Coaxial connector

Abstract

To make measurement of dimensions using a scale unnecessary when a part of a covering part of a coaxial cable is removed.SOLUTION: A coaxial connector 30 is attached to a coaxial cable 12 having a covering part 16 covering a conductor part 13. The coaxial connector 30 includes: a cylindrical part 52; a first dimension line A1; a second dimension line A2; and an end surface 53. The cylindrical part 52 is provided at a distal end part of the coaxial cable 12 in an axial direction. The first dimension line A1 or the second dimension line A2 is provided in the cylindrical part 52, and positions the distal end of the coaxial cable 12 in the axial direction. The end surface 53 is provided on the cylindrical part 52 so that the distance in the axial direction to the first dimension line A1 or the second dimension line A2 is equal to the length in the axial direction of a stripped range of the covering part 16. The end surface 53 indicates a cutting target position at which the covering part 16 is cut when a tip of the coaxial cable 12 is positioned on the first dimension line A1 or the second dimension line A2.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Patent Document 1 discloses a manufacturing method for a coaxial cable assembly, which includes a step of peeling the sheath to expose the outer conductor, and a step of peeling the integrated outer conductor in a stepped manner to expose the center conductor. Coaxial connectors are attached to both ends of the coaxial cable from which the integrated outer conductor has been peeled in a stepped manner. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-157389 Summary of the Invention [Problem to be solved by the invention]

[0004] A coaxial connector is attached to a portion of a coaxial cable where a portion of the covering, such as an insulator that covers the conductor, has been removed. When removing a portion of the covering of the coaxial cable, a scale is used to measure the dimensions so that the axial dimension of the removed area of the covering is a predetermined dimension. The portion of the covering whose dimensions have been measured using the scale is then cut and removed using a tool such as a cutter. In this way, when removing a portion of the covering of a coaxial cable, it is necessary to prepare a scale and use it to measure the dimension from the end of the coaxial cable to the cutting position, which is a time-consuming process.

[0005] The present invention has been made to solve such problems, and has an object to make it unnecessary to measure dimensions using a scale when removing a portion of the coating of a coaxial cable. [Means for solving the problem]

[0006] A coaxial connector according to one aspect of the present invention is attached to a coaxial cable having a coating portion that covers a conductor portion. The coaxial connector has a tubular portion, a reference portion, and a marker portion. The tubular portion is provided at the axial tip portion of the coaxial cable. The reference portion is provided at the tubular portion and positions the axial tip portion of the coaxial cable. The marker portion is provided at the tubular portion so that the axial distance from the reference portion is equal to the axial length of the stepped stripping range of the coating portion. The marker portion indicates a cutting target position where the coating portion is to be cut when the tip portion of the coaxial cable is positioned at the reference portion. [Effects of the Invention]

[0007] According to the coaxial connector of the present invention, when removing a portion of the sheath of the coaxial cable, it is not necessary to measure dimensions using a scale. [Brief explanation of the drawings]

[0008] [Figure 1] 1A and 1B are diagrams illustrating a coaxial connector, a coaxial cable, and a mating connector according to a first embodiment. [Figure 2] 2 is a diagram showing a state in which the coaxial cable of FIG. 1 is stripped in stages. [Figure 3] 2 is a diagram showing a connector housing of the coaxial connector of FIG. 1. [Figure 4] 4 is a diagram showing an end face of the connector housing in FIG. 3 and a state in which the sheath of the coaxial cable is cut using a first dimension line. [Figure 5] 5 is a diagram showing a state in which each member is provided on the coaxial cable of FIG. 4 and the outer conductor portion is bent. [Figure 6] 6 is a diagram showing a state in which the insulating portion of the coaxial cable of FIG. 5 is cut using the end face of the connector housing of FIG. 3 and the second dimension line. [Figure 7] 10A and 10B are diagrams illustrating a connector housing of a coaxial connector according to a second embodiment. [Figure 8]8 is a diagram showing a state in which the sheath and the insulator of the coaxial cable are cut using the reference line, the first dimension line, and the second dimension line of the connector housing of FIG. 7. FIG. [Figure 9] 10A and 10B are diagrams illustrating a connector housing of a coaxial connector according to a third embodiment. [Figure 10] 10 is a diagram showing a state in which the blade of the cutter is guided by a groove portion of the connector housing of FIG. 9. FIG. [Figure 11] 10 is a diagram showing a state in which the sheath and the insulator of the coaxial cable are cut using the reference line, the first dimension line, and the second dimension line of the connector housing of FIG. 9. FIG. [Figure 12] 10A and 10B are diagrams illustrating a connector housing of a coaxial connector according to a fourth embodiment. [Figure 13] 13 is a diagram showing a state in which the sheath and the insulator of the coaxial cable are cut using the reference line, the first dimension line, and the second dimension line of the connector housing of FIG. 12. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] Each embodiment will be described below with reference to the drawings. In all drawings referred to in describing each embodiment, the same or substantially the same configurations and elements will be designated by the same reference numerals. Furthermore, once a configuration or element has been described, it will not be described again.

[0010] [Configuration of the first embodiment] 1 shows a coaxial connector 30 according to the first embodiment, a coaxial cable 12, and a mating connector 20. The coaxial connector 30 is provided at an end of the coaxial cable 12. The coaxial connector 30 is connectable to the mating connector 20. In the following description, the direction in which the central axis C of the coaxial connector 30 extends is referred to as the "axial direction" and is illustrated by the arrow Z. Furthermore, the direction perpendicular to the axial direction is referred to as the "radial direction."

[0011] <Mating connector> The mating connector 20 has an outer electrode portion 22 and an inner electrode portion 24. A mating portion 34 of a connector housing 32 (described later) is fitted into the outer electrode portion 22. A hole 26 is formed in the inner electrode portion 24. A tip portion of a center pin 48 of the coaxial connector 30 is inserted into the hole 26. When the center pin 48 is inserted into the hole 26, the center pin 48 is electrically connected to the inner electrode portion 24.

[0012] <Coaxial cable> As shown in Fig. 2, the coaxial cable 12 has a conductor 13 and a coating 16. The conductor 13 has an inner conductor 14 and an outer conductor 15. The coating 16 has an insulator 17 and a sheath 18. Fig. 2 shows a state in which one axial end of the sheath 18 and one axial end of the insulator 17 have been stripped in steps. In the stepped-stripped coaxial cable 12, one axial end of each of the inner conductor 14, the outer conductor 15, and the insulator 17 is exposed.

[0013] The inner conductor portion 14 is disposed in the center of the coaxial cable 12. In other words, the inner conductor portion 14 is located on the central axis C. The inner conductor portion 14 contains, for example, copper. Note that the inner conductor portion 14 may be a pipe-shaped conductor made of a copper alloy or a conductor containing a metal other than copper.

[0014] The insulator 17 is located radially outward from the inner conductor 14. The insulator 17 is also located radially inward from a sheath 18, which will be described later. The insulator 17 is an example of an inner coating. When the coaxial cable 12 is not stepped (uncut), the insulator 17 covers the entire outer circumferential surface of the inner conductor 14.

[0015] The outer conductor 15 is located radially outward from the insulator 17. The outer conductor 15 is made of a braided material, for example. In an uncut state, the outer conductor 15 covers the entire outer peripheral surface of the insulator 17. After step stripping, the exposed portion of the outer conductor 15 is bent from one end to the other end in the axial direction.

[0016] The sheath 18 is made of resin. The sheath 18 is located radially outward of the outer conductor 15. The sheath 18 is an example of an outer covering. In an uncut state, the sheath 18 covers the entire outer peripheral surface of the outer conductor 15.

[0017] An end face 12A is formed at one axial end of the coaxial cable 12. The end face 12A is an example of the tip of the coaxial cable 12. The end face 12A is formed in a planar shape that is perpendicular to the axial direction of the coaxial cable 12. The end face 12A includes the end faces of the inner conductor 14, the outer conductor 15, the insulator 17, and the sheath 18.

[0018] The axial removal range of the portion of the covering portion 16 that is cut and removed is defined as the step stripping range. A step stripping range SA is set in advance for the sheath 18. A step stripping range SB is set in advance for the insulator 17. The axial length of the step stripping range SA is defined as L1, and the axial length of the step stripping range SB is defined as L2. The length L2 is shorter than the length L1.

[0019] <Coaxial connector> 1, a coaxial connector 30 is attached to a coaxial cable 12. The coaxial connector 30 includes a connector housing 32, a mating portion 34, a nut member 36, and a snap ring 38. The coaxial connector 30 also includes a clamp nut 41, a fastener 42, a washer 43, a gasket 44, a clamp 45, a retaining ring 46, a washer 47, a center pin 48, a first insulator 49, and a second insulator 51. The coaxial connector 30 also includes a cylindrical portion 52, a first dimension line A1, a second dimension line A2, and an end face 53.

[0020] Details of the connector housing 32 will be described later. The fitting portion 34 is cylindrically formed at one axial end of the connector housing 32. The nut member 36 is rotatable relative to the connector housing 32. A snap ring 38 restricts relative axial movement of the nut member 36 with respect to the connector housing 32.

[0021] The clamp nut 41 is formed in a cylindrical shape. The coaxial cable 12 is inserted into the clamp nut 41. The fastening member 42 is attached to the sheath 18. The clamp nut 41 is positioned in the axial direction by contacting the fastening member 42. The washer 43 is in contact with one end of the clamp nut 41 and one end of the fastening member 42. The gasket 44 is in contact with one end face of the washer 43.

[0022] The clamp 45 is in axial contact with one end face of the sheath 18 and one end face of the gasket 44. The clamp 45 is fitted into the retaining ring 46. The washer 47 is sandwiched between the connector housing 32 and a part of the outer conductor 15 in the axial direction.

[0023] The center pin 48 is attached to one axial end of the inner conductor portion 14. The first insulator 49 brings the inner conductor portion 14 into radial contact with the center pin 48. The second insulator 51 contacts the connector housing 32 and positions the center pin 48.

[0024] As shown in FIG. 3, the connector housing 32 has a tubular portion 52, a first dimension line A1, a second dimension line A2, and an end surface 53.

[0025] <<Cylinder part>> The tubular portion 52 is provided at one axial end of the coaxial cable 12 (FIG. 1). The tubular portion 52 is formed in a cylindrical shape centered on the central axis C. An end face 53 is formed at the other axial end of the tubular portion 52. The end face 53 is a flat surface that is perpendicular to the axial direction of the coaxial cable 12.

[0026] The tubular portion 52 has a housing portion 54 that houses one end of the coaxial cable 12. The housing portion 54 is open toward the other axial side. The housing portion 54 is formed with a first stepped surface 55 and a second stepped surface 56, each of which is a surface along the radial direction. The tubular portion 52 also has an outer circumferential surface 58.

[0027] <<First dimension line and second dimension line>> A first dimension line A1 and a second dimension line A2 are drawn on the outer peripheral surface 58. In other words, the first dimension line A1 and the second dimension line A2 are provided on the tubular portion 52. The first dimension line A1 and the second dimension line A2 are each positioned at an interval in the axial direction and are lines that extend in the circumferential direction of the outer peripheral surface 58.

[0028] The first dimension line A1 and the second dimension line A2 enable an operator to position the end face 12A (FIG. 2) of the coaxial cable 12 (FIG. 1) in the axial direction of the coaxial cable 12 when viewing the outer circumferential surface 58 from the radial direction. In other words, the first dimension line A1 and the second dimension line A2 are each an example of a reference portion. The colors of the first dimension line A1 and the second dimension line A2 may be the same or different. Furthermore, the colors of the first dimension line A1 and the second dimension line A2 are not limited to black and may be a color other than black.

[0029] <<End face>> When the outer peripheral surface 58 is viewed radially, the end surface 53 serves as a mark (line) indicating the axial cutting position of the coaxial cable 12 (FIG. 1). In other words, the end surface 53 is an example of a mark portion. The end surface 53 is provided on the outer peripheral surface 58 so that the axial distance d1 from the first dimension line A1 is equal to the axial length L1 (FIG. 2) of the stepped stripping range SA (FIG. 2). Furthermore, the end surface 53 is provided on the outer peripheral surface 58 so that the axial distance d2 from the second dimension line A2 is equal to the axial length L2 (FIG. 2) of the stepped stripping range SB (FIG. 2).

[0030] In this way, when the first dimension line A1 or the second dimension line A2 is used as a reference portion, the end surface 53 functions as a mark portion.

[0031] When the end face 12A (FIG. 2) is positioned on the first dimension line A1 when the outer circumferential surface 58 is viewed from the radial direction, the end face 53 serves as a mark indicating the cutting position P1 (FIG. 2) of the sheath 18. When the end face 12A is positioned on the second dimension line A2, the end face 53 serves as a mark indicating the cutting position P2 (FIG. 2) of the insulator 17.

[0032] It is possible to interchange the function of the first dimension line A1 or the second dimension line A2 with the function of the end surface 53. That is, it is possible to use the end surface 53 as a reference portion, and the first dimension line A1 and the second dimension line A2 as marker portions. Specifically, when the end surface 53 is used as a reference portion, the first dimension line A1 functions as a first marker indicating the position P1 to be cut. Furthermore, when the end surface 53 is used as a reference portion, the second dimension line A2 functions as a second marker indicating the position P2 to be cut.

[0033] [Operation of the first embodiment] A method for step-stripping the coaxial cable 12 using the coaxial connector 30 and a method for attaching the coaxial connector 30 to the coaxial cable 12 will be described.

[0034] As shown in FIG. 4, when viewed from the radial direction, the end face 12A of the coaxial cable 12 and the first dimension line A1 are arranged so as to be aligned on the same straight line. This positions the coaxial cable 12 in the axial direction. The end face 53 is shown as a line segment perpendicular to the axial direction. At this time, the position on the extension line of the end face 53 (line segment) of the coaxial cable 12 becomes the cutting position P1 of the sheath 18. Then, the worker uses a cutter K to cut the sheath 18 at the cutting position P1 along the extension line of the end face 53. The cut end portion of the sheath 18 in the axial direction is removed.

[0035] 5 , after cutting and removing a portion of the sheath 18, the outer circumferential surface of the insulator 17 and the outer conductor 15 are exposed in the coaxial cable 12. In this state, a clamp nut 41, a fastener 42, a washer 43, a gasket 44, and a clamp 45 are attached to the coaxial cable 12. Furthermore, the outer conductor 15 is bent to cover the outer circumferential surface of the clamp 45. A portion of the outer conductor 15 is then sandwiched between the clamp 45 and a press ring 46.

[0036] As shown in FIG. 6, the end face 12A and the second dimension line A2 are arranged so as to be aligned on the same straight line when viewed from the radial direction. This positions the coaxial cable 12 in the axial direction. At this time, a position on the coaxial cable 12 on an extension of the end face 53 becomes a cutting position P2 of the insulator 17. Then, the worker uses a cutter K to cut the insulator 17 at the cutting position P2 along the extension of the end face 53. A portion of the cut insulator 17 in the axial direction is removed. This exposes the inner conductor portion 14, completing the step-stripping operation of the coaxial cable 12.

[0037] 1, the axial positions of the clamp nut 41, fastener 42, washer 43, gasket 44, clamp 45, and retainer ring 46 are adjusted in the stepped stripped coaxial cable 12. Then, a washer 47, a center pin 48, a first insulator 49, and a second insulator 51 are attached to one axial end of the coaxial cable 12.

[0038] Furthermore, a connector housing 32, a fitting portion 34, a nut member 36, and a snap ring 38 are attached to the coaxial cable 12. A connector (not shown) is attached to the other axial end of the coaxial cable 12. In this manner, an assembly of the coaxial cable 12 with the coaxial connector 30 attached is completed.

[0039] As described above, by using the end face 53 of the coaxial connector 30 and the first dimension line A1 and the second dimension line A2, it is possible to determine the cutting position P1 of the sheath 18 and the cutting position P2 of the insulator 17 relative to the end face 12A. In other words, it is possible to know the cutting positions P1 and P2 without measuring dimensions using a scale, and to perform stepped stripping of the coaxial cable 12. In this way, when removing a portion of the coating 16 of the coaxial cable 12, it is not necessary to measure dimensions using a scale. This also reduces the work time required to attach the coaxial connector 30 to the coaxial cable 12.

[0040] Additionally, a first dimension line A1 and a second dimension line A2 are provided on the outer peripheral surface 58 of the coaxial connector 30. When the end surface 53 is used as a reference portion, the first dimension line A1 functions as a first mark indicating the position P1 to be cut on the sheath 18. The second dimension line A2 functions as a second mark indicating the position P2 to be cut on the insulator 17. In this way, by using the coaxial connector 30, two dimensions can be obtained (indicating the positions P1 and P2 to be cut), so even if there are multiple locations where the coaxial cable 12 needs to be stripped in steps, one coaxial connector 30 can be used to accommodate them.

[0041] [Configuration of the second embodiment] A coaxial connector 60 according to the second embodiment will be described below with reference to the drawings. Note that the same or similar configurations and functions as those of the first embodiment will be denoted by the same reference numerals as those of the first embodiment, and descriptions thereof will be omitted.

[0042] 7 shows a portion of a coaxial connector 60. The coaxial connector 60 has a configuration in which the connector housing 32 (FIG. 1) of the coaxial connector 30 (FIG. 1) is replaced with a connector housing 62. The components other than the connector housing 62 have the same configuration as the coaxial connector 30. The connector housing 62 has a cylindrical portion 52, a reference line B1, a first dimension line A3, and a second dimension line A4.

[0043] <<Baseline>> The reference line B1 is an example of a reference portion and is provided on the outer peripheral surface 58. Specifically, the reference line B1 is formed by a groove 64 formed on the outer peripheral surface 58. The groove 64 is visible as the reference line B1 when the outer peripheral surface 58 is viewed from the radial direction. The reference line B1 is a line extending in the circumferential direction. Furthermore, when the outer peripheral surface 58 is viewed from the radial direction, the reference line B1 enables the end face 12A (FIG. 2) to be positioned in the axial direction. Note that the reference line B1 may be a line drawn on the outer peripheral surface 58.

[0044] <<First dimension line and second dimension line>> The first dimension line A3 and the second dimension line A4 are each an example of a marking portion. When the outer circumferential surface 58 is viewed from the radial direction, the first dimension line A3 and the second dimension line A4 serve as marks that indicate cutting positions P1 and P2 (FIG. 2) in the axial direction of the coaxial cable 12 (FIG. 1). The first dimension line A3 and the second dimension line A4 are also an example of a groove portion recessed radially from the outer circumferential surface 58. The first dimension line A3 and the second dimension line A4 are formed by cutting the outer circumferential surface 58.

[0045] The first dimension line A3 is formed by the first groove 66. In other words, the first groove 66 is visible as the first dimension line A3 when the outer peripheral surface 58 is viewed from the radial direction. The first dimension line A3 is a line extending in the circumferential direction. The first dimension line A3 and the reference line B1 are positioned with a distance d1 between them in the axial direction.

[0046] The second dimension line A4 is formed by the second groove 68. In other words, the second groove 68 is visible as the second dimension line A4 when the outer peripheral surface 58 is viewed from the radial direction. The second dimension line A4 is a line extending in the circumferential direction. The second dimension line A4 and the reference line B1 are positioned with a distance d2 between them in the axial direction.

[0047] The inner surfaces of the first grooves 66 and the second grooves 68 are not colored. However, the inner surfaces of the first grooves 66 and the second grooves 68 may be colored. The color of the inner surface of the first grooves 66 and the color of the inner surface of the second grooves 68 may be the same or different.

[0048] When the end face 12A (FIG. 2) is positioned on the reference line B1 when viewing the outer peripheral surface 58 from the radial direction, the first dimension line A3 becomes a first mark indicating the cutting position P1 (FIG. 2) of the sheath 18. When the end face 12A is positioned on the reference line B1, the second dimension line A4 becomes a second mark indicating the cutting position P2 (FIG. 2) of the insulator 17.

[0049] Since each of the groove 64, the first groove 66, and the second groove 68 has a predetermined width in the axial direction, even if it is difficult to recognize it as a thin wire, the cutting positions P1 and P2 can be determined by aligning them with the center positions of the groove 64, the first groove 66, and the second groove 68 in the axial direction.

[0050] [Operation of the second embodiment] A method for step-stripping the coaxial cable 12 using the coaxial connector 60 will be described.

[0051] As shown in FIG. 8, the end face 12A and the reference line B1 are arranged so as to be aligned on the same straight line when viewed from the radial direction. This positions the coaxial cable 12 in the axial direction. At this time, a position on the extension of the first dimension line A3 in the coaxial cable 12 becomes a cutting position P1 of the sheath 18. Then, at the cutting position P1, the cutter K cuts the sheath 18 along the first dimension line A3. The cut end of the sheath 18 in the axial direction is removed. With the axial portion of the sheath 18 removed in the coaxial cable 12, the insulator 17 and the outer conductor portion 15 are exposed.

[0052] Next, it is confirmed that the end face 12A and the reference line B1 are aligned on the same straight line when viewed from the radial direction. At this time, the position on the coaxial cable 12, which is an extension of the second dimension line A4, becomes the cutting position P2 of the insulator 17. Then, at the cutting position P2, the cutter K cuts the insulator 17 along the second dimension line A4. The axial end of the cut insulator 17 is removed. This exposes the inner conductor portion 14, and the step-stripping operation of the coaxial cable 12 is completed.

[0053] As described above, with the coaxial connector 60, it is not necessary to measure dimensions using a scale when removing a portion of the coating 16. This also reduces the work time required to attach the coaxial connector 60 to the coaxial cable 12.

[0054] Furthermore, in the coaxial connector 60, the first dimension line A3 and the second dimension line A4 are formed by the first groove 66 and the second groove 68. As a result, the first dimension line A3 and the second dimension line A4 are less likely to disappear even when the outer peripheral surface 58 is worn, compared to lines drawn on the outer peripheral surface 58. Also, since the first dimension line A3 and the second dimension line A4 are formed by the first groove 66 and the second groove 68, the outer peripheral surface 58 of the coaxial connector 60 can be brought into direct contact with the outer peripheral surface of the sheath 18 of the coaxial cable 12.

[0055] [Configuration of the third embodiment] A coaxial connector 70 according to the third embodiment will be described below with reference to the drawings. Note that the same or similar configurations and functions as those of the first and second embodiments will be denoted by the same reference numerals as those of the first and second embodiments, and descriptions thereof will be omitted.

[0056] 9 shows a portion of a coaxial connector 70. The coaxial connector 70 has a configuration in which the connector housing 32 (FIG. 1) of the coaxial connector 30 (FIG. 1) is replaced with a connector housing 72. The configuration other than the connector housing 72 is the same as that of the coaxial connector 30. The connector housing 72 has a tubular portion 74, an end face 76 (reference line B2), a first dimension line A5, and a second dimension line A6.

[0057] <<Cylinder part>> The tubular portion 74 is provided at one end in the axial direction of the coaxial cable 12 (FIG. 1). The tubular portion 74 is formed in a substantially cylindrical shape centered on the central axis C. The tubular portion 74 has the accommodating portion 54 and an outer peripheral surface 78. An end face 76 is formed on one side in the axial direction of the tubular portion 74. In other words, the end face 76 is provided on the tubular portion 74. The end face 76 is a plane perpendicular to the axial direction of the coaxial cable 12.

[0058] The outer peripheral surface 78 has a curved surface 78A that is an arc-shaped surface centered on the central axis C, and a D-cut surface 78B that corresponds to a chord of a circle centered on the central axis C. In other words, a part of the outer peripheral surface 78 is provided with the D-cut surface 78B. The D-cut surface 78B is an example of a flat portion. In the axial direction, the range in which the D-cut surface 78B is formed is narrower than the range in which the curved surface 78A is formed. The D-cut surface 78B extends to the end surface 76.

[0059] <<End face>> The end surface 76 is an example of a reference portion. When the outer peripheral surface 78 is viewed from the radial direction, the end surface 76 enables the end surface 12A (FIG. 2) to be positioned in the axial direction. When the outer peripheral surface 78 is viewed from the radial direction, the end surface 76 is visible as a reference line B2. The reference line B2 is a line extending in the circumferential direction. When the D-cut surface 78B is viewed from the radial direction, the reference line B2 is visible to the operator.

[0060] <<First dimension line and second dimension line>> The first dimension line A5 and the second dimension line A6 are each an example of a marking portion. When the outer circumferential surface 78 is viewed from the radial direction, the first dimension line A5 and the second dimension line A6 serve as marks that indicate cutting positions P1 and P2 (FIG. 2) in the axial direction of the coaxial cable 12 (FIG. 1). The first dimension line A5 and the second dimension line A6 are also an example of a groove portion recessed radially from the outer circumferential surface 78. The first dimension line A5 and the second dimension line A6 are formed by cutting the outer circumferential surface 78.

[0061] The first dimension line A5 is formed by the first groove 79A. In other words, the first groove 79A is visible as the first dimension line A5 when the outer peripheral surface 78 is viewed from the radial direction. The first dimension line A5 is a line extending in a direction perpendicular to the axial direction when viewed from the radial direction. The first dimension line A5 and the reference line B2 are positioned with a distance d1 between them in the axial direction.

[0062] The second dimension line A6 is formed by the second groove 79B. In other words, the second groove 79B is visible as the second dimension line A6 when the outer peripheral surface 78 is viewed from the radial direction. The second dimension line A6 is a line extending in a direction perpendicular to the axial direction when viewed from the radial direction. The second dimension line A6 and the reference line B2 are located with a distance d2 between them in the axial direction. The first groove 79A and the second groove 79B are collectively referred to as the groove portion 79.

[0063] The inner surfaces of the first grooves 79A and the second grooves 79B are not colored. The inner surfaces of the first grooves 79A and the second grooves 79B may be colored. The color of the inner surface of the first grooves 79A and the color of the inner surface of the second grooves 79B may be the same or different.

[0064] When the end face 12A (FIG. 2) is positioned on the reference line B2 when viewing the outer circumferential surface 78 from the radial direction, the first dimension line A5 becomes a first mark indicating the cutting position P1 (FIG. 2) of the sheath 18. When the end face 12A is positioned on the reference line B2, the second dimension line A6 becomes a second mark indicating the cutting position P2 (FIG. 2) of the insulator 17.

[0065] [Operation of the third embodiment] A method for step-stripping the coaxial cable 12 using the coaxial connector 70 will now be described.

[0066] 10 shows, as an example, a state in which the connector housing 72 of the coaxial connector 70 and the coaxial cable 12 are placed on the upper surface G of a workbench. Note that the connector housing 72 and the coaxial cable 12 do not necessarily have to be placed on the upper surface G.

[0067] The D-cut surface 78B is located on the coaxial cable 12 side with respect to the central axis C. The D-cut surface 78B is also arranged facing diagonally upward so that it is visible to the operator. When the cutter K is moved diagonally downward along the groove 79, it reaches the upper end of the sheath 18 of the coaxial cable 12. In other words, the cutter K guided by the groove 79 can start cutting the sheath 18 by continuing to move. The cutter K guided by the groove 79 can also cut the insulator 17 after removing the sheath 18.

[0068] As shown in FIG. 11 , the end face 12A and the reference line B2 are arranged so as to be aligned on the same straight line when viewed from the radial direction. This positions the coaxial cable 12 in the axial direction. At this time, a position on an extension of the first dimension line A5 in the coaxial cable 12 becomes a cutting position P1 of the sheath 18. Then, the cutter K guided into the first groove 79A cuts the sheath 18 along the first dimension line A5 at the cutting position P1. The cut end of the sheath 18 in the axial direction is removed. By removing the axial end of the sheath 18 in the coaxial cable 12, the insulator 17 and the outer conductor portion 15 are exposed.

[0069] The position on the extension of the second dimension line A6 is the cutting position P2 of the insulator 17. Then, the cutter K guided into the second groove 79B cuts the insulator 17 along the second dimension line A6 at the cutting position P2. The axial end of the cut insulator 17 is removed. This exposes the inner conductor portion 14, completing the step stripping operation of the coaxial cable 12.

[0070] As described above, with the coaxial connector 70, it is not necessary to measure dimensions using a scale when removing a portion of the coating 16. This also reduces the work time required to attach the coaxial connector 70 to the coaxial cable 12.

[0071] Furthermore, in the coaxial connector 70, the first dimension line A5 and the second dimension line A6 are provided on the D-cut surface 78B. As a result, when an operator views the first dimension line A5 and the second dimension line A6 from an oblique direction intersecting the axial direction, the first dimension line A5 and the second dimension line A6 are recognized as straight lines rather than curved lines. Therefore, compared to a configuration in which the first dimension line A5 and the second dimension line A6 are provided on the curved surface 78A, the cutting target positions P1 and P2 are less likely to be misaligned in the axial direction.

[0072] [Configuration of the fourth embodiment] A coaxial connector 80 according to the fourth embodiment will be described below with reference to the drawings. Note that the same or similar configurations and functions as those of the first, second, and third embodiments will be denoted by the same reference numerals as those of the first, second, and third embodiments, and descriptions thereof will be omitted.

[0073] 12 shows a portion of a coaxial connector 80. The coaxial connector 80 has a configuration in which the connector housing 32 (FIG. 1) of the coaxial connector 30 (FIG. 1) is replaced with a connector housing 82. The configuration other than the connector housing 82 is the same as that of the coaxial connector 30. The connector housing 82 has a cylindrical portion 52, a reference line B3, a first dimension line A7, and a second dimension line A8.

[0074] <<Baseline>> The reference line B3 is an example of a reference portion and is provided on the outer peripheral surface 58. Specifically, the reference line B3 is formed by a protrusion 84 that protrudes radially outward from the outer peripheral surface 58. The protrusion 84 is visible as the reference line B3 when the outer peripheral surface 58 is viewed from the radial direction. The reference line B3 is a line that extends in the circumferential direction. When the outer peripheral surface 58 is viewed from the radial direction, the reference line B3 enables the end face 12A (FIG. 2) to be positioned in the axial direction. Note that the reference line B3 may be a line drawn on the outer peripheral surface 58.

[0075] <<First dimension line and second dimension line>> The first dimension line A7 and the second dimension line A8 are each an example of a marking portion. When the outer circumferential surface 58 is viewed in the radial direction, the first dimension line A7 and the second dimension line A8 serve as marks that indicate cutting positions P1 and P2 (FIG. 2) in the axial direction of the coaxial cable 12 (FIG. 1). The first dimension line A7 and the second dimension line A8 are also an example of a protrusion that protrudes radially outward from the outer circumferential surface 58. The first dimension line A7 and the second dimension line A8 are obtained by molding the connector housing 82.

[0076] The first dimension line A7 is formed by the first protrusion 86. In other words, the first protrusion 86 is visible as the first dimension line A7 when the outer peripheral surface 58 is viewed from the radial direction. The first dimension line A7 is a line extending in the circumferential direction. The first dimension line A7 and the reference line B3 are positioned with a distance d1 between them in the axial direction.

[0077] The second dimension line A8 is formed by the second protrusion 88. In other words, the second protrusion 88 is visible as the second dimension line A8 when the outer peripheral surface 58 is viewed from the radial direction. The second dimension line A8 is a line extending in the circumferential direction. The second dimension line A8 and the reference line B3 are positioned with a distance d2 between them in the axial direction.

[0078] The first protrusion 86 and the second protrusion 88 are not colored. However, the first protrusion 86 and the second protrusion 88 may be colored. The color of the first protrusion 86 and the color of the second protrusion 88 may be the same or different.

[0079] When the end face 12A (FIG. 2) is positioned on the reference line B3 as viewed radially from the outer peripheral surface 58, the first dimension line A7 becomes a first mark indicating the cutting position P1 (FIG. 2) of the sheath 18 (FIG. 2). When the end face 12A is positioned on the reference line B3, the second dimension line A8 becomes a second mark indicating the cutting position P2 (FIG. 2) of the insulator 17 (FIG. 2).

[0080] [Operation of the fourth embodiment] A method for step-stripping the coaxial cable 12 using the coaxial connector 80 will now be described.

[0081] As shown in FIG. 13, the end face 12A and the reference line B3 are arranged so as to be aligned on the same straight line when viewed from the radial direction. This positions the coaxial cable 12 in the axial direction. At this time, in the coaxial cable 12, a position on an extension of the first dimension line A7 becomes the cutting position P1 of the sheath 18. Then, at the cutting position P1, the cutter K cuts the sheath 18 along the first dimension line A7. The cut end of the sheath 18 in the axial direction is removed. With the axial end of the sheath 18 removed, the outer peripheral surface of the insulator 17 and the outer conductor portion 15 of the coaxial cable 12 are exposed.

[0082] Next, it is confirmed that the end face 12A and the reference line B3 are aligned on the same straight line when viewed from the radial direction. At this time, the position on the coaxial cable 12, which is an extension of the second dimension line A8, becomes the cutting position P2 of the insulator 17. Then, at the cutting position P2, the cutter K cuts the insulator 17 along the second dimension line A8. The axial end of the cut insulator 17 is removed. This exposes the inner conductor portion 14 (FIG. 2), and the step-stripping operation of the coaxial cable 12 is completed.

[0083] As described above, with the coaxial connector 80, it is not necessary to measure dimensions using a scale when removing a portion of the coating 16. This also reduces the work time required to attach the coaxial connector 80 to the coaxial cable 12.

[0084] Furthermore, in the coaxial connector 80, the first dimension line A7 and the second dimension line A8 are formed by the first protrusion 86 and the second protrusion 88. As a result, the first dimension line A7 and the second dimension line A8 are less likely to disappear even when the outer peripheral surface 58 is worn, compared to lines drawn on the outer peripheral surface 58.

[0085] [Modification] It goes without saying that the present invention is not limited to the above-described embodiments, and may be embodied in various different forms within the scope of the technical concept thereof.

[0086] The first dimension line A1, the second dimension line A2, the reference line B1, and the reference line B3 are not limited to being provided over the entire circumferential direction of the outer peripheral surface of the coaxial connector 30, 60, 70, or 80, but may be provided over a portion of the circumferential direction. When a reference portion is provided at the axial end of the coaxial connector, as in the case of end face 76, a flange portion may be provided at a location adjacent to the reference line of the coaxial connector. The flange portion may be used as an axial positioning portion for end face 12A.

[0087] The first dimension lines A1, A3, A7 and the second dimension lines A2, A4, A8 are not limited to being provided over the entire circumferential direction of the outer circumferential surface of the coaxial connectors 30, 60, 70, 80, but may be provided over a portion of the circumferential direction. The mark portion is not limited to having two marks (first mark and second mark), but may have one mark or three or more marks.

[0088] The reference line B2 may be provided on the D-cut surface 78B. Alternatively, the reference line B2 may be provided on the D-cut surface 78B, and the end surface 76 may function as a marking portion.

[0089] The reference portion and the mark portion may be stickers attached to the outer peripheral surface 58. That is, reference lines and dimension lines may be printed on stickers, and the stickers may be attached to the outer peripheral surface 58. When the reference portion and the mark portion are colored, the colors are not limited to a single color, and multiple colors may be mixed. [Explanation of symbols]

[0090] 12...coaxial cable, 12A...end face, 13...conductor portion, 14...inner conductor portion, 15...outer conductor portion, 16...coating portion, 17...insulator, 18...sheath, 20...mating connector, 22...outer electrode portion, 24...inner electrode portion, 26...hole portion, 30...coaxial connector, 32...connector housing, 34...mating portion, 36...nut member, 38...snap ring, 41...clamp nut, 42...fastening metal fitting, 43...washer, 44...gasket, 45...clamp, 46...pressing ring, 47...washer, 48...center pin, 49...first insulator, 51...second insulator, 52...tubular portion, 53...end face, 54...accommodating portion, 55...first stepped surface, 56...second stepped surface, 58...outer surface, 60...coaxial connector, 62...connector housing, 64... Groove, 66...first groove, 68...second groove, 70...coaxial connector, 72...connector housing, 74...tubular portion, 76...end face, 78...outer surface, 78A...curved surface, 78B...D-cut surface, 79...groove portion, 79A...first groove, 79B...second groove, 80...coaxial connector, 82...connector housing, 84...protrusion, 86...first protrusion, 88...second protrusion, A1...first dimension line , A2...second dimension line, A3...first dimension line, A4...second dimension line, A5...first dimension line, A6...second dimension line, A7...first dimension line, A8...second dimension line, B1...reference line, B2...reference line, B3...reference line, C...center axis line, d1...spacing, d2...spacing, G...top surface, K...cutter, P1...position to be cut, P2...position to be cut, SA...step peeling range, SB...step peeling range

Claims

1. A coaxial connector to be attached to a coaxial cable having a covering portion covering a conductor portion, a cylindrical portion provided at a tip end of the coaxial cable in the axial direction; a reference portion provided on the cylindrical portion for positioning a tip end of the coaxial cable in the axial direction; a mark portion provided on the cylindrical portion such that the distance between the mark portion and the reference portion in the axial direction is equal to the axial length of the step-stripping range of the coating portion, the mark portion indicating a cutting target position where the coating portion is to be cut when the tip of the coaxial cable is positioned on the reference portion; A coaxial connector having:

2. The mark portion is formed of a groove portion recessed from the outer peripheral surface of the cylindrical portion in a direction intersecting the axial direction.

2. The coaxial connector according to claim 1.

3. A flat surface is provided on a part of the outer circumferential surface of the cylindrical portion, At least one of the mark portion and the reference portion is provided on the flat portion.

3. The coaxial connector according to claim 2.

4. The mark portion is a protrusion protruding from the outer peripheral surface of the cylindrical portion in a direction intersecting the axial direction.

2. The coaxial connector according to claim 1.

5. The covering portion has an outer covering portion and an inner covering portion located more inward than the outer covering portion, the marking portion includes a first marking indicating the cutting position of the outer covering portion and a second marking indicating the cutting position of the inner covering portion; The coaxial connector according to any one of claims 1 to 4.

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