JP5544757B2 - Coaxial electrical connector - Google Patents

Description

  The present invention relates to a coaxial electrical connector having a central conductor and an outer conductor arranged substantially concentrically.

  In general, a coaxial electrical connector for electrically connecting various signal transmission media such as a coaxial cable is widely used in various electrical devices. For example, the coaxial electrical connector described in Patent Document 1 below relates to a coaxial receptacle connector mounted on a printed wiring board, and has a plate shape as shown in FIGS. A center conductor 2 and an outer conductor 3 are fixed substantially concentrically to an insulating housing (dielectric material) 1 formed as described above. The center conductor 2 and the outer conductor 3 have connection support portions 2a and 3a embedded in the inside of the insulating housing 1, and the surface of the insulating housing 1 is continuous with the connection support portions 2a and 3a. It has fitting contact portions 2b and 3b protruding from. And the coaxial plug connector which is the other party connector which abbreviate | omitted illustration is fitted or extracted with respect to those fitting contact parts 2b and 3b from the upper side.

  In recent years, as with other electronic components, such coaxial electrical connectors have been rapidly reduced in size and height in response to a request for reduction in thickness, thickness, and size. In particular, in reducing the size and height of the coaxial electrical connector, it is important to reduce the diameter of the outer conductor 3 having a large outer diameter. The outer diameter of the outer conductor 3 is determined by the coaxial electrical connector. Is determined based on the outer diameter of the center conductor 2 from the relationship with the characteristic impedance and the like. Therefore, in order to reduce the size of the coaxial electrical connector, first, it is necessary to reduce the outer diameter of the center conductor 2.

JP 2004-221055 A

  However, the center conductor 2 of the coaxial electrical connector is usually formed by pressing a thin metal plate, and the fitting contact portion 2b described above is formed by deep drawing as shown in FIG. It is formed in a hollow shape. In other words, the conventional center conductor 2 formed by deep drawing has a limit in reducing the outer diameter as much as the hollow portion is manufactured, and correspondingly, the outer diameter of the outer conductor 3, that is, coaxial At present, the outer diameter of the entire electrical connector is inevitably increased.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a coaxial electrical connector having a simple configuration and capable of reducing the size of the coaxial electrical connector.

In order to achieve the above object, the present invention has a center conductor and an outer conductor fixed to an insulating housing so as to be substantially concentric, and the center conductor and the outer conductor are formed by insert molding using a mold. A coaxial electrical connector comprising: a connection support portion embedded in an insulating housing; and a fitting contact portion arranged so as to protrude from the surface of the insulation housing continuously from the connection support portion. A flange portion having a larger diameter than that of the fitting contact portion is integrally provided at a base portion where the fitting contact portion of the conductor protrudes from the surface of the insulating housing, and the flange portion is integrally formed. The entire center conductor has a solid shape, and the flange portion of the center conductor has an exposed surface that forms substantially the same surface as the surface of the insulating housing. Sites other than the exposed surface of the parts, and at sites which lead to the connecting support part from the flange portion, which has been insert molded so as to bury the inside of the insulating housing with the mold, the gold In insert molding using a mold, a configuration is employed in which the abutting surface of the mold is brought into close contact with the exposed surface of the flange portion .

  According to the present invention having such a configuration, a solid central conductor is formed by, for example, driving a solid rod-shaped material, and a hollow portion is formed as in the conventional case. Since it is not necessary, the diameter of the central conductor can be greatly reduced. As the diameter of the center conductor is reduced, the overall size of the outer conductor and the coaxial electrical connector can be reduced.

  Moreover, since the metal material which has the possibility of regulation, such as brass required by the conventional deep drawing process, becomes unnecessary, it is preferable also from the viewpoint of environmental protection. Furthermore, as described above, the diameter of the central conductor is reduced, so that the manufacturing costs of the press and plating corresponding to the reduced diameter can be reduced.

  According to the present invention having such a configuration, when insert molding is performed using the center conductor in the insulating housing, the exposed surface of the flange provided on the center conductor is in close contact with the abutting surface of the mold. The flow of the resin material for insert molding is prevented by the contact contact surface between the exposed surface of the flange portion and the contact surface of the mold in the center conductor. As a result, the occurrence of resin burrs or the like is suppressed at the fitting contact portion where electrical contact is more important at the downstream side of the flow of the resin material for insert molding than the close contact surface.

  Further, when the connection support portion of the central conductor is soldered to the printed wiring board, the flux and the solder material tend to flow up and flow through the connection support portion, but the path through which the flux and the solder material flows Is increased by the amount of the surface of the flange described above, and the flow of flux and solder material is suppressed in the flange, and so-called soldering is prevented well.

  Further, the flange portion partially embedded in the insulating housing has a predetermined fixing force with respect to the insulating housing, and the center conductor as a whole is strongly fixed to the insulating housing. Therefore, for example, when the mating connector is removed from the fitted state, the possibility that the center conductor is peeled off from the insulating housing is reduced.

  In the present invention, the fitting contact portion of the center conductor can be formed in a substantially cylindrical shape by driving.

  According to the present invention having such a configuration, the fitting contact portion of the center conductor is easily and highly accurately formed by driving.

  Further, it is desirable that a chamfered portion for solder connection is formed on the front end surface of the connection support portion in the present invention.

  According to the present invention having such a configuration, the solder material is sufficiently secured in the chamfered portion of the connection support portion, and the connection support portion is in a good connection state with respect to the printed wiring board.

  Further, the fitting contact portion of the outer conductor in the present invention is formed from a hollow cylindrical body surrounding the fitting contact portion of the central conductor, and the hollow cylindrical body is arranged in the circumferential direction in the hollow cylindrical body. A discontinuous cutting gap is provided.

  According to the present invention having such a configuration, when the mating connector is fitted or removed, the outer conductor is elastically displaced by the amount of the cutting gap, and due to the elastic displacement of the outer conductor, The fitting or removal is performed smoothly.

  As described above, the coaxial electrical connector according to the present invention is configured so that the fitting contact portion of the center conductor fixed to the insulating housing so as to be substantially concentric has the fitting contact at the root portion protruding from the surface of the insulating housing. A flange that has a larger diameter than that of the center part is integrally provided, and the entire center conductor including the flange is formed so as to form a solid shape, enabling the diameter of the center conductor to be reduced. As a result, the overall size of the outer conductor and the coaxial electrical connector is reduced, the manufacturing cost of the press and plating is reduced, and the environmental protection is preferred. Therefore, the reliability of the coaxial electrical connector can be greatly improved at low cost.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective view illustrating a structure of a receptacle connector according to an embodiment of a coaxial electrical connector of the present invention. It is longitudinal cross-sectional explanatory drawing along the II-II line | wire in FIG. FIG. 3 is an explanatory perspective view of an external application showing a configuration of a central conductor used in the receptacle connector according to the present invention shown in FIGS. 1 and 2. It is longitudinal cross-sectional explanatory drawing along the IV-IV line in FIG. FIG. 5 is a longitudinal sectional explanatory view showing a schematic structure of an insert molding die used for molding the receptacle connector according to the present invention shown in FIGS. 1 to 4. It is an external appearance perspective explanatory view showing the structure of the receptacle connector concerning an example of the conventional coaxial electric connector. It is longitudinal cross-sectional explanatory drawing along the VII-VII line in FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  First, the coaxial electrical connector according to the embodiment shown in FIGS. 1 to 3 includes a vertical fitting type receptacle connector 10 mounted on a printed wiring board P, and the receptacle connector 10 is not shown. The plug connector as the mating connector is fitted or removed from the upper side. Hereinafter, a fitting direction in which the plug connector is inserted into the receptacle connector 10 is a downward direction, and an extraction direction opposite to the fitting direction is an upward direction.

  A receptacle connector 10 constituting one of such coaxial electric connector fittings includes an insulating housing (dielectric material) 11 made of an insulating plate-like member having a substantially rectangular planar shape, and is substantially concentric with the insulating housing 11. The center conductor 12 and the outer conductor 13 are fixed by insert molding so as to form a shape. The center conductor 12 and the outer conductor 13 include connection support portions 12a and 13a embedded in the insulating housing 11, and fitting contact portions 12b provided continuously from the connection support portions 12a and 13a. 13b.

  Of the members constituting the center conductor 12 and the outer conductor 13, the connection support portions 12 a and 13 a are formed so as to have a thick plate shape extending substantially horizontally inside the insulating housing 11 described above. . The connection support portions 12 a and 13 a are formed so as to extend along the lower surface of the insulating housing 11, and the lower surfaces of the connection support portions 12 a and 13 a are substantially flush with the lower surface of the insulating housing 11. It is arranged to be exposed to the lower side. And the lower surface side exposed surface of the connection support parts 12a and 13a is made into the arrangement | positioning relationship which contacts on the surface of the printed wiring board P mentioned above.

  Further, the distal end portions of these connection support portions 12a and 13a are formed so as to protrude outward from the side wall surface (standing wall surface) of the insulating housing 11, and the distal end surfaces of the outer side protruding portions are formed. , And soldered to the conductive path on the printed wiring board P. On the solder connection portions of these connection support portions 12a and 13a, that is, on the front end surfaces of the outward protruding portions, chamfered portions 12a1 and 13a1 for solder connection form inclined surfaces facing the surface of the printed wiring board P. The connection support portions 12a and 13a are secured to the printed wiring board P by sufficiently securing the solder material at the chamfered portions 12a1 and 13a1 of the connection support portions 12a and 13a. It is comprised so that it may be in a favorable connection state.

  Furthermore, as described above, the connection support portions 12a, 13a extending substantially horizontally are connected to the fitting contact portions 12b, 13b, and are formed so as to be bent upward at a substantially right angle. The fitting contact portions 12b and 13b continuing from the connection support portions 12a and 13a are formed to protrude vertically upward from the upper surface of the insulating housing 11. For each of the fitting contact portion 12b of the center conductor 12 and the fitting contact portion 13b of the outer conductor 13, corresponding portions of the plug connector as the mating connector are fitted or removed as described above. It has become so.

  At this time, the fitting contact portion 12b of the center conductor 12 described above is formed of a pin-shaped member having a substantially circular horizontal cross section. A flange portion 12c having a larger diameter than that of the fitting contact portion 12b is integrally provided at a base portion where the fitting contact portion 12b protrudes from the upper surface of the insulating housing 11. The flange portion 12 c has a thin plate shape that is substantially rectangular in plan and has an upper exposed surface 12 c 1 that forms substantially the same surface as the upper surface of the insulating housing 11. In addition, insert molding is performed so that the lower portion other than the upper exposed surface 12 c 1 is embedded in the insulating housing 11.

  As described above, the center conductor 12 has a structure that integrally includes the flange portion 12c together with the fitting contact portion 12b and the connection support portion 12a described above, but the entire center conductor 12 including them has a solid shape. Are integrally formed. In forming the solid central conductor 12, for example, a driving process for the whole including the fitting contact part 12b is adopted, and the driving process is performed on the original material, so that the fitting contact part is formed as described above. 12b is formed in a substantially cylindrical shape, and the flange portion 12c is formed in a thin plate shape projecting outward from the root portion of the fitting contact portion 12b, and the connection support portion 12a is formed , And is formed so as to have a thick plate shape that extends from the fitting contact portion 12b at a substantially right angle.

  On the other hand, the fitting contact portion 13b provided on the outer conductor 13 is formed of a hollow cylindrical body surrounding the fitting contact portion 12b of the center conductor 12 described above from the outer side. In the hollow cylindrical body constituting the fitting contact portion 13b of the outer conductor 13, a cutting gap portion 13b2 that makes the hollow cylindrical body discontinuous in the circumferential direction extends in the axial direction. The fitting contact portion 13b is elastically displaceable in the circumferential direction by the gap of the cutting gap portion 13b2.

  In addition, the connection support portion 13a continuously extending from the lower end portion of the fitting contact portion 13b in the outer conductor 13 extends substantially horizontally after being bent at a substantially right angle while being embedded in the insulating housing 11. It is formed from a plate-like member. The connection support portion 13a provided on the outer conductor 13 extends in three directions except for the connection support portion 12a on the side of the center conductor 12 described above. It is arrange | positioned so that the lower surface of this may be formed in the substantially same surface and exposed below. And the exposed surface of the lower surface side is made into the arrangement | positioning relationship which contacts on the surface of the said printed wiring board P, and is for the solder connection provided in the front end surface of the outward side protrusion part of the said connection support part 13a. The chamfered portion 13a1 is soldered to the conductive path on the printed wiring board P as described above.

  In the present embodiment having such a configuration, a solid center conductor 12 is formed by, for example, driving a solid rod-shaped material, and a hollow portion is formed as in the prior art. Therefore, the diameter of the central conductor 12 can be greatly reduced. As the diameter of the center conductor 12 is reduced, the overall size of the outer conductor 13 and the coaxial electrical connector 10 can be reduced.

  Moreover, since the metal material which has the possibility of regulation, such as brass required by the conventional deep drawing process, becomes unnecessary, it is preferable also from the viewpoint of environmental protection. Furthermore, as described above, the diameter of the central conductor 12 is reduced, so that the manufacturing costs of the press and plating corresponding to the reduced diameter can be reduced.

  Furthermore, according to the above-described embodiment, when insert molding is performed using the center conductor 12 in the insulating housing 11, as shown in FIG. 5 in particular, above the flange 12c provided in the center conductor 12. Since the abutting surface A1 of the upper mold A is in close contact with the exposed surface 12c1, the upper exposed surface 12c1 of the flange 12c and the abutting surface A1 of the upper mold A in the center conductor 12 thereof. Therefore, the flow of the resin material for insert molding is prevented at the close contact portion. As a result, as described above, the occurrence of resin burrs or the like on the fitting contact portion 12b, which is downstream of the flow of the resin material for insert molding from the portion where the flow of the resin material is blocked and electrical contact is important, is generated. It is suppressed.

  In addition, when the connection support portion 12a of the central conductor 12 is soldered to the printed wiring board P, the flux or solder material tends to flow up and flow through the connection support portion 12a. The length of the passage through which the fluid flows is increased by the amount of the surface of the flange portion 12c described above, and the flow of flux and solder material is suppressed in the flange portion 12c, and so-called soldering is well prevented.

  Further, since the flange portion 12c partially embedded in the insulating housing 11 has a predetermined fixing force with respect to the insulating housing 11, the entire central conductor 12 is firmly fixed to the insulating housing 11. For example, when the mating connector is removed, the possibility that the center conductor is peeled off from the insulating housing 11 is reduced.

  Furthermore, since the fitting contact portion 12b of the center conductor 12 according to the present embodiment is formed to have a substantially cylindrical shape by driving, the fitting contact portion 12b of the center conductor 12 is easy and highly accurate. Formed.

  In addition, since a chamfered portion 12a1 for solder connection is formed on the distal end surface of the connection support portion 12a according to the present embodiment, a solder material is sufficiently secured in the chamfered portion 12a1 of the connection support portion 12a. Thus, the connection support portion 12a is in a good connection state with the printed wiring board P.

  Furthermore, in the present embodiment, the hollow cylindrical body constituting the fitting contact portion 13b of the outer conductor 13 is provided with a cutting gap portion 13b2 that makes the hollow cylindrical body discontinuous in the circumferential direction. Therefore, when the plug connector as the mating connector is fitted or removed, the outer conductor 13 is elastically displaced by the amount corresponding to the cutting gap portion 13b2, so that the mating connector can be smoothly fitted or removed. Is called.

  Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

  For example, in the above-described embodiment, the present invention is applied to the receptacle connector, but the present invention can be similarly applied to other types of coaxial connectors such as a plug connector. In addition, the above-described embodiment is an embodiment in which the present embodiment is applied to a vertical fitting type coaxial electric connector. However, the embodiment is similarly applied to a horizontal fitting type coaxial electric connector.

  Furthermore, the present invention can be similarly applied to a coaxial electrical connector to which a flexible wiring board or the like is coupled, a board-to-board coaxial connector for connecting printed boards to each other, and the like.

  As described above, the present embodiment can be widely applied to a wide variety of coaxial electrical connectors used in various electrical devices.

10 Receptacle connector (coaxial electrical connector)
11 Insulating housing (dielectric)
12 central conductor 12a connection support portion 12a1 solder connection chamfer 12b fitting contact portion 12c flange 12c1 upper exposed surface 13 outer conductor 13a connection support portion 13a1 solder connection chamfer 13b fitting contact portion 13b2 cutting gap portion P Printed wiring board

Claims (4)

A connection support in which a central conductor and an outer conductor are fixed to the insulating housing so as to be substantially concentric, and the central conductor and the outer conductor are embedded in the insulating housing by insert molding using a mold. A coaxial electrical connector comprising a portion and a fitting contact portion arranged so as to protrude from the surface of the insulating housing continuously from the connection support portion,
At the root portion where the fitting contact portion of the central conductor protrudes from the surface of the insulating housing, a flange portion having a larger diameter than the fitting contact portion is integrally provided,
The entirety of the central conductor integrally having the flange portion is formed so as to form a solid state,
The flange portion of the center conductor has an exposed surface that forms substantially the same surface as the surface of the insulating housing,
The part other than the exposed surface in the collar part and the part connected to the connection support part from the collar part are insert-molded so as to be embedded in the insulating housing using the mold ,
In insert molding using the mold, the coaxial electrical connector is brought into contact with the exposed surface of the flange so that the abutting surface of the mold is in close contact .   The coaxial electrical connector according to claim 1, wherein the fitting contact portion of the center conductor is formed into a substantially cylindrical shape by a driving process.   The coaxial electrical connector according to claim 1, wherein a chamfered portion for solder connection is formed on a distal end surface of the connection support portion. The fitting contact portion of the outer conductor is formed from a hollow cylindrical body surrounding the fitting contact portion of the center conductor,
The coaxial electrical connector according to claim 1, wherein the hollow cylindrical body is provided with a cutting gap portion that makes the hollow cylindrical body discontinuous in the circumferential direction.

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