EP0454278A2

EP0454278A2 - Electrical connector for use on a circuit board

Info

Publication number: EP0454278A2
Application number: EP91201815A
Authority: EP
Inventors: Yoshitsugu Fujiura
Original assignee: AMP Inc; Whitaker LLC
Current assignee: Whitaker LLC
Priority date: 1986-12-12
Filing date: 1987-11-16
Publication date: 1991-10-30
Anticipated expiration: 2007-11-16
Also published as: EP0454278A3; EP0454278B1

Abstract

An electrical connector (5') for use on a circuit board (82) comprises an insulating housing (50). Electrical contacts (65') secured in upper and lower rows in the housing (50) have contact sections (65a') positioned in an opening (51') in the housing (50) for engaging complementary electrical contacts (45') of a mating electrical connector (1'). The electrical contacts (65') also have post sections (65b') extending from the rear surface of the housing (50), outwardly and downwardly in upper and lower parallel rows. The post sections (65b') of the upper contacts (65') are arranged in a an upper row and the post sections of the lower contacts (65') are arranged in a lower row. The post sections (65b') of the upper row have conductor engaging sections (65c') engaging on the upper surface of the circuit board (82) and the post sections (65b') of the lower row have conductor engaging sections (65c') engaging against the lower surface of the circuit board (82).

Description

This invention relates to an electrical connector for use on a circuit board.
There is disclosed and claimed in European patent application No. 87908060.4 from which the present application has been divided, a shielded electrical connector comprising an insulating housing having electrical contacts secured in the housing, the electrical contacts having contact portions and conductor-connection portions for electrical connection to insulated electrical conductors of a shielded cable, a shielding member covering the insulating housing and for electrical connection with a shield of the cable, an insulating cover positioned on shielding member, characterized in that said insulating cover has openings extending along respective sides between the shielding member and the insulating cover, latching members having sections positioned respectively in said openings and latching sections extending forwardly from said insulating cover for latching engagement with latching sections of a matable electrical connector; and fulcrums provided between the latching members and the shielding member enabling the sections and latching sections to move toward and away from the shielding member.
The present invention consists in an electrical connector for use on a circuit board, the connector comprising an insulating housing having electrical contacts secured in rows with contact sections positioned in an opening in the housing for electrical engagement with complementary electrical contacts of a matable electrical connector and post sections extending outwardly from a rear surface of the housing and downwardly in parallel rows with the post sections of the upper contacts being disposed in an outer row and the post sections of the lower contacts being disposed in an inner row, characterized in that:
the post sections of the outer row have conductor-engaging sections for extending along an upper surface of the circuit board and the post sections of the inner row have conductor-engaging sections for extending along a bottom surface of the circuit board.
For a better understanding of the present invention reference will now be made by way of example to the accompanying drawings, in which:
Figure 1 is an exploded perspective view of a shielded electrical connector and a mating electrical connector.
Figure 2 is another perspective view of the shielded connector shown in Figure 1.
Figure 3 is a top plan view of the shielded connector with half of the connector shown in cross section.
Figures 4 and 5 are respectively a cross section and a perspective view of the insulating housing of the shielded connector.
Figure 6 is a perspective view of the latching members for use in the shielded connector.
Figures 7 through 9 are a respective bottom plan views of the mating connector and its cross sections taken on the lines VIII - VIII and IX - IX, of Figure 7.
Figure 10 is a cross section of the shielded connector and the mating connector of Figures 1 to 9 in the connected condition, and
Figure 11 is a similar view to that of Figure 10, of a shielded electrical connector when mated with a mating electrical connector, according to an embodiment of the present invention certain parts of which are disclosed in Figures 1 to 9.
Figures 1 through 9 are included and described herein to facilitate a proper understanding of the present invention.
Figure 1 is a perspective view of a shielded electrical connector 1 and a mating electrical connector 5 with which the connector is to be electrically connected. Shielded connector 1 is electrically connected to one end of a shielded cable 7. Inside connector 1, a dielectric housing 40 is located which holds a multiplicity of electrical contacts 45; each contact 45 is connected with respective insulated electrical conductors 73 in cable 7. Housing 40 is covered with a metal shielding member 20 mounted thereon, which member 20 is in turn mostly covered with an insulating cover 10 mounted thereon. Each of multiple insulated electrical conductors 73 in shielded cable 7 is shielded by means of a woven shielding material 72 such as a metal mesh illustrated in cross section in Figure 3. As shown in Figure 2, shielding member 20 is provided with a first opening 21 at its front end, through which opening the connecting contact portions (not shown) of the electrical contacts extend.
Latching members 30 that extend from the front toward the rear of cover 10 are inserted and fixed in the spaces between the portions of shielding member 20 on the right and left sides of connector 1 and insulating cover 10. Latching members 30 include latching sections 31 which latchably engage the latching sections of the mating connector. Further, on opposite sides, insulating cover 10 is provided with flexible arms 11 having engaging portions 11a at their rear ends, and front portions 11b which pivotally connect to the body of insulating cover 10 so that arms 11 extend along the respective sides of the cover.
Mating connector 5 comprises an insulating housing 50 having a multiplicity of electrical contacts to be connected with the contacts of shielded connector 1. A shield member 6 is mounted on the front end of housing 50 for electrical engagement with the shielding member 20 of shielded connector 1. Latching members 61 are located on shield member 61 protruding outwardly therefrom.
Insulating housing 40, as shown in Figures 3-5, holds therein a multiplicity of electrical contacts 45 in an array. Shielding member 20 covers insulating housing 40 which includes a lower member 41 and an upper member 42 as shown in Figures 4 and 5 (upper member 42 is not shown in Figure 5). The multiplicity of electrical contacts 45 are each inserted in respective retention grooves 41a formed on an upper front surface of lower member 41.
Each contact 45 is formed as an L-shaped metal plate and has a contact portion 46 as part of the long leg of the metal plate and a short leg conductor-connection portion 47 extending upward. Contact portion 46 electrically engages in a wiping manner along a corresponding electrical contact of mating connector 5 when connectors 1 and 5 are mated to form an electrical connection therebetween. Conductor-connection portion 47 is electrically connected to the conductor core of a corresponding conductor 73 of shielded cable 7 when conductor 73 is forced into a corresponding slot 47a causing the edges thereof to cut into the insulation thereby electrically engaging the conductor core of conductor 73.
Each contact 45 also has first protrusion 45a at its front end and extending laterally from both sides thereof, and second protrusions 45c located on conductor-connection portion 47 and extending laterally from both sides thereof. When contacts 45 are inserted into retention grooves 41a, first and second protrusions 45a, 45c are forced respectively in retention grooves 41a, they bite into the side surfaces of the retention grooves thereby retaining contacts 45 therein. Further, each contact 45 contains a retention hole 45b intermediate the contact into which extends a retention protrusion 41d provided in groove 41a. By applying heat to retention protrusions 41d, they are deformed thereby positively securing contacts 45 in grooves 41a. When contacts 45 are each secured in respective retention grooves 41a, conductor-connection portions 47 are positioned in an upward direction, and insulated conductors 73 of shielded cable 7 are force fitted in slots 47a of respective conductor-connection portions 47, the edges of slots 47a cutting into the insulation of the conductors thereby electrically connecting the conductor cores with the conductor-connection portions 47. It is to be noted that as the insulated wires 73 are thus force fitted into slots 47a, they are guided by a multiplicity of guiding grooves 41b in spaced upper portions of lower member 41. After the completion of the termination of conductors 73 to contacts 45, upper member 42 is latchably mounted onto lower member 41 so as to maintain conductors 73 in slots 47a and protect the terminations therebetween.
After conductors 73 are each connected with respective contacts 45, shielding member 20 is mounted onto insulating housing 40. Shielding member 20 is formed from two interengaging members of good electrical conducting material such as brass, with its front section being box-shaped and its rear section being drawn into a cylindrical configuration that receives shielded cable 7. Shielding member 20 is provided at its front end with a first opening 21 along which contact portions 46 of contacts 45 extend and at the back end with second opening 23 for receiving an exposed section of the shield 72 and the inner insulation jacket 74 in which conductors 73 are located. A cylindrical ferrule 25 is disposed onto cylindrical portion 22 forming second opening 23 which via an interference fit maintains the sections forming cylindrical portion 22 in engagement with each other and with the exposed shielding material 72. Ferrule 25 also engages the end of cable 7 and is crimped thereon to form a strain relief.
Next, insulating cover 10, which is made of stiffly-flexible insulating material such as polyolefin, is positioned over the outer surface of shielding member 20. Insulating cover 10 comprises a body 12 to cover the rear section of shielding member 20 and arms 12 extending along the opposite sides of body 12. Arms 11 are integrally connected with body 12 at front portions 11b and they extend towards the rear end of body 12; arms 11 are provided with engaging portions 11a. Cover body 12 has a first opening at its front end from which the front end of shielding member 20 projects forwardly, and at its rear end a second opening through which shielded cable 7 extends which has been connected with contacts 45 in insulating housing 40. Inner end 12a of body 12 tightly engages outer insulation jacket 70 of cable 7 as shown in Figure 3.
Openings 15 in insulating cover 10 extend between arms 11 and respective opposite sides of shielding member 20. A latching member 30 is force fitted into a channel-shaped recess 11c extending along an inside surface of each arm 11. A pair of such latching members 30 shown perspectively in Figure 6 are fabricated from a sheet metal such as stainless steel into the shape as shown. Latching members 30 each have inwardly-bend portions or latching sections 31 at their front ends and fulcrum arms 33 intermediate their ends. Further, on the upper and lower edges of the locking member 30 are located latching protrusions 34 which bite into the sides of the channel-shaped recesses of arms 11 thereby firmly securing latching members 30 therein along openings 15.
Front sections of members 30 containing latching sections 31 extend forwardly from a front end of cover 10 and along respective sides of shielding member 20 as shown in Figures 2 and 3. Fulcrum arms 33 abut against the sides of shielding member 20 so that rear ends 32 are located at a position corresponding to engaging portions 11a of arms 11. Thus, when engaging portions 11a are pushed inwardly (in the direction indicated by arrow A), arms 11 pivot about front portions 11b which in turn move rear ends 32 of latching members 30 inwardly. With this motion,latching members 30 pivot about fulcrum arms 33 so that the front ends containing latching sections 31 are moved outwardly (in the direction indicated by arrow B). These latching sections 31 engage latching sections 61 of mating connector 5 when connectors 1 and 5 are mated, thereby latching them together.
Thus, the engagement and the disengagement between latching sections 31 and 61 can be accomplished by pushing engaging portions 11a which is followed by the movement of the latching sections 31. Accordingly, when it is desired to connect or disconnect mating connector 5 with shielded connector 1, connection or disconnection can be easily done by pushing onto engaging portions 11a to thereby release the latching engagement between latching sections 31 and 61. In this case, since latching members 30 are made of a strong material such as stainless steel, the latching engagement of the latching sections is firm enough to securely hold both electrical connectors together. Further, latching members 30 are made thin, as shown in Figure 6, so as not to make the size of the shielded connector larger and still perform a positive latching operation.
Mating connector 5, as shown in Figures 7-9, comprises an insulating housing 50 made of a suitable insulating material and a shielding member 60. Insulting housing 50 has a multiplicity of electrical contacts 65 secured in an array therein. An opening 51 is located in a front end of housing 50 for receiving the front end of insulating housing 40 of shielded connector 1. Spring contact portions 65a of contacts 65 project into opening 51. As the front end of insulating housing 40 of shielded connector 1 is inserted into opening 51, contact portions 46 of contacts 45 slidably electrically engage contact portions 65a of contacts 65 to establish electric connection therebetween. It can be seen that contact posts 65b of contacts 65 secured in insulating housing 50 project outwardly from and downwardly along the rear surface of housing 50. Shielding member 60 has at its front end a flange 63 that receives the front end of shielding member 20 of shielded connector 1 in electrical engagement therewith. On the right and left sides of flange 63 are located latching sections 61 which protrude forwardly. Shielding member 60 is provided with bolt-insertion holes 62 for bolting mating connector 5 on a circuit board.
In this case as shown in Figure 10, mating connector 5 is bolted on a first board or boards 81 by bolts (not shown) through bolt-insertion holes 64, and on a second board 82 by bolts (not shown) through bolt-insertion holes 62 with a front section of the connector being disposed in opening 81a. When connectors 1, 5 are connected, the front end of shielding member 20 is received along flange 63 of shielding member 60 and they electrically engage against each other, and the corresponding contacts 45, 65 of connectors 1,5 electrically engage one another along contact portions 46,65a. Contact posts 65b of contacts 65 are inserted through respective holes of second board 82 and soldered to conductive areas thereof. As can be seen in Figure 10, a depression 24 is located in shielding member 20 in which a projection 13 on an inside surface of insulating cover 10 fits so as to maintain insulating cover 10 in position on shielding member 20.
Figure 11 shows another example of the shielded connector, 1′, wherein contacts 45′ are located in upper and lower rows in insulating housing 40′ in shielded connector 1′, and contacts 65′ are also disposed in upper and lower rows in insulating housing 50 of mating connector 5′, according to an embodiment of the present invention, with contact portions 65a′ extending into opening 51′. Contact posts 65b′ of contacts 65′ have contact sections 65c′ that extend along opposite top and bottom surfaces of second board 82, so that they can make electrical connection with conductive areas on either surface of second board 82. A shield member 60′ may be secured onto the insulating housing 50 of the connector 5′, and may include latching members 61 described above.
The posts 65b′ extend outwardly from the rear surface of the housing 50 and downwardly in parallel rows with the posts 65b′ of the upper contacts 65′ disposed in an outer row and the posts 65b′ of lower contacts 65′ disposed in an inner row.

Claims

An electrical connector for use on a circuit board, the connector comprising an insulating housing (50) having electrical contacts (65′) secured in rows with contact sections (65a′) positioned in an opening (51′) in the housing (50) for electrical engagement with complementary electrical contacts (45′) of a matable electrical connector (1′) and post sections (65b′) extending outwardly from a rear surface of the housing (50) and downwardly in parallel rows with the post sections of the upper contacts being disposed in an outer row and the post sections of the lower contacts being disposed in an inner row, characterized in that:
the post sections (65b′) of the outer row have conductor-engaging sections (65c′) for extending along an upper surface of the circuit board (82) and the post sections (65b′) of the inner row have conductor-engaging sections (65c′) for extending along a bottom surface of the circuit board.
An electrical connector as claimed in claim 1, characterized in that a shield member (60′) is secured onto the insulating housing (50).
An electrical connector as claimed in claim 2, characterized in that said shield member (60′) includes latching members (61).