CN100392915C - Electrical junction box devices, plug connectors and socket connectors - Google Patents

Abstract

An electrical junction box device, and a plug connector and a socket connector used therein, are reduced in height and relatively narrow. The plug connector has two first contacts exposed on its side surface, which are arranged along a straight line and opposite to each other. The socket connector has a groove for accommodating the plug connector and two second contacts located in the groove, and the second contacts are at positions corresponding to the first contacts revealed everywhere. When the plug connector and the socket connector are mated with each other, the elastic contact element on the second contact contacts one side of the first contact so as to be electrically connected to the side of the plug connector. superior.

Description

Electrical junction box devices, plug connectors and socket connectors

technical field

The present invention relates to an electrical junction box device suitable for use in a small electric/electronic device such as a cellular phone, and a plug connector and a socket connector used in the electrical junction box device.

Background technique

It is known to electrically connect conductors to printed circuit boards (printed circuit boards) via electrical junction box arrangements. An example of such an electrical junction box device is disclosed in Japanese Unexamined Utility Model Publication No. 8(1996)-6368. This electrical junction box device is composed of a first connector (plug connector) connected to a wire and a second connector (socket connector) fixed on a printed circuit board.

Insulation-disbond contacts connected to the core of the wire are connected at the tip of the wire. In addition, a crimp contact (a crimp contact) is crimped on the shielding outer covering of the wire. The tip of the wire is accommodated in a first housing to form a plug connector. At the same time, the receptacle connector has a second housing for accommodating the plug connector, and two second contacts are arranged inside the second housing, and the two second contacts are respectively used Make contact with the insulation peeling contacts and crimp contacts on the plug connector.

Such junction box devices are configured to make connections to individual wires. Each second contact has a pair of legs for making contact with the insulation peel contact or crimp contact from two outer sides.

According to the aforementioned known junction box device, when the contacts on the plug-type connector and the socket-type connector are mated with each other, the connectors are arranged along a plane parallel to the circuit board. Therefore, the connector does not protrude from the circuit board and the height of the device is low. However, since the contacts on the receptacle connector have flexible arms located on either side of each contact on the plug connector, the following problems arise. That is to say, the support arm needs to have a predetermined range of motion in the width direction of the connector to ensure the necessary contact pressure, wherein the range of motion is parallel to the circuit board. Accordingly, the width of the connector becomes larger. When the number of terminals on a connector increases to two, the contacts will require more space horizontally. Therefore, there is a possibility that such a connector will be difficult to apply to small electric/electronic equipment in which an installation area is limited.

Contents of the invention

The present invention has been developed in view of the aforementioned problems. The object of the present invention is to provide a small-sized electric junction box device with a small height and narrowness, and a plug connector and a socket connector used in the electric junction box device.

The present invention proposes an electrical junction box device comprising:

A plug connector comprising a plug housing and a first contact for being connected to a wire, the configuration of the plug housing corresponding to that of the first contact; and

A socket connector, the socket connector is installed on a circuit board, the socket connector includes a socket housing and a second contact for contacting the first contact, the structure of the socket housing is the same as The structure of the second contact corresponds; where

the plug housing has mutually opposed side walls;

Each of the first contacts has a first base, an insulation peeling plate with grooves and a contact plate, the insulation peeling plate is used to contact and fix the wires to be connected to the plug connector, so that The wires are parallel to said circuit board and a contact plate is bent upwards from the first base, a contact surface of said contact plate emerging on one of said side walls of the plug connector;

The socket housing has a groove for matching with the plug-type connector, the groove is open at its top, and opens to a front wall of the socket housing, and the front wall faces the wire;

Each of the second contacts has an elastic contact portion and a circuit board connection portion, the elastic contact portion extends in an arc from one end of the second base of the second contact so that at the groove exposed for contact with the contact surface of the first contact when the plug connector is accommodated in the groove, the circuit board connecting portion is bent and The other end of the second base opposite to the one end of the second base is formed for being electrically connected to the circuit board;

The first contacts are arranged in pairs along a horizontal axis of symmetry parallel to the length direction of the plug housing of the plug connector and are opposite to each other; and

Corresponding to the first contacts, the second contacts are also arranged in pairs along the horizontal axis of symmetry parallel to the length direction of the socket housing and the plug housing of the socket connector, and are opposite to each other.

The electrical junction box device among the present invention comprises:

a plug connector having a first contact for being connected to a wire;

a receptacle connector mounted on a circuit board having a second contact for making contact with the first contact; wherein

The side surfaces of the plug connectors face each other;

The first contacts have contact surfaces which come into contact with the wires to be fixedly connected to the plug connector and hold these wires so that the wires are substantially parallel to the circuit board, said The contact surface is exposed on one side surface of the plug connector;

The receptacle connector has a groove for receiving the plug connector, the groove is open at its top and opens to the side facing the wire;

The second contact has a contact portion and a circuit board connection portion, the contact portion being exposed at the groove for contact with the first contact when the plug connector is accommodated in the groove contacting the contact surfaces, the circuit board connection portion is adapted to be electrically connected to the circuit board;

the first contacts are arranged in pairs along a straight line and are opposite to each other; and

Corresponding to the first contacts, the second contacts are also arranged in pairs along a straight line and are opposite to each other.

The plug connector in the present invention includes:

an insulating plug housing with side walls facing each other; and

Contacts each having a first base, grooved insulation release plates for making contact with and securing the wires in the plug connector, and bent upwardly from the first base The contact plate, the contact surface is exposed on the side wall; where

The structure of the plug housing corresponds to the structure of the contacts;

the plug connector is configured to mate with a groove provided in a socket housing; and

The contacts are arranged in pairs in the housing along a horizontal axis of symmetry parallel to the length direction of the plug housing and the plug housing, and are opposite to each other.

The socket connector in the present invention includes:

A receptacle housing having a recess for accommodating a plug connector formed therein, the recess being open at its top and opening to a the front wall of the wire on the device; and

contacts, each having a contact portion and a circuit board connection portion, the contact portion extending from one end of the base of the contact in an arcuate manner so as to emerge at the groove for connection to the plug When the type connector is accommodated in the groove, it makes contact with the contacts on the plug type connector, and the circuit board connection part is opposite to the one end of the base by bending in the direction opposite to the elastic contact part. The other end of the base is formed for being connected on a circuit board; where

the configuration of the socket housing corresponds to the configuration of the contacts; and

Corresponding to the contacts on the plug connector, the contacts are arranged in pairs along the horizontal axis of symmetry parallel to the length direction of the socket housing and the plug housing of the plug connector, and are opposite to each other .

A construction can be used where:

the receptacle connector has a cutout in a side wall opposite the open grooved side; and

The plug connector has a projection complementary to the slot, and the projection fits in the slot when fully mated with the socket connector.

Also, a construction can be used where:

Both the plug connector and the socket connector have locking parts that cooperate with each other during the mating process of the plug connector and the socket connector. Compared with the contact surface and the contact part, the locking part is made to extend further towards the side from which the wire is led out.

It is also possible to use a construction where:

Two parallel contact accommodating grooves are provided on the plug housing of the plug connector, and the two grooves are open towards the top thereof;

The first contact (the contact on the plug connector) is an insulation stripping contact;

the first contact is disposed in the contact receiving groove; and

A wire is connected to the first contact in an insulation stripping manner. Preferably, the plug connector is mated with the socket connector under the condition that the contact accommodating groove faces the socket connector. It is also preferred that a bend (arrow) for preventing the wire from pulling out is formed at the end of the contact accommodating groove toward the side from which the wire is led out.

The contact portion on the second contact may be configured as a plurality of elastic contact elements spaced apart along the axial direction (lengthwise direction) of the wire.

According to the electrical junction box device in the present invention, the plug connector includes side surfaces facing each other; and the first contact on the plug connector has a wire connecting portion for connecting and fixing the wire , and a contact surface exposed on one side surface of the plug connector. In contrast, a receptacle connector includes a recess for accommodating a plug connector, which recess is open at its top and opens to the side facing the wires. the second contact on the socket connector has a contact portion exposed at the groove for contacting the contact surface of the first contact when the plug connector is accommodated in said groove, and a circuit board connection portion for being electrically connected to the circuit board. The first contacts are arranged in pairs along a straight line and opposite to each other, and corresponding to the first contacts, the second contacts are also arranged in pairs along a straight line and opposite to each other. Therefore, the following effects are produced.

The contacts on the socket connector come into contact with one side of the contacts on the plug connector; thus, the space required for the contacts in the width direction is reduced. Therefore, since the height of the connector device is small and narrow, miniaturization of the connector device can be achieved.

In addition, the plug connector in the present invention includes: an insulating plug housing, the side surfaces of which are opposed to each other; A wire connection portion that makes contact and fixes the wires, and a contact surface exposed on the side surface; wherein the contacts are arranged in a straight line in the housing, facing each other. Therefore, the contact portions on the contacts are provided on the side surfaces of the plug connector so that their heights are reduced.

The receptacle connector in the present invention includes: a receptacle housing, which has a groove formed therein for accommodating a plug connector, the groove is open at its top, and opens to a side facing the wire connected to the plug connector; and contacts having contact portions exposed at the groove for receiving the plug connector in the groove When in contact with the contacts on the plug connector, and the circuit board connection part for being connected to the circuit board; wherein, corresponding to the contacts on the plug connector, the contacts Arranged in pairs along a straight line and facing each other. Therefore, when the plug connector and the socket connector are assembled together, the height of the connector device can be reduced.

Furthermore, in this case: the receptacle connector has a notch on the side wall opposite to the side open with said notch; and the plug connector has a slot complementary to said notch. The protrusion fits into the slot during full mating with the socket connector, the complete mating between the socket connector and the plug connector being visually confirmed. In other words, if the plug connector is installed upside down, the protrusion and the slot will engage during the initial mating process. The plug connector will be in such a state that it protrudes from said groove and cannot be pressed in any further. Therefore, incorrect fitting can be confirmed by visual inspection, thereby preventing wrong fitting.

Also, in this case, both the plug connector and the socket connector have locking parts that cooperate with each other during the mating process of the plug connector and the socket connector, and are in contact with the contact If the locking portion is made to extend further towards the side from which the wire is led out than the contact portion, the plug connector is more difficult to loosen when a prying force is exerted on the wire.

Description of drawings

Fig. 1 is a perspective view of the plug connector of the present invention.

FIG. 2A is a plan view of the plug connector shown in FIG. 1. FIG.

FIG. 2B is a side view of the plug connector shown in FIG. 1 .

Fig. 3 is a perspective view of the receptacle connector of the present invention.

FIG. 4 is a perspective view showing a state just before mating of the plug connector shown in FIG. 1 and the receptacle connector shown in FIG. 3 takes place.

Fig. 5 is a perspective view showing the electrical junction box device of the present invention, with mated plug connectors and socket connectors.

FIG. 6 is a sectional view along line VI-VI in FIG. 5 .

Detailed ways

Hereinafter, preferred embodiments of an electrical junction box device (hereinafter simply referred to as "device"), a plug connector, and a receptacle connector in the present invention will be described with reference to the accompanying drawings. Fig. 1 is a perspective view of the plug connector of the present invention. FIG. 2A is a plan view of the plug connector shown in FIG. 1. FIG. FIG. 2B is a side view of the plug connector shown in FIG. 1 .

First, a plug connector 10 will be described with reference to FIGS. 1 , 2A and 2B. The plug connector 10 is constituted by an insulating plug housing 2 (hereinafter simply referred to as "housing") and is formed substantially as a thin rectangular parallelepiped. The housing 2 is configured horizontally symmetrically. A groove 6 is formed on the side wall 4 , which groove 6 constitutes the outer side surface of the housing 2 in its middle along the length direction 3 of the housing 2 . A pair of contact accommodating grooves 8 (hereinafter simply referred to as “accommodating grooves”) are formed on the inner side of the groove 6 . The accommodating groove 8 extends along the length direction 3 of the housing 2 , that is, extends along the length direction of the wire W, and is open toward the upper surface 12 of the housing 2 . In each of the two accommodating grooves 8, an insulation stripping contact 11 (first contact) is provided.

The shape of the casing 2 will be described in further detail below. It should be noted that, since the structure of the casing 2 is horizontally symmetrical, only one side thereof will be described. In addition, for convenience, the surface of the plug connector 10 facing upward in FIG. The groove 6 extends from the upper surface 12 to the lower surface 14 of the housing 2 ( FIG. 2B ) and is made open towards the interior of the housing 2 to the side of the housing 2 . Towards the inside of the groove 6 , a narrow groove 16 is formed that is open at the upper surface 12 and extends along the length direction 3 . The groove 16 and the accommodating groove 8 communicate with each other via a channel 18 , and the channel 18 opens to the upper surface 12 . The channel 18 is formed approximately in the middle of the groove 6 along the length direction 3 .

The accommodation groove 8 is made longer and wider than the groove 16 . Its rear is closed by a side wall 20 which is part of the rear wall 44 and the receiving channel 8 is open towards the front wall 22 . A wide portion 24 is formed at approximately the middle of the accommodation groove 8 along the length direction 3 , the wide portion 24 is wider in the width direction of the wire W, and extends from the upper surface 12 of the housing 2 to the bottom wall 26 . In addition, a wire-setting groove 28 is formed in the front wall 22 corresponding to the receiving groove 8 . The wire placement groove 28 has elastically deformable bent portions 30 (arrows), which extend into the wire placement groove 28 from both sides of the upper surface 12 . A gap 31 through which the wire W passes is formed between the pair of bent portions 30 and 30 . An arc-shaped cone 30a for guiding the wire W is formed on the side of the bent portion 30 facing the upper surface 12 to facilitate the insertion of the wire W.

Next, the contact 11 housed in the housing groove 8 will be described. The contacts 11 are each formed by punching and bending a single sheet metal, one of which is shown in FIG. 1 separate from the housing 2 . Each contact 11 includes a substantially rectangular base 32; an insulation peeling plate 34 (wire connection portion) formed by bending both end portions of the base 32 along the length direction 3; 35 a contact plate 36 bent upwardly from the base 32 . The outer surface of the contact plate 36 is a contact surface 36a which is in electrical contact with a contact 132 (second contact) on a receptacle connector 100, which will be described later.

Pairs of insulation stripping plates 34 are spaced apart along the length direction 3 of the wire W, and each has a groove 38 opening upward. The two grooves 38 are aligned along the length direction 3 of the wire W, and are configured to be electrically connected with the wire W passing therethrough. Barbs, that is to say protrusions 40 , are formed on both sides of the lower end portion of the insulation peeling plate 34 .

The contact plate 36 is a vertical plate extending along the length direction 3 . An outwardly protruding flange 42 is formed in the middle of the contact plate 36 along the length direction 3 . The mode of operation of the flange 42 will be described later. Furthermore, protrusions 43 are formed at both edges of the contact plate 36 in the length direction 3 , the protrusions 43 having the same thickness as the contact plate 36 .

In order to install the contact 11 into the housing 2 , the contact 11 is pressed into the accommodating groove 8 from the side of the upper surface 12 . During insertion, base 32 and contact plate 36 are press fit within wide portion 24 and groove 16, respectively. At the same time, the connection part 3 is arranged in the channel 18 . The protrusions 40 and 43 are in frictional contact with the inner surfaces of the wide portion 24 and the groove 16 respectively to prevent the contacts from being pulled out of the housing 2 .

The contacts 11 are placed in the accommodating groove 8 on the housing 2 . Next, the wires W are placed on the respective contacts 11 and pressed into the grooves 38 on the insulation stripping plate 34 by methods known to those skilled in the art. The side wall 20 is used to position the tip 21 of the wire W during the wire W placement process. When the wire W is pressed into the groove 38 , the outer coating of the wire W is torn by the edge of the groove 38 , so that the core (not shown) of the wire W is electrically connected to the contact plate 36 . The ends of the wires W toward the sides where they are drawn out of the plug connector 10 are pressed into the wire insertion groove 28 through the gap 31 while deforming the bent portion 30 . The free end of the bent portion 30 is used to prevent the wire W that has been pressed into the wire insertion groove 28 from being pulled out from above.

The plug connector 10 has a tongue 46 (protrusion) at the middle part of the lower side of the rear wall 44 which is opposite to the end from which the wires are led out. The lower surface of the tongue piece 46 is coplanar with the lower surface 14 of the housing 2 . The mode of operation of the tongue 46 will be described later. Furthermore, toward the side from which the wire is led out, a latching projection 5 (locking portion) is provided on the side wall 4, the latching projection 5 having an upwardly facing cone 5a. Also, cones 4a and 44a are formed on the upper edges of the side wall 4 and the rear wall 44 respectively, and they serve as guides during mating with the receptacle connector 100 .

Next, the receptacle connector 100 mated with the plug connector 10 will be described with reference to FIG. 3 . Fig. 3 is a perspective view of the receptacle connector of the present invention. The receptacle connector 100 includes a thin parallelepiped insulating receptacle housing 102 (hereinafter simply referred to as "housing"). The housing 102 has a recess 104 at approximately its middle for receiving a plug connector. The groove 104 is opened to the upper surface 102 of the housing 102 and opens toward the front. The recess 104 is defined by a rear wall 108 , an inner wall 110 and a bottom wall 112 . Furthermore, a slot 114 is provided at the upper edge of the rear wall 108 , which slot is complementary to the tongue 46 on the plug connector 10 .

Since the housing 102 is horizontally symmetrical, only one side of the housing 102 will be described. A groove 120 is formed in the side wall 116 of the housing 102 and extends from the upper surface 106 to the lower surface 118 . Towards the inside of the groove 120 , a groove 124 extending along the length direction 3 is formed. Two ribs 126 , 126 are provided which extend from the respective inner wall 110 towards the interior of the groove 104 . The ribs 126 , 126 are arranged at intervals along the length of the plug connector 10 along the length direction 3 . A rib 128 is integrally molded with the housing 102 at an intermediate position between the ribs 126 , parallel to the ribs 126 . The ribs 126 and 128 are joined by a contact support wall 130 adjacent to the groove 120 . A contact 132 is mounted on the contact support wall 130 . A rectangular opening 134 is provided on the bottom wall 112 between the ribs 126 and 128 , the rectangular opening 134 passing through the lower surface 118 .

Next, the contacts 132 installed in the housing 102 will be described. The contacts 132 are each formed by punching and bending a single sheet metal, one of which is shown in FIG. 3 separate from the housing 102 . Each contact 132 includes: a plate-like base 132 having a cutout 136 at its upper edge; and a contact portion, that is, an elastic contact member 140 (hereinafter simply referred to as “contact member”) , which extend upwardly from two locations inside the slot 136 , curve downwardly in an arcuate manner, and then curve upwardly again in an arcuate manner near the lower edge of the base 138 .

The two contact elements 140 are made spaced apart so that they can be arranged between the ribs 126 and 128 . At the tip of the contact element 140 , an extension 140 a is formed, which will extend into the interior of the groove 104 to the greatest extent when the contact 132 is placed in the groove 104 . The extended portion 140a functions as a locking portion when the contacts 11 and 132 are mated with each other, but details thereof will be described later. The tip of the contact element 140 is obliquely curved towards the base 138 above the extension 140a to form a guide surface. The contact member 140 configured in this way has elasticity as a whole and can be deformed in the thickness direction of the contact member 140 .

In addition, two protrusions 139 are provided on respective side edges of the base 138, the two protrusions 139 being spaced apart in the vertical direction. Along the direction opposite to the contact element 140, by bending the end of the base 138 opposite the slot 136, a circuit board connection portion 141 is formed, which is to be surface mounted to a circuit board (not shown). shown) on.

Next, a method of mounting the contacts 132 to the housing 102 will be described. If the base 138 of the contact 132 is pressed into the groove 124 in the recess 120 from above, the contact element will be able to cover the contact support wall 130 . At the same time, the lower part of the contact element 140 is disposed within the opening 134 . Since the bottom wall 112 does not interfere with the contact element 140, the contact element 140 can flex sufficiently. The contact element 140 is interposed between the ribs 126 and 128 in a state in which the contact element is thus protected. The shape of the two contact elements 140 is properly maintained due to the presence of the intermediate rib 128, which prevents excessive deformation due to misfitting or pulling forces applied from an external force source. Furthermore, the contact support wall 130 prevents solder from entering the groove 104 towards the contact element 140 when the circuit board connection portion 141 is soldered to a circuit board (not shown).

When the contacts 132 are press fit into the grooves 124, the protrusions 139 frictionally engage with the grooves 124, thereby securing the base 138 therein. On the inner wall 110 adjacent to the front wall 142 , a pair of locking protrusions 146 are formed in the groove 104 of the housing 102 , and the pair of locking protrusions 146 have a shoulder 144 facing downward. The working method of the locking protrusion 146 will be described later. A cone 148 is formed on the inner side of the upper edge of the rear wall 108 and the inner wall 110, wherein the cone 148 is used as a guide during mating with the plug connector 10, the rear wall 108 and the inner wall 110 define a groove 104 .

Next, the mating of the plug connector 10 and the receptacle connector 100 will be described with reference to FIGS. 4 to 6 . FIG. 4 is a perspective view showing a state just before mating of the plug connector 10 and the receptacle connector 100 takes place. Fig. 5 is a perspective view showing the electrical junction box device of the present invention, with connectors 10 and 100 mated with each other. FIG. 6 is a sectional view along line VI-VI in FIG. 5 .

First, referring to FIG. 4 , the plug connector 10 is in a position corresponding to the groove 104 on the receptacle connector 100 , while the bent portion 30 faces toward the receptacle connector 100 . If the plug connector 10 is pressed down into the groove 104 from this state, the side wall 4 of the plug connector 10 will move along the inner wall 110 of the groove 104, thereby making the plug connection The device 10 is accommodated in the groove 104. The locking protrusion 5 on the plug connector 10 is engaged with the locking protrusion 146 (locking portion) on the groove 104, and thereby the connectors are fixed to each other. The mating of the locking protrusions 5 and 146 can prevent the plug connector 10 from being released from the receptacle connector 100 even if a pulling force is applied to the wire W at the end from which the wire W is led out.

Next, as shown in FIG. 5 , when the plug connector 10 and the receptacle connector 100 are fully fitted together, the tongue 46 on the plug connector 10 will enter the cutout on the receptacle connector 100 . groove 114, and the lower surface 14 of the plug connector 10 and the upper surface 106 of the receptacle connector 100 will become coplanar. Thus, full mating of the connectors can be confirmed by visual inspection.

In the event that the plug connector is pressed into the socket connector 100 upside down, the tongue 46 will abut the notch 114 during the initial stages of the mating operation, and the plug connector 10 will not be able to be pressed any further. into the receptacle connector 100. At the same time, the plug connector 10 is in such a state that it protrudes from the receptacle connector 100, thereby facilitating visual confirmation of a wrong fit. In addition, the tongue 46 serves as a lever, which can be grasped by a finger or similar tool, so that when the plug connector 10 needs to be removed from the socket connector 100, the wire W is also pulled upwards. while pulling the plug connector 10 upwards.

Next, the mating state between the contacts 11 and 132 during the complete mating of the connectors 10 and 100 will be described with reference to FIG. 6 . As the plug connector 10 and the receptacle connector 100 are mated with each other, the flange 42 on the contact 11 passes through the extended portion 140a of the contact 132 and engages with the extended portion 140a. Thereby, the contacts 11 and 132 are electrically connected to each other, and at the same time, the pull-out phenomenon in the direction in which they are separated from each other is prevented. That is, the extended portion 140 a and the flange 42 also function as locking portions for the connectors 10 and 100 .

The electrical contact parts on the contacts 11 and 132 are located inside the device 1, preventing access to these electrical contact parts from the outside. Apart from the fact that two contact elements 140 are arranged on each contact 11 , this increases the reliability of the electrical connection. In addition, since the flange 42 and extension 140a protrude toward each other, a "click" is perceived when they cross each other. A complete mating between the connectors 10 and 100 can also be identified by this "click".

If the wire W drawn out from the plug connector 10 is pulled upward from the position shown in FIG. Therefore, separation of the plug connector 10 from the receptacle connector 100 is prevented. The locking function is particularly effective because the locking projections 5 and 146 are positioned closer to the ends of the wires leading out of the plug connector 10 than the contact portions on the contacts 11 and 132 .

In addition, when the wire W is pulled upward, the wire W is prevented from moving upward by the bottom wall 26 of the housing 2 of the plug connector 10 without causing any damage to the housing 2 . When the wire W is pulled down, although the force is applied to the bent portion 30, the force will be received by the bottom wall 112 of the housing 102 of the receptacle connector 100, and the bent portion 30 will not be subjected to any force. damage.

A preferred embodiment has been described in detail above, but the present invention is not limited to the foregoing embodiment. Various changes and modifications may be made without departing from the scope of the invention as hereinafter stated. For example, the contacts of the plug connector 10 may be crimp contacts.

Claims (6)

1. An electrical junction box device comprising:

a plug connector comprising a plug housing and a first contact for being connected to a wire, the plug housing having a configuration corresponding to the configuration of the first contact; and

a receptacle connector mounted on a circuit board, the receptacle connector including a receptacle housing and a second contact for making contact with the first contact, the receptacle housing having a configuration corresponding to the configuration of the second contact;

wherein

The plug housing having opposed sidewalls;

each of said first contacts having a first base portion, a dielectric stripping plate with a recess for contacting and securing wires to be connected to the plug connector so that the wires are parallel to said circuit board, and a contact plate bent upwardly from the first base portion, a contact surface of said contact plate emerging on one of said side walls of the plug connector;

said receptacle housing having a recess for mating with a plug connector, the recess opening to a top thereof and opening to a front wall of the receptacle housing, said front wall facing said wires;

each of the second contacts has an elastic contact portion extending in an arc-shaped manner from one end of a second base of the second contact so as to be exposed at the recess for coming into contact with the contact surface of the first contact when the plug connector is received in the recess, and a circuit board connection portion formed by bending the other end of the second base opposite to the one end of the second base in a direction opposite to the elastic contact portion for being electrically connected to the circuit board;

the first contacts are arranged in pairs along a horizontal symmetry axis of the plug housing of the plug connector parallel to the length direction of the plug housing and are opposite to each other; and

the second contacts are also arranged in pairs, corresponding to the first contacts, along the receptacle housing of the receptacle connector and a horizontal axis of symmetry parallel to the length direction of the plug housing, and are opposite one another.

2. An electrical junction box device as claimed in claim 1, wherein:

said receptacle connector having a slot in a rear wall opposite said front wall; and is

The plug connector has a projection complementary to the slot, the projection fitting into the slot when fully mated with the receptacle connector.

3. An electrical junction box device as claimed in claim 1, wherein:

the plug connector and the receptacle connector each have a locking portion which are brought into engagement with each other during engagement of the plug connector with the receptacle connector, the locking portion of the plug connector being provided on a side wall of the plug housing each close to a front wall of the receptacle housing for the lead wires to be led out, the locking portion of the receptacle connector being formed on an inner wall of the recess of the receptacle housing close to the front wall of the receptacle housing.

4. An electrical junction box device as claimed in claim 2, wherein:

the plug connector and the receptacle connector each have a locking portion which are brought into engagement with each other during engagement of the plug connector with the receptacle connector, the locking portion of the plug connector being provided on a side wall of the plug housing each close to a front wall of the plug housing for the lead-out, the locking portion of the receptacle connector being formed on an inner wall of the recess of the receptacle housing close to the front wall of the receptacle housing.

5. A plug connector comprising:

an insulating plug housing having opposed sidewalls; and

contacts each having a first base, a notched insulation displacement plate for contacting and securing a conductor within the plug housing, and a contact plate bent upwardly from the first base, a contact surface of the contact plate being exposed at the side wall; wherein

The structure of the plug shell corresponds to the structure of the contact;

the plug connector is configured to mate with a recess provided in a receptacle housing; and

the contacts are arranged in pairs along a horizontal axis of symmetry of the plug housing parallel to the length direction of the plug housing and are opposite one another.

6. A receptacle connector, comprising:

a receptacle housing having a recess for mating with a plug connector formed therein, the recess opening to a top thereof and opening to a front wall of the receptacle housing, the side facing wires connected to the plug connector; and

contacts each having an elastic contact portion extending in an arc-shaped manner from one end of a base of the contact so as to be exposed at the recess for coming into contact with a contact on a plug connector when the plug connector is received in the recess, and a circuit board connection portion formed by bending the other end of the base opposite to the one end of the base in a direction opposite to the elastic contact portion for being connected on a circuit board;

wherein,

the structure of the socket shell corresponds to that of the contact; and

in correspondence with the contacts on the plug connector, the contacts are arranged in pairs along a horizontal symmetry axis of the socket housing parallel to the length direction of the plug housing of the plug connector and opposite to each other.

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