CN1972025B - Electric connector - Google Patents

Abstract

The invention discloses an electrical connector, which includes an insulating body, a plurality of terminals held in the insulating body, and a metal shell at least partially protecting the terminals. It includes a pair of side walls parallel to each other and extending along the longitudinal direction of the insulating body, a first end wall connecting one end of the two side walls and a second end wall connecting the other end of the two side walls, wherein the first end wall and the second end The angle formed by the outer wall surface of the wall and the two side walls is different, so that the electrical connector can not only prevent mis-insertion with the butt connector, but also prevent mis-insertion with existing similar connectors.

Description

electrical connector

【Technical field】

The present invention relates to an electrical connector, in particular to an electrical connector that can be used to electrically connect two or more electronic devices.

【Background technique】

An electrical connector for electrically connecting two or more electronic devices generally includes a plug connector and a socket connector that cooperate with each other, and are installed on corresponding electronic devices respectively. For example, in a personal computer electronic system, in addition to the host computer, there are various peripheral devices, such as hard disk drives, scanners, burners, card readers, etc. As people's requirements for the miniaturization and weight reduction of personal computers are getting higher and higher, it is impossible to accommodate all external devices in the limited space of personal computers. Therefore, manufacturers integrate some external devices on an electronic device, and the A plug connector with a rectangular mating interface is installed on the device as the total signal output port. The mainframe of the personal computer is equipped with a socket connector with a rectangular mating interface that can cooperate with the above-mentioned plug connector, and the signal transmission between the host computer and the peripheral equipment is realized through the docking and cooperation of the socket connector and the plug connector. Since this kind of socket connector and plug connector are directly installed on the personal computer and the electronic device to be connected, the docking position between the two is roughly fixed, so even if the mutual mating between the rectangular docking ports does not provide the function of preventing misplugging , generally there will be no wrong insertion.

In some application occasions, the signal transmission between the personal computer and the above-mentioned electronic devices integrated with various peripheral equipments can also be realized through the combination of socket connectors and cable connectors. The socket connector is usually installed on a personal computer, and the cable connector assembly includes a plug connector mated to the socket connector on the personal computer and a cable directly connected to the electronic device. This kind of cable connector combination can adjust the length of the cable according to the distance between the personal computer and the electronic device, but the plug connector of the cable connector combination has greater randomness in the process of docking with the socket connector, which is easy It leads to reverse insertion, so it is necessary to provide an anti-mis-insertion function for the interface to ensure the reliability of the docking. US Patent No. 5,199,897 issued on April 6, 1993 discloses a pair of cable connector assembly and receptacle connector with an anti-mis-mating structure. The cable connector assembly has a plug connector, a cable, and a circuit board connecting the plug connector and the cable. The insulating body of the plug connector includes a base extending in the longitudinal direction, a tongue extending forward from the base, and a A plurality of terminal grooves are arranged on both sides of the tongue plate, and a plurality of plug terminals are held in the terminal grooves and extended out of the base to be welded on the circuit board. The plug connector also has a metal shell, which includes a flat plate fixed on the base and a metal frame extending forward from the flat plate and having an isosceles trapezoidal longitudinal section. The tongue plate extends into the receiving cavity surrounded by the metal frame. Inside. The insulating body of the receptacle connector includes a base and a docking portion extending forward from the base. The longitudinal section of the docking portion is an isosceles trapezoidal shape and is just accommodated in the plug connector receiving cavity. There are a number of socket terminals in electrical contact with the plug terminals fixed on both sides of the storage tank. When the cable connector assembly is reversely inserted into the receptacle connector unexpectedly, the short side wall of the plug connector receiving cavity will block the long side wall of the receptacle connector so that the cable connector assembly cannot be mated with the plug connector.

Since the longitudinal section of the mating portion of the plug and the socket is isosceles trapezoidal, it has the function of preventing the plug connector from being inserted into the socket connector in reverse, and thus is widely used in cable connection electronic devices. However, with the continuous development of electrical connectors, many electrical connectors will derive a series of electrical connectors with different terminal pitches and different numbers of terminals, and these electrical connectors may have the same mating interface. At this time, although the plug connector of the isosceles trapezoidal mating interface can prevent reverse mis-insertion with its mating socket connector, the same series of plug connectors with the same size mating interface can be inserted into the above-mentioned socket connector in a forward direction, thereby Causes mismating and damages the terminals.

Therefore, it is indeed necessary to design an electrical connector that can not only prevent misplugging with the mating connector, but also prevent misplugging with the existing rectangular mating interface or isosceles trapezoidal mating interface electrical connector in the industry.

【Content of invention】

The purpose of the present invention is to provide an electrical connector with good anti-mis-insertion function.

In order to achieve the above object, the present invention adopts the following technical solution: an electrical connector, which includes an insulating body, a number of terminals held in the insulating body, and a metal shell that at least partially protects the terminals. The mating portion where the connectors mate. The docking portion has a pair of side walls parallel to each other and extending along the longitudinal direction, a first end wall connecting one end of the two side walls and a second end wall connecting the other end of the two side walls, the first end wall and the second The angles formed by the outer wall surface of the end wall and the two side walls are different.

Compared with the prior art, the electrical connector of the present invention has the following beneficial effects: the electrical connector of the present invention has good error prevention by setting different angles between the outer wall surface and the side wall of the two ends of the butt joint. plug-in function.

【Description of drawings】

Fig. 1 is a front view and top perspective combined view of a socket connector according to the first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the socket connector shown in FIG. 1 .

Fig. 3 is a front view and bottom perspective combined view of the socket connector shown in Fig. 1 .

Fig. 4 is a front view and top perspective combination view of the plug connector according to the second embodiment of the present invention.

FIG. 5 is an exploded perspective view of the plug connector shown in FIG. 4 .

FIG. 6 is a rear view and top perspective combined view of the plug connector shown in FIG. 4 .

Fig. 7 is a comparative schematic diagram of the longitudinal section of the docking part of the socket connector and plug connector shown in Fig. 1 and Fig. 4 and the existing similar socket and plug connector.

【Detailed ways】

Please refer to Fig. 1 and Fig. 4, the receptacle connector 100 and the plug connector 200 are two specific implementation forms of the electrical connector of the present invention, and they can be docked with each other to connect two independent electronic devices, wherein the receptacle connector 100 is used To be installed on the motherboard (not shown) of the main electronic system such as a desktop computer, a notebook computer, etc., the cable connector assembly (not shown) connected with the socket connector 100 includes a plug connector 200, an electrical Cables connected to electronic devices integrated with peripheral devices such as recorders, scanners, etc., and circuit boards electrically connected to the plug connector 200 and the cables. The plug connector 200 is electrically connected to the electronic device integrated with the peripheral device through the cable, and the signal transmission between the main electronic system and the peripheral device is established through the mating of the socket connector 100 and the plug connector 200 .

1 to 3, the first embodiment of the present invention, that is, the receptacle connector 100 includes an insulating body 1 extending in the longitudinal direction, which includes a substantially rectangular parallelepiped base 10 and a base extending forward from the front surface of the base 10. Protrusion 11. A through hole 101 penetrating through the front and rear surfaces of the base 10 is respectively provided on the base 10 at the left and right sides of the protruding portion 11 . The upper surface of the base 10 is a flat surface, so that it is easy to be picked up by a vacuum suction device during the process of placing the receptacle connector 100 on a circuit board (not shown). The protruding portion 11 has a pair of first side walls 111 parallel to each other and extending along the longitudinal direction, a second side wall 113, a first end wall 112 connecting one end of the two side walls and perpendicular to the two side walls, and a connecting side wall. The second end wall 114 at the other end of the wall, wherein the outer wall surface of the second end wall 114 forms a certain angle with the two side walls 111, 113, so that the longitudinal section of the outer wall surface of the protrusion 11 is a right-angled trapezoid. The two side walls 111 , 113 surround the two end walls 112 , 114 to form a receiving groove 12 , and two sides of the receiving groove 12 are provided with a plurality of terminal slots extending through the base 10 .

The receptacle connector 100 includes a plurality of receptacle terminals 2 held in the terminal groove, including signal terminals 21 and power terminals 22 . Each receptacle terminal 2 includes contact portions 211, 221 electrically connected to the plug terminal 71 of the plug connector 200 (please refer to FIG. 6 ), holding portions 212, 222 and self-holding portions for holding in the terminal groove. Rearwardly extending solder tails 213,223. The welding tails 213 of the upper row of signal terminals 21 are welded to the circuit board by surface welding technology, while the welding tails 213 of the lower row of signal terminals 21 are bent into two rows and welded to the circuit board by the perforation welding technology of the power terminal tails 223 , This reduces the occurrence of short circuits.

In order to reduce the signal transmitted in the socket connector 100 from being affected by external electromagnetic interference, the socket connector 100 is also provided with a metal shell 3, which includes a flat plate portion 30 covering the upper surface of the base 10 of the insulating body 1 and surrounding protection. The metal frame 31 of the protruding part 11 . The flat plate portion 30 is provided with two riveting holes 32 corresponding to the through holes 101 on the insulating body 1 . The metal frame 31 is formed by drawing a metal plate. The metal frame 31 includes two side walls parallel to each other and two end walls connecting the two side walls, and the two side walls and the two end walls have uniform thickness. The shape of the outer wall of the metal frame 31 is the same as that of the protrusion 11 , that is, the longitudinal section of the metal frame 31 is also a right-angled trapezoid. The metal frame 31 and the protruding portion 11 jointly constitute a mating portion of the receptacle connector 100 .

Certainly, in other embodiments, the metal frame 31 may not be provided outside the above-mentioned protruding portion 11, or the metal frame may be changed into a metal sheet partially covering the protruding portion 11; or the protruding portion 11 may not be provided, but Only terminals and the like extend inside the metal frame 31 .

The receptacle connector 100 is also provided with a locking member for mounting the parts together, which includes a pair of plate fasteners 4 and a pair of rivets 5 . Each plate fixture 4 includes a main body 40 and a grab board part 42 bent perpendicularly from the side edge of the main body part 40, wherein the main body part 40 is provided with a perforation 41 slightly smaller than the through hole 101 of the insulating body 1, and the grip board part 42 ends These are two separate holding feet 420 that are finally inserted into the circuit board. Each rivet 5 includes a flat base 50 and a hollow cylinder 51 extending forward from the base. Internal threads are provided on the inner wall of the cylinder 51 .

During the assembly process, firstly, the metal shell 3 is put on the insulating body 1 from front to back, that is, along the mating direction of the receptacle connector 100 , and each riveting hole 32 is aligned with the corresponding through hole 101 respectively. The hollow cylinder 51 of each rivet 5 passes through the perforation 41 of the corresponding board member 4 , so that the board member 4 is set on the rivet 5 . Then the rivet 5 with the plate fastener 4 passes through the through hole 101 of the insulating body and the riveting hole 32 of the metal shell 3 from back to front, and finally the rivet 5 is riveted on the metal shell 3, so that the rivet 5 connects the insulating body 1 , the metal shell 3 and the plate fixture 4 are held together.

In order to make the receptacle connector 100 and the cable connector combined stably, the receptacle connector 100 is also provided with a pair of buckling parts 6, and each buckling part 6 includes a cylinder 62 provided with an external thread, which can be connected with Rivet 5 thread fit. After the socket connector 100 is installed on the desktop computer or notebook computer, the manufacturer of the desktop computer or notebook computer screws the buckle 6 into the rivet 5 to lock the socket connector 100 on the casing. The buckle 6 increases the stability of the mating of the two electrical connectors by buckling with the corresponding parts on the docking connector, so as to prevent the docking connector from being pulled out under abnormal conditions.

Please refer to FIG. 4, the second embodiment of the present invention, that is, the plug connector 200 includes an insulating body 7, a number of plug terminals 8 that are electrically matched with the socket terminals 2 and held on the insulating body 7, and are used to protect the terminals from electromagnetic waves. Interfering effects of the metal case 9 .

4 to 6, the insulating body 7 includes a substantially rectangular parallelepiped base 71, an elongated tongue plate 73 that fits forwardly from the front surface of the base 71 to the receiving groove 12 of the receptacle connector 100, and from the base. 71 "L"-shaped locking arms 74 extending backward from the rear surfaces of both ends in the longitudinal direction. The base 71 has a plurality of positioning grooves 712 recessed from its upper and lower surfaces and a pair of hooking grooves 711 symmetrically disposed on both sides of the positioning groove 712 . The upper and lower surfaces of the tongue plate 73 have a plurality of terminal grooves 731 penetrating through the base 71 . Each "L"-shaped locking arm 74 is provided with an engaging groove 740 extending outward from its inner surface and penetrating through its rear end surface.

The terminals 8 are respectively accommodated in the terminal grooves 731 on both sides of the tongue plate, which include a signal terminal 81 and a power terminal 82, and each terminal includes a contact portion 811, 821 electrically contacting with the socket terminal 2, and a self-contact portion 811. , 821 extend backward to the holding portions 812 , 822 held in the terminal channel 731 and the solder tails 813 , 823 extending backward from the holding portions 812 , 822 . When the circuit board (not shown) in the cable connector assembly is inserted into the fitting groove 740 of the "L"-shaped arm 74, the solder tails 813 and 823 of the two rows of terminals 2 are clamped and welded to the circuit board respectively. The upper and lower surfaces of the board are welded to the circuit board by surface welding technology.

The metal shell 9 includes a flat plate portion 91 covering the upper surface of the base portion 71 of the insulating body and a metal frame 92 having a receiving cavity 920 . The upper and lower sides of the flat plate part 90 are respectively torn to form a connecting piece 912 which can be used for grounding through the positioning groove 712 and covers part of the terminal tails 813, 823, and a fixed piece 911 which is symmetrically arranged on both sides of the connecting piece 912. The fixing pieces 911 are respectively fixed in the corresponding hooking grooves 711 so as to install the metal shell 9 on the insulating body 7 . The metal frame 92 has a uniform thickness and includes two side walls extending in the longitudinal direction, that is, first side walls 921, 922, a first end wall 924 connecting one end of the two side walls and perpendicular to the two side walls, and a connecting side wall. The other end of the second end wall 923 forms a certain angle with the first end wall 924 , the longitudinal sections of the inner and outer walls of the two side walls 921 , 922 and the two end walls 923 , 924 are right-angled trapezoids. The tongue plate 73 extends into the receiving cavity 920 of the metal frame 92 and together with the metal frame 92 forms a mating portion of the receptacle connector 100 . Two sidewalls 921 , 922 of the metal frame 92 are provided with a plurality of bumps (not labeled) that are recessed toward the receiving cavity 920 , which can increase the holding force of the plug connector 200 and the receptacle connector 100 when mated.

Of course, in other embodiments, an insulating frame integrally extending forward from the base 71 may also be provided around the tongue plate 73, and the metal frame covers the inner or outer wall of the insulating frame; or the metal frame may be replaced by an insulating frame; Or change the metal frame into a metal sheet or the like covering the inner wall or outer wall of the insulating frame.

Please refer to Fig. 7, the electrical connector of the present invention can be obtained in the following manner, the butt joint portion of the existing receptacle connector 100' includes two parallel side walls 111', 113' extending along the longitudinal direction, connecting the two side walls respectively The first and second end walls 112', 114' with the same length at both ends and the receiving groove 10' which is surrounded by the four wall parts and has the same size as the receiving groove 10 of the socket connector 100, and the outer wall surface of the four wall parts The longitudinal section is an existing isosceles trapezoid. The butt connector of the receptacle connector 100' is a plug connector 200', which has a tongue plate 73' of the same size as the plug connector 200 of the present invention and two parallel side walls 921', 922' connected end to end around the tongue plate 73' And the first end wall 924', the second end wall 923'. Rotate the first end wall 112' to a certain angle, so that the angle formed by the first end wall 112' and the two side walls 111', 113' is the same as that formed by the second end wall 114' and the two side walls 111', 113' The included angles are different. The so-called included angle between two planes refers to the acute angle or right angle formed by the intersection of the two planes. The socket connector thus obtained can be distinguished from the socket connector 100' not only in appearance, but also when it is mistakenly connected to a plug. When the connector 200' is docked, it will be blocked by the first end wall 923 of the plug connector 200', and the socket connectors obtained in this way belong to the present invention. If the first end wall 112 ′ is rotated counterclockwise with the midpoint P of the first end wall 112 ′ to a position perpendicular to the two side walls, the receptacle connector 100 according to the first embodiment of the present invention can be obtained. The 90-degree angle formed by the outer wall of the first end wall 112 and the two side walls 111 and 113 of the receptacle connector 100 is greater than the angle formed by the outer wall of the second end wall 114 and the two side walls 111 and 113 . In this way, the receptacle connector 100 can not only be distinguished from the receptacle connector 100' in appearance to achieve visual mis-insertion prevention, but even if the receptacle connector 100 is mistaken for the receptacle connector 100' by the operator and the existing When the plug connector 200' is plugged into the receptacle connector 100, the first end wall 112 of the receptacle connector 100 will block the first end wall 924' of the docking part of the plug connector 200', which can still achieve structural error prevention. insert. In addition, the plug connector 200 can only be inserted into the receptacle connector 100 in the forward direction. If it is inserted in the reverse direction, the second end wall 923 of the plug connector 200 blocks the second end wall 114 of the receptacle connector 100 and cannot be inserted. It can be seen from the above that the receptacle connector 100 can not only prevent mis-insertion with the mating plug connector 200, but also can be distinguished from existing connectors such as the receptacle connector 100', and the plug connector 200' will not be inserted into the receptacle connector. within 100.

The plug connector 200 of the second embodiment of the present invention can also be obtained by the above method. Take the midpoint Q of the first end wall 924 ′ of the plug connector 200 ′ and rotate the first end wall 924 ′ clockwise to a position perpendicular to the two side walls 921 ′, 922 ′ to obtain the plug connector 200 . The 90-degree angle formed between the inner and outer walls of the first end wall 924 and the two side walls 921 and 922 of the plug connector 200 is larger than the angle between the outer wall of the second end wall 923 and the two side walls. In this way, the plug connector 200 can not only be distinguished from the plug connector 200' in appearance, so as to prevent misinsertion visually, and even if the plug connector 200 is mistakenly regarded as the plug connector 200' by the operator and plugged into the socket When connecting the connector 100 ′, the first end wall 112 ′ of the receptacle connector 100 ′ will block the first end wall 924 of the mating portion of the plug connector 200 , and structural mis-insertion prevention can still be achieved. The plug connector 200 can not only prevent mis-insertion from the socket connector 100, but also can be distinguished from existing connectors such as the plug connector 200', and will not be inserted into the socket connector 100'.

Claims (8)

1. electric connector; It comprises insulating body and with the insulating body plurality of terminals of fixing mutually; Said electric connector has the docking section; The solder that said each terminal has the contact site that extends in the docking section, the holding parts that is immobilizated in insulating body and extends from holding parts, said plurality of terminals comprises signal terminal and power supply terminal, said docking section comprises a pair of longitudinally side wall that extends and the end walls that connects two side lengthwise end of being parallel to each other; It is plane that end walls all is; And the two ends of each end wall are directly connected in the lengthwise end of two side respectively, it is characterized in that: the outside wall surface of said end walls is different with the angle of sidewall angle, and said signal terminal goes to upper and lower two row's settings and comprises that row of signal terminals reaches row of signal terminals down; The solder that wherein goes up row of signal terminals is arranged as a row in order to surface soldered, and the solder of following row of signal terminals is bent into two rows in order to piercing welding.

2. electric connector as claimed in claim 1 is characterized in that: wherein the outside wall surface of an end wall is vertical with sidewall.

3. electric connector as claimed in claim 1 is characterized in that: said docking section comprises around the metal frame of the contact site of said plurality of terminals.

4. electric connector as claimed in claim 3 is characterized in that: said metal frame has two side and end walls, and the sidewall of this metal frame and end wall are the sidewall and the end wall of said docking section.

5. electric connector as claimed in claim 4 is characterized in that: the two side of said metal frame and the thickness of end walls are identical.

6. electric connector as claimed in claim 3 is characterized in that: said metal frame is taken out to draw by metallic plate and is formed.

7. electric connector as claimed in claim 1; It is characterized in that: said insulating body has base portion, and said docking section comprises projection that is extended by base portion and the metal frame that centers on projection, and said projection is provided with accepting groove; Be respectively equipped with the plurality of terminals conduit on the two sides of this accepting groove; Said plurality of terminals extends in the terminal conduit, and said base portion is respectively equipped with the locking part in the both sides of projection, and said locking part comprises the plate firmware; Said plate firmware comprise main part and autonomous body lateral margin bending grab board, this end of grabbing board forms the fixing pin.

8. electric connector as claimed in claim 7 is characterized in that: said metal frame is extended with the flat part that covers the insulating body base portion.

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