Coaxial connector

Abstract

The purpose of the present invention is to suppress erroneous assembly of an inner conductor with respect to an insulator. The coaxial connector is provided with an inner conductor, an insulator surrounding the periphery of the inner conductor, and a cylindrical outer conductor surrounding the periphery of the insulator. The inner conductor is in a rod shape including a first end and a second end, the inner conductor includes a first press-fit portion located near the first end and a second press-fit portion located near the second end in an extension direction of the inner conductor, the first press-fit portion and the second press-fit portion are located at equidistant positions from a center of the inner conductor in the extension direction, and the insulator has an insertion hole into which the inner conductor is inserted. In a state in which the first end and the second end protrude from the insulator, one of the first press-fitting part and the second press-fitting part is inserted into the insertion hole, and the inner conductor is held by the insulator.

Description

Technical Field

[0001] The present invention relates to a coaxial connector. Background Art

[0002] Patent Document 1 discloses a coaxial connector including an outer conductor, a center conductor, and an insulating member that supports the center conductor in a state of insulating the center conductor from the outer conductor. Patent Document 1 discloses that a flange-shaped locking portion for locking the center conductor to the insulating member is formed on the center conductor. Prior art literature Patent Literature

[0003] Patent Document 1: Japanese Patent Application Publication No. 2018-26238 Summary of the invention Problems to be solved by the invention

[0004] According to the technology disclosed in Patent Document 1, the end portion of the central conductor on one side where the flange-shaped locking portion is formed is inserted into the insulating member. If the other end portion of the central conductor is inserted into the insulating member, an incorrect assembly state is obtained.

[0005] It is required to suppress erroneous assembly in which the central conductor is assembled to the insulating member in an incorrect state.

[0006] Therefore, an object of the present invention is to suppress erroneous assembly of an inner conductor with respect to an insulator. Solutions to Solve Problems

[0007] The coaxial connector of the present invention comprises an inner conductor, an insulator surrounding the inner conductor, and a cylindrical outer conductor surrounding the insulator, wherein the inner conductor is in the shape of a rod including a first end and a second end, the inner conductor comprises a first press-in portion located near the first end in the extension direction of the inner conductor and a second press-in portion located near the second end, the first press-in portion and the second press-in portion being located at positions equidistant from the center of the extension direction of the inner conductor, the insulator having an insertion hole, the inner conductor being inserted into the insertion hole, and one of the first press-in portion and the second press-in portion being pressed into the insertion hole when the first end and the second end are extended from the insulator, and the inner conductor is held by the insulator. Effects of the Invention

[0008] According to the present invention, it is possible to suppress erroneous assembly of the inner conductor with respect to the insulator. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a perspective view showing a device including the coaxial connector according to the embodiment. Figure 2 yes Figure 1Sectional view along line II-II. Figure 3 is a perspective view showing a coaxial connector. Figure 4 is a rear view showing the coaxial connector. Figure 5 is an exploded perspective view showing a coaxial connector. Figure 6 yes Figure 3 VI-VI line cross-sectional view. DETAILED DESCRIPTION

[0010] [Description of Embodiments of the Invention] First, embodiments of the present invention will be described by way of examples.

[0011] The coaxial connector of the present invention is as follows.

[0012] (1) A coaxial connector comprising an inner conductor, an insulator surrounding the inner conductor, and a cylindrical outer conductor surrounding the insulator, wherein the inner conductor is in the shape of a rod having a first end and a second end, the inner conductor comprising a first press-in portion located near the first end in an extending direction of the inner conductor and a second press-in portion located near the second end, the first press-in portion and the second press-in portion being located at positions equidistant from a center of the inner conductor in the extending direction, the insulator having an insertion hole, the inner conductor being inserted into the insertion hole, and one of the first press-in portion and the second press-in portion being pressed into the insertion hole when the first end and the second end are extended from the insulator, so that the inner conductor is held by the insulator.

[0013] According to the coaxial connector, no matter which of the first press-in portion and the second press-in portion is pressed into the insertion hole, the inner conductor is inserted into the insertion hole and is held by the insulator. In addition, the first press-in portion and the second press-in portion are located at positions equidistant from the center of the inner conductor in the extension direction. Therefore, the positions of the first end and the second end relative to the insulator in the state where the first press-in portion is pressed into the insertion hole and the positions of the first end and the second end relative to the insulator in the state where the second press-in portion is pressed into the insertion hole can be made consistent. In other words, no matter which of the first press-in portion and the second press-in portion is pressed into the insertion hole, the assembly state of the inner conductor relative to the insulator can be made the same. Thus, it is possible to suppress the incorrect assembly of the inner conductor relative to the insulator.

[0014] (2) In the coaxial connector of (1), a portion of the inner conductor from the center in the extending direction to the first end and a portion of the inner conductor from the center in the extending direction to the second end may have the same shape.

[0015] Thus, the assembly state of the inner conductor with respect to the insulator can be made more uniform regardless of the state in which the first press-in portion or the second press-in portion is pressed into the insertion hole.

[0016] (3) In the coaxial connector of (1) or (2), the first press-in portion may include a first press-in protrusion, the first press-in protrusion having a first inclined surface and a first anti-slip surface, the first inclined surface gradually extending from the first end side of the inner conductor toward the central side in the extension direction of the inner conductor toward the outer peripheral side, and the first anti-slip surface extending from an edge of the first inclined surface on the central side in the extension direction of the inner conductor toward the center of the inner conductor, and the second press-in portion may include a second press-in protrusion, the second press-in protrusion having a second inclined surface and a second anti-slip surface, the second inclined surface gradually extending from the second end side of the inner conductor toward the central side in the extension direction of the inner conductor toward the outer peripheral side, and the second anti-slip surface extending from an edge of the second inclined surface on the central side in the extension direction of the inner conductor toward the center of the inner conductor.

[0017] In this case, by making the first inclined surface or the second inclined surface contact the opening edge and the inner periphery of the insertion hole, the first press-in portion or the second press-in portion can be easily inserted into the insertion hole. When the first press-in portion or the second press-in portion is inserted into the insertion hole, the first anti-detachment surface or the second anti-detachment surface is hooked on the inner periphery of the insertion hole, and the first press-in portion or the second press-in portion is not easy to fall off from the insertion hole. Thus, the inner conductor is firmly held on the insulator.

[0018] (4) In the coaxial connector of (3), the first bevel and the second bevel may have the same inclination angle relative to the center axis of the inner conductor, and the first anti-detachment surface and the second anti-detachment surface may be opposite to each other and each may have the same inclination angle relative to the center axis of the inner conductor.

[0019] Thus, the first and second press-fit portions have the same shape, and the inner conductor can be assembled to the insulator in a more uniform state regardless of whether the first or second press-fit portion is pressed into the insertion hole.

[0020] (5) In the coaxial connector of (3) or (4), the outer conductor may include a small diameter portion, a large diameter portion larger than the small diameter portion, and a gradual change portion whose diameter gradually increases between the small diameter portion and the large diameter portion, and when one of the first press-in protrusion and the second press-in protrusion is pressed into the insertion hole, the other of the first press-in protrusion and the second press-in protrusion is located at a position overlapping the gradual change portion in the axial direction of the outer conductor.

[0021] Thus, if the other of the first pressing protrusion and the second pressing protrusion is located at a position overlapping the gradient portion, the distance between the outer conductor and the inner conductor can be kept as constant as possible in the gradient portion. Thus, the impedance can be easily adjusted in the gradient portion of the outer conductor.

[0022] (6) In the coaxial connector of (5), when one of the first press-in protrusion and the second press-in protrusion is pressed into the insertion hole, the other of the first press-in protrusion and the second press-in protrusion overlaps more than 80% of the gradient portion in the axial direction of the outer conductor.

[0023] In this case, the distance between the outer conductor and the inner conductor can be kept as constant as possible in most of the gradient portion in the direction along the central axis. This makes it easy to adjust the impedance in the gradient portion of the outer conductor.

[0024] (7) In the coaxial connector of (5) or (6), the inclination of the first inclined surface and the second inclined surface relative to the central axis of the inner conductor may be within ±5 degrees compared to the inclination of the gradient portion relative to the central axis of the outer conductor. Thus, the distance between the outer conductor and the inner conductor can be kept more constant in the gradient portion.

[0025] (8) In the coaxial connector of any one of (3) to (7), the first slope and the second slope may each include a portion having an arc shape centered on the central axis of the outer conductor.

[0026] In this case, the distance between the outer conductor and the inner conductor can be kept more constant in the circumferential direction around the central axis of the outer conductor, thereby facilitating impedance adjustment.

[0027] (9) In any one of the coaxial connectors of (3) to (8), the first press-in portion may include a plurality of the first press-in protrusions, and the second press-in portion may include a plurality of the second press-in protrusions, wherein in the first press-in portion, the plurality of first press-in protrusions are spaced apart and located around the center axis of the inner conductor, and in the second press-in portion, the plurality of second press-in protrusions are spaced apart and located around the center axis of the inner conductor.

[0028] In this case, compared with a case where the protrusion for press-in projects over the entire circumference of the press-in portion, the first press-in portion or the second press-in portion can be press-in easily.

[0029] (10) In the coaxial connector of (9), it may be that in the first press-in portion, the plurality of first press-in protrusions are located at equal intervals around the center axis of the inner conductor, and in the second press-in portion, the plurality of second press-in protrusions are located at equal intervals around the center axis of the inner conductor.

[0030] In this case, it is easy to give rotational symmetry to the physical property that affects the impedance around the inner conductor. As a result, the impedance is stabilized around the inner conductor.

[0031] [Details of Embodiments of the Invention] Specific examples of the coaxial connector of the present invention are described below with reference to the drawings. The present invention is not limited to these examples, but is shown by the claims, and is intended to include all modifications within the meaning and scope equivalent to the claims.

[0032] [Implementation Method] Hereinafter, a coaxial connector according to an embodiment will be described. Figure 1 1 is a perspective view showing a device 10 including a coaxial connector 30 . Figure 2 yes Figure 1 Sectional view along line II-II.

[0033] <About the overall structure of the equipment> The device 10 is, for example, a camera device. The camera device is, for example, a vehicle-mounted device. The device 10 may not be a camera device.

[0034] The device 10 includes a housing 12, an electrical component 20, and a coaxial connector 30. The electrical component 20 is stored in the housing 12. The coaxial connector 30 is a coaxial connector for connecting the electrical component 20 to an external electrical component. For example, the coaxial connector 30 is a coaxial connector to which a cable connected to the external electrical component is connected. The cable connected to the coaxial connector 30 is, for example, a coaxial cable.

[0035] The housing 12 includes a first housing 13 and a second housing 14. The first housing 13 and the second housing 14 are formed of, for example, resin. The first housing 13 and the second housing 14 are combined to form a rectangular box-shaped housing 12 that accommodates the electrical components 20. In the case where the device 10 is a camera device, it is assumed that the first housing 13 has a lens or a window for photographing, and the second housing 14 has a coaxial connector 30.

[0036] The electrical component 20 is, for example, a mounting substrate on which electronic components are mounted. In the case where the device 10 is a camera device, it is assumed that the electrical component 20 is a circuit substrate 21 and an image pickup element 22 mounted on the circuit substrate 21. The image pickup element 22 is opposed to a lens or a window for imaging of the first housing 13, and the lens or the window is rotated to capture an image of the outside scene. In the following, the first housing 13 side facing the image pickup element 22 is sometimes referred to as the front side, and the second housing 14 side opposite thereto is referred to as the rear side.

[0037] In the present embodiment, the electrical component 20 includes a substrate-side connector 24, and the substrate-side connector 24 is located on the surface of the circuit substrate 21 on the side opposite to the imaging element 22. The substrate-side connector 24 includes, for example, a substrate-side inner conductor 25, a substrate-side insulator 26, and a substrate-side outer conductor 27. The substrate-side insulator 26 surrounds the substrate-side inner conductor 25. A dielectric body can be regarded as a type of insulator, and the substrate-side insulator 26 can also be a dielectric body. The substrate-side outer conductor 27 surrounds the substrate-side insulator 26. The substrate-side connector 24 protrudes from the circuit substrate 21 toward the coaxial connector 30.

[0038] The relay connector 90 is connected to the substrate-side connector 24. The relay connector 90 includes, for example, a movable-side inner conductor 91, a movable-side insulator 92, and a movable-side outer conductor 93. The movable-side insulator 92 surrounds the movable-side inner conductor 91. A dielectric body can be regarded as a kind of insulator, and the movable-side insulator 92 may also be a dielectric body. The movable-side outer conductor 93 surrounds the movable-side insulator 92. In a state where the movable-side inner conductor 91 is inserted and connected to the substrate-side inner conductor 25, and the substrate-side outer conductor 27 is inserted and connected to the movable-side outer conductor 93, the relay connector 90 is connected to the substrate-side connector 24. The relay connector 90 further protrudes from the substrate-side connector 24 toward the coaxial connector 30. The relay connector 90 performs relay connection between the substrate-side connector 24 and the coaxial connector 30. The relay connector 90 can be connected to the substrate-side connector 24 and the coaxial connector 30 in a changeable posture.

[0039] The coaxial connector 30 is provided on the side of the second housing 14, that is, the rear side of the housing 12. More specifically, a retaining cylinder 16 is provided protrudingly on the bottom 15 of the housing 12. The retaining cylinder 16 is a cylinder, and protrudes outward from the central part of the bottom 15. The inner opening of the retaining cylinder 16 opens in the second housing 14, and the outer opening of the retaining cylinder 16 opens outside the second housing 14. A retaining partition 17 is formed in the middle part of the retaining cylinder 16 in the axial direction. In the present embodiment, the retaining partition 17 is formed in the middle part of the retaining cylinder 16 in the axial direction and close to the inner opening. The retaining partition 17 separates the space on the inner opening side and the space on the outer opening side in the retaining cylinder 16. A retaining hole 17h is formed in the retaining partition 17, and the retaining coaxial connector 30 is inserted into the retaining hole 17h. The retaining partition 17 is continuous with the inner surface of the bottom 15 in a coplanar shape.

[0040] In the present embodiment, the locking projection 18a for holding the cable connector mounted on the end of the cable is formed on the outer peripheral portion of the holding cylinder 16. The locking projection 18a is not necessarily formed.

[0041] In the housing 12, the relay connector 90 is connected to the coaxial connector 30. When an external cable is connected to the coaxial connector 30, an external electric component as a connection partner of the cable is electrically connected to the electric component 20 in the housing 12.

[0042] <Coaxial Connector> The coaxial connector 30 will be described in more detail. Figure 3 is a perspective view showing the coaxial connector 30 . Figure 4 3 is a rear view showing the coaxial connector 30 . Figure 5 1 is an exploded perspective view showing the coaxial connector 30 . Figure 6 yes Figure 3 VI-VI line cross-sectional view.

[0043] like Figures 1 to 6 As shown, the coaxial connector 30 includes an inner conductor 32 , an insulator 40 , and an outer conductor 50 .

[0044] The inner conductor 32 is formed into a long and thin rod shape and is formed of a conductive material such as metal. The insulator 40 is formed of an insulator such as resin and surrounds the inner conductor 32. In the present embodiment, the insulator 40 is a dielectric body. The outer conductor 50 is formed of a conductive material such as metal. The outer conductor 50 is formed into a cylindrical shape surrounding the insulator 40. More specifically, the outer conductor 50 is formed into a cylindrical shape. The central axis X of the inner conductor 32, the central axis X of the insulator 40, and the central axis X of the outer conductor 50 are located at the same position.

[0045] The structure of each part will be described in more detail.

[0046] The inner conductor 32 is in the shape of a rod including a first end 34a and a second end 34b. The first end 34a faces the inside of the housing 12, and the second end 34b faces the outside of the housing 12. In the present embodiment, the inner conductor 32 is in the shape of a straight rod, but may be in the shape of an L-shaped rod.

[0047] In the present embodiment, the inner conductor 32 includes an intermediate waist portion 39 , a first connection end portion 33 a , and a second connection end portion 33 b .

[0048] The middle waist portion 39 is in the shape of a round bar except for the first press-in portion 35a and the second press-in portion 35b. The middle waist portion 39 is mainly a portion embedded in the insulator 40 and held by the insulator 40. The first connection end portion 33a and the second connection end portion 33b are in the shape of a round bar. The first connection end portion 33a is a portion for connecting to the relay connector 90 in the housing 12, and the second connection end portion 33b is a portion for connecting to the cable outside the housing 12.

[0049] The first connection end portion 33a extends from one end of the middle waist portion 39, and the second connection end portion 33b extends from the other end of the middle waist portion 39. The outer end of the first connection end portion 33a is the first end 34a, and the outer end of the second connection end portion 33b is the second end 34b. The first end 34a and the second end 34b are rounded, but this is not necessary. The first connection end portion 33a and the second connection end portion 33b are the same length and the same thickness. In other words, the first connection end portion 33a and the second connection end portion 33b are the same shape. In the present embodiment, the inner conductor 32 is a straight rod, but it can also be a rod extending in an L shape.

[0050] The middle waist portion 39 is thicker than the first connection end portion 33a and the second connection end portion 33b. Therefore, an annular step corresponding to the difference in thickness is located between the middle waist portion 39 and the first connection end portion 33a, and between the middle waist portion 39 and the second connection end portion 33b. The middle waist portion 39 is not necessarily thicker than the first connection end portion 33a and the second connection end portion 33b, and the middle waist portion, the first connection end portion, and the second connection end portion may be of the same thickness.

[0051] The inner conductor 32 includes a first press-in portion 35a and a second press-in portion 35b. The first press-in portion 35a and the second press-in portion 35b are portions that are pressed into the insulator 40 by pressure. In the extending direction of the inner conductor 32, the first press-in portion 35a is located near the first end 34a closer to the first end 34a than the second end 34b, and the second press-in portion 35b is located near the second end 34b closer to the second end 34b than the first end 34a.

[0052] The first press-fit portion 35a and the second press-fit portion 35b are located at equal distances from the center of the inner conductor 32 in the extension direction. In other words, the distance between the first press-fit portion 35a and the first end 34a is the same as the distance between the second press-fit portion 35b and the second end 34b. In addition, here, equal distances or same distances include the sameness within the error range (for example, the sameness within the range of ±1 mm).

[0053] In the present embodiment, the first press-in portion 35a is located at the end portion on the first end 34a side of the intermediate waist portion 39, and the second press-in portion 35b is located at the end portion on the second end 34b side of the intermediate waist portion 39. As long as the base ends of the first connection end portion 33a and the second connection end portion 33b are pressed into the insulator 40, the first press-in portion and the second press-in portion may be formed on the first connection end portion 33a and the second connection end portion 33b.

[0054] The first press-fit portion 35a includes a first press-fit body portion 35Ba and a first press-fit projection 36a.

[0055] The first pressing body portion 35Ba is formed in a regular polygonal prism shape, in this case a regular hexagonal prism shape. The first pressing body portion may be in a cylindrical shape, for example, a round rod-shaped portion continuous from the middle portion of the middle waist portion 39 .

[0056] The first press-fit protrusion 36a protrudes from the outer peripheral portion of the first press-fit main body portion 35Ba. The first press-fit protrusion 36a includes a first inclined surface 36a1 and a first anti-slip surface 36a2.

[0057] The first inclined surface 36a1 extends gradually toward the outer peripheral side from the first end 34a side of the inner conductor 32 toward the center side in the extending direction of the inner conductor 32. Therefore, the first press-fit protrusion 36a is formed in the first press-fit body portion 35Ba in a shape in which the protrusion height gradually increases from the first end 34a side of the inner conductor 32 toward the center side in the extending direction of the inner conductor 32.

[0058] In this embodiment, the first inclined surface 36a1 is in an arc shape centered on the central axis X of the outer conductor 50 (see Figure 4 That is, when the first press-fit protrusion 36a in the inner conductor 32 is cut along a plane perpendicular to the central axis X of the inner conductor 32, the first inclined surface 36a1 is observed to be in an arc shape centered on the central axis X of the outer conductor 50. The first inclined surface 36a1 does not necessarily have to be in the above-mentioned arc shape. The first inclined surface may also be a plane.

[0059] The first anti-slip surface 36a2 extends from the edge of the first inclined surface 36a1 on the central side in the extension direction of the inner conductor 32 toward the center of the inner conductor 32. For example, the first anti-slip surface 36a2 may be a surface orthogonal to the central axis X of the inner conductor 32. Therefore, the portion of the first press-fit protrusion 36a on the central side in the extension direction of the inner conductor 32 has the first anti-slip surface 36a2 facing the central side in the extension direction of the inner conductor 32.

[0060] In the present embodiment, the first press-in portion 35a includes a plurality of first press-in protrusions 36a. In the first press-in portion 35a, the plurality of first press-in protrusions 36a are located at intervals around the central axis X of the inner conductor 32. Here, the plurality of first press-in protrusions 36a are located at equal intervals around the central axis X of the inner conductor 32. When viewed along the central axis X, the plurality of first press-in protrusions 36a are formed in a manner of radially protruding around the central axis X. More specifically, the first press-in main body 35Ba is in the shape of a hexagonal prism, and the first press-in protrusions 36a are provided on every other side surface of the six side surfaces thereof. Therefore, the first press-in portion 35a includes three first press-in protrusions 36a provided at intervals of 120 degrees around the central axis X of the inner conductor 32.

[0061] In addition, the number of the first press-in protrusions 36a is arbitrary. For example, the first press-in portion may have one first press-in protrusion. In this case, one first press-in protrusion may be an annular protrusion provided on the entire circumference of the first press-in portion, or may be a protrusion provided on a portion of the circumference of the first press-in portion. In addition, a plurality of first press-in protrusions may be located on the central axis X of the inner conductor at different intervals.

[0062] Similar to the first press-in portion 35a, the second press-in portion 35b includes a second press-in main body portion 35Bb corresponding to the first press-in main body portion 35Ba and a second press-in protrusion 36b corresponding to the first press-in protrusion 36a. Similar to the first press-in protrusion 36a, the second press-in protrusion 36b includes a second inclined surface 36b1 corresponding to the first inclined surface 36a1 and a second anti-detachment surface 36b2 corresponding to the first anti-detachment surface 36a2. Therefore, the first inclined surface 36a1 and the second inclined surface 36b1 have the same inclination angle with respect to the central axis X of the inner conductor 32. In addition, the first anti-detachment surface 36a2 and the second anti-detachment surface 36b2 are opposed to each other, and each has the same inclination angle with respect to the central axis X of the inner conductor 32.

[0063] In the present embodiment, the portion of the inner conductor 32 from the center of the extension direction to the first end 34a and the portion of the inner conductor 32 from the center of the extension direction to the second end 34b are of the same shape. More specifically, the first connection end portion 33a and the second connection end portion 33b are of the same shape, and the first press-in portion 35a and the second press-in portion 35b are of the same shape. The first connection end portion 33a and the second connection end portion 33b are of the same shape, and the first press-in portion 35a and the second press-in portion 35b do not necessarily have to be of the same shape. The first connection end portion 33a and the second connection end portion 33b only need to be of a similar shape to the extent that they can be connected to the connector inside and outside the housing 12. In addition, the first press-in portion 35a and the second press-in portion 35b may also be of a similar shape to the extent that they can be prevented from falling out in the insertion hole 44.

[0064] Here, a plane passing through the center of the extension direction of the inner conductor 32 and perpendicular to the axial direction of the inner conductor 32 is taken as a symmetry plane, and one end and the other end of the inner conductor 32 have plane symmetry. One end and the other end of the inner conductor 32 do not necessarily have plane symmetry based on the symmetry plane. For example, a shape in which one end and the other end of the inner conductor 32 of the present embodiment are rotated around the central axis X of the inner conductor 32 may also be the inner conductor. For example, the position of the second press-fit protrusion 36b in the second press-fit portion 35b may be offset by 60 degrees around the central axis X of the inner conductor 32 relative to the position of the first press-fit protrusion 36a in the first press-fit portion 35a.

[0065] The insulator 40 is, for example, a molded resin component. The insulator 40 is formed in a cylindrical shape. The length of the insulator 40 is shorter than the length of the inner conductor 32. An insertion hole 44 is formed at the center of the insulator 40 along its extension direction. An opening 44a at one end side of the insertion hole 44 is formed to have a smaller diameter than a hole body 44b in the middle of the extension direction of the insertion hole 44. The opening 44a is set to a size that allows the first connection end 33a (or the second connection end 33b) to be inserted but cannot be inserted into the middle waist 39. For example, the diameter of the opening 44a is set to be the same as or larger than the diameter of the first connection end 33a (or the second connection end 33b), and is set to be smaller than the diameter of the middle waist 39. The hole body 44b of the insertion hole 44 is set to a size that allows the middle waist 39 to be inserted. For example, the diameter of the hole body 44b is set to be the same as the diameter of the middle waist 39.

[0066] Therefore, when the inner conductor 32 is inserted into the insertion hole 44 from the other end side opening of the insertion hole 44, the first connection end portion 33a (or the second connection end portion 33b) is inserted into the opening portion 44a through the hole body 44b, and the intermediate waist portion 39 is inserted into the hole body 44b. In a state where the annular step between the first connection end portion 33a (or the second connection end portion 33b) and the intermediate waist portion 39 contacts the opening portion 44a from the inside, the inner conductor 32 is positioned relative to the insertion hole 44 in the insertion direction. This positioned state is the finished product state of the coaxial connector 30.

[0067] In this state, the first connection end portion 33a including the first end 34a (or the second connection end portion 33b including the second end 34b) is in a state of extending from one end of the insulator 40. In addition, the second connection end portion 33b including the second end 34b (or the first connection end portion 33a including the first end 34a) is in a state of extending from the other end of the insulator 40. Furthermore, the end portion of the second connection end portion 33b (or the first connection end portion 33a) side in the intermediate waist portion 39 does not enter the insertion hole 44, and is in a state of extending from the other end of the insulator 40.

[0068] Furthermore, an opening 44 c at the other end of the insertion hole 44 is formed in a tapered shape that gradually expands toward the outside. The insertion end of the inner conductor 32 is guided into the insertion hole 44 by the opening 44 c.

[0069] As described above, when the inner conductor 32 is inserted into the insertion hole 44 and held by the insulator 40, one of the first press-in portion 35a and the second press-in portion 35b is pressed into the insertion hole 44, and the inner conductor 32 is held by the insulator 40. In addition, in this state, the other of the first press-in portion 35a and the second press-in portion 35b is extended from the insertion hole 44. For example, it is considered that the inner conductor 32 is inserted into the insertion hole 44 with the first end 34a as the top. The first press-in protrusion 36a also protrudes outward from the middle waist portion 39. Therefore, when the inner conductor 32 is inserted into the insertion hole 44, the first press-in protrusion 36a interferes with the inner peripheral portion of the insertion hole 44. Therefore, the inner conductor 32 is pressed into the insertion hole 44 while the inner peripheral portion of the insertion hole 44 is deformed by the first press-in protrusion 36a. At this time, the first inclined surface 36a1 contacts the opening and inner periphery of the insertion hole 44, so the first press-in projection 36a can smoothly move forward in the insertion hole 44. As described above, when the inner conductor 32 is completely inserted into the insulator 40, the inner periphery of the insertion hole 44 wants to restore its original shape, so the first anti-slip surface 36a2 of the first press-in projection 36a is hooked on the inner periphery of the insertion hole 44 to prevent it from slipping out. Thus, the inner conductor 32 is prevented from slipping out of the insertion hole 44. In this state, since the second press-in portion 35b is located outside the insulator 40, the second press-in portion 35b is unlikely to hinder the insertion operation of the inner conductor 32.

[0070] As described above, both ends of the inner conductor 32 are formed in the same shape. Therefore, when the inner conductor 32 is inserted into the insertion hole 44 with the second end 34b as the top end, the positional relationship between the first connection end 33a and the second connection end 33b is reversed, and the positional relationship between the first press-fit portion 35a and the second press-fit portion 35b is reversed, but a combined component with the same shape as described above can be obtained.

[0071] The outer conductor 50 is formed of metal, etc. For example, the outer conductor 50 may be formed by deep drawing a metal material, by pressing a metal plate, by die molding, or by cutting.

[0072] The outer conductor 50 is cylindrical. The length of the outer conductor 50 is greater than the length of the insulator 40. The insulator 40 is located in the middle of the extension direction of the outer conductor 50. The first connection end portion 33a and the second connection end portion 33b protruding from both ends of the outer conductor 50 may also be located in the center of both ends of the outer conductor 50. The first connection end portion 33a and the second connection end portion 33b may also protrude outward from the outer conductor 50.

[0073] In this embodiment, the outer conductor 50 includes a small diameter portion 52, a large diameter portion 56 larger than the small diameter portion 52, and a gradual change portion 54 whose diameter gradually increases between the small diameter portion 52 and the large diameter portion 56. The large diameter portion 56 is a portion facing the inside of the housing 12, and the small diameter portion 52 is a portion facing the outside of the housing 12. The large diameter portion 56 has a diameter corresponding to the thickness of the relay connector 90 as the connecting partner in the housing 12, and the small diameter portion 52 has a diameter corresponding to the thickness of the connector at the end of the cable outside the housing 12. The large diameter portion 56 in the outer conductor 50 is pressed into the holding hole 17h and is held by it. Depending on the thickness of the connecting partner connector, the relationship of thickness at both ends of the outer conductor may be opposite to the above, or may be a cylindrical shape with the same diameter. The gradual change portion 54 is formed into a tapered shape whose diameter gradually increases from the small diameter portion 52 toward the large diameter portion 56.

[0074] The thickness of the insulator 40 is set to be able to be inserted into the large diameter portion 56. For example, the outer diameter of the insulator 40 is the same as the inner diameter of the large diameter portion 56, and is larger than the inner diameter of the small diameter portion 52. The insulator 40 is pressed into the outer conductor 50 from the opening on the large diameter portion 56 side. The insulator 40 is located next to the gradual change portion 54 in the large diameter portion 56. For example, the end surface of the insulator 40 facing the small diameter portion 52 side is located at the boundary between the gradual change portion 54 and the large diameter portion 56.

[0075] Thus, when one of the first press-in portion 35a and the second press-in portion 35b is inserted into the insertion hole 44, the other of the first press-in portion 35a and the second press-in portion 35b is located at a position overlapping with the gradient portion 54 in the direction of the central axis X of the outer conductor 50. In addition, the insulator 40 may be located at a position away from the gradient portion 54, and the other of the first press-in portion 35a and the second press-in portion 35b may overlap with the gradient portion 54 at a position away from the insulator 40.

[0076] Here, the other side of the first press-in portion 35a and the second press-in portion 35b overlapping with the gradient portion 54 in the direction of the central axis X of the outer conductor 50 includes not only the case where the other side of the first press-in portion 35a and the second press-in portion 35b overlaps with the gradient portion 54 in the direction of the central axis X of the outer conductor 50 as a whole, but also includes the case where at least a portion of the other side of the first press-in portion 35a and the second press-in portion 35b overlaps with at least a portion of the gradient portion 54 in the direction of the central axis X of the outer conductor 50.

[0077] If the first press-fit protrusion 36a of the first press-fit portion 35a (or the second press-fit protrusion 36b of the second press-fit portion 35b) is located at a position overlapping the gradient portion 54 in the direction of the central axis X, the impedance of the coaxial connector 30 can be easily adjusted. For example, the impedance of the coaxial connector 30 can be easily adjusted to be within the range of ±10Ω, preferably ±5Ω, for the target impedance corresponding to the impedance of the coaxial cable or the like that is the other party to be connected.

[0078] That is, in order to satisfy the communication performance via the coaxial connector 30, it is desirable to adjust the impedance according to the communication path to be connected. The impedance in the coaxial connector 30 is adjusted by the distance between the inner conductor 32 and the outer conductor 50 and the dielectric constant of the insulator 40, etc. In the small diameter portion 52 where the same diameter portion of the outer conductor 50 is continuous, the distance between the inner conductor 32 and the outer conductor 50 is constant along the central axis X. In addition, even in the large diameter portion 56 where the same diameter portion of the outer conductor 50 is continuous, the distance between the inner conductor 32 and the outer conductor 50 is constant along the central axis X. Therefore, in the small diameter portion 52 and the large diameter portion 56, the impedance can be easily adjusted in consideration of the distance between the inner conductor 32 and the outer conductor 50. On the other hand, in the gradient portion 54, the distance between the inner conductor 32 and the outer conductor 50 varies along the central axis X, so it may be difficult to adjust the impedance in consideration of the distance between the inner conductor 32 and the outer conductor 50.

[0079] Therefore, if the first press-fit protrusion 36a of the first press-fit portion 35a (or the second press-fit protrusion 36b of the second press-fit portion 35b) overlaps with the gradual change portion 54 in the direction of the central axis X, the distance between the inner conductor 32 and the outer conductor 50 can be grasped to be constant or substantially constant in the portion where the first press-fit protrusion 36a (or the second press-fit protrusion 36b) is formed along the central axis X. Thus, the impedance can be easily adjusted considering that the distance between the inner conductor 32 and the outer conductor 50 can be grasped to be constant or substantially constant.

[0080] From the above viewpoint, in order to minimize the variation in the distance between the inner conductor 32 and the outer conductor 50 in the gradient portion 54, for example, the second press-fit protrusion 36b (or the first press-fit protrusion 36a) may overlap more than 80% of the gradient portion 54 in the axial direction of the outer conductor 50.

[0081] In addition, in order to minimize the variation of the distance between the inner conductor 32 and the outer conductor 50 in the portion where the second press-fit protrusion 36b (or the first press-fit protrusion 36a) is arranged, the direction in which the gradient portion 54 is inclined and the direction in which the first inclined surface 36a1 (or the second inclined surface 36b1) is inclined relative to the direction along the central axis X may be the same. In the present embodiment, the gradient portion 54 and the first inclined surface 36a1 (or the second inclined surface 36b1) arranged therein are inclined so as to gradually move toward the outer circumference from the small diameter portion 52 toward the large diameter portion 56. In order to further minimize the variation of the distance between the inner conductor 32 and the outer conductor 50 in the portion where the second press-fit protrusion 36b (or the first press-fit protrusion 36a), for example, the inclination θ2 of the first inclined surface 36a1 (or the second inclined surface 36b1) relative to the central axis X is within ±5 degrees compared to the inclination θ1 of the gradient portion 54 relative to the central axis X.

[0082] In addition, the insulator 40 may have a recess or projection for preventing the outer conductor 50 from falling off or rotating. In addition, the outer conductor 50 may have a recess or projection for preventing the insulator 40 or the holding hole 17h from falling off or rotating.

[0083] <Effects, etc.> According to the coaxial connector 30 configured as above, the inner conductor 32 includes the first press-in portion 35a located near the first end 34a and the second press-in portion 35b located near the second end 34b. In a state where the first end 34a and the second end 34b extend from the insulator, one of the first press-in portion 35a and the second press-in portion 35b is pressed into the insertion hole 44, and the inner conductor 32 is held by the insulator 40. Therefore, no matter which of the first press-in portion 35a and the second press-in portion 35b is pressed into the insertion hole 44, the inner conductor 32 is inserted into the insertion hole 44 and held by the insulator 40. In addition, the first press-in portion 35a and the second press-in portion 35b are located at positions equidistant from the center of the inner conductor 32 in the extending direction. Therefore, the positions of the first end 34a and the second end 34b relative to the insulator 40 in a state where the first press-fit portion 35a is pressed into the insertion hole 44 and the positions of the first end 34a and the second end 34b relative to the insulator 40 in a state where the second press-fit portion 35b is pressed into the insertion hole 44 can be made consistent. In other words, the assembly state of the inner conductor 32 relative to the insulator 40 can be made the same regardless of whether the first press-fit portion 35a or the second press-fit portion 35b is pressed into the insertion hole 44. Thus, incorrect assembly of the inner conductor 32 relative to the insulator 40 can be suppressed.

[0084] In addition, misassembly of the inner conductor relative to the insulator means that the assembly state of the inner conductor relative to the insulator changes from the normal state in design to a different state. Unlike the present invention, when the press-in portion is provided only from one end of the inner conductor, if the press-in direction of the inner conductor is wrong, misassembly in which the press-in portion is not prevented from falling out inside the insulator may occur. In the connector of the present invention, when the press-in portions are provided near both ends of the inner conductor 32, respectively, no matter which direction the two ends of the inner conductor are inserted into the insulator, any press-in portion can prevent falling out inside the insulator, thereby suppressing the occurrence of misassembly.

[0085] Furthermore, if the portion of the inner conductor 32 from the center in the extending direction to the first end 34a and the portion of the inner conductor 32 from the center in the extending direction to the second end 34b have the same shape, the assembly state of the inner conductor 32 with respect to the insulator 40 can be made more uniform regardless of whether the first press-fit portion 35a or the second press-fit portion 35b is pressed into the insertion hole 44. Thus, the connection with the other connector inside and outside the housing 12 can be smoothly performed.

[0086] In addition, the first press-in portion 35a includes a first press-in protrusion 36a, and the first press-in protrusion 36a has a first inclined surface 36a1 and a first anti-slip surface 36a2, and the second press-in portion 35b includes a second press-in protrusion 36b, and the second press-in protrusion 36b has a second inclined surface 36b1 and a second anti-slip surface 36b2. Therefore, by making the first inclined surface 36a1 or the second inclined surface 36b1 contact the opening edge and the inner periphery of the insertion hole 44, the first press-in portion 35a or the second press-in portion 35b can be easily inserted into the insertion hole. In the state where the first press-in portion 35a or the second press-in portion 35b is inserted into the insertion hole 44, the first anti-slip surface 36a2 or the second anti-slip surface 36b2 is hooked on the inner periphery of the insertion hole 44, and the first press-in portion 35a or the second press-in portion 35b is not easy to fall off from the insertion hole 4. Thus, the inner conductor 32 is firmly held by the insulator 40 .

[0087] In addition, if the first inclined surface 36a1 and the second inclined surface 36b1 have the same inclination angle, the first anti-slip surface 36a2 and the second anti-slip surface 36b2 are opposite to each other, and their inclination angles are the same, it is easy to make the first press-in portion 35a and the second press-in portion 35b have the same shape. As a result, no matter which of the first press-in portion 35a and the second press-in portion 35b is pressed into the insertion hole 44, the assembly state of the inner conductor 32 with respect to the insulator 40 can be made more uniform. As a result, it is easy to make the connection state with the other side connector inside and outside the housing 12 uniform.

[0088] In addition, when one of the first press-in portion 35a and the second press-in portion 35b is inserted into the insertion hole 44, the other of the first press-in portion 35a and the second press-in portion 35b is located at a position overlapping with the gradient portion 54 in the direction of the central axis X. Therefore, in the gradient portion 54, the distance between the inner conductor 32 and the outer conductor 50 can be kept as constant as possible. As a result, in the gradient portion 54, the impedance can be easily adjusted.

[0089] That is, in order to prevent misassembly, the first press-in portion 35a and the second press-in portion 35b are provided on the inner conductor 32, one of which is used to prevent the inner conductor from being disengaged, and the other is used for impedance adjustment. Therefore, if only impedance adjustment is required, no new protrusion may be provided on the inner conductor.

[0090] Impedance adjustment is easily performed in the coaxial connector 30 , and as a result, impedance matching can be performed, thereby improving the communication performance via the coaxial connector 30 .

[0091] For example, if the other of the first press-fit portion 35a and the second press-fit portion 35b overlaps 80% or more of the gradient portion 54 in the direction of the central axis X, the distance between the outer conductor 50 and the inner conductor 32 can be kept as constant as possible in most of the gradient portion 54. Thus, the impedance can be easily adjusted in the gradient portion 54.

[0092] If the inclination θ2 of the first inclined surface 36 a 1 and the second inclined surface 36 b 1 is within ±5 degrees of the inclination θ1 of the gradient portion 54 , the distance between the outer conductor 50 and the inner conductor 32 can be kept more constant in the gradient portion 54 .

[0093] Furthermore, if the first slope 36a1 and the second slope 36b1 each include an arc-shaped portion centered on the central axis X, the distance between the outer conductor 50 and the inner conductor 32 can be kept more constant in the circumferential direction centered on the central axis X. This facilitates impedance adjustment.

[0094] In addition, in each of the first press-in portion 35a and the second press-in portion 35b, multiple first press-in protrusions 36a or multiple second press-in protrusions 36b are located around the central axis X at intervals, so press-in is easier than in the case where protrusions for press-in protrude around the entire circumference of the press-in portion.

[0095] In addition, in each of the first press-fit portion 35a and the second press-fit portion 35b, the plurality of first press-fit protrusions 36a or the plurality of second press-fit protrusions 36b are located at equal intervals around the central axis X, so that it is easy to give rotational symmetry to the physical properties that affect the impedance around the inner conductor 32. As a result, the impedance around the inner conductor 32 is stabilized.

[0096] [Modifications] The coaxial connector 30 described above can also be applied to the connection between electrical components and cables that are not based on the device 10 .

[0097] In addition, the respective configurations described in the above-mentioned embodiment and the respective modifications can be appropriately combined as long as they do not contradict each other. Description of Reference Numerals

[0098] 10 Equipment 12 Shell 131st Shell 14 Second Shell 15 Bottom 16 Holding cylinder 17. Maintain the partition 17h holding hole 18a Stopping protrusion 20Electrical components 21 Circuit board 22 Camera Components 24 PCB side connector 25 Inner conductor on substrate side 26 substrate side insulator 27 Substrate side outer conductor 30 coaxial connector 32 Inner conductor 33a 1st connection end 33b Second connection end 34a End 1 34b End 2 35Ba 1st press-fit body 35Bb 2nd press-fit body 35a 1st press-fit portion 35b Second press-fit portion 36a First press-in protrusion 36a1 1st slope 36a2 1st anti-slip surface 36b Second press-in protrusion 36b1 2nd slope 36b2 2nd anti-slip surface 39 middle waist 40 Insulator 44 Insertion hole 44a, 44c openings 44b hole body 50 Outer conductor 52 Trail Section 54 Gradient 56 large diameter part 90 relay connector 91 Movable inner conductor 92 Movable side insulator 93 Movable side outer conductor X center axis θ1, θ2 inclination

Claims

1. A coaxial connector comprising an inner conductor, an insulator surrounding the inner conductor, and a cylindrical outer conductor surrounding the insulator, The inner conductor is in the shape of a rod including a first end and a second end, The inner conductor includes a first press-fit portion located near the first end and a second press-fit portion located near the second end in the extending direction of the inner conductor. The first press-in portion and the second press-in portion are located at equal distances from the center of the inner conductor in the extending direction. The insulator has an insertion hole, and the inner conductor is inserted into the insertion hole. In a state where the first end and the second end extend from the insulator, one of the first press-in portion and the second press-in portion is press-fitted into the insertion hole, and the inner conductor is held by the insulator.

2. The coaxial connector according to claim 1, wherein: A portion of the inner conductor from the center in the extending direction to the first end and a portion of the inner conductor from the center in the extending direction to the second end have the same shape.

3. The coaxial connector according to claim 1 or claim 2, wherein: The first press-in portion includes a first press-in protrusion, the first press-in protrusion having a first inclined surface and a first anti-slip surface, the first inclined surface gradually extending from the first end side of the inner conductor toward the central side of the inner conductor in the extension direction toward the outer peripheral side, and the first anti-slip surface extending from the edge of the first inclined surface on the central side of the inner conductor in the extension direction toward the center of the inner conductor, The second press-in portion includes a second press-in protrusion, the second press-in protrusion having a second inclined surface and a second anti-slip surface, the second inclined surface gradually extending from the second end side of the inner conductor toward the central side of the extension direction of the inner conductor toward the outer peripheral side, and the second anti-slip surface extending from the edge of the second inclined surface on the central side of the extension direction of the inner conductor toward the center of the inner conductor.

4. The coaxial connector according to claim 3, wherein: The first inclined surface and the second inclined surface have the same inclination angle relative to the central axis of the inner conductor. The first and second anti-detachment surfaces face each other and have the same inclination angle with respect to the central axis of the inner conductor.

5. The coaxial connector according to claim 3, wherein: The outer conductor includes a small diameter portion, a large diameter portion larger than the small diameter portion, and a gradual change portion between the small diameter portion and the large diameter portion, the diameter of which gradually increases. When one of the first and second press-in protrusions is press-fitted into the insertion hole, the other of the first and second press-in protrusions is located at a position overlapping the gradient portion in the axial direction of the outer conductor.

6. The coaxial connector according to claim 5, wherein: When one of the first and second press-in protrusions is press-fitted into the insertion hole, the other of the first and second press-in protrusions overlaps with more than 80% of the gradient portion in the axial direction of the outer conductor.

7. The coaxial connector according to claim 5, wherein: The inclinations of the first inclined surface and the second inclined surface relative to the central axis of the inner conductor are within ±5 degrees of the inclination of the gradient portion relative to the central axis of the outer conductor.

8. The coaxial connector according to claim 3, wherein: The first inclined surface and the second inclined surface each include an arc-shaped portion centered on a central axis of the outer conductor.

9. The coaxial connector according to claim 3, wherein: The first press-in portion includes a plurality of first press-in protrusions. The second press-in portion includes a plurality of second press-in protrusions. In the first press-fit portion, the plurality of first press-fit protrusions are located at intervals around the central axis of the inner conductor. In the second press-fit portion, the plurality of second press-fit protrusions are located at intervals around a central axis of the inner conductor.

10. The coaxial connector according to claim 9, wherein: In the first press-fit portion, the plurality of first press-fit protrusions are located at equal intervals around the central axis of the inner conductor. In the second press-fit portion, the plurality of second press-fit protrusions are located at equal intervals around a central axis of the inner conductor.

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