JP5408433B2 - Electrical connector - Google Patents

Description

  The present invention relates to an electrical connector used by being mounted on a printed wiring board.

  In general, in various electronic devices or electric devices such as mobile phones, terminal portions of various signal transmission media composed of fine coaxial cables, flexible wiring boards, printed wiring boards, etc. are connected to the printed wiring board side using electrical connectors. (See, for example, Patent Document 1 below). The function of the electrical connector at that time is to transmit a necessary signal through the signal line, and to connect the shield signal for ground through the shield line to the ground circuit through an appropriate ground member.

  In addition, in an electrical connector used on a printed wiring board, for example, a receptacle connector, a fitting portion to which a mating connector such as a plug connector is fitted is provided in the insulating housing, and the insulation A number of conductive contacts are arranged in a multipolar shape along the longitudinal direction of the housing, and a conductive shell is attached to the insulating housing so as to cover the insulating housing and conductive terminals (contacts). Has been. A solder connection portion (hold down) extending toward the printed wiring board side is provided at an edge portion of the conductive shell, and the solder connection portion is joined to a conductive path on the printed wiring board. Electrical connection is made.

  On the other hand, in such an electrical connector, in recent years, the number of conductive terminals (contacts) has been increased, and the length required to arrange these multiple conductive terminals in a multipolar shape tends to increase. At the same time, there is an increasing demand for thinner connectors, that is, lower profiles. However, when the electrical connector is multipolarized and reduced in height, the strength of the entire connector tends to be reduced, and there is a risk of deformation such as warping when the mating plug connector is removed.

  In addition, since the solder connection part (hold down) provided on the conductive shell is arranged so as to protrude from the edge of the conductive shell, the conductive shell and the solder connection part are formed from an integral material. Often to do. In the material removal in that case, the material around the solder connection portion protruding from the conductive shell is discarded, which is one of the causes of an increase in manufacturing cost because a so-called yield is lowered.

  Further, in a mating connector such as a plug connector, in order to meet the above-described demand for a low profile, means such as abolishing a portion corresponding to the bottom surface of the conductive shell may be employed. Even in such a case, the connector strength tends to decrease, and there is a risk of causing problems such as deformation (for example, see Patent Document 2 below).

JP 2008-97875 A JP 2009-4117 A

  Therefore, the present invention can obtain a good shielding effect as before with a simple configuration, improve the strength of the entire connector, and improve the yield of the conductive shell to increase the productivity. An object of the present invention is to provide an electrical connector.

  In order to achieve the above object, according to the present invention, the bottom of an insulating housing having a fitting portion to which a mating connector is fitted is mounted on a printed wiring board and used. A shell bottom portion that covers at least a part of the bottom portion of the insulating housing, and a shell side wall portion that rises from the shell bottom portion at both longitudinal end portions of the conductive shell and constitutes a part of the fitting portion And an electrical connector including a solder connection portion (holddown) that extends from the edge portion of the shell bottom portion toward the printed wiring board side and is connected, wherein the shell side wall portion is the shell bottom portion. A pair of struts that rise continuously from the base, and the pair of struts are in a direction substantially perpendicular to the longitudinal direction of the conductive shell. Together they are arranged between, between portions of the pair of support portions with each other, the configuration wherein the solder connection portions (holddown) is disposed is employed.

  According to the present invention having such a configuration, the pair of support portions provided on the shell side wall portion constituting the fitting portion with the mating connector are connected to the solder connection portion (hold down) fixed to the printed wiring board side. ), The distance from the shell side wall (working point) where the load is applied when the mating connector is mated / unplugged to the solder connection (fulcrum) is extremely high. Since the moment force on the solder connection portion when the mating connector that is a particularly heavy load is removed is significantly reduced, the proof strength of the electrical connector is improved. In addition, at the stage of material removal before bending each part of the conductive shell, it is possible to remove the material of the solder connection portion on a part of the shell side wall portion including the pair of support portions, thereby preventing waste of material. The

  In the present invention, it is desirable that at least one of the pair of support columns is provided with a lock portion that engages with the mating connector and locks the mating connector.

  According to the present invention having such a configuration, since the lock portion for the mating connector is disposed at a position close to the solder connection portion (holddown) fixed to the printed wiring board side, the mating side in particular. Even when a large load is applied to the lock part when the connector is removed, the moment force to the solder connection part (holddown) with the lock part as the action point is reduced, and the mating connector is fitted. The strength of the electrical connector in the joint operation is improved.

  Further, in the present invention, the conductive shell is provided with a shell spring for ground contact that is cut and raised part of the conductive shell so as to come into contact with the mating connector, It is desirable that the conductive shell is disposed adjacent to the solder connection portion (hold-down) in the longitudinal direction of the conductive shell or in the direction perpendicular thereto.

  According to the present invention having such a configuration, since the shell spring for ground contact is disposed at a position close to the solder connection portion (hold down) bonded and fixed to the printed wiring board side, the shell spring The electrical resistance from the solder to the solder connection (hold down) is reduced, and the ground performance is improved.

  Further, in the present invention, the mating connector includes a ceiling portion having a substantially rectangular plane shape, a standing wall portion formed so as to be bent continuously in three directions of an outer peripheral edge portion of the ceiling portion, and the standing walls. It is desirable to have a bottom wall portion that is continuously bent so that the portion is substantially parallel to the ceiling portion.

  According to the present invention having such a configuration, the rigidity of the mating connector is improved by the bending structure of the standing wall portion and the bottom wall portion, and the slide assembly of the housing between the three wall standing wall portions and the bottom wall portion is performed. As a result, the assemblability is improved compared to the conventional assembly by press fitting.

  As described above, in the present invention, the pair of support portions provided on the shell side wall portion that constitutes the mating portion with the mating connector are connected to both sides of the solder connection portion (hold down) fixed to the printed wiring board side. The distance from the shell side wall (operation point) to the solder connection (fulcrum) where the load is applied during the mating / unmating operation of the mating connector is greatly reduced. When the connector is removed, the moment force on the solder connection part (holddown) is suppressed to a very small level to improve the strength of the electrical connector, and at the stage of material removal before bending each part of the conductive shell, Since it is possible to remove the material of the solder connection part (hold down) on a part of the shell side wall part including the support part of the material, waste of the material is prevented. Do configured by can increase productivity it is possible to improve the strength of the entire connector can be inexpensively performing multipolar and low profile electrical connector.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an external perspective explanatory view showing a connector assembly in which a plug connector and a receptacle connector according to a first embodiment of the present embodiment are fitted from the front side. It is a cross-sectional explanatory drawing along the II-II line in FIG. FIG. 3 is an external perspective explanatory view showing a state in which a thin coaxial cable as a signal transmission medium is connected to a plug connector used in the connector assembly shown in FIGS. 1 and 2 from the rear side of the plane. FIG. 4 is an external perspective explanatory view showing the plug connector connected with the thin coaxial cable shown in FIG. 3 from the bottom rear side. FIG. 5 is a cross-sectional explanatory view corresponding to FIG. 2 in the plug connector shown in FIGS. 3 and 4. FIG. 6 is an external perspective explanatory view showing a state before the slide assembly of the plug connector shown in FIGS. 3 to 5 from the front side of the plane. FIG. 6 is an external perspective explanatory view showing a state during the slide assembly of the plug connector shown in FIGS. 3 to 5 from the front side of the plane. FIG. 8 is an external perspective explanatory view showing the structure of a conductive shell used in the plug connector shown in FIGS. 3 to 7 from the bottom front side. FIG. 3 is an external perspective explanatory view showing the receptacle connector used in the connector assembly shown in FIGS. 1 and 2 from the plane front side. FIG. 3 is an external perspective explanatory view showing the receptacle connector used in the connector assembly shown in FIGS. 1 and 2 from the rear side of the plane. FIG. 3 is an external perspective explanatory view showing a receptacle connector used in the connector assembly shown in FIGS. 1 and 2 from the bottom rear side. FIG. 3 is a cross-sectional explanatory view corresponding to FIG. 2 in the receptacle connector used in the connector assembly shown in FIGS. 1 and 2. FIG. 10 is an external perspective explanatory view showing an enlarged longitudinal end portion of the receptacle connector shown in FIG. 9. It is an external appearance perspective explanatory drawing which expanded and represented the longitudinal direction one end part of the receptacle connector shown by FIG.

  Hereinafter, a description will be given in detail of an embodiment in which the present invention is applied to a vertical fitting type electrical connector for connecting a plurality of thin coaxial cables to a printed wiring board side based on the drawings.

[Electric connector assembly]
First, an electrical connector assembly according to an embodiment of the present invention shown in FIG. 1 and FIG. A vertical fitting type connector comprising a plug connector 20 as a side connector is configured.

  When these connectors 10 and 20 are fitted together, first, a terminal of a signal transmission medium comprising a thin coaxial cable (refer to symbol SC in FIGS. 3 and 4) or the like at one end edge of a plug connector 20 as a mating connector. The parts are connected, and the plug connector 20 is arranged at a position immediately above the receptacle connector 10 in the connected state. Then, the plug connector 20 is lowered toward the lower side of FIG. 1 substantially orthogonal to the printed wiring board P, and a convex fitting portion (described later) of the plug connector 20 is inserted into a concave fitting portion (described later) of the receptacle connector 10. Is inserted into the two connectors 10 and 20. In the following, the direction in which the plug connector 20 is inserted is defined as the downward direction, and the removal direction in which the plug connector 20 is removed is defined as the upward direction.

  Further, as described above, the signal transmission medium composed of a thin coaxial cable or the like connected to one end edge of the plug connector 20 is arranged so that a plurality of signal transmission media are arranged in a multipolar manner. In the description, the end edge on the side where the signal transmission medium such as the thin coaxial cable is connected is referred to as the “rear end edge”, and the other end on the opposite side is referred to as the “front end edge”. And Similarly, each end edge portion of the receptacle connector 10 corresponding to the rear end edge portion and the front end edge portion of the plug connector 20 is also referred to as a rear end edge portion and a front end edge portion. Furthermore, the respective directions toward the rear edge and the front edge are referred to as “rear” and “front”.

  When the signal transmission medium described above is formed of a thin coaxial cable (see symbol SC in FIG. 3 and FIG. 4), the outer periphery covering material of the end portion of the thin coaxial cable is peeled off to thereby remove the cable center conductor. (Signal line) and the cable outer conductor (shield wire) are exposed so as to be coaxial, and the cable center conductor arranged along the central axis of the thin coaxial cable is a signal conductive terminal (signal The signal circuit is configured by being connected to each of the contacts), and the cable external conductor disposed so as to surround the outer peripheral side of the cable center conductor is connected to a ground member to be described later to configure the ground circuit. It is like that.

[About plug connectors]
Here, as shown in FIGS. 3 to 7, the plug connector 20 as the above-described mating connector extends along the multipolar arrangement direction (hereinafter, referred to as a longitudinal direction) of the thin coaxial cable SC. An insulating plate 21 having an elongated plate shape is provided, and a conductive shell 22 made of a thin metal member that extends in the longitudinal direction is mounted on the insulating housing 21.

  The conductive shell 22 constitutes a part of the ground circuit. In particular, as shown in FIG. 8, the conductive shell 22 has a shell ceiling portion 22a having a substantially rectangular plane, and the shell ceiling. Of the four outer peripheral edge portions of the portion 22a, three sides corresponding to the front edge portion and both side edge portions are bent as described below, and the rear edge portion which is the other one is opened. Has been made.

  That is, in the above-described bending of the three sides of the shell ceiling portion 22a (front edge portion and both side edge portions), first, the edge portion of the shell ceiling portion 22a is continuously bent substantially perpendicularly toward the lower side. . As a result of the bending, the standing wall portion in three directions, that is, the shell front end outer wall portion 22b extending in the longitudinal direction, and the shell side outer wall portions 22c and 22c extending from the both longitudinal ends of the shell front end outer wall portion 22b toward the rear side. And are formed respectively. In addition, the longitudinal direction both ends 22b1 and 22b1 of the shell front end outer wall portion 22b are formed so as to be slightly stepped back to the rear side.

  The shell front end outer wall portion 22b and the lower end portions of both shell side wall portions 22c provided as standing walls in these three directions are continuously bent at a substantially right angle toward the inner side of the connector to form a bottom wall portion. ing. That is, the shell bottom wall portion 22d disposed substantially parallel to the shell ceiling portion 22a is further bent at the lower end portions of the shell front end outer wall portion 22b and the shell side surface outer wall portions 22c as the standing wall portions described above. Are provided by each. As described above, the shell front end outer wall portion 22b, the shell side wall outer wall portions 22c, and the shell bottom wall portion 22d provided on the three sides form an internal space for housing the insulating housing 21 described above. The rear end side of the internal space of the conductive shell 22 is open.

  6 and 7, the elongated plate-like insulating housing 21 is directed toward the inner space of the conductive shell 22 through the open portion on the rear end side of the conductive shell 22 described above. It is made the structure inserted in the front side. In the insertion operation of the insulating housing 21 at this time, the edge portion of the insulating housing 21 is supported and guided by the shell front end outer wall portion 22b, the shell side outer wall portions 22c, and the shell bottom wall portion 22d in the three directions described above. This is done by sliding forward. The sliding with respect to the conductive shell 22 is performed until the locking piece 22e of the conductive shell 22 and the locking hole 21b of the insulating housing 21 are engaged. At this time, although not shown in FIGS. 6 and 7, the thin coaxial cable SC is set in the plug connector 20, and the signal circuit and the ground circuit are already formed.

  In the conductive shell 22, the three shell front end outer wall portions 22 b and both shell side surface outer wall portions 22 c are electrically connected to the mating receptacle connector 10, and the connectors 10, 20. Lock portions that hold the fitting state between each other are provided at a plurality of locations. This point will be described later.

  On the other hand, the insulating projection 21 of the plug connector 20 is provided with a fitting projection 21a extending in the longitudinal direction so as to protrude downward. The fitting convex portion 21a of the plug connector 20 is configured to be inserted downward from the upper side of the receptacle connector 10 which is a mating counterpart. A conductive terminal (contact) 23 is attached to the fitting convex portion 21a, for example, by insert molding from the front end surface (right side in FIG. 5) to the upper surface. The conductive terminals (contacts) 23 are arranged such that a plurality of conductive terminals (contacts) are arranged in a multipolar shape at an appropriate pitch interval along the longitudinal direction of the insulating housing 21. ) Or a ground conductive terminal (shield contact).

  Then, the cable center conductor (signal line) and the cable outer conductor (shield line) of the thin coaxial cable SC as the signal transmission medium are located above the horizontally extending portions of the conductive terminals (contacts) 23. It is set so as to be placed from the side, and each is soldered together along the longitudinal direction, which is the direction of the multipolar arrangement. In addition, signal contact portions that contact conductive terminals (contacts) 13 of the receptacle connector 10 to be described later are formed at the front end portions where these conductive terminals (contacts) 23 extend substantially vertically. The cable outer conductor of the thin coaxial cable arranged in multiple poles is connected to the ground bar GB, and is electrically connected to the connection piece 22f of the conductive shell 22 by soldering or the like, so that a part of the ground circuit is obtained. It is composed.

[Receptacle connector]
On the other hand, the receptacle connector 10 also includes an elongated plate-shaped insulating housing 11 extending along the multipolar arrangement direction (longitudinal direction) of the signal transmission medium (thin coaxial cable) described above. A fitting recess 11a is provided in the central portion so as to extend along the longitudinal direction. In the fitting concave portion 11a, the fitting convex portion 21a provided on the plug connector 20 of the mating partner is inserted from above.

  Also, a conductive shell 12 made of a bent thin metal member that extends in the longitudinal direction is mounted on the insulating housing 11 so as to form a part of the ground circuit. The conductive shell 12 is attached so as to cover the bottom surface portion 11b and the periphery of the insulating housing 11 from above, and surrounds the fitting recess 11a so as to expose the fitting recess 11a. Is arranged.

  A front end edge portion of the conductive shell 12 of the receptacle connector 10 is disposed in a front side (right side in FIG. 12) portion of the fitting recess 11 a described above. That is, the front end edge portion of the conductive shell 12 has a shell front end inner wall portion 12a extending in the longitudinal direction so as to constitute a part of the fitting recess 11a, and a cross section approximately L from the shell front wall portion 12a. A shell front end outer wall portion 12b that is formed in a letter shape and extends to the front side (right side in FIG. 12) is integrally formed.

  Among these, the shell front end inner wall portion 12a is brought into contact with the shell front end outer wall portion 22b of the conductive shell 22 provided in the plug connector 20 and is brought into a fitted state. The longitudinal end portions 22b1 and 22b1 of the shell front end outer wall portion 22b are formed to have a stepped shape toward the rear side. The portions 12a1 and 12a1 are also formed so as to recede slightly rearward to form steps.

  The shell front end inner wall portion 12a on the receptacle connector 10 side is provided with shell springs 12c for ground contacts at a plurality of locations (three locations). These shell springs 12c are configured such that a part of the inner wall portion 12a of the shell front end is cantilevered toward the fitting recess 11a, and the plug connector 20 is fitted from above as described above. When this happens, the shell front end outer wall portion 22b of the plug connector 20 is elastically contacted with the shell spring 12c on the receptacle connector 10 side, and thereby the ground connection is performed.

  Further, the conductive shell 12 on the receptacle connector 10 side has a shell bottom portion 12d that covers the bottom surface portion 11b of the insulating housing 11 from above, but the rear end edge portion and both longitudinal end edges of the shell bottom portion 12d. A plurality of hold-downs 12e projecting outward from the respective edge portions are provided on the portion so as to constitute a solder connection portion. Each hold down (solder connection portion) 12e is formed of a thin plate-like member protruding toward the surface of the printed wiring board P, and is placed on a land of a conductive path formed on the printed wiring board P. In this state, the hold-down 12e is soldered to form a ground circuit.

  Further, the receptacle connector 10 is held by the fixing force of the hold-down (solder connection portion) 12e soldered on the printed wiring board P. Of the plurality of hold-downs 12e, the hold-downs 12e arranged at both end edges in the longitudinal direction are the main part of the present invention, and the structure thereof will be described in detail later.

  Further, on the front side (the right side in FIG. 12) of the fitting recess 11 a of the receptacle connector 10 described above, a large number of conductive terminals (contacts) 13 are arranged at an appropriate pitch interval along the longitudinal direction of the insulating housing 11. They are arranged in a multipolar shape. These conductive terminals 13 are used as signal conductive terminals (signal contacts) or ground conductive terminals (shield contacts), corresponding to the signal or ground of the plug connector 20 described above, as shown in FIG. They are formed and arranged so as to form a substantially horizontal S shape in a side view.

  Solder connection pieces 13 a extending substantially horizontally are provided at the front end portions (rightward side in FIG. 12) of the respective conductive terminals (contacts) 13. Each of the solder connection pieces 13a is formed so as to extend substantially horizontally forward toward the printed wiring board P, and is placed on a land portion of a conductive path formed on the printed wiring board P. In this state, soldering is performed to form a signal circuit or a ground circuit, and the receptacle connector 10 is held by the fixing force of the solder connection piece 13a.

  Each of the conductive terminals (contacts) 13 is provided with a contact portion 13b that elastically protrudes toward the fitting recess 11a described above. Each of the contact portions 13b is formed to be bent so as to form a small protrusion. When the above-described plug connector 20 is fitted into the receptacle connector 10, the contact portion 13b is electrically connected to the plug connector 20 side. A contact portion (not shown) provided on the terminal (contact) 23 is pressed into contact with the terminal 23 to thereby make an electrical connection.

  Next, the structure regarding the longitudinal direction both ends of the receptacle connector 10 which is the principal part of this invention is demonstrated.

  First, as described above, the shell bottom portion 12d provided on the conductive shell 12 is disposed so as to cover the bottom surface portion 11b of the insulating housing 11 from the upper side, and at both longitudinal end edges of the shell bottom portion 12d. An integrally provided hold-down (solder connection portion) 12e protrudes outward toward the surface of the printed wiring board P. Each of the holddowns 12e is formed of a thin plate-like member having a substantially planar shape, and the holddowns 12e are soldered in a state where they are placed on the lands of the conductive paths formed on the printed wiring board P. As a result, a ground circuit is formed.

  Further, shell side walls 12f raised so as to be bent at substantially right angles from both edge portions of the shell bottom 12d are provided at both longitudinal ends of the shell bottom 12d provided on the conductive shell 12, respectively. Yes. These shell side wall portions 12f constitute a part of the above-described fitting recess 11a, and shell side outer walls provided at both longitudinal end portions of the plug connector 20 when the plug connector 20 is fitted. It contacts with the part 22c and is made into a fitting state.

  At this time, the shell side wall portion 12f described above has a pair of support column portions 12f1 and 12f1 that rises continuously from the shell bottom portion 12d. The pair of support columns 12f1 and 12f1 are arranged so as to be separated from each other at an appropriate distance in the connector front-rear direction, that is, in a direction substantially orthogonal to the longitudinal direction of the conductive shell 22. Further, the upper end portions of both the column portions 12f1 and 12f1 are integrally connected by an upper edge portion 12f2 extending in the front-rear direction.

  Further, the hold-down (solder connecting portion) 12e described above is disposed between the two column portions 12f1 and 12f1 constituting the shell side wall portion 12f, and both column portions 12f1 of the shell side wall portion 12f are disposed. , 12f1 and the upper edge portion 12f2 are formed in a rectangular shape that is substantially the same as the planar shape of the hold-down 12e. That is, in a state where the material before the shell side wall portion 12f and the hold down 12e are bent is unfolded, the hold down 12e is contained in the space shape of the shell side wall portion 12f. Therefore, when the conductive shell 12 is molded, for example, it is possible to mold the hold down 12e from a portion inside the region where the shell side wall portion 12f is formed. In that case, the shell side wall portion 12f and the hold down 12e are molded from the same region of the same material.

  Further, as described above, the shell side wall portion 12f of the conductive shell 12 forms a part of the fitting recess 11a, and the shell side outer wall portion on the plug connector 20 side when the plug connector 20 is fitted. Although it is made into a fitting state by contacting with 22c, the lock part for holding those contact and fitting states is provided in shell side wall part 12f and shell side wall outer wall part 22c.

  Specifically, the lock portion described above includes a lock protrusion portion 12g provided on the rear column portion 12f1 constituting the shell side wall portion 12f of the receptacle connector 10, and a shell side surface outer wall portion 22c of the plug connector 20. It is comprised from the lock hole part 22g formed so that a part might be penetrated. When the plug connector 20 is inserted into the receptacle connector 10, the lock hole portion 22 g on the plug connector 20 side is engaged so as to enter the lock projection portion 12 g on the receptacle connector 10 side. The engagement state of the plug connector 20 with respect to the receptacle connector 10 is maintained by the engagement relationship.

  As described above, in the present embodiment, the plug connector 20 is engaged with the plug connector 20 as the mating connector on one of the pair of column portions 12f1 and 12f1 constituting the shell side wall portion 12f of the conductive shell 12. A lock projection 12g that constitutes the lock portion to be locked is provided. Therefore, the lock projection 12g is disposed in the vicinity of the hold down 12e fixed to the printed wiring board P as described above, so that the fixing strength against the load on the lock is improved. It has become.

  The lock protrusion 12g constituting the lock portion may be provided on the other side of the pair of column portions 12f1 and 12f1 or both. Moreover, it is also possible to make the protrusion part and hole part which comprise a lock | rock part have a reverse arrangement | positioning relationship.

  As shown in FIG. 13, a shell spring 12j for ground contact is provided so as to be adjacent to the rear side portion of the shell side wall portion 12f, that is, the lock projection portion 12g. The shell spring 12j is configured such that a part of the conductive shell 12 is cantilevered and raised toward the fitting recess 11a, and when the plug connector 20 is fitted from above as described above. The shell side surface outer wall portion 22c of the conductive shell 22 of the plug connector 20 is in elastic contact with the shell spring 12j of the receptacle connector 10, thereby making a ground connection.

  On the other hand, as described above, the shell front end inner wall portion 12 a provided at the front end edge portion of the conductive shell 12 of the receptacle connector 10 constitutes a part of the fitting recess 11 a with respect to the plug connector 20. The shell is brought into a fitted state in contact with a shell front end outer wall portion 22b provided at the front edge of the conductive shell 22, and a lock portion for holding the contact / fitted state is provided at the shell front end. The inner wall portion 12a and the shell front end outer wall portion 22b are provided. The lock portions provided on the shell front end inner wall portion 12a and the shell front end outer wall portion 22b include a lock projection portion 12h provided so as to protrude from the shell front end inner wall portion 12a of the receptacle connector 10, and a shell front end outer wall of the plug connector 20. The lock hole portion 22h is formed so as to penetrate a part of the portion 22b. When the plug connector 20 is inserted into the receptacle connector 10 as described above, the lock projections 12h on the receptacle connector 10 are engaged with the lock holes 22h on the plug connector 20 side, and these are engaged. The engagement state of the plug connector 20 with respect to the receptacle connector 10 is maintained by the engagement relationship of the lock portion.

  Further, the shell front end outer wall portion 12b provided at the front side portion of the shell front end inner wall portion 12a of the receptacle connector 10 is provided so as to extend over almost the entire width in the longitudinal direction. Hold downs (solder connection portions) 12e connected to the printed wiring board P are provided at the lower edge portions of both end portions in the longitudinal direction of 12b so as to protrude forward. Each of the hold downs 12e is formed of a plate-like member having a substantially rectangular plane shape, and the hold downs 12e are soldered in a state of being placed on the lands of the conductive paths formed on the printed wiring board P. As a result, a ground circuit is formed.

  As described above, in this embodiment, the shell front end inner wall portion 12a of the conductive shell 12, that is, the vicinity of the hold down 12e fixed to the printed wiring board P, is engaged with the plug connector 20 as the mating connector and Since the lock protrusion 12h that constitutes the lock portion that locks the plug connector 20 is provided, the fixing strength against the load on the lock portion is improved.

  In addition, it is also possible to set it as the structure which provides the lock protrusion part or lock hole part which comprises the same lock part in the rear-end edge part of the conductive shell 12 of the receptacle connector 10, and the protrusion part which comprises a lock part It is also possible for the holes and the holes to have a reverse arrangement relationship.

  Further, the shell front end inner wall portion 12a of the conductive shell 12 described above is provided with a shell spring 12i for ground contact adjacent to the lock projection portion 12h. The shell spring 12i is configured such that a part of the conductive shell 12 is cut and raised in a cantilevered manner toward the fitting recess 11a, and as described above, when the plug connector 20 is fitted from above. The shell front end outer wall portion 22b of the conductive shell 22 of the plug connector 20 is in elastic contact with the shell spring 12i of the receptacle connector 10, thereby making a ground connection.

  As described above, in this embodiment, the shell front end inner wall portion 12a of the conductive shell 12, that is, the vicinity of the hold down 12e fixed to the printed wiring board P, is engaged with the plug connector 20 as the mating connector and Since the shell spring 12i electrically connected to the plug connector 20 is provided, the path length of the current is shortened.

  As described above, according to the present embodiment, the pair of column portions 12f1 and 12f1 provided on the shell side wall portion 12f constituting the fitting recess 11a of the receptacle connector 10 are fixed to the printed wiring board P side. From the shell side wall portion 12f as a point of action to which a load is applied when the plug connector 20 is engaged / disengaged, the fulcrum is supported from the both sides of the hold down (solder connection portion) 12e. The distance to the hold-down 12e is set to be extremely short, and particularly when the plug connector 20 as the mating connector is removed, the moment force on the hold-down 12e can be suppressed to a very small level. Strength of the connector is improved.

  Further, in the stage of material removal before bending each part of the conductive shell 12, it is possible to take the material of the hold down 12e on a part of the shell side wall part 12f including the pair of column parts 12f1, 12f1, Material waste is prevented.

  Furthermore, in the present embodiment, lock protrusions 12g and 12h as lock portions for the plug connector 20 are arranged at a position close to a hold-down (solder connection portion) 12e fixed to the printed wiring board P side. Therefore, even when a large load is applied to the lock portion particularly when the plug connector 20 is removed, the moment force to the hold-down 12e having the lock portion as an action point is reduced. The proof stress of the electrical connector in 20 fitting operations is improved.

  Furthermore, according to the present embodiment, the ground contact shell spring 12i is disposed at a position close to the hold-down (solder connection) 12e that is bonded and fixed to the printed wiring board P side. The electrical resistance from the shell spring 12i to the holddown 12e is reduced, and the ground performance is improved.

  Furthermore, the plug connector 20 according to the present embodiment has a shell ceiling portion 22a, a shell front end outer wall portion 22b and shell side wall outer wall portions 22c provided on three sides, and a shell bottom wall portion 22d. The strength of the plug connector 20 is improved by the bent structure, and the insulating housing 21 is slid using the shell front end outer wall part 22b, the two shell side wall parts 22c, and the shell bottom wall part 22d. It can be easily assembled.

  In addition, since the shell bottom wall portion is partially eliminated, the height of the connector can be reduced correspondingly, and when the connectors 10 and 20 are fitted, they are connected to the plug connector 20. Since all the upper, lower, left and right surfaces of the thin coaxial cable SC are surrounded by the conductive shells 12 and 22 of both the connectors 10 and 20, a good shielding effect can be obtained.

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

  For example, although the embodiment described above applies the present invention to a vertical fitting type electrical connector, it can be similarly applied to a horizontal fitting type electrical connector.

  Further, the present invention is not limited to the connector for the fine coaxial cable as in each of the above-described embodiments, and an electric connector of a type in which a plurality of fine coaxial cables and insulating cables are mixed, a flexible wiring board, and the like are connected. The same can be applied to an electrical connector or the like.

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

P Printed wiring board SC Fine coaxial cable (signal transmission medium)
GB Ground bar 10 Receptacle connector 11 Insulating housing 11a Fitting recess 11b Bottom portion 12 Conductive shell 12a Shell front end inner wall portion 12a1 Shell front end inner wall portion longitudinal end portions 12b Shell front end outer wall portion 12c Shell spring 12d Shell bottom portion 12e Hold down (solder) Connection part)
12f Shell side wall portion 12f1 Post portion 12f2 Upper edge portion 12g Lock protrusion (lock portion)
12h Lock protrusion (lock part)
12i Shell spring 12j Shell spring 13 Conductive terminal (contact)
13a Solder connection piece 13b Contact point 20 Plug connector (mating side connector)
21 Insulating housing 21a Fitting convex part 21b Locking hole 22 Conductive shell 22a Shell ceiling part 22b Shell front end outer wall part (standing wall part)
22b1 Both ends in the longitudinal direction of the outer wall portion of the front end of the shell 22c Outer wall portion of the shell side surface (standing wall portion)
22d Shell bottom wall (bottom wall)
22e Locking piece 22h Lock hole (lock part)
23 Conductive terminal (contact)
22g Lock hole (lock part)

Claims (4)

The bottom part of the insulating housing having the fitting part to which the mating connector is fitted is mounted on the printed wiring board and used.
A conductive shell mounted on the insulating housing rises from the shell bottom at a longitudinal end portion of the conductive shell and covers at least a part of the bottom of the insulating housing, and a part of the fitting portion In an electrical connector comprising: a shell side wall portion that comprises: a solder connection portion that extends from an edge portion of the shell bottom portion toward the printed wiring board side and is connected;
The shell side wall portion has a pair of struts that stand up so as to bend continuously from the bottom of the shell,
The pair of struts are spaced apart in a direction substantially orthogonal to the longitudinal direction of the conductive shell,
The electrical connector, wherein the solder connection portion is disposed between the pair of support columns.   The electrical connector according to claim 1, wherein a lock portion that engages with the mating connector and locks the mating connector is provided on at least one of the pair of support columns. The conductive shell is provided with a shell spring for a ground contact that cuts and raises a part of the conductive shell so as to contact the mating connector,
The electrical connector according to claim 1, wherein the shell spring is disposed adjacent to the solder connection portion in a longitudinal direction of the conductive shell or in a direction orthogonal thereto.   The mating connector includes a ceiling portion having a substantially rectangular plane, a standing wall portion formed so as to bend continuously at three sides of an outer peripheral edge portion of the ceiling portion, and the standing wall portion is substantially the same as the ceiling portion. The electrical connector according to claim 1, further comprising: a bottom wall portion that is continuously bent so as to be parallel to each other.

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