JP5867872B2 - Coaxial connector for board - Google Patents

Description

  The present invention relates to a coaxial connector for substrates which is a mating connector connected to a coaxial cable connector. In particular, the present invention relates to an insulator constituting a coaxial connector for substrates.

  In recent years, electronic devices such as mobile phones, notebook personal computers (PCs), and tablet PCs have been actively developed. In general, these electronic devices are manufactured to be small enough to be carried and carried and are convenient for users. Improvements are being made.

  As described above, as electronic devices become smaller in size, it is necessary to collect a large number of components in the electronic device, and various components incorporated in the electronic device must be made smaller and smaller. A coaxial cable is often used to connect high-frequency circuit components used in cellular phones, notebook PCs, tablet PCs, and the like that have become commonly used for communication in recent years. There is also a demand for miniaturization of the coaxial cable connector. In particular, there is a strong demand for a reduction in height to reduce the height of the coaxial cable connector. For example, the height of the connector at the time of cable connection is required to be about 1 mm or less. However, considering the processing accuracy, strength, product standards, etc. of the parts, it is difficult to simply reduce the size of the connector and the cable, so it is necessary to reduce the height by devising the structure in the connector.

  As a small coaxial cable connector whose coaxial cable has a diameter of about several millimeters, for example, there is a technique disclosed in Japanese Patent Application Laid-Open No. 2004-311452 (Patent Document 1). An L-shaped coaxial plug (coaxial cable connector) described in Patent Document 1 includes a terminal to which a central conductor of a coaxial cable is connected, an insulator that supports the terminal so as to surround the terminal, and an outer conductor that houses the insulator. A mating connector (coaxial connector for board) that fits into an L-shaped coaxial plug, a terminal (center terminal), an insulator that supports the terminal so as to surround the terminal, and an external conductor that houses the insulator With. The L-type coaxial plug is electrically connected to the mating connector by fitting the terminal and the outer conductor to the terminal and the outer conductor of the mating connector.

  The space inside the cylindrical side wall of the outer conductor of the mating connector (substrate coaxial connector) is filled with an insulator. Thus, by filling many insulators inside the cylindrical side wall of the mating connector, the coupling strength can be increased and the coupling of the respective components can be maintained.

Japanese Patent Laid-Open No. 2004-311452

  As the coaxial cable connector and the coaxial connector for board (also called “mating connector”) are reduced in size and height, the mating connector connected to the coaxial cable connector needs to be reduced in size and height. There is. However, in the mating connector described in Patent Document 1, when the height of the terminal is lowered, the contact area is reduced and the contact reliability is lowered. Further, when the amount of the insulator is reduced, there arises a problem that sufficient bonding strength between the respective parts cannot be maintained.

  Accordingly, an object of the present invention is a coaxial connector for a board that is electrically connected to a coaxial cable connector, the central terminal, an external conductor having the central terminal inside, and the central terminal and the external conductor separated from each other. A board coaxial connector having a structure capable of lowering the fitting height is provided. Further, the present invention provides a coaxial connector for a substrate having a structure that can sufficiently maintain the coupling between components even if the number of insulators inside the outer conductor is reduced.

In one embodiment of the board coaxial connector connected to the coaxial cable connector according to the present invention, the board coaxial connector is:
A center terminal, an outer conductor that houses the center terminal, and an insulator that holds the outer conductor and the center terminal apart from each other.
The center terminal has a contact portion that contacts the coaxial cable connector, a disc portion that extends in a radial direction from a base portion of the contact portion, and a connection portion that is provided at a free end of the disc portion,
The outer conductor has a cylindrical portion for fitting with the coaxial cable connector, and an extending portion extending perpendicularly to the fitting direction from the lower edge of the cylindrical portion,
The cylindrical portion has an engaging portion that engages an outer conductor of the coaxial cable connector on an outer wall, and the insulator inside the cylindrical portion is connected to the coaxial connector for the board of the coaxial cable connector. A flat portion capable of restricting excessive entry, and an exposed portion that exposes a partial upper surface of the disk portion around the base portion of the contact portion;
The back surface of the central conductor and the back surface of the extended portion of the external conductor are exposed as the back surface of the coaxial connector for board.

  The upper surface of the flat portion is at a position higher than the upper surface of the extension portion, and the upper surface of the extension portion is a partial upper surface of the disk portion around the base portion of the contact portion exposed from the exposed portion. It is characterized by being in a higher position.

  As a preferred embodiment of the coaxial connector for a substrate according to the present invention, a convex protrusion is provided at the boundary between the exposed portion and the flat portion.

  As a preferred embodiment of the coaxial connector for a board according to the present invention, the extension portion includes a mounting portion extending perpendicularly to the fitting direction from a lower edge of the cylindrical portion, and an end of the mounting portion. It is characterized by comprising a low-profile mounting part that is lower than the mounting part that extends from the edge, and an insulator that covers at least the upper surface of the low-profile mounting part.

  As a preferred embodiment of the coaxial connector for substrates according to the present invention, a height dimension of the low-profile mounting part whose upper surface is covered with the insulator is not more than a height dimension of the mounting part.

In another embodiment of the coaxial connector for board connected to the coaxial cable connector according to the present invention, the coaxial connector for board includes a center terminal, an outer conductor for accommodating the center terminal therein, and the outer conductor. And an insulator for holding the center terminal apart from each other,
The center terminal has a contact portion that contacts the coaxial cable connector, and a connection portion that connects to the substrate,
The outer conductor has a cylindrical portion for fitting with the coaxial cable connector, and a planar mounting portion for mounting on a substrate,
The mounting portion extends from the lower edge of the cylindrical portion perpendicular to the fitting direction,
The mounting portion has a gap at least at one place, and the connection portion of the center terminal can be extended in a direction perpendicular to the fitting direction in the gap,
The mounting portion extends a low-profile mounting portion that is lower than the mounting portion from an edge of the mounting portion,
The insulator is formed so as to fill the gap in the cylindrical portion, cover the connection portion, and cover the low-profile mounting portion.

  As a preferred embodiment of the coaxial connector for substrates according to the present invention, a height dimension of the low-profile mounting part whose upper surface is covered with the insulator is not more than a height dimension of the mounting part.

  As a preferred embodiment of the coaxial connector for a substrate according to the present invention, the low-profile mounting portion extends from both ends of the mounting portion on the gap side.

  As a preferred embodiment of the coaxial connector for a substrate according to the present invention, the mounting portion extends in the opposite direction from the lower edge of the cylindrical portion with the gap therebetween.

As a preferred embodiment of the coaxial connector for a substrate according to the present invention, the width direction of the mounting portion is a direction connecting one side of the gap to the other,
The distance from one end to the other end of the mounting portion in the width direction is equal to the diameter of the lower outer edge of the cylindrical portion.

  A coaxial connector for a board comprising a center terminal, an outer conductor having the center terminal on the inside, and an insulator for holding the center terminal and the outer conductor apart from each other. By forming a flat portion that can restrict excessive entry of the connector into the coaxial connector for a board, and an exposed portion that is dug down from the flat portion and exposes the periphery of the contact portion and the upper edge of the root portion. When connecting the coaxial cable connector, the contact portion on the coaxial cable connector side can be inserted into the exposed portion around the contact portion on the coaxial connector side for the board while appropriately preventing excessive entry by the plane portion. Thereby, the height at the time of connection of a coaxial cable connector and a coaxial connector for substrates can be made lower than the conventional one.

  Thus, the board coaxial connector having the above-described effects can be provided by the accommodation space formed by the exposed portion and the flat portion formed inside the cylindrical portion of the outer conductor.

  In addition, on the straight line passing through the center of the cylindrical portion of the outer conductor, a gap is provided at two locations on the lower edge of the cylindrical portion, and the gap extends from the lower edge of the cylindrical portion in the opposite direction. Insulators are integrated so as to cover the upper surface of the low-profile mounting part by filling the gap at the lower edge of the cylindrical part with low-profile mounting parts at both ends of each mounting part. By molding, it is locked so that the insulator is sandwiched between the lower edge of the cylindrical part and the upper surface of the low-profile mounting part, and it is possible to strongly maintain the coupling between the outer conductor and the insulator, The center terminal is integrally formed with the insulator, and the bond between the center terminal and the insulator can be maintained strongly. That is, even if the number of insulators inside the outer conductor is reduced, the coupling between the components can be sufficiently maintained.

  A coaxial connector for a board that has the above-mentioned effects with a structure in which an insulator is sandwiched between the lower edge of the cylindrical portion of the outer conductor and the upper surface of the low-profile mounting portion that extends from the mounting portion of the outer conductor. Can be provided.

It is a figure which shows the state before the assembly of a coaxial cable connector. It is a figure which shows the coaxial cable connector of the state which fitted the insulator to the external conductor. It is a figure which shows the coaxial cable connector of the state which closed and fixed the outer cover part of the outer conductor, and the inner cover part of the insulator completely. It is sectional drawing of the coaxial cable connector shown in FIG. It is a figure which shows the contact part of the terminal exposed from the insulator. It is a figure which shows the state before forming an insulator in the coaxial connector for boards, and the state after forming an insulator.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that components having the same function are denoted by the same reference symbols throughout the drawings for describing the embodiment, and the repetitive description thereof will be omitted.

  FIG. 1 is a diagram showing each member in a state before assembly of a coaxial cable connector according to an embodiment of the present invention. In the coaxial cable connector according to the present embodiment, the extending direction of the coaxial cable and the fitting direction (inserting direction) of the board coaxial connector are substantially perpendicular to each other. Here, in order to simplify the description, in the fitting direction, the fitting side of the coaxial cable connector and the coaxial connector for a board is the lower side (lower side, lower side), and the opposite side is the upper side (upper side, upper side). To do. This coaxial cable connector (also referred to as an L-type coaxial cable connector) includes an outer conductor 100 that is electrically connected to a shielded wire of a coaxial cable (see FIGS. 3 and 4), and an insulator 200 that is accommodated in the outer conductor 100. The terminal 300 is integrally formed and embedded in the insulator 200 and is electrically connected to the central conductor of the coaxial cable.

  The outer conductor 100 is made by punching a metal plate made of a conductive material such as phosphor bronze and bending it. As shown in FIG. 1, the opening portion of the outer conductor 100 for fitting with the coaxial connector for a board is rounded so as to be substantially cylindrical, and a cylindrical portion 102 having a gap 104 at one place in the circumferential direction. , Two supporting arm portions 106 parallel to the fitting direction (vertical direction) with the coaxial connector for a board extending from the positions on both sides of the gap 104, and the gap 104 in the diametrically opposite side, The outer lid portion 108 is provided upright from the upper end of the cylindrical portion 102.

  The cylindrical portion 102 is a portion that accommodates the fitting portion 202 of the insulator 200 in a concentric position, and has a protruding seat portion 110 that receives the cylindrical portion 506 of the coaxial connector for substrate 500 on the inner surface by embossing or the like. Grooves 112 and 113 for fixing the insulator 200 when the insulator 200 is fitted into the outer conductor 100 are formed at the upper edge of the cylindrical portion 102 and the upper portion of the support arm portion 106. . Further, a groove 114 for fixing the insulator 200 is also formed below the support arm 106. In the embodiment shown in FIG. 1, the groove 113 is formed on the coaxial cable side (that is, rearward) with respect to the groove 114, and the groove 114 is formed near the base portion of the support arm 106. Further, a claw portion 115 is formed to be bent inward at a part of the upper edge of the cylindrical portion 102 and to be hooked and locked on the upper surface of the fitting portion 202 of the insulator 200. As described above, the grooves 112, 113, and 114 can function as a support portion for fixing and supporting the insulator 200 inside the outer conductor 100. In addition, a support part such as a groove part or a claw part can be formed on the support arm part.

  The outer lid portion 108 surrounds the constricted bent portion 116, a cylinder protective lid 118 that covers the cylindrical portion 102 when bent, a conductor protective lid 119 that covers the support arm portion 106, and the support arm portion 106 after bending. A fixing portion 120 for fixing the shielded cable, a shielded cable crimping portion 122 for encircling and electrically connecting the shielded wire of the coaxial cable, and an outer skin caulking portion 124 for caulkingly encircling the outer skin of the coaxial cable. The outer lid portion 108 is bent by a bent portion 116 that is a connection portion with the cylindrical portion 102 when connecting to the coaxial cable, and covers the coaxial cable.

  The cylinder protection cover 118 has side portions 126 that are bent downward at both ends when bent. Further, when the bent portion 116 is bent, a protruding portion 128 is formed on the inner surface by embossing or the like. When the outer cover 108 is closed, the protruding portion 128 hits the upper surface of the fitting portion 202 of the insulator 200, so that the fitting portion 202 can be firmly pushed into the cylindrical portion 102 and fixed. . The distance between the inner surfaces of the two side portions 126 is the same as or larger than the outer diameter of the cylindrical portion 102.

  The fixing part 120 of the conductor protective lid 119 has an extension part 130. After the bending part 116 is bent, the extension part 130 contacts the outer surface of the support arm part 106, and the extension part 130 is bent inward and supported. It is shaped so as to wrap around the arm portion 106.

  The shield wire caulking portion 122 has a side portion 132, and after the bent portion 116 is bent, the shield wire of the coaxial cable is caulked and electrically connected. In addition, since the projecting portion 134 is formed on the inner surface by embossing, the coaxial cable is difficult to be removed from the connector even if the coaxial cable is pulled in the extending direction after the caulking.

  The outer caulking portion 124 also has a side portion 136, and after the bent portion 116 is bent, the outer casing of the coaxial cable is caulked. In addition, since the protruding portion 138 is formed on the inner surface by embossing, the coaxial cable is made difficult to come out of the connector even if the coaxial cable is pulled in the extending direction after the caulking.

  The insulator 200 is made by molding an insulating material. As the insulating material, for example, a heat-resistant and flexible material such as a material in which liquid crystal polymer (LCP, liquid crystal polymer) resin is filled with a filler such as glass fiber, carbon fiber, or mica is used. The insulator 200 is roughly divided into a substantially cylindrical fitting portion 202 and a conductor support portion 204 extending from the fitting portion 202 in the extending direction of the coaxial cable radially outward. In order to simplify the description, on the straight line in the extending direction of the coaxial cable, the direction of the fitting portion 202 is the front (front end, front), and the direction of the conductor support portion 204 is the rear (rear end, rear). .

  The insulator 200 has an inner lid portion 206 that is located at a boundary portion between the fitting portion 202 and the conductor support portion 204 and extends upward. The inner lid portion 206 can be bent at the base portion and can be closed in the same direction as the outer lid portion 108. In one embodiment shown in FIG. 1, the inner surface (pressing surface) is formed in order to reduce the thickness of the base portion of the inner lid portion 206 so as to correspond to the curved surface portion 316 of the terminal 300 and to bend easily from the base portion. ) Has a slope. In addition, the slope which makes the thickness of the base part of the inner cover part 206 thin can also be provided in an outer surface.

  Further, the inner lid portion 206 only needs to be positioned closer to the conductor support portion 204 (that is, the rear side) than the central axis in the fitting direction of the fitting portion 202. In one embodiment shown in FIG. An intermediate lid portion 206 is provided on substantially the boundary between the conductor support portion 204 and the conductor support portion 204 (upper edge of the substantially cylindrical fitting portion 202).

  In a state where the inner lid portion 206 is opened, at least the connection portion 302 and the curved surface portion 316 of the terminal 300 are exposed. When the inner lid portion 206 is closed, the central conductor of the coaxial cable is sandwiched between the inner surface (pressing surface) of the inner lid portion 206 and the upper surface (connection surface) of the connection portion 302, so that the central conductor is connected to the connection portion 302. Although it is not necessary to solder, since the central conductor does not come out from between the inner lid part 206 and the connection part 302, the connection surface of the connection part 302 and / or the inner surface of the inner cover part 206 can be processed into irregularities. .

  A protrusion 208 that protrudes radially outward from the central axis of the fitting portion 202 is formed on the upper peripheral edge of the fitting portion 202 of the insulator 200. The protrusion 208 is provided at a position corresponding to the groove 112 of the outer conductor 100. Thereby, the protrusion 208 is held in the groove of the groove 112. In addition, projecting portions 209 projecting outward from upper side walls on both sides of the conductor support portion 204 are formed, and projecting portions 210 projecting outward from lower sidewalls on both sides of the conductor support portion 204 are formed. The protruding portions 209 and 210 formed on the side wall of the conductor support portion 204 are provided at positions corresponding to the grooves 113 and 114 of the external conductor 100 in order to sandwich the support arm portion 106 of the external conductor 100 from above and below. Further, the engaging portion 212 is formed by partially reducing the thickness of the fitting portion 202 in the fitting direction. The locking portion 212 is formed at a position corresponding to the position of the claw portion 115 formed by partially cutting the upper edge of the tubular portion 102 of the outer conductor 100 and bending the cut portion inward. For example, in the embodiment shown in FIG. 1, since the claw portion 115 is provided in the vicinity of the bent portion 116, the locking portion 212 is formed near the distal end side (the outer lid portion 108 side) of the fitting portion 202. . A locking portion 212 lower than the height of the fitting portion 202 is provided by processing the upper surface on the distal end side of the fitting portion 202 into a concave shape.

  Referring to FIG. 4 to be described later, the terminal 300 includes a connecting portion 302 at one end, a contact portion 304 at the other end, and a bridge portion 308 that connects the connecting portion 302 and the contact portion 304. Yes. The shape of the terminal 300 may be a horizontal U shape in which a connection portion 302 and a contact portion 304 are disposed below the bridge portion 308. The terminal 300 is integrally formed with the insulator 200, the connection portion 302 is opened upward, the contact portion 304 is opened downward, and the bridge portion 308 is sandwiched and held by the insulator 200 from above and below. . The upper edge of the contact portion 304 and the upper surface of the bridge portion 308 are each covered with the insulator 200, so that the insulation state with the outer lid portion 108 of the outer conductor 100 can be maintained.

  FIG. 2 is a view of the coaxial cable connector of one embodiment of the present invention after the insulator 200 is fitted into the outer conductor 100. The coaxial cable connector is assembled as follows. First, while the fitting portion 202 of the insulator 200 is accommodated in the cylindrical portion 102 of the outer conductor 100, the protrusions 208, 209, and 210 of the insulator 200 are inserted into the grooves 112, 113, and 114 of the outer conductor 100. By inserting (or fitting), the insulator 200 is accommodated in the outer conductor 100. Note that the terminal 300 is incorporated in the insulator 200 in advance by integral molding.

  Next, the central conductor of the coaxial cable is disposed at the connection portion 302 of the terminal 300. The coaxial cable is stripped by using a stripper or the like and is exposed in the order of the central conductor C1, the dielectric C2, the shield line C3, and the outer sheath C4 from the end of the coaxial cable (FIG. 3 or FIG. 3). 4). Thereafter, when the outer lid portion 108 is bent and the lid is closed, the inner surface (inner surface) of the conductor protective lid 119 contacts the top of the surface of the middle lid portion 206 extending upward from the insulator 200. The inner lid portion 206 receives a pressing force from the inner surface of the conductor protection lid 119 and is closed together with the outer lid portion 108. When the outer lid portion 108 is closed, the cylinder protective lid 118 can cover the fitting portion 202 of the insulator 200, and the conductor protective lid 119 can cover the conductor support portion 204 of the insulator 200.

  When the outer lid portion 108 (in particular, the cylinder protective lid 118) of the outer conductor 100 is tilted so as to cover the cylindrical portion 102 and the fitting portion 202 of the insulator 200 accommodated therein, the bent portion 116 is bent. Let me. At that time, a pressing force is applied to the outer surface of the middle lid portion 206 of the insulator 200 by the cylinder protective lid 118 of the outer conductor 100. The inner lid portion 206 receives the pressing force, and the inner surface (that is, the pressing surface) of the inner lid portion 206 and the upper surface of the connecting portion 302 of the terminal 300 (that is, the connection surface for connecting the central conductor C1). ) Between the central conductor C1 of the coaxial cable.

  After that, the fixing portion 120 surrounds the support arm portion 106 so that the outer lid portion 108 is not opened, and the extension portion 130 is formed so as to wrap around the support arm portion 106, and the position of the outer lid portion 108 is changed. Fix it. Furthermore, the shield wire C3 is caulked and surrounded by the shield wire crimping portion 122, and the electrical connection between the shield wire C3 and the external conductor 100 is ensured. Further, the outer skin C4 is caulked and surrounded by the outer skin caulking portion 124, and the coaxial cable is fixed so as not to be detached from the connector. The center conductor C1 is pinched and the shield line C3 and the outer skin C4 are deformed by being crimped. However, the dielectric C2 is not pinched and is not crimped so that the shape is greatly deformed. Even if the coaxial cable is fixed to the connector, it does not deform. Therefore, there is little change in electrical characteristics such as the impedance of the cable when the connector is connected.

  The external appearance of the coaxial cable connector assembled according to the above procedure is shown in FIG. The coaxial cable connector 400 is fitted into a board coaxial connector 500 installed on a board or the like. The board coaxial connector 500 includes a center terminal 502, an external conductor 504, and an insulator 508, and the external conductor 504 has a cylindrical portion 506.

  FIG. 4 is a cross-sectional view taken along the line AA and the line BB in FIG. FIG. 4A shows a state before the coaxial cable connector 400 is connected to the board coaxial connector 500. The center conductor C1 is clamped by the inner surface (pressing surface) of the inner lid portion 206 and the upper surface (connection surface) of the connection portion 302 of the terminal 300, and electrical connection between the terminal 300 and the center conductor C1 can be ensured. Since the connection surface processed into the irregularities of the connection part 302 is engaged with the center conductor C1, it is possible to prevent the center conductor C1 from being separated from or disconnected from the terminal 300. Therefore, it is not necessary to fix the center conductor C1 to the terminal by soldering.

  FIG. 4B shows a state in which the coaxial cable connector 400 is connected to the board coaxial connector 500. The contact portion 304 of the terminal 300 of the coaxial cable connector 400 is fitted to the center terminal 502 exposed from the center of the coaxial connector 500 for board, and the cylindrical portion 102 of the outer conductor 100 of the coaxial cable connector 400 is fitted to the coaxial connector 500 for board. The outer conductor 504 is fitted into the cylindrical portion 506 to ensure electrical connection.

  A concave engaging portion 507 provided on the outer periphery of the cylindrical portion 506 of the outer conductor 504 is fitted into the inner peripheral protrusion of the cylindrical portion 102 of the outer conductor 100 constituting the coaxial cable connector 400, and the coaxial cable connector 400 is used for a substrate. The coaxial connector 500 can be fitted. At that time, the fitting portion 202 of the insulator 200 and the contact portion 304 of the terminal 300 that constitute the coaxial cable connector 400 are accommodated inside the tubular portion 506. Thus, the inside of the cylindrical portion 506 can function as a space that can accommodate the fitting portion 202 of the insulator 200 and the contact portion 304 of the terminal 300.

  The board coaxial connector 500 includes a center terminal 502 having a contact portion 501 that is fitted and electrically connected to the contact portion 304 of the terminal 300 of the coaxial cable connector 400. Referring to FIG. 4 and FIG. 6 described later, the contact portion 501 of the center terminal 502 according to an embodiment of the present invention has a cylindrical shape extending in the fitting direction. Note that the shape of the contact portion 501 can be appropriately changed according to the shape of the contact portion 304 on the coaxial cable connector 400 side.

  Further, the center terminal 502 has a disk portion 503 that extends from the base portion of the contact portion 501 in a radial direction (horizontal direction) perpendicular to the fitting direction. A connection portion 514 for connecting to the substrate is provided at the free end of the disc portion 503. The peripheral edge of the disc portion 503 is held by an insulator 508.

  As apparent from FIG. 4 and FIG. 6 to be described later, the periphery of the cylindrical contact portion 501 of the coaxial connector for substrate 500 according to the present invention is not covered with the insulator 508 and almost from the side surface of the contact portion 501. An exposed portion 509 having a space with a constant interval is formed. The exposed portion 509 exposes at least a part of the upper surface of the disc portion 503 around the root portion of the contact portion 501. The inside of the cylindrical portion 506 is filled with an insulator 508, and the insulator 508 (inner insulator 517) on the inside forms a flat portion 518 and a convex portion 519 which is a convex protrusion. More specifically, a convex portion 519 that is the same as or lower than the height of the contact portion 501 is formed outside the exposed portion 509 around the contact portion 501, and further, a flat portion 518 is formed outside the convex portion 519. Is formed. Note that the shape, height, width, and the like of the exposed portion 509, the flat portion 518, and the convex portion 519 are appropriately determined according to the shape, height, width, and the like of the fitting portion 202 and the contact portion 304 that constitute the coaxial cable connector 400. Can be changed. For example, the height of the convex portion 519 may be the same as the height of the flat portion 518, and the convex portion 519 may not be provided.

  When the coaxial cable connector 400 is connected to the board coaxial connector 500, the space inside the cylindrical portion 506 accommodates the fitting portion 202 of the insulator 200 and the contact portion 304 of the terminal 300 constituting the coaxial cable connector 400. It is the accommodation space for doing. The contact portion 304 on the coaxial cable connector side can be sufficiently inserted into the exposed portion 509 in the space around the contact portion 501 on the board coaxial connector 500 side. The flat portion 518 is capable of contacting the top surface of the side wall 216 in the fitting portion 202 of the insulator 200 constituting the coaxial cable connector 400, so that the coaxial cable connector 400 is excessively advanced (that is, when connected) It is possible to function as a stopper that restricts the coaxial cable connector 400 from entering the coaxial connector 500 for board too much). That is, by providing the upper surface of the flat surface portion 518 at a position higher than the upper surface of the disk portion 503 around the root portion of the contact portion 501 that is partially exposed from the exposed portion 509, the flat surface portion 518 is connected when the connectors are connected. Accordingly, the contact portion 304 on the coaxial cable connector 400 side can be inserted into the exposed portion 509 around the contact portion 501 on the board coaxial connector 500 side while appropriately preventing excessive entry.

  Referring to FIGS. 4B and 6B, in the state in which the coaxial cable connector 400 is connected to the board coaxial connector 500, the relationship between the heights of the respective members is as follows. If the reference of the lowest position is the upper edge of the disc portion 503, the upper surface of the extending portion (outer insulator 520) of the insulator 200 is located at a position higher than the upper edge. The upper surface of the extended portion (mounting portion 510) of the external conductor 504 is at the same height as the upper surface of the outer insulator 520 or at a position higher than that. There is a plane portion 518 at a position higher than the upper surface of the mounting portion 510, and there is a convex portion 519 at a position higher than the plane portion 518. When the connector is connected, the surface of the flat region 214 of the fitting portion 202 is above the convex portion 519, and the upper end of the cylindrical portion 506 is at a position higher than the surface of the flat region 214.

  FIG. 5 is a diagram illustrating the contact portion 304 of the terminal 300 exposed from the insulator 200 according to an embodiment of the present invention. The terminal 300 is embedded in the insulator 200 by integral molding, and the contact portion 304 is formed in an exposed state as shown in FIG. A planar region 214 is formed of an insulating material so as to surround the contact portion 304, and a side wall 216 is formed of an insulating material so as to surround the planar region 214. The planar area 214 surrounds the periphery of the contact portion 304, so that the edge of the contact portion 304 opposite to the fitting side can be prevented from spreading, and the center terminal 502 of the board coaxial connector 500 is connected to the contact portion 304. When it is inserted into the center terminal 502, it is possible to ensure a narrow pressure sufficient to sandwich the center terminal 502.

  6 shows the appearance of the board coaxial connector 500, FIG. 6 (a) shows a state before an insulator is formed on the board coaxial connector 500, and FIG. 6 (b) shows the board coaxial connector 500. Shows the state after the insulator is formed. As shown in FIG. 6A, the board coaxial connector 500 includes a center terminal 502 and an external conductor 504. The outer conductor 504 is made by punching a metal plate made of a conductive material such as phosphor bronze and bending it. An opening portion of the outer conductor 504 is rounded so as to be substantially cylindrical to form a cylindrical portion 506, and the cylindrical portion 506 includes an inner periphery of the cylindrical portion 102 of the outer conductor 100 that constitutes the coaxial cable connector 400. A concave engaging portion 507 for engaging a convex protrusion provided on the base plate can be provided. The shape of the engaging portion 507 can be changed according to the shape of the inner periphery of the cylindrical portion 102 on the coaxial cable connector 400 side. The cylindrical portion 506 has a gap 516 formed by providing grooves at two locations on the lower edge of the cylinder on a straight line passing through the center of the cylinder.

  Used for mounting on the substrate from the lower edge of the cylindrical portion 506 perpendicular to the fitting direction of the cylindrical portion 506, with a gap 516 at the lower edge of the cylindrical portion 506. The mounting part 510 extends. The mounting portions 510 extend in opposite directions with the gap 516 interposed therebetween. The direction of the straight line passing through the center of the extended mounting portion 510 and the center of the cylindrical portion 506 is defined as the extending direction of the mounting portion 510. The direction perpendicular to the extending direction of the mounting portion 510 (the direction of a straight line passing through the center of the gap 516 and the center of the cylindrical portion 506) is defined as the width direction of the mounting portion 510. The range in which the mounting portion 510 extends can be a substantially square range surrounding the circumference of the tubular portion 506 when the tubular portion 506 is viewed from above. Further, the length in the width direction of the mounting portion 510 can be made substantially equal to the diameter of the lower outer edge of the tubular portion 506.

  From the edge of each end in the width direction of the mounting portion 510, a low-profile mounting portion 512 that is lower than the mounting portion 510 extends. The height of the low-profile mounting portion 512 is lower than the height of the mounting component 510, and the lowered portion (that is, the upper surface of the low-profile mounting component 512) is covered with an outer insulator 520 as will be described later. . The low-profile mounting part 512 extends in the width direction of the mounting part 510 and can have the same length.

  The center terminal 502 extends from the cylindrical contact portion 501 and the base portion of the contact portion 501 in the entire circumferential direction, and a disc portion 503 whose edge is held by an insulator. A connecting portion 514 extending to the gap 516 is provided. A portion of the center terminal 502 other than the free end of the connection portion 514 is accommodated inside the cylindrical portion 506 of the outer conductor 504. The connecting portion 514 is disposed so as to come out of the tubular portion 506 from one gap 516 at the lower edge of the tubular portion 506.

  The base part of the contact part 501, the back surface of the disk part 503 and the connection part 514 (that is, the back surface of the center terminal 502), and the back surface of the mounting part 510 and the low-profile mounting part 512 (that is, the back surface of the external conductor 504) are It is exposed as the back surface of the coaxial connector 500 for substrates. When the coaxial connector 500 for board is mounted, the connection portion 514 is electrically connected to the board on the exposed back surface.

  FIG. 6B shows an appearance of the board coaxial connector 500 assembled by integrally forming the insulator 508 with the center terminal 502 and the outer conductor 504. In order to simplify the description, the insulator 508 inside the cylindrical portion 506 is referred to as an inner insulator 517, and the insulator 508 outside the cylindrical portion 506 is referred to as an outer insulator 520. A coaxial connector 500 for a substrate according to an embodiment of the present invention includes a center terminal 502 having a contact portion 501, an inner insulator 517 covering the periphery of the center terminal 502, and a contact portion in order from the fitting central axis toward the outer side in the circumferential direction. 501 and the inner side insulator 517 are comprised in the cylindrical part 506 and the extension part extended at right angles with respect to a fitting direction from the lower edge of the cylindrical part 506. The extending portion includes a mounting portion 510, an outer insulator 520, and a low profile mounting portion 512.

  The inner insulator 517 includes a planar portion 518 formed in a planar shape along the inner wall of the cylindrical portion 506, a contact portion 501 of the center terminal 502, and a partial upper surface of a disk portion around the root portion of the contact portion 501. And an exposed portion 509 that exposes the exposed portion 509 and a convex portion 519 that is formed in a convex shape so as to surround the periphery of the exposed portion 509. By forming in this way, the exposed center terminal 502 can be protected by the convex portion 519 of the inner insulator 517. Further, by exposing the contact portion 501 of the center terminal 502, a contact area with the contact portion 304 exposed from the insulator 200 of the coaxial cable connector 400 can be secured.

  In a conventional coaxial cable connector (for example, Patent Document 1 (particularly, FIG. 1)), the bottom surface of the center terminal is covered with an insulator, and the terminal of the coaxial cable connector is fitted to the center terminal of the coaxial connector for board. Therefore, in addition to the thickness of the insulator around the center terminal, a sufficient distance must be secured, which hinders the reduction in the height of the coaxial cable connector. In the structure of the coaxial cable connector 400 and the board coaxial connector 500 according to the present invention, the contact portion 304 of the coaxial cable connector 400 is inserted into the exposed portion 509 that is a space around the center terminal 502 without an insulator. Thus, the coaxial cable connector can be realized with a reduced height.

  The outer insulator 520 is formed so as to cover the upper surface of the low-profile mounting part 512 and the side surfaces on both sides thereof (the side surface on the gap 516 side and the side surface on the opposite side). The surface of the tip portion in the extending direction of the low-profile mounting part 512 (that is, the width direction of the mounting part 510) can be prevented from being covered with the outer insulator 520. That is, the length in the extending direction of the low-profile mounting part 512 and the length in the extending direction of the outer insulator 520 (the width direction of the mounting part 510) can be made the same or substantially the same.

  Further, the height of the outer insulator 520 can be the same as or lower than the height of the mounting portion 510. The total height of the outer insulator 520 that covers the upper surface of the low-profile mounting portion 512 and the low-profile mounting portion 512 can be the same as or lower than the height of the mounting component 510. As described above, the height (ie, the thickness) of the outer insulator 520 or the height (thickness) of the height of the low-profile mounting portion 512 and the height of the outer insulator 520 that covers the low-profile mounting portion 512 are combined. By making the height (thickness) of the mounting portion 510 equal to or less than the same, it is possible to prevent the insulator from being damaged by receiving an unintended pressing force from the outer conductor of the coaxial cable connector.

  In the coaxial connector for a substrate according to an embodiment of the present invention, as shown in FIGS. 4A and 4B, an exposure space lower than the flat portion of the inner insulator is provided around the central conductor, so that the coaxial cable is provided. The height when mated with the connector can be lowered. Further, as shown in FIG. 6A, a gap 516 formed by providing a groove at the lower edge of the cylindrical portion 506 and a low profile extending from the widthwise end of the mounting portion 510, respectively. 6B, the insulator 508 is used so as to fill the gap 516 at the lower edge of the cylindrical portion 506 so as to cover the upper surface and both side surfaces of the low-profile mounting portion 512. Is integrally molded so that the insulator 508 is sandwiched between the lower edge of the cylindrical portion 506 and the upper surface of the low-profile mounting portion 512, and the vertical direction of the external conductor 504 and the insulator 508 ( The coupling in the fitting direction) can be maintained strongly. Further, since the groove formed at the lower edge of the cylindrical portion 506 is filled with the insulator 508 to fill the gap 516 and integrally formed so as to cover both side surfaces of the low-profile mounting portion 512, Direction (horizontal) coupling can also be maintained strongly.

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

  Electrical connectors such as coaxial cable connectors and coaxial connectors for substrates have various uses. For example, they can be used for internal wiring of information equipment and electronic equipment in a wide range of industrial fields such as information communication equipment industry and automobile industry. it can.

DESCRIPTION OF SYMBOLS 100 Outer conductor 102 Cylindrical part 104 Space | gap 106 Support arm part 108 Outer cover part 110 Projection seat part 112,113,114 Groove part 115 Claw part 116 Bending part 118 Cylinder protection cover 119 Conductor protection cover 120 Fixing part 122 Shield wire caulking part 124 Outer crimping portion 128, 134, 138 Protruding portion 126, 136 Side portion 130 Extension portion 200 Insulator 202 Fitting portion 204 Conductor support portion 206 Inner lid portion 208, 209, 210 Protruding portion 212 Locking portion 214 Planar region 216 Side wall 300 Terminal 302 Connection portion 304 Contact portion 308 Bridge portion 316 Curved surface portion 400 Coaxial cable connector 500 Coaxial connector for board 501 Contact portion 502 Central terminal 503 Disc portion 504 External conductor 506 Cylindrical portion 507 Engaging portion 508 Insulator 509 Exposed Part 510 mounting part 512 low profile mounting part 514 connecting part 5 16 Gap 517 Inner insulator 518 Plane portion 519 Convex portion 520 Outer insulator C1 Center conductor C2 Dielectric C3 Shield wire C4 Outer skin

Claims (9)

In the coaxial connector for a board comprising a center terminal, an outer conductor that houses the center terminal, and an insulator that holds the outer conductor and the center terminal apart from each other,
The center terminal has a contact portion that contacts the coaxial cable connector, a disc portion that extends in a radial direction from a base portion of the contact portion, and a connection portion that is provided at a free end of the disc portion,
The outer conductor has a cylindrical portion for fitting with the coaxial cable connector, and an extending portion extending perpendicularly to the fitting direction from the lower edge of the cylindrical portion,
The cylindrical portion has an engaging portion that engages an outer conductor of the coaxial cable connector on an outer wall, and the insulator inside the cylindrical portion is connected to the coaxial connector for the board of the coaxial cable connector. A flat portion capable of restricting excessive entry, and an exposed portion that exposes a partial upper surface of the disk portion around the base portion of the contact portion;
The back surface of the center terminal and the back surface of the extended portion of the external conductor are exposed as the back surface of the coaxial connector for a board ,
The upper surface of the flat portion is at a position higher than the upper surface of the extension portion, and the upper surface of the extension portion is a partial upper surface of the disk portion around the base portion of the contact portion exposed from the exposed portion. A coaxial connector for a board, characterized by being at a higher position . The coaxial connector for a board according to claim 1 , further comprising a protruding protrusion at a boundary between the exposed portion and the flat portion. The extending portion includes a mounting portion extending perpendicularly to the fitting direction from the lower edge of the cylindrical portion, and a lower height than the mounting portion extending from the end edge of the mounting portion. The coaxial connector for a board according to claim 1 or 2 , comprising a back mounting portion and an insulator covering at least an upper surface of the low-profile mounting portion. The coaxial connector for a board according to claim 3 , wherein a height dimension of the low-profile mounting part whose upper surface is covered with the insulator is equal to or less than a height dimension of the mounting part. In the coaxial connector for a board comprising a center terminal, an outer conductor for accommodating the center terminal inside, and an insulator for holding the outer conductor and the center terminal apart from each other,
The center terminal has a contact portion that contacts the coaxial cable connector, and a connection portion that connects to the substrate,
The outer conductor has a cylindrical portion for fitting with the coaxial cable connector, and a planar mounting portion for mounting on a substrate,
The mounting portion extends from the lower edge of the cylindrical portion perpendicular to the fitting direction,
The mounting portion has a gap at least at one place, and the connection portion of the center terminal can be extended in a direction perpendicular to the fitting direction in the gap,
The mounting portion extends a low-profile mounting portion that is lower than the mounting portion from an edge of the mounting portion,
The coaxial connector for a board according to claim 1, wherein the insulator is formed so as to fill the gap in the cylindrical portion, cover the connecting portion, and cover the low-profile mounting portion. The coaxial connector for a board according to claim 5 , wherein a height dimension of the low-profile mounting part whose upper surface is covered with the insulator is equal to or less than a height dimension of the mounting part. The coaxial connector for a board according to claim 6 , wherein the low-profile mounting portion extends from both ends of the mounting portion on the gap side. The coaxial connector for a board according to claim 7 , wherein the mounting portion extends in the opposite direction from the lower edge of the cylindrical portion with the gap therebetween. The width direction of the mounting portion is a direction connecting one side of the gap to the other,
The coaxial connector for a board according to claim 5 , wherein a distance from one end of the mounting portion in the width direction to the other end is equal to a diameter of a lower outer edge of the cylindrical portion.

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