Coaxial connector

Abstract

The present invention reduces restrictions with respect to the mounting of a coaxial connector.　A coaxial connector (10) comprises: a core wire (15); and a housing (11) which holds the core wire (15) and to which an attachment object (30) is attached. The housing (11) is configured so that in the housing (11), a region facing the attachment object (30) and a region for holding the core wire (15) are positioned on different planes.

Description

Coaxial Connectors

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

[0002] Conventionally, as disclosed in Patent Document 1, a printed wiring board for mounting a coaxial connector and an integrated circuit has been proposed.

[0003] JP 2014-049877 A

[0004] However, the coaxial connector must be fitted to the edge of the printed wiring board, which places restrictions on installation.

[0005] Therefore, one object of the present invention is to reduce the constraints on the installation of coaxial connectors. Other objects of the present invention will become apparent from the description of this specification.

[0006] One aspect of the present invention is a coaxial connector comprising a core wire and a housing that holds the core wire and to which an object to be attached is attached, wherein the area of ​​the housing that faces the object to be attached and the area that holds the core wire are located on different planes.

[0007] According to the above aspect of the present invention, it is possible to reduce restrictions on the installation of the coaxial connector.

[0008] 7 is a perspective view of the mounting structure in the first embodiment, as seen from above and behind; FIG. 8 is a cross-sectional perspective view of the coaxial connector in the first embodiment; FIG. 9 is an exploded perspective view of the coaxial connector in the first embodiment; FIG. 10 is a perspective view of the coaxial connector in the first embodiment, as seen from above and behind; FIG. 11 is a perspective view of the coaxial connector in the first embodiment, as seen from above and behind; FIG. 12 is a perspective view of the coaxial connector in the first embodiment, as seen from above and behind; FIG. 13 is a perspective view of the coaxial connector in the second embodiment, as seen from below and behind; FIG. 14 is a perspective view of a coaxial connector having a first recess that is smaller than that of the coaxial connector in FIG. 7, as seen from below and behind; FIG. 15 is a perspective view of the coaxial connector in the third embodiment, as seen from below and behind.

[0009] The present embodiment will be described below with reference to the drawings. Note that the embodiments are not limited to the following first to third embodiments. Furthermore, the content described in one embodiment is, in principle, also applicable to the other embodiments. Furthermore, each embodiment and each modified example can be combined as appropriate.

[0010] In the following, for the purpose of explaining directions, one direction (front-to-back direction) on the surface of the coaxial connector 10 facing the attachment object 30 is defined as the x-direction, the left-to-right direction perpendicular to the x-direction on that surface as the y-direction, and the approximately vertical direction perpendicular to the x- and y-directions as the z-direction. Furthermore, in Figures 1 to 9, the directions indicated by the arrows on the x, y, and z-axes are defined as the forward, rightward, and upward directions, respectively.

[0011] (Mounting Structure) As shown in FIG. 1, the coaxial connector 10 of this embodiment is mounted on the surface of an object 30 to which it is to be attached.

[0012] (Coaxial Connector 10) The coaxial connector 10 is a plug-side coaxial connector of the SMP (Sub Miniature Push-on) or SMPM (Sub Miniature Push-on Mini) type. As shown in Fig. 2, the coaxial connector 10 has a housing 11, a core wire 15, and contacts 16. The coaxial connector 10 of the first embodiment further has a connection portion 13 and an insulating portion 17.

[0013] (Housing 11) The housing 11 includes a base 11a and a holding portion 11b. The housing 11 is made of a conductive material such as brass. The base 11a and the holding portion 11b are integrally formed. Here, "integrally formed" also includes a configuration in which the base 11a and the holding portion 11b are formed as separate bodies and connected by welding or the like.

[0014] (Base 11a) The base 11a holds the holding portion 11b. The base 11a has a mounting surface (lower surface) 11a1, i.e., a surface facing the mounting object 30. A first recess 11a2 recessed upward in the z direction is formed in the mounting surface 11a1. The first recess 11a2 is filled with a bonding material 20 such as cream solder. FIG. 2 shows an example in which a partial region of the first recess 11a2 is filled with the bonding material 20. The amount of bonding material 20 filled in the first recess 11a2 is adjusted so that the bonding material 20 melted by heat is sufficiently distributed over the region of the mounting surface 11a1 of the base 11a that contacts the mounting object 30.

[0015] 3 and 4, a passage 11a3 communicating with the first recess 11a2 is formed in at least one side surface of the base 11a. In the first embodiment, the passages 11a3 are formed in the left and right side surfaces of the base 11a. The passages 11a3 are used as a discharge path for thermally expanded air and vaporized flux during reflow soldering.

[0016] 5 and 6, a first notch 11a4 is formed on the back surface of the base 11a. The first notch 11a4 communicates with a hole H, which will be described later. The first notch 11a4 is formed so as to expose the tip end of the contact 16 extending from the core wire 15 without contacting the contact 16. The first recess 11a2 and the passage 11a3 do not communicate with the hole H and the first notch 11a4.

[0017] (Retaining Portion 11b) The retaining portion 11b retains the core wire 15 via the insulating portion 17. A fitting groove 11b1 into which the first insulator 17a of the insulating portion 17 is fitted is formed in the region of the retaining portion 11b into which the first insulator 17a is inserted. The upper surface of the retaining portion 11b, i.e., the slope opposite the mounting surface 11a1 of the housing 11 in the z direction, has a semi-cylindrical shape. A second notch 11b2 is formed in the upper surface of the retaining portion 11b. The second notch 11b2 is used as a latching area for a clip (not shown) when temporarily fastening the coaxial connector 10 to the mounting object 30 prior to reflow soldering. The second notch 11b2 has a surface approximately perpendicular to the z direction, and a second recess 11b3 recessed downward in the z direction is formed in the surface approximately perpendicular to the z direction. The second recess 11b3 does not communicate with the hole H or the first recess 11a2. The second recess 11b3 is used for positioning the clip, etc.

[0018] (Hole H) Holes H are formed in the region of the base 11a where the contacts 16 are located and in the region of the holding portion 11b that holds the core wire 15. The holes H penetrate the housing 11 between a region that is forward in the x direction and upward in the z direction, and a region that is rearward in the x direction and downward in the z direction. The core wire 15 and the insulating portion 17 are inserted into the holes H. The core wire 15 is held by the holding portion 11b via the insulating portion 17, with the direction in which the core wire 15 extends forming an inclination angle θ1 (0 degrees < θ1 < 90 degrees) with the xy plane.

[0019] (Connection portion 13) The connection portion 13 is attached to the holding portion 11b at a position forward in the x direction and upward in the z direction. The connection portion 13 has a generally cylindrical shape that covers the side of the tip portion of the core wire 15 at a position forward in the x direction and upward in the z direction. The connection portion 13 connects to the outer conductor of the jack-side coaxial connector of the coaxial cable (not shown). The connection portion 13 is made of a conductive material such as a copper alloy.

[0020] (Core Wire 15) The core wire 15 is made of a conductive material such as phosphor bronze and is arranged straight in the hole H of the holding portion 11b. One end of the core wire 15 (the tip end in the front in the x direction and upper in the z direction) is connected to the inner conductor (female-side center contact) of the jack-side coaxial connector of the coaxial cable (not shown). A contact 16 is formed on the other end of the core wire 15 (the tip end in the rear in the x direction and lower in the z direction). The side of the core wire 15 is covered with an insulating portion 17. However, one end of the core wire 15 (the tip end in the front in the x direction and upper in the z direction) is not covered by the insulating portion 17 and is exposed, extending to the connection portion 13.

[0021] (Contacts 16) The contacts 16 are thinner than the core wire 15 and are made of a conductive material such as phosphor bronze. The contacts 16 extend from the other end of the core wire 15 (the tip end rearward in the x-direction and downward in the z-direction) further rearward in the x-direction and downward in the z-direction. The contacts 16 are exposed without being covered by the insulating portion 17 and have a tapered shape that narrows toward the tip. The tip end of the contact 16 contacts the signal line 31 of the attachment object 30. The contacts 16 extend in the same direction as the core wire 15. However, when the coaxial connector 10 is attached to the attachment object 30, the area of ​​the contact 16 that contacts the attachment object 30 is elastically deformed and bent by the attachment object 30.

[0022] The core wire 15 and the contact 16 are integrally formed. Here, integral formation includes a configuration in which the core wire 15 and the contact 16 are formed as separate bodies and connected by welding or the like.

[0023] (Insulating portion 17) The insulating portion 17 is made of an insulating material such as rubber or Teflon (registered trademark), and includes a first insulator 17a and a second insulator 17b. The first insulator 17a covers the side of the core wire 15 in a region forward in the x direction and above in the z direction. The second insulator 17b covers the side of the core wire 15 in a region rearward in the x direction and below in the z direction. The first insulator 17a prevents the core wire 15 from becoming electrically connected to the housing 11 or the connecting portion 13. The second insulator 17b prevents the core wire 15 from becoming electrically connected to the housing 11.

[0024] (Attachment object 30) The attachment object 30 is a flexible substrate made of an insulating film or the like. A signal line 31 made of a conductive material is formed on the surface of the attachment object 30. An end of the signal line 31 is formed in an area of ​​the attachment object 30 that comes into contact with the contact 16 of the coaxial connector 10. A ground pattern is formed in an area of ​​the attachment object 30 that comes into contact with the attachment surface 11a1.

[0025] (Positional Relationship Between Housing 11 and Core Wire 15) The housing 11 includes a region (mounting surface 11a1) of the housing 11 that faces the attachment object 30 and a region of the housing 11 that holds the core wire 15, and these regions are located on different planes. Specifically, as shown in Fig. 2 , the region of the housing 11 that faces the attachment object 30 (mounting surface 11a1) has a surface parallel to the xy plane, and an imaginary plane P that includes the region of the housing 11 that holds the core wire 15 has another surface that is not parallel to the xy plane.

[0026] The area of ​​the housing 11 facing the attachment object 30 (attachment surface 11a1) preferably extends in a direction inclined by an inclination angle θ1 with respect to the extension direction of the core wire 15 held in the housing 11. In this case, a plane P including the area of ​​the housing 11 that holds the core wire 15 has a surface that forms a predetermined inclination angle θ1 with the xy plane.

[0027] (Assembly Procedure of Coaxial Connector 10) Next, the assembly procedure of the coaxial connector 10 will be described. The first recess 11a2 is filled with the joining member 20 in advance. However, filling the first recess 11a2 with the joining member 20 may be performed in a later process, such as after fitting the connection portion 13 into the holding portion 11b. The first insulator 17a is fitted into the core wire 15 in front of the x-direction and above the z-direction. The second insulator 17b is fitted into the core wire 15 in back of the x-direction and above the z-direction. As a result, the area of ​​the core wire 15 other than one end is covered by the insulating portion 17. One end of the core wire 15 (the tip end in front of the x-direction and above the z-direction) and the contact 16 are exposed from the insulating portion 17.

[0028] The insulating portion 17, which holds the core wire 15 and the contact 16, is fitted into the hole H. The area of ​​the second insulator 17b that protrudes from the mounting surface 11a1 is cut away. However, prior to fitting, the lower end of the second insulator 17b may be formed in a shape that does not protrude downward in the z direction from the mounting surface 11a1. The connecting portion 13 is fitted into the holding portion 11b. This completes the coaxial connector 10 of the first embodiment.

[0029] (Procedure for Fixing the Coaxial Connector 10 to the Mounting Object 30) Next, a procedure for fixing the coaxial connector 10 to the mounting object 30 will be described. The coaxial connector 10 is assembled in advance. Furthermore, a signal line 31 and a ground pattern are formed on the mounting object 30. The coaxial connector 10 is brought close to the mounting object 30 so that the tip ends of the contacts 16 contact the ends of the signal lines 31 of the mounting object 30 and the mounting surface 11a1 contacts the ground pattern of the mounting object 30. The second notch 11b2 of the holding portion 11b and the mounting object 30 are clamped by the clip. The clamping of the clip temporarily fastens the coaxial connector 10 and the mounting object 30. In this temporarily fastened state, the coaxial connector 10 and the mounting object 30 are placed in a reflow furnace. The heat in the reflow furnace melts the bonding material 20 filled in the first recess 11a2 and penetrates between the mounting surface 11a1 and the ground pattern of the mounting object 30, joining the base 11a and the mounting object 30. Air that has thermally expanded in the space between the first recess 11a2 and the mounting object 30 and vaporized flux are discharged through the passage 11a3. If there are multiple coaxial connectors 10, each coaxial connector 10 is joined to the mounting object 30. This completes the fixation of the coaxial connector 10 of the first embodiment to the mounting object 30.

[0030] (Effect of the area facing the attachment object 30 and the area holding the core wire 15 being located on different planes) Since the area of ​​the housing facing the attachment object 30 and the area holding the core wire 15 are located on different planes, the coaxial connector 10 can be positioned in various positions on the attachment object 30, reducing installation constraints.

[0031] (Effect of the region facing the attachment object 30 extending in a direction inclined by the inclination angle θ1 with respect to the extension direction of the core wire 15) If the core wire 15 is perpendicular to the attachment surface 11a1, adverse effects on electrical characteristics such as transmission path reflection may occur. However, if the core wire 15 is held at an inclination that is gentler than perpendicular, adverse electrical effects such as transmission path reflection are less likely to occur.

[0032] (Advantages of surface bonding at the mounting surface 11a1) Compared to bonding at lines or points, the bonding area is larger and stronger. Therefore, even if an external force is applied, the bonding is less likely to come apart. Compared to bonding in which protruding areas are provided around the housing 11 for fastening screws or the like, the housing 11 can be made smaller.

[0033] (Effect of filling the first recess 11a2 with the joining member 20) By providing the first recess 11a2, the coaxial connector 10 can be made lighter than a configuration in which the first recess 11a2 is not provided, and it can also be used as a storage location for the joining member 20.

[0034] (Effect of Providing the Passage 11 a 3) The passage 11 a 3 can be utilized as a discharge path from the area between the first recess 11 a 2 and the attachment object 30 .

[0035] (Effect of Providing First Notch 11a4) The first notch 11a4 makes it possible to form an electrical isolation space between the base 11a and the contact 16. When attaching the coaxial connector 10 to an attachment object 30, alignment can be easily performed by aligning the contact 16, which is visible from the outside, with the signal line 31 via the first notch 11a4.

[0036] (Effect of Providing Second Notch 11b2) Even in an inclined region, the coaxial connector 10 and the attachment object 30 can be easily temporarily fastened together by clamping with a clip or the like.

[0037] (Effect of connecting the contact 16 to the signal line 31 of the attachment object 30 in a deflected state) Electrical connection is possible by the reaction force of the deflection, without using joining such as soldering.

[0038] (Effects of applying the coaxial connector 10 to an SMP connector, etc.) The small coaxial connector 10 can be easily attached to the attachment object 30. In particular, when multiple coaxial connectors 10 are arranged in close proximity, the multiple coaxial connectors 10 can be easily attached to the attachment object 30. Electrical connection between the contacts 16 and the signal lines of the attachment object 30 can be made without using joining such as hand soldering. This allows the lines through which signals flow to be made thinner, thereby suppressing degradation of electrical characteristics.

[0039] (Example of Application of Shape of First Recess 11a2) In the first embodiment, an example was described in which the first recess 11a2 has a relatively complex shape with unevenness formed inside. However, the shape of the first recess 11a2 is not limited thereto, and it may have a simple shape as shown in FIGS. 7 and 8 (Second Embodiment). In the second embodiment, a first recess 11a2 having a substantially rectangular parallelepiped shape is shown as an example of a simple shape. The size of the first recess 11a2 is preferably determined based on the area of ​​the mounting surface 11a1 required for joining to the mounting target 30, the volume of the first recess 11a2 required to fill the joining member 20, and the like. FIG. 8 shows an example in which a first recess 11a2 having a smaller volume than the first recess 11a2 of FIG. 7 is formed.

[0040] (Application example of mounting surface 11a1 of base 11a) In the first and second embodiments, the mounting surface 11a1 does not have a structure for preventing the intrusion of the bonding member 20 between the first recess 11a2 and the lower end region of the hole H. However, as shown in Fig. 9, a groove region 11a5 may be formed in the mounting surface 11a1 between the first recess 11a2 and the hole H (third embodiment, see Fig. 9). The groove region 11a5 surrounds the first cutout 11a4, the contact 16, the lower end region of the second insulator 17b, and the lower end region of the hole H.

[0041] (Effect of Providing Groove Region 11a5) Groove region 11a5 restricts the flow of joining member 20, making it difficult for joining member 20 to spread beyond groove region 11a5. As a result, joining member 20 is less likely to enter the region surrounded by groove region 11a5 on mounting surface 11a1, and it is possible to prevent mismatching of characteristic impedance caused by a change in the gap between the region where the ground pattern is located and core wire 15.

[0042] (Application Example of the Position of the Passage 11a3) In the first embodiment, the example in which the passage 11a3 is formed on the left and right sides of the base 11a has been described. However, the position in which the passage 11a3 is formed is not limited to the left and right sides of the base 11a, and the passage 11a3 may be formed in another location, for example, on the front surface of the base 11a, as shown in Figures 7 to 9.

[0043] (Application Example 1 of Coaxial Connector 10) In the first to third embodiments, the coaxial connector 10 has been described as an SMP connector or an SMPM connector. A configuration in which the housing 11 holds the core wire 15 in a state in which the area facing the attachment object 30 (mounting surface 11a1) and the area holding the core wire 15 are located on different planes is likely to be effective when used with a small coaxial connector 10 such as an SMPM connector. However, the coaxial connector 10 is not limited to an SMP connector or an SMPM connector, and may be another coaxial connector.

[0044] (Application Example 2 of Coaxial Connector 10) In the first to third embodiments, the coaxial connector 10 is a plug-side coaxial connector. However, the coaxial connector 10 may be a jack-side coaxial connector.

[0045] (Application Example 3 of Coaxial Connector 10) In the first to third embodiments, examples have been described in which two coaxial connectors 10 are attached to the attachment object 30. However, the number of coaxial connectors 10 attached to the attachment object 30 is not limited to two.

[0046] (Application Example 4 of Coaxial Connector 10) In the first to third embodiments, an example has been described in which the mounting surface 11a1 of the base 11a of the housing 11 is the area of ​​the housing 11 that faces the mounting object 30. However, the area of ​​the housing 11 that faces the mounting object 30 is not limited to being configured in a planar shape, and may be configured in a linear or dotted shape.

[0047] (Application Example 5 of Coaxial Connector 10) In the first to third embodiments, examples have been described in which the reaction force of the flexure of the contacts 16 is used to connect to the signal wires 31 of the attachment object 30. However, the connection between the contacts 16 and the signal wires 31 may be achieved by bonding or the like instead of or in addition to the reaction force of the flexure.

[0048] (Application Examples of Joining Member 20) In the first to third embodiments, examples have been described in which the coaxial connector 10 and the attachment object 30 are joined by soldering. However, they may be joined by other methods, such as by using a conductive adhesive.

[0049] (Application Example of Joining Member 20) In the first to third embodiments, an example has been described in which the joining member 20 is melted by applying heat in a reflow furnace. However, the joining member 20 may be melted by other methods. For example, a conceivable embodiment is one in which heat is applied to the coaxial connector 10 by applying a soldering iron to the housing 11, thereby melting the joining member 20 filled in the first recess 11a2.

[0050] (Application Example 1 of Mounting Object 30) In the first to third embodiments, an example has been described in which the mounting object 30 is a flexible substrate. However, the mounting object 30 may be a non-flexible substrate made of epoxy resin or the like, or may be a member other than a substrate.

[0051] (Application Example 1 of Mounting Object 30) In the first to third embodiments, the contact 16 is connected to the signal line 31. However, the contact 16 may be connected to a power supply line.

[0052] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are intended to be included within the scope and spirit of the invention, as well as within the scope of the invention described in the claims and their equivalents.

[0053] According to this specification, the following coaxial connectors are provided: (Aspect 1) Aspect 1 includes a core wire and a housing that holds the core wire and to which an attachment object is attached, wherein an area of ​​the housing that faces the attachment object and an area that holds the core wire are located on different planes.

[0054] According to the above-described aspect, the area of ​​the housing facing the object to be attached and the area holding the core wire are located on different planes, so that the coaxial connector can be placed in various positions on the object to be attached, thereby reducing installation constraints.

[0055] (Aspect 2) In aspect 2, the area of ​​the housing facing the attachment object extends in a direction inclined with respect to the extending direction of the core wire held in the housing.

[0056] According to the above-described embodiment, adverse electrical effects such as transmission line reflections are less likely to occur compared to when the optical fiber extends in the vertical direction.

[0057] (Aspect 3) In aspect 3, the area of ​​the housing facing the attachment object has an attachment surface that joins with the attachment object.

[0058] According to the above-mentioned embodiment, the joining area is larger and stronger than in the case of joining at lines or points. Therefore, even if an external force is applied, the joining area is less likely to come off. Compared to the case where a protruding area such as a fastening screw socket is provided around the periphery of the case, the case can be made smaller.

[0059] (Aspect 4) In aspect 4, the housing has a first recess that is recessed deeper than the mounting surface in an area facing the mounting object, and the first recess is filled with a joining material used to join the mounting object and the mounting surface.

[0060] According to the above-described aspect, by providing the first recess, the coaxial connector can be made lighter than a configuration in which the first recess is not provided, and the first recess can also be used as a storage location for the joining member.

[0061] (Aspect 5) In aspect 5, the housing has a passage that connects the outside with the first recess.

[0062] According to the above-described aspect, the first recess can be utilized as a discharge path from the area between the first recess and the attachment object.

[0063] (Aspect 6) In aspect 6, a contact extends from the core wire, and a first notch is formed on the mounting surface and the side surface of the housing at a position where the contact can be seen.

[0064] According to the above-described aspect, the first notch can form an electrical isolation space between the housing and the contacts. When attaching the coaxial connector to an object, the first notch can be used to easily align the contacts visible from the outside with the signal lines.

[0065] (Aspect 7) In aspect 7, a groove region is formed between the first recess and the first cutout in the mounting surface.

[0066] According to the above-described aspect, the groove region restricts the flow of the joining material, making it difficult for the joining material to spread beyond the groove region. This makes it difficult for the joining material to enter the region enclosed by the groove region on the mounting surface, and prevents mismatching of the characteristic impedance caused by changes in the gap between the region where the ground pattern is located and the core wire.

[0067] (Aspect 8) In aspect 8, a second notch is formed on the opposite side of the housing from the mounting surface.

[0068] According to the above-described aspect, even in an inclined area, the coaxial connector and the attachment object can be easily temporarily fastened together by clamping with a clip or the like.

[0069] (Aspect 9) Aspect 9 includes a contact extending from the core wire, and the contact is electrically connected to the attachment object in a deflected state.

[0070] According to the above-described embodiment, electrical connection can be achieved by the reaction force of the deflection, without using any joining such as soldering.

[0071] (Aspect 10) In aspect 10, the attachment object is a flexible substrate, and the coaxial connector is an SMP connector or an SMPM connector.

[0072] According to the above-mentioned aspect, it is easy to attach a small coaxial connector to a substrate. Electrical connection between the contacts and the signal lines of the substrate can be made without using hand soldering or other joining methods. This allows the signal lines to be made thinner, preventing degradation of electrical characteristics.

[0073] REFERENCE SIGNS LIST 10 Coaxial connector 11 Housing 11a1 Mounting surface (lower surface) 11a2 First recess 11a3 Passage 11a4 First notch 11a5 Groove area 11b2 Second notch 15 Core wire 16 Contact 17 Insulating portion 20 Joint member 30 Mounting object (flexible substrate) 31 Signal line

Claims

1. A coaxial connector comprising: a core wire; and a housing for holding the core wire and for attaching an object to be attached, wherein an area of ​​the housing facing the object to be attached and an area of ​​the housing for holding the core wire are located on different planes.

2. A coaxial connector as described in claim 1, wherein the area of ​​said housing facing the object to which said connector is attached extends in a direction inclined with respect to the extension direction of said core wire held in said housing.

3. A coaxial connector as described in claim 1 or 2, wherein the area of ​​said housing facing said object to be attached has a mounting surface that joins with said object to be attached.

4. A coaxial connector as described in claim 3, wherein the area of ​​the housing facing the object to be attached has a first recess that is recessed deeper than the mounting surface, and the first recess is filled with a joining material used to join the object to be attached and the mounting surface.

5. The coaxial connector according to claim 4, wherein said housing has a passage that connects the outside with said first recess.

6. A coaxial connector as claimed in claim 3, further comprising a contact extending from said core wire, and a first notch is formed in said mounting surface and a side surface of said housing at a position where said contact can be seen.

7. The coaxial connector according to claim 6, wherein a groove region is formed between said first recess and said first notch in said mounting surface.

8. The coaxial connector according to claim 3, wherein a second notch is formed on the side of the housing opposite the mounting surface.

9. A coaxial connector as claimed in claim 1 or 2, further comprising a contact extending from said core wire, said contact being electrically connected to said attachment object in a deflected state.

10. The coaxial connector according to claim 9, wherein the attachment object is a flexible substrate, and the coaxial connector is an SMP connector or an SMPM connector.

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