JP4077721B2 - Electrical connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a kind of electrical connector, and more particularly to a receptacle connector used for high-speed data transmission and meeting IEEE 1394b transmission standards.
[0002]
[Prior art]
The IEEE 1394 connector in the art is an electrical connector that conforms to the high-speed parallel universal standard established by the Institute of Electrical and Electronics Engineers (IEEE), and is an interface for mass storage devices such as hard disks and compact disks. It is applied to computer peripherals such as printers and scanners, and consumer electronic products such as digital televisions, set top boxes, and video cameras. Since then, connectors that meet both IEEE 1394-1995 and IEEE 1394a standards have been developed one after another, and their transmission speeds and functions have been improved accordingly. Recently, the high-speed, long-distance IEEE 1394b standard has been established, which is a significant improvement over the 1394 basic standard, and is completely complete with the conventional IEEE 1394-1995 and IEEE 1394a standards. Doubles as For this reason, the transmission speed is increased to 800 Mbps, and it is useful for long-distance transmission using UTP-5 (Unshielded TwistPaired), plastic fiber and glass fiber, etc., whose length is 100 meters and the data transmission speed is kept at least 100 Mbps. ing. Because of this obvious advantage in high speed and long distance transmission, IEEE 1394 governs the trend of PC products, communication systems and home network consistency interfaces. The shield function is particularly necessary for the high-speed data transmission electrical connector conforming to the IEEE 1394b standard. For this reason, the electrical connector is generally used to prevent electromagnetic interference by providing shielding housings on both the inner layer and the outer layer. The shielding housing is grounded, thereby improving the shielding function and obtaining the effect of releasing static electricity. Since the outer shielding housing (outer layer shielding housing) is easily provided with a grounding member, the grounding circuit of the circuit board can be connected by extending the grounding piece integrally from the bottom of the outer shielding housing. The inner shielding housing (inner shielding housing) is installed at the center of the electrical connector, and a part of the inner shielding housing is fitted into the insulating body, so that it is difficult to provide a grounding member, and the inner shielding housing has a grounding function. Becomes difficult. In this way, since the grounding piece extending integrally from the inner shielding housing is provided and the inner shielding housing does not have a portion exposed directly from the outside of the connector, the inner shielding housing is stamped and molded due to the presence of the grounding piece. In addition, it has to be improved in terms of the difficulty of bending, and the connecting portion between the grounding piece and the inner shielding housing is easily broken and cut.
[0003]
Therefore, how to easily and effectively install the grounding member, connect the inner shielding housing of the electrical connector, and ground the inner shielding housing has become a technical challenge for those skilled in the art. It was.
[0004]
[Problems to be solved by the invention]
An object of the present invention is to provide an electrical connector having a kind of excellent grounding effect and electromagnetic shielding function.
[0005]
Furthermore, an object of the present invention is to provide an electrical connector having an inner shielding housing which is manufactured independently, is easily replaced, and is provided with a grounding member capable of stably connecting a circuit board.
[0006]
[Means for Solving the Problems]
An electrical connector according to the present invention is installed on a circuit board and contacts a mating electrical connector. The electrical connector includes an insulating body, a plurality of conductive terminals, an inner shielding housing, an outer shielding housing, a grounding member, and the like. The insulating body has a root portion provided at the rear end of the electrical connector, and a pair of abutting plates parallel to the root portion are formed to extend forward, and a plurality of terminals are accommodated on the corresponding contact plate. A hole is provided, and the terminal receiving hole extends rearward and penetrates the root portion. The plurality of conductive terminals are accommodated corresponding to the terminal accommodation holes, and each conductive terminal has an abutting portion that abuts against a mating electrical connector, and a fixing portion that extends backward from the abutting portion; A connecting portion connected to the fixing portion and extending from the insulating main body and connected to the electric circuit of the circuit board. The inner shielding housing is covered on the outer periphery of the abutting plate of the insulating main body, the rear end of the side wall has a rectangular cutout, and the first accommodation is between the abutting plate and both side walls of the inner shielding housing. Define the space. The outer shielding housing is coated on the outer periphery of the root portion of the insulating main body and extends forward to form a frame shape. A second housing space is formed between the inner shielding housing and the outer shielding housing, and the first housing space and the second housing space are used for incorporating a contact portion of the contact connector. The grounding member is assembled to an insulating main body adjacent to the inner shielding housing, and a head portion located at a rectangular cutout at a rear end of the inner shielding housing, a pressure contacting portion pressed against the inner shielding housing, and an insulating main body. It includes at least a main body portion to be engaged and a joint portion extending from the insulating main body, and the joint portion is connected corresponding to the ground circuit of the circuit board, thereby realizing grounding.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
As shown in FIGS. 1 to 4, the electrical connector according to the present invention is a receptacle connector that is used for high-speed data transmission and conforms to the IEEE 1394b transmission standard, and includes an insulating body 1, a plurality of conductive terminals 5, and the like. , An inner shielding housing 2, an outer shielding housing 3, a grounding member 6, and the like.
[0008]
The insulating body 1 has a root portion 13 provided at a rear end portion of the electrical connector, and a pair of parallel contact plates 111 and 112 extending forward from the root portion 13 are formed to extend upward. A plurality of terminal accommodating holes 12 are respectively provided on the lower surface of the abutting plate 111 and the upper surface of the second abutting plate 112 below, and the terminal accommodating holes 12 are extended rearward and penetrate the root portion 13. At its end is a “convex” shaped opening 134. A ridge 113 protrudes from the center of the second contact plate 112 toward the first contact plate 111. A plurality of grooves 135 are formed in an upright direction (or vertical direction) below the rear end portion of the root portion 13, and a portion of the root portion 13 positioned above the groove 135 is also slightly behind the groove 135. Are formed correspondingly, and the portions of the conductive terminals 5 are accommodated in the grooves 135 and 139, respectively. Further, on both sides of the root portion 13, slits 131 are formed in the upright direction at positions close to the outer shielding housing 3, and the inner shielding housing 2 is accommodated. The central portion of the slit 131 is formed by extending a lateral groove 132 connected to the slit 131 on both sides in the short direction, and a slot 133 is formed so that the end of the groove 132 is narrow and penetrates downward. Expansion portions 1321 and 1331 are formed at the upper portion of the groove 132 and the lower portion of the slot 133 so that both sides are widened at positions close to the bottom end.
[0009]
As shown in FIG. 4, the conductive terminals 5 are arranged side by side in both upper and lower rows, and a contact portion 52 that contacts a contact connector (not shown) as a mating electrical connector. A first fixing portion 51 extending rearward from the corresponding contact portion 52, a second fixing portion 53 extending bent backward from the first fixing portion 51, and the second fixing portion 53. And a joint portion 54 extending downward from the root portion 13 and connected in correspondence with the electric circuit of the circuit board. In the present embodiment, the joint 54 is soldered to the circuit board by surface mounting technology (SMT). The contact portion 52 is accommodated in the terminal accommodating hole 12, and the first fixing portion 51 is engaged with a “convex” -shaped opening 134 at the end of the terminal accommodating hole 12, and the second fixing portion 53 is engaged. Is engaged with grooves 135 and 139 formed at the rear end of the root portion 13. In this way, the conductive terminal 5 is attached to the insulating body 1.
[0010]
As shown in FIGS. 1 to 4, both the inner shielding housing 2 and the outer shielding housing 3 are integrally stamped and formed from a metal material, and the inner shielding housing 2 has outer peripheries of contact plates 111 and 112. It is formed to have both side walls 21 formed upright and a top wall 22 and a bottom wall 23 provided horizontally and connected to the side walls 21. A first accommodation space 4 is defined between the contact plates 111 and 112 and the side walls 21. The front end portion of the side wall 21 and the top wall 22 and the bottom wall 23 form a shielding frame so as to surround, and the rear end portion of the side wall 21 forms a plate body 26 in a portion extending from the shielding frame, and A pressure contact piece 27 protruding outward from the plate body 26 is formed at the front portion of the plate body 26 in a direction from the rear to the front, and a rectangular notch 28 is provided slightly below the rear portion of the plate body 26. In addition, a sharp pressure contact portion 29 is formed at the end of the plate body 26 below the notch 28 so as to be in pressure contact with a corresponding portion of the grounding member 6. The rear end portion of the side wall 21 is fitted into slits 131 formed on both sides of the rear end of the root portion 13 of the insulating body 1, and the pressure contact piece 27 is in pressure contact with the slit 131, thereby 2 is fixed, and the notch 28 corresponds to a corresponding portion of the grounding member 6. The outer shielding housing 3 includes the shielding frame body 3a and the shielding bottom cover 3b. The shielding frame body 3a is covered on the outer periphery of the root portion 13 and extends forward to form a rectangular frame mouth shape. A second accommodation space 7 is defined between the shielding frame 3 a and the inner shielding housing 2. The shielding frame 3a includes both side walls 32 that are formed upright, and a top wall 33 and a bottom wall 34 that are horizontally formed and connect the both side walls. A rectangular hole 321 is provided, and the lug-shaped grounding piece 31 is integrally extended below the rectangular hole 321 and connected to correspond to the grounding circuit of the circuit board. A recess 37 is formed in the middle of the top wall 33. The shielding bottom cover 3b is covered by the rear end surface of the root portion 13, and a frame-like plate body 38 is extended forward on both sides of the lower portion thereof, and is engaged with the rectangular hole 321 in the middle of the plate body 38. An engagement piece 381 is formed. Finger-shaped elastic pieces 24 that are bent and extended from the rear to the front and located in the second housing space 7 are provided at the center of both side walls 21 of the inner shielding housing 2. Both side walls 32 are provided with both finger-like elastic pieces 35 at positions corresponding to the finger-like elastic pieces 24 of the inner shielding housing 2. The elastic pieces bend and extend from the front to the rear, and the second accommodation space 7. Is positioned within. The elastic pieces 24 and 35 are provided so that when a contact connector (not shown) is inserted, they are pressed against a contact portion of the contact connector and positioned firmly. An engagement arm 36 is provided above the rear portion of the side wall 32, and the engagement arm 36 is bent inward and engaged with both sides of the rear end portion of the root portion 13.
[0011]
As shown in FIGS. 4 to 6, each of the grounding members 6 has a plate-like first main body portion 61 and a second main body portion 62 installed in an upright direction. The second main body portions 62 are alternately installed on the same plane, and the second main body portions 62 are wider than the first main body portion 1, and both the body portions are connected by an arc portion 66. . At the tip of the first main body portion 61, a head portion 63 extends upward, and first interference portions 631 are provided on both sides of the central portion. At the end of the head portion 63, a bent portion 64 is integrally extended rearward, extends horizontally rearward from the bent portion 64, and then tilts downward to be extended to form a contact portion 65. 28 so as to come into contact with a sharp pressure contact portion 29 below 28. A wide plate-like joint portion 67 is bent and extended downward from the second main body portion 62 and connected corresponding to the ground circuit of the circuit board. In this embodiment, a circuit using surface mounting technology (SMT) is adopted. Soldered to the board. The second main body portion 62 is provided with second interference portions 621 on both sides at a predetermined distance from the joint portion 67. The grounding member 6 is assembled from the back of the insulating body 1 so as to correspond to both sides of the root portion 13, and the head portion 63 and the first main body portion 61 are accommodated in a lateral groove 132 of the root portion 13, Further, the head portion 63 is made to correspond to the notch 28. The first fixing portion 631 is engaged in the extended portion 1321 of the groove 132, and the pressure contact portion 65 is pressed against the sharp pressure contact portion 29 below the notch 28 and is deformed in the upward direction. The two main body portions 62 are accommodated in a slightly narrow slot 133 below the groove 132, and the second interference portion 621 is engaged in an extension portion 1331 of the slot 133. As a result, the grounding member 6 is stably assembled in the root portion 13 of the insulating main body 1 and brought into excellent contact with the inner shielding housing 2 to provide excellent results in grounding effect and shielding function. Further, the joint 67 of the ground member 6 is formed in a wide plate shape so that the joint with the circuit board is more secure, and the ground member 6 is molded and manufactured independently. Easy to change.
[0012]
The above-described embodiment is merely a better embodiment of the present invention and does not limit the scope of the present invention. Any modification or change of details made by a person skilled in the art based on the present invention will be described. Are also within the scope of the claims of the present invention.
[Brief description of the drawings]
FIG. 1 is a perspective view of an electrical connector according to the present invention.
FIG. 2 is a front view of an electrical connector according to the present invention.
FIG. 3 is a perspective view of the inner shielding housing of the electrical connector according to the present invention as seen from the rear side.
FIG. 4 is a perspective view of the electrical connector according to the present invention viewed from the rear side in a state where the shielding bottom cover is not assembled.
5 is a cross-sectional view of the electrical connector according to the present invention in the VV line direction of FIG. 2;
FIG. 6 is a perspective view of a ground member of the electrical connector according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Insulation main body 2 ... Inner shielding housing 3 ... Outer shielding housing 3a ... Shielding frame 3b ... Shielding bottom cover 4 ... 1st accommodation space 5 ... Conductive terminal 6- ..Grounding member 7 ... second housing space 12 ... terminal housing hole 13 ... roots 21, 32 ... side walls 22,33 ... top walls 23,34 ... bottom walls 24,35 ... Finger-shaped elastic piece 26 ... Plate body 27 ... Press contact piece 28 ... Notch 29 ... Press contact part 31 ... Grounding piece 36 ... Engagement arm 37 ... Recess 38 ... Frame-like plate body 51 ... first fixing portion 52 ... contact portion 53 ... second fixing portion 54 ... joining portion 61 ... first main body 62 ... Second main body 63 ... head 64 ... bent 65 ... contact 66 ... arc 67 ... joining 111 ... first contact plate 112 .... Second contact plate 113 ... ridge 131 ... slit 132 ... groove 133 ... slot 134 ... opening 135, 139 ... groove 321 ... rectangular hole 381 ... Engagement piece 621 ... 2nd interference part 631 ... 1st interference part 1321, 1331 ... extension part

Claims (10)

An electrical connector disposed on a circuit board and used to contact a contact connector as a mating electrical connector,
A root portion provided at a rear end portion of the electrical connector; and a first contact plate and a second contact plate extending forward from the root portion and formed in parallel directions. A plurality of terminal receiving holes, the terminal receiving holes extending rearward and penetrating through the root; and
A contact portion that is received corresponding to the terminal receiving hole and contacts the contact connector, a fixing portion that extends rearward from the corresponding contact portion, and that is connected to the fixing portion and extends from the insulating body. A plurality of conductive terminals including a joint connected to correspond to an electric circuit on the circuit board;
Surrounding the outer peripheries of the first and second abutment plates of the insulating body, defining a first accommodating space therein , both side walls formed in an upright direction, and formed in a horizontal direction and integrated with the both side walls An inner shielding housing having a top wall and a bottom wall connected to each other, and provided with a notch at a rear end portion of the side wall , and a sharp pressure contact portion formed below the notch,
Surrounding the outer periphery of the root portion of the insulating body and extending forward, a second receiving space is formed between the inner shielding housing, and the first receiving space and the second receiving space are in contact with the contact connector. An outer shielding housing provided to incorporate the part;
Assembled in a portion of the insulating body adjacent to said shielding housing, a main body portion that engages before Symbol insulating body, and a head portion which corresponds to the cut opening as extending from the distal end of the main body portion At least a contact portion extending from the head portion and a joint portion extending from the insulating body, the joint portion being connected corresponding to a ground circuit of a circuit board, the contact portion being the notch A grounding member that is in pressure contact with the lower pressure contact portion ;
An electrical connector comprising: A plurality of parallel terminal receiving holes are provided on the lower surface of the upper first contact plate and the upper surface of the lower second contact plate, respectively, and the terminal ends of the terminal receiving holes are “convex” -shaped openings. The conductive terminals are arranged in an upper row and a lower row so as to be received in the terminal receiving holes, and the fixing portion includes a first fixing portion extending rearward from the contact portion, and the first fixing portion. 2. A second fixing portion that bends and extends rearward from the portion, and the first fixing portion is locked to a “convex” -shaped opening at a terminal end of the terminal receiving hole. Electrical connector as described. The central portion of the second contact plate, the electrical connector according to claim 2, wherein a ridge which extends in the direction of the first contact plate. The root portion has an upper row groove and a lower row groove formed in an upright direction, and the upper row groove is disposed behind the lower row groove, and the groove is associated with the second fixing portion of the conductive terminal. The electrical connector according to claim 2 , wherein the electrical connectors are combined. A rear end of the side wall of the inner shielding housing is formed in a plate shape, and a pressure contact piece projecting from the plate body from the rear to the front is formed in the front portion of the plate body, and the plate-like rear portion is slightly A rectangular cutout is formed at a lower position, and a slit is formed in the upright direction at a position close to the outer shielding housing on both sides of the root portion to accommodate the plate at the rear end of the inner shielding housing. The electrical connector according to claim 1 , wherein the pressure contact piece is configured to fix the inner shielding housing by being pressed against the slit . A central portion of the slit is extended to an outer shielding housing to form a lateral groove connected to the slit, and a slot that narrows and penetrates downward is formed at the end of the groove. 6. The electrical connector according to claim 5 , wherein an extended portion is formed below the slot so that both sides are widened at positions adjacent to the bottom end. The grounding member has a first main body portion and a second main body portion installed in an upright direction, and the first main body portion and the second main body portion are alternately installed on the same plane. And the second main body portion is formed wider in the shorter direction than the first main body portion, and both the body portions are connected by an arc portion, and the first main body portion is a lateral groove of the root portion. The electrical connector according to claim 6 , wherein the electrical connector is housed in the slot, and the second main body portion is housed in a slot in the root portion. The head portion extends upward from the tip of the first main body portion of the grounding member, and first interference portions that engage with the expansion portions of the slot are provided on both sides of the head portion, and at the end of the head portion. The bent portion is extended rearward, a contact portion is formed that extends horizontally rearward from the bent portion and is further inclined downward, and the contact portion is pressed against the press-contact portion below the notch opening. The electrical connector according to claim 7 , wherein the electrical connector is deformed upward . The grounding member is formed with a wide plate-like joint that is bent downward and extended from the second main body, and the second main body of the grounding member is separated from the joint by a predetermined distance. The electrical connector according to claim 7, further comprising a second interference portion that engages with the groove of the root portion . The outer shielding housing includes a shielding frame body that covers the outer periphery of the root portion and a shielding bottom cover that covers the rear end surface of the root portion, has a rectangular hole below the rear end of the shielding frame body, and is provided on both sides of the shielding bottom cover. A rectangular frame-shaped plate body is extended downward in the direction of the shielding frame body, an engagement piece is provided at the center of the plate body, and the engagement piece is engaged with the rectangular hole in the shielding frame body. The electrical connector according to claim 1.

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