JP2008243686A - Coaxial connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a coaxial connector capable of suppressing radio wave loss and reflection, and capable of improving frequency characteristics. <P>SOLUTION: The coaxial connector 21 is equipped with an insulating base 26 arranged in contact with a printed circuit board. A substantially cylindrical conductive cover body 41 is mounted on the base 26. The cover body 41 has a ground contact mounted part 43 positioned adjacent to the printed circuit board 23. An insulator 61 is arranged and installed in the cover body 41, and a contact 71 is held by the insulator 61. A ground contact 72 is mounted on the ground contact mounted part 43. The ground contact mounted part 43 has a first groove 51 formed at the intermediate part in the axial direction of the cover body 41, and a second groove 52 formed at the other end part in the axial direction of the cover body 41. A ground contact 72 has a first engaging arm part 85 engaged with and connected to the first groove 51 and a second engaging arm part 92 engaged with and connected to the second groove 52. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a coaxial connector capable of suppressing loss and reflection of radio waves and improving frequency characteristics.

  Conventionally, as a coaxial connector such as a BNC connector for connecting a coaxial cable for transmitting a high frequency, for example, one shown in FIGS. 8 to 10 is known (for example, see Non-Patent Document 1).

  The coaxial connector shown in FIGS. 8 to 10 has an insulating base 3 having an insertion hole 1 and disposed in contact with the printed circuit board 2, and a plug connected to one end in the axial direction through the insertion hole 1. A flange portion 6 which has a portion 4 and has an earth contact attached portion 5 which is positioned away from the printed circuit board 2 on the other axial end side, and which is in contact with a peripheral edge portion of the insertion hole 1 of the base 3 at an intermediate portion in the axial direction. A substantially cylindrical conductive cover body 7 having an insulator, an insulator 8 fitted in the cover body 7, and a plug connection portion 11 held by the insulator 8 at one end side and the printed circuit board 2 at the other end side. A flat contact 13 having a circuit connection portion 12 connected to the circuit, and a ground contact 15 attached to the outer peripheral side of the ground contact attached portion 5 of the cover body 7.

The ground contact attached portion 5 of the cover body 7 has an engagement groove 16 formed along the circumferential direction of the cover body 7 on the outer peripheral surface of the cover body 7. Further, the ground contact 15 is engaged and connected to the engagement groove 16 of the ground contact mounting portion 5 and is substantially C-shaped to sandwich the peripheral portion of the insertion hole 1 of the base 3 with the flange portion 6 of the base 3. A pair of engaging arm portions 17 having a shape, and a circuit connection portion 18 that is positioned so as to be opposed to the circuit connection portion 12 of the contact 13 and is connected to the circuit of the printed circuit board 2.
[online], Emden Radio Industry Co., Ltd., [March 13, 2007 search], Internet <URL: http://www.emuden.com/products411/regular1-1.htm>

  However, in the conventional coaxial connector, as shown in FIG. 10, there is a comparatively large space 20 between the cover body 7 and the printed circuit board 2, and the circuit connection portion 12 of the contact 13 in the space 20. Therefore, there is a possibility that a radio wave having a high frequency escapes from the exposed part, resulting in a loss of the radio wave.

  In the conventional coaxial connector, the engagement groove 16 for engaging and connecting the ground contact 15 is located at a position away from the other end in the axial direction of the cover body 7 on the outer peripheral surface of the cover body 7, that is, the end on the printed circuit board 2 side. Since it is formed, there is a possibility that radio waves may be reflected at the portion on the other axial end side of the cover body 7.

  The present invention has been made in view of these points, and an object of the present invention is to provide a coaxial connector that can suppress loss and reflection of radio waves and improve frequency characteristics.

  The coaxial connector according to claim 1 has an insertion hole, has an insulating base disposed in contact with the printed circuit board, is inserted through the insertion hole, and has a plug connection portion on one end side in the axial direction. A substantially cylindrical shape having a ground contact mounting portion positioned in the vicinity of the printed circuit board on the other end side in the axial direction, and a flange portion in contact with the peripheral edge portion of the insertion hole of the base in the axial direction intermediate portion Conductive cover body, an insulator disposed in the cover body, held by the insulator, having a plug connection portion on one end side, and connected to the circuit of the printed circuit board on the other end side A contact having a circuit connection portion and a ground contact attached to the outer peripheral side of the ground contact mounting portion of the cover body, and the ground contact mounting portion is disposed on the outer peripheral surface of the cover body. The first groove formed along the circumferential direction of the cover body and the axially other end of the outer peripheral surface of the cover body are formed along the circumferential direction of the cover body, from the first groove toward the printed circuit board side. A first engaging arm portion that is engaged with and connected to the first groove and sandwiches a peripheral edge portion of the insertion hole of the base with the flange portion. And a second engagement arm portion that is engaged and connected to the second groove and has a circuit connection portion that is connected to the circuit of the printed circuit board on the distal end side.

  The coaxial connector according to claim 2 is the coaxial connector according to claim 1, wherein a through-hole penetrating the inner and outer surfaces of the cover body is formed in the second groove of the ground contact mounting portion, and the second engagement arm portion. Is inserted through the through-hole and supports the insulator so that the insulator does not escape from the cover body.

  The coaxial connector according to claim 3 is the coaxial connector according to claim 1 or 2, wherein the ground contact attached portion has a contact surface formed at the other axial end portion of the outer peripheral surface of the cover body, The earth contact has an abutting arm portion that is abutted and connected to the abutted surface and has a circuit connecting portion that is connected to the circuit of the printed circuit board on the tip side.

  A coaxial connector according to a fourth aspect is the coaxial connector according to the third aspect, wherein the ground contact has a pair of second engagement arm portions and one abutting arm portion, The circuit connection portions are arranged at substantially equal intervals on a virtual circle centered on the circuit connection portion of the contact.

  The coaxial connector according to claim 5 is the coaxial connector according to any one of claims 1 to 4, wherein the insulator is formed by coupling two insulator forming members to each other, and a contact is formed between the two insulator forming members. Is sandwiched between.

  According to the first aspect of the present invention, the ground contact attached portion of the cover body is located close to the printed circuit board, and the ground contact attached portion is formed on the outer peripheral surface of the cover body along the circumferential direction. A first groove and a second groove formed along the circumferential direction at the other axial end portion of the outer peripheral surface of the cover body and positioned closer to the printed circuit board than the first groove, and the ground contact is engaged with the first groove. A first engagement arm portion that is connected to the flange portion and sandwiches the peripheral edge portion of the insertion hole of the base, and a second engagement arm that is engaged and connected to the second groove and has a circuit connection portion formed on the distal end side Therefore, the loss and reflection of radio waves can be suppressed, and the frequency characteristics can be improved.

  According to the second aspect of the invention, the second engagement arm portion of the ground contact is inserted into the through hole of the second groove and supports the insulator so that the insulator does not come out of the cover body. It is possible to appropriately prevent the escape.

  According to the third aspect of the invention, since the ground contact has the contact arm portion in which the contact surface is contact-connected to the contact surface and the circuit connection portion is formed by bending at the tip end side, the frequency characteristics can be further improved. .

  According to the invention of claim 4, since the circuit connecting portions of the three arm portions are arranged at substantially equal intervals on a virtual circle centered on the circuit connecting portion of the contact, the frequency characteristics can be reliably improved. .

  According to the invention which concerns on Claim 5, the insulator is comprised by mutually connecting two insulator formation members, and a contact can be appropriately clamped between these two insulator formation members.

  An embodiment of a coaxial connector of the present invention will be described with reference to the drawings.

  1 to 4, reference numeral 21 denotes a coaxial connector. The coaxial connector 21 is, for example, a 75Ω BNC connector that can be arranged on the printed circuit board 23 at the same height as a 50Ω BNC connector (not shown). is there.

  The coaxial connector 21 includes a base 26 such as a body that is disposed in a state where the substrate contact surface 25 is in contact with the printed circuit board 23. The base 26 is integrally formed of an insulating synthetic resin or the like.

  The base 26 has a substantially plate-like main body portion 27, and a substantially circular insertion hole 28 is formed in the main body portion 27 so as to penetrate the main body portion 27 in the thickness direction. A recess 29 for preventing rotation is formed on the inner peripheral surface facing the insertion hole 28 of the main body 27. In addition, a pair of protruding plate portions 31 and a substantially cylindrical protruding column portion 32 that face each other away from the main body portion 27 protrude toward the printed circuit board 23 side, and the front end surface and the protruding column of both protruding plate portions 31 A substrate abutting surface 25 that is an abutting portion that abuts against the printed circuit board 23 is constituted by the tip surface of the portion 32. Further, a shield contact attached hole 33 is formed at the distal end surface of the protruding column portion 32, and a conductive metal plate-like shield contact 34 is attached to the shield contact attached hole 33. The shield contact 34 has a flat circuit connecting portion 35 that is a lead portion that penetrates the printed circuit board 23 and is connected to a circuit (not shown) of the printed circuit board 23 by soldering. In addition, a screw hole 37 into which a mounting screw (not shown) for attaching the base 26 to a case (not shown) of an electric device or the like is screwed is formed on the base end surface of the protruding column portion 32. Yes. In addition, the shield contact 34 is formed with a pair of contact portions 38 that come into contact with the tip side of the mounting screw screwed into the screw hole 37.

  Further, the coaxial connector 21 includes a cover body 41 such as a shell having a substantially cylindrical shape with openings on both ends attached to the base 26 in a state of being inserted into the insertion hole 28 of the base 26. The cover body 41 is integrally formed of a conductive metal or the like.

  As shown in FIG. 5, the cover body 41 has a plug connection portion 42 to which a plug (not shown) of a coaxial cable is connected on one end side in the axial direction, and the other end side in the axial direction, that is, a printed circuit board. A ground contact mounting portion 43 located close to the printed circuit board 23 is provided on the end side on the 23 side, and protrudes radially outward at, for example, substantially the center in the axial direction, which is an intermediate portion in the axial direction. A flange portion 44 that abuts on the peripheral edge portion of the insertion hole 28 is provided.

  As shown in FIG. 3, the ground contact attached portion 43 protrudes from the main body portion 27 of the base 26 toward the printed circuit board 23, and the ground contact attached portion 43 and the printed circuit board 23 are connected to each other. Although there is a slight gap between them, for example, although not shown in the figure, the tip of the ground contact attached portion, that is, the other axial end of the cover body 41 may be in contact with the printed circuit board 23 without the gap.

  On the outer peripheral surface of the plug connecting portion 42, a pair of protrusions 46 that are engaged with the plug of the coaxial cable are integrally projected. On the inner peripheral surface of the plug connecting portion 42, an annular retaining step portion 47 is integrally projected (see FIG. 4).

  The ground contact attached portion 43 includes a first groove 51 formed on both sides of the outer peripheral surface of the cover body 41 along the circumferential direction of the cover body 41, and the other axial end portion on both sides of the outer peripheral surface of the cover body 41, that is, ground. The contact mounting portion 43 has a second groove 52 formed along the circumferential direction of the cover body 41 and positioned on the printed circuit board 23 side from the first groove 51. That is, two stages of the first groove 51 and the second groove 52 arranged in the axial direction are formed on the outer peripheral surface of the ground contact attached portion 43. Each second groove 52 is formed, for example, in the vicinity of the other end in the axial direction of the cover body 41, and a through-hole 53 that penetrates the inner and outer surfaces of the cover body 41 is formed on the groove bottom surface 52 a of each second groove 52. An opening is formed in the shape of a long hole in the circumferential direction of 41. The ground contact attached portion 43 has a flat surface portion 54 along the radial direction of the cover body 41. The flat surface portion 54 engages with the concave portion 29 of the base 26 to the base 26 of the cover body 41. A rectangular parallelepiped engaging convex portion 55 that restricts rotation is integrally projected, and the engaging convex portion 55 is connected to the flange portion 44. A portion of the flat surface portion 54 that is located at the other axial end of the cover body 41 is a contacted surface 56.

  Further, the coaxial connector 21 includes an insulator 61 which is an insulator fitted and disposed in the cover body 41. The insulator 61 is configured by, for example, two insulating members 62 that are integrally formed of an insulating synthetic resin or the like being joined together by fitting. Each insulator forming member 62 has a plurality of convex portions 62a and concave portions 62b, and the two insulator forming members 62 are coupled to each other by fitting the convex portions 62a and the concave portions 62b.

  The insulator 61 has a longitudinal and cylindrical contact holding portion 63 having a longitudinal direction in the axial direction of the cover body 41. Circular contact protrusions 64, 65, 66 protruding from the outer peripheral surface of the contact holding part 63 are integrally projected on one end part in the longitudinal direction, the central part in the longitudinal direction, and the other end part in the longitudinal direction of the contact holding part 63. The outer peripheral surfaces of these protrusions 64, 65, 66 are in contact with the inner peripheral surface of the cover body 41. Between the contact holding portion 63 and the protrusions 64 and 66, a substantially triangular rib portion 67 is provided. Further, in the cover body 41, recesses 68 are formed on both sides of the surface of the protrusion 66 that is located in the vicinity of the other end in the axial direction of the cover body 41 and faces the printed circuit board 23 facing the printed circuit board 23. ing. Although not shown in the drawings, a recess for preventing rotation is formed on the inner peripheral surface of the central portion in the longitudinal direction of the contact holding portion 63.

  Further, the coaxial connector 21 is held by the contact holding portion 63 of the insulator 61, that is, the contact 71 sandwiched between both insulator forming members 62 and the cover body 41 on the outer peripheral side of the ground contact attached portion 43 of the cover body 41. And an earth contact 72 attached from a direction orthogonal to the axial direction. Both the contact 71 and the ground contact 72 are integrally formed of a conductive metal or the like.

  The contact 71 is a rod-shaped member having a longer dimension than the contact holding portion 63 of the insulator 61, and includes a cylindrical portion 73, a truncated cone portion 74, and a flat plate portion 75. A circular engaging convex portion 76 that engages with the concave portion of the insulator 61 and restricts the rotation of the contact 71 with respect to the insulator 61 is integrally projected on the outer peripheral surface of the central portion in the longitudinal direction of the cylindrical portion 73.

  One end side in the longitudinal direction of the contact 71 protrudes from the one end opening 63a of the contact holding portion 63 to the outside of the insulator 61, and this protruding portion serves as a plug connection portion 77 to which a coaxial cable plug (not shown) is connected. The plug connecting portion 77 is located in the cover body 41 (see FIG. 4), and long holes 78 are formed on both sides of the plug connecting portion 77 along the longitudinal direction of the contact 71. Further, the other end in the longitudinal direction of the contact 71 extends from the rectangular other end opening 63b of the contact holding portion 63 which opens at the other end position in the axial direction of the cover body 41, that is, at the tip end position of the ground contact attached portion 43. Projecting to the outside and the cover body 41. The flat plate portion 75 that is the protruding portion is a flat circuit connection portion 79 that penetrates the printed circuit board 23 and is connected to the circuit of the printed circuit board 23 by soldering.

  As shown in FIGS. 6 and 7, the earth contact 72 has a substantially rectangular main body plate portion 81, and one end of the main body plate portion 81 in the short direction is folded at a right angle at an intermediate portion. A curved plate portion 82 is integrally provided. The bent plate portion 82 is positioned so as to be spaced apart from each other and engaged with and connected to the first groove 51 of the ground contact attached portion 43 of the cover body 41 via the shield plate 83. A pair of first engagement arm portions 85 that are substantially C-shaped and sandwich the peripheral edge of the insertion hole 28 of the base 26 are integrally provided. That is, the two first engagement arm portions 85 protrude from the bent plate portion 82 toward the cover body 41 side. An arcuate engagement edge 86 that fits and engages with the first groove 51 of the cover body 41 is formed at the inner edge of each first engagement arm 85, and the first end of the engagement edge 86 is a first end. A hooking claw portion 87 that is hooked on the groove bottom surface 51a of the groove 51 and is prevented from coming off is formed. A substantially hemispherical convex portion 88 that abuts on the surface of the main body 27 of the base 26 on the printed circuit board 23 side is integrally provided at the base end portion of each first engagement arm portion 85.

  Further, both ends in the longitudinal direction of the other end in the short direction of the main body plate portion 81 are positioned to be opposed to each other and engaged with and connected to the second groove 52 of the ground contact attached portion 43 of the cover body 41. A pair of second engagement arm portions 92 on both sides formed by bending a plate-like circuit connection portion 91 penetrating the printed circuit board 23 and connected to the circuit of the printed circuit board 23 by soldering are integrally provided. It has been. That is, the insulator 61 is inserted into the through hole 53 of the second groove 52 from both sides of the other end portion in the short direction of the main body plate portion 81 and engaged with the recess portion 68, and the insulator 61 is inserted into the printed circuit board from the cover body 41. Two second engagement arm portions 92 that are supported so as not to come out to the 23 side protrude toward the cover body 41 side. Each second engagement arm portion 92 includes a first plate portion 93 on the proximal end side and a second plate portion 94 on the distal end side, and the second plate portion 94 serves as a circuit connection portion 91. On the inner edge of the first plate portion 93, a linear support edge portion 95 is formed which is inserted into the cover body 41 from the through hole 53 and supports the insulator 61 by engagement with the recess portion 68. A hooking claw portion 96 that is hooked on the groove bottom surface 52a of the second groove 52 and prevents the second groove 52 from coming off is formed at the tip of the second groove 52.

  Furthermore, the longitudinally central portion at the other short end of the main body plate 81 is in contact with and connected to the abutted surface 56 at the other axial end of the cover body 41 and penetrates the printed circuit board 23 to the front end. Then, a single abutting arm portion 98 formed by bending a flat circuit connecting portion 97 connected to the circuit of the printed circuit board 23 by soldering is integrally provided. That is, one abutting arm portion 98 projects toward the cover body 41 from the position between the second engaging arm portions 92 at the other end in the short direction of the main body plate portion 81. The contact arm portion 98 includes a first plate portion 99 on the proximal end side and a second plate portion 100 on the distal end side, and the second plate portion 100 serves as a circuit connection portion 97. Further, the entire surface on the cover body 41 side of the wide base end portion 100a of the second plate portion 100 serves as a contact surface 101 that contacts the contacted surface 56 of the ground contact attached portion 43 in a planar shape. Yes.

  As described above, the ground contact 72 has a pair of second engaging arm portions 92 and one abutting arm portion 98, and circuit connecting portions 91, 91, and 98 of the three arm portions 92, 92, 98. 97 are arranged on a virtual circle centered on the circuit connection portion 79 of the contact 71 at substantially equal intervals, that is, at intervals of approximately 120 degrees.

  Next, the operation and the like of the above embodiment will be described.

  When assembling the coaxial connector 21, first, the contact 71 is placed on one insulator forming member 62, and then coupled to the one insulator forming member 62 so as to abut the other insulator forming member 62. The contact 71 is held by the insulator forming member 62.

  Next, the insulator 61 holding the contact 71 is fitted into the cover body 41 from the other end opening in the axial direction of the cover body 41, and the protrusion 64 at the distal end side in the insertion direction of the insulator 61 is connected to the inner peripheral side of the cover body 41. It abuts on the stepped portion 47.

  Subsequently, after placing the shield plate 83 on the base 26, the cover body 41 is inserted into the insertion hole 28 of the base 26, and the shield plate 83 is inserted into the peripheral edge of the flange portion 44 of the cover body 41 and the insertion hole 28 of the base 26. Hold between the parts. Further, the shield contact 34 is inserted into the shield contact mounting hole 33 of the protruding column portion 32 of the base 26.

  Next, the ground contact 72 is inserted between the projecting plate portions 31 of the base 26 along the two-step grooves 51 and 52 and attached to the ground contact attached portion 43 of the cover body 41. That is, the pair of first engagement arm portions 85 of the ground contact 72 is engaged and connected to the first groove 51 of the cover body 41, and the pair of second engagement arm portions 92 of the ground contact 72 is connected to the second of the cover body 41. The groove 52 is engaged and connected, and the contact arm portion 98 of the ground contact 72 is contact-connected to the contacted surface 56 of the cover body 41.

  When the pair of first engagement arm portions 85 are engaged and connected to the first groove 51, the insertion hole 28 of the base 26 is interposed between the first engagement arm portions 85 and the flange portion 44 of the cover body 41. The cover body 41 is fixedly attached to the base 26.

  Further, when the pair of second engagement arm portions 92 are engaged and connected to the second groove 52, the insulator 61 is supported by the support edge portions 95 of both the second engagement arm portions 92. That is, one end portion of the insulator 61 in the longitudinal direction is supported by the step portion 47 of the cover body 41, and the other end portion of the insulator 61 in the longitudinal direction is supported by the support edge portion 95 of the second engagement arm portion 92 of the earth contact 72. The insulator 61 is prevented from coming out of the cover body 41.

  The assembled coaxial connector 21 is attached to a case of an electrical device or the like with a mounting screw or the like, and a coaxial cable plug is connected to the attached coaxial connector 21.

  According to the coaxial connector 21, the ground contact attached portion 43 of the cover body 41 extends to the vicinity of the printed circuit board 23 and is located close to the printed circuit board 23. A pair of first engaging arm portions 85 in which the two-step grooves 51 and 52 and the abutted surface 56 are formed in the direction and the ground contact 72 is engaged and connected to the first groove 51 and the end positions of the cover body 41 And a pair of second engaging arm portions 92 engaged and connected to the second groove 52 and an abutting arm portion 98 abuttingly connected to the abutted surface 56 at the end position of the cover body 41. Compared with the conventional configuration, the loss and reflection of radio waves can be effectively suppressed, and the frequency characteristics can be improved. Thus, for example, a standing wave ratio is 1.5 or less in a high frequency band of 3 GHz.

  Further, the pair of second engagement arm portions 92 of the ground contact 72 is inserted into the through hole 53 of the second groove 52 and supports the insulator 61 so that the insulator 61 does not come out of the cover body 41. It is possible to appropriately prevent the cover body 41 from slipping out, and it is not necessary to crimp the end of the cover body 41 to prevent the insulator 61 from slipping out, thereby improving the assemblability.

  The coaxial connector 21 is not limited to a one-pin structure in which one insertion hole 28 is provided in the base 26 and one cover body 41 is inserted into the insertion hole 28. A multi-pin structure in which a through hole is provided and a cover body is inserted into each through hole may be used.

  The ground contact 72 is not limited to the configuration having the three arm portions 92, 92, 98 including the pair of second engagement arm portions 92 and one abutting arm portion 98. For example, the ground contact 72 A configuration having only a pair of second engagement arm portions 92, a configuration having only one of the pair of second engagement arm portions 92, a configuration having only one contact arm portion 98, or the like may be employed.

It is a disassembled perspective view of the coaxial connector of one embodiment of this invention. It is a perspective view of a coaxial connector same as the above. It is a side view of a coaxial connector same as the above. It is AA sectional drawing of FIG. It is a perspective view of the cover body of a coaxial connector same as the above. It is a perspective view of the earth contact of a coaxial connector same as the above. It is a perspective view of the earth contact of a coaxial connector same as the above. It is a disassembled perspective view of the conventional coaxial connector. It is a perspective view of a coaxial connector same as the above. It is a side view of a coaxial connector same as the above.

Explanation of symbols

21 Coaxial connector
23 Printed circuit boards
26 base
28 Insertion hole
41 Cover body
42 Plug connection
43 Ground contact mounting part
44 Flange
51 1st groove
52 Second groove
53 Through hole
56 Contact surface
61 Insulator
62 Insulator forming member
71 Contacts
72 Earth contact
77 Plug connection
79 Circuit connection
85 First engagement arm
91 Circuit connection
92 Second engagement arm
97 Circuit connection
98 Contact arm

Claims (5)

An insulating base having an insertion hole and disposed in contact with the printed circuit board;
It is inserted through the insertion hole, has a plug connection portion on one axial end side, has an earth contact attached portion located in the vicinity of the printed circuit board on the other axial end side, and A substantially cylindrical conductive cover body having a flange portion in contact with the peripheral edge portion of the insertion hole of the base;
An insulator disposed in the cover body;
A contact held by this insulator, having a plug connection part on one end side, and having a circuit connection part connected to the circuit of the printed circuit board on the other end side;
An earth contact attached to the outer peripheral side of the ground contact attached portion of the cover body,
The ground contact mounting portion is
A first groove formed on the outer peripheral surface of the cover body along the circumferential direction of the cover body;
Formed along the circumferential direction of the cover body at the other axial end of the outer peripheral surface of the cover body, and having a second groove positioned on the printed circuit board side from the first groove,
The earth contact is
A first engagement arm portion that is engaged and connected to the first groove and sandwiches a peripheral edge portion of the insertion hole of the base with the flange portion;
A coaxial connector comprising: a second engagement arm portion engaged with and connected to the second groove and having a circuit connection portion formed on the tip side thereof connected to a circuit of the printed circuit board. A through-hole penetrating the inner and outer surfaces of the cover body is formed in the second groove of the ground contact attached portion,
The coaxial connector according to claim 1, wherein the second engagement arm portion is inserted through the through hole and supports the insulator so that the insulator does not come out of the cover body. The ground contact attached portion has a contact surface formed at the other axial end of the outer peripheral surface of the cover body,
The ground contact has an abutting arm portion that is abutted and connected to the abutted surface and has a circuit connecting portion that is connected to a circuit of a printed circuit board on a distal end side. The coaxial connector as described. The ground contact has a pair of second engaging arm portions and one abutting arm portion,
The coaxial connector according to claim 3, wherein the circuit connection portions of the three arm portions are arranged at substantially equal intervals on a virtual circle centered on the circuit connection portion of the contact. The insulator is configured by joining two insulator forming members to each other,
The coaxial connector according to any one of claims 1 to 4, wherein the contact is sandwiched between the two insulator forming members.

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