the pair of crimping pieces may be greatly deformed from the proximal end.

[0005] Regarding the terminal fixed to the mounting substrate, it is desirable to minimize the deformation from the initial shape and to absorb the positional error of the mating terminal.

[0006] Therefore, an object of the present disclosure is to minimize the deformation from the initial shape and to absorb the positional error of the mating terminal for the terminal fixed to the mounting substrate.

Means for Solving the Problems

[0007] The terminal of this disclosure is a terminal fixed to a mounting board, comprising a connecting portion, a plurality of spring leg pieces extending from the connecting portion toward the mounting board, and at least one spring connecting piece extending from the connecting portion toward the opposite side of the spring leg pieces, wherein each of the plurality of spring leg pieces includes a fixing portion fixed to the mounting board, and the spring connecting piece includes a connecting portion connected to a mating terminal.

[0008] The coaxial connector of this disclosure is a coaxial connector comprising the above-mentioned terminal, a dielectric surrounding the terminal, and an outer conductor surrounding the dielectric. [Effects of the Invention]

[0009] According to this disclosure, the terminals fixed to the mounting board can absorb positional errors of the mating terminals while minimizing deformation from their initial shape. [Brief explanation of the drawing]

[0010] [Figure 1] Figure 1 is a perspective view showing the equipment according to an embodiment. [Figure 2] Figure 2 is a cross-sectional view taken along line II-II in Figure 1. [Figure 3] Figure 3 is a disassembled perspective view of the device. [Figure 4] Figure 4 is a perspective view showing a relay coaxial connector. [Figure 5] Figure 5 is a plan view showing a relay coaxial connector. [Figure 6] Figure 6 is an exploded perspective view showing a relay coaxial connector. [Figure 7] Figure 7 is a side view showing a relay coaxial connector. [Figure 8] Figure 8 is a cross-sectional view taken along line VIII-VIII in Figure 7. [Figure 9] Figure 9 is a cross-sectional view taken along the line IX-IX in Figure 5. [Figure 10] Figure 10 is an exploded perspective view of the coaxial connector on the circuit board side. [Figure 11] Figure 11 is a plan view showing the coaxial connector on the circuit board side. [Figure 12] Figure 12 is a perspective view showing the inner conductor. [Figure 13] Figure 13 is a side view showing the inner conductor.

Embodiments for Carrying out the Invention

[0011] [Description of Embodiments of the Present Disclosure] First, embodiments of the present disclosure will be listed and described.

[0012] The terminals of the present disclosure are as follows.

[0013] (1) A terminal fixed to a mounting substrate, comprising a connecting portion, a plurality of spring leg pieces extending from the connecting portion toward the mounting substrate side, and at least one spring connection piece extending from the connecting portion to the side opposite to the spring leg pieces, each of the plurality of spring leg pieces including a fixing portion fixed to the mounting substrate, and the spring connection piece including a connection portion connected to a mating terminal.

[0014] When the mating terminal is connected to the spring connection piece, assume that the mating terminal is largely misaligned. In this case, according to the terminal of the present disclosure, both the plurality of spring leg pieces and the spring connection piece can be deformed to absorb the positional error of the mating terminal. Since there is a connecting portion between the plurality of spring leg pieces and the spring connection piece, the positional relationship of the plurality of spring leg pieces is difficult to vary greatly. Therefore, the deformation of the entire terminal from the initial shape can be made as small as possible. Therefore, for the terminal fixed to the mounting substrate, the positional error of the mating terminal can be absorbed while minimizing the deformation from the initial shape.

[0015] (2) The terminal of (1), wherein the connecting portion is an annular connecting portion, and the plurality of spring leg pieces may be arranged annularly at intervals along the annular direction of the annular connecting portion.

[0016] Thereby, it is easy to maintain the state where the spring leg pieces are arranged annularly.

[0017] (3) The terminal of (1) or (2), wherein the number of the plurality of spring leg pieces may be four.

[0018] This allows the four spring legs to stably support the connecting section and easily absorb positional errors.

[0019] (4) Any one of the terminals from (1) to (3), and the plurality of spring legs may support the connecting portion at a position away from the mounting substrate.

[0020] In this case, the multiple spring legs support the connection point at a position away from the mounting board, allowing the multiple spring legs to deform significantly and easily displace the connection point. Further spring connecting pieces extend from this connection point, making it easier to accommodate positional errors of the mating terminal.

[0021] (5) Any one of the terminals from (1) to (4), wherein each of the plurality of spring leg pieces includes a first bent portion and a second bent portion located on the tip side of the first bent portion, the first bent portion being a portion that bends so as to be convex toward the opposite side of the connecting portion, and the second bent portion being a portion that bends so as to be convex toward the connecting portion.

[0022] Thus, each of the multiple spring leg segments includes a first bending return portion and a second bending return portion, making it highly elastic and easily deformable.

[0023] (6)(5) The terminals, wherein at least one of the first bent portion and the second bent portion may include a curved portion.

[0024] Thus, by including a curved portion in at least one of the first and second bending portions, the spring leg can be deformed in various directions.

[0025] (7)(6) The terminals of the above, wherein the first bent portion includes the curved portion, and the second bent portion may include a sharply bent portion that bends more sharply than the curved portion.

[0026] In this case, the curved section can be deformed more easily than the sharply bent section. When accommodating positional errors of the mating terminal, the spring leg can be deformed mainly on the first bent-back section side. Therefore, the fixing part at the tip of the spring leg becomes less prone to displacement, and the fixed state between the fixing part and the mounted circuit board is more easily maintained.

[0027] (8) Any one of the terminals from (1) to (7), and the number of the at least one spring connecting piece may be multiple.

[0028] In this case, the relative positions of the multiple spring connecting pieces are less likely to change significantly. Therefore, deformation of the terminal as a whole from its initial shape is more suppressed.

[0029] (9) Any one of the terminals from (1) to (3), wherein the number of the at least one spring connecting piece is multiple, and the multiple spring connecting pieces may be arranged in a ring with intervals along the ring direction of the ring connecting portion.

[0030] This makes it easier to maintain the ring-shaped arrangement of the spring connecting pieces.

[0031] The coaxial connector of this disclosure is as follows:

[0032] (10) A coaxial connector comprising one of the terminals (1) through (9), a dielectric surrounding the terminal, and an outer conductor surrounding the dielectric.

[0033] The terminals can accommodate positional errors in the mating terminals. Even if the terminals deform to accommodate positional errors in the mating terminals, the deformation of the terminals from their initial shape is minimal. Therefore, fluctuations in the relative positional relationship between the terminals and the outer conductor are reduced, resulting in stable high-frequency signal transmission characteristics.

[0034] [Details of the embodiments of this disclosure] Specific examples of the terminals and coaxial connectors of this disclosure will be described below with reference to the drawings. However, this disclosure is not limited to these examples, and all modifications are intended to be included in the meaning and scope equivalent to the claims as indicated by the claims.

[0035] [Embodiment] The following describes terminals and coaxial connectors according to the embodiments. An example in which the inner conductor of the board-side coaxial connector is a terminal will be described.

[0036] <Example of overall equipment configuration> An example of equipment equipped with a coaxial connector is described below. Figure 1 is a perspective view of equipment 10. Figure 2 is a cross-sectional view taken along line II-II of Figure 1. Figure 3 is an exploded perspective view of equipment 10. In Figures 2 and 3, part of the case is omitted, and in Figure 3, the mounting circuit board is omitted.

[0037] Device 10 is, for example, a camera. The camera is, for example, an in-vehicle device. Device 10 does not have to be a camera.

[0038] The device 10 comprises a case 12 and electrical components 20. The electrical components 20 are housed inside the case 12.

[0039] A board-side coaxial connector 60 is fixed to the electrical component 20. The board-side coaxial connector 60 is connected to the circuit of the electrical component 20. A relay coaxial connector 30 is fixed to the case 12. An external cable is connected to the relay coaxial connector 30. Inside the case 12, the board-side coaxial connector 60 and the relay coaxial connector 30 are connected. The external cable is, for example, a coaxial cable connected to an external electrical component. A cable connector that can be connected to the relay coaxial connector 30 is attached to the end of the external cable. By connecting the external cable to the relay coaxial connector 30 outside the case 12, the external electrical component is connected to the electrical component 20 via the external cable, the relay coaxial connector 30, and the board-side coaxial connector 60.

[0040] More specifically, case 12 comprises a first case 13 and a second case 14. The first case 13 and the second case 14 are formed of, for example, resin or metal. A metal shielding component may be placed inside the resin housing. The first case 13 and the second case 14 are combined to form a rectangular box-shaped case 12 that houses the electrical components 20. If the device 10 is a camera device, it is assumed that the first case 13 has an imaging lens or window, and the second case 14 has a relay coaxial connector 30.

[0041] More specifically, a retaining cylinder portion 16 is provided protruding from the bottom portion 15 of the case 12. The retaining cylinder portion 16 is cylindrical and protrudes outward from the center of the bottom portion 15. The inner opening of the retaining cylinder portion 16 opens into the second case 14, and the outer opening of the retaining cylinder portion 16 opens outside the second case 14. A retaining partition portion 17 is formed in the middle of the retaining cylinder portion 16 in the direction along the central axis X (axial direction). In this embodiment, the retaining partition portion 17 is formed in the middle of the retaining cylinder portion 16 in the direction along the central axis X and closer to the inner opening. The retaining partition portion 17 separates the space on the inner opening side of the retaining cylinder portion 16 from the space on the outer opening side. A retaining hole 17h is formed in the retaining partition portion 17, and the relay coaxial connector 30 is inserted into and held in the retaining hole 17h.

[0042] In this embodiment, a locking projection 18a is formed on the outer circumference of the retaining cylinder portion 16 for holding a cable connector attached to the end of the cable. The formation of the locking projection 18a is not essential.

[0043] The intermediate coaxial connector 30 comprises an inner conductor 32, a dielectric 40, and an outer conductor 50. The dielectric 40 surrounds the inner conductor 32. The outer conductor 50 surrounds the dielectric 40.

[0044] The intermediate portion of the intermediate coaxial connector 30 is held by the retaining hole 17h. One end of the intermediate coaxial connector 30 protrudes from the retaining partition 17 into the retaining cylinder 16. The other end of the intermediate coaxial connector 30 protrudes from the retaining partition 17 into the second case 14.

[0045] The electrical component 20 is, for example, a circuit board on which electronic components are mounted. If the device 10 is a camera device, the electrical component 20 is assumed to be a circuit board 21 and an image sensor 22 mounted on the circuit board 21. The image sensor 22 faces the imaging lens or window of the first case 13 and rotates the lens or window to capture the outside scenery. Hereinafter, the side of the first case 13 that the image sensor 22 faces may be referred to as the front side, and the opposite side, the second case 14 side, may be referred to as the rear side.

[0046] In this embodiment, the substrate-side coaxial connector 60 is located on the circuit board 21 on the side opposite to the image sensor 22. The substrate-side coaxial connector 60 is fixed to the circuit board 21 and protrudes from the circuit board 21 toward the relay coaxial connector 30.

[0047] The board-side coaxial connector 60 comprises, for example, an inner conductor 62, a dielectric 70, and an outer conductor 80. The inner conductor 62 and the outer conductor 80 are each connected to a circuit on the circuit board 21. For example, the inner conductor 62 and the outer conductor 80 are each soldered to a circuit on the circuit board 21. This soldering may fix the board-side coaxial connector 60 to the circuit board 21. The inner conductor 62 is an example of a terminal fixed to an electrical component 20 which is a mounting board.

[0048] The inner conductor 32 is connected to the inner conductor 62. The dielectric 70 surrounds the inner conductor 62. The outer conductor 80 surrounds the dielectric 70. The outer conductor 50 is connected to the outer conductor 80.

[0049] The cable connector of the external cable is connected to the intermediate coaxial connector 30 from the outside of the case 12. The central conductor of the external cable is connected to the circuit of the electrical component 20 via the inner conductor 32 of the intermediate coaxial connector 30 and the inner conductor 62 of the board-side coaxial connector 60. The outer conductor of the external cable is connected to the other circuits of the electrical component 20 via the outer conductor 50 of the intermediate coaxial connector 30 and the outer conductor 80 of the board-side coaxial connector 60.

[0050] In both the intermediate coaxial connector 30 and the board-side coaxial connector 60, dielectrics 40 and 70 are interposed between the inner conductors 32 and 62 and the outer conductors 50 and 80, causing the inner conductors 32 and 62 and the outer conductors 50 and 80 to be concentric. As a result, good shielding performance can be obtained in the intermediate coaxial connector 30 and the board-side coaxial connector 60, and a connection structure with stable impedance performance and excellent high-frequency signal transmission characteristics can be easily obtained.

[0051] <Regarding coaxial connectors for external connections> The intermediate coaxial connector 30 will be explained in more detail. Figure 4 is a perspective view showing the intermediate coaxial connector 30. Figure 5 is a plan view showing the intermediate coaxial connector 30. Figure 6 is an exploded perspective view showing the intermediate coaxial connector 30. Figure 8 is a cross-sectional view taken along line VIII-VIII in Figure 7. Figure 9 is a cross-sectional view taken along line IX-IX in Figure 5.

[0052] As described above, the relay coaxial connector 30 comprises an inner conductor 32, a dielectric 40, and an outer conductor 50.

[0053] <About the internal conductor> The inner conductor 32 is made of a conductive material such as metal. The inner conductor 32 is formed in an elongated shape. More specifically, the inner conductor 32 is configured with a cylindrical portion 33, an intermediate portion 34, and a rod-shaped portion 35 connected in that order. The intermediate portion 34 is thinner than the cylindrical portion 33, and the rod-shaped portion 35 is thinner than the intermediate portion 34.

[0054] The cylindrical portion 33 is formed in a cylindrical shape. One end of the cylindrical portion 33 is open, and the other end is closed. The closed end of the cylindrical portion 33 is tapered, gradually narrowing towards the intermediate portion 34. A portion of the circumferential part of the closed end of the cylindrical portion 33 protrudes partially, forming a rotation-stopping projection 33p.

[0055] An intermediate portion 34 protrudes from the center of the closed end of the cylindrical portion 33. A retaining projection 34p is formed on the outer circumference of the intermediate portion 34.

[0056] The rod-shaped portion 35 is formed as a rod protruding from the center of the end of the intermediate portion 34 opposite to the cylindrical portion 33. The rod-shaped portion 35 is the part used for connecting to the inner conductor of the cable connector.

[0057] The inner conductor 32 may be formed, for example, by cutting a metal body.

[0058] <About dielectrics> The dielectric 40 is formed of an insulating material such as resin. The dielectric 40 surrounds the inner conductor 32. The dielectric 40 only needs to surround at least a portion of the inner conductor 32.

[0059] In this embodiment, the dielectric 40 is formed in a cylindrical shape. The outer diameter of the dielectric 40 may be larger than the outer diameter of the cylindrical portion 33. A through hole 40h is formed in the center of the dielectric 40. The through hole 40h has a shape in which a wide inner diameter portion 40h1, an intermediate inner diameter portion 40h2, and a narrow inner diameter portion 40h3 are arranged in this order. The outer diameters of the wide inner diameter portion 40h1, the intermediate inner diameter portion 40h2, and the narrow inner diameter portion 40h3 are formed to become narrower in this order.

[0060] The rod-shaped portion 35 is inserted into the narrow inner diameter portion 40h3, the intermediate portion 34 is inserted into the intermediate inner diameter portion 40h2, and the cylindrical portion 33 is inserted into the wide inner diameter portion 40h1. The retaining projection 34p of the intermediate portion 34 locks into the inner circumference of the intermediate inner diameter portion 40h2, thereby preventing the inner conductor 32 from coming out of the dielectric 40.

[0061] A partial recess 40h2g is formed on the inner circumference of the intermediate inner diameter portion 40h2 to receive the rotation-stopping projection 33p. When the rotation-stopping projection 33p fits into the partial recess 40h2g, the rotation of the inner conductor 32 relative to the dielectric 40 is prevented.

[0062] With the inner conductor 32 inserted into the dielectric 40, the rod-shaped portion 35 passes through the narrow inner diameter portion 40h3 and protrudes from the dielectric 40. Also, the open end of the cylindrical portion 33 protrudes from the wide inner diameter portion 40h1. The inner conductor 62 of the substrate-side coaxial connector 60 is inserted and connected into the cylindrical portion 33. The inner conductor 62 has a spring connecting piece 68 (see Figure 2), and it is preferable that the positional error between the inner conductor 62 and the inner conductor 32 is absorbed by the elastic deformation of the spring connecting piece 68.

[0063] A partial position-restricting recess 40g is formed on the outer periphery of the dielectric 40.

[0064] <About the outer conductor> The outer conductor 50 comprises an outer conductor cylindrical portion 52 and a plurality of spring pieces 54. The outer conductor 50 is made of metal. The outer conductor 50 is formed, for example, by press working of a metal sheet. For example, a metal sheet is punched out into a shape having a strip-shaped portion and a plurality of elongated pieces extending in parallel from one side edge of the strip-shaped portion. The plurality of elongated pieces are press-formed into the shape of spring pieces 54. The outer conductor cylindrical portion 52 is formed by press-forming the strip-shaped portion into an annular shape.

[0065] <Regarding the outer conductor tube section> The outer conductor cylinder portion 52 is an example of a conductor cylinder. In other words, the outer conductor 50 includes the outer conductor cylinder portion 52 as a conductor cylinder.

[0066] The outer conductor cylinder portion 52 is fitted onto the dielectric 40 while in contact with the dielectric 40. For example, the outer conductor cylinder portion 52 is formed so that the dielectric 40 can be inserted into it. For example, the inner diameter of the outer conductor cylinder portion 52 is set to be larger than the outer diameter of the dielectric 40 and to be large enough to hold the dielectric 40 without any play. The dielectric 40 is an example of an insert that is inserted into the outer conductor cylinder portion 52, which acts as a conductor cylinder.

[0067] The length of the outer conductor cylinder portion 52 may be set to be greater than the length of the dielectric 40. The open end of the outer conductor cylinder portion 52 on the side of the wide inner diameter portion 40h1 may coincide with the end of the outer conductor cylinder portion 52, may protrude beyond that end, or may be located inside that end.

[0068] The end of the outer conductor cylinder 52 on the side from which the rod-shaped portion 35 extends may protrude beyond the dielectric 40. The end of the outer conductor cylinder 52 on the side from which the rod-shaped portion 35 extends may protrude more than the tip of the dielectric 40. The end of the outer conductor cylinder 52 on the side from which the rod-shaped portion 35 extends is the part used for connection with the outer conductor of the cable.

[0069] A strip-shaped portion of the metal plate is rolled up and processed into an outer conductor tube portion 52. The outer conductor tube portion 52 comprises a tube body 52B, a first end edge portion 52E1, and a second end edge portion 52E2. The tube body 52B is the portion of the outer conductor tube portion 52 that forms a tube shape. In other words, the tube body 52B is the portion of the outer conductor tube portion 52 excluding the opposing portions at both ends in the circumferential direction. The first end edge portion 52E1 is the portion located on one end side in the circumferential direction of the tube body 52B. The first end edge portion 52E1 is the end edge portion that extends along the central axis X. The second end edge portion 52E2 is the portion located on the other end side in the circumferential direction of the tube body 52B. The second end edge portion 52E2 is the end edge portion that extends along the central axis X. The first end edge portion 52E1 and the second end edge portion 52E2 face each other in the circumferential direction of the tube body 52B. In other words, the first edge portion 52E1 and the second edge portion 52E2 are the parts that become the joint when the strip portion is rolled up.

[0070] In some cases, it is desirable for the outer conductor cylinder portion 52 to have a shape close to a perfect circle. For example, in the intermediate coaxial connector 30, if the outer conductor cylinder portion 52 has a shape close to a perfect circle, a concentric circle structure centered on the inner conductor 32 can be realized, which may result in improved high-frequency signal transmission characteristics.

[0071] If the first end edge 52E1 and the second end edge 52E2 are misaligned with each other in the direction of the central axis X, or misaligned, separated, or overlapping in the inner and outer circumferences, the cylindrical shape of the outer conductor cylinder 52 will be distorted.

[0072] A simple configuration for maintaining the cylindrical shape of the conductor tube is described below.

[0073] The first end edge 52E1 has a protrusion 52EP1. The protrusion 52EP1 projects toward the second end edge 52E2. The protrusion 52EP1 partially protrudes in the longitudinal direction of the first end edge 52E1. The protrusion 52EP1 is shaped to protrude, for example, when viewed from the outer circumference of the cylindrical body 52B. Such a protrusion 52EP1 can be easily formed by punching a metal sheet.

[0074] The second end edge 52E2 has a recess 52EC2. The recess 52EC2 is recessed in a direction away from the first end edge 52E1. The recess 52EC2 is partially recessed in the longitudinal direction of the second end edge 52E2. For example, the recess 52EC2 is recessed when viewed from the outer circumference of the cylindrical body 52B. Such a recess 52EC2 can be easily formed by punching a metal sheet.

[0075] The recess 52EC2 faces the protrusion 52EP1 in the circumferential direction of the outer conductor cylinder portion 52. The recess 52EC2 is formed in a shape that allows the protrusion 52EP1 to be fitted into it.

[0076] The protrusion 52EP1 is fitted into the recess 52EC2, making it difficult for the first end edge 52E1 and the second end edge 52E2 to shift relative to each other in the direction along the central axis X.

[0077] The dimensions of the convex portion 52EP1 may be set such that it is press-fitted into the concave portion 52EC2. In this case, the first end edge portion 52E1 and the second end edge portion 52E2 are unlikely to move away from each other, and the outer conductor cylinder portion 52 is unlikely to shift from each other in the radial direction.

[0078] The protrusion 52EP1 may have a head portion 52EP1a that is wider than the base. In this embodiment, the protrusion 52EP1 is an isosceles trapezoid shape in which the upper base is shorter than the lower base, and the upper base is connected to the cylindrical body 52B side. The lower base portion of the protrusion 52EP1 is the head portion 52EP1a.

[0079] The convex portion 52EP1 may be formed in a partially recessed portion of the longitudinal middle part of the first end edge portion 52E1. In this embodiment, the longitudinal middle part of the first end edge portion 52E1 is partially recessed in an isosceles trapezoid shape where the upper base is shorter than the lower base. The shorter upper base portion of the recess in the isosceles trapezoidal portion faces the cylindrical body 52B side, and the longer upper base portion opens towards the second end edge portion 52E2 side.

[0080] The recess 52EC2 is formed in a shape that allows the head portion 52EP1a to be fitted in a locking state. For example, the recess 52EC2 is formed in a recessed shape that is the same shape as the convex portion 52EP1. In this embodiment, the recess 52EC2 is the same shape as the convex portion 52EP1, that is, it is an isosceles trapezoid shape in which the upper base is shorter than the lower base, with the longer upper base facing the cylindrical body 52B side and the shorter lower base facing the first end edge portion 52E1 side.

[0081] The recess 52EC2 may be formed in a partially protruding portion of the longitudinal middle part of the second end edge 52E2. In this embodiment, the longitudinal middle part of the second end edge 52E2 partially protrudes in an isosceles trapezoidal shape where the upper base is shorter than the lower base. The longer upper base portion of the isosceles trapezoidal portion faces the cylindrical body 52B side, and the shorter upper base portion opens towards the first end edge 52E1 side. The isosceles trapezoidal portion can fit into the recess of the isosceles trapezoidal portion on the first end edge 52E1 side.

[0082] When the convex portion 52EP1 fits into the recess 52EC2, the head portion 52EP1a is restricted from moving toward the opening side of the recess 52EC2, preventing the convex portion 52EP1 from being removed from the recess 52EC2. As a result, the first end edge portion 52E1 and the second end edge portion 52E2 become less likely to separate in the circumferential direction of the outer conductor cylinder portion 52.

[0083] The cylindrical body 52B has an outer locking portion 52p3 and an inner locking portion 52p2. The outer locking portion 52p3 is the part that locks onto the inner circumferential surface of the retaining hole 17h. The inner circumferential surface of the retaining hole 17h is an example of a retaining surface surrounding the cylindrical body 52B. The inner locking portion 52p2 is the part that locks onto the dielectric 40, which is the insert.

[0084] The outer locking portion 52p3 engages with the inner circumferential surface of the holding hole 17h, thereby holding the outer conductor cylinder portion 52 in a fixed position relative to the holding hole 17h. At least the portion of the outer conductor cylinder portion 52 on which the outer locking portion 52p3 is formed, and its surrounding area, are surrounded by the inner circumferential surface of the holding hole 17h.

[0085] Furthermore, the inner locking portion 52p2 engages with the dielectric 40, thereby holding the dielectric 40 in a fixed position relative to the outer conductor cylinder portion 52. At least the portion of the outer conductor cylinder portion 52 on which the inner locking portion 52p2 is formed, and its surrounding area, face the outer circumferential surface of the dielectric 40.

[0086] At least a portion of the cylindrical body 52B faces the inner surface of the retaining hole 17h on its outer circumference, and at least a portion of the cylindrical body 52B faces the outer surface of the dielectric 40 on its inner circumference. Therefore, the cylindrical body 52B is less likely to deform in the inner or outer circumference. The first end edge 52E1 and the second end edge 52E2 located at both ends of the cylindrical body 52B are also less likely to shift position in the radial direction of the outer conductor cylindrical portion 52. As a result, the recess 52EC2 and the protrusion 52EP1 are less likely to shift position in the thickness direction, and the engagement between the recess 52EC2 and the protrusion 52EP1 is less likely to be released.

[0087] The outer locking portion 52p3 should be formed in a position that allows it to lock onto the inner circumferential surface of the retaining hole 17h, and the inner locking portion 52p2 should be formed in a position that allows it to lock onto the dielectric 40.

[0088] At least a portion of the outer locking portion 52p3 and at least a portion of the inner locking portion 52p2 may be located between the inner circumferential surface of the retaining hole 17h and the outer circumferential surface of the dielectric 40.

[0089] For example, the region of the cylindrical body 52B that overlaps with both the inner surface of the retaining hole 17h and the outer surface of the dielectric 40, and is sandwiched between the inner surface of the retaining hole 17h and the outer surface of the dielectric 40, is defined as the sandwiching region.

[0090] At least a portion of the outer locking portion 52p3 and at least a portion of the inner locking portion 52p2 may be located in the clamping region. In this embodiment, the entire outer locking portion 52p3 and the entire inner locking portion 52p2 are located in the clamping region.

[0091] For example, it is assumed that the intermediate coaxial connector 30 is inserted into the holding hole 17h with the dielectric 40 inserted into the outer conductor cylinder portion 52.

[0092] When the dielectric 40 is inserted into the outer conductor cylinder 52, the inner locking portion 52p2 may come into contact with the outer circumferential surface of the dielectric 40, causing the inner locking portion 52p2 to be pushed outwards. Subsequently, when the outer conductor cylinder 52 is inserted into the holding hole 17h, the outer locking portion 52p3 comes into contact with the inner circumferential surface of the holding hole 17h, causing the outer locking portion 52p3 to be pushed outwards.

[0093] As a result, in the clamping region, the inner locking portion 52p2 is pushed outward, and the outer locking portion 52p3 is pushed inward. Therefore, it is difficult for the inner locking portion 52p2 to be excessively displaced outward, or for the outer locking portion 52p3 to be excessively displaced inward. In addition, the inner locking portion 52p2 can be strongly locked to the outer surface of the dielectric 40, and the outer locking portion 52p3 can be strongly locked to the inner surface of the holding hole 17h. This suppresses the outer conductor cylinder portion 52 from coming out of the holding hole 17h and the dielectric 40 from coming out of the outer conductor cylinder portion 52.

[0094] The outer locking portion 52p3 is a portion that protrudes to the outer circumference of the cylindrical body 52B, and the inner locking portion 52p2 is a portion that protrudes to the inner circumference of the cylindrical body 52B. The outer locking portion 52p3 and the inner locking portion 52p2 may be formed, for example, by press working.

[0095] The outer locking portion 52p3 and the inner locking portion 52p2 may be positioned offset along the central axis X of the cylindrical body 52B.

[0096] As a result, the pressed portions, such as the outer locking portion 52p3 and the inner locking portion 52p2, are not concentrated in the direction of the central axis X of the cylindrical body 52B, but are instead dispersed. Therefore, the strength of the cylindrical body 52B is more easily maintained. In addition, due to the pressing process, it may be difficult to form portions with different protruding directions near the metal plate. If the outer locking portion 52p3 and the inner locking portion 52p2 are offset in the direction of the central axis X of the cylindrical body 52B, it is easier to position the outer locking portion 52p3 and the inner locking portion 52p2 apart, and portions protruding in different directions can be easily formed.

[0097] The shapes of the outer locking portion 52p3 and the inner locking portion 52p2 are arbitrary, but they may be formed in the following shapes.

[0098] In other words, the outer locking portion 52p3 is a portion of the cylindrical body 52B that has been press-formed into a partial triangular region on the outer circumference of the cylindrical body 52B. More specifically, the outer locking portion 52p3 is formed by shearing the base of a partial isosceles triangular region of the cylindrical body 52B and causing the region enclosed by the two hypotenuses to protrude outwards. In this case, the outer locking portion 52p3 is formed in a shape that gradually rises towards one side (for example, the inside of the case 12) along the central axis X. The sheared surface of the outer locking portion 52p3 faces one side (for example, the inside of the case 12) along the central axis X.

[0099] When the outer conductor cylinder portion 52 is inserted into the retaining hole 17h from the inside of the case 12, the outer inclined surface of the outer locking portion 52p3 is pressed against the inner circumferential surface of the retaining hole 17h. As the outer conductor cylinder portion 52 is pushed further in, the outer locking portion 52p3 enters the retaining hole 17h through at least one of the following actions: the apex of the outer locking portion 52p3 scrapes the inner circumferential surface of the retaining hole 17h, the inner circumferential surface is elastically deformed, or the outer conductor cylinder portion 52 itself is elastically deformed.

[0100] When the outer conductor cylinder portion 52 is inserted into a predetermined position within the retaining hole 17h, the outer locking portion 52p3 engages with the inner circumferential surface of the retaining hole 17h. In particular, the shear surface of the outer locking portion 52p3 engages with the inner circumferential surface. This prevents the outer conductor cylinder portion 52 from coming out, and in particular, prevents it from coming out in the opposite direction to the insertion direction.

[0101] The inner locking portion 52p2 is a portion of the cylindrical body 52B that has been press-formed to the inner circumference of the cylindrical body 52B. More specifically, the inner locking portion 52p2 is formed by shearing the base of the other isosceles triangular region of the cylindrical body 52B and causing the region enclosed by the two hypotenuses to protrude inward. In this case, the inner locking portion 52p2 is formed in a shape that gradually rises along the central axis X toward the other side (for example, the outside of the case 12). The sheared surface of the outer locking portion 52p3 faces toward the other side (for example, the outside of the case 12) along the central axis X.

[0102] In other words, in the radial direction of the outer conductor cylinder portion 52, the inner locking portion 52p2 protrudes in the opposite direction to the outer locking portion 52p3. Also, in the direction along the central axis X, the inner locking portion 52p2 gradually rises in the opposite direction to the outer locking portion 52p3. Furthermore, the shear surface of the inner locking portion 52p2 and the shear surface of the outer locking portion 52p3 face opposite directions.

[0103] When the dielectric 40 is inserted into the outer conductor cylinder 52 from the spring piece 54 side (the opening side located inside the case 12), the inclined surface of the inner locking portion 52p2 is pressed against the outer circumferential surface of the dielectric 40. As the dielectric 40 is pushed in further, the inner locking portion 52p2 penetrates into the outer circumferential surface of the dielectric 40 by at least one of the following actions: the apex of the inner locking portion 52p2 scrapes the outer circumferential surface of the dielectric 40, the outer circumferential surface is elastically deformed, or the outer conductor cylinder 52 itself is elastically deformed.

[0104] When the dielectric 40 is inserted into a predetermined position within the outer conductor cylinder 52, the inner locking portion 52p2 engages with the outer circumferential surface of the dielectric 40. In particular, the shear surface of the inner locking portion 52p2 engages with the outer circumferential surface. This prevents the dielectric 40 from being pulled out, especially in the direction opposite to the insertion direction.

[0105] The outer hypotenuse 52p3e of the outer locking portion 52p3, which is inclined with respect to the central axis X, and the inner hypotenuse 52p2e of the inner locking portion 52p2, which is inclined with respect to the central axis X, face each other.

[0106] In this embodiment, the outer locking portion 52p3 and the inner locking portion 52p2 are offset from each other in the direction along the central axis X. The shear surfaces of the outer locking portion 52p3 and the inner locking portion 52p2 are located on opposite sides of each other in the direction along the central axis X and face outwards.

[0107] The inner hypotenuse 52p2e of the inner locking portion 52p2 is located at a position offset along the central axis X from the outer hypotenuse 52p3e of the outer locking portion 52p3, and also at a position offset in the circumferential direction of the outer locking portion 52p3. The outer hypotenuse 52p3e and the inner hypotenuse 52p2e may be parallel.

[0108] Thus, if the outer hypotenuse 52p3e and the inner hypotenuse 52p2e are spaced apart and facing each other, it is easier to position the outer locking portion 52p3 and the inner locking portion 52p2 far apart. This makes it possible to increase the distance between the press-formed parts in the cylindrical body 52B, and thus easier to ensure the strength of the cylindrical body 52B.

[0109] The positional relationship between the recess 52EC2, the protrusion 52EP1, and the inner locking portion 52p2 and the outer locking portion 52p3 is arbitrary.

[0110] At least a portion of the part of the protrusion 52EP1 that fits into the recess 52EC2 may be positioned offset from the inner locking portion 52p2 along the central axis X.

[0111] In this embodiment, the entire portion of the protrusion 52EP1 that fits into the recess 52EC2 is positioned along the central axis X, away from the inner locking portion 52p2 and the spring piece 54.

[0112] For example, when the dielectric 40 is inserted into the outer conductor cylinder 52, the inner locking portion 52p2 comes into contact with the surface of the dielectric 40. As a result, a force acts on the outer conductor cylinder 52 in a direction that expands the outer conductor cylinder 52.

[0113] If the portion of the protrusion 52EP1 that fits into the recess 52EC2 is located away from the inner locking portion 52p2, the spreading force is less likely to act directly on the fitting portion. For example, even if the first end edge 52E1 and the second end edge 52E2 partially open in the area where the inner locking portion 52p2 is located, the fitting state of the protrusion 52EP1 into the recess 52EC2 is easily maintained.

[0114] After the dielectric 40 is inserted into the outer conductor cylinder portion 52, the intermediate coaxial connector 30 is inserted into the retaining hole 17h, which pushes the outer conductor cylinder portion 52 inward by the retaining hole 17h, thereby maintaining its cylindrical shape.

[0115] A partial inner position-restricting projection 52p1 is formed on the outer conductor cylinder portion 52, and this inner position-restricting projection 52p1 fits into the position-restricting recess 40g. This prevents the dielectric 40 from rotating relative to the outer conductor cylinder portion 52 and restricts the movement of the dielectric 40 in the direction in which the tip of the rod-shaped portion 35 is pointing.

[0116] An outer position-restricting projection 52p4 is formed on the outer conductor cylinder portion 52. The outer position-restricting projection 52p4 fits into a partial recess formed on the inner circumference of the retaining hole 17h, thereby preventing the outer conductor cylinder portion 52 from rotating relative to the retaining hole 17h and restricting its position toward the outside of the case 12.

[0117] In the portion where the dielectric 40 and inner conductor 32 are arranged within the outer conductor cylinder 52, a concentric circle structure is easily realized.

[0118] <About the spring piece> The multiple spring pieces 54 are integrally formed with the outer conductor cylinder portion 52. For example, the outer conductor cylinder portion 52 and the multiple spring pieces 54 are integrally formed by pressing or other processes on a single metal plate.

[0119] Multiple spring pieces 54 extend from the opening edge of the outer conductor cylinder portion 52. More specifically, the multiple spring pieces 54 extend from the opening edge opposite to the rod-shaped portion 35.

[0120] In this embodiment, the outer conductor cylinder 52 has six spring pieces 54. Having six spring pieces 54 makes it easier to completely surround the inner conductor 32. Surrounding the inner conductor 32 with six spring pieces 54 makes it easier to ensure contact between the outer conductor 80 and the outer conductor cylinder 52, regardless of the direction in which the outer conductor cylinder 52 is misaligned relative to the outer conductor 80. Furthermore, the six spring pieces 54 are easily arranged in a symmetry around the inner conductor 32, making it easier to obtain good high-frequency signal transmission characteristics.

[0121] The number of spring segments is arbitrary; for example, there may be four or five spring segments, or seven or more.

[0122] Furthermore, the high-frequency signal transmission characteristics and the contact stability between the spring segments and the outer conductor may depend on the shape, thickness, and number of the spring segments. For example, if the spring segments are too thin, they will deform easily, but it will be difficult to secure the necessary compressive force. Also, gaps are likely to form between the spring segments. The width and number of spring segments should be set taking these factors into consideration.

[0123] As in this embodiment, the extension piece 53 may extend from the opening edge of the outer conductor cylinder portion 52. The extension piece 53 may extend in a direction perpendicular to the central axis X of the outer conductor cylinder portion 52. The extension piece 53 may extend on the side opposite to the outer position regulating projection 52p4.

[0124] The extension piece 53 and the multiple spring pieces 54 may extend radially from the opening edge of the outer conductor cylinder portion 52. The angles between the extension piece 53 and the multiple spring pieces 54 may be equal or different.

[0125] The extension piece 53 may be in contact with the bottom portion 15 from the inside of the case 12.

[0126] Each spring piece 54 has a base end 55, a contact portion 57, and a curved portion 56. The base end 55 is the part of the spring piece 54 that connects to the outer conductor cylinder portion 52. The contact portion 57 is the part that contacts the outer conductor 80, which is the mating terminal. The curved portion 56 is the part located between the base end 55 and the contact portion 57. The curved portion 56 has a curved shape that is convex outward.

[0127] In this embodiment, each of the spring pieces 54 further has a guide portion 58 that extends from the contact portion 57 toward the tip. The guide portion 58 is inclined away from the outer conductor cylinder 52 and away from the central axis X in a direction along the central axis X of the outer conductor cylinder 52 from the contact portion 57.

[0128] The overall shape of the spring piece 54 is such that, in the direction of the central axis X, as it moves away from the opening edge of the outer conductor cylinder 52, it first moves toward the outer circumference of the outer conductor cylinder 52, then toward the inner circumference, and then toward the outer circumference again.

[0129] The height H of the spring piece 54 relative to the outer conductor cylinder 52 may be set to be greater than or equal to the radius r of the outer conductor cylinder 52. The height H may also be set to be 1.5 times or more the radius r.

[0130] Here, the height H of the spring piece 54 relative to the outer conductor cylinder 52 is the height of the spring piece 54 relative to the outer circumferential surface of the outer conductor cylinder 52 or its extension. The highest part of the spring piece 54 relative to the outer circumferential surface of the outer conductor cylinder 52 or its extension is the apex Pt of the curved portion 56. Also, the radius r of the outer conductor cylinder 52 is the radius of the outer circumferential surface of the outer conductor cylinder 52.

[0131] Here, let's assume that the outward protrusion length of the spring piece 54 is short (i.e., the height is short). If the central axis of the outer conductor cylinder 52 and the central axis of the outer conductor 80 are significantly misaligned, and the outer conductor 80 is inserted into the multiple spring pieces 54, the outer conductor 80 may come into contact with the longitudinal middle portion of the spring piece 54. In this case, the spring piece 54 may be pushed outward, and the contact portion 57 of the spring piece 54 may not come into contact with the outer conductor 80. In this case, the intended concentric circle structure may not be realized between the outer conductor 80 and the multiple spring pieces 54, and the high-frequency signal transmission characteristics may not be stable.

[0132] As in this embodiment, when the height H of the spring piece 54 relative to the outer conductor cylinder 52 is set to be greater than or equal to the radius r of the outer conductor cylinder 52, the spring piece 54 takes on a detour shape that is significantly separated from the extension line of the outer circumferential surface of the outer conductor cylinder 52. As a result, even when the outer conductors 80 are connected while the central axis of the outer conductor cylinder 52 and the central axis of the outer conductor 80 are significantly misaligned, each of the multiple spring pieces 54 can be significantly deformed. Furthermore, even if the spring piece 54 is significantly deformed, contact between the longitudinal middle portion of the curved part of the spring piece 54 and the outer conductor 80 is avoided, so that the contact portion 57 of the spring piece 54 stably contacts the outer conductor 80. As a result, the desired concentric circle structure is realized between the outer conductor 80 and the multiple spring pieces 54, and the high-frequency signal transmission characteristics are stabilized.

[0133] Furthermore, the curved portion 56 may include a portion 56c that forms an arc shape of 1 / 3 or more of the circumference. The curved portion 56 may also include a portion 56c that forms an arc shape of 2 / 5 or more of the circumference. By including a portion 56c that forms an arc shape of 1 / 3 or more of the circumference of the curved portion 56, the range of angles that the curved portion 56 makes with respect to the central axis of the outer conductor cylinder portion 52 is widened. As each part of the curved portion 56 deforms in the thickness direction or twists, the spring piece 54 becomes more able to follow displacements in multiple directions.

[0134] Furthermore, the radius of curvature rc of the arc-shaped portion 56c of the curved portion 56 may be 1 / 4 or greater of the distance d between the base end 55 and the contact portion 57. The radius of curvature rc may also be 1 / 3 or greater of the distance d. In this case, the radius of curvature of the arc-shaped portion 56c of the curved portion 56 becomes larger, making the curved portion 56 more susceptible to twisting deformation in each part.

[0135] The above distance d may be greater than or equal to the diameter 2r of the outer conductor cylinder portion 52.

[0136] In this embodiment, the curved portion 56 includes extensions 56a and 56b that extend further from both ends of the arc-shaped portion 56c. The extensions 56a and 56b extend away from each other from both ends of the arc-shaped portion 56c toward the base end 55 or the contact portion 57.

[0137] The curved portion 56 has a vertex Pt that is furthest from the central axis of the outer conductor cylinder portion 52. The vertex Pt is located closer to the contact portion 57 than to the base end 55. In this embodiment, the extension 56a from portion 56c toward the base end 55 is longer than the extension 56b toward the contact portion 57, and has a smaller angle with respect to the central axis. As a result, the vertex Pt is located closer to the contact portion 57 than to the base end 55.

[0138] In this case, the portion of the spring piece 54 between the base end 55 and the apex Pt can be used to easily deform the spring piece 54 as a whole. This makes it easier to accommodate large displacements.

[0139] The guide portion 58 extending from the contact portion 57 acts as a guide to draw the outer conductor 80, which is the mating terminal, into the multiple spring pieces 54. The protrusion height Hg of the guide portion 58 relative to the contact portion 57 may be 1 / 3 or more of the diameter 2r of the outer conductor cylinder portion 52. This makes it easier to insert the outer conductor 80 between the multiple spring pieces 54 even if the outer conductor 80 is misaligned.

[0140] <Regarding the coaxial connector on the circuit board side> The board-side coaxial connector 60 will be described in more detail. Figure 10 is an exploded perspective view of the board-side coaxial connector 60. Figure 11 is a plan view showing the board-side coaxial connector 60. Figure 12 is a perspective view showing the inner conductor 62. Figure 13 is a side view showing the inner conductor 62.

[0141] As shown in Figures 2, 3, and 10 to 13, the substrate-side coaxial connector 60 comprises an inner conductor 62, a dielectric 70, and an outer conductor 80.

[0142] The dielectric 70 surrounds the inner conductor 62, which acts as a terminal. The outer conductor 80 surrounds the dielectric 70. The outer conductor 80 surrounding the inner conductor 62 via the dielectric 70 creates a concentric circle structure centered on the inner conductor 62, which may result in improved high-frequency signal transmission characteristics.

[0143] <About the outer conductor> The outer conductor 80 is made of a conductive material such as metal. The outer conductor 80 is formed in a cylindrical shape. An inner locking portion 82 may be formed on the outer conductor 80. The inner locking portion 82 is a part of the outer conductor 50 that has been deformed to protrude inward.

[0144] The outer conductor 80 is soldered to the circuit on the circuit board 21 while it is positioned on the circuit board 21. For example, the base end opening of the outer conductor 80 is soldered to the circuit. This fixes the outer conductor 80 to the circuit board 21 and electrically connects it to the circuit.

[0145] The spring piece 54 of the outer conductor 50 can come into contact with the outer surface of the outer conductor 80.

[0146] <About dielectrics> The dielectric 70 is formed of an insulating material such as resin. The dielectric 70 is formed in a cylindrical shape. The dielectric 70 includes, for example, a main body 72 disposed within the outer conductor 80 and a guide annular portion 74 of the main body 72 located on the side opposite to the circuit board 21.

[0147] The main body 72 is located inside the outer conductor 80 and separates the outer conductor 80 from the inner conductor 62.

[0148] The guide annular portion 74 protrudes outward from the end of the main body 72. The guide annular portion 74 is located on the opening edge of the outer conductor 80 opposite to the circuit board 21. The guide annular portion 74 has a tapered guide surface in which the protrusion dimension from the outer surface of the main body 72 gradually increases toward the outer conductor 80 side.

[0149] The spring piece 54 of the outer conductor 50 is guided by the guide surface of the guide annular portion 74 and contacts the outer surface of the outer conductor 80.

[0150] An inner conductor 62 is positioned in the inner circumferential space of the main body 72. Retaining protrusions 73 are formed on the inner circumference of the main body 72, partially protruding in the circumferential direction. The number of retaining protrusions 73 is formed, for example, according to the number of spring leg pieces 64, which will be described later. In this case, four retaining protrusions 73 are formed. Retaining recesses 73g are formed in the retaining protrusions 73. The retaining recesses 73g can hold the portion of the spring leg piece 64 that is closer to the tip.

[0151] <About the internal conductor> The inner conductor 62 is formed from a conductive material such as metal. The inner conductor 62 is formed, for example, by punching out a metal plate.

[0152] The inner conductor 62 includes a connecting portion 63, a plurality of spring leg pieces 64, and at least one spring connecting piece 68.

[0153] The connecting portion 63 is the part that connects the multiple spring leg pieces 64 to at least one spring connecting piece 68. The connecting portion 63 is the part interposed between the multiple spring leg pieces 64 and at least one spring connecting piece 68.

[0154] Multiple spring leg pieces 64 extend from the connecting portion 63 toward the circuit board 21. At least one spring connecting piece 68 extends from the connecting portion 63 toward the opposite side from the spring leg pieces 64.

[0155] Each of the multiple spring leg pieces 64 includes a fixing portion 64f that is fixed to the circuit board 21. The fixing portion 64f is fixed to the circuit board 21 by soldering, for example. The fixing portion may also be fixed to the circuit board by welding or press-fitting.

[0156] The main conductor 62 is fixed to the circuit board 21 by fixing the fixing portion 64f of each of the multiple spring leg pieces 64 to the circuit board 21.

[0157] The spring connecting piece 68 includes a connecting portion 68b that is connected to the inner conductor 32, which is the mating terminal. In this embodiment, the spring connecting piece 68 includes a straight portion 68a and a connecting portion 68b that is bent outward from the tip of the straight portion 68a. The connecting portion 68b is formed in a shape that protrudes outward from the outer circumference of the inner conductor 62.

[0158] Multiple spring legs 64 are fixed to the circuit board 21, so that the connecting portion 63 is supported at a position away from the circuit board 21. The spring connecting piece 68 is supported so that it faces away from the circuit board 21 from the connecting portion 63. As a result, the spring connecting piece 68 is held in a position and orientation that allows it to be connected to the inner conductor, which is the mating terminal. The distance of the connecting portion 63 from the circuit board 21 should be set appropriately according to the desired high-frequency signal transmission characteristics, etc.

[0159] More specifically, the connecting portion 63 is an annular connecting portion formed in an annular shape. The shape of the connecting portion 63 may be circular, elliptical, or polygonal. In this embodiment, the shape of the connecting portion 63 is circular. In other words, the connecting portion 63 is an annular connecting portion. When the inner conductor 62 is formed by press working of a metal plate, the connecting portion 63 may be formed by rolling up a narrow strip-shaped portion. In this case, the joint of the connecting portion 63 may be slightly open or may be closed by welding or crimping.

[0160] Multiple spring leg pieces 64 are arranged in a ring shape with spacing along the annular direction of the annular connecting portion 63. In this embodiment, multiple spring leg pieces 64 are arranged in a ring shape with spacing.

[0161] Multiple spring leg pieces 64 may be arranged in a ring shape at equal intervals. Here, equal intervals include within the margin of error; for example, if the difference in the spacing between each spring leg piece 64 in the ring direction of the connecting portion 63 is within ±5%, they can be said to be arranged at equal intervals.

[0162] The number of spring legs 64 is arbitrary. The number of spring legs 64 may be four. If there are four spring legs 64, the inner conductor 62 is more easily and stably fixed to the circuit board 21, and the four spring legs 64 are more easily deformed in accordance with the positional error of the inner conductor 62, which is the mating terminal. For example, if there are three spring legs, there are fewer fixing points, and the inner conductor may not be easily and stably fixed to the circuit board. For example, if there are five or more spring legs, the five spring legs 64 may not be easily deformed in accordance with the positional error of the inner conductor 62.

[0163] With four spring legs 64, it is easy to obtain appropriate rotational symmetry to acquire good high-frequency signal transmission characteristics.

[0164] The number of at least one spring connecting piece 68 is arbitrary. The number of at least one spring connecting piece 68 may be multiple. In this embodiment, the number of at least one spring connecting piece 68 is four.

[0165] In the connecting portion 63, the positions from which the spring leg pieces 64 extend and the positions from which the spring connecting pieces 68 extend are arbitrary. In this embodiment, the number of spring leg pieces 64 and spring connecting pieces 68 are the same. The spring leg pieces 64 and spring connecting pieces 68 extend from the same position in the circumferential direction of the connecting portion 63.

[0166] The multiple spring connecting pieces 68 are arranged in an annular pattern with spacing along the annular direction of the connecting portion 63. Similar to the multiple spring leg pieces 64, the multiple spring connecting pieces 68 may also be arranged in an annular pattern with equal spacing along the annular direction of the connecting portion 63.

[0167] The straight portions 68a of the multiple spring connecting pieces 68 extend parallel to each other in a direction away from the circuit board 21. A connecting portion 68b is bent back outwards from the tip of each straight portion 68a. The multiple connecting portions 68b are arranged to form an annular shape on the outer circumference of each of the multiple spring connecting pieces 68.

[0168] Multiple spring connecting pieces 68 are inserted and connected into the cylindrical portion 33 of the inner conductor 32. During this process, the spring connecting pieces 68 undergo elastic deformation, and the multiple connecting portions 68b are elastically pressed against the inner circumferential surface of the cylindrical portion 33. This connects the inner conductor 32 and the inner conductor 62.

[0169] <About the spring leg piece> Let's explain the spring leg piece 64 in more detail.

[0170] The spring leg piece 64 is formed, for example, by press-forming an elongated plate-like portion that extends from one side edge of the connecting portion 63.

[0171] The spring leg piece 64 is configured such that, from the base end to the tip end, it consists of a base end elongated portion 64a, a first bent portion 64b, a second bent portion 64c, a tip end elongated portion 64d, an inward bent portion 64e, and a fixing portion 64f, all connected in this order.

[0172] The base-end elongated portion 64a extends from the connecting portion 63 toward the circuit board 21. For example, the base-end elongated portion 64a may extend from the connecting portion 63 toward the circuit board 21 while inclining inward. This makes it easier to bring the tip of the base-end elongated portion 64a closer to the central axis of the connecting portion 63, and makes it easier to enlarge the first bent portion 64b.

[0173] The second bent portion 64c is located closer to the tip of the spring leg piece 64 than the first bent portion 64b. The first bent portion 64b is the part that bends so as to protrude on the opposite side from the connecting portion 63. The second bent portion 64c is the part that bends so as to protrude towards the connecting portion 63. In other words, the first bent portion 64b and the second bent portion 64c are bent in opposite directions from each other.

[0174] The first bent portion 64b and the second bent portion 64c form an N-shaped detour when the spring leg piece 64 moves from the connecting portion 63 toward the circuit board 21.

[0175] At least one of the first bent portion 64b and the second bent portion 64c may include a curved portion 65c. A curved portion is a part that bends in an arc, excluding, for example, parts that bend at a right angle or an acute angle. The curved portion may include a part that extends and bends in a semicircular arc or more. The curved portion 65c is easily deformed in multiple directions because each part in its direction of extension is easily twisted.

[0176] In this embodiment, the first bent portion 64b near the connecting portion 63 includes a curved portion 65c. The curved portion 65c forms a semicircle or larger. The radius of curvature of the curved portion 65c may be, for example, 1 / 3 or more of the diameter of the outer surface of the connecting portion 63, or 1 / 6 or more of the distance between the circuit board 21 and the connecting portion 63.

[0177] The bottom of the first bent portion 64b that is closest to the coaxial connector 60 on the substrate side may be located at a distance directly above the fixing portion 64f.

[0178] The second bent portion 64c is connected to the end of the first bent portion 64b opposite to the connecting portion 63. The second bent portion 64c includes sharp bends 65s1 and 65s2 which bend more sharply than the curved portion 65c. The sharp bends 65s1 and 65s2 are, for example, portions bent at an angle, such as 90 degrees or an acute angle.

[0179] In this embodiment, the second bent portion 64c includes sharply bent portions 65s1 and 65s2 that are bent at a 90-degree angle. The two sharply bent portions 65s1 and 65s2 are connected to the end of the first bent portion 64b opposite to the connecting portion 63. Therefore, the long tip portion 64d of the second bent portion 64c that is connected to the end of the second bent portion 64c opposite to the connecting portion 63 faces the circuit board 21.

[0180] The elongated tip portion 64d may be formed to be wider than the other parts of the spring leg piece 64. The elongated tip portion 64d may be held in a retaining recess 73g formed in the retaining projection 73 of the dielectric 70. This makes it easier for the portion of the spring leg piece 64 closer to the tip than the second bent portion 64c to be held in a fixed position relative to the dielectric 70.

[0181] An inwardly bent portion 64e extends from the tip of the long end portion 64d toward the central axis X side of the connecting portion 63. A fixed portion 64f extends from the tip of the inwardly bent portion 64e via a stepped portion.

[0182] The fixed portion 64f is the part that is fixed to the circuit board 21, and is, for example, the part that is soldered to the circuit of the circuit board 21.

[0183] <Operation of the internal conductor> The operation of the inner conductor 62 when the inner conductor 32, which serves as the mating terminal, is connected to the inner conductor 62 will be explained.

[0184] When the central axes of the inner conductor 62 and the inner conductor 32 coincide (see inner conductor 32P1 in Figure 13), the inner conductors 62 and 32 move closer to each other, causing the spring connecting piece 68 to enter the cylindrical portion 33 of the inner conductor 32. If necessary, multiple spring connecting pieces 68 elastically deform toward the central axis, and the connecting portion 68b is elastically pressed against the inner circumferential surface of the cylindrical portion 33. This connects the inner conductors 32 and 62.

[0185] If a relative positional error occurs between the inner conductor 62 and the inner conductor 32 due to manufacturing or assembly errors, the central axis of the inner conductor 32 will be misaligned with the central axis of the inner conductor 62 (see inner conductor 32P2 in Figure 13).

[0186] As a result, the connecting portion 68b is displaced according to the amount of displacement, and the spring connecting piece 68 enters the cylindrical portion 33 of the inner conductor 32. The displacement of the connecting portion 68b according to the amount of displacement is achieved by both the deformation of the multiple spring leg pieces 64 and the deformation of at least one spring connecting piece 68.

[0187] Here, the fixing portion 64f at the base end of each of the multiple spring leg pieces 64 is fixed to the circuit board 21, and the tip is connected to the connecting portion 63. Therefore, the multiple spring leg pieces 64 deform while maintaining their base and tip ends in a fixed position. As a result, the relative positions of the multiple spring leg pieces 64 do not change significantly. For example, the relative positions of the multiple spring leg pieces 64 arranged in a ring do not change significantly.

[0188] Furthermore, the base ends of the multiple spring connecting pieces 68 are connected to the connecting portion 63. Compared to the case where the multiple spring connecting pieces 68 are directly fixed to the circuit board 21, the relative positions of the multiple spring connecting pieces 68 are less likely to change significantly. For example, the relative positions of the multiple spring connecting pieces 68 arranged in a ring shape are less likely to change significantly.

[0189] Therefore, the inner conductor 62 as a whole can easily maintain a state in which multiple spring leg pieces 64 and multiple spring connecting pieces 68 are arranged in a ring shape with the connecting portion 63 as the center.

[0190] <Effects, etc.> With the terminals and coaxial connector 60 on the board side configured as described above, when the inner conductor 32, which is the mating terminal, is connected to the spring connecting piece 68, even if the inner conductor 32 is significantly misaligned, both the multiple spring legs 64 and the spring connecting piece 68 deform, absorbing the positional error of the inner conductor 32. Since there is a connecting portion 63 between the multiple spring legs 64 and the spring connecting piece 68, the relative positions of the multiple spring legs 64 are unlikely to change significantly. Therefore, the deformation of the inner conductor 62 as a whole from its initial shape can be kept to a minimum. Thus, the deformation of the inner conductor 62 fixed to the circuit board 21 of the mounting board can be kept to a minimum from its initial shape while absorbing the positional error of the mating inner conductor 62.

[0191] Furthermore, since the connecting portion 63 is an annular connecting portion, and the multiple spring leg pieces 64 are arranged in an annular shape with spacing along the annular direction of the connecting portion 63, it is easy to maintain the state in which the multiple spring leg pieces 64 are arranged in an annular shape.

[0192] Furthermore, having four spring leg pieces 64 allows for stable support of the connecting portion 63 and facilitates the absorption of positional errors in the inner conductor 32 on the mating side.

[0193] Furthermore, since the multiple spring legs 64 support the connecting portion 63 at a position away from the circuit board 21, the multiple spring legs 64 can deform significantly, making it easier to displace the connecting portion 63 significantly. The spring connecting piece 68 extends further from this connecting portion 63, making it easier to accommodate positional errors of the inner conductor 32 on the other side.

[0194] Furthermore, since each of the multiple spring leg pieces 64 includes a first bent portion 64b and a second bent portion 64c, each spring leg piece 64 is easily subjected to significant elastic deformation. Therefore, it is easier to accommodate positional errors in the mating inner conductor 32.

[0195] Furthermore, since at least one of the first bent portion 64b and the second bent portion 64c includes a curved portion 65c, the spring leg piece 64 can be deformed in various directions. Therefore, it is easier to accommodate positional errors of the inner conductor 32 on the mating side.

[0196] Furthermore, the first bent portion 64b, which is close to the connecting portion 63, includes a curved portion 65c, and the second bent portion 64c includes sharply bent portions 65s1 and 65s2. Here, it is considered that the connecting portion 63 can be deformed more easily than the sharply bent portions 65s1 and 65s2. For this reason, when responding to positional errors of the opposing dielectric 70, the spring leg piece 64 can be deformed mainly on the first bent portion 64b side. As a result, the fixing portion 64f at the tip of the spring leg piece 64 is less likely to be displaced, and the fixed state between the fixing portion 64f and the circuit board 21 is easily maintained.

[0197] Furthermore, by holding the long tip portion 64d with the retaining projection 73 of the dielectric 70, the fixed portion 64f becomes less prone to displacement, and the fixed state between the fixed portion 64f and the circuit board 21 is more easily maintained.

[0198] Furthermore, if there are multiple spring connecting pieces 68, the relative positions of the multiple spring connecting pieces 68 are maintained by the connecting portion 63 and are less likely to change significantly. Therefore, deformation of the inner conductor 62 as a whole from its initial shape is further suppressed.

[0199] Furthermore, since the multiple spring connecting pieces 68 are arranged in a ring shape with spacing along the annular direction of the annular connecting portion 63, it is easy to maintain the annular arrangement of the spring connecting pieces 68.

[0200] By configuring the coaxial connector 60 to include the inner conductor 62, dielectric 70, and outer conductor 80, the inner conductor 62 can accommodate positional errors of the mating inner conductor 32. Even if the inner conductor 62 deforms in response to positional errors of the mating inner conductor 62, the deformation of the inner conductor 62 from its initial shape is small. Therefore, fluctuations in the relative positional relationship between the inner conductor 32 and the outer conductor 80 are reduced, and the high-frequency signal transmission characteristics become stable.

[0201] In particular, in the inner conductor 32, it is easy to maintain a state in which multiple spring leg pieces 64 or multiple spring connecting pieces 68 are arranged in a ring shape, which makes it easier to maintain the concentric structure of the board-side coaxial connector 60, and thus the high-frequency signal transmission characteristics tend to be stable and good.

[0202] [Differentiation] As described above, the structure of the terminal described as an inner conductor can also be used as a terminal for other purposes. For example, the structure of the terminal described above may be used as an outer conductor.

[0203] Furthermore, the configurations described in the above embodiments and each of the modified examples can be combined as appropriate, as long as they do not contradict each other. [Explanation of symbols]

[0204] 10 equipment 12 cases 13. Case 1 14. Case 2 15 Bottom 16 Holding cylinder part 17 Retaining partition 17h holding hole 18a Locking protrusion 20 Electrical components 21 Circuit board 22 Imaging elements 30 relay coaxial connectors 32, 62 Inner conductor 33 Cylinder part 33p Rotation stopper projection 34. Middle section 34p Retaining projection 35 Rod-shaped part 40, 70 dielectric 40g positioning indentation 40h through hole 40h1 Thick inner diameter part 40h2 Intermediate inner diameter part 40h2g dent 40h3 Narrow inner diameter part 50, 80 Outer conductor 52 Outer conductor tube section 52B Tube Body 52E1 First edge 52E2 2nd edge 52EC2 recess 52EP1 protrusion 52EP1a Head 52p1 Inner position regulating protrusion 52p2 Inner locking part 52p2e Inner hypotenuse 52p3 Outer locking part 52p3e Outer hypotenuse 52p4 Outer position regulating protrusion 53 Extension piece 54 spring pieces 55 Proximal end 56 Curved section 56a Extension 56b Extension 56c part 57 Contact area 58 Guide section 60 Coaxial connector on the circuit board side 63 Connecting part 64 Spring Leg Pieces 64a Proximal long part 64b First bend return section 64c Second bend section 64d Long distal part 64e Inner bend 64f Fixed part 65c curved section 65s1, 65s2 sharp bend section 68 Spring connector 68a Straight section 68b Connection section 72 Main unit 73 Holding protrusion 73g holding recess 74 Guide annular section 82 Inner locking part H Height Hg protrusion height Pt vertex X center axis d distance r radius rc radius of curvature

Claims

1. A terminal that is fixed to the mounting board, The connecting part, Multiple spring legs extending from the connecting portion toward the mounting substrate, At least one spring connecting piece extending from the connecting portion to the side opposite to the spring leg piece, Equipped with, Each of the plurality of spring leg pieces includes a fixing portion that is fixed to the mounting substrate, The spring connecting piece is a terminal including a connecting portion that is connected to the mating terminal.

2. A terminal according to claim 1, The aforementioned connecting portion is an annular connecting portion, The plurality of spring legs are terminals arranged in a ring shape with spacing along the ring direction of the ring-shaped connecting portion.

3. A terminal according to claim 1 or claim 2, The number of the aforementioned spring legs is four, terminal.

4. A terminal according to claim 1 or claim 2, The plurality of spring legs are terminals that support the connecting portion at a position away from the mounting substrate.

5. A terminal according to claim 1 or claim 2, Each of the plurality of spring leg pieces includes a first bent portion and a second bent portion located closer to the tip than the first bent portion. The first bent portion is a point that bends so as to be convex on the opposite side from the connecting portion. The second bent portion is a terminal, which is a point that bends so as to protrude toward the connecting portion.

6. A terminal according to claim 5, A terminal in which at least one of the first bent portion and the second bent portion includes a curved portion.

7. A terminal according to claim 6, The first bent portion includes the curved portion, The second bent portion includes a sharply bent portion that bends more abruptly than the curved portion, and is a terminal.

8. A terminal according to claim 1 or claim 2, A terminal in which the number of the aforementioned at least one spring connecting piece is multiple.

9. A terminal according to claim 2 or claim 3, The number of the aforementioned at least one spring connecting piece is multiple, The plurality of spring connecting pieces are terminals arranged in a ring shape with intervals along the ring direction of the ring-shaped connecting portion.

10. A terminal according to claim 1 or claim 2, A dielectric material surrounding the aforementioned terminal, An outer conductor surrounding the dielectric, A coaxial connector equipped with the following features.

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