JP2009104836A - Connector plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a connector plug wherein a plug side socket-shaped core conductor detachably engaged with a receptacle side pin-shaped core conductor is surely held by an insulating housing. <P>SOLUTION: With respect to a receptacle connector equipped with a pin-shaped core conductor disposed on a first substrate, a first cylindrical outside conductor covering its circumference, and a first insulating housing to insulate and hold the pin-shaped core conductor and the first cylindrical outside conductor, this connector plug detachably connected to the receptacle to form conduction with each of the core conductor and the outside conductor is disposed on a second substrate. This connector plug is equipped with a socket-shaped core conductor to get engaged with the pin-shaped core conductor, a second cylindrical outside conductor to get engaged with the first cylindrical outside conductor in an inscribed or circumscribed state, a second insulating housing to insulate and hold the socket-shaped core conductor and the second cylindrical outside conductor. The socket-shaped core conductor comprises a metal tube having a collar part at its rear end part, and the rear end part having the collar part is embedded in an insulating resin serving as the second insulating housing. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector plug for the purpose of signal transmission between substrates in a mobile communication device, for example, and more particularly to a microstrip connector plug for connecting a substrate having a microstrip that becomes a high-frequency signal transmission path instead of a coaxial cable. It is about.

  A coaxial inter-board connector for connecting between opposing circuit boards mounted on an electronic device such as a mobile phone has already been proposed (see, for example, Patent Document 1). Such an inter-board connector is a connector that has no receptacle on the first board and directly contacts the circuit board. Since there is no receptacle, it can be manufactured at low cost, but the connector pins are expensive, the height of the connector is high, and the distance between the substrates, which is a recent market requirement, is not 1 mm or less.

  In addition, as portable communication devices and electronic devices become smaller and thinner, there is an increasing demand for smaller and thinner connectors between receptacles and plugs. As described above, the height of all electronic components has increased. There is a demand of 1 mm or less. For this reason, an L-shaped coaxial connector that reduces the height when connected has already been proposed (see, for example, Patent Documents 2 and 3).

JP-A-8-236227 JP-A-11-307158 JP 2001-43939 A

  In recent years, with the enhancement of functionality of portable communication devices and electronic devices, a large number of coaxial cables that transmit a plurality of types of high-frequency signal generation sources to a substrate have been disposed inside. Therefore, even as the L-shaped coaxial connector of Patent Documents 2 and 3, it is necessary to arrange a large number of coaxial cables in the main body of a portable communication device or an electronic device. It was not possible to cope with. In addition, with respect to the socket-like core wire conductor on the plug side, by repeatedly attaching and removing, the connection between the insulator and the socket-like core wire conductor is loosened, and the core wire conductor is wobbled, resulting in poor conduction.

  Furthermore, the connector composed of the receptacle and the plug is as small as about 2 mm square, and there is a problem that it is difficult to assemble the connector receptacle and the plug itself. In addition, when using a transmission line instead of a coaxial cable for transmitting high-frequency signals, etc., if the impedance changes for each product due to changes in assembly accuracy or conditions, the reliability of the product is reduced. There was also.

  An object of the present invention is to obtain a connector plug for the purpose of reducing the height of wiring including a connector in order to reduce the thickness of portable communication devices and electronic devices. It is another object of the present invention to obtain a connector plug in which a socket-side core wire conductor on the plug side that is detachably fitted to a pin-side core wire conductor on the receptacle side is securely held in an insulating housing. Another object of the present invention is to obtain a connector plug that can be manufactured at low cost in large quantities by reducing the number of assembly steps, improving mechanical strength, and assembling accuracy by insert molding.

According to a first aspect of the present invention, a connector plug includes: a pin-shaped core conductor disposed on a first substrate; a first cylindrical outer conductor covering the periphery of the core conductor; a pin-shaped core conductor; A receptacle connector having a first insulating housing that insulates and holds one cylindrical outer conductor is detachably connected to the receptacle to form electrical continuity with the core conductor and the outer conductor. A connector plug disposed on two substrates,
A socket-shaped core conductor that fits with the pin-shaped core conductor, a second cylindrical outer conductor that fits in an inscribed or circumscribed state with the first cylindrical outer conductor, a socket-shaped core conductor, and a second cylindrical outer conductor A second insulating housing that insulates and holds
The socket-shaped core wire conductor is composed of a metal tube having a collar at the rear end,
A rear end portion provided with a flange portion is embedded in an insulating resin serving as the second insulating housing.

  A connector plug according to a second aspect of the present invention is characterized in that the socket-shaped core conductor according to the first aspect has a flange formed at the rear end by drawing.

  A connector plug according to a third aspect of the invention is characterized in that the second insulating housing according to the first or second aspect is integrally formed with the socket-shaped core conductor by insert molding. .

  According to the present invention, a connector plug that can reduce the thickness of a portable communication device or an electronic device can be obtained by transmitting a high-frequency signal using a flexible printed board instead of using a coaxial cable. Further, it is possible to obtain a connector plug in which the socket-side core wire conductor on the plug side that is detachably fitted to the pin-side core wire conductor on the receptacle side is securely held in the insulating housing. Furthermore, insert molding can reduce assembly man-hours, improve mechanical strength and assembly accuracy, and can provide a connector plug that can be manufactured in large quantities at low cost.

  In the present invention, the socket-shaped core conductor of the connector plug that is detachably fitted to the pin-shaped core conductor of the receptacle connector is formed of a metal tube having a flange at the rear end, and the rear end having the flange Is embedded in an insulating resin serving as a second insulating housing. As a result, the pin-shaped core wire conductor of the receptacle connector and the socket-shaped core wire conductor made of the metal tube of the connector plug are securely fitted, and the flange portion is formed at the rear end of the metal tube of the socket-shaped core wire conductor. Therefore, since the flange portion is embedded in the second insulating housing, the socket-like core wire conductor on the plug side is securely held and integrated with the second insulating housing, and the second insulating housing and the socket-like core wire conductor are integrated. The connection is not loosened and the core conductor does not wobble, causing poor conduction.

  In the present invention, a receptacle connector disposed on a first substrate includes a pin-shaped core conductor, a cylindrical first outer conductor covering the periphery of the pin-shaped core conductor, a pin-shaped core conductor, and a first cylindrical conductor. The connector may be a minimal receptacle having a first resin housing that insulates and holds the outer conductor. Such a receptacle connector is already commercially available, and this commercially available receptacle terminal may be used.

  The connector plug of the present invention may be a very small plug connector that is detachably connected to the receptacle connector in order to form electrical continuity with the pin-shaped core conductor and the first cylindrical outer conductor with respect to the receptacle connector. A socket-shaped core conductor that fits with the pin-shaped core conductor, a second cylindrical outer conductor that fits in an inscribed or circumscribed state with the first cylindrical outer conductor, a socket-shaped core conductor, and a second cylinder And a second insulating housing that insulates and holds the outer conductor, and may be disposed on the second substrate so as to face the receptacle connector.

  The socket-shaped core wire conductor of the present invention may be any metal that is fitted with the pin-shaped core wire conductor of the receptacle connector and is provided with a flange at the rear end, such as cutting, casting or sheet metal processing. Although it can also be created by a molding method, the preferred embodiment is a drawing process, more specifically, a metal plate produced by press drawing, and a large amount of homogeneous socket-shaped core conductors are manufactured at low cost. can do.

  The connector plug of the present invention can be used as a transmission path for passing a high-frequency signal by arranging it between flexible printed boards that transmit a high-frequency signal instead of a coaxial cable. In this case, the core conductor may be read as the central conductor in consideration of the characteristic impedance of the connector by arranging the core conductor of the connector plug of the present invention at the center of each insulating housing. In the following description, a core conductor is a central conductor, and a connector plug is provided on a flexible printed board that transmits a high-frequency signal instead of a coaxial cable.

  Therefore, in detail, the connector plug of the present invention is connected to the pin-shaped center conductor connected to the signal circuit on the first board and the ground circuit on the first board held in an insulated state around the center conductor. A connector plug corresponding to a receptacle connector having a first cylindrical outer conductor, a socket-shaped central conductor connected to a signal circuit of a second substrate and detachably fitted to the pin-shaped central conductor; A structure having a second cylindrical outer conductor that is connected to a ground circuit of the substrate and is detachably fitted to the first cylindrical outer conductor.

  Preferably, in the receptacle connector, a center conductor joint that joins the signal circuit of the first board extends from the pin-shaped center conductor, and a part of the side wall of the first cylindrical outer conductor extends to the ground circuit of the first board. The outer conductor joint to be joined is extended. Similarly, in the connector plug, the socket-shaped center conductor extends from the part of the flange portion to the center conductor joint where the socket-shaped center conductor is joined to the signal circuit of the second board, and the second cylindrical outer conductor. An outer conductor joining portion that joins to the ground circuit of the second substrate extends from a part of the side wall. Each of these joints is formed by stamping together a part that becomes a joint when stamping from a metal plate.

  Furthermore, the socket-shaped center conductor of the connector plug is preferably formed with one or more slits parallel to the axis of the metal tube at the tip facing the pin-shaped center conductor. Thereby, when fitting with the pin-shaped center conductor on the receptacle side, the outer diameter of the pin is made slightly larger than the inner diameter of the metal tube at the tip of the socket-shaped center conductor, so that a good fit is obtained. In addition, this slit can be formed in the process before giving a metal pipe provided with the collar part by giving a press drawing process to a metal plate. The number of slits is at least one, and the optimum number of slits may be determined from the contact pressure with the pin-shaped receptacle-side core conductor, contact resistance, galling resistance, and the like.

  As the second insulating housing for holding the socket-shaped central conductor of the connector plug of the present invention, the socket-shaped central conductor is formed by embedding the flange portion of the rear end portion of the socket-shaped central conductor in the insulating resin serving as the second insulating housing. Assembling the two parts, the first and second insulating housings, facilitates assembly of the connector plug. Preferably, the second insulating housing is formed integrally with the socket-shaped center conductor by insert molding. As a result, the rear end portion of the socket-shaped center conductor formed with the flange portion is embedded in the insulating resin serving as the second insulating housing by insert molding and formed integrally therewith. 2 It is held by an insulating housing and integrated. For this reason, high quality parts can be manufactured in large quantities and at low cost.

  The second cylindrical outer conductor on the plug side of the present invention only needs to have a cylindrical structure that fits with the first cylindrical outer conductor on the receptacle side. In addition, the conductor disposed outside in the fitting of the first cylindrical outer conductor on the receptor side and the second cylindrical outer conductor on the plug side of the present invention is preferable in order to facilitate the fitting / removing. Form one or more slits parallel to the axis of the cylinder at the tip of the outer conductor. Note that the number of slits is at least one, and the optimum number of slits may be determined from the contact pressure with the inner cylindrical outer conductor, contact resistance, galling resistance, and the like.

  In addition, the second insulating housing disposed in the second cylindrical outer conductor on the plug side of the present invention and the socket-shaped central conductor integrated therewith are securely fixed, and the distal end side of the second insulating housing and Each of the rear end sides is provided with an engaging structure that engages with the second cylindrical outer conductor.

  For example, if the second cylindrical outer conductor is fitted to the outside of the first cylindrical outer conductor, the side wall of the second cylindrical outer conductor is attached to the slit formed in the second cylindrical outer conductor. A bent piece obtained by bending a part of the second insulating housing is engaged with the front end surface of the second insulating housing. This prevents the movement of the second insulating housing in the distal direction.

  Further, one or more projecting pieces project from the rear end of the second cylindrical outer conductor, and the bent pieces bent inward are engaged with the rear end surface of the second insulating housing. Thereby, the movement in the rear end direction of the second insulating housing is prevented. In addition, if the groove | channel where each bending piece fits in the front end surface and / or rear end surface of a 2nd insulation housing, rotation of the axial direction of the cylinder of a housing is also prevented with a bending piece and a groove | channel.

  Further, if a part of the second insulating housing is arranged with a gap with respect to the second cylindrical outer conductor, the transmission for transmitting a high-frequency signal by changing the arrangement, size and shape of the notch portion The impedance adjustment as a road becomes easy, and once the shape of the insulating housing is determined by insert molding with a mold, once it is determined, it can be stably mass-produced.

  The connector plug of the present invention has a socket-like center conductor by injecting an insulating resin into the mold, and a mold placement step of placing the flanged rear end portion of the metal tube serving as the socket-like center conductor in the mold. A molding step for integrally insert-molding the conductor and the second insulating housing; and an attaching step for disposing and mounting an integrally molded body of the socket-shaped center conductor and the second insulating housing inside the cylindrical second cylindrical outer conductor; Manufactured by. Thereby, it can manufacture in large quantities at low cost by insert molding.

  In the manufacturing method of the connector plug of the present invention, the socket-shaped central conductor and the second insulating housing are integrated before being combined with the second cylindrical outer conductor. Specifically, the rear end portion including the flange portion of the socket-shaped center conductor is integrated with the second insulating housing. The preferred production for this is insert molding. That is, a rear end portion having a flange portion of a metal tube serving as a socket-shaped central conductor is disposed in a mold, and an insulating resin is injected into the mold, thereby connecting the socket-shaped central conductor and the second insulating housing. One-piece molding.

  In this case, it is important to accurately arrange the socket-shaped center conductor at a predetermined location of the mold. Since the socket-shaped center conductor is made of a metal tube having a flange at the rear end, for example, a position fixing rod member provided in the mold is inserted into the metal tube to accurately support the front end surface of the metal tube. As a result, the axial height of the bar member is determined, so that reliable insert molding is possible. Various forms of the position fixing rod member provided in the mold are considered. For example, in the case of being arranged through the metal tube, in the case of being arranged only at the front end portion of the metal tube, the metal tube may be arranged at the front end portion and the rear end portion.

  When the rod member is arranged through the metal tube, the through hole is formed in the second insulating housing so as to communicate with the inner tube of the metal tube. However, when the mold is opened, the rod member is removed from the metal tube. There are concerns about problems such as difficulty in detaching. Moreover, when it arrange | positions only at the front-end | tip part of a metal tube, when injecting insulating resin, there exists a concern that there exists a possibility that a socket-like center conductor may move within a metal mold | die. Therefore, it is preferable to perform insert molding by arranging two rod members at the front end portion and the rear end portion of the metal tube and securely holding the socket-shaped central conductor in the mold by the two rod members. Needless to say, any bar member may be used as long as it solves the above-mentioned problem.

  Moreover, since the center conductor junction part which joins with the signal circuit of a 2nd board | substrate is preferably extended from the part of a collar part to the socket-shaped center conductor, this junction part should be arrange | positioned outside a metal mold | die. Accordingly, the mold itself can be held so as not to rotate the joint, and the rotational position of the joint relative to the rod member inserted into the metal tube can be accurately determined.

  Furthermore, in the manufacturing method of the present invention, since the socket-shaped center conductor and the second insulating housing are integrated in advance, reduction in assembly man-hours, mechanical strength, and improvement in assembly accuracy are achieved. Substantially mechanical assembly is an attachment step in which the integrated socket-shaped central conductor and the second insulating housing are arranged and attached in the cylinder of the second cylindrical outer conductor.

  This attachment step is performed by a socket-shaped central conductor integrated with a plate material to be a second cylindrical outer conductor punched into a predetermined shape or a second cylindrical outer conductor preliminary formed to some extent in the shape of the second cylindrical outer conductor. And the second insulating housing are arranged in the cylinder of the second cylindrical outer conductor, and pressure is applied from the outside to the inside to deform the protruding piece of the second cylindrical outer conductor shape into a bent piece.

  FIG. 1 is an explanatory view showing a cross-sectional configuration of an embodiment of a connector plug and a receptacle connector of the present invention. FIG. 2 is an explanatory view showing the configuration of the connector plug of FIG. FIG. 3 is an explanatory view showing a configuration of the socket-shaped core wire conductor and the second insulating housing integrated with the connector plug of FIG. FIG. 4 is an explanatory view showing a configuration of a second cylindrical outer conductor of the connector plug of FIG.

  As shown in FIGS. 1A and 1B, the connector 10 of this embodiment includes a very small receptacle connector 11 of about 2 mm square disposed on a first substrate 1 disposed inside a portable communication device or the like, It consists of a very small connector plug 21 of about 2 mm square disposed on the second substrate 2 disposed inside a portable communication device or the like that is detachably fitted thereto.

  The receptacle 11 disposed on the first substrate 1 includes a pin-shaped pin-shaped central conductor (core conductor) 12, a first cylindrical outer conductor 13 covering the periphery of the central conductor 12, the pin-shaped central conductor 12, A first insulating housing 14 that insulates and holds one cylindrical outer conductor 13 is formed. A groove 15 is formed in the circumferential direction at a substantially central portion of the outer surface of the cylindrical body of the first cylindrical outer conductor 13 protruding from the first insulating housing 14. Although not shown, the pin-shaped central conductor 12 is connected to the signal circuit of the first substrate 1, and the first cylindrical outer conductor 13 is connected to the ground circuit of the first substrate 1 with solder or the like.

  As shown in FIGS. 1 and 2, the plug 21 disposed on the second substrate 2 circumscribes the socket-shaped center conductor (core conductor) 22 that fits with the pin-shaped center conductor 12 and the first cylindrical outer conductor 13. It comprises three members: a second cylindrical outer conductor 23 fitted in a state, and a second insulating housing 24 that insulates and holds the socket-shaped central conductor 22 and the second cylindrical outer conductor 23. Although not shown, the socket-shaped central conductor 22 is connected to the signal circuit of the second substrate 2, and the second cylindrical outer conductor 23 is connected to the ground circuit of the second substrate 2 by solder or the like.

  As shown in FIGS. 2 and 3, the tip of the socket-shaped center conductor 22 is made of a metal tube having an inner diameter substantially the same as the outer diameter of the pin of the pin-shaped center conductor 12, and the rear end thereof is expanded in diameter. Part 25 is configured. A part of the flange portion 25 is extended to form a central conductor joint portion 26 outside the second cylindrical outer conductor 23 and connected to the signal circuit of the second substrate 2. Four slits 27 are formed at the tip of the socket-shaped center conductor 22 so as to face each other in parallel to the axis of the metal tube.

  In the second insulating housing 24, the flange 25 at the rear end of the socket-shaped central conductor 22 is embedded in the insulating body, and the two parts of the socket-shaped central conductor 22 and the second insulating housing 24 are integrated by insert molding.

  A concentric groove 28 is formed on the distal end surface side of the second insulating housing 24 so as to surround the socket-shaped central conductor 22. The groove 28 is formed for adjusting the impedance between the connectors, and the gap for adjusting the impedance is not limited to the concentric groove 28, and is formed, for example, at equal intervals on the peripheral edge of the insulator. May be. Further, around the front end surface side of the second insulating housing 24, latching grooves 29 are formed at three positions, that is, a position facing the central conductor joint portion 26 and a position orthogonal to the surface connecting these.

  As shown in FIGS. 2 and 4, the second tubular outer conductor 23 is formed with a protrusion 31 that engages with the groove 15 of the receptacle 11 on the inner peripheral wall of the distal end portion of the tubular body 30. Further, an opening 32 is formed on the rear surface of the cylindrical main body 30 to guide the central conductor joint 26 to the outside of the second cylindrical outer conductor 23, and the opening 32 does not contact the central conductor joint 26. Thus, it is drilled in a larger shape than the center conductor joint portion 26.

  Further, the outer conductor joining portion 33 extends from the opposing position perpendicular to the line connecting the opening 32 and the axis of the cylindrical main body 30 to both sides in the cylindrical main body 30. The outer conductor joint 33 is connected to the ground circuit of the second substrate 2. Further, at the rear end portion of the cylindrical main body 30, four rear end bent pieces 34 that are hooked on the rear end surface of the second insulating housing 24 and prevent the rearward movement of the housing 24 are arranged at equal intervals. ing.

  Further, three slits 35 parallel to the axial direction of the cylindrical body are formed from the distal end of the cylindrical main body 30 of the second cylindrical outer conductor 23 to a substantially central position. The three slits are formed at three positions, the position facing the opening 32 and the position orthogonal to the plane connecting them, and the front end bent piece 36 that engages with the retaining groove 29 at the rear end of the slit 35. To prevent the housing 24 from moving forward.

  In manufacturing the plug 21 of this embodiment, the socket-shaped center conductor 22 and the second cylindrical outer conductor 23 are formed in advance. The second cylindrical outer conductor 23 punches the metal tube into a predetermined shape and simultaneously bends the outer conductor joint portion 33 to form the cylindrical main body 30. At this time, only the projecting piece 36a to be the front end bent piece 36 is bent, and the projecting piece 34a to be the rear end bent piece 34 is not bent (see FIG. 4).

  The socket-shaped center conductor 22 is press-drawn on a metal plate to obtain a metal tube having a collar portion, and then punched into a predetermined shape, and at the same time, the protruding projecting portion is bent to form the center conductor joint portion 26. Form it. The slit 27 is formed before being punched to obtain a metal tube.

  Next, the second insulating housing is integrally formed by insert molding using the socket-shaped center conductor 22. Specifically, a rod member for fixing the position is inserted into the tip of the metal tube of the socket-shaped center conductor 22 and is placed in a mold so as to accurately support the tip of the metal tube, thereby increasing the axial height of the rod member. The direction of rotation with respect to the bar member is determined so that the center conductor joint 26 is disposed outside the mold. By injecting insulating resin into the mold, the socket-shaped central conductor 22 and the second insulating housing 24 are integrally formed by insert molding.

  A rear end bent piece is formed by a press after the integral molded body of the socket-shaped central conductor 22 and the second insulating housing 24 integrated by insert molding is disposed inside the cylindrical main body 30 of the second cylindrical outer conductor 23. The plug 21 is manufactured by an attaching process in which the projecting piece 34a to be 34 is bent and attached.

It is explanatory drawing which shows the cross-sectional structure of one Example of the connector plug and receptacle connector of this invention, a figure shows the state which is not fitted, and b figure shows the state fitted. 2A and 2B are explanatory views showing a configuration of the connector plug of FIG. 1, in which FIG. A is a plan view, FIG. B is an AA sectional view, FIG. It is explanatory drawing which shows the structure of the socket-shaped core wire conductor with which the connector plug of FIG. 2 was integrated, and a 2nd insulation housing, a figure is a top view, b figure is CC sectional drawing, c figure is DD Sectional drawing and d figure are rear views. It is explanatory drawing which shows the structure of the 2nd cylindrical outer conductor of the connector plug of FIG. 2, a figure is a top view, b figure is EE sectional drawing, c figure is a right view, d figure is FF sectional drawing FIG.

Explanation of symbols

10 ... Connector,
11 ... Receptacle connector,
12 ... Pin-shaped central conductor (core conductor),
13 ... 1st cylindrical outer conductor,
14 ... 1st insulation housing,
15 ... groove,
21 ... Plug connector,
22: Socket-shaped central conductor (core conductor),
23 ... second cylindrical outer conductor,
24. Second insulating housing,
25 ... Buttocks,
26 ... center conductor joint,
27 ... Slit,
28 ... Concentric grooves,
29 ... Hook groove,
30 ... cylindrical body,
31 ... protrusions,
32 ... opening,
33 ... outer conductor joint,
34. Rear end bent piece,
34a ... projecting piece,
35 ... Slit,
36 ... front end bent piece,
36a ... projecting piece,

Claims (3)

A pin-shaped core conductor disposed on the first substrate, a first cylindrical outer conductor covering the periphery of the core conductor, and a first insulation that insulates and holds the pin-shaped core conductor and the first cylindrical outer conductor A connector plug disposed on a second substrate detachably connected to the receptacle to form electrical continuity with each of the core conductor and the outer conductor with respect to a receptacle connector including a housing;
A socket-shaped core conductor that fits with the pin-shaped core conductor, a second cylindrical outer conductor that fits in an inscribed or circumscribed state with the first cylindrical outer conductor, a socket-shaped core conductor, and a second cylindrical outer conductor A second insulating housing that insulates and holds
The socket-shaped core wire conductor is composed of a metal tube having a collar at the rear end,
A connector plug, characterized in that a rear end portion provided with a flange portion is embedded in an insulating resin serving as the second insulating housing.   The connector plug according to claim 1, wherein the socket-shaped core wire conductor has a flange formed at a rear end portion thereof by drawing.   The connector plug according to claim 1 or 2, wherein the second insulating housing is formed integrally with the socket-shaped core conductor by insert molding.

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