CN1223745A - Cable connection device for electrical connector - Google Patents

Abstract

A cable connection arrangement is provided wherein the braids (108) of a plurality of coaxial cables (100) are soldered to a grounding member (30), and the signal conductors are covered by inner insulators (110) and which extend forward beneath the grounding member (30). Ground plates (32) are formed on the grounding member (30) so that these ground plates (32) protrude from one edge of the ground member (30). The ground plates (32) and inner insulators (110) are offset from each other by approximately one-half pitch. The ground plates (32) and the signal conductors are connected at the same time by press fitting into terminals (20a and 20b).

Description

Cable connection device for electrical connector

The invention relates to a cable connection structure for an electric connector, in particular to a cable connection structure for an electric connector suitable for connecting multiple coaxial cables.

Generally, the electrical connector 200 shown in FIG. 11 is referred to as an electrical connector for multiple wire cables. A flat cable 220 having a signal line 202 and a ground line 204 and mounted on a brake frame 222 is connected to the electrical connector 200 . The electrical connector 200 has an insulating base plate 206 and ground plates 208 disposed on both surfaces of the base plate 206 . Protruding from the rear end of the ground plate 208 is a contact location 210 having a slot 212 . The ground wire 204 and the signal wire 202 of the flat cable 220 are respectively connected to the groove 212 and pressed against a mating type connector (not shown in the figure).

Since the above-mentioned cable connected to the electrical connector is a flat cable 220, it is easy to make the end portions of the ground wire 204 and the signal wire 202 extend parallel to each other. However, in the case of a single spaced round cable, it is difficult to arrange the end portions of the cable so that the end portions are parallel to each other and to maintain a prescribed interval between the ground wire and the signal wire. As a result, it is difficult to connect the end portions of these wires to the joints. In order to avoid such problems, when connecting these wires, extra work must be done, such as soldering and the like. Second, in the case of soldering, damage to the mount due to heat is also a potential problem.

In view of the above-mentioned problematic points, it is an object of the present invention to provide a cable connection device for an electrical connector which can be easily assembled even in the case of circularly spaced cables.

The cable connection device of the cable connector provided by the present invention is characterized in that it is an insulating mount, which has a plurality of ground wire joints and signal joints, wherein the ground wires and signal wires of the cable are connected to the corresponding joints, these The connectors are compression fit type connectors. A cable subassembly is used in which a grounding part with a plurality of protruding ground plates is provided along one edge of the main body. The ground wires are connected to the ground plane, while the signal wires are moved about half a pitch from the ground plane.

The invention is described below by way of example with reference to the accompanying drawings, in which:

Fig. 1 is the plan view illustrating an electric connector, and this connector uses the cable connection device for electric connector provided by the present invention;

Fig. 2 is a front view of the electrical connector shown in Fig. 1, viewed from the direction indicated by arrow A in Fig. 1;

Figure 3 is a plan view similar to Figure 1 with the cover removed;

Fig. 4 is a partially enlarged view showing the interior of the electrical connector;

Figure 5 is a plan view showing the connection of the ground member to the carrier strip;

Fig. 6 is a side view of the grounding part shown in Fig. 5, viewed from the direction indicated by arrow B in Fig. 5;

Figure 7 is a plan view of the end portion of the cable subassembly;

Figure 8 is a side view of the end portion of the cable subassembly;

Fig. 9 is a sectional view along line IX-IX of Fig. 4;

Fig. 10 is a front view illustrating the relationship between the ground plate and the press contact part;

Fig. 11 is a perspective view illustrating a prior art cable connection structure for an electrical connector.

The present invention will now be described in detail with reference to the accompanying drawings. Fig. 1 is a plan view showing the appearance of an electrical connector (hereinafter simply referred to as "connector") using a cable connection device for an electrical connector provided by the present invention. Fig. 2 is a front view taken from the direction indicated by arrow A in Fig. 1 .

In FIG. 1, an electrical connector 1 has insulating covers 4, 4' used facing each other in a two-part configuration and a screw 6 for connection to a mating connector ( Not shown in the figure), they are arranged on the two ends of cover 4,4'. The cable cover 150 accommodates a plurality of coaxial cables 100 (hereinafter simply referred to as "cables") (see FIG. 3 ) and a heat-shrinkable tube 150 which seals an end portion of the cable cover 150 . The covers 4, 4' are fastened together as a unit by mutual bayonet engagement, screws or the like. Projecting from the front end 8 of the cover 4 is a metal housing 10 which engages a mating connector.

Next, the connector 1 seen from the engaged side (that is, viewed from the direction indicated by arrow A in FIG. 1 ) will be described with reference to FIG. 2 . Housing 10 has an elongated substantially rectangular shape, and insulation displacement contact (IDC) contacts 20 are arranged in two rows within housing 10 .

Next, the connector 1 is described in more detail with reference to FIGS. 3 and 4 . Figure 3 is a plan view similar to Figure 1 but showing the connector 1 with the covers 4, 4' removed. FIG. 4 is a partially enlarged plan view of the inside of the connector 1 . In FIG. 3 , a metal braid 156 serving as a shield extends from an end portion 154 of the cable jacket 150 ; from which end portion 154 protrudes a plurality of individual cables 100 . Braid 156 surrounds bundle of cables 100 . The outer insulation 101 of the cable 100 is also stripped from the top portion, so that the inner insulation 110 ( FIG. 4 ) of the cable 100 is exposed, and the cable 110 is connected to the corresponding IDC connector 20 . Details of this structure will be described later. The front of each IDC connector 20 is surrounded by housing 10 to provide electromagnetic shielding. Likewise, the rear portion of the exposed cable 100 and IDC connector 20 protruding from the top portion of the braid 156 is covered with a shield cover 22 having a two-part construction. The shield cover 22 is fastened to the braid 156 with anchor claws provided on the rear portion of the shield cover 22 , while the front portion 23 of the shield cover 22 engages the periphery of the housing 10 .

The impact resistance of the connection structure is preferably improved by sealing the inside of the shield cover 22 with a filler such as ethylene vinyl acetate. Next, after the heat-shrinkable tube 152 is moved from the position shown in the figure in the direction of arrow X, the tube is shrunk by heating so that the end 154 of the outer casing 150 and the braid 156 are sealed.

The connection area between the cable 100 and the IDC connector 20 will now be described with reference to FIG. 4 . The outer insulation 101 on the cable 100 is stripped, leaving the inner metal braid (ground) 108 exposed. These inner braids 108 are unraveled, twisted to one side and welded to the ground member 30 . The inner insulating layer 110 including a signal wire of each cable 100 is disposed under the ground member 30 such that the insulating layer protrudes forward. The ground plate 32 protruding from the ground member 30 is connected to the ground connection 20a, and the inner insulating layer 110 is connected to the signal connection 20b. The details of these connections will be further described with reference to Figure 5 and subsequent figures.

FIG. 5 is a plan view showing ground members 30 and 30' attached to carrier strip 34 prior to assembly. The ground members 30 and 30' and the carrier strip 34 are stamped from a metal strip as an integral unit. In FIG. 5 , the length of the ground members 30 and 30 ′ is such that the ground members 30 and 30 ′ can be disposed in the corresponding connector 1 . Since the ground member 30 and the ground member 30' are identical, only the ground member 30 will be described below. On one edge 36 of the main body 31 of the ground member 30 is formed a protruding ground plate 32 as an integral part along its length. The ground plate 32 is formed by punching in the form of a rectangular flat plate from the main body 31 as an integral part thereof, and then twisted at 90 degrees so that the surface of the ground plate 32 is perpendicular to the surface of the main body 31 . The intervals of these ground plates 32 are the same as the intervals of the ground terminals 20a. The other edge 38 of the main body 31 is connected in several places to the carrier strip 34 by means of connecting elements 40 . A groove 42 is formed in the connection member 40 near the edge 38 so that the ground member 30 can be easily removed from the carrier strip 34 .

FIG. 6 is a side view of the ground member 30 shown in FIG. 5, as viewed from the direction indicated by arrow B. Referring to FIG. The shape of the ground plate 32 can be easily understood from this figure.

Next, FIG. 7 shows a plan view of the cable subassembly 120 assembled by connecting the cable 100 to the ground member 30 . The respective cables 100 protrude from the braid 156 by substantially the same length, and are connected to the ground member 30 such that the cables 100 are disposed between adjacent ground plates 32 . As described with reference to FIG. 4, when the braid 108 is connected to the plate-like main body 31, the inner insulating layer 110 of the cable 100 extends from a position substantially in the middle between adjacent ground plates 32, as shown in plan view. shown. Specifically, the ground plates 32 and the insulating layers 110 are alternately provided at predetermined intervals. This interval is equal to the interval between the ground terminal 20a and the signal terminal 20b. Following installation of the cable 100, the tips of the insulating layer 110 are naturally arranged in the arcuate pattern shown in the figure; however, these tips are cut to form an even distribution prior to connection to the splice by crimping the contacts.

FIG. 8 shows a side view of one end portion of the cable subassembly 120 . The inner insulating layer 11 will be easily understood from this figure. Extension below the plate-like body 31 . The end of the cable subassembly 120 has an almost flat shape. Since the ground member 30 and the signal line are insulated from each other by the inner insulating layer 110, there is no risk of a short circuit.

As shown in FIG. 9, an opening 48 is formed in the front portion 47 of the housing 10 into which a mating connector is inserted. An insulating front mount 50 is secured to rear portion 49 by detents (not shown) on both ends of housing 10 . The method used to secure the front seat frame 50 in place may also be some other method, such as the engagement of male and female parts, and the like. The front mount 50 has a base member 52 retained in the housing and a retainer plate 54 projecting forwardly from approximately the center of the base member 52 as an integral part of the base member 52 . In both surfaces of the fixing plate 54 are formed grooves 58 in which the contact parts 56 of the joints 20a and 20b are disposed. The top end 62 of the contact member 56 of the connectors 20a and 20b is secured in the top end of the groove 58 . In the rear portion of the front frame 50 , an insulating rear frame 60 is secured to the front frame 50 by bayonet engagement (not shown) at both ends of the rear frame 60 . The front mount 50 and the rear mount 60 will be collectively referred to as "insulation mount 70". The joints 20 a and 20 b are preinstalled in the rear seat frame 60 . The positions of the respective pressing contact parts 62a and 62b of the joints 20a and 20b move in the front-to-back direction. Accordingly, the joints 20a and 20b are arranged in a staggered configuration along the length of the rear frame 60 .

On the rear portion of the rear seat frame 60, a plurality of arms 68 having wedge-shaped projections 66 on their top ends are provided such that these arms 68 are located between adjacent joints 20a and 20b. The ground plate 32 and the inner insulation 110 of the cable subassembly 120 are pushed between the respective arms 68 while being connected to the compression fit sections 62a and 62b of the respective connectors 20a and 20b. As a result, connection can be accomplished very easily without any complicated process such as soldering. Second, there is no damage to the insulating mount 70 due to welding heat.

Figure 10 illustrates the press fit of the ground plate 32 in the slot 64a of the press fit section 62a. The thickness of each ground plate 32 is about 0.25 mm, and the "give" amount in engagement is about 0.07 mm. When the ground plate 32 is press fit in the slot 64a, the slot 64a expands slightly, and the ground plate 32 contacts the slot 64a, so that the ground plate 32 is clamped by the sides of the slot 64a, so that the ground plate 32 contacts Portions of the groove 64a are cold welded. A relatively soft metal such as pure copper or ductile copper is suitable as the material for the ground plate 32 . Therefore, the ground plate 32 is firmly held in the press-fit section 62a. In this embodiment, the cross-sectional shape of the ground plate 32 is substantially rectangular; however, the shape may also be oval, or its lower end may be pointed so as to be smoothly press-fitted into the groove.

One embodiment of the present invention has been described in detail above. However, the present invention is not limited to this example. Various modifications and changes can be made. For example, it is also possible to weld the braid 108 to the plate-like main body portion 31 of the ground member 30 without dismantling the braid 108 . In this case, the inner insulator 110 extends above the main body portion 31 .

Claims (4)

1. An electrical connector having an insulating housing and a plurality of signal contacts for receiving a plurality of signal conductors and a corresponding plurality of ground contacts for receiving a braid disposed around each signal conductor, the The electrical connector is characterized by: A subassembly has a grounding member comprising a plurality of protruding ground plates disposed along one edge of a body and configured to conduct conductive engagement with the braid, the ground plates extending from the main body being connected to the ground wire The contacts are engaged, and the contacts of the local lines are arranged near a signal contact, and the signal wires beyond the main body are engaged with the signal contacts, and each signal contact is arranged near a ground plate. 2. 2. The electrical connector as recited in claim 1, wherein the signal contacts are configured to displace the insulation around each signal conductor. 3. The electrical connector as recited in claim 1, wherein each braid is soldered to the body. 4. The electrical connector as claimed in claim 1, wherein each ground plate protrudes from the main body and is twisted so as to be in a position perpendicular to the main surface of the main body.

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